Mercurial > sdl-ios-xcode
annotate src/video/SDL_surface.c @ 519:c7da0cd5ae5e
*** empty log message ***
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 07 Oct 2002 15:36:32 +0000 |
| parents | 1be0cdaf8092 |
| children | 4314a501d7be |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
297
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Updated copyright information for 2002
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|
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 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 | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #include <stdio.h> | |
| 29 #include <stdlib.h> | |
| 30 #include <string.h> | |
| 31 | |
| 32 #include "SDL_error.h" | |
| 33 #include "SDL_video.h" | |
| 34 #include "SDL_sysvideo.h" | |
| 35 #include "SDL_cursor_c.h" | |
| 36 #include "SDL_blit.h" | |
| 37 #include "SDL_RLEaccel_c.h" | |
| 38 #include "SDL_pixels_c.h" | |
| 39 #include "SDL_memops.h" | |
| 40 #include "SDL_leaks.h" | |
| 41 | |
| 42 /* Public routines */ | |
| 43 /* | |
| 44 * Create an empty RGB surface of the appropriate depth | |
| 45 */ | |
| 46 SDL_Surface * SDL_CreateRGBSurface (Uint32 flags, | |
| 47 int width, int height, int depth, | |
| 48 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) | |
| 49 { | |
| 50 SDL_VideoDevice *video = current_video; | |
| 51 SDL_VideoDevice *this = current_video; | |
| 52 SDL_Surface *screen; | |
| 53 SDL_Surface *surface; | |
| 54 | |
| 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 */ | |
| 80 surface = (SDL_Surface *)malloc(sizeof(*surface)); | |
| 81 if ( surface == NULL ) { | |
| 82 SDL_OutOfMemory(); | |
| 83 return(NULL); | |
| 84 } | |
| 85 surface->flags = SDL_SWSURFACE; | |
| 86 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 87 depth = screen->format->BitsPerPixel; | |
| 88 Rmask = screen->format->Rmask; | |
| 89 Gmask = screen->format->Gmask; | |
| 90 Bmask = screen->format->Bmask; | |
| 91 Amask = screen->format->Amask; | |
| 92 } | |
| 93 surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask); | |
| 94 if ( surface->format == NULL ) { | |
| 95 free(surface); | |
| 96 return(NULL); | |
| 97 } | |
| 98 if ( Amask ) { | |
| 99 surface->flags |= SDL_SRCALPHA; | |
| 100 } | |
| 101 surface->w = width; | |
| 102 surface->h = height; | |
| 103 surface->pitch = SDL_CalculatePitch(surface); | |
| 104 surface->pixels = NULL; | |
| 105 surface->offset = 0; | |
| 106 surface->hwdata = NULL; | |
| 107 surface->locked = 0; | |
| 108 surface->map = NULL; | |
| 109 surface->format_version = 0; | |
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110 surface->unused1 = 0; |
| 0 | 111 SDL_SetClipRect(surface, NULL); |
| 112 | |
| 113 /* Get the pixels */ | |
| 114 if ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) || | |
| 115 (video->AllocHWSurface(this, surface) < 0) ) { | |
| 116 if ( surface->w && surface->h ) { | |
| 117 surface->pixels = malloc(surface->h*surface->pitch); | |
| 118 if ( surface->pixels == NULL ) { | |
| 119 SDL_FreeSurface(surface); | |
| 120 SDL_OutOfMemory(); | |
| 121 return(NULL); | |
| 122 } | |
| 123 /* This is important for bitmaps */ | |
| 124 memset(surface->pixels, 0, surface->h*surface->pitch); | |
| 125 } | |
| 126 } | |
| 127 | |
| 128 /* Allocate an empty mapping */ | |
| 129 surface->map = SDL_AllocBlitMap(); | |
| 130 if ( surface->map == NULL ) { | |
| 131 SDL_FreeSurface(surface); | |
| 132 return(NULL); | |
| 133 } | |
| 134 | |
| 135 /* The surface is ready to go */ | |
| 136 surface->refcount = 1; | |
| 137 #ifdef CHECK_LEAKS | |
| 138 ++surfaces_allocated; | |
| 139 #endif | |
| 140 return(surface); | |
| 141 } | |
| 142 /* | |
| 143 * Create an RGB surface from an existing memory buffer | |
| 144 */ | |
| 145 SDL_Surface * SDL_CreateRGBSurfaceFrom (void *pixels, | |
| 146 int width, int height, int depth, int pitch, | |
| 147 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) | |
| 148 { | |
| 149 SDL_Surface *surface; | |
| 150 | |
| 151 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, 0, 0, depth, | |
| 152 Rmask, Gmask, Bmask, Amask); | |
| 153 if ( surface != NULL ) { | |
| 154 surface->flags |= SDL_PREALLOC; | |
| 155 surface->pixels = pixels; | |
| 156 surface->w = width; | |
| 157 surface->h = height; | |
