Mercurial > sdl-ios-xcode
annotate src/video/SDL_RLEaccel.c @ 2153:760c1bd2d625
Reverted mousewheel support in 1.2, since it breaks binary compatibility.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Fri, 06 Jul 2007 13:45:10 +0000 |
parents | c121d94672cb |
children | 926294b2bb4e |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
0 | 23 |
24 /* | |
25 * RLE encoding for software colorkey and alpha-channel acceleration | |
26 * | |
27 * Original version by Sam Lantinga | |
28 * | |
29 * Mattias Engdegård (Yorick): Rewrite. New encoding format, encoder and | |
30 * decoder. Added per-surface alpha blitter. Added per-pixel alpha | |
31 * format, encoder and blitter. | |
32 * | |
33 * Many thanks to Xark and johns for hints, benchmarks and useful comments | |
34 * leading to this code. | |
35 * | |
36 * Welcome to Macro Mayhem. | |
37 */ | |
38 | |
39 /* | |
40 * The encoding translates the image data to a stream of segments of the form | |
41 * | |
42 * <skip> <run> <data> | |
43 * | |
44 * where <skip> is the number of transparent pixels to skip, | |
45 * <run> is the number of opaque pixels to blit, | |
46 * and <data> are the pixels themselves. | |
47 * | |
48 * This basic structure is used both for colorkeyed surfaces, used for simple | |
49 * binary transparency and for per-surface alpha blending, and for surfaces | |
50 * with per-pixel alpha. The details differ, however: | |
51 * | |
52 * Encoding of colorkeyed surfaces: | |
53 * | |
54 * Encoded pixels always have the same format as the target surface. | |
55 * <skip> and <run> are unsigned 8 bit integers, except for 32 bit depth | |
56 * where they are 16 bit. This makes the pixel data aligned at all times. | |
57 * Segments never wrap around from one scan line to the next. | |
58 * | |
59 * The end of the sequence is marked by a zero <skip>,<run> pair at the * | |
60 * beginning of a line. | |
61 * | |
62 * Encoding of surfaces with per-pixel alpha: | |
63 * | |
64 * The sequence begins with a struct RLEDestFormat describing the target | |
65 * pixel format, to provide reliable un-encoding. | |
66 * | |
67 * Each scan line is encoded twice: First all completely opaque pixels, | |
68 * encoded in the target format as described above, and then all | |
69 * partially transparent (translucent) pixels (where 1 <= alpha <= 254), | |
70 * in the following 32-bit format: | |
71 * | |
72 * For 32-bit targets, each pixel has the target RGB format but with | |
73 * the alpha value occupying the highest 8 bits. The <skip> and <run> | |
74 * counts are 16 bit. | |
75 * | |
76 * For 16-bit targets, each pixel has the target RGB format, but with | |
77 * the middle component (usually green) shifted 16 steps to the left, | |
78 * and the hole filled with the 5 most significant bits of the alpha value. | |
79 * i.e. if the target has the format rrrrrggggggbbbbb, | |
80 * the encoded pixel will be 00000gggggg00000rrrrr0aaaaabbbbb. | |
81 * The <skip> and <run> counts are 8 bit for the opaque lines, 16 bit | |
82 * for the translucent lines. Two padding bytes may be inserted | |
83 * before each translucent line to keep them 32-bit aligned. | |
84 * | |
85 * The end of the sequence is marked by a zero <skip>,<run> pair at the | |
86 * beginning of an opaque line. | |
87 */ | |
88 | |
89 #include "SDL_video.h" | |
90 #include "SDL_sysvideo.h" | |
91 #include "SDL_blit.h" | |
92 #include "SDL_RLEaccel_c.h" | |
93 | |
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94 #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && SDL_ASSEMBLY_ROUTINES |
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95 #define MMX_ASMBLIT |
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96 #endif |
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97 |
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98 #ifdef MMX_ASMBLIT |
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99 #include "mmx.h" |
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100 #include "SDL_cpuinfo.h" |
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101 #endif |
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102 |
0 | 103 #ifndef MAX |
104 #define MAX(a, b) ((a) > (b) ? (a) : (b)) | |
105 #endif | |
106 #ifndef MIN | |
107 #define MIN(a, b) ((a) < (b) ? (a) : (b)) | |
108 #endif | |
109 | |
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110 #define PIXEL_COPY(to, from, len, bpp) \ |
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111 do { \ |
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112 if(bpp == 4) { \ |
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113 SDL_memcpy4(to, from, (size_t)(len)); \ |
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114 } else { \ |
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115 SDL_memcpy(to, from, (size_t)(len) * (bpp)); \ |
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116 } \ |
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117 } while(0) |
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118 |
0 | 119 /* |
120 * Various colorkey blit methods, for opaque and per-surface alpha | |
121 */ | |
122 | |
123 #define OPAQUE_BLIT(to, from, length, bpp, alpha) \ | |
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124 PIXEL_COPY(to, from, length, bpp) |
0 | 125 |
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126 #ifdef MMX_ASMBLIT |
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127 |
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128 #define ALPHA_BLIT32_888MMX(to, from, length, bpp, alpha) \ |
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129 do { \ |
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130 Uint32 *srcp = (Uint32 *)(from); \ |
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131 Uint32 *dstp = (Uint32 *)(to); \ |
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132 int i = 0x00FF00FF; \ |
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133 movd_m2r(*(&i), mm3); \ |
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134 punpckldq_r2r(mm3, mm3); \ |
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135 i = 0xFF000000; \ |
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136 movd_m2r(*(&i), mm7); \ |
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137 punpckldq_r2r(mm7, mm7); \ |
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138 i = alpha | alpha << 16; \ |
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139 movd_m2r(*(&i), mm4); \ |
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140 punpckldq_r2r(mm4, mm4); \ |
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141 pcmpeqd_r2r(mm5,mm5); /* set mm5 to "1" */ \ |
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142 pxor_r2r(mm7, mm5); /* make clear alpha mask */ \ |
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143 i = length; \ |
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144 if(i & 1) { \ |
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145 movd_m2r((*srcp), mm1); /* src -> mm1 */ \ |
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146 punpcklbw_r2r(mm1, mm1); \ |
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147 pand_r2r(mm3, mm1); \ |
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148 movd_m2r((*dstp), mm2); /* dst -> mm2 */ \ |
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149 punpcklbw_r2r(mm2, mm2); \ |
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150 pand_r2r(mm3, mm2); \ |
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151 psubw_r2r(mm2, mm1); \ |
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152 pmullw_r2r(mm4, mm1); \ |
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153 psrlw_i2r(8, mm1); \ |
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154 paddw_r2r(mm1, mm2); \ |
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155 pand_r2r(mm3, mm2); \ |
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156 packuswb_r2r(mm2, mm2); \ |
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157 pand_r2r(mm5, mm2); /* 00000RGB -> mm2 */ \ |
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158 movd_r2m(mm2, *dstp); \ |
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159 ++srcp; \ |
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160 ++dstp; \ |
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161 i--; \ |
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162 } \ |
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163 for(; i > 0; --i) { \ |
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164 movq_m2r((*srcp), mm0); \ |
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165 movq_r2r(mm0, mm1); \ |
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166 punpcklbw_r2r(mm0, mm0); \ |
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167 movq_m2r((*dstp), mm2); \ |
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168 punpckhbw_r2r(mm1, mm1); \ |
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169 movq_r2r(mm2, mm6); \ |
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170 pand_r2r(mm3, mm0); \ |
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171 punpcklbw_r2r(mm2, mm2); \ |
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172 pand_r2r(mm3, mm1); \ |
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173 punpckhbw_r2r(mm6, mm6); \ |
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174 pand_r2r(mm3, mm2); \ |
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175 psubw_r2r(mm2, mm0); \ |
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176 pmullw_r2r(mm4, mm0); \ |
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177 pand_r2r(mm3, mm6); \ |
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178 psubw_r2r(mm6, mm1); \ |
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179 pmullw_r2r(mm4, mm1); \ |
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180 psrlw_i2r(8, mm0); \ |
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181 paddw_r2r(mm0, mm2); \ |
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182 psrlw_i2r(8, mm1); \ |
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183 paddw_r2r(mm1, mm6); \ |
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184 pand_r2r(mm3, mm2); \ |
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185 pand_r2r(mm3, mm6); \ |
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186 packuswb_r2r(mm2, mm2); \ |
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187 packuswb_r2r(mm6, mm6); \ |
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188 psrlq_i2r(32, mm2); \ |
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189 psllq_i2r(32, mm6); \ |
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190 por_r2r(mm6, mm2); \ |
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191 pand_r2r(mm5, mm2); /* 00000RGB -> mm2 */ \ |
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192 movq_r2m(mm2, *dstp); \ |
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193 srcp += 2; \ |
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194 dstp += 2; \ |
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195 i--; \ |
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196 } \ |
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197 emms(); \ |
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198 } while(0) |
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199 |
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200 #define ALPHA_BLIT16_565MMX(to, from, length, bpp, alpha) \ |
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201 do { \ |
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202 int i, n = 0; \ |
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203 Uint16 *srcp = (Uint16 *)(from); \ |
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204 Uint16 *dstp = (Uint16 *)(to); \ |
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205 Uint32 ALPHA = 0xF800; \ |
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206 movd_m2r(*(&ALPHA), mm1); \ |
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207 punpcklwd_r2r(mm1, mm1); \ |
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208 punpcklwd_r2r(mm1, mm1); \ |
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209 ALPHA = 0x07E0; \ |
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210 movd_m2r(*(&ALPHA), mm4); \ |
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211 punpcklwd_r2r(mm4, mm4); \ |
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212 punpcklwd_r2r(mm4, mm4); \ |
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213 ALPHA = 0x001F; \ |
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214 movd_m2r(*(&ALPHA), mm7); \ |
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215 punpcklwd_r2r(mm7, mm7); \ |
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216 punpcklwd_r2r(mm7, mm7); \ |
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217 alpha &= ~(1+2+4); \ |
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218 i = (Uint32)alpha | (Uint32)alpha << 16; \ |
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219 movd_m2r(*(&i), mm0); \ |
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220 punpckldq_r2r(mm0, mm0); \ |
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221 ALPHA = alpha >> 3; \ |
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222 i = ((int)(length) & 3); \ |
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223 for(; i > 0; --i) { \ |
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224 Uint32 s = *srcp++; \ |
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225 Uint32 d = *dstp; \ |
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226 s = (s | s << 16) & 0x07e0f81f; \ |
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227 d = (d | d << 16) & 0x07e0f81f; \ |
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228 d += (s - d) * ALPHA >> 5; \ |
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229 d &= 0x07e0f81f; \ |
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230 *dstp++ = d | d >> 16; \ |
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231 n++; \ |
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232 } \ |
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233 i = (int)(length) - n; \ |
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234 for(; i > 0; --i) { \ |
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235 movq_m2r((*dstp), mm3); \ |
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236 movq_m2r((*srcp), mm2); \ |
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237 movq_r2r(mm2, mm5); \ |
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238 pand_r2r(mm1 , mm5); \ |
