Mercurial > sdl-ios-xcode
annotate src/video/SDL_surface.c @ 1338:604d73db6802
Removed uses of stdlib.h and string.h
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 07 Feb 2006 09:29:18 +0000 |
| parents | 3692456e7b0f |
| children | c71e05b4dc2e |
| rev | line source |
|---|---|
| 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 */ |
| 22 | |
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23 #include "SDL_stdlib.h" |
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24 #include "SDL_string.h" |
| 0 | 25 #include "SDL_error.h" |
| 26 #include "SDL_video.h" | |
| 27 #include "SDL_sysvideo.h" | |
| 28 #include "SDL_cursor_c.h" | |
| 29 #include "SDL_blit.h" | |
| 30 #include "SDL_RLEaccel_c.h" | |
| 31 #include "SDL_pixels_c.h" | |
| 32 #include "SDL_leaks.h" | |
| 33 | |
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34 |
| 0 | 35 /* Public routines */ |
| 36 /* | |
| 37 * Create an empty RGB surface of the appropriate depth | |
| 38 */ | |
| 39 SDL_Surface * SDL_CreateRGBSurface (Uint32 flags, | |
| 40 int width, int height, int depth, | |
| 41 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) | |
| 42 { | |
| 43 SDL_VideoDevice *video = current_video; | |
| 44 SDL_VideoDevice *this = current_video; | |
| 45 SDL_Surface *screen; | |
| 46 SDL_Surface *surface; | |
| 47 | |
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48 /* Make sure the size requested doesn't overflow our datatypes */ |
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49 /* Next time I write a library like SDL, I'll use int for size. :) */ |
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50 if ( width >= 16384 || height >= 65536 ) { |
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51 SDL_SetError("Width or height is too large"); |
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52 return(NULL); |
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53 } |
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54 |
| 0 | 55 /* Check to see if we desire the surface in video memory */ |
| 56 if ( video ) { | |
| 57 screen = SDL_PublicSurface; | |
| 58 } else { | |
| 59 screen = NULL; | |
| 60 } | |
| 61 if ( screen && ((screen->flags&SDL_HWSURFACE) == SDL_HWSURFACE) ) { | |
| 62 if ( (flags&(SDL_SRCCOLORKEY|SDL_SRCALPHA)) != 0 ) { | |
| 63 flags |= SDL_HWSURFACE; | |
| 64 } | |
| 65 if ( (flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 66 if ( ! current_video->info.blit_hw_CC ) { | |
| 67 flags &= ~SDL_HWSURFACE; | |
| 68 } | |
| 69 } | |
| 70 if ( (flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
| 71 if ( ! current_video->info.blit_hw_A ) { | |
| 72 flags &= ~SDL_HWSURFACE; | |
| 73 } | |
| 74 } | |
| 75 } else { | |
| 76 flags &= ~SDL_HWSURFACE; | |
| 77 } | |
| 78 | |
| 79 /* Allocate the surface */ | |
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80 surface = (SDL_Surface *)SDL_malloc(sizeof(*surface)); |
| 0 | 81 if ( surface == NULL ) { |
| 82 SDL_OutOfMemory(); | |
| 83 return(NULL); | |
| 84 } | |
| 85 surface->flags = SDL_SWSURFACE; | |
| 86 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
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87 if ((Amask) && (video->displayformatalphapixel)) |
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88 { |
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89 depth = video->displayformatalphapixel->BitsPerPixel; |
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90 Rmask = video->displayformatalphapixel->Rmask; |
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91 Gmask = video->displayformatalphapixel->Gmask; |
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92 Bmask = video->displayformatalphapixel->Bmask; |
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93 Amask = video->displayformatalphapixel->Amask; |
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94 } |
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95 else |
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96 { |
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97 depth = screen->format->BitsPerPixel; |
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98 Rmask = screen->format->Rmask; |
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99 Gmask = screen->format->Gmask; |
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100 Bmask = screen->format->Bmask; |
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101 Amask = screen->format->Amask; |
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102 } |
| 0 | 103 } |
| 104 surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask); | |
| 105 if ( surface->format == NULL ) { | |
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106 SDL_free(surface); |
| 0 | 107 return(NULL); |
| 108 } | |
| 109 if ( Amask ) { | |
| 110 surface->flags |= SDL_SRCALPHA; | |
| 111 } | |
| 112 surface->w = width; | |
| 113 surface->h = height; | |
| 114 surface->pitch = SDL_CalculatePitch(surface); | |
| 115 surface->pixels = NULL; | |