| 158 surface->pitch = pitch; | |
| 159 SDL_SetClipRect(surface, NULL); | |
| 160 } | |
| 161 return(surface); | |
| 162 } | |
| 163 /* | |
| 164 * Set the color key in a blittable surface | |
| 165 */ | |
| 166 int SDL_SetColorKey (SDL_Surface *surface, Uint32 flag, Uint32 key) | |
| 167 { | |
| 168 /* Sanity check the flag as it gets passed in */ | |
| 169 if ( flag & SDL_SRCCOLORKEY ) { | |
| 170 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
| 171 flag = (SDL_SRCCOLORKEY | SDL_RLEACCELOK); | |
| 172 } else { | |
| 173 flag = SDL_SRCCOLORKEY; | |
| 174 } | |
| 175 } else { | |
| 176 flag = 0; | |
| 177 } | |
| 178 | |
| 179 /* Optimize away operations that don't change anything */ | |
| 180 if ( (flag == (surface->flags & (SDL_SRCCOLORKEY|SDL_RLEACCELOK))) && | |
| 181 (key == surface->format->colorkey) ) { | |
| 182 return(0); | |
| 183 } | |
| 184 | |
| 185 /* UnRLE surfaces before we change the colorkey */ | |
| 186 if ( surface->flags & SDL_RLEACCEL ) { | |
| 187 SDL_UnRLESurface(surface, 1); | |
| 188 } | |
| 189 | |
| 190 if ( flag ) { | |
| 191 SDL_VideoDevice *video = current_video; | |
| 192 SDL_VideoDevice *this = current_video; | |
| 193 | |
| 194 | |
| 195 surface->flags |= SDL_SRCCOLORKEY; | |
| 196 surface->format->colorkey = key; | |
| 197 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 198 if ( (video->SetHWColorKey == NULL) || | |
| 199 (video->SetHWColorKey(this, surface, key) < 0) ) { | |
| 200 surface->flags &= ~SDL_HWACCEL; | |
| 201 } | |
| 202 } | |
| 203 if ( flag & SDL_RLEACCELOK ) { | |
| 204 surface->flags |= SDL_RLEACCELOK; | |
| 205 } else { | |
| 206 surface->flags &= ~SDL_RLEACCELOK; | |
| 207 } | |
| 208 } else { | |
| 209 surface->flags &= ~(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
| 210 surface->format->colorkey = 0; | |
| 211 } | |
| 212 SDL_InvalidateMap(surface->map); | |
| 213 return(0); | |
| 214 } | |
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215 /* This function sets the alpha channel of a surface */ |
| 0 | 216 int SDL_SetAlpha (SDL_Surface *surface, Uint32 flag, Uint8 value) |
| 217 { | |
| 218 Uint32 oldflags = surface->flags; | |
| 219 Uint32 oldalpha = surface->format->alpha; | |
| 220 | |
| 221 /* Sanity check the flag as it gets passed in */ | |
| 222 if ( flag & SDL_SRCALPHA ) { | |
| 223 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
| 224 flag = (SDL_SRCALPHA | SDL_RLEACCELOK); | |
| 225 } else { | |
| 226 flag = SDL_SRCALPHA; | |
| 227 } | |
| 228 } else { | |
| 229 flag = 0; | |
| 230 } | |
| 231 | |
| 232 /* Optimize away operations that don't change anything */ | |
| 233 if ( (flag == (surface->flags & (SDL_SRCALPHA|SDL_RLEACCELOK))) && | |
| 234 (!flag || value == oldalpha) ) { | |
| 235 return(0); | |
| 236 } | |
| 237 | |
| 238 if(!(flag & SDL_RLEACCELOK) && (surface->flags & SDL_RLEACCEL)) | |
| 239 SDL_UnRLESurface(surface, 1); | |
| 240 | |
| 241 if ( flag ) { | |
| 242 SDL_VideoDevice *video = current_video; | |
| 243 SDL_VideoDevice *this = current_video; | |
| 244 | |
| 245 surface->flags |= SDL_SRCALPHA; | |
| 246 surface->format->alpha = value; | |
| 247 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 248 if ( (video->SetHWAlpha == NULL) || | |
| 249 (video->SetHWAlpha(this, surface, value) < 0) ) { | |
| 250 surface->flags &= ~SDL_HWACCEL; | |
| 251 } | |
| 252 } | |
| 253 if ( flag & SDL_RLEACCELOK ) { | |
| 254 surface->flags |= SDL_RLEACCELOK; | |
| 255 } else { | |
| 256 surface->flags &= ~SDL_RLEACCELOK; | |
| 257 } | |
| 258 } else { | |
| 259 surface->flags &= ~SDL_SRCALPHA; | |
| 260 surface->format->alpha = SDL_ALPHA_OPAQUE; | |
| 261 } | |
| 262 /* | |
| 263 * The representation for software surfaces is independent of | |
| 264 * per-surface alpha, so no need to invalidate the blit mapping | |
| 265 * if just the alpha value was changed. (If either is 255, we still | |
| 266 * need to invalidate.) | |
| 267 */ | |
| 268 if((surface->flags & SDL_HWACCEL) == SDL_HWACCEL | |
| 269 || oldflags != surface->flags | |
| 270 || (((oldalpha + 1) ^ (value + 1)) & 0x100)) | |
| 271 SDL_InvalidateMap(surface->map); | |
| 272 return(0); | |
| 273 } | |
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274 int SDL_SetAlphaChannel(SDL_Surface *surface, Uint8 value) |