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239 psrlq_i2r(11, mm5); \ |
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240 movq_r2r(mm3, mm6); \ |
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241 pand_r2r(mm1 , mm6); \ |
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242 psrlq_i2r(11, mm6); \ |
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243 psubw_r2r(mm6, mm5); \ |
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244 pmullw_r2r(mm0, mm5); \ |
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245 psrlw_i2r(8, mm5); \ |
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246 paddw_r2r(mm5, mm6); \ |
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247 psllq_i2r(11, mm6); \ |
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248 pand_r2r(mm1, mm6); \ |
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249 movq_r2r(mm4, mm5); \ |
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250 por_r2r(mm7, mm5); \ |
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251 pand_r2r(mm5, mm3); \ |
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252 por_r2r(mm6, mm3); \ |
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253 movq_r2r(mm2, mm5); \ |
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254 pand_r2r(mm4 , mm5); \ |
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255 psrlq_i2r(5, mm5); \ |
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256 movq_r2r(mm3, mm6); \ |
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257 pand_r2r(mm4 , mm6); \ |
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258 psrlq_i2r(5, mm6); \ |
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259 psubw_r2r(mm6, mm5); \ |
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260 pmullw_r2r(mm0, mm5); \ |
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261 psrlw_i2r(8, mm5); \ |
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262 paddw_r2r(mm5, mm6); \ |
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263 psllq_i2r(5, mm6); \ |
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264 pand_r2r(mm4, mm6); \ |
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265 movq_r2r(mm1, mm5); \ |
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266 por_r2r(mm7, mm5); \ |
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267 pand_r2r(mm5, mm3); \ |
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268 por_r2r(mm6, mm3); \ |
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269 movq_r2r(mm2, mm5); \ |
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270 pand_r2r(mm7 , mm5); \ |
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271 movq_r2r(mm3, mm6); \ |
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272 pand_r2r(mm7 , mm6); \ |
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273 psubw_r2r(mm6, mm5); \ |
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274 pmullw_r2r(mm0, mm5); \ |
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275 psrlw_i2r(8, mm5); \ |
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276 paddw_r2r(mm5, mm6); \ |
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277 pand_r2r(mm7, mm6); \ |
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278 movq_r2r(mm1, mm5); \ |
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279 por_r2r(mm4, mm5); \ |
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280 pand_r2r(mm5, mm3); \ |
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281 por_r2r(mm6, mm3); \ |
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282 movq_r2m(mm3, *dstp); \ |
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283 srcp += 4; \ |
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284 dstp += 4; \ |
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285 i -= 3; \ |
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286 } \ |
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287 emms(); \ |
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288 } while(0) |
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289 |
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290 #define ALPHA_BLIT16_555MMX(to, from, length, bpp, alpha) \ |
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291 do { \ |
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292 int i, n = 0; \ |
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293 Uint16 *srcp = (Uint16 *)(from); \ |
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294 Uint16 *dstp = (Uint16 *)(to); \ |
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295 Uint32 ALPHA = 0x7C00; \ |
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296 movd_m2r(*(&ALPHA), mm1); \ |
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297 punpcklwd_r2r(mm1, mm1); \ |
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298 punpcklwd_r2r(mm1, mm1); \ |
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299 ALPHA = 0x03E0; \ |
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300 movd_m2r(*(&ALPHA), mm4); \ |
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301 punpcklwd_r2r(mm4, mm4); \ |
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302 punpcklwd_r2r(mm4, mm4); \ |
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303 ALPHA = 0x001F; \ |
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304 movd_m2r(*(&ALPHA), mm7); \ |
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305 punpcklwd_r2r(mm7, mm7); \ |
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306 punpcklwd_r2r(mm7, mm7); \ |
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307 alpha &= ~(1+2+4); \ |
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308 i = (Uint32)alpha | (Uint32)alpha << 16; \ |
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309 movd_m2r(*(&i), mm0); \ |
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310 punpckldq_r2r(mm0, mm0); \ |
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311 i = ((int)(length) & 3); \ |
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312 ALPHA = alpha >> 3; \ |
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313 for(; i > 0; --i) { \ |
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314 Uint32 s = *srcp++; \ |
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315 Uint32 d = *dstp; \ |
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316 s = (s | s << 16) & 0x03e07c1f; \ |
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317 d = (d | d << 16) & 0x03e07c1f; \ |
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318 d += (s - d) * ALPHA >> 5; \ |
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319 d &= 0x03e07c1f; \ |
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320 *dstp++ = d | d >> 16; \ |
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321 n++; \ |
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322 } \ |
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323 i = (int)(length) - n; \ |
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324 for(; i > 0; --i) { \ |
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325 movq_m2r((*dstp), mm3); \ |
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326 movq_m2r((*srcp), mm2); \ |
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327 movq_r2r(mm2, mm5); \ |
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328 pand_r2r(mm1 , mm5); \ |
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329 psrlq_i2r(10, mm5); \ |
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330 movq_r2r(mm3, mm6); \ |
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331 pand_r2r(mm1 , mm6); \ |
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332 psrlq_i2r(10, mm6); \ |
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333 psubw_r2r(mm6, mm5); \ |
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334 pmullw_r2r(mm0, mm5); \ |
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335 psrlw_i2r(8, mm5); \ |
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336 paddw_r2r(mm5, mm6); \ |
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337 psllq_i2r(10, mm6); \ |
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338 pand_r2r(mm1, mm6); \ |
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339 movq_r2r(mm4, mm5); \ |
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340 por_r2r(mm7, mm5); \ |
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341 pand_r2r(mm5, mm3); \ |
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342 por_r2r(mm6, mm3); \ |
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343 movq_r2r(mm2, mm5); \ |
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344 pand_r2r(mm4 , mm5); \ |
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345 psrlq_i2r(5, mm5); \ |
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346 movq_r2r(mm3, mm6); \ |
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347 pand_r2r(mm4 , mm6); \ |
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348 psrlq_i2r(5, mm6); \ |
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349 psubw_r2r(mm6, mm5); \ |
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350 pmullw_r2r(mm0, mm5); \ |
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351 psrlw_i2r(8, mm5); \ |
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352 paddw_r2r(mm5, mm6); \ |
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353 psllq_i2r(5, mm6); \ |
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354 pand_r2r(mm4, mm6); \ |
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355 movq_r2r(mm1, mm5); \ |
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356 por_r2r(mm7, mm5); \ |
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357 pand_r2r(mm5, mm3); \ |
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358 por_r2r(mm6, mm3); \ |
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359 movq_r2r(mm2, mm5); \ |
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360 pand_r2r(mm7 , mm5); \ |
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361 movq_r2r(mm3, mm6); \ |
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362 pand_r2r(mm7 , mm6); \ |
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363 psubw_r2r(mm6, mm5); \ |
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364 pmullw_r2r(mm0, mm5); \ |
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365 psrlw_i2r(8, mm5); \ |
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366 paddw_r2r(mm5, mm6); \ |
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367 pand_r2r(mm7, mm6); \ |
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368 movq_r2r(mm1, mm5); \ |
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369 por_r2r(mm4, mm5); \ |
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370 pand_r2r(mm5, mm3); \ |
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371 por_r2r(mm6, mm3); \ |
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372 movq_r2m(mm3, *dstp); \ |
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373 srcp += 4; \ |
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374 dstp += 4; \ |
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375 i -= 3; \ |
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376 } \ |
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377 emms(); \ |
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378 } while(0) |
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379 |
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380 #endif |
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381 |
0 | 382 /* |
383 * For 32bpp pixels on the form 0x00rrggbb: | |
384 * If we treat the middle component separately, we can process the two | |
385 * remaining in parallel. This is safe to do because of the gap to the left | |
386 * of each component, so the bits from the multiplication don't collide. | |
387 * This can be used for any RGB permutation of course. | |
388 */ | |
389 #define ALPHA_BLIT32_888(to, from, length, bpp, alpha) \ | |
390 do { \ | |
391 int i; \ | |
392 Uint32 *src = (Uint32 *)(from); \ | |
393 Uint32 *dst = (Uint32 *)(to); \ | |
394 for(i = 0; i < (int)(length); i++) { \ | |
395 Uint32 s = *src++; \ | |
396 Uint32 d = *dst; \ | |
397 Uint32 s1 = s & 0xff00ff; \ | |
398 Uint32 d1 = d & 0xff00ff; \ | |
399 d1 = (d1 + ((s1 - d1) * alpha >> 8)) & 0xff00ff; \ | |
400 s &= 0xff00; \ | |
401 d &= 0xff00; \ | |
402 d = (d + ((s - d) * alpha >> 8)) & 0xff00; \ | |
403 *dst++ = d1 | d; \ | |
404 } \ | |
405 } while(0) | |
406 | |
407 /* | |
408 * For 16bpp pixels we can go a step further: put the middle component | |
409 * in the high 16 bits of a 32 bit word, and process all three RGB | |
410 * components at the same time. Since the smallest gap is here just | |
411 * 5 bits, we have to scale alpha down to 5 bits as well. | |
412 */ | |
413 #define ALPHA_BLIT16_565(to, from, length, bpp, alpha) \ | |
414 do { \ | |
415 int i; \ | |
416 Uint16 *src = (Uint16 *)(from); \ | |
417 Uint16 *dst = (Uint16 *)(to); \ | |
689
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418 Uint32 ALPHA = alpha >> 3; \ |
0 | 419 for(i = 0; i < (int)(length); i++) { \ |
420 Uint32 s = *src++; \ | |
421 Uint32 d = *dst; \ | |
422 s = (s | s << 16) & 0x07e0f81f; \ | |
423 d = (d | d << 16) & 0x07e0f81f; \ | |
689
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424 d += (s - d) * ALPHA >> 5; \ |
0 | 425 d &= 0x07e0f81f; \ |
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426 *dst++ = (Uint16)(d | d >> 16); \ |
0 | 427 } \ |
428 } while(0) | |
429 | |
430 #define ALPHA_BLIT16_555(to, from, length, bpp, alpha) \ | |
431 do { \ | |
432 int i; \ | |
433 Uint16 *src = (Uint16 *)(from); \ | |
434 Uint16 *dst = (Uint16 *)(to); \ | |
689
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435 Uint32 ALPHA = alpha >> 3; \ |
0 | 436 for(i = 0; i < (int)(length); i++) { \ |
437 Uint32 s = *src++; \ | |
438 Uint32 d = *dst; \ | |
439 s = (s | s << 16) & 0x03e07c1f; \ | |
440 d = (d | d << 16) & 0x03e07c1f; \ | |
689
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441 d += (s - d) * ALPHA >> 5; \ |
0 | 442 d &= 0x03e07c1f; \ |
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443 *dst++ = (Uint16)(d | d >> 16); \ |
0 | 444 } \ |
445 } while(0) | |
446 | |
447 /* | |
448 * The general slow catch-all function, for remaining depths and formats | |
449 */ | |
450 #define ALPHA_BLIT_ANY(to, from, length, bpp, alpha) \ | |
451 do { \ | |
452 int i; \ | |
453 Uint8 *src = from; \ | |
454 Uint8 *dst = to; \ | |
455 for(i = 0; i < (int)(length); i++) { \ | |
456 Uint32 s, d; \ | |
457 unsigned rs, gs, bs, rd, gd, bd; \ | |
458 switch(bpp) { \ | |
459 case 2: \ | |
460 s = *(Uint16 *)src; \ | |
461 d = *(Uint16 *)dst; \ | |
462 break; \ | |
