annotate src/video/SDL_fill.c @ 2457:946f43d71626 gsoc2008_iphone

(none)
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Sat, 16 Aug 2008 00:25:55 +0000
parents 6d99edd791bf
children af3dd02cf043
rev   line source
2253
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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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
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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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
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include "SDL_video.h"
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25 #include "SDL_blit.h"
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26
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27
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28 #ifdef __SSE__
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29 /* *INDENT-OFF* */
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30
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31 #ifdef _MSC_VER
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32 #define SSE_BEGIN \
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33 __m128 c128; \
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34 c128.m128_u32[0] = color; \
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35 c128.m128_u32[1] = color; \
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36 c128.m128_u32[2] = color; \
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37 c128.m128_u32[3] = color;
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38 #else
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39 #define SSE_BEGIN \
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40 DECLARE_ALIGNED(Uint32, cccc[4], 16); \
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41 cccc[0] = color; \
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42 cccc[1] = color; \
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43 cccc[2] = color; \
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44 cccc[3] = color; \
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45 __m128 c128 = *(__m128 *)cccc;
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46 #endif
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47
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48 #define SSE_WORK \
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49 for (i = n / 64; i--;) { \
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50 _mm_stream_ps((float *)(p+0), c128); \
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51 _mm_stream_ps((float *)(p+16), c128); \
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52 _mm_stream_ps((float *)(p+32), c128); \
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53 _mm_stream_ps((float *)(p+48), c128); \
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54 p += 64; \
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55 }
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56
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57 #define SSE_END
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58
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59 #define DEFINE_SSE_FILLRECT(bpp, type) \
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60 static void \
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61 SDL_FillRect##bpp##SSE(Uint8 *pixels, int pitch, Uint32 color, int w, int h) \
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62 { \
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63 SSE_BEGIN; \
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64 \
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65 while (h--) { \
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66 int i, n = w * bpp; \
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67 Uint8 *p = pixels; \
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68 \
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69 if (n > 15) { \
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70 int adjust = 16 - ((uintptr_t)p & 15); \
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71 if (adjust < 16) { \
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72 n -= adjust; \
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73 adjust /= bpp; \
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74 while(adjust--) { \
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75 *((type *)p) = (type)color; \
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76 p += bpp; \
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77 } \
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78 } \
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79 SSE_WORK; \
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80 } \
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81 if (n & 63) { \
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82 int remainder = (n & 63); \
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83 remainder /= bpp; \
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84 while(remainder--) { \
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85 *((type *)p) = (type)color; \
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86 p += bpp; \
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87 } \
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88 } \
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89 pixels += pitch; \
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90 } \
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91 \
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92 SSE_END; \
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93 }
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94
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95 DEFINE_SSE_FILLRECT(1, Uint8)
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96 DEFINE_SSE_FILLRECT(2, Uint16)
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97 DEFINE_SSE_FILLRECT(4, Uint32)
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98
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99 /* *INDENT-ON* */
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100 #endif /* __SSE__ */
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101
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102 #ifdef __MMX__
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103 /* *INDENT-OFF* */
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104
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105 #define MMX_BEGIN \
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106 __m64 c64 = _mm_set_pi32(color, color)
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107
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108 #define MMX_WORK \
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109 for (i = n / 64; i--;) { \
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110 _mm_stream_pi((__m64 *)(p+0), c64); \
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111 _mm_stream_pi((__m64 *)(p+8), c64); \
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112 _mm_stream_pi((__m64 *)(p+16), c64); \
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113 _mm_stream_pi((__m64 *)(p+24), c64); \
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114 _mm_stream_pi((__m64 *)(p+32), c64); \
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115 _mm_stream_pi((__m64 *)(p+40), c64); \
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116 _mm_stream_pi((__m64 *)(p+48), c64); \
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117 _mm_stream_pi((__m64 *)(p+56), c64); \
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118 p += 64; \
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119 }
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120
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121 #define MMX_END \
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122 _mm_empty()
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123
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124 #define DEFINE_MMX_FILLRECT(bpp, type) \
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125 static void \
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126 SDL_FillRect##bpp##MMX(Uint8 *pixels, int pitch, Uint32 color, int w, int h) \
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127 { \
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128 MMX_BEGIN; \
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129 \
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130 while (h--) { \
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131 int i, n = w * bpp; \
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132 Uint8 *p = pixels; \
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133 \
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134 if (n > 7) { \
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135 int adjust = 8 - ((uintptr_t)p & 7); \
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136 if (adjust < 8) { \
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137 n -= adjust; \
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138 adjust /= bpp; \
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139 while(adjust--) { \
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140 *((type *)p) = (type)color; \
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141 p += bpp; \
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142 } \
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143 } \
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144 MMX_WORK; \
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145 } \
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146 if (n & 63) { \
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147 int remainder = (n & 63); \
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148 remainder /= bpp; \
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149 while(remainder--) { \
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150 *((type *)p) = (type)color; \
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151 p += bpp; \
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152 } \
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153 } \
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154 pixels += pitch; \
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155 } \
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156 \
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157 MMX_END; \
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158 }
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159
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160 DEFINE_MMX_FILLRECT(1, Uint8)
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161 DEFINE_MMX_FILLRECT(2, Uint16)
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162 DEFINE_MMX_FILLRECT(4, Uint32)
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163
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164 /* *INDENT-ON* */
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165 #endif /* __MMX__ */
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166
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167 static void
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168 SDL_FillRect1(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
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169 {
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170 while (h--) {
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171 int n = w;
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172 Uint8 *p = pixels;
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173
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174 if (n > 3) {
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175 switch ((uintptr_t) p & 3) {
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176 case 1:
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177 *p++ = (Uint8) color;
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178 --n;
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179 case 2:
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180 *p++ = (Uint8) color;
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181 --n;
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182 case 3:
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183 *p++ = (Uint8) color;
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184 --n;
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185 }
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186 SDL_memset4(p, color, (n >> 2));
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187 }
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188 if (n & 3) {
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189 p += (n & ~3);
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190 switch (n & 3) {