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275 { |
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276 int row, col; |
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277 int offset; |
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278 Uint8 *buf; |
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279 |
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280 if ( (surface->format->Amask != 0xFF000000) && |
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281 (surface->format->Amask != 0x000000FF) ) { |
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282 SDL_SetError("Unsupported surface alpha mask format"); |
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283 return -1; |
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284 } |
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285 |
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286 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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287 if ( surface->format->Amask == 0xFF000000 ) { |
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288 offset = 3; |
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289 } else { |
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290 offset = 0; |
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291 } |
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292 #else |
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293 if ( surface->format->Amask == 0xFF000000 ) { |
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294 offset = 0; |
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295 } else { |
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296 offset = 3; |
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297 } |
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298 #endif /* Byte ordering */ |
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299 |
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300 /* Quickly set the alpha channel of an RGBA or ARGB surface */ |
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301 if ( SDL_MUSTLOCK(surface) ) { |
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302 if ( SDL_LockSurface(surface) < 0 ) { |
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303 return -1; |
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304 } |
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305 } |
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306 row = surface->h; |
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307 while (row--) { |
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308 col = surface->w; |
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309 buf = (Uint8 *)surface->pixels + row * surface->pitch + offset; |
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310 while(col--) { |
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311 *buf = value; |
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312 buf += 4; |
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313 } |
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314 } |
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315 if ( SDL_MUSTLOCK(surface) ) { |
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316 SDL_UnlockSurface(surface); |
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317 } |
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318 return 0; |
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319 } |
| 0 | 320 |
| 321 /* | |
| 322 * A function to calculate the intersection of two rectangles: | |
| 323 * return true if the rectangles intersect, false otherwise | |
| 324 */ | |
| 325 static __inline__ | |
|
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326 SDL_bool SDL_IntersectRect(const SDL_Rect *A, const SDL_Rect *B, SDL_Rect *intersection) |
| 0 | 327 { |
| 328 int Amin, Amax, Bmin, Bmax; | |
| 329 | |
| 330 /* Horizontal intersection */ | |
| 331 Amin = A->x; | |
| 332 Amax = Amin + A->w; | |
| 333 Bmin = B->x; | |
| 334 Bmax = Bmin + B->w; | |
| 335 if(Bmin > Amin) | |
| 336 Amin = Bmin; | |
| 337 intersection->x = Amin; | |
| 338 if(Bmax < Amax) | |
| 339 Amax = Bmax; | |
| 340 intersection->w = Amax - Amin > 0 ? Amax - Amin : 0; | |
| 341 | |
| 342 /* Vertical intersection */ | |
