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annotate src/video/cybergfx/SDL_cgxaccel.c @ 1682:7ae8018b2e5d SDL-1.3

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Default palette entries to white, instead of black. More palettized video mode support...
author Sam Lantinga <slouken@libsdl.org>
date Fri, 16 Jun 2006 06:00:31 +0000
parents 4da1ee79c9af
children
rev   line source
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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_endian.h"
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25 #include "SDL_video.h"
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26 #include "../SDL_sysvideo.h"
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27 #include "../SDL_blit.h"
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28 #include "SDL_cgxvideo.h"
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29
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30 static int CGX_HWAccelBlit(SDL_Surface * src, SDL_Rect * srcrect,
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31 SDL_Surface * dst, SDL_Rect * dstrect);
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32
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33 // These are needed to avoid register troubles with gcc -O2!
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34
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35 #if defined(__SASC) || defined(__PPC__) || defined(MORPHOS)
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36 #define BMKBRP(a,b,c,d,e,f,g,h,i,j) BltMaskBitMapRastPort(a,b,c,d,e,f,g,h,i,j)
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37 #define BBRP(a,b,c,d,e,f,g,h,i) BltBitMapRastPort(a,b,c,d,e,f,g,h,i)
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38 #define BBB(a,b,c,d,e,f,g,h,i,j,k) BltBitMap(a,b,c,d,e,f,g,h,i,j,k)
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39 #else
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40 void
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41 BMKBRP(struct BitMap *a, WORD b, WORD c, struct RastPort *d, WORD e, WORD f,
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42 WORD g, WORD h, UBYTE i, APTR j)
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43 {
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44 BltMaskBitMapRastPort(a, b, c, d, e, f, g, h, i, j);
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45 }
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46
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47 void
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48 BBRP(struct BitMap *a, WORD b, WORD c, struct RastPort *d, WORD e, WORD f,
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49 WORD g, WORD h, UBYTE i)
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50 {
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51 BltBitMapRastPort(a, b, c, d, e, f, g, h, i);
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52 }
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53
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54 void
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55 BBB(struct BitMap *a, WORD b, WORD c, struct BitMap *d, WORD e, WORD f,
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56 WORD g, WORD h, UBYTE i, UBYTE j, UWORD * k)
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57 {
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58 BltBitMap(a, b, c, d, e, f, g, h, i, j, k);
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59 }
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60 #endif
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61
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62 int
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63 CGX_SetHWColorKey(_THIS, SDL_Surface * surface, Uint32 key)
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64 {
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65 if (surface->hwdata) {
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66 if (surface->hwdata->mask)
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67 SDL_free(surface->hwdata->mask);
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68
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69 if (surface->hwdata->mask =
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70 SDL_malloc(RASSIZE(surface->w, surface->h))) {
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71 Uint32 pitch, ok = 0;
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72 APTR lock;
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73
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74 SDL_memset(surface->hwdata->mask, 255,
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75 RASSIZE(surface->w, surface->h));
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76
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77 D(bug
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78 ("Building colorkey mask: color: %ld, size: %ld x %ld, %ld bytes...Bpp:%ld\n",
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79 key, surface->w, surface->h, RASSIZE(surface->w,
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80 surface->h),
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81 surface->format->BytesPerPixel));
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82
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83 if (lock =
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84 LockBitMapTags(surface->hwdata->bmap, LBMI_BASEADDRESS,
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85 (ULONG) & surface->pixels,
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86 LBMI_BYTESPERROW, (ULONG) & pitch, TAG_DONE)) {
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87 switch (surface->format->BytesPerPixel) {
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88 case 1:
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89 {
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90 unsigned char k = key;
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91 register int i, j, t;
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92 register unsigned char *dest =
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93 surface->hwdata->mask, *map = surface->pixels;
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94
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95 pitch -= surface->w;
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96
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97 for (i = 0; i < surface->h; i++) {
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98 for (t = 128, j = 0; j < surface->w; j++) {
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99 if (*map == k)
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100 *dest &= ~t;
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101
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102 t >>= 1;
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103
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104 if (t == 0) {
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105 dest++;
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106 t = 128;
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107 }
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108 map++;
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109 }
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110 map += pitch;
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111 }
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112 }
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113 break;
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114 case 2:
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115 {
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116 Uint16 k = key, *mapw;
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117 register int i, j, t;
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118 register unsigned char *dest =
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119 surface->hwdata->mask, *map = surface->pixels;
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120
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121 for (i = surface->h; i; --i) {
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122 mapw = (Uint16 *) map;
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123
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124 for (t = 128, j = surface->w; j; --j) {
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125 if (*mapw == k)
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126 *dest &= ~t;
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127
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128 t >>= 1;
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129
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130 if (t == 0) {
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131 dest++;
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132 t = 128;
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133 }
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134 mapw++;
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135 }
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136 map += pitch;
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137 }
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138 }
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139 break;
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140 case 4:
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141 {
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142 Uint32 *mapl;
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143 register int i, j, t;
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144 register unsigned char *dest =
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145 surface->hwdata->mask, *map = surface->pixels;
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146