463 case 3: \ | |
464 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) { \ | |
465 s = (src[0] << 16) | (src[1] << 8) | src[2]; \ | |
466 d = (dst[0] << 16) | (dst[1] << 8) | dst[2]; \ | |
467 } else { \ | |
468 s = (src[2] << 16) | (src[1] << 8) | src[0]; \ | |
469 d = (dst[2] << 16) | (dst[1] << 8) | dst[0]; \ | |
470 } \ | |
471 break; \ | |
472 case 4: \ | |
473 s = *(Uint32 *)src; \ | |
474 d = *(Uint32 *)dst; \ | |
475 break; \ | |
476 } \ | |
477 RGB_FROM_PIXEL(s, fmt, rs, gs, bs); \ | |
478 RGB_FROM_PIXEL(d, fmt, rd, gd, bd); \ | |
479 rd += (rs - rd) * alpha >> 8; \ | |
480 gd += (gs - gd) * alpha >> 8; \ | |
481 bd += (bs - bd) * alpha >> 8; \ | |
482 PIXEL_FROM_RGB(d, fmt, rd, gd, bd); \ | |
483 switch(bpp) { \ | |
484 case 2: \ | |
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485 *(Uint16 *)dst = (Uint16)d; \ |
0 | 486 break; \ |
487 case 3: \ | |
488 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) { \ | |
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489 dst[0] = (Uint8)(d >> 16); \ |
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490 dst[1] = (Uint8)(d >> 8); \ |
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491 dst[2] = (Uint8)(d); \ |
0 | 492 } else { \ |
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493 dst[0] = (Uint8)d; \ |
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494 dst[1] = (Uint8)(d >> 8); \ |
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495 dst[2] = (Uint8)(d >> 16); \ |
0 | 496 } \ |
497 break; \ | |
498 case 4: \ | |
499 *(Uint32 *)dst = d; \ | |
500 break; \ | |
501 } \ | |
502 src += bpp; \ | |
503 dst += bpp; \ | |
504 } \ | |
505 } while(0) | |
506 | |
880
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507 #ifdef MMX_ASMBLIT |
0 | 508 |
689
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509 #define ALPHA_BLIT32_888_50MMX(to, from, length, bpp, alpha) \ |
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510 do { \ |
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511 Uint32 *srcp = (Uint32 *)(from); \ |
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512 Uint32 *dstp = (Uint32 *)(to); \ |
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513 int i = 0x00fefefe; \ |
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514 movd_m2r(*(&i), mm4); \ |
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515 punpckldq_r2r(mm4, mm4); \ |
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516 i = 0x00010101; \ |
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517 movd_m2r(*(&i), mm3); \ |
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518 punpckldq_r2r(mm3, mm3); \ |
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519 i = (int)(length); \ |
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520 if( i & 1 ) { \ |
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521 Uint32 s = *srcp++; \ |
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522 Uint32 d = *dstp; \ |
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523 *dstp++ = (((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) \ |
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524 + (s & d & 0x00010101); \ |
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525 i--; \ |
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526 } \ |
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527 for(; i > 0; --i) { \ |
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528 movq_m2r((*dstp), mm2); /* dst -> mm2 */ \ |
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529 movq_r2r(mm2, mm6); /* dst -> mm6 */ \ |
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530 movq_m2r((*srcp), mm1); /* src -> mm1 */ \ |
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Sam Lantinga <slouken@libsdl.org>
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531 movq_r2r(mm1, mm5); /* src -> mm5 */ \ |
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|
532 pand_r2r(mm4, mm6); /* dst & 0x00fefefe -> mm6 */ \ |
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533 pand_r2r(mm4, mm5); /* src & 0x00fefefe -> mm5 */ \ |
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534 paddd_r2r(mm6, mm5); /* (dst & 0x00fefefe) + (dst & 0x00fefefe) -> mm5 */ \ |
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535 psrld_i2r(1, mm5); \ |
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536 pand_r2r(mm1, mm2); /* s & d -> mm2 */ \ |
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537 pand_r2r(mm3, mm2); /* s & d & 0x00010101 -> mm2 */ \ |
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538 paddd_r2r(mm5, mm2); \ |
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539 movq_r2m(mm2, (*dstp)); \ |
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540 dstp += 2; \ |
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541 srcp += 2; \ |
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|
542 i--; \ |
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543 } \ |
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544 emms(); \ |
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545 } while(0) |
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546 |
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547 #endif |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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548 |
0 | 549 /* |
550 * Special case: 50% alpha (alpha=128) | |
551 * This is treated specially because it can be optimized very well, and | |
552 * since it is good for many cases of semi-translucency. | |
553 * The theory is to do all three components at the same time: | |
554 * First zero the lowest bit of each component, which gives us room to | |
555 * add them. Then shift right and add the sum of the lowest bits. | |
556 */ | |
557 #define ALPHA_BLIT32_888_50(to, from, length, bpp, alpha) \ | |
558 do { \ | |
559 int i; \ | |
560 Uint32 *src = (Uint32 *)(from); \ | |
561 Uint32 *dst = (Uint32 *)(to); \ | |
562 for(i = 0; i < (int)(length); i++) { \ | |
563 Uint32 s = *src++; \ | |
564 Uint32 d = *dst; \ | |
565 *dst++ = (((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) \ | |
566 + (s & d & 0x00010101); \ | |
567 } \ | |
568 } while(0) | |
569 | |
570 /* | |
571 * For 16bpp, we can actually blend two pixels in parallel, if we take | |
572 * care to shift before we add, not after. | |
573 */ | |
574 | |
575 /* helper: blend a single 16 bit pixel at 50% */ | |
576 #define BLEND16_50(dst, src, mask) \ | |
577 do { \ | |
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578 Uint32 s = *src++; \ |
0 | 579 Uint32 d = *dst; \ |
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580 *dst++ = (Uint16)((((s & mask) + (d & mask)) >> 1) + \ |
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581 (s & d & (~mask & 0xffff))); \ |
0 | 582 } while(0) |
583 | |
584 /* basic 16bpp blender. mask is the pixels to keep when adding. */ | |
585 #define ALPHA_BLIT16_50(to, from, length, bpp, alpha, mask) \ | |
586 do { \ | |
587 unsigned n = (length); \ | |
588 Uint16 *src = (Uint16 *)(from); \ | |
589 Uint16 *dst = (Uint16 *)(to); \ | |
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84de7511f79f
Fixed a bunch of 64-bit compatibility problems
Sam Lantinga <slouken@libsdl.org>
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diff
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590 if(((uintptr_t)src ^ (uintptr_t)dst) & 3) { \ |
0 | 591 /* source and destination not in phase, blit one by one */ \ |
592 while(n--) \ | |
593 BLEND16_50(dst, src, mask); \ | |
594 } else { \ | |
1456
84de7511f79f
Fixed a bunch of 64-bit compatibility problems
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1428
diff
changeset
|
595 if((uintptr_t)src & 3) { \ |
0 | 596 /* first odd pixel */ \ |
597 BLEND16_50(dst, src, mask); \ | |
598 n--; \ | |
599 } \ | |
600 for(; n > 1; n -= 2) { \ | |
601 Uint32 s = *(Uint32 *)src; \ | |
602 Uint32 d = *(Uint32 *)dst; \ | |
603 *(Uint32 *)dst = ((s & (mask | mask << 16)) >> 1) \ | |
604 + ((d & (mask | mask << 16)) >> 1) \ | |
605 + (s & d & (~(mask | mask << 16))); \ | |
606 src += 2; \ | |
607 dst += 2; \ | |
608 } \ | |
609 if(n) \ | |
610 BLEND16_50(dst, src, mask); /* last odd pixel */ \ | |
611 } \ | |
612 } while(0) | |
613 | |
614 #define ALPHA_BLIT16_565_50(to, from, length, bpp, alpha) \ | |
615 ALPHA_BLIT16_50(to, from, length, bpp, alpha, 0xf7de) | |
616 | |
617 #define ALPHA_BLIT16_555_50(to, from, length, bpp, alpha) \ | |
618 ALPHA_BLIT16_50(to, from, length, bpp, alpha, 0xfbde) | |
619 | |
880
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620 #ifdef MMX_ASMBLIT |
0 | 621 |
622 #define CHOOSE_BLIT(blitter, alpha, fmt) \ | |
623 do { \ | |
624 if(alpha == 255) { \ | |
625 switch(fmt->BytesPerPixel) { \ | |
626 case 1: blitter(1, Uint8, OPAQUE_BLIT); break; \ | |
627 case 2: blitter(2, Uint8, OPAQUE_BLIT); break; \ | |
628 case 3: blitter(3, Uint8, OPAQUE_BLIT); break; \ | |
629 case 4: blitter(4, Uint16, OPAQUE_BLIT); break; \ | |
630 } \ | |
631 } else { \ | |
632 switch(fmt->BytesPerPixel) { \ | |
633 case 1: \ | |
634 /* No 8bpp alpha blitting */ \ | |
635 break; \ | |
636 \ | |
637 case 2: \ | |
638 switch(fmt->Rmask | fmt->Gmask | fmt->Bmask) { \ | |
639 case 0xffff: \ | |
640 if(fmt->Gmask == 0x07e0 \ | |
641 || fmt->Rmask == 0x07e0 \ | |
642 || fmt->Bmask == 0x07e0) { \ | |
643 if(alpha == 128) \ | |
644 blitter(2, Uint8, ALPHA_BLIT16_565_50); \ | |
645 else { \ | |
739
22dbf364c017
Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
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|
646 if(SDL_HasMMX()) \ |
689
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647 blitter(2, Uint8, ALPHA_BLIT16_565MMX); \ |
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648 else \ |
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649 blitter(2, Uint8, ALPHA_BLIT16_565); \ |
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650 } \ |
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651 } else \ |
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652 goto general16; \ |
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changeset
|
653 break; \ |
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diff
changeset
|
654 \ |
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changeset
|
655 case 0x7fff: \ |
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656 if(fmt->Gmask == 0x03e0 \ |
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657 || fmt->Rmask == 0x03e0 \ |
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658 || fmt->Bmask == 0x03e0) { \ |
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|
659 if(alpha == 128) \ |
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660 blitter(2, Uint8, ALPHA_BLIT16_555_50); \ |
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661 else { \ |
739
22dbf364c017
Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
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689
diff
changeset
|
662 if(SDL_HasMMX()) \ |
689
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663 blitter(2, Uint8, ALPHA_BLIT16_555MMX); \ |
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664 else \ |
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665 blitter(2, Uint8, ALPHA_BLIT16_555); \ |
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666 } \ |
5bb080d35049
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changeset
|
667 break; \ |
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changeset
|
668 } \ |
5bb080d35049
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changeset
|
669 /* fallthrough */ \ |
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670 \ |
5bb080d35049
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671 default: \ |
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changeset
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672 general16: \ |
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673 blitter(2, Uint8, ALPHA_BLIT_ANY); \ |
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674 } \ |
5bb080d35049
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|
675 break; \ |
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|
676 \ |
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677 case 3: \ |
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678 blitter(3, Uint8, ALPHA_BLIT_ANY); \ |
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|
679 break; \ |
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|
680 \ |
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|
681 case 4: \ |
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682 if((fmt->Rmask | fmt->Gmask | fmt->Bmask) == 0x00ffffff \ |
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|
683 && (fmt->Gmask == 0xff00 || fmt->Rmask == 0xff00 \ |
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684 || fmt->Bmask == 0xff00)) { \ |
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685 if(alpha == 128) \ |
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686 { \ |
739
22dbf364c017
Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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689
diff
changeset
|
687 if(SDL_HasMMX()) \ |
689
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688 blitter(4, Uint16, ALPHA_BLIT32_888_50MMX);\ |
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689 else \ |
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690 blitter(4, Uint16, ALPHA_BLIT32_888_50);\ |
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691 } \ |
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|
692 else \ |
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|
693 { \ |
739
22dbf364c017
Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
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689
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changeset
|
694 if(SDL_HasMMX()) \ |
689
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695 blitter(4, Uint16, ALPHA_BLIT32_888MMX);\ |
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696 else \ |
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697 blitter(4, Uint16, ALPHA_BLIT32_888); \ |
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698 } \ |
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|
699 } else \ |
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700 blitter(4, Uint16, ALPHA_BLIT_ANY); \ |
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|
701 break; \ |
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|
702 } \ |
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|
703 } \ |
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|
704 } while(0) |
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|
