Mercurial > sdl-ios-xcode
annotate src/video/SDL_surface.c @ 1122:e253d5448fce
From Patrice Mandin:
"Just a request about test subdirectory: the autotools files
(config.guess, config.sub, etc...) are a bit outdated, and I have to
update them for my cross-compilation party. So it would be nice to
have these updated.
...
Just removing these files works, because then configure will use
those of SDL's topdir. Could someone else check this, just to be sure?
i.e. remove config.guess, config.sub, install-sh and mkinstalldirs from
test subdir."
I tested on Linux and MacOSX...seems to be safe, so I'm nuking the files.
--ryan.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sat, 20 Aug 2005 21:39:06 +0000 |
| parents | 68f607298ca9 |
| children | 91569ec25acd |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 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 | |
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55 /* Make sure the size requested doesn't overflow our datatypes */ |
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56 /* Next time I write a library like SDL, I'll use int for size. :) */ |
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57 if ( width >= 16384 || height >= 65536 ) { |
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58 SDL_SetError("Width or height is too large"); |
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59 return(NULL); |
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60 } |
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61 |
| 0 | 62 /* Check to see if we desire the surface in video memory */ |
| 63 if ( video ) { | |
| 64 screen = SDL_PublicSurface; | |
| 65 } else { | |
| 66 screen = NULL; | |
| 67 } | |
| 68 if ( screen && ((screen->flags&SDL_HWSURFACE) == SDL_HWSURFACE) ) { | |
| 69 if ( (flags&(SDL_SRCCOLORKEY|SDL_SRCALPHA)) != 0 ) { | |
| 70 flags |= SDL_HWSURFACE; | |
| 71 } | |
| 72 if ( (flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 73 if ( ! current_video->info.blit_hw_CC ) { | |
| 74 flags &= ~SDL_HWSURFACE; | |
| 75 } | |
| 76 } | |
| 77 if ( (flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
| 78 if ( ! current_video->info.blit_hw_A ) { | |
| 79 flags &= ~SDL_HWSURFACE; | |
| 80 } | |
| 81 } | |
| 82 } else { | |
| 83 flags &= ~SDL_HWSURFACE; | |
| 84 } | |
| 85 | |
| 86 /* Allocate the surface */ | |
| 87 surface = (SDL_Surface *)malloc(sizeof(*surface)); | |
| 88 if ( surface == NULL ) { | |
| 89 SDL_OutOfMemory(); | |
| 90 return(NULL); | |
| 91 } | |
| 92 surface->flags = SDL_SWSURFACE; | |
| 93 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
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94 if ((Amask) && (video->displayformatalphapixel)) |
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95 { |
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96 depth = video->displayformatalphapixel->BitsPerPixel; |
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97 Rmask = video->displayformatalphapixel->Rmask; |
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98 Gmask = video->displayformatalphapixel->Gmask; |
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99 Bmask = video->displayformatalphapixel->Bmask; |
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100 Amask = video->displayformatalphapixel->Amask; |
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101 } |
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102 else |
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103 { |
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104 depth = screen->format->BitsPerPixel; |
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105 Rmask = screen->format->Rmask; |
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106 Gmask = screen->format->Gmask; |
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107 Bmask = screen->format->Bmask; |
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108 Amask = screen->format->Amask; |
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109 } |
| 0 | 110 } |
| 111 surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask); | |
| 112 if ( surface->format == NULL ) { | |
| 113 free(surface); | |
| 114 return(NULL); | |
| 115 } | |
| 116 if ( Amask ) { | |