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147 for (i = surface->h; i; --i) {
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148 mapl = (Uint32 *) map;
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149
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150 for (t = 128, j = surface->w; j; --j) {
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151 if (*mapl == key)
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152 *dest &= ~t;
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153
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154 t >>= 1;
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155
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156 if (t == 0) {
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157 dest++;
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158 t = 128;
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159 }
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160 mapl++;
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161 }
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162 map += pitch;
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163 }
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164
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165 }
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166 break;
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167 default:
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168 D(bug("Pixel mode non supported for color key..."));
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169 SDL_free(surface->hwdata->mask);
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170 surface->hwdata->mask = NULL;
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171 ok = -1;
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172 }
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173 UnLockBitMap(lock);
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174 D(bug("...Colorkey built!\n"));
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175 return ok;
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176 }
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177 }
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178 }
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179 D(bug("HW colorkey not supported for this depth\n"));
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180
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181 return -1;
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182 }
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183
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184 int
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185 CGX_CheckHWBlit(_THIS, SDL_Surface * src, SDL_Surface * dst)
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186 {
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187 // Doesn't support yet alpha blitting
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188
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189 if (src->hwdata && !(src->flags & (SDL_SRCALPHA))) {
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190 D(bug("CheckHW blit... OK!\n"));
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191
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192 if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
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193 if (CGX_SetHWColorKey(this, src, src->format->colorkey) < 0) {
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194 src->flags &= ~SDL_HWACCEL;
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195 return -1;
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196 }
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197 }
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198
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199 src->flags |= SDL_HWACCEL;
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200 src->map->hw_blit = CGX_HWAccelBlit;
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201 return 1;
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202 } else
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203 src->flags &= ~SDL_HWACCEL;
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204
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205 D(bug("CheckHW blit... NO!\n"));
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206
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207 return 0;
0
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208 }
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209
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210 static int temprp_init = 0;
0
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211 static struct RastPort temprp;
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212
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213 static int
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214 CGX_HWAccelBlit(SDL_Surface * src, SDL_Rect * srcrect,
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215 SDL_Surface * dst, SDL_Rect * dstrect)
0
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216 {
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217 struct SDL_VideoDevice *this = src->hwdata->videodata;
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218
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219 // D(bug("Accel blit!\n"));
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220
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221 if (src->flags & SDL_SRCCOLORKEY && src->hwdata->mask) {
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222 if (dst == SDL_VideoSurface) {
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223 BMKBRP(src->hwdata->bmap, srcrect->x, srcrect->y,
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224 SDL_RastPort, dstrect->x + SDL_Window->BorderLeft,
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225 dstrect->y + SDL_Window->BorderTop, srcrect->w,
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226 srcrect->h, 0xc0, src->hwdata->mask);
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227 } else if (dst->hwdata) {
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228 if (!temprp_init) {
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229 InitRastPort(&temprp);
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230 temprp_init = 1;
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231 }
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232 temprp.BitMap = (struct BitMap *) dst->hwdata->bmap;
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233
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234 BMKBRP(src->hwdata->bmap, srcrect->x, srcrect->y,
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235 &temprp, dstrect->x, dstrect->y,
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236 srcrect->w, srcrect->h, 0xc0, src->hwdata->mask);
21
75a95f82bc1f Updated the Amiga OS port of SDL (thanks Gabriele)
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parents: 0
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237
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238 }
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239 } else if (dst == SDL_VideoSurface) {
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240 BBRP(src->hwdata->bmap, srcrect->x, srcrect->y, SDL_RastPort,
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241 dstrect->x + SDL_Window->BorderLeft,
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242 dstrect->y + SDL_Window->BorderTop, srcrect->w, srcrect->h,
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243 0xc0);
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244 } else if (dst->hwdata)
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245 BBB(src->hwdata->bmap, srcrect->x, srcrect->y, dst->hwdata->bmap,
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246 dstrect->x, dstrect->y, srcrect->w, srcrect->h, 0xc0, 0xff, NULL);
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247
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248 return 0;
0
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249 }
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250
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251 int
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252 CGX_FillHWRect(_THIS, SDL_Surface * dst, SDL_Rect * dstrect, Uint32 color)
0
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253 {
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254 if (dst == SDL_VideoSurface) {
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255 FillPixelArray(SDL_RastPort, dstrect->x + SDL_Window->BorderLeft,
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256 dstrect->y + SDL_Window->BorderTop, dstrect->w,
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257 dstrect->h, color);
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258 } else if (dst->hwdata) {
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259 if (!temprp_init) {
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260 InitRastPort(&temprp);
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261 temprp_init = 1;
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262 }
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263
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264 temprp.BitMap = (struct BitMap *) dst->hwdata->bmap;
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265
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266 FillPixelArray(&temprp, dstrect->x, dstrect->y, dstrect->w,
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267 dstrect->h, color);
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268 }
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269 return 0;
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270 }
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271
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272 /* vi: set ts=4 sw=4 expandtab: */