Mercurial > sdl-ios-xcode
annotate src/video/SDL_surface.c @ 2257:340942cfda48
Moved the colorkey and per-surface alpha into the blit info,
in preparation for support for general color channel modulation.
Removed and consolidated some data in the blit info.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Fri, 17 Aug 2007 00:54:53 +0000 |
parents | 6d99edd791bf |
children | 202ddfd1cfb1 |
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 #include "SDL_video.h" | |
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25 #include "SDL_compat.h" |
0 | 26 #include "SDL_sysvideo.h" |
27 #include "SDL_blit.h" | |
28 #include "SDL_RLEaccel_c.h" | |
29 #include "SDL_pixels_c.h" | |
30 #include "SDL_leaks.h" | |
31 | |
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32 |
0 | 33 /* Public routines */ |
34 /* | |
35 * Create an empty RGB surface of the appropriate depth | |
36 */ | |
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37 SDL_Surface * |
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38 SDL_CreateRGBSurface(Uint32 flags, |
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39 int width, int height, int depth, |
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40 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) |
0 | 41 { |
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42 SDL_Surface *surface; |
0 | 43 |
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44 /* Allocate the surface */ |
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45 surface = (SDL_Surface *) SDL_calloc(1, sizeof(*surface)); |
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46 if (surface == NULL) { |
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47 SDL_OutOfMemory(); |
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48 return NULL; |
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49 } |
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50 |
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51 surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask); |
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52 if (!surface->format) { |
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53 SDL_FreeSurface(surface); |
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54 return NULL; |
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55 } |
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56 if (Amask) { |
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57 surface->flags |= SDL_SRCALPHA; |
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58 } |
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59 surface->w = width; |
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60 surface->h = height; |
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61 surface->pitch = SDL_CalculatePitch(surface); |
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62 SDL_SetClipRect(surface, NULL); |
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63 |
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64 if (surface->format->BitsPerPixel <= 8) { |
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65 SDL_Palette *palette = |
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66 SDL_AllocPalette((1 << surface->format->BitsPerPixel)); |
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67 if (!palette) { |
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68 SDL_FreeSurface(surface); |
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69 return NULL; |
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70 } |
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71 if (Rmask || Bmask || Gmask) { |
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72 const SDL_PixelFormat *format = surface->format; |
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73 |
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74 /* create palette according to masks */ |
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75 int i; |
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76 int Rm = 0, Gm = 0, Bm = 0; |
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77 int Rw = 0, Gw = 0, Bw = 0; |
0 | 78 |
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79 if (Rmask) { |
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80 Rw = 8 - format->Rloss; |
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81 for (i = format->Rloss; i > 0; i -= Rw) |
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82 Rm |= 1 << i; |
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83 } |
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84 if (Gmask) { |
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85 Gw = 8 - format->Gloss; |
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86 for (i = format->Gloss; i > 0; i -= Gw) |
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87 Gm |= 1 << i; |
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88 } |
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89 if (Bmask) { |
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90 Bw = 8 - format->Bloss; |
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91 for (i = format->Bloss; i > 0; i -= Bw) |
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92 Bm |= 1 << i; |
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93 } |
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94 for (i = 0; i < palette->ncolors; ++i) { |
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95 int r, g, b; |
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96 r = (i & Rmask) >> format->Rshift; |
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97 r = (r << format->Rloss) | ((r * Rm) >> Rw); |
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98 palette->colors[i].r = r; |
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99 |
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100 g = (i & Gmask) >> format->Gshift; |
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101 g = (g << format->Gloss) | ((g * Gm) >> Gw); |
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102 palette->colors[i].g = g; |
0 | 103 |
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104 b = (i & Bmask) >> format->Bshift; |
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105 b = (b << format->Bloss) | ((b * Bm) >> Bw); |
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106 palette->colors[i].b = b; |
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107 } |
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108 } else if (palette->ncolors == 2) { |
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109 /* Create a black and white bitmap palette */ |
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110 palette->colors[0].r = 0xFF; |
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111 palette->colors[0].g = 0xFF; |
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112 palette->colors[0].b = 0xFF; |
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113 palette->colors[1].r = 0x00; |
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114 palette->colors[1].g = 0x00; |
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115 palette->colors[1].b = 0x00; |
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116 } |
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117 SDL_SetSurfacePalette(surface, palette); |
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118 SDL_FreePalette(palette); |
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119 } |
0 | 120 |
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121 /* Get the pixels */ |
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122 if (surface->w && surface->h) { |
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123 surface->pixels = SDL_malloc(surface->h * surface->pitch); |
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124 if (!surface->pixels) { |
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125 SDL_FreeSurface(surface); |
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126 SDL_OutOfMemory(); |
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127 return NULL; |
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128 } |
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129 /* This is important for bitmaps */ |
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130 SDL_memset(surface->pixels, 0, surface->h * surface->pitch); |
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131 } |
0 | 132 |
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133 /* Allocate an empty mapping */ |
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134 surface->map = SDL_AllocBlitMap(); |
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135 if (!surface->map) { |
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136 SDL_FreeSurface(surface); |
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137 return NULL; |
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138 } |
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139 SDL_FormatChanged(surface); |