| 343 Amin = A->y; | |
| 344 Amax = Amin + A->h; | |
| 345 Bmin = B->y; | |
| 346 Bmax = Bmin + B->h; | |
| 347 if(Bmin > Amin) | |
| 348 Amin = Bmin; | |
| 349 intersection->y = Amin; | |
| 350 if(Bmax < Amax) | |
| 351 Amax = Bmax; | |
| 352 intersection->h = Amax - Amin > 0 ? Amax - Amin : 0; | |
| 353 | |
| 354 return (intersection->w && intersection->h); | |
| 355 } | |
| 356 /* | |
| 357 * Set the clipping rectangle for a blittable surface | |
| 358 */ | |
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359 SDL_bool SDL_SetClipRect(SDL_Surface *surface, const SDL_Rect *rect) |
| 0 | 360 { |
| 361 SDL_Rect full_rect; | |
| 362 | |
| 363 /* Don't do anything if there's no surface to act on */ | |
| 364 if ( ! surface ) { | |
| 365 return SDL_FALSE; | |
| 366 } | |
| 367 | |
| 368 /* Set up the full surface rectangle */ | |
| 369 full_rect.x = 0; | |
| 370 full_rect.y = 0; | |
| 371 full_rect.w = surface->w; | |
| 372 full_rect.h = surface->h; | |
| 373 | |
| 374 /* Set the clipping rectangle */ | |
| 375 if ( ! rect ) { | |
| 376 surface->clip_rect = full_rect; | |
| 377 return 1; | |
| 378 } | |
| 379 return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect); | |
| 380 } | |
| 381 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect) | |
| 382 { | |
| 383 if ( surface && rect ) { | |
| 384 *rect = surface->clip_rect; | |
| 385 } | |
| 386 } | |
| 387 /* | |
| 388 * Set up a blit between two surfaces -- split into three parts: | |
| 389 * The upper part, SDL_UpperBlit(), performs clipping and rectangle | |
| 390 * verification. The lower part is a pointer to a low level | |
| 391 * accelerated blitting function. | |
| 392 * | |
| 393 * These parts are separated out and each used internally by this | |
| 394 * library in the optimimum places. They are exported so that if | |
| 395 * you know exactly what you are doing, you can optimize your code | |
| 396 * by calling the one(s) you need. | |
| 397 */ | |
| 398 int SDL_LowerBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
| 399 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 400 { | |
| 401 SDL_blit do_blit; | |
|
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402 SDL_Rect hw_srcrect; |
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403 SDL_Rect hw_dstrect; |
| 0 | 404 |
| 405 /* Check to make sure the blit mapping is valid */ | |
| 406 if ( (src->map->dst != dst) || | |
| 407 (src->map->dst->format_version != src->map->format_version) ) { | |
| 408 if ( SDL_MapSurface(src, dst) < 0 ) { | |
| 409 return(-1); | |
| 410 } | |
| 411 } | |
| 412 | |
| 413 /* Figure out which blitter to use */ | |
| 414 if ( (src->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
|
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415 if ( src == SDL_VideoSurface ) { |
|
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416 hw_srcrect = *srcrect; |
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417 hw_srcrect.x += current_video->offset_x; |
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418 hw_srcrect.y += current_video->offset_y; |
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419 srcrect = &hw_srcrect; |
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420 } |
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421 if ( dst == SDL_VideoSurface ) { |
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422 hw_dstrect = *dstrect; |
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423 hw_dstrect.x += current_video->offset_x; |
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424 hw_dstrect.y += current_video->offset_y; |
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425 dstrect = &hw_dstrect; |
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426 } |
| 0 | 427 do_blit = src->map->hw_blit; |
| 428 } else { | |
| 429 do_blit = src->map->sw_blit; | |
| 430 } | |
| 431 return(do_blit(src, srcrect, dst, dstrect)); | |
| 432 } | |
| 433 | |
| 434 | |
| 435 int SDL_UpperBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
| 436 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 437 { | |
| 438 SDL_Rect fulldst; | |
| 439 int srcx, srcy, w, h; | |
| 440 | |
| 441 /* Make sure the surfaces aren't locked */ | |
| 442 if ( ! src || ! dst ) { | |
| 443 SDL_SetError("SDL_UpperBlit: passed a NULL surface"); | |
| 444 return(-1); | |
| 445 } | |
| 446 if ( src->locked || dst->locked ) { | |
| 447 SDL_SetError("Surfaces must not be locked during blit"); | |
| 448 return(-1); | |
| 449 } | |
| 450 | |
| 451 /* If the destination rectangle is NULL, use the entire dest surface */ | |
| 452 if ( dstrect == NULL ) { | |
| 453 fulldst.x = fulldst.y = 0; | |
| 454 dstrect = &fulldst; | |
| 455 } | |
| 456 | |
| 457 /* clip the source rectangle to the source surface */ | |
| 458 if(srcrect) { | |
| 459 int maxw, maxh; | |
| 460 | |
| 461 srcx = srcrect->x; | |
| 462 w = srcrect->w; | |
| 463 if(srcx < 0) { | |
| 464 w += srcx; | |
| 465 dstrect->x -= srcx; | |
| 466 srcx = 0; | |
| 467 } | |
| 468 maxw = src->w - srcx; | |
| 469 if(maxw < w) | |
| 470 w = maxw; | |
| 471 | |
| 472 srcy = srcrect->y; | |
| 473 h = srcrect->h; | |
| 474 if(srcy < 0) { | |
| 475 h += srcy; | |
| 476 dstrect->y -= srcy; | |
| 477 srcy = 0; | |
| 478 } | |
| 479 maxh = src->h - srcy; | |
| 480 if(maxh < h) | |
| 481 h = maxh; | |
| 482 | |
| 483 } else { | |
| 484 srcx = srcy = 0; | |
| 485 w = src->w; | |
| 486 h = src->h; | |
| 487 } | |
| 488 | |
| 489 /* clip the destination rectangle against the clip rectangle */ | |
| 490 { | |
| 491 SDL_Rect *clip = &dst->clip_rect; | |
| 492 int dx, dy; | |
| 493 | |
| 494 dx = clip->x - dstrect->x; | |
| 495 if(dx > 0) { | |
| 496 w -= dx; | |
| 497 dstrect->x += dx; | |
| 498 srcx += dx; | |
| 499 } | |
| 500 dx = dstrect->x + w - clip->x - clip->w; | |
| 501 if(dx > 0) | |
| 502 w -= dx; | |
| 503 | |
| 504 dy = clip->y - dstrect->y; | |
| 505 if(dy > 0) { | |
| 506 h -= dy; | |
| 507 dstrect->y += dy; | |
| 508 srcy += dy; | |
| 509 } | |
| 510 dy = dstrect->y + h - clip->y - clip->h; | |
| 511 if(dy > 0) | |
| 512 h -= dy; | |
| 513 } | |
| 514 | |
| 515 if(w > 0 && h > 0) { | |
| 516 SDL_Rect sr; | |
| 517 sr.x = srcx; | |
| 518 sr.y = srcy; | |
| 519 sr.w = dstrect->w = w; | |
| 520 sr.h = dstrect->h = h; | |
| 521 return SDL_LowerBlit(src, &sr, dst, dstrect); | |
| 522 } | |
| 523 dstrect->w = dstrect->h = 0; | |
| 524 return 0; | |
| 525 } | |
| 526 | |
| 527 /* | |
| 528 * This function performs a fast fill of the given rectangle with 'color' | |
| 529 */ | |
| 530 int SDL_FillRect(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) | |
| 531 { | |
| 532 SDL_VideoDevice *video = current_video; | |
| 533 SDL_VideoDevice *this = current_video; | |
| 534 int x, y; | |
| 535 Uint8 *row; | |
| 536 | |
| 537 /* If 'dstrect' == NULL, then fill the whole surface */ | |
| 538 if ( dstrect ) { | |
| 539 /* Perform clipping */ | |
| 540 if ( !SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect) ) { | |
| 541 return(0); | |
| 542 } | |
| 543 } else { | |
| 544 dstrect = &dst->clip_rect; | |
| 545 } | |
| 546 | |
| 547 /* Check for hardware acceleration */ | |
| 548 if ( ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) && | |
| 549 video->info.blit_fill ) { | |
|
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550 SDL_Rect hw_rect; |
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551 if ( dst == SDL_VideoSurface ) { |
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552 hw_rect = *dstrect; |
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553 hw_rect.x += current_video->offset_x; |
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554 hw_rect.y += current_video->offset_y; |
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555 dstrect = &hw_rect; |
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556 } |
| 0 | 557 return(video->FillHWRect(this, dst, dstrect, color)); |
| 558 } | |
| 559 | |
| 560 /* Perform software fill */ | |
| 561 if ( SDL_LockSurface(dst) != 0 ) { | |
| 562 return(-1); | |
| 563 } | |
| 564 row = (Uint8 *)dst->pixels+dstrect->y*dst->pitch+ | |
| 565 dstrect->x*dst->format->BytesPerPixel; | |
| 566 if ( dst->format->palette || (color == 0) ) { | |
| 567 x = dstrect->w*dst->format->BytesPerPixel; | |
| 568 if ( !color && !((long)row&3) && !(x&3) && !(dst->pitch&3) ) { | |
| 569 int n = x >> 2; | |
| 570 for ( y=dstrect->h; y; --y ) { | |
| 571 SDL_memset4(row, 0, n); | |
| 572 row += dst->pitch; | |
| 573 } | |
| 574 } else { | |
| 575 #ifdef __powerpc__ | |
| 576 /* | |
| 577 * memset() on PPC (both glibc and codewarrior) uses | |
| 578 * the dcbz (Data Cache Block Zero) instruction, which | |
| 579 * causes an alignment exception if the destination is | |
| 580 * uncachable, so only use it on software surfaces | |
| 581 */ | |
| 582 if((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) { | |
| 583 if(dstrect->w >= 8) { | |
| 584 /* | |
| 585 * 64-bit stores are probably most | |
| 586 * efficient to uncached video memory | |
| 587 */ | |
| 588 double fill; | |
| 589 memset(&fill, color, (sizeof fill)); | |
| 590 for(y = dstrect->h; y; y--) { | |
| 591 Uint8 *d = row; | |
| 592 unsigned n = x; | |
| 593 unsigned nn; | |
| 594 Uint8 c = color; | |
| 595 double f = fill; | |
| 596 while((unsigned long)d | |
| 597 & (sizeof(double) - 1)) { | |
| 598 *d++ = c; | |
| 599 n--; | |
| 600 } | |
| 601 nn = n / (sizeof(double) * 4); | |
| 602 while(nn) { | |
| 603 ((double *)d)[0] = f; | |
| 604 ((double *)d)[1] = f; | |
| 605 ((double *)d)[2] = f; | |
| 606 ((double *)d)[3] = f; | |
| 607 d += 4*sizeof(double); | |
| 608 nn--; | |
| 609 } | |
| 610 n &= ~(sizeof(double) * 4 - 1); | |
| 611 nn = n / sizeof(double); | |
| 612 while(nn) { | |
| 613 *(double *)d = f; | |
| 614 d += sizeof(double); | |
| 615 nn--; | |
| 616 } | |
| 617 n &= ~(sizeof(double) - 1); | |
| 618 while(n) { | |
| 619 *d++ = c; | |
| 620 n--; | |
| 621 } | |
| 622 row += dst->pitch; | |
| 623 } | |
| 624 } else { | |
| 625 /* narrow boxes */ | |
| 626 for(y = dstrect->h; y; y--) { | |
| 627 Uint8 *d = row; | |
| 628 Uint8 c = color; | |
| 629 int n = x; | |
| 630 while(n) { | |
| 631 *d++ = c; | |
| 632 n--; | |
| 633 } | |
| 634 row += dst->pitch; | |
| 635 } | |
| 636 } | |
| 637 } else | |
| 638 #endif /* __powerpc__ */ | |
| 639 { | |
| 640 for(y = dstrect->h; y; y--) { | |
| 641 memset(row, color, x); | |
| 642 row += dst->pitch; | |
| 643 } | |
| 644 } | |
| 645 } | |
| 646 } else { | |
| 647 switch (dst->format->BytesPerPixel) { | |
| 648 case 2: | |
| 649 for ( y=dstrect->h; y; --y ) { | |
| 650 Uint16 *pixels = (Uint16 *)row; | |
| 651 Uint16 c = color; | |
| 652 Uint32 cc = (Uint32)c << 16 | c; | |
| 653 int n = dstrect->w; | |
| 654 if((unsigned long)pixels & 3) { | |
| 655 *pixels++ = c; | |
| 656 n--; | |
| 657 } | |
| 658 if(n >> 1) | |
| 659 SDL_memset4(pixels, cc, n >> 1); | |
| 660 if(n & 1) | |
| 661 pixels[n - 1] = c; | |
| 662 row += dst->pitch; | |
| 663 } | |
| 664 break; | |
| 665 | |
| 666 case 3: | |
| 667 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) | |
| 668 color <<= 8; | |
| 669 for ( y=dstrect->h; y; --y ) { | |
| 670 Uint8 *pixels = row; | |
| 671 for ( x=dstrect->w; x; --x ) { | |
| 672 memcpy(pixels, &color, 3); | |
| 673 pixels += 3; | |
| 674 } | |
| 675 row += dst->pitch; | |
| 676 } | |
| 677 break; | |
| 678 | |
| 679 case 4: | |
| 680 for(y = dstrect->h; y; --y) { | |
| 681 SDL_memset4(row, color, dstrect->w); | |
| 682 row += dst->pitch; | |
| 683 } | |
| 684 break; | |
| 685 } | |
| 686 } | |
| 687 SDL_UnlockSurface(dst); | |
| 688 | |
| 689 /* We're done! */ | |
| 690 return(0); | |
| 691 } | |
| 692 | |
| 693 /* | |
| 694 * Lock a surface to directly access the pixels | |
| 695 * -- Do not call this from any blit function, as SDL_DrawCursor() may recurse | |
| 696 * Instead, use: | |
| 697 * if ( (surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) | |
| 698 * video->LockHWSurface(video, surface); | |
| 699 */ | |
| 700 int SDL_LockSurface (SDL_Surface *surface) | |
| 701 { | |
| 702 if ( ! surface->locked ) { | |
| 703 /* Perform the lock */ | |
| 704 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
| 705 SDL_VideoDevice *video = current_video; | |
| 706 SDL_VideoDevice *this = current_video; | |
| 707 if ( video->LockHWSurface(this, surface) < 0 ) { | |
| 708 return(-1); | |
| 709 } | |
| 710 } | |
| 711 if ( surface->flags & SDL_RLEACCEL ) { | |
| 712 SDL_UnRLESurface(surface, 1); | |
| 713 surface->flags |= SDL_RLEACCEL; /* save accel'd state */ | |
| 714 } | |
| 715 /* This needs to be done here in case pixels changes value */ | |
| 716 surface->pixels = (Uint8 *)surface->pixels + surface->offset; | |
| 717 } | |
| 718 | |
| 719 /* Increment the surface lock count, for recursive locks */ | |
| 720 ++surface->locked; | |
| 721 | |
| 722 /* Ready to go.. */ | |
| 723 return(0); | |
| 724 } | |
| 725 /* | |
| 726 * Unlock a previously locked surface | |
| 727 * -- Do not call this from any blit function, as SDL_DrawCursor() may recurse | |
| 728 * Instead, use: | |
| 729 * if ( (surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) | |
| 730 * video->UnlockHWSurface(video, surface); | |
| 731 */ | |
| 732 void SDL_UnlockSurface (SDL_Surface *surface) | |
| 733 { | |
| 734 /* Only perform an unlock if we are locked */ | |
| 735 if ( ! surface->locked || (--surface->locked > 0) ) { | |
| 736 return; | |
| 737 } | |
| 738 | |
| 739 /* Perform the unlock */ | |
| 740 surface->pixels = (Uint8 *)surface->pixels - surface->offset; | |
| 741 | |
| 742 /* Unlock hardware or accelerated surfaces */ | |
| 743 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
| 744 SDL_VideoDevice *video = current_video; | |
| 745 SDL_VideoDevice *this = current_video; | |
| 746 video->UnlockHWSurface(this, surface); | |
| 747 } else { | |
| 748 /* Update RLE encoded surface with new data */ | |
| 749 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 750 surface->flags &= ~SDL_RLEACCEL; /* stop lying */ | |
| 751 SDL_RLESurface(surface); | |
| 752 } | |
| 753 } | |
| 754 } | |
| 755 | |
| 756 /* | |
| 757 * Convert a surface into the specified pixel format. | |
| 758 */ | |
| 759 SDL_Surface * SDL_ConvertSurface (SDL_Surface *surface, | |
| 760 SDL_PixelFormat *format, Uint32 flags) | |
| 761 { | |
| 762 SDL_Surface *convert; | |
| 763 Uint32 colorkey = 0; | |
| 764 Uint8 alpha = 0; | |
| 765 Uint32 surface_flags; | |
| 766 SDL_Rect bounds; | |
| 767 | |
| 768 /* Check for empty destination palette! (results in empty image) */ | |
| 769 if ( format->palette != NULL ) { | |
| 770 int i; | |
| 771 for ( i=0; i<format->palette->ncolors; ++i ) { | |
| 772 if ( (format->palette->colors[i].r != 0) || | |
| 773 (format->palette->colors[i].g != 0) || | |
| 774 (format->palette->colors[i].b != 0) ) | |
| 775 break; | |
| 776 } | |
| 777 if ( i == format->palette->ncolors ) { | |
| 778 SDL_SetError("Empty destination palette"); | |
| 779 return(NULL); | |
| 780 } | |
| 781 } | |
| 782 | |
|
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783 /* Only create hw surfaces with alpha channel if hw alpha blits |
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784 are supported */ |
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785 if(format->Amask != 0 && (flags & SDL_HWSURFACE)) { |
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786 const SDL_VideoInfo *vi = SDL_GetVideoInfo(); |
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787 if(!vi || !vi->blit_hw_A) |
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788 flags &= ~SDL_HWSURFACE; |
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789 } |
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790 |
| 0 | 791 /* Create a new surface with the desired format */ |
| 792 convert = SDL_CreateRGBSurface(flags, | |
| 793 surface->w, surface->h, format->BitsPerPixel, | |
| 794 format->Rmask, format->Gmask, format->Bmask, format->Amask); | |
| 795 if ( convert == NULL ) { | |
| 796 return(NULL); | |
| 797 } | |
| 798 | |
| 799 /* Copy the palette if any */ | |
| 800 if ( format->palette && convert->format->palette ) { | |
| 801 memcpy(convert->format->palette->colors, | |
| 802 format->palette->colors, | |
| 803 format->palette->ncolors*sizeof(SDL_Color)); | |
| 804 convert->format->palette->ncolors = format->palette->ncolors; | |
| 805 } | |
| 806 | |
| 807 /* Save the original surface color key and alpha */ | |
| 808 surface_flags = surface->flags; | |
| 809 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 810 /* Convert colourkeyed surfaces to RGBA if requested */ | |
| 811 if((flags & SDL_SRCCOLORKEY) != SDL_SRCCOLORKEY | |
| 812 && format->Amask) { | |
| 813 surface_flags &= ~SDL_SRCCOLORKEY; | |
| 814 } else { | |
| 815 colorkey = surface->format->colorkey; | |
| 816 SDL_SetColorKey(surface, 0, 0); | |
| 817 } | |
| 818 } | |
| 819 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
|
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820 /* Copy over the alpha channel to RGBA if requested */ |
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821 if ( format->Amask ) { |