| 117 surface->flags |= SDL_SRCALPHA; | |
| 118 } | |
| 119 surface->w = width; | |
| 120 surface->h = height; | |
| 121 surface->pitch = SDL_CalculatePitch(surface); | |
| 122 surface->pixels = NULL; | |
| 123 surface->offset = 0; | |
| 124 surface->hwdata = NULL; | |
| 125 surface->locked = 0; | |
| 126 surface->map = NULL; | |
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127 surface->unused1 = 0; |
| 0 | 128 SDL_SetClipRect(surface, NULL); |
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129 SDL_FormatChanged(surface); |
| 0 | 130 |
| 131 /* Get the pixels */ | |
| 132 if ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) || | |
| 133 (video->AllocHWSurface(this, surface) < 0) ) { | |
| 134 if ( surface->w && surface->h ) { | |
| 135 surface->pixels = malloc(surface->h*surface->pitch); | |
| 136 if ( surface->pixels == NULL ) { | |
| 137 SDL_FreeSurface(surface); | |
| 138 SDL_OutOfMemory(); | |
| 139 return(NULL); | |
| 140 } | |
| 141 /* This is important for bitmaps */ | |
| 142 memset(surface->pixels, 0, surface->h*surface->pitch); | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 /* Allocate an empty mapping */ | |
| 147 surface->map = SDL_AllocBlitMap(); | |
| 148 if ( surface->map == NULL ) { | |
| 149 SDL_FreeSurface(surface); | |
| 150 return(NULL); | |
| 151 } | |
| 152 | |
| 153 /* The surface is ready to go */ | |
| 154 surface->refcount = 1; | |
| 155 #ifdef CHECK_LEAKS | |
| 156 ++surfaces_allocated; | |
| 157 #endif | |
| 158 return(surface); | |
| 159 } | |
| 160 /* | |
| 161 * Create an RGB surface from an existing memory buffer | |
| 162 */ | |
| 163 SDL_Surface * SDL_CreateRGBSurfaceFrom (void *pixels, | |
| 164 int width, int height, int depth, int pitch, | |
| 165 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) | |
| 166 { | |
| 167 SDL_Surface *surface; | |
| 168 | |
| 169 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, 0, 0, depth, | |
| 170 Rmask, Gmask, Bmask, Amask); | |
| 171 if ( surface != NULL ) { | |
| 172 surface->flags |= SDL_PREALLOC; | |
| 173 surface->pixels = pixels; | |
| 174 surface->w = width; | |
| 175 surface->h = height; | |
| 176 surface->pitch = pitch; | |
| 177 SDL_SetClipRect(surface, NULL); | |
| 178 } | |
| 179 return(surface); | |
| 180 } | |
| 181 /* | |
| 182 * Set the color key in a blittable surface | |
| 183 */ | |
| 184 int SDL_SetColorKey (SDL_Surface *surface, Uint32 flag, Uint32 key) | |
| 185 { | |
| 186 /* Sanity check the flag as it gets passed in */ | |
| 187 if ( flag & SDL_SRCCOLORKEY ) { | |
| 188 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
| 189 flag = (SDL_SRCCOLORKEY | SDL_RLEACCELOK); | |
| 190 } else { | |
| 191 flag = SDL_SRCCOLORKEY; | |
| 192 } | |
| 193 } else { | |
| 194 flag = 0; | |
| 195 } | |
| 196 | |
| 197 /* Optimize away operations that don't change anything */ | |
| 198 if ( (flag == (surface->flags & (SDL_SRCCOLORKEY|SDL_RLEACCELOK))) && | |
| 199 (key == surface->format->colorkey) ) { | |
| 200 return(0); | |
| 201 } | |
| 202 | |
| 203 /* UnRLE surfaces before we change the colorkey */ | |
| 204 if ( surface->flags & SDL_RLEACCEL ) { | |
| 205 SDL_UnRLESurface(surface, 1); | |
| 206 } | |
| 207 | |
| 208 if ( flag ) { | |
| 209 SDL_VideoDevice *video = current_video; | |
| 210 SDL_VideoDevice *this = current_video; | |
| 211 | |
| 212 | |
| 213 surface->flags |= SDL_SRCCOLORKEY; | |
| 214 surface->format->colorkey = key; | |
| 215 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 216 if ( (video->SetHWColorKey == NULL) || | |
| 217 (video->SetHWColorKey(this, surface, key) < 0) ) { | |
| 218 surface->flags &= ~SDL_HWACCEL; | |
| 219 } | |
| 220 } | |
| 221 if ( flag & SDL_RLEACCELOK ) { | |
| 222 surface->flags |= SDL_RLEACCELOK; | |
| 223 } else { | |
| 224 surface->flags &= ~SDL_RLEACCELOK; | |
| 225 } | |
| 226 } else { | |
| 227 surface->flags &= ~(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
| 228 surface->format->colorkey = 0; | |
| 229 } | |
| 230 SDL_InvalidateMap(surface->map); | |
| 231 return(0); | |
| 232 } | |
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233 /* This function sets the alpha channel of a surface */ |