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140 |
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141 /* The surface is ready to go */ |
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142 surface->refcount = 1; |
0 | 143 #ifdef CHECK_LEAKS |
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144 ++surfaces_allocated; |
0 | 145 #endif |
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146 return surface; |
0 | 147 } |
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148 |
0 | 149 /* |
150 * Create an RGB surface from an existing memory buffer | |
151 */ | |
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152 SDL_Surface * |
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153 SDL_CreateRGBSurfaceFrom(void *pixels, |
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154 int width, int height, int depth, int pitch, |
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155 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, |
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156 Uint32 Amask) |
0 | 157 { |
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158 SDL_Surface *surface; |
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159 |
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160 surface = |
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161 SDL_CreateRGBSurface(0, 0, 0, depth, Rmask, Gmask, Bmask, Amask); |
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162 if (surface != NULL) { |
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163 surface->flags |= SDL_PREALLOC; |
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164 surface->pixels = pixels; |
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165 surface->w = width; |
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166 surface->h = height; |
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167 surface->pitch = pitch; |
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168 SDL_SetClipRect(surface, NULL); |
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169 } |
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170 return surface; |
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171 } |
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172 |
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173 static int |
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174 SDL_SurfacePaletteChanged(void *userdata, SDL_Palette * palette) |
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175 { |
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176 SDL_Surface *surface = (SDL_Surface *) userdata; |
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177 |
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178 SDL_FormatChanged(surface); |
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179 |
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180 return 0; |
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181 } |
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182 |
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183 int |
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184 SDL_SetSurfacePalette(SDL_Surface * surface, SDL_Palette * palette) |
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185 { |
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186 if (!surface || !surface->format) { |
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187 SDL_SetError("SDL_SetSurfacePalette() passed a NULL surface"); |
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188 return -1; |
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189 } |
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190 |
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191 if (palette && palette->ncolors != (1 << surface->format->BitsPerPixel)) { |
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192 SDL_SetError |
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193 ("SDL_SetSurfacePalette() passed a palette that doesn't match the surface format"); |
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194 return -1; |
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195 } |
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196 |
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197 if (surface->format->palette == palette) { |
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198 return 0; |
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199 } |
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200 |
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201 if (surface->format->palette) { |
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202 SDL_DelPaletteWatch(surface->format->palette, |
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203 SDL_SurfacePaletteChanged, surface); |
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204 } |
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205 |
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206 surface->format->palette = palette; |
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207 |
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208 if (surface->format->palette) { |
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209 SDL_AddPaletteWatch(surface->format->palette, |
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210 SDL_SurfacePaletteChanged, surface); |
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211 } |
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212 return 0; |
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213 } |
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214 |
0 | 215 /* |
216 * Set the color key in a blittable surface | |
217 */ | |
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218 int |
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219 SDL_SetColorKey(SDL_Surface * surface, Uint32 flag, Uint32 key) |
0 | 220 { |
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221 /* Sanity check the flag as it gets passed in */ |
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222 if (flag & SDL_SRCCOLORKEY) { |
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223 if (flag & (SDL_RLEACCEL | SDL_RLEACCELOK)) { |
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224 flag = (SDL_SRCCOLORKEY | SDL_RLEACCELOK); |
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225 } else { |
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226 flag = SDL_SRCCOLORKEY; |
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227 } |
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228 } else { |
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229 flag = 0; |
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230 } |
0 | 231 |
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232 /* Optimize away operations that don't change anything */ |
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233 if ((flag == (surface->flags & (SDL_SRCCOLORKEY | SDL_RLEACCELOK))) && |
2257
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234 (key == surface->map->ckey)) { |
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235 return (0); |
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236 } |
0 | 237 |
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238 /* UnRLE surfaces before we change the colorkey */ |
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239 if (surface->flags & SDL_RLEACCEL) { |
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240 SDL_UnRLESurface(surface, 1); |
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241 } |
0 | 242 |
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243 if (flag) { |
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244 surface->flags |= SDL_SRCCOLORKEY; |
2257
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245 surface->map->ckey = key; |
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246 if (flag & SDL_RLEACCELOK) { |
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247 surface->flags |= SDL_RLEACCELOK; |
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248 } else { |
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249 surface->flags &= ~SDL_RLEACCELOK; |
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250 } |
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251 } else { |
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252 surface->flags &= ~(SDL_SRCCOLORKEY | SDL_RLEACCELOK); |
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253 surface->map->ckey = 0; |
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254 } |
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255 SDL_InvalidateMap(surface->map); |
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256 return (0); |
0 | 257 } |
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258 |
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259 /* This function sets the alpha channel of a surface */ |
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260 int |
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261 SDL_SetAlpha(SDL_Surface * surface, Uint32 flag, Uint8 value) |
0 | 262 { |
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263 Uint32 oldflags = surface->flags; |
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264 Uint32 oldalpha = (surface->map->cmod >> 24); |
0 | 265 |
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266 /* Sanity check the flag as it gets passed in */ |
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267 if (flag & SDL_SRCALPHA) { |
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268 if (flag & (SDL_RLEACCEL | SDL_RLEACCELOK)) { |
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269 flag = (SDL_SRCALPHA | SDL_RLEACCELOK); |
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270 } else { |
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271 flag = SDL_SRCALPHA; |
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272 } |
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273 } else { |
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274 flag = 0; |
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275 } |
0 | 276 |
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277 /* Optimize away operations that don't change anything */ |
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278 if ((flag == (surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK))) && |
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279 (!flag || value == oldalpha)) { |
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280 return (0); |
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281 } |
0 | 282 |
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283 if (!(flag & SDL_RLEACCELOK) && (surface->flags & SDL_RLEACCEL)) |
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284 SDL_UnRLESurface(surface, 1); |
0 | 285 |
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286 if (flag) { |
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287 surface->flags |= SDL_SRCALPHA; |
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288 surface->map->cmod &= 0x00FFFFFF; |
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289 surface->map->cmod |= ((Uint32)value << 24); |
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290 if (flag & SDL_RLEACCELOK) { |
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291 surface->flags |= SDL_RLEACCELOK; |
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292 } else { |
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293 surface->flags &= ~SDL_RLEACCELOK; |
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294 } |
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295 } else { |
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296 surface->flags &= ~SDL_SRCALPHA; |
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297 surface->map->cmod |= 0xFF000000; |
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298 } |
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299 /* |
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300 * The representation for software surfaces is independent of |
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301 * per-surface alpha, so no need to invalidate the blit mapping |
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302 * if just the alpha value was changed. (If either is 255, we still |
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303 * need to invalidate.) |
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304 */ |
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305 if (oldflags != surface->flags |
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306 || (((oldalpha + 1) ^ (value + 1)) & 0x100)) { |
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307 SDL_InvalidateMap(surface->map); |
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308 } |
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309 return (0); |
0 | 310 } |
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311 |
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312 int |
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313 SDL_SetAlphaChannel(SDL_Surface * surface, Uint8 value) |
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314 { |
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315 int row, col; |
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316 int offset; |
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317 Uint8 *buf; |
431
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318 |
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319 if ((surface->format->Amask != 0xFF000000) && |
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320 (surface->format->Amask != 0x000000FF)) { |
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321 SDL_SetError("Unsupported surface alpha mask format"); |
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322 return -1; |
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323 } |
431
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324 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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325 if (surface->format->Amask == 0xFF000000) { |
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326 offset = 3; |
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327 } else { |
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328 offset = 0; |
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329 } |
431
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330 #else |
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331 if (surface->format->Amask == 0xFF000000) { |
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332 offset = 0; |
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333 } else { |
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334 offset = 3; |
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335 } |
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336 #endif /* Byte ordering */ |
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337 |
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338 /* Quickly set the alpha channel of an RGBA or ARGB surface */ |
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339 if (SDL_MUSTLOCK(surface)) { |
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340 if (SDL_LockSurface(surface) < 0) { |
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341 return -1; |
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342 } |
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343 } |
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344 row = surface->h; |
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345 while (row--) { |
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346 col = surface->w; |
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347 buf = (Uint8 *) surface->pixels + row * surface->pitch + offset; |
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348 while (col--) { |
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349 *buf = value; |
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350 buf += 4; |
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351 } |
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352 } |
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353 if (SDL_MUSTLOCK(surface)) { |
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354 SDL_UnlockSurface(surface); |
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355 } |
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356 return 0; |
431
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357 } |
0 | 358 |
359 /* | |
360 * Set the clipping rectangle for a blittable surface | |
361 */ | |
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362 SDL_bool |
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363 SDL_SetClipRect(SDL_Surface * surface, const SDL_Rect * rect) |
0 | 364 { |
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365 SDL_Rect full_rect; |
0 | 366 |
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367 /* Don't do anything if there's no surface to act on */ |
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368 if (!surface) { |
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369 return SDL_FALSE; |
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370 } |
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371 |
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372 /* Set up the full surface rectangle */ |
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373 full_rect.x = 0; |
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374 full_rect.y = 0; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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375 full_rect.w = surface->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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376 full_rect.h = surface->h; |
0 | 377 |
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378 /* Set the clipping rectangle */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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379 if (!rect) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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380 surface->clip_rect = full_rect; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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381 return 1; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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382 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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383 return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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384 } |
0 | 385 |
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386 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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387 SDL_GetClipRect(SDL_Surface * surface, SDL_Rect * rect) |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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388 { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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389 if (surface && rect) { |
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390 *rect = surface->clip_rect; |
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391 } |
0 | 392 } |
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393 |
0 | 394 /* |
395 * Set up a blit between two surfaces -- split into three parts: | |
396 * The upper part, SDL_UpperBlit(), performs clipping and rectangle | |
397 * verification. The lower part is a pointer to a low level | |
398 * accelerated blitting function. | |
399 * | |
400 * These parts are separated out and each used internally by this | |
401 * library in the optimimum places. They are exported so that if | |
402 * you know exactly what you are doing, you can optimize your code | |
403 * by calling the one(s) you need. | |
404 */ | |
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405 int |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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406 SDL_LowerBlit(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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407 SDL_Surface * dst, SDL_Rect * dstrect) |
0 | 408 { |
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409 /* Check to make sure the blit mapping is valid */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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410 if ((src->map->dst != 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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411 (src->map->dst->format_version != src->map->format_version)) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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412 if (SDL_MapSurface(src, dst) < 0) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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413 return (-1); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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414 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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415 } |
2257
340942cfda48
Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
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416 return (src->map->blit(src, srcrect, dst, dstrect)); |
0 | 417 } |
418 | |
419 | |
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420 int |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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421 SDL_UpperBlit(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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422 SDL_Surface * dst, SDL_Rect * dstrect) |
0 | 423 { |
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424 SDL_Rect fulldst; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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425 int srcx, srcy, w, h; |
0 | 426 |
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427 /* Make sure the surfaces aren't locked */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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428 if (!src || !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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429 SDL_SetError("SDL_UpperBlit: passed a NULL surface"); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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430 return (-1); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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431 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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432 if (src->locked || dst->locked) { |
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433 SDL_SetError("Surfaces must not be locked during blit"); |
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434 return (-1); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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435 } |
0 | 436 |
1895
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437 /* If the destination rectangle is NULL, use the entire dest surface */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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438 if (dstrect == NULL) { |
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439 fulldst.x = fulldst.y = 0; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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440 dstrect = &fulldst; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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441 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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442 |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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443 /* clip the source rectangle to the source surface */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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444 if (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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445 int maxw, maxh; |
0 | 446 |
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447 srcx = srcrect->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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448 w = srcrect->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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449 if (srcx < 0) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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450 w += srcx; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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451 dstrect->x -= srcx; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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452 srcx = 0; |
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453 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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454 maxw = src->w - srcx; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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455 if (maxw < 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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456 w = maxw; |
0 | 457 |
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458 srcy = srcrect->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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459 h = srcrect->h; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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460 if (srcy < 0) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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461 h += srcy; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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462 dstrect->y -= srcy; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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463 srcy = 0; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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464 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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465 maxh = src->h - srcy; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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466 if (maxh < h) |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
467 h = maxh; |
0 | 468 |
1895
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469 } else { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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470 srcx = srcy = 0; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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471 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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|
472 h = src->h; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
473 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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474 |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
475 /* clip the destination rectangle against the clip rectangle */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
476 { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
477 SDL_Rect *clip = &dst->clip_rect; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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478 int dx, dy; |
0 | 479 |
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480 dx = clip->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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481 if (dx > 0) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
482 w -= dx; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
483 dstrect->x += dx; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
484 srcx += dx; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
485 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
486 dx = dstrect->x + w - clip->x - clip->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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|
487 if (dx > 0) |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
488 w -= dx; |
0 | 489 |
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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|
490 dy = clip->y - dstrect->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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|
491 if (dy > 0) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
492 h -= dy; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
493 dstrect->y += dy; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
494 srcy += dy; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
495 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
496 dy = dstrect->y + h - clip->y - clip->h; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
497 if (dy > 0) |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
498 h -= dy; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
499 } |
0 | 500 |
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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|
501 if (w > 0 && h > 0) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
502 SDL_Rect sr; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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503 sr.x = srcx; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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504 sr.y = srcy; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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505 sr.w = dstrect->w = 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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506 sr.h = dstrect->h = h; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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507 return SDL_LowerBlit(src, &sr, dst, dstrect); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
508 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
509 dstrect->w = dstrect->h = 0; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
510 return 0; |
0 | 511 } |
512 | |
513 /* | |
514 * Lock a surface to directly access the pixels | |
515 */ | |
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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parents:
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diff
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|
516 int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
517 SDL_LockSurface(SDL_Surface * surface) |
0 | 518 { |
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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|
519 if (!surface->locked) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
520 /* Perform the lock */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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521 if (surface->flags & SDL_RLEACCEL) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
522 SDL_UnRLESurface(surface, 1); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
523 surface->flags |= SDL_RLEACCEL; /* save accel'd state */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
524 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
525 } |
0 | 526 |
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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|
527 /* Increment the surface lock count, for recursive locks */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
528 ++surface->locked; |
0 | 529 |
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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|
530 /* Ready to go.. */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
531 return (0); |
0 | 532 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
533 |
0 | 534 /* |
535 * Unlock a previously locked surface | |
536 */ | |
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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|
537 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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|
538 SDL_UnlockSurface(SDL_Surface * surface) |
0 | 539 { |
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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|
540 /* Only perform an unlock if we are locked */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
541 if (!surface->locked || (--surface->locked > 0)) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
542 return; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
543 } |
0 | 544 |
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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changeset
|
545 /* Update RLE encoded surface with new data */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
546 if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
547 surface->flags &= ~SDL_RLEACCEL; /* stop lying */ |
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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 SDL_RLESurface(surface); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
549 } |
0 | 550 } |
551 | |
552 /* | |
553 * Convert a surface into the specified pixel format. | |
554 */ | |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
555 SDL_Surface * |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
556 SDL_ConvertSurface(SDL_Surface * surface, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
557 SDL_PixelFormat * format, Uint32 flags) |
0 | 558 { |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
559 SDL_Surface *convert; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
560 Uint32 colorkey = 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
|
561 Uint8 alpha = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
562 Uint32 surface_flags; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
563 SDL_Rect bounds; |
0 | 564 |
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
565 /* Check for empty destination palette! (results in empty image) */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
566 if (format->palette != NULL) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
567 int i; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
568 for (i = 0; i < format->palette->ncolors; ++i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
569 if ((format->palette->colors[i].r != 0xFF) || |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
570 (format->palette->colors[i].g != 0xFF) || |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
571 (format->palette->colors[i].b != 0xFF)) |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
572 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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|
573 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
574 if (i == format->palette->ncolors) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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diff
changeset
|
575 SDL_SetError("Empty destination palette"); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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changeset
|
576 return (NULL); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
577 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
578 } |
264
c9cd3b564e4b
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
579 |
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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|
580 /* Create a new surface with the desired format */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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changeset
|
581 convert = SDL_CreateRGBSurface(flags, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
582 surface->w, surface->h, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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changeset
|
583 format->BitsPerPixel, format->Rmask, |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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|
584 format->Gmask, format->Bmask, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
585 format->Amask); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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|
586 if (convert == NULL) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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|
587 return (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
|
588 } |
0 | 589 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
590 /* Copy the palette if any */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
1456
diff
changeset
|
591 if (format->palette && convert->format->palette) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
1456
diff
changeset
|
592 SDL_memcpy(convert->format->palette->colors, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
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changeset
|
593 format->palette->colors, |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
594 format->palette->ncolors * sizeof(SDL_Color)); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
595 convert->format->palette->ncolors = format->palette->ncolors; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
596 } |
0 | 597 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
598 /* Save the original surface color key and alpha */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
599 surface_flags = surface->flags; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
600 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
|
601 /* Convert colourkeyed surfaces to RGBA if requested */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
602 if ((flags & SDL_SRCCOLORKEY) != SDL_SRCCOLORKEY && 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
|
603 surface_flags &= ~SDL_SRCCOLORKEY; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
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|
604 } else { |
2257
340942cfda48
Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
parents:
2253
diff
changeset
|
605 colorkey = surface->map->ckey; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
1456
diff
changeset
|
606 SDL_SetColorKey(surface, 0, 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
|
607 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
608 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
609 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>
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diff
changeset
|
610 /* Copy over the alpha channel to RGBA if requested */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
611 if (format->Amask) { |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
612 surface->flags &= ~SDL_SRCALPHA; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
613 } else { |
2257
340942cfda48
Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
parents:
2253
diff
changeset
|
614 alpha = (Uint8)(surface->map->cmod >> 24); |
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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changeset
|
615 SDL_SetAlpha(surface, 0, 0); |
c121d94672cb
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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|
616 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
617 } |
0 | 618 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
619 /* Copy over the image data */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
620 bounds.x = 0; |
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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
|
621 bounds.y = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
622 bounds.w = surface->w; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
623 bounds.h = surface->h; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
624 SDL_LowerBlit(surface, &bounds, convert, &bounds); |
0 | 625 |
1895
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changeset
|
626 /* Clean up the original surface, and update converted surface */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
627 if (convert != NULL) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
628 SDL_SetClipRect(convert, &surface->clip_rect); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
629 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
630 if ((surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) { |
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631 Uint32 cflags = surface_flags & (SDL_SRCCOLORKEY | SDL_RLEACCELOK); |
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632 if (convert != NULL) { |
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633 Uint8 keyR, keyG, keyB; |
0 | 634 |
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635 SDL_GetRGB(colorkey, surface->format, &keyR, &keyG, &keyB); |
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636 SDL_SetColorKey(convert, cflags | (flags & SDL_RLEACCELOK), |
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637 SDL_MapRGB(convert->format, keyR, keyG, keyB)); |
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638 } |
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639 SDL_SetColorKey(surface, cflags, colorkey); |
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640 } |
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641 if ((surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA) { |
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642 Uint32 aflags = surface_flags & (SDL_SRCALPHA | SDL_RLEACCELOK); |
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643 if (convert != NULL) { |
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644 SDL_SetAlpha(convert, aflags | (flags & SDL_RLEACCELOK), alpha); |
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645 } |
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646 if (format->Amask) { |
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647 surface->flags |= SDL_SRCALPHA; |
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648 } else { |
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649 SDL_SetAlpha(surface, aflags, alpha); |
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650 } |
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651 } |
0 | 652 |
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653 /* We're ready to go! */ |
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654 return (convert); |
0 | 655 } |
656 | |
657 /* | |
658 * Free a surface created by the above function. | |
659 */ | |
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660 void |
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661 SDL_FreeSurface(SDL_Surface * surface) |
0 | 662 { |
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663 if (surface == NULL) { |
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664 return; |
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665 } |
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666 if (--surface->refcount > 0) { |
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667 return; |
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668 } |
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669 while (surface->locked > 0) { |
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670 SDL_UnlockSurface(surface); |
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671 } |
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672 if (surface->flags & SDL_RLEACCEL) { |
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673 SDL_UnRLESurface(surface, 0); |
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674 } |
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675 if (surface->format) { |
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676 SDL_SetSurfacePalette(surface, NULL); |
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677 SDL_FreeFormat(surface->format); |
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678 surface->format = NULL; |
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679 } |
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680 if (surface->map != NULL) { |
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681 SDL_FreeBlitMap(surface->map); |
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682 surface->map = NULL; |
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683 } |
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684 if (surface->pixels && ((surface->flags & SDL_PREALLOC) != SDL_PREALLOC)) { |
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685 SDL_free(surface->pixels); |
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686 } |
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687 SDL_free(surface); |
0 | 688 #ifdef CHECK_LEAKS |
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689 --surfaces_allocated; |
0 | 690 #endif |
691 } | |
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692 |
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693 /* vi: set ts=4 sw=4 expandtab: */ |