| 116 surface->offset = 0; | |
| 117 surface->hwdata = NULL; | |
| 118 surface->locked = 0; | |
| 119 surface->map = NULL; | |
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120 surface->unused1 = 0; |
| 0 | 121 SDL_SetClipRect(surface, NULL); |
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122 SDL_FormatChanged(surface); |
| 0 | 123 |
| 124 /* Get the pixels */ | |
| 125 if ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) || | |
| 126 (video->AllocHWSurface(this, surface) < 0) ) { | |
| 127 if ( surface->w && surface->h ) { | |
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128 surface->pixels = SDL_malloc(surface->h*surface->pitch); |
| 0 | 129 if ( surface->pixels == NULL ) { |
| 130 SDL_FreeSurface(surface); | |
| 131 SDL_OutOfMemory(); | |
| 132 return(NULL); | |
| 133 } | |
| 134 /* This is important for bitmaps */ | |
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135 SDL_memset(surface->pixels, 0, surface->h*surface->pitch); |
| 0 | 136 } |
| 137 } | |
| 138 | |
| 139 /* Allocate an empty mapping */ | |
| 140 surface->map = SDL_AllocBlitMap(); | |
| 141 if ( surface->map == NULL ) { | |
| 142 SDL_FreeSurface(surface); | |
| 143 return(NULL); | |
| 144 } | |
| 145 | |
| 146 /* The surface is ready to go */ | |
| 147 surface->refcount = 1; | |
| 148 #ifdef CHECK_LEAKS | |
| 149 ++surfaces_allocated; | |
| 150 #endif | |
| 151 return(surface); | |
| 152 } | |
| 153 /* | |
| 154 * Create an RGB surface from an existing memory buffer | |
| 155 */ | |
| 156 SDL_Surface * SDL_CreateRGBSurfaceFrom (void *pixels, | |
| 157 int width, int height, int depth, int pitch, | |
| 158 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) | |
| 159 { | |
| 160 SDL_Surface *surface; | |
| 161 | |
| 162 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, 0, 0, depth, | |
| 163 Rmask, Gmask, Bmask, Amask); | |
| 164 if ( surface != NULL ) { | |
| 165 surface->flags |= SDL_PREALLOC; | |
| 166 surface->pixels = pixels; | |
| 167 surface->w = width; | |
| 168 surface->h = height; | |
| 169 surface->pitch = pitch; | |
| 170 SDL_SetClipRect(surface, NULL); | |
| 171 } | |
| 172 return(surface); | |
| 173 } | |
| 174 /* | |
| 175 * Set the color key in a blittable surface | |
| 176 */ | |
| 177 int SDL_SetColorKey (SDL_Surface *surface, Uint32 flag, Uint32 key) | |
| 178 { | |
| 179 /* Sanity check the flag as it gets passed in */ | |
| 180 if ( flag & SDL_SRCCOLORKEY ) { | |
| 181 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
| 182 flag = (SDL_SRCCOLORKEY | SDL_RLEACCELOK); | |
| 183 } else { | |
| 184 flag = SDL_SRCCOLORKEY; | |
| 185 } | |
| 186 } else { | |
| 187 flag = 0; | |
| 188 } | |
| 189 | |
| 190 /* Optimize away operations that don't change anything */ | |
| 191 if ( (flag == (surface->flags & (SDL_SRCCOLORKEY|SDL_RLEACCELOK))) && | |
| 192 (key == surface->format->colorkey) ) { | |
| 193 return(0); | |
| 194 } | |
| 195 | |
| 196 /* UnRLE surfaces before we change the colorkey */ | |
| 197 if ( surface->flags & SDL_RLEACCEL ) { | |
| 198 SDL_UnRLESurface(surface, 1); | |
| 199 } | |
| 200 | |
| 201 if ( flag ) { | |
| 202 SDL_VideoDevice *video = current_video; | |
| 203 SDL_VideoDevice *this = current_video; | |
| 204 | |
| 205 | |
| 206 surface->flags |= SDL_SRCCOLORKEY; | |
| 207 surface->format->colorkey = key; | |
| 208 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 209 if ( (video->SetHWColorKey == NULL) || | |
| 210 (video->SetHWColorKey(this, surface, key) < 0) ) { | |
| 211 surface->flags &= ~SDL_HWACCEL; | |
| 212 } | |
| 213 } | |
| 214 if ( flag & SDL_RLEACCELOK ) { | |
| 215 surface->flags |= SDL_RLEACCELOK; | |
| 216 } else { | |
| 217 surface->flags &= ~SDL_RLEACCELOK; | |
| 218 } | |
| 219 } else { | |
| 220 surface->flags &= ~(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
| 221 surface->format->colorkey = 0; | |
| 222 } | |
| 223 SDL_InvalidateMap(surface->map); | |
| 224 return(0); | |
| 225 } | |
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226 /* This function sets the alpha channel of a surface */ |
| 0 | 227 int SDL_SetAlpha (SDL_Surface *surface, Uint32 flag, Uint8 value) |
| 228 { | |
| 229 Uint32 oldflags = surface->flags; | |
| 230 Uint32 oldalpha = surface->format->alpha; | |
| 231 | |
| 232 /* Sanity check the flag as it gets passed in */ | |
| 233 if ( flag & SDL_SRCALPHA ) { | |
| 234 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
| 235 flag = (SDL_SRCALPHA | SDL_RLEACCELOK); | |
| 236 } else { | |
| 237 flag = SDL_SRCALPHA; | |
| 238 } | |
| 239 } else { | |
| 240 flag = 0; | |
| 241 } | |
| 242 | |
| 243 /* Optimize away operations that don't change anything */ | |
| 244 if ( (flag == (surface->flags & (SDL_SRCALPHA|SDL_RLEACCELOK))) && | |
| 245 (!flag || value == oldalpha) ) { | |
| 246 return(0); | |
| 247 } | |
| 248 | |
| 249 if(!(flag & SDL_RLEACCELOK) && (surface->flags & SDL_RLEACCEL)) | |
| 250 SDL_UnRLESurface(surface, 1); | |
| 251 | |
| 252 if ( flag ) { | |
| 253 SDL_VideoDevice *video = current_video; | |
| 254 SDL_VideoDevice *this = current_video; | |
| 255 | |
| 256 surface->flags |= SDL_SRCALPHA; | |
| 257 surface->format->alpha = value; | |
| 258 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 259 if ( (video->SetHWAlpha == NULL) || | |
| 260 (video->SetHWAlpha(this, surface, value) < 0) ) { | |
| 261 surface->flags &= ~SDL_HWACCEL; | |
| 262 } | |
| 263 } | |
| 264 if ( flag & SDL_RLEACCELOK ) { | |
| 265 surface->flags |= SDL_RLEACCELOK; | |
| 266 } else { | |
| 267 surface->flags &= ~SDL_RLEACCELOK; | |
| 268 } | |
| 269 } else { | |
| 270 surface->flags &= ~SDL_SRCALPHA; | |
| 271 surface->format->alpha = SDL_ALPHA_OPAQUE; | |
| 272 } | |
| 273 /* | |
| 274 * The representation for software surfaces is independent of | |
| 275 * per-surface alpha, so no need to invalidate the blit mapping | |
| 276 * if just the alpha value was changed. (If either is 255, we still | |
| 277 * need to invalidate.) | |
| 278 */ | |
| 279 if((surface->flags & SDL_HWACCEL) == SDL_HWACCEL | |
| 280 || oldflags != surface->flags | |
| 281 || (((oldalpha + 1) ^ (value + 1)) & 0x100)) | |
| 282 SDL_InvalidateMap(surface->map); | |
| 283 return(0); | |
| 284 } | |
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285 int SDL_SetAlphaChannel(SDL_Surface *surface, Uint8 value) |
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286 { |
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287 int row, col; |
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288 int offset; |
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289 Uint8 *buf; |
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290 |
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291 if ( (surface->format->Amask != 0xFF000000) && |
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292 (surface->format->Amask != 0x000000FF) ) { |
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293 SDL_SetError("Unsupported surface alpha mask format"); |
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294 return -1; |
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295 } |
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296 |
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297 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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298 if ( surface->format->Amask == 0xFF000000 ) { |
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299 offset = 3; |
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300 } else { |
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301 offset = 0; |
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302 } |
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303 #else |
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304 if ( surface->format->Amask == 0xFF000000 ) { |
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305 offset = 0; |
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306 } else { |
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307 offset = 3; |
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308 } |
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309 #endif /* Byte ordering */ |
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310 |
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311 /* Quickly set the alpha channel of an RGBA or ARGB surface */ |
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312 if ( SDL_MUSTLOCK(surface) ) { |
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313 if ( SDL_LockSurface(surface) < 0 ) { |
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314 return -1; |
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315 } |
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316 } |
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317 row = surface->h; |
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318 while (row--) { |
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319 col = surface->w; |
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320 buf = (Uint8 *)surface->pixels + row * surface->pitch + offset; |
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321 while(col--) { |
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322 *buf = value; |
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323 buf += 4; |
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324 } |
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325 } |
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326 if ( SDL_MUSTLOCK(surface) ) { |
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327 SDL_UnlockSurface(surface); |
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328 } |
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329 return 0; |
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330 } |
| 0 | 331 |
| 332 /* | |
| 333 * A function to calculate the intersection of two rectangles: | |
| 334 * return true if the rectangles intersect, false otherwise | |
| 335 */ | |
| 336 static __inline__ | |
|
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337 SDL_bool SDL_IntersectRect(const SDL_Rect *A, const SDL_Rect *B, SDL_Rect *intersection) |
| 0 | 338 { |
| 339 int Amin, Amax, Bmin, Bmax; | |
| 340 | |
| 341 /* Horizontal intersection */ | |
| 342 Amin = A->x; | |
| 343 Amax = Amin + A->w; | |
| 344 Bmin = B->x; | |
| 345 Bmax = Bmin + B->w; | |
| 346 if(Bmin > Amin) | |
| 347 Amin = Bmin; | |
| 348 intersection->x = Amin; | |
| 349 if(Bmax < Amax) | |
| 350 Amax = Bmax; | |
| 351 intersection->w = Amax - Amin > 0 ? Amax - Amin : 0; | |
| 352 | |
| 353 /* Vertical intersection */ | |
| 354 Amin = A->y; | |
| 355 Amax = Amin + A->h; | |
| 356 Bmin = B->y; | |
| 357 Bmax = Bmin + B->h; | |
| 358 if(Bmin > Amin) | |
| 359 Amin = Bmin; | |
| 360 intersection->y = Amin; | |
| 361 if(Bmax < Amax) | |
| 362 Amax = Bmax; | |
| 363 intersection->h = Amax - Amin > 0 ? Amax - Amin : 0; | |
| 364 | |
| 365 return (intersection->w && intersection->h); | |
| 366 } | |
| 367 /* | |
| 368 * Set the clipping rectangle for a blittable surface | |
| 369 */ | |
|
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370 SDL_bool SDL_SetClipRect(SDL_Surface *surface, const SDL_Rect *rect) |
| 0 | 371 { |
| 372 SDL_Rect full_rect; | |
| 373 | |
| 374 /* Don't do anything if there's no surface to act on */ | |
| 375 if ( ! surface ) { | |
| 376 return SDL_FALSE; | |
| 377 } | |
| 378 | |
| 379 /* Set up the full surface rectangle */ | |
| 380 full_rect.x = 0; | |
| 381 full_rect.y = 0; | |
| 382 full_rect.w = surface->w; | |
| 383 full_rect.h = surface->h; | |
| 384 | |
| 385 /* Set the clipping rectangle */ | |
| 386 if ( ! rect ) { | |
| 387 surface->clip_rect = full_rect; | |
| 388 return 1; | |
| 389 } | |
| 390 return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect); | |
| 391 } | |
| 392 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect) | |
| 393 { | |
| 394 if ( surface && rect ) { | |
| 395 *rect = surface->clip_rect; | |
| 396 } | |
| 397 } | |
| 398 /* | |
| 399 * Set up a blit between two surfaces -- split into three parts: | |
| 400 * The upper part, SDL_UpperBlit(), performs clipping and rectangle | |
| 401 * verification. The lower part is a pointer to a low level | |
| 402 * accelerated blitting function. | |
| 403 * | |
| 404 * These parts are separated out and each used internally by this | |
| 405 * library in the optimimum places. They are exported so that if | |
| 406 * you know exactly what you are doing, you can optimize your code | |
| 407 * by calling the one(s) you need. | |
| 408 */ | |
| 409 int SDL_LowerBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
| 410 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 411 { | |
| 412 SDL_blit do_blit; | |
|
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413 SDL_Rect hw_srcrect; |
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414 SDL_Rect hw_dstrect; |
| 0 | 415 |
| 416 /* Check to make sure the blit mapping is valid */ | |
| 417 if ( (src->map->dst != dst) || | |
| 418 (src->map->dst->format_version != src->map->format_version) ) { | |
| 419 if ( SDL_MapSurface(src, dst) < 0 ) { | |
| 420 return(-1); | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 /* Figure out which blitter to use */ | |
| 425 if ( (src->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
|
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426 if ( src == SDL_VideoSurface ) { |
|
519
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427 hw_srcrect = *srcrect; |
|
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428 hw_srcrect.x += current_video->offset_x; |
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429 hw_srcrect.y += current_video->offset_y; |
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430 srcrect = &hw_srcrect; |
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431 } |
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432 if ( dst == SDL_VideoSurface ) { |
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433 hw_dstrect = *dstrect; |
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434 hw_dstrect.x += current_video->offset_x; |
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435 hw_dstrect.y += current_video->offset_y; |
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436 dstrect = &hw_dstrect; |
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437 } |
| 0 | 438 do_blit = src->map->hw_blit; |
| 439 } else { | |
| 440 do_blit = src->map->sw_blit; | |
| 441 } | |
| 442 return(do_blit(src, srcrect, dst, dstrect)); | |
| 443 } | |
| 444 | |
| 445 | |
| 446 int SDL_UpperBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
| 447 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 448 { | |
| 449 SDL_Rect fulldst; | |
| 450 int srcx, srcy, w, h; | |
| 451 | |
| 452 /* Make sure the surfaces aren't locked */ | |
| 453 if ( ! src || ! dst ) { | |
| 454 SDL_SetError("SDL_UpperBlit: passed a NULL surface"); | |
| 455 return(-1); | |
| 456 } | |
| 457 if ( src->locked || dst->locked ) { | |
| 458 SDL_SetError("Surfaces must not be locked during blit"); | |
| 459 return(-1); | |
| 460 } | |
| 461 | |
| 462 /* If the destination rectangle is NULL, use the entire dest surface */ | |
| 463 if ( dstrect == NULL ) { | |
| 464 fulldst.x = fulldst.y = 0; | |
| 465 dstrect = &fulldst; | |
| 466 } | |
| 467 | |
| 468 /* clip the source rectangle to the source surface */ | |
| 469 if(srcrect) { | |
| 470 int maxw, maxh; | |
| 471 | |
| 472 srcx = srcrect->x; | |
| 473 w = srcrect->w; | |
| 474 if(srcx < 0) { | |
| 475 w += srcx; | |
| 476 dstrect->x -= srcx; | |
| 477 srcx = 0; | |
| 478 } | |
| 479 maxw = src->w - srcx; | |
| 480 if(maxw < w) | |
| 481 w = maxw; | |
| 482 | |
| 483 srcy = srcrect->y; | |
| 484 h = srcrect->h; | |
| 485 if(srcy < 0) { | |
| 486 h += srcy; | |
| 487 dstrect->y -= srcy; | |
| 488 srcy = 0; | |
| 489 } | |
| 490 maxh = src->h - srcy; | |
| 491 if(maxh < h) | |
| 492 h = maxh; | |
| 493 | |
| 494 } else { | |
| 495 srcx = srcy = 0; | |
| 496 w = src->w; | |
| 497 h = src->h; | |
| 498 } | |
| 499 | |
| 500 /* clip the destination rectangle against the clip rectangle */ | |
| 501 { | |
| 502 SDL_Rect *clip = &dst->clip_rect; | |
| 503 int dx, dy; | |
| 504 | |
| 505 dx = clip->x - dstrect->x; | |
| 506 if(dx > 0) { | |
| 507 w -= dx; | |
| 508 dstrect->x += dx; | |
| 509 srcx += dx; | |
| 510 } | |
| 511 dx = dstrect->x + w - clip->x - clip->w; | |
| 512 if(dx > 0) | |
| 513 w -= dx; | |
| 514 | |
| 515 dy = clip->y - dstrect->y; | |
| 516 if(dy > 0) { | |
| 517 h -= dy; | |
| 518 dstrect->y += dy; | |
| 519 srcy += dy; | |
| 520 } | |
| 521 dy = dstrect->y + h - clip->y - clip->h; | |
| 522 if(dy > 0) | |
| 523 h -= dy; | |
| 524 } | |
| 525 | |
| 526 if(w > 0 && h > 0) { | |
| 527 SDL_Rect sr; | |
| 528 sr.x = srcx; | |
| 529 sr.y = srcy; | |
| 530 sr.w = dstrect->w = w; | |
| 531 sr.h = dstrect->h = h; | |
| 532 return SDL_LowerBlit(src, &sr, dst, dstrect); | |
| 533 } | |
| 534 dstrect->w = dstrect->h = 0; | |
| 535 return 0; | |
| 536 } | |
| 537 | |
|
532
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538 static int SDL_FillRect1(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) |
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539 { |
|
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540 /* FIXME: We have to worry about packing order.. *sigh* */ |
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541 SDL_SetError("1-bpp rect fill not yet implemented"); |
|
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542 return -1; |
|
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543 } |
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544 |
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545 static int SDL_FillRect4(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) |
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546 { |
|
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547 /* FIXME: We have to worry about packing order.. *sigh* */ |
|
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548 SDL_SetError("4-bpp rect fill not yet implemented"); |
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549 return -1; |
|
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550 } |
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551 |
| 0 | 552 /* |
| 553 * This function performs a fast fill of the given rectangle with 'color' | |
| 554 */ | |
| 555 int SDL_FillRect(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) | |
| 556 { | |
| 557 SDL_VideoDevice *video = current_video; | |
| 558 SDL_VideoDevice *this = current_video; | |
| 559 int x, y; | |
| 560 Uint8 *row; | |
| 561 | |
|
532
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562 /* This function doesn't work on surfaces < 8 bpp */ |
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563 if ( dst->format->BitsPerPixel < 8 ) { |
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564 switch(dst->format->BitsPerPixel) { |
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565 case 1: |
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566 return SDL_FillRect1(dst, dstrect, color); |
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567 break; |
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568 case 4: |
|
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569 return SDL_FillRect4(dst, dstrect, color); |
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570 break; |
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571 default: |
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572 SDL_SetError("Fill rect on unsupported surface format"); |
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573 return(-1); |
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574 break; |
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575 } |
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576 } |
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577 |