| 0 | 234 int SDL_SetAlpha (SDL_Surface *surface, Uint32 flag, Uint8 value) |
| 235 { | |
| 236 Uint32 oldflags = surface->flags; | |
| 237 Uint32 oldalpha = surface->format->alpha; | |
| 238 | |
| 239 /* Sanity check the flag as it gets passed in */ | |
| 240 if ( flag & SDL_SRCALPHA ) { | |
| 241 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
| 242 flag = (SDL_SRCALPHA | SDL_RLEACCELOK); | |
| 243 } else { | |
| 244 flag = SDL_SRCALPHA; | |
| 245 } | |
| 246 } else { | |
| 247 flag = 0; | |
| 248 } | |
| 249 | |
| 250 /* Optimize away operations that don't change anything */ | |
| 251 if ( (flag == (surface->flags & (SDL_SRCALPHA|SDL_RLEACCELOK))) && | |
| 252 (!flag || value == oldalpha) ) { | |
| 253 return(0); | |
| 254 } | |
| 255 | |
| 256 if(!(flag & SDL_RLEACCELOK) && (surface->flags & SDL_RLEACCEL)) | |
| 257 SDL_UnRLESurface(surface, 1); | |
| 258 | |
| 259 if ( flag ) { | |
| 260 SDL_VideoDevice *video = current_video; | |
| 261 SDL_VideoDevice *this = current_video; | |
| 262 | |
| 263 surface->flags |= SDL_SRCALPHA; | |
| 264 surface->format->alpha = value; | |
| 265 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 266 if ( (video->SetHWAlpha == NULL) || | |
| 267 (video->SetHWAlpha(this, surface, value) < 0) ) { | |
| 268 surface->flags &= ~SDL_HWACCEL; | |
| 269 } | |
| 270 } | |
| 271 if ( flag & SDL_RLEACCELOK ) { | |
| 272 surface->flags |= SDL_RLEACCELOK; | |
| 273 } else { | |
| 274 surface->flags &= ~SDL_RLEACCELOK; | |
| 275 } | |
| 276 } else { | |
| 277 surface->flags &= ~SDL_SRCALPHA; | |
| 278 surface->format->alpha = SDL_ALPHA_OPAQUE; | |
| 279 } | |
| 280 /* | |
| 281 * The representation for software surfaces is independent of | |
| 282 * per-surface alpha, so no need to invalidate the blit mapping | |
| 283 * if just the alpha value was changed. (If either is 255, we still | |
| 284 * need to invalidate.) | |
| 285 */ | |
| 286 if((surface->flags & SDL_HWACCEL) == SDL_HWACCEL | |
| 287 || oldflags != surface->flags | |
| 288 || (((oldalpha + 1) ^ (value + 1)) & 0x100)) | |
| 289 SDL_InvalidateMap(surface->map); | |
| 290 return(0); | |
| 291 } | |
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292 int SDL_SetAlphaChannel(SDL_Surface *surface, Uint8 value) |
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293 { |
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294 int row, col; |
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295 int offset; |
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296 Uint8 *buf; |
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297 |
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298 if ( (surface->format->Amask != 0xFF000000) && |
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299 (surface->format->Amask != 0x000000FF) ) { |
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300 SDL_SetError("Unsupported surface alpha mask format"); |
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301 return -1; |
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302 } |
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303 |
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304 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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305 if ( surface->format->Amask == 0xFF000000 ) { |
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306 offset = 3; |
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307 } else { |
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308 offset = 0; |
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309 } |
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310 #else |
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311 if ( surface->format->Amask == 0xFF000000 ) { |
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312 offset = 0; |
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313 } else { |
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314 offset = 3; |
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315 } |
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316 #endif /* Byte ordering */ |
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317 |
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318 /* Quickly set the alpha channel of an RGBA or ARGB surface */ |