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191 case 3:
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192 *p++ = (Uint8) color;
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193 case 2:
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194 *p++ = (Uint8) color;
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195 case 1:
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196 *p++ = (Uint8) color;
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197 }
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198 }
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199 pixels += pitch;
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200 }
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201 }
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202
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203 static void
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204 SDL_FillRect2(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
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205 {
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206 while (h--) {
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207 int n = w;
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208 Uint16 *p = (Uint16 *) pixels;
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209
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210 if (n > 1) {
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211 if ((uintptr_t) p & 2) {
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212 *p++ = (Uint16) color;
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213 --n;
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214 }
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215 SDL_memset4(p, color, (n >> 1));
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216 }
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217 if (n & 1) {
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218 p[n - 1] = (Uint16) color;
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219 }
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220 pixels += pitch;
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221 }
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222 }
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223
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224 static void
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225 SDL_FillRect3(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
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226 {
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227 Uint8 r = (Uint8) ((color >> 16) & 0xFF);
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228 Uint8 g = (Uint8) ((color >> 8) & 0xFF);
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229 Uint8 b = (Uint8) (color & 0xFF);
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230
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231 while (h--) {
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232 int n = w;
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233 Uint8 *p = pixels;
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234
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235 while (n--) {
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236 *p++ = r;
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237 *p++ = g;
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238 *p++ = b;
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239 }
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240 pixels += pitch;
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241 }
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242 }
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243
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244 static void
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245 SDL_FillRect4(Uint8 * pixels, int pitch, Uint32 color, int w, int h)
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246 {
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247 while (h--) {
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248 SDL_memset4(pixels, color, w);
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249 pixels += pitch;
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250 }
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251 }
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252
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253 /*
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254 * This function performs a fast fill of the given rectangle with 'color'
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255 */
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256 int
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257 SDL_FillRect(SDL_Surface * dst, SDL_Rect * dstrect, Uint32 color)
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258 {
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259 Uint8 *pixels;
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260
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261 /* This function doesn't work on surfaces < 8 bpp */
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262 if (dst->format->BitsPerPixel < 8) {
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263 SDL_SetError("SDL_FillRect(): Unsupported surface format");
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264 return (-1);
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265 }
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266
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267 /* If 'dstrect' == NULL, then fill the whole surface */
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268 if (dstrect) {
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269 /* Perform clipping */
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270 if (!SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect)) {
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271 return (0);
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272 }
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273 } else {
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274 dstrect = &dst->clip_rect;
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275 }
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276
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277 /* Perform software fill */
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278 if (!dst->pixels) {
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279 SDL_SetError("SDL_FillRect(): You must lock the surface");
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280 return (-1);
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281 }
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282
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283 pixels =
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284 (Uint8 *) dst->pixels + dstrect->y * dst->pitch +
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285 dstrect->x * dst->format->BytesPerPixel;
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286
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287 switch (dst->format->BytesPerPixel) {
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288 case 1:
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289 {
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290 color |= (color << 8);
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291 color |= (color << 16);
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292 #ifdef __SSE__
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293 if (SDL_HasSSE()) {
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294 SDL_FillRect1SSE(pixels, dst->pitch, color, dstrect->w,
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295 dstrect->h);
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296 break;
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297 }
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298 #endif
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299 #ifdef __MMX__
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300 if (SDL_HasMMX()) {
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301 SDL_FillRect1MMX(pixels, dst->pitch, color, dstrect->w,
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302 dstrect->h);
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303 break;
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304 }
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305 #endif
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306 SDL_FillRect1(pixels, dst->pitch, color, dstrect->w, dstrect->h);
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307 break;
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308 }
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309
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310 case 2:
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311 {
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312 color |= (color << 16);
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313 #ifdef __SSE__
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314 if (SDL_HasSSE()) {
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315 SDL_FillRect2SSE(pixels, dst->pitch, color, dstrect->w,
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316 dstrect->h);
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317 break;
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318 }
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319 #endif
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320 #ifdef __MMX__
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321 if (SDL_HasMMX()) {
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322 SDL_FillRect2MMX(pixels, dst->pitch, color, dstrect->w,
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323 dstrect->h);
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324 break;
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325 }
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326 #endif
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327 SDL_FillRect2(pixels, dst->pitch, color, dstrect->w, dstrect->h);
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328 break;
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329 }
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330
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331 case 3:
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332 /* 24-bit RGB is a slow path, at least for now. */
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333 {
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334 SDL_FillRect3(pixels, dst->pitch, color, dstrect->w, dstrect->h);
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335 break;
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336 }
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337
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338 case 4:
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339 {
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340 #ifdef __SSE__
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341 if (SDL_HasSSE()) {
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342 SDL_FillRect4SSE(pixels, dst->pitch, color, dstrect->w,
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343 dstrect->h);
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344 break;
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345 }
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346 #endif
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347 #ifdef __MMX__
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348 if (SDL_HasMMX()) {
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349 SDL_FillRect4MMX(pixels, dst->pitch, color, dstrect->w,
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350 dstrect->h);
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351 break;
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352 }
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353 #endif
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354 SDL_FillRect4(pixels, dst->pitch, color, dstrect->w, dstrect->h);
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355 break;
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356 }
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357 }
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358
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359 SDL_UnlockSurface(dst);
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360
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361 /* We're done! */
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362 return (0);
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363 }
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364
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365 /* vi: set ts=4 sw=4 expandtab: */