| 0 | 578 /* If 'dstrect' == NULL, then fill the whole surface */ |
| 579 if ( dstrect ) { | |
| 580 /* Perform clipping */ | |
| 581 if ( !SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect) ) { | |
| 582 return(0); | |
| 583 } | |
| 584 } else { | |
| 585 dstrect = &dst->clip_rect; | |
| 586 } | |
| 587 | |
| 588 /* Check for hardware acceleration */ | |
| 589 if ( ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) && | |
| 590 video->info.blit_fill ) { | |
|
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591 SDL_Rect hw_rect; |
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592 if ( dst == SDL_VideoSurface ) { |
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593 hw_rect = *dstrect; |
|
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594 hw_rect.x += current_video->offset_x; |
|
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595 hw_rect.y += current_video->offset_y; |
|
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Fixed offset bug in hardware accelerated fills and blits
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596 dstrect = &hw_rect; |
|
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Fixed offset bug in hardware accelerated fills and blits
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597 } |
| 0 | 598 return(video->FillHWRect(this, dst, dstrect, color)); |
| 599 } | |
| 600 | |
| 601 /* Perform software fill */ | |
| 602 if ( SDL_LockSurface(dst) != 0 ) { | |
| 603 return(-1); | |
| 604 } | |
| 605 row = (Uint8 *)dst->pixels+dstrect->y*dst->pitch+ | |
| 606 dstrect->x*dst->format->BytesPerPixel; | |
| 607 if ( dst->format->palette || (color == 0) ) { | |
| 608 x = dstrect->w*dst->format->BytesPerPixel; | |
| 609 if ( !color && !((long)row&3) && !(x&3) && !(dst->pitch&3) ) { | |
| 610 int n = x >> 2; | |
| 611 for ( y=dstrect->h; y; --y ) { | |
| 612 SDL_memset4(row, 0, n); | |
| 613 row += dst->pitch; | |
| 614 } | |
| 615 } else { | |
| 616 #ifdef __powerpc__ | |
| 617 /* | |
|
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618 * SDL_memset() on PPC (both glibc and codewarrior) uses |
| 0 | 619 * the dcbz (Data Cache Block Zero) instruction, which |
| 620 * causes an alignment exception if the destination is | |
| 621 * uncachable, so only use it on software surfaces | |
| 622 */ | |
| 623 if((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) { | |
| 624 if(dstrect->w >= 8) { | |
| 625 /* | |
| 626 * 64-bit stores are probably most | |
| 627 * efficient to uncached video memory | |
| 628 */ | |
| 629 double fill; | |
|
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630 SDL_memset(&fill, color, (sizeof fill)); |
| 0 | 631 for(y = dstrect->h; y; y--) { |
| 632 Uint8 *d = row; | |
| 633 unsigned n = x; | |
| 634 unsigned nn; | |
| 635 Uint8 c = color; | |
| 636 double f = fill; | |
| 637 while((unsigned long)d | |
| 638 & (sizeof(double) - 1)) { | |
| 639 *d++ = c; | |
| 640 n--; | |
| 641 } | |
| 642 nn = n / (sizeof(double) * 4); | |
| 643 while(nn) { | |
| 644 ((double *)d)[0] = f; | |
| 645 ((double *)d)[1] = f; | |
| 646 ((double *)d)[2] = f; | |
| 647 ((double *)d)[3] = f; | |
| 648 d += 4*sizeof(double); | |
| 649 nn--; | |
| 650 } | |
| 651 n &= ~(sizeof(double) * 4 - 1); | |
| 652 nn = n / sizeof(double); | |
| 653 while(nn) { | |
| 654 *(double *)d = f; | |
| 655 d += sizeof(double); | |
| 656 nn--; | |
| 657 } | |
| 658 n &= ~(sizeof(double) - 1); | |
| 659 while(n) { | |
| 660 *d++ = c; | |
| 661 n--; | |
| 662 } | |
| 663 row += dst->pitch; | |
| 664 } | |
| 665 } else { | |
| 666 /* narrow boxes */ | |
| 667 for(y = dstrect->h; y; y--) { | |
| 668 Uint8 *d = row; | |
| 669 Uint8 c = color; | |
| 670 int n = x; | |
| 671 while(n) { | |
| 672 *d++ = c; | |
| 673 n--; | |
| 674 } | |
| 675 row += dst->pitch; | |
| 676 } | |
| 677 } | |
| 678 } else | |
| 679 #endif /* __powerpc__ */ | |
| 680 { | |
| 681 for(y = dstrect->h; y; y--) { | |
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682 SDL_memset(row, color, x); |
| 0 | 683 row += dst->pitch; |
| 684 } | |
| 685 } | |
| 686 } | |
| 687 } else { | |
| 688 switch (dst->format->BytesPerPixel) { | |
| 689 case 2: | |
| 690 for ( y=dstrect->h; y; --y ) { | |
| 691 Uint16 *pixels = (Uint16 *)row; | |
| 692 Uint16 c = color; | |
| 693 Uint32 cc = (Uint32)c << 16 | c; | |
| 694 int n = dstrect->w; | |
| 695 if((unsigned long)pixels & 3) { | |
| 696 *pixels++ = c; | |
| 697 n--; | |
| 698 } | |
| 699 if(n >> 1) | |
| 700 SDL_memset4(pixels, cc, n >> 1); | |
| 701 if(n & 1) | |
| 702 pixels[n - 1] = c; | |
| 703 row += dst->pitch; | |
| 704 } | |
| 705 break; | |
| 706 | |
| 707 case 3: | |
|
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Fixed some compiler warnings about "unreachable code" on Watcom C.
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708 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
| 0 | 709 color <<= 8; |
|
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Fixed some compiler warnings about "unreachable code" on Watcom C.
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710 #endif |
| 0 | 711 for ( y=dstrect->h; y; --y ) { |
| 712 Uint8 *pixels = row; | |
| 713 for ( x=dstrect->w; x; --x ) { | |
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714 SDL_memcpy(pixels, &color, 3); |
| 0 | 715 pixels += 3; |
| 716 } | |
| 717 row += dst->pitch; | |
| 718 } | |
| 719 break; | |
| 720 | |
| 721 case 4: | |
| 722 for(y = dstrect->h; y; --y) { | |
| 723 SDL_memset4(row, color, dstrect->w); | |
| 724 row += dst->pitch; | |
| 725 } | |
| 726 break; | |
| 727 } | |
| 728 } | |
| 729 SDL_UnlockSurface(dst); | |
| 730 | |
| 731 /* We're done! */ | |
| 732 return(0); | |
| 733 } | |
| 734 | |
| 735 /* | |
| 736 * Lock a surface to directly access the pixels | |
| 737 */ | |
| 738 int SDL_LockSurface (SDL_Surface *surface) | |
| 739 { | |
| 740 if ( ! surface->locked ) { | |
| 741 /* Perform the lock */ | |
| 742 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
| 743 SDL_VideoDevice *video = current_video; | |
| 744 SDL_VideoDevice *this = current_video; | |
| 745 if ( video->LockHWSurface(this, surface) < 0 ) { | |
| 746 return(-1); | |
| 747 } | |
| 748 } | |
| 749 if ( surface->flags & SDL_RLEACCEL ) { | |
| 750 SDL_UnRLESurface(surface, 1); | |
| 751 surface->flags |= SDL_RLEACCEL; /* save accel'd state */ | |
| 752 } | |
| 753 /* This needs to be done here in case pixels changes value */ | |
| 754 surface->pixels = (Uint8 *)surface->pixels + surface->offset; | |
| 755 } | |
| 756 | |
| 757 /* Increment the surface lock count, for recursive locks */ | |
| 758 ++surface->locked; | |
| 759 | |
| 760 /* Ready to go.. */ | |
| 761 return(0); | |
| 762 } | |
| 763 /* | |
| 764 * Unlock a previously locked surface | |
| 765 */ | |
| 766 void SDL_UnlockSurface (SDL_Surface *surface) | |
| 767 { | |
| 768 /* Only perform an unlock if we are locked */ | |
| 769 if ( ! surface->locked || (--surface->locked > 0) ) { | |
| 770 return; | |
| 771 } | |
| 772 | |
| 773 /* Perform the unlock */ | |
| 774 surface->pixels = (Uint8 *)surface->pixels - surface->offset; | |
| 775 | |
| 776 /* Unlock hardware or accelerated surfaces */ | |
| 777 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
| 778 SDL_VideoDevice *video = current_video; | |
| 779 SDL_VideoDevice *this = current_video; | |
| 780 video->UnlockHWSurface(this, surface); | |
| 781 } else { | |
| 782 /* Update RLE encoded surface with new data */ | |
| 783 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 784 surface->flags &= ~SDL_RLEACCEL; /* stop lying */ | |
| 785 SDL_RLESurface(surface); | |
| 786 } | |
| 787 } | |
| 788 } | |
| 789 | |
| 790 /* | |
| 791 * Convert a surface into the specified pixel format. | |
| 792 */ | |
| 793 SDL_Surface * SDL_ConvertSurface (SDL_Surface *surface, | |
| 794 SDL_PixelFormat *format, Uint32 flags) | |
| 795 { | |
| 796 SDL_Surface *convert; | |
| 797 Uint32 colorkey = 0; | |
| 798 Uint8 alpha = 0; | |
| 799 Uint32 surface_flags; | |
| 800 SDL_Rect bounds; | |
| 801 | |
| 802 /* Check for empty destination palette! (results in empty image) */ | |
| 803 if ( format->palette != NULL ) { | |
| 804 int i; | |
| 805 for ( i=0; i<format->palette->ncolors; ++i ) { | |
| 806 if ( (format->palette->colors[i].r != 0) || | |
| 807 (format->palette->colors[i].g != 0) || | |
| 808 (format->palette->colors[i].b != 0) ) | |
| 809 break; | |
| 810 } | |
| 811 if ( i == format->palette->ncolors ) { | |
| 812 SDL_SetError("Empty destination palette"); | |
| 813 return(NULL); | |
| 814 } | |
| 815 } | |
| 816 | |
|
264
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817 /* Only create hw surfaces with alpha channel if hw alpha blits |
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818 are supported */ |
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819 if(format->Amask != 0 && (flags & SDL_HWSURFACE)) { |
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820 const SDL_VideoInfo *vi = SDL_GetVideoInfo(); |
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821 if(!vi || !vi->blit_hw_A) |
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822 flags &= ~SDL_HWSURFACE; |
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823 } |
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824 |
| 0 | 825 /* Create a new surface with the desired format */ |
| 826 convert = SDL_CreateRGBSurface(flags, | |
| 827 surface->w, surface->h, format->BitsPerPixel, | |
| 828 format->Rmask, format->Gmask, format->Bmask, format->Amask); | |
| 829 if ( convert == NULL ) { | |
| 830 return(NULL); | |
| 831 } | |
| 832 | |
| 833 /* Copy the palette if any */ | |
| 834 if ( format->palette && convert->format->palette ) { | |
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835 SDL_memcpy(convert->format->palette->colors, |
| 0 | 836 format->palette->colors, |
| 837 format->palette->ncolors*sizeof(SDL_Color)); | |
| 838 convert->format->palette->ncolors = format->palette->ncolors; | |
| 839 } | |
| 840 | |
| 841 /* Save the original surface color key and alpha */ | |
| 842 surface_flags = surface->flags; | |
| 843 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 844 /* Convert colourkeyed surfaces to RGBA if requested */ | |
| 845 if((flags & SDL_SRCCOLORKEY) != SDL_SRCCOLORKEY | |
| 846 && format->Amask) { | |
| 847 surface_flags &= ~SDL_SRCCOLORKEY; | |
| 848 } else { | |
| 849 colorkey = surface->format->colorkey; | |
| 850 SDL_SetColorKey(surface, 0, 0); | |
| 851 } | |
| 852 } | |
| 853 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
|
431
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Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
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854 /* Copy over the alpha channel to RGBA if requested */ |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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|
855 if ( format->Amask ) { |
|
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Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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856 surface->flags &= ~SDL_SRCALPHA; |
|
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Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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857 } else { |
|
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Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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858 alpha = surface->format->alpha; |
|
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Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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859 SDL_SetAlpha(surface, 0, 0); |
|
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860 } |
| 0 | 861 } |
| 862 | |
| 863 /* Copy over the image data */ | |
| 864 bounds.x = 0; | |
| 865 bounds.y = 0; | |
| 866 bounds.w = surface->w; | |
| 867 bounds.h = surface->h; | |
| 868 SDL_LowerBlit(surface, &bounds, convert, &bounds); | |
| 869 | |
| 870 /* Clean up the original surface, and update converted surface */ | |
| 871 if ( convert != NULL ) { | |
| 872 SDL_SetClipRect(convert, &surface->clip_rect); | |
| 873 } | |
| 874 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 875 Uint32 cflags = surface_flags&(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
| 876 if ( convert != NULL ) { | |
| 877 Uint8 keyR, keyG, keyB; | |
| 878 | |
| 879 SDL_GetRGB(colorkey,surface->format,&keyR,&keyG,&keyB); | |
| 880 SDL_SetColorKey(convert, cflags|(flags&SDL_RLEACCELOK), | |
| 881 SDL_MapRGB(convert->format, keyR, keyG, keyB)); | |
| 882 } | |
| 883 SDL_SetColorKey(surface, cflags, colorkey); | |
| 884 } | |
| 885 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
| 886 Uint32 aflags = surface_flags&(SDL_SRCALPHA|SDL_RLEACCELOK); | |
| 887 if ( convert != NULL ) { | |
| 888 SDL_SetAlpha(convert, aflags|(flags&SDL_RLEACCELOK), | |
| 889 alpha); | |
| 890 } | |
|
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Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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|
891 if ( format->Amask ) { |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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892 surface->flags |= SDL_SRCALPHA; |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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893 } else { |
|
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Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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|
894 SDL_SetAlpha(surface, aflags, alpha); |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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|
895 } |
| 0 | 896 } |
| 897 | |
| 898 /* We're ready to go! */ | |
| 899 return(convert); | |
| 900 } | |
| 901 | |
| 902 /* | |
| 903 * Free a surface created by the above function. | |
| 904 */ | |
| 905 void SDL_FreeSurface (SDL_Surface *surface) | |
| 906 { | |
| 907 /* Free anything that's not NULL, and not the screen surface */ | |
| 908 if ((surface == NULL) || | |
| 909 (current_video && | |
| 910 ((surface == SDL_ShadowSurface)||(surface == SDL_VideoSurface)))) { | |
| 911 return; | |
| 912 } | |
| 913 if ( --surface->refcount > 0 ) { | |
| 914 return; | |
| 915 } | |
|
915
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You can't free locked surfaces!
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diff
changeset
|
916 while ( surface->locked > 0 ) { |
|
01cddd0f2efb
You can't free locked surfaces!
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|
917 SDL_UnlockSurface(surface); |
|
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|
918 } |
| 0 | 919 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { |
| 920 SDL_UnRLESurface(surface, 0); | |
| 921 } | |
| 922 if ( surface->format ) { | |
| 923 SDL_FreeFormat(surface->format); | |
| 924 surface->format = NULL; | |
| 925 } | |
| 926 if ( surface->map != NULL ) { | |
| 927 SDL_FreeBlitMap(surface->map); | |
| 928 surface->map = NULL; | |
| 929 } | |
|
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Memory leak fix for DirectX software surfaces
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|
930 if ( surface->hwdata ) { |
| 0 | 931 SDL_VideoDevice *video = current_video; |
| 932 SDL_VideoDevice *this = current_video; | |
| 933 video->FreeHWSurface(this, surface); | |
| 934 } | |
| 935 if ( surface->pixels && | |
| 936 ((surface->flags & SDL_PREALLOC) != SDL_PREALLOC) ) { | |
|
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937 SDL_free(surface->pixels); |
| 0 | 938 } |
|
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939 SDL_free(surface); |
| 0 | 940 #ifdef CHECK_LEAKS |
| 941 --surfaces_allocated; | |
| 942 #endif | |
| 943 } |