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822 surface->flags &= ~SDL_SRCALPHA; |
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823 } else { |
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824 alpha = surface->format->alpha; |
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41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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825 SDL_SetAlpha(surface, 0, 0); |
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41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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826 } |
| 0 | 827 } |
| 828 | |
| 829 /* Copy over the image data */ | |
| 830 bounds.x = 0; | |
| 831 bounds.y = 0; | |
| 832 bounds.w = surface->w; | |
| 833 bounds.h = surface->h; | |
| 834 SDL_LowerBlit(surface, &bounds, convert, &bounds); | |
| 835 | |
| 836 /* Clean up the original surface, and update converted surface */ | |
| 837 if ( convert != NULL ) { | |
| 838 SDL_SetClipRect(convert, &surface->clip_rect); | |
| 839 } | |
| 840 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 841 Uint32 cflags = surface_flags&(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
| 842 if ( convert != NULL ) { | |
| 843 Uint8 keyR, keyG, keyB; | |
| 844 | |
| 845 SDL_GetRGB(colorkey,surface->format,&keyR,&keyG,&keyB); | |
| 846 SDL_SetColorKey(convert, cflags|(flags&SDL_RLEACCELOK), | |
| 847 SDL_MapRGB(convert->format, keyR, keyG, keyB)); | |
| 848 } | |
| 849 SDL_SetColorKey(surface, cflags, colorkey); | |
| 850 } | |
| 851 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
| 852 Uint32 aflags = surface_flags&(SDL_SRCALPHA|SDL_RLEACCELOK); | |
| 853 if ( convert != NULL ) { | |
| 854 SDL_SetAlpha(convert, aflags|(flags&SDL_RLEACCELOK), | |
| 855 alpha); | |
| 856 } | |
|
431
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Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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857 if ( format->Amask ) { |
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41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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858 surface->flags |= SDL_SRCALPHA; |
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41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
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859 } else { |
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41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
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860 SDL_SetAlpha(surface, aflags, alpha); |
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41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
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861 } |
| 0 | 862 } |
| 863 | |
| 864 /* We're ready to go! */ | |
| 865 return(convert); | |
| 866 } | |
| 867 | |
| 868 /* | |
| 869 * Free a surface created by the above function. | |
| 870 */ | |
| 871 void SDL_FreeSurface (SDL_Surface *surface) | |
| 872 { | |
| 873 /* Free anything that's not NULL, and not the screen surface */ | |
| 874 if ((surface == NULL) || | |
| 875 (current_video && | |
| 876 ((surface == SDL_ShadowSurface)||(surface == SDL_VideoSurface)))) { | |
| 877 return; | |
| 878 } | |
| 879 if ( --surface->refcount > 0 ) { | |
| 880 return; | |
| 881 } | |
| 882 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 883 SDL_UnRLESurface(surface, 0); | |
| 884 } | |
| 885 if ( surface->format ) { | |
| 886 SDL_FreeFormat(surface->format); | |
| 887 surface->format = NULL; | |
| 888 } | |
| 889 if ( surface->map != NULL ) { | |
| 890 SDL_FreeBlitMap(surface->map); | |
| 891 surface->map = NULL; | |
| 892 } | |
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Memory leak fix for DirectX software surfaces
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893 if ( surface->hwdata ) { |
| 0 | 894 SDL_VideoDevice *video = current_video; |
| 895 SDL_VideoDevice *this = current_video; | |
| 896 video->FreeHWSurface(this, surface); | |
| 897 } | |
| 898 if ( surface->pixels && | |
| 899 ((surface->flags & SDL_PREALLOC) != SDL_PREALLOC) ) { | |
| 900 free(surface->pixels); | |
| 901 } | |
| 902 free(surface); | |
| 903 #ifdef CHECK_LEAKS | |
| 904 --surfaces_allocated; | |
| 905 #endif | |
| 906 } |