705 |
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706 #else |
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707 |
689
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708 #define CHOOSE_BLIT(blitter, alpha, fmt) \ |
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709 do { \ |
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diff
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|
710 if(alpha == 255) { \ |
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|
711 switch(fmt->BytesPerPixel) { \ |
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|
712 case 1: blitter(1, Uint8, OPAQUE_BLIT); break; \ |
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713 case 2: blitter(2, Uint8, OPAQUE_BLIT); break; \ |
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|
714 case 3: blitter(3, Uint8, OPAQUE_BLIT); break; \ |
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715 case 4: blitter(4, Uint16, OPAQUE_BLIT); break; \ |
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diff
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|
716 } \ |
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|
717 } else { \ |
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|
718 switch(fmt->BytesPerPixel) { \ |
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diff
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|
719 case 1: \ |
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diff
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|
720 /* No 8bpp alpha blitting */ \ |
5bb080d35049
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Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
721 break; \ |
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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diff
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|
722 \ |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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526
diff
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|
723 case 2: \ |
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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|
724 switch(fmt->Rmask | fmt->Gmask | fmt->Bmask) { \ |
5bb080d35049
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changeset
|
725 case 0xffff: \ |
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parents:
526
diff
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|
726 if(fmt->Gmask == 0x07e0 \ |
5bb080d35049
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|
727 || fmt->Rmask == 0x07e0 \ |
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diff
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|
728 || fmt->Bmask == 0x07e0) { \ |
5bb080d35049
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diff
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|
729 if(alpha == 128) \ |
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730 blitter(2, Uint8, ALPHA_BLIT16_565_50); \ |
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|
731 else { \ |
0 | 732 blitter(2, Uint8, ALPHA_BLIT16_565); \ |
733 } \ | |
734 } else \ | |
735 goto general16; \ | |
736 break; \ | |
737 \ | |
738 case 0x7fff: \ | |
739 if(fmt->Gmask == 0x03e0 \ | |
740 || fmt->Rmask == 0x03e0 \ | |
741 || fmt->Bmask == 0x03e0) { \ | |
742 if(alpha == 128) \ | |
743 blitter(2, Uint8, ALPHA_BLIT16_555_50); \ | |
744 else { \ | |
745 blitter(2, Uint8, ALPHA_BLIT16_555); \ | |
746 } \ | |
747 break; \ | |
748 } \ | |
749 /* fallthrough */ \ | |
750 \ | |
751 default: \ | |
752 general16: \ | |
753 blitter(2, Uint8, ALPHA_BLIT_ANY); \ | |
754 } \ | |
755 break; \ | |
756 \ | |
757 case 3: \ | |
758 blitter(3, Uint8, ALPHA_BLIT_ANY); \ | |
759 break; \ | |
760 \ | |
761 case 4: \ | |
762 if((fmt->Rmask | fmt->Gmask | fmt->Bmask) == 0x00ffffff \ | |
763 && (fmt->Gmask == 0xff00 || fmt->Rmask == 0xff00 \ | |
764 || fmt->Bmask == 0xff00)) { \ | |
765 if(alpha == 128) \ | |
766 blitter(4, Uint16, ALPHA_BLIT32_888_50); \ | |
767 else \ | |
768 blitter(4, Uint16, ALPHA_BLIT32_888); \ | |
769 } else \ | |
770 blitter(4, Uint16, ALPHA_BLIT_ANY); \ | |
771 break; \ | |
772 } \ | |
773 } \ | |
774 } while(0) | |
775 | |
689
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|
776 #endif |
0 | 777 |
778 /* | |
779 * This takes care of the case when the surface is clipped on the left and/or | |
780 * right. Top clipping has already been taken care of. | |
781 */ | |
1895
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diff
changeset
|
782 static void |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
783 RLEClipBlit(int w, Uint8 * srcbuf, SDL_Surface * dst, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
784 Uint8 * dstbuf, SDL_Rect * srcrect, unsigned alpha) |
0 | 785 { |
786 SDL_PixelFormat *fmt = dst->format; | |
787 | |
788 #define RLECLIPBLIT(bpp, Type, do_blit) \ | |
789 do { \ | |
790 int linecount = srcrect->h; \ | |
791 int ofs = 0; \ | |
792 int left = srcrect->x; \ | |
793 int right = left + srcrect->w; \ | |
794 dstbuf -= left * bpp; \ | |
795 for(;;) { \ | |
796 int run; \ | |
797 ofs += *(Type *)srcbuf; \ | |
798 run = ((Type *)srcbuf)[1]; \ | |
799 srcbuf += 2 * sizeof(Type); \ | |
800 if(run) { \ | |
801 /* clip to left and right borders */ \ | |
802 if(ofs < right) { \ | |
803 int start = 0; \ | |
804 int len = run; \ | |
805 int startcol; \ | |
806 if(left - ofs > 0) { \ | |
807 start = left - ofs; \ | |
808 len -= start; \ | |
809 if(len <= 0) \ | |
810 goto nocopy ## bpp ## do_blit; \ | |
811 } \ | |
812 startcol = ofs + start; \ | |
813 if(len > right - startcol) \ | |
814 len = right - startcol; \ | |
815 do_blit(dstbuf + startcol * bpp, srcbuf + start * bpp, \ | |
816 len, bpp, alpha); \ | |
817 } \ | |
818 nocopy ## bpp ## do_blit: \ | |
819 srcbuf += run * bpp; \ | |
820 ofs += run; \ | |
821 } else if(!ofs) \ | |
822 break; \ | |
823 if(ofs == w) { \ | |
824 ofs = 0; \ | |
825 dstbuf += dst->pitch; \ | |
826 if(!--linecount) \ | |
827 break; \ | |
828 } \ | |
829 } \ | |
830 } while(0) | |
831 | |
832 CHOOSE_BLIT(RLECLIPBLIT, alpha, fmt); | |
833 | |
834 #undef RLECLIPBLIT | |
835 | |
836 } | |
837 | |
838 | |
839 /* blit a colorkeyed RLE surface */ | |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
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|
840 int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
841 SDL_RLEBlit(SDL_Surface * src, SDL_Rect * srcrect, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
842 SDL_Surface * dst, SDL_Rect * dstrect) |
0 | 843 { |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
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|
844 Uint8 *dstbuf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
845 Uint8 *srcbuf; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
846 int x, y; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
847 int w = src->w; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
848 unsigned alpha; |
0 | 849 |
1895
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|
850 /* Lock the destination if necessary */ |
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|
851 if (SDL_MUSTLOCK(dst)) { |
c121d94672cb
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|
852 if (SDL_LockSurface(dst) < 0) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
853 return (-1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
854 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
855 } |
0 | 856 |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
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|
857 /* Set up the source and destination pointers */ |
c121d94672cb
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858 x = dstrect->x; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
859 y = dstrect->y; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
860 dstbuf = (Uint8 *) dst->pixels |
c121d94672cb
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|
861 + y * dst->pitch + x * src->format->BytesPerPixel; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
862 srcbuf = (Uint8 *) src->map->sw_data->aux_data; |
0 | 863 |
1895
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diff
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|
864 { |
c121d94672cb
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|
865 /* skip lines at the top if neccessary */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
866 int vskip = srcrect->y; |
c121d94672cb
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|
867 int ofs = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
868 if (vskip) { |
0 | 869 |
870 #define RLESKIP(bpp, Type) \ | |
871 for(;;) { \ | |
872 int run; \ | |
873 ofs += *(Type *)srcbuf; \ | |
874 run = ((Type *)srcbuf)[1]; \ | |
875 srcbuf += sizeof(Type) * 2; \ | |
876 if(run) { \ | |
877 srcbuf += run * bpp; \ | |
878 ofs += run; \ | |
879 } else if(!ofs) \ | |
880 goto done; \ | |
881 if(ofs == w) { \ | |
882 ofs = 0; \ | |
883 if(!--vskip) \ | |
884 break; \ | |
885 } \ | |
886 } | |
887 | |
1895
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|
888 switch (src->format->BytesPerPixel) { |
c121d94672cb
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|
889 case 1: |
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|
890 RLESKIP(1, Uint8); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
891 break; |
c121d94672cb
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diff
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|
892 case 2: |
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893 RLESKIP(2, Uint8); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
894 break; |
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changeset
|
895 case 3: |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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896 RLESKIP(3, Uint8); |
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|
897 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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898 case 4: |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
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899 RLESKIP(4, Uint16); |
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900 break; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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901 } |
0 | 902 |
903 #undef RLESKIP | |
904 | |
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905 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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906 } |
0 | 907 |
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908 alpha = (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA |
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909 ? src->format->alpha : 255; |
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910 /* if left or right edge clipping needed, call clip blit */ |
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911 if (srcrect->x || srcrect->w != src->w) { |
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912 RLEClipBlit(w, srcbuf, dst, dstbuf, srcrect, alpha); |
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913 } else { |
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914 SDL_PixelFormat *fmt = src->format; |
0 | 915 |
916 #define RLEBLIT(bpp, Type, do_blit) \ | |
917 do { \ | |
918 int linecount = srcrect->h; \ | |
919 int ofs = 0; \ | |
920 for(;;) { \ | |
921 unsigned run; \ | |
922 ofs += *(Type *)srcbuf; \ | |
923 run = ((Type *)srcbuf)[1]; \ | |
924 srcbuf += 2 * sizeof(Type); \ | |
925 if(run) { \ | |
926 do_blit(dstbuf + ofs * bpp, srcbuf, run, bpp, alpha); \ | |
927 srcbuf += run * bpp; \ | |
928 ofs += run; \ | |
929 } else if(!ofs) \ | |
930 break; \ | |
931 if(ofs == w) { \ | |
932 ofs = 0; \ | |
933 dstbuf += dst->pitch; \ | |
934 if(!--linecount) \ | |
935 break; \ | |
936 } \ | |
937 } \ | |
938 } while(0) | |
939 | |
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940 CHOOSE_BLIT(RLEBLIT, alpha, fmt); |
0 | 941 |
942 #undef RLEBLIT | |
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943 } |
0 | 944 |
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945 done: |
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946 /* Unlock the destination if necessary */ |
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947 if (SDL_MUSTLOCK(dst)) { |
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948 SDL_UnlockSurface(dst); |
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949 } |
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950 return (0); |
0 | 951 } |
952 | |
953 #undef OPAQUE_BLIT | |
954 | |
955 /* | |
956 * Per-pixel blitting macros for translucent pixels: | |
957 * These use the same techniques as the per-surface blitting macros | |
958 */ | |
959 | |
960 /* | |
961 * For 32bpp pixels, we have made sure the alpha is stored in the top | |
962 * 8 bits, so proceed as usual | |
963 */ | |
964 #define BLIT_TRANSL_888(src, dst) \ | |
965 do { \ | |
966 Uint32 s = src; \ | |
967 Uint32 d = dst; \ | |
968 unsigned alpha = s >> 24; \ | |
969 Uint32 s1 = s & 0xff00ff; \ | |
970 Uint32 d1 = d & 0xff00ff; \ | |
971 d1 = (d1 + ((s1 - d1) * alpha >> 8)) & 0xff00ff; \ | |
972 s &= 0xff00; \ | |
973 d &= 0xff00; \ | |
974 d = (d + ((s - d) * alpha >> 8)) & 0xff00; \ | |
975 dst = d1 | d; \ | |
976 } while(0) | |
977 | |
978 /* | |
979 * For 16bpp pixels, we have stored the 5 most significant alpha bits in | |
980 * bits 5-10. As before, we can process all 3 RGB components at the same time. | |
981 */ | |
982 #define BLIT_TRANSL_565(src, dst) \ | |
983 do { \ | |
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984 Uint32 s = src; \ |
0 | 985 Uint32 d = dst; \ |
986 unsigned alpha = (s & 0x3e0) >> 5; \ | |
987 s &= 0x07e0f81f; \ | |
988 d = (d | d << 16) & 0x07e0f81f; \ | |
989 d += (s - d) * alpha >> 5; \ | |
990 d &= 0x07e0f81f; \ | |
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991 dst = (Uint16)(d | d >> 16); \ |
0 | 992 } while(0) |
993 | |
994 #define BLIT_TRANSL_555(src, dst) \ | |
995 do { \ | |
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996 Uint32 s = src; \ |
0 | 997 Uint32 d = dst; \ |
998 unsigned alpha = (s & 0x3e0) >> 5; \ | |
999 s &= 0x03e07c1f; \ | |
1000 d = (d | d << 16) & 0x03e07c1f; \ | |
1001 d += (s - d) * alpha >> 5; \ | |
1002 d &= 0x03e07c1f; \ | |
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1003 dst = (Uint16)(d | d >> 16); \ |
0 | 1004 } while(0) |
1005 | |
1006 /* used to save the destination format in the encoding. Designed to be | |
1007 macro-compatible with SDL_PixelFormat but without the unneeded fields */ | |
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1008 typedef struct |
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1009 { |
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1010 Uint8 BytesPerPixel; |
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1011 Uint8 Rloss; |
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1012 Uint8 Gloss; |
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1013 Uint8 Bloss; |
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1014 Uint8 Rshift; |
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1015 Uint8 Gshift; |
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1016 Uint8 Bshift; |
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1017 Uint8 Ashift; |
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1018 Uint32 Rmask; |
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1019 Uint32 Gmask; |
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1020 Uint32 Bmask; |
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1021 Uint32 Amask; |
0 | 1022 } RLEDestFormat; |
1023 | |
1024 /* blit a pixel-alpha RLE surface clipped at the right and/or left edges */ | |
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1025 static void |
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1026 RLEAlphaClipBlit(int w, Uint8 * srcbuf, SDL_Surface * dst, |
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1027 Uint8 * dstbuf, SDL_Rect * srcrect) |
0 | 1028 { |
1029 SDL_PixelFormat *df = dst->format; | |
1030 /* | |
1031 * clipped blitter: Ptype is the destination pixel type, | |
1032 * Ctype the translucent count type, and do_blend the macro | |
1033 * to blend one pixel. | |
1034 */ | |
1035 #define RLEALPHACLIPBLIT(Ptype, Ctype, do_blend) \ | |
1036 do { \ | |
1037 int linecount = srcrect->h; \ | |
1038 int left = srcrect->x; \ | |
1039 int right = left + srcrect->w; \ | |
1040 dstbuf -= left * sizeof(Ptype); \ | |
1041 do { \ | |
1042 int ofs = 0; \ | |
1043 /* blit opaque pixels on one line */ \ | |
1044 do { \ | |
1045 unsigned run; \ | |
1046 ofs += ((Ctype *)srcbuf)[0]; \ | |
1047 run = ((Ctype *)srcbuf)[1]; \ | |
1048 srcbuf += 2 * sizeof(Ctype); \ | |
1049 if(run) { \ | |
1050 /* clip to left and right borders */ \ | |
1051 int cofs = ofs; \ | |
1052 int crun = run; \ | |
1053 if(left - cofs > 0) { \ | |
1054 crun -= left - cofs; \ | |
1055 cofs = left; \ | |
1056 } \ | |
1057 if(crun > right - cofs) \ | |
1058 crun = right - cofs; \ | |
1059 if(crun > 0) \ | |
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1060 PIXEL_COPY(dstbuf + cofs * sizeof(Ptype), \ |
0 | 1061 srcbuf + (cofs - ofs) * sizeof(Ptype), \ |
1
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1062 (unsigned)crun, sizeof(Ptype)); \ |
0 | 1063 srcbuf += run * sizeof(Ptype); \ |
1064 ofs += run; \ | |
1065 } else if(!ofs) \ | |
1066 return; \ | |
1067 } while(ofs < w); \ | |
1068 /* skip padding if necessary */ \ | |
1069 if(sizeof(Ptype) == 2) \ | |
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1070 srcbuf += (uintptr_t)srcbuf & 2; \ |
0 | 1071 /* blit translucent pixels on the same line */ \ |
1072 ofs = 0; \ | |
1073 do { \ | |
1074 unsigned run; \ | |
1075 ofs += ((Uint16 *)srcbuf)[0]; \ | |
1076 run = ((Uint16 *)srcbuf)[1]; \ | |
1077 srcbuf += 4; \ | |
1078 if(run) { \ | |
1079 /* clip to left and right borders */ \ | |
1080 int cofs = ofs; \ | |
1081 int crun = run; \ | |
1082 if(left - cofs > 0) { \ | |
1083 crun -= left - cofs; \ | |
1084 cofs = left; \ | |
1085 } \ | |
1086 if(crun > right - cofs) \ | |
1087 crun = right - cofs; \ | |
1088 if(crun > 0) { \ | |
1089 Ptype *dst = (Ptype *)dstbuf + cofs; \ | |
1090 Uint32 *src = (Uint32 *)srcbuf + (cofs - ofs); \ | |
1091 int i; \ | |
1092 for(i = 0; i < crun; i++) \ | |
1093 do_blend(src[i], dst[i]); \ | |
1094 } \ | |
1095 srcbuf += run * 4; \ | |
1096 ofs += run; \ | |
1097 } \ | |
1098 } while(ofs < w); \ | |
1099 dstbuf += dst->pitch; \ | |
1100 } while(--linecount); \ | |
1101 } while(0) | |
1102 | |
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1103 switch (df->BytesPerPixel) { |
0 | 1104 case 2: |
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1105 if (df->Gmask == 0x07e0 || df->Rmask == 0x07e0 || df->Bmask == 0x07e0) |
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1106 RLEALPHACLIPBLIT(Uint16, Uint8, BLIT_TRANSL_565); |
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1107 else |
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1108 RLEALPHACLIPBLIT(Uint16, Uint8, BLIT_TRANSL_555); |
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1109 break; |
0 | 1110 case 4: |
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1111 RLEALPHACLIPBLIT(Uint32, Uint16, BLIT_TRANSL_888); |
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1112 break; |
0 | 1113 } |
1114 } | |
1115 | |
1116 /* blit a pixel-alpha RLE surface */ | |
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1117 int |
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1118 SDL_RLEAlphaBlit(SDL_Surface * src, SDL_Rect * srcrect, |
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1119 SDL_Surface * dst, SDL_Rect * dstrect) |
0 | 1120 { |
1121 int x, y; | |
1122 int w = src->w; | |
1123 Uint8 *srcbuf, *dstbuf; | |
1124 SDL_PixelFormat *df = dst->format; | |
1125 | |
1126 /* Lock the destination if necessary */ | |
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1127 if (SDL_MUSTLOCK(dst)) { |
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1128 if (SDL_LockSurface(dst) < 0) { |
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1129 return -1; |
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1130 } |
0 | 1131 } |
1132 | |
1133 x = dstrect->x; | |
1134 y = dstrect->y; | |
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1135 dstbuf = (Uint8 *) dst->pixels + y * dst->pitch + x * df->BytesPerPixel; |
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1136 srcbuf = (Uint8 *) src->map->sw_data->aux_data + sizeof(RLEDestFormat); |
0 | 1137 |
1138 { | |
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1139 /* skip lines at the top if necessary */ |
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1140 int vskip = srcrect->y; |
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1141 if (vskip) { |
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1142 int ofs; |
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1143 if (df->BytesPerPixel == 2) { |
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1144 /* the 16/32 interleaved format */ |
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1145 do { |
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1146 /* skip opaque line */ |
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1147 ofs = 0; |
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1148 do { |
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1149 int run; |
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1150 ofs += srcbuf[0]; |
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1151 run = srcbuf[1]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1152 srcbuf += 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1153 if (run) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1154 srcbuf += 2 * run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1155 ofs += run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1156 } else if (!ofs) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1157 goto done; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1158 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1159 while (ofs < w); |
0 | 1160 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1161 /* skip padding */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1162 srcbuf += (uintptr_t) srcbuf & 2; |
0 | 1163 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1164 /* skip translucent line */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1165 ofs = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1166 do { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1167 int run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1168 ofs += ((Uint16 *) srcbuf)[0]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1169 run = ((Uint16 *) srcbuf)[1]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1170 srcbuf += 4 * (run + 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1171 ofs += run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1172 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1173 while (ofs < w); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1174 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1175 while (--vskip); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1176 } else { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1177 /* the 32/32 interleaved format */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1178 vskip <<= 1; /* opaque and translucent have same format */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1179 do { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1180 ofs = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1181 do { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1182 int run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1183 ofs += ((Uint16 *) srcbuf)[0]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1184 run = ((Uint16 *) srcbuf)[1]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1185 srcbuf += 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1186 if (run) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1187 srcbuf += 4 * run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1188 ofs += run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1189 } else if (!ofs) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1190 goto done; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1191 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1192 while (ofs < w); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1193 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1194 while (--vskip); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1195 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1196 } |
0 | 1197 } |
1198 | |
1199 /* if left or right edge clipping needed, call clip blit */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1200 if (srcrect->x || srcrect->w != src->w) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1201 RLEAlphaClipBlit(w, srcbuf, dst, dstbuf, srcrect); |
0 | 1202 } else { |
1203 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1204 /* |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1205 * non-clipped blitter. Ptype is the destination pixel type, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1206 * Ctype the translucent count type, and do_blend the |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1207 * macro to blend one pixel. |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1208 */ |
0 | 1209 #define RLEALPHABLIT(Ptype, Ctype, do_blend) \ |
1210 do { \ | |
1211 int linecount = srcrect->h; \ | |
1212 do { \ | |
1213 int ofs = 0; \ | |
1214 /* blit opaque pixels on one line */ \ | |
1215 do { \ | |
1216 unsigned run; \ | |
1217 ofs += ((Ctype *)srcbuf)[0]; \ | |
1218 run = ((Ctype *)srcbuf)[1]; \ | |
1219 srcbuf += 2 * sizeof(Ctype); \ | |
1220 if(run) { \ | |
1
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
1221 PIXEL_COPY(dstbuf + ofs * sizeof(Ptype), srcbuf, \ |
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
1222 run, sizeof(Ptype)); \ |
0 | 1223 srcbuf += run * sizeof(Ptype); \ |
1224 ofs += run; \ | |
1225 } else if(!ofs) \ | |
1226 goto done; \ | |
1227 } while(ofs < w); \ | |
1228 /* skip padding if necessary */ \ | |
1229 if(sizeof(Ptype) == 2) \ | |
1456
84de7511f79f
Fixed a bunch of 64-bit compatibility problems
Sam Lantinga <slouken@libsdl.org>
parents:
1428
diff
changeset
|
1230 srcbuf += (uintptr_t)srcbuf & 2; \ |
0 | 1231 /* blit translucent pixels on the same line */ \ |
1232 ofs = 0; \ | |
1233 do { \ | |
1234 unsigned run; \ | |
1235 ofs += ((Uint16 *)srcbuf)[0]; \ | |
1236 run = ((Uint16 *)srcbuf)[1]; \ | |
1237 srcbuf += 4; \ | |
1238 if(run) { \ | |
1239 Ptype *dst = (Ptype *)dstbuf + ofs; \ | |
1240 unsigned i; \ | |
1241 for(i = 0; i < run; i++) { \ | |
1242 Uint32 src = *(Uint32 *)srcbuf; \ | |
1243 do_blend(src, *dst); \ | |
1244 srcbuf += 4; \ | |
1245 dst++; \ | |
1246 } \ | |
1247 ofs += run; \ | |
1248 } \ | |
1249 } while(ofs < w); \ | |
1250 dstbuf += dst->pitch; \ | |
1251 } while(--linecount); \ | |
1252 } while(0) | |
1253 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1254 switch (df->BytesPerPixel) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1255 case 2: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1256 if (df->Gmask == 0x07e0 || df->Rmask == 0x07e0 |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1257 || df->Bmask == 0x07e0) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1258 RLEALPHABLIT(Uint16, Uint8, BLIT_TRANSL_565); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1259 else |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1260 RLEALPHABLIT(Uint16, Uint8, BLIT_TRANSL_555); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1261 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1262 case 4: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1263 RLEALPHABLIT(Uint32, Uint16, BLIT_TRANSL_888); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1264 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1265 } |
0 | 1266 } |
1267 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1268 done: |
0 | 1269 /* Unlock the destination if necessary */ |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1270 if (SDL_MUSTLOCK(dst)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1271 SDL_UnlockSurface(dst); |
0 | 1272 } |
1273 return 0; | |
1274 } | |
1275 | |
1276 /* | |
1277 * Auxiliary functions: | |
1278 * The encoding functions take 32bpp rgb + a, and | |
1279 * return the number of bytes copied to the destination. | |
1280 * The decoding functions copy to 32bpp rgb + a, and | |
1281 * return the number of bytes copied from the source. | |
1282 * These are only used in the encoder and un-RLE code and are therefore not | |
1283 * highly optimised. | |
1284 */ | |
1285 | |
1286 /* encode 32bpp rgb + a into 16bpp rgb, losing alpha */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1287 static int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1288 copy_opaque_16(void *dst, Uint32 * src, int n, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1289 SDL_PixelFormat * sfmt, SDL_PixelFormat * dfmt) |
0 | 1290 { |
1291 int i; | |
1292 Uint16 *d = dst; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1293 for (i = 0; i < n; i++) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1294 unsigned r, g, b; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1295 RGB_FROM_PIXEL(*src, sfmt, r, g, b); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1296 PIXEL_FROM_RGB(*d, dfmt, r, g, b); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1297 src++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1298 d++; |
0 | 1299 } |
1300 return n * 2; | |
1301 } | |
1302 | |
1303 /* decode opaque pixels from 16bpp to 32bpp rgb + a */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1304 static int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1305 uncopy_opaque_16(Uint32 * dst, void *src, int n, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1306 RLEDestFormat * sfmt, SDL_PixelFormat * dfmt) |
0 | 1307 { |
1308 int i; | |
1309 Uint16 *s = src; | |
1310 unsigned alpha = dfmt->Amask ? 255 : 0; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1311 for (i = 0; i < n; i++) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1312 unsigned r, g, b; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1313 RGB_FROM_PIXEL(*s, sfmt, r, g, b); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1314 PIXEL_FROM_RGBA(*dst, dfmt, r, g, b, alpha); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1315 s++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1316 dst++; |
0 | 1317 } |
1318 return n * 2; | |
1319 } | |
1320 | |
1321 | |
1322 | |
1323 /* encode 32bpp rgb + a into 32bpp G0RAB format for blitting into 565 */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1324 static int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1325 copy_transl_565(void *dst, Uint32 * src, int n, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1326 SDL_PixelFormat * sfmt, SDL_PixelFormat * dfmt) |
0 | 1327 { |
1328 int i; | |
1329 Uint32 *d = dst; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1330 for (i = 0; i < n; i++) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1331 unsigned r, g, b, a; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1332 Uint16 pix; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1333 RGBA_FROM_8888(*src, sfmt, r, g, b, a); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1334 PIXEL_FROM_RGB(pix, dfmt, r, g, b); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1335 *d = ((pix & 0x7e0) << 16) | (pix & 0xf81f) | ((a << 2) & 0x7e0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1336 src++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1337 d++; |
0 | 1338 } |
1339 return n * 4; | |
1340 } | |
1341 | |
1342 /* encode 32bpp rgb + a into 32bpp G0RAB format for blitting into 555 */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1343 static int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1344 copy_transl_555(void *dst, Uint32 * src, int n, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1345 SDL_PixelFormat * sfmt, SDL_PixelFormat * dfmt) |
0 | 1346 { |
1347 int i; | |
1348 Uint32 *d = dst; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1349 for (i = 0; i < n; i++) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1350 unsigned r, g, b, a; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1351 Uint16 pix; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1352 RGBA_FROM_8888(*src, sfmt, r, g, b, a); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1353 PIXEL_FROM_RGB(pix, dfmt, r, g, b); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1354 *d = ((pix & 0x3e0) << 16) | (pix & 0xfc1f) | ((a << 2) & 0x3e0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1355 src++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1356 d++; |
0 | 1357 } |
1358 return n * 4; | |
1359 } | |
1360 | |
1361 /* decode translucent pixels from 32bpp GORAB to 32bpp rgb + a */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1362 static int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1363 uncopy_transl_16(Uint32 * dst, void *src, int n, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1364 RLEDestFormat * sfmt, SDL_PixelFormat * dfmt) |
0 | 1365 { |
1366 int i; | |
1367 Uint32 *s = src; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1368 for (i = 0; i < n; i++) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1369 unsigned r, g, b, a; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1370 Uint32 pix = *s++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1371 a = (pix & 0x3e0) >> 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1372 pix = (pix & ~0x3e0) | pix >> 16; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1373 RGB_FROM_PIXEL(pix, sfmt, r, g, b); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1374 PIXEL_FROM_RGBA(*dst, dfmt, r, g, b, a); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1375 dst++; |
0 | 1376 } |
1377 return n * 4; | |
1378 } | |
1379 | |
1380 /* encode 32bpp rgba into 32bpp rgba, keeping alpha (dual purpose) */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1381 static int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1382 copy_32(void *dst, Uint32 * src, int n, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1383 SDL_PixelFormat * sfmt, SDL_PixelFormat * dfmt) |
0 | 1384 { |
1385 int i; | |
1386 Uint32 *d = dst; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1387 for (i = 0; i < n; i++) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1388 unsigned r, g, b, a; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1389 Uint32 pixel; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1390 RGBA_FROM_8888(*src, sfmt, r, g, b, a); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1391 PIXEL_FROM_RGB(pixel, dfmt, r, g, b); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1392 *d++ = pixel | a << 24; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1393 src++; |
0 | 1394 } |
1395 return n * 4; | |
1396 } | |
1397 | |
1398 /* decode 32bpp rgba into 32bpp rgba, keeping alpha (dual purpose) */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1399 static int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1400 uncopy_32(Uint32 * dst, void *src, int n, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1401 RLEDestFormat * sfmt, SDL_PixelFormat * dfmt) |
0 | 1402 { |
1403 int i; | |
1404 Uint32 *s = src; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1405 for (i = 0; i < n; i++) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1406 unsigned r, g, b, a; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1407 Uint32 pixel = *s++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1408 RGB_FROM_PIXEL(pixel, sfmt, r, g, b); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1409 a = pixel >> 24; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1410 PIXEL_FROM_RGBA(*dst, dfmt, r, g, b, a); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1411 dst++; |
0 | 1412 } |
1413 return n * 4; | |
1414 } | |
1415 | |
1416 #define ISOPAQUE(pixel, fmt) ((((pixel) & fmt->Amask) >> fmt->Ashift) == 255) | |
1417 | |
1418 #define ISTRANSL(pixel, fmt) \ | |
1419 ((unsigned)((((pixel) & fmt->Amask) >> fmt->Ashift) - 1U) < 254U) | |
1420 | |
1421 /* convert surface to be quickly alpha-blittable onto dest, if possible */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1422 static int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1423 RLEAlphaSurface(SDL_Surface * surface) |
0 | 1424 { |
1425 SDL_Surface *dest; | |
1426 SDL_PixelFormat *df; | |
1427 int maxsize = 0; | |
1428 int max_opaque_run; | |
1429 int max_transl_run = 65535; | |
1430 unsigned masksum; | |
1431 Uint8 *rlebuf, *dst; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1432 int (*copy_opaque) (void *, Uint32 *, int, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1433 SDL_PixelFormat *, SDL_PixelFormat *); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1434 int (*copy_transl) (void *, Uint32 *, int, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1435 SDL_PixelFormat *, SDL_PixelFormat *); |
0 | 1436 |
1437 dest = surface->map->dst; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1438 if (!dest) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1439 return -1; |
0 | 1440 df = dest->format; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1441 if (surface->format->BitsPerPixel != 32) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1442 return -1; /* only 32bpp source supported */ |
0 | 1443 |
1444 /* find out whether the destination is one we support, | |
1445 and determine the max size of the encoded result */ | |
1446 masksum = df->Rmask | df->Gmask | df->Bmask; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1447 switch (df->BytesPerPixel) { |
0 | 1448 case 2: |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1449 /* 16bpp: only support 565 and 555 formats */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1450 switch (masksum) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1451 case 0xffff: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1452 if (df->Gmask == 0x07e0 |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1453 || df->Rmask == 0x07e0 || df->Bmask == 0x07e0) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1454 copy_opaque = copy_opaque_16; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1455 copy_transl = copy_transl_565; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1456 } else |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1457 return -1; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1458 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1459 case 0x7fff: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1460 if (df->Gmask == 0x03e0 |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1461 || df->Rmask == 0x03e0 || df->Bmask == 0x03e0) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1462 copy_opaque = copy_opaque_16; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1463 copy_transl = copy_transl_555; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1464 } else |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1465 return -1; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1466 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1467 default: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1468 return -1; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1469 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1470 max_opaque_run = 255; /* runs stored as bytes */ |
0 | 1471 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1472 /* worst case is alternating opaque and translucent pixels, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1473 with room for alignment padding between lines */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1474 maxsize = surface->h * (2 + (4 + 2) * (surface->w + 1)) + 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1475 break; |
0 | 1476 case 4: |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1477 if (masksum != 0x00ffffff) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1478 return -1; /* requires unused high byte */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1479 copy_opaque = copy_32; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1480 copy_transl = copy_32; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1481 max_opaque_run = 255; /* runs stored as short ints */ |
0 | 1482 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1483 /* worst case is alternating opaque and translucent pixels */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1484 maxsize = surface->h * 2 * 4 * (surface->w + 1) + 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1485 break; |
0 | 1486 default: |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1487 return -1; /* anything else unsupported right now */ |
0 | 1488 } |
1489 | |
1490 maxsize += sizeof(RLEDestFormat); | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1491 rlebuf = (Uint8 *) SDL_malloc(maxsize); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1492 if (!rlebuf) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1493 SDL_OutOfMemory(); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1494 return -1; |
0 | 1495 } |
1496 { | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1497 /* save the destination format so we can undo the encoding later */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1498 RLEDestFormat *r = (RLEDestFormat *) rlebuf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1499 r->BytesPerPixel = df->BytesPerPixel; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1500 r->Rloss = df->Rloss; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1501 r->Gloss = df->Gloss; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1502 r->Bloss = df->Bloss; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1503 r->Rshift = df->Rshift; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1504 r->Gshift = df->Gshift; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1505 r->Bshift = df->Bshift; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1506 r->Ashift = df->Ashift; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1507 r->Rmask = df->Rmask; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1508 r->Gmask = df->Gmask; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1509 r->Bmask = df->Bmask; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1510 r->Amask = df->Amask; |
0 | 1511 } |
1512 dst = rlebuf + sizeof(RLEDestFormat); | |
1513 | |
1514 /* Do the actual encoding */ | |
1515 { | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1516 int x, y; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1517 int h = surface->h, w = surface->w; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1518 SDL_PixelFormat *sf = surface->format; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1519 Uint32 *src = (Uint32 *) surface->pixels; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1520 Uint8 *lastline = dst; /* end of last non-blank line */ |
0 | 1521 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1522 /* opaque counts are 8 or 16 bits, depending on target depth */ |
0 | 1523 #define ADD_OPAQUE_COUNTS(n, m) \ |
1524 if(df->BytesPerPixel == 4) { \ | |
1525 ((Uint16 *)dst)[0] = n; \ | |
1526 ((Uint16 *)dst)[1] = m; \ | |
1527 dst += 4; \ | |
1528 } else { \ | |
1529 dst[0] = n; \ | |
1530 dst[1] = m; \ | |
1531 dst += 2; \ | |
1532 } | |
1533 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1534 /* translucent counts are always 16 bit */ |
0 | 1535 #define ADD_TRANSL_COUNTS(n, m) \ |
1536 (((Uint16 *)dst)[0] = n, ((Uint16 *)dst)[1] = m, dst += 4) | |
1537 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1538 for (y = 0; y < h; y++) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1539 int runstart, skipstart; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1540 int blankline = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1541 /* First encode all opaque pixels of a scan line */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1542 x = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1543 do { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1544 int run, skip, len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1545 skipstart = x; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1546 while (x < w && !ISOPAQUE(src[x], sf)) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1547 x++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1548 runstart = x; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1549 while (x < w && ISOPAQUE(src[x], sf)) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1550 x++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1551 skip = runstart - skipstart; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1552 if (skip == w) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1553 blankline = 1; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1554 run = x - runstart; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1555 while (skip > max_opaque_run) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1556 ADD_OPAQUE_COUNTS(max_opaque_run, 0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1557 skip -= max_opaque_run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1558 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1559 len = MIN(run, max_opaque_run); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1560 ADD_OPAQUE_COUNTS(skip, len); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1561 dst += copy_opaque(dst, src + runstart, len, sf, df); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1562 runstart += len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1563 run -= len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1564 while (run) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1565 len = MIN(run, max_opaque_run); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1566 ADD_OPAQUE_COUNTS(0, len); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1567 dst += copy_opaque(dst, src + runstart, len, sf, df); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1568 runstart += len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1569 run -= len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1570 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1571 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1572 while (x < w); |
0 | 1573 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1574 /* Make sure the next output address is 32-bit aligned */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1575 dst += (uintptr_t) dst & 2; |
0 | 1576 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1577 /* Next, encode all translucent pixels of the same scan line */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1578 x = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1579 do { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1580 int run, skip, len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1581 skipstart = x; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1582 while (x < w && !ISTRANSL(src[x], sf)) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1583 x++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1584 runstart = x; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1585 while (x < w && ISTRANSL(src[x], sf)) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1586 x++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1587 skip = runstart - skipstart; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1588 blankline &= (skip == w); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1589 run = x - runstart; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1590 while (skip > max_transl_run) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1591 ADD_TRANSL_COUNTS(max_transl_run, 0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1592 skip -= max_transl_run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1593 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1594 len = MIN(run, max_transl_run); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1595 ADD_TRANSL_COUNTS(skip, len); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1596 dst += copy_transl(dst, src + runstart, len, sf, df); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1597 runstart += len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1598 run -= len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1599 while (run) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1600 len = MIN(run, max_transl_run); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1601 ADD_TRANSL_COUNTS(0, len); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1602 dst += copy_transl(dst, src + runstart, len, sf, df); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1603 runstart += len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1604 run -= len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1605 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1606 if (!blankline) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1607 lastline = dst; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1608 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1609 while (x < w); |
0 | 1610 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1611 src += surface->pitch >> 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1612 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1613 dst = lastline; /* back up past trailing blank lines */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1614 ADD_OPAQUE_COUNTS(0, 0); |
0 | 1615 } |
1616 | |
1617 #undef ADD_OPAQUE_COUNTS | |
1618 #undef ADD_TRANSL_COUNTS | |
1619 | |
1620 /* Now that we have it encoded, release the original pixels */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1621 if (!(surface->flags & SDL_PREALLOC) && !(surface->flags & SDL_HWSURFACE)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1622 SDL_free(surface->pixels); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1623 surface->pixels = NULL; |
0 | 1624 } |
1625 | |
1626 /* realloc the buffer to release unused memory */ | |
1627 { | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1628 Uint8 *p = SDL_realloc(rlebuf, dst - rlebuf); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1629 if (!p) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1630 p = rlebuf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1631 surface->map->sw_data->aux_data = p; |
0 | 1632 } |
1633 | |
1634 return 0; | |
1635 } | |
1636 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1637 static Uint32 |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1638 getpix_8(Uint8 * srcbuf) |
0 | 1639 { |
1640 return *srcbuf; | |
1641 } | |
1642 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1643 static Uint32 |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1644 getpix_16(Uint8 * srcbuf) |
0 | 1645 { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1646 return *(Uint16 *) srcbuf; |
0 | 1647 } |
1648 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1649 static Uint32 |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1650 getpix_24(Uint8 * srcbuf) |
0 | 1651 { |
1155
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1652 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1653 return srcbuf[0] + (srcbuf[1] << 8) + (srcbuf[2] << 16); |
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1654 #else |
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1655 return (srcbuf[0] << 16) + (srcbuf[1] << 8) + srcbuf[2]; |
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1656 #endif |
0 | 1657 } |
1658 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1659 static Uint32 |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1660 getpix_32(Uint8 * srcbuf) |
0 | 1661 { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1662 return *(Uint32 *) srcbuf; |
0 | 1663 } |
1664 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1665 typedef Uint32(*getpix_func) (Uint8 *); |
0 | 1666 |
1667 static getpix_func getpixes[4] = { | |
1668 getpix_8, getpix_16, getpix_24, getpix_32 | |
1669 }; | |
1670 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1671 static int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1672 RLEColorkeySurface(SDL_Surface * surface) |
0 | 1673 { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1674 Uint8 *rlebuf, *dst; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1675 int maxn; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1676 int y; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1677 Uint8 *srcbuf, *curbuf, *lastline; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1678 int maxsize = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1679 int skip, run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1680 int bpp = surface->format->BytesPerPixel; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1681 getpix_func getpix; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1682 Uint32 ckey, rgbmask; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1683 int w, h; |
0 | 1684 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1685 /* calculate the worst case size for the compressed surface */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1686 switch (bpp) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1687 case 1: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1688 /* worst case is alternating opaque and transparent pixels, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1689 starting with an opaque pixel */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1690 maxsize = surface->h * 3 * (surface->w / 2 + 1) + 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1691 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1692 case 2: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1693 case 3: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1694 /* worst case is solid runs, at most 255 pixels wide */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1695 maxsize = surface->h * (2 * (surface->w / 255 + 1) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1696 + surface->w * bpp) + 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1697 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1698 case 4: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1699 /* worst case is solid runs, at most 65535 pixels wide */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1700 maxsize = surface->h * (4 * (surface->w / 65535 + 1) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1701 + surface->w * 4) + 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1702 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1703 } |
0 | 1704 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1705 rlebuf = (Uint8 *) SDL_malloc(maxsize); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1706 if (rlebuf == NULL) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1707 SDL_OutOfMemory(); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1708 return (-1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1709 } |
0 | 1710 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1711 /* Set up the conversion */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1712 srcbuf = (Uint8 *) surface->pixels; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1713 curbuf = srcbuf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1714 maxn = bpp == 4 ? 65535 : 255; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1715 skip = run = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1716 dst = rlebuf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1717 rgbmask = ~surface->format->Amask; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1718 ckey = surface->format->colorkey & rgbmask; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1719 lastline = dst; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1720 getpix = getpixes[bpp - 1]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1721 w = surface->w; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1722 h = surface->h; |
0 | 1723 |
1724 #define ADD_COUNTS(n, m) \ | |
1725 if(bpp == 4) { \ | |
1726 ((Uint16 *)dst)[0] = n; \ | |
1727 ((Uint16 *)dst)[1] = m; \ | |
1728 dst += 4; \ | |
1729 } else { \ | |
1730 dst[0] = n; \ | |
1731 dst[1] = m; \ | |
1732 dst += 2; \ | |
1733 } | |
1734 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1735 for (y = 0; y < h; y++) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1736 int x = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1737 int blankline = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1738 do { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1739 int run, skip, len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1740 int runstart; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1741 int skipstart = x; |
0 | 1742 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1743 /* find run of transparent, then opaque pixels */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1744 while (x < w && (getpix(srcbuf + x * bpp) & rgbmask) == ckey) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1745 x++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1746 runstart = x; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1747 while (x < w && (getpix(srcbuf + x * bpp) & rgbmask) != ckey) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1748 x++; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1749 skip = runstart - skipstart; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1750 if (skip == w) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1751 blankline = 1; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1752 run = x - runstart; |
0 | 1753 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1754 /* encode segment */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1755 while (skip > maxn) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1756 ADD_COUNTS(maxn, 0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1757 skip -= maxn; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1758 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1759 len = MIN(run, maxn); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1760 ADD_COUNTS(skip, len); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1761 SDL_memcpy(dst, srcbuf + runstart * bpp, len * bpp); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1762 dst += len * bpp; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1763 run -= len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1764 runstart += len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1765 while (run) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1766 len = MIN(run, maxn); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1767 ADD_COUNTS(0, len); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1768 SDL_memcpy(dst, srcbuf + runstart * bpp, len * bpp); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1769 dst += len * bpp; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1770 runstart += len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1771 run -= len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1772 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1773 if (!blankline) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1774 lastline = dst; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1775 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1776 while (x < w); |
0 | 1777 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1778 srcbuf += surface->pitch; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1779 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1780 dst = lastline; /* back up bast trailing blank lines */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1781 ADD_COUNTS(0, 0); |
0 | 1782 |
1783 #undef ADD_COUNTS | |
1784 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1785 /* Now that we have it encoded, release the original pixels */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1786 if (!(surface->flags & SDL_PREALLOC) && !(surface->flags & SDL_HWSURFACE)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1787 SDL_free(surface->pixels); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1788 surface->pixels = NULL; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1789 } |
0 | 1790 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1791 /* realloc the buffer to release unused memory */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1792 { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1793 /* If realloc returns NULL, the original block is left intact */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1794 Uint8 *p = SDL_realloc(rlebuf, dst - rlebuf); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1795 if (!p) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1796 p = rlebuf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1797 surface->map->sw_data->aux_data = p; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1798 } |
0 | 1799 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1800 return (0); |
0 | 1801 } |
1802 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1803 int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1804 SDL_RLESurface(SDL_Surface * surface) |
0 | 1805 { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1806 int retcode; |
0 | 1807 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1808 /* Clear any previous RLE conversion */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1809 if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1810 SDL_UnRLESurface(surface, 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1811 } |
0 | 1812 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1813 /* We don't support RLE encoding of bitmaps */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1814 if (surface->format->BitsPerPixel < 8) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1815 return (-1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1816 } |
0 | 1817 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1818 /* Lock the surface if it's in hardware */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1819 if (SDL_MUSTLOCK(surface)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1820 if (SDL_LockSurface(surface) < 0) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1821 return (-1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1822 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1823 } |
0 | 1824 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1825 /* Encode */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1826 if ((surface->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1827 retcode = RLEColorkeySurface(surface); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1828 } else { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1829 if ((surface->flags & SDL_SRCALPHA) == SDL_SRCALPHA |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1830 && surface->format->Amask != 0) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1831 retcode = RLEAlphaSurface(surface); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1832 else |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1833 retcode = -1; /* no RLE for per-surface alpha sans ckey */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1834 } |
0 | 1835 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1836 /* Unlock the surface if it's in hardware */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1837 if (SDL_MUSTLOCK(surface)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1838 SDL_UnlockSurface(surface); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1839 } |
0 | 1840 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1841 if (retcode < 0) |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1842 return -1; |
0 | 1843 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1844 /* The surface is now accelerated */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1845 surface->flags |= SDL_RLEACCEL; |
0 | 1846 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1847 return (0); |
0 | 1848 } |
1849 | |
1850 /* | |
1851 * Un-RLE a surface with pixel alpha | |
1852 * This may not give back exactly the image before RLE-encoding; all | |
1853 * completely transparent pixels will be lost, and colour and alpha depth | |
1854 * may have been reduced (when encoding for 16bpp targets). | |
1855 */ | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1856 static SDL_bool |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1857 UnRLEAlpha(SDL_Surface * surface) |
0 | 1858 { |
1859 Uint8 *srcbuf; | |
1860 Uint32 *dst; | |
1861 SDL_PixelFormat *sf = surface->format; | |
1862 RLEDestFormat *df = surface->map->sw_data->aux_data; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1863 int (*uncopy_opaque) (Uint32 *, void *, int, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1864 RLEDestFormat *, SDL_PixelFormat *); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1865 int (*uncopy_transl) (Uint32 *, void *, int, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1866 RLEDestFormat *, SDL_PixelFormat *); |
0 | 1867 int w = surface->w; |
1868 int bpp = df->BytesPerPixel; | |
1869 | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1870 if (bpp == 2) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1871 uncopy_opaque = uncopy_opaque_16; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1872 uncopy_transl = uncopy_transl_16; |
0 | 1873 } else { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1874 uncopy_opaque = uncopy_transl = uncopy_32; |
0 | 1875 } |
1876 | |
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
1877 surface->pixels = SDL_malloc(surface->h * surface->pitch); |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1878 if (!surface->pixels) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1879 return (SDL_FALSE); |
944
cdea7cbc3e23
Date: Wed, 28 Jul 2004 14:56:57 +0800
Sam Lantinga <slouken@libsdl.org>
parents:
880
diff
changeset
|
1880 } |
0 | 1881 /* fill background with transparent pixels */ |
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
1882 SDL_memset(surface->pixels, 0, surface->h * surface->pitch); |
0 | 1883 |
1884 dst = surface->pixels; | |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1885 srcbuf = (Uint8 *) (df + 1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1886 for (;;) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1887 /* copy opaque pixels */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1888 int ofs = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1889 do { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1890 unsigned run; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1891 if (bpp == 2) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1892 ofs += srcbuf[0]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1893 run = srcbuf[1]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1894 srcbuf += 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1895 } else { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1896 ofs += ((Uint16 *) srcbuf)[0]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1897 run = ((Uint16 *) srcbuf)[1]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1898 srcbuf += 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1899 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1900 if (run) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1901 srcbuf += uncopy_opaque(dst + ofs, srcbuf, run, df, sf); |
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1902 ofs += run; |
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1903 } else if (!ofs) |
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1904 return (SDL_TRUE); |
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1905 } |
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1906 while (ofs < w); |
0 | 1907 |
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1908 /* skip padding if needed */ |
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1909 if (bpp == 2) |
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1910 srcbuf += (uintptr_t) srcbuf & 2; |
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1911 |
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1912 /* copy translucent pixels */ |
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1913 ofs = 0; |
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1914 do { |
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1915 unsigned run; |
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1916 ofs += ((Uint16 *) srcbuf)[0]; |
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1917 run = ((Uint16 *) srcbuf)[1]; |
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1918 srcbuf += 4; |
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1919 if (run) { |
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1920 srcbuf += uncopy_transl(dst + ofs, srcbuf, run, df, sf); |
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1921 ofs += run; |
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1922 } |
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1923 } |
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1924 while (ofs < w); |
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1925 dst += surface->pitch >> 2; |
0 | 1926 } |
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1927 /* Make the compiler happy */ |
1895
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1928 return (SDL_TRUE); |
0 | 1929 } |
1930 | |
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1931 void |
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1932 SDL_UnRLESurface(SDL_Surface * surface, int recode) |
0 | 1933 { |
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1934 if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) { |
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1935 surface->flags &= ~SDL_RLEACCEL; |
0 | 1936 |
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1937 if (recode && !(surface->flags & SDL_PREALLOC) |
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1938 && !(surface->flags & SDL_HWSURFACE)) { |
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1939 if ((surface->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) { |
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1940 SDL_Rect full; |
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1941 unsigned alpha_flag; |
0 | 1942 |
1895
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1943 /* re-create the original surface */ |
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1944 surface->pixels = SDL_malloc(surface->h * surface->pitch); |
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1945 if (!surface->pixels) { |
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1946 /* Oh crap... */ |
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1947 surface->flags |= SDL_RLEACCEL; |
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1948 return; |
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1949 } |
0 | 1950 |
1895
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1951 /* fill it with the background colour */ |
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1952 SDL_FillRect(surface, NULL, surface->format->colorkey); |
0 | 1953 |
1895
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1954 /* now render the encoded surface */ |
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1955 full.x = full.y = 0; |
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1956 full.w = surface->w; |
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1957 full.h = surface->h; |
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1958 alpha_flag = surface->flags & SDL_SRCALPHA; |
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1959 surface->flags &= ~SDL_SRCALPHA; /* opaque blit */ |
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1960 SDL_RLEBlit(surface, &full, surface, &full); |
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1961 surface->flags |= alpha_flag; |
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1962 } else { |
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1963 if (!UnRLEAlpha(surface)) { |
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1964 /* Oh crap... */ |
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1965 surface->flags |= SDL_RLEACCEL; |
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1966 return; |
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1967 } |
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1968 } |
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1969 } |
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1970 |
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1971 if (surface->map && surface->map->sw_data->aux_data) { |
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1972 SDL_free(surface->map->sw_data->aux_data); |
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1973 surface->map->sw_data->aux_data = NULL; |
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1974 } |
0 | 1975 } |
1976 } | |
1977 | |
1895
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1978 /* vi: set ts=4 sw=4 expandtab: */ |