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319 if ( SDL_MUSTLOCK(surface) ) { |
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320 if ( SDL_LockSurface(surface) < 0 ) { |
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321 return -1; |
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322 } |
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323 } |
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324 row = surface->h; |
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325 while (row--) { |
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326 col = surface->w; |
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327 buf = (Uint8 *)surface->pixels + row * surface->pitch + offset; |
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328 while(col--) { |
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329 *buf = value; |
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330 buf += 4; |
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331 } |
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332 } |
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333 if ( SDL_MUSTLOCK(surface) ) { |
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334 SDL_UnlockSurface(surface); |
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335 } |
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336 return 0; |
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337 } |
| 0 | 338 |
| 339 /* | |
| 340 * A function to calculate the intersection of two rectangles: | |
| 341 * return true if the rectangles intersect, false otherwise | |
| 342 */ | |
| 343 static __inline__ | |
|
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344 SDL_bool SDL_IntersectRect(const SDL_Rect *A, const SDL_Rect *B, SDL_Rect *intersection) |
| 0 | 345 { |
| 346 int Amin, Amax, Bmin, Bmax; | |
| 347 | |
| 348 /* Horizontal intersection */ | |
| 349 Amin = A->x; | |
| 350 Amax = Amin + A->w; | |
| 351 Bmin = B->x; | |
| 352 Bmax = Bmin + B->w; | |
| 353 if(Bmin > Amin) | |
| 354 Amin = Bmin; | |
| 355 intersection->x = Amin; | |
| 356 if(Bmax < Amax) | |
| 357 Amax = Bmax; | |
| 358 intersection->w = Amax - Amin > 0 ? Amax - Amin : 0; | |
| 359 | |
| 360 /* Vertical intersection */ | |
| 361 Amin = A->y; | |
| 362 Amax = Amin + A->h; | |
| 363 Bmin = B->y; | |
| 364 Bmax = Bmin + B->h; | |
| 365 if(Bmin > Amin) | |
| 366 Amin = Bmin; | |
| 367 intersection->y = Amin; | |
| 368 if(Bmax < Amax) | |
| 369 Amax = Bmax; | |
| 370 intersection->h = Amax - Amin > 0 ? Amax - Amin : 0; | |
| 371 | |
| 372 return (intersection->w && intersection->h); | |
| 373 } | |
| 374 /* | |
| 375 * Set the clipping rectangle for a blittable surface | |
| 376 */ | |
|
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377 SDL_bool SDL_SetClipRect(SDL_Surface *surface, const SDL_Rect *rect) |
| 0 | 378 { |
| 379 SDL_Rect full_rect; | |
| 380 | |
| 381 /* Don't do anything if there's no surface to act on */ | |
| 382 if ( ! surface ) { | |
| 383 return SDL_FALSE; | |
| 384 } | |
| 385 | |
| 386 /* Set up the full surface rectangle */ | |
| 387 full_rect.x = 0; | |
| 388 full_rect.y = 0; | |
| 389 full_rect.w = surface->w; | |
| 390 full_rect.h = surface->h; | |
| 391 | |
| 392 /* Set the clipping rectangle */ | |
| 393 if ( ! rect ) { | |
| 394 surface->clip_rect = full_rect; | |
| 395 return 1; | |
| 396 } | |
| 397 return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect); | |
| 398 } | |
| 399 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect) | |
| 400 { | |
| 401 if ( surface && rect ) { | |
| 402 *rect = surface->clip_rect; | |
| 403 } | |
| 404 } | |
| 405 /* | |
| 406 * Set up a blit between two surfaces -- split into three parts: | |
| 407 * The upper part, SDL_UpperBlit(), performs clipping and rectangle | |
| 408 * verification. The lower part is a pointer to a low level | |
| 409 * accelerated blitting function. | |
| 410 * | |
| 411 * These parts are separated out and each used internally by this | |
| 412 * library in the optimimum places. They are exported so that if | |
| 413 * you know exactly what you are doing, you can optimize your code | |
| 414 * by calling the one(s) you need. | |
| 415 */ | |
| 416 int SDL_LowerBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
| 417 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 418 { | |
| 419 SDL_blit do_blit; | |
|
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420 SDL_Rect hw_srcrect; |
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421 SDL_Rect hw_dstrect; |
| 0 | 422 |
| 423 /* Check to make sure the blit mapping is valid */ | |
| 424 if ( (src->map->dst != dst) || | |
| 425 (src->map->dst->format_version != src->map->format_version) ) { | |
| 426 if ( SDL_MapSurface(src, dst) < 0 ) { | |
| 427 return(-1); | |
| 428 } | |
| 429 } | |
| 430 | |
| 431 /* Figure out which blitter to use */ | |
| 432 if ( (src->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
|
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433 if ( src == SDL_VideoSurface ) { |
|
519
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434 hw_srcrect = *srcrect; |
|
462
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435 hw_srcrect.x += current_video->offset_x; |
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436 hw_srcrect.y += current_video->offset_y; |
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437 srcrect = &hw_srcrect; |
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438 } |
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439 if ( dst == SDL_VideoSurface ) { |
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440 hw_dstrect = *dstrect; |
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441 hw_dstrect.x += current_video->offset_x; |
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442 hw_dstrect.y += current_video->offset_y; |
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443 dstrect = &hw_dstrect; |
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444 } |
| 0 | 445 do_blit = src->map->hw_blit; |
| 446 } else { | |
| 447 do_blit = src->map->sw_blit; | |
| 448 } | |
| 449 return(do_blit(src, srcrect, dst, dstrect)); | |
| 450 } | |
| 451 | |
| 452 | |
| 453 int SDL_UpperBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
| 454 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 455 { | |
| 456 SDL_Rect fulldst; | |
| 457 int srcx, srcy, w, h; | |
| 458 | |
| 459 /* Make sure the surfaces aren't locked */ | |
| 460 if ( ! src || ! dst ) { | |
| 461 SDL_SetError("SDL_UpperBlit: passed a NULL surface"); | |
| 462 return(-1); | |
| 463 } | |
| 464 if ( src->locked || dst->locked ) { | |
| 465 SDL_SetError("Surfaces must not be locked during blit"); | |
| 466 return(-1); | |
| 467 } | |
| 468 | |
| 469 /* If the destination rectangle is NULL, use the entire dest surface */ | |
| 470 if ( dstrect == NULL ) { | |
| 471 fulldst.x = fulldst.y = 0; | |
| 472 dstrect = &fulldst; | |
| 473 } | |
| 474 | |
| 475 /* clip the source rectangle to the source surface */ | |
| 476 if(srcrect) { | |
| 477 int maxw, maxh; | |
| 478 | |
| 479 srcx = srcrect->x; | |
| 480 w = srcrect->w; | |
| 481 if(srcx < 0) { | |
| 482 w += srcx; | |
| 483 dstrect->x -= srcx; | |
| 484 srcx = 0; | |
| 485 } | |
| 486 maxw = src->w - srcx; | |
| 487 if(maxw < w) | |
| 488 w = maxw; | |
| 489 | |
| 490 srcy = srcrect->y; | |
| 491 h = srcrect->h; | |
| 492 if(srcy < 0) { | |
| 493 h += srcy; | |
| 494 dstrect->y -= srcy; | |
| 495 srcy = 0; | |
| 496 } | |
| 497 maxh = src->h - srcy; | |
| 498 if(maxh < h) | |
| 499 h = maxh; | |
| 500 | |
| 501 } else { | |
| 502 srcx = srcy = 0; | |
| 503 w = src->w; | |
| 504 h = src->h; | |
| 505 } | |
| 506 | |
| 507 /* clip the destination rectangle against the clip rectangle */ | |
| 508 { | |
| 509 SDL_Rect *clip = &dst->clip_rect; | |
| 510 int dx, dy; | |
| 511 | |
| 512 dx = clip->x - dstrect->x; | |
| 513 if(dx > 0) { | |
| 514 w -= dx; | |
| 515 dstrect->x += dx; | |
| 516 srcx += dx; | |
| 517 } | |
| 518 dx = dstrect->x + w - clip->x - clip->w; | |
| 519 if(dx > 0) | |
| 520 w -= dx; | |
| 521 | |
| 522 dy = clip->y - dstrect->y; | |
| 523 if(dy > 0) { | |
| 524 h -= dy; | |
| 525 dstrect->y += dy; | |
| 526 srcy += dy; | |
| 527 } | |
| 528 dy = dstrect->y + h - clip->y - clip->h; | |
| 529 if(dy > 0) | |
| 530 h -= dy; | |
| 531 } | |
| 532 | |
| 533 if(w > 0 && h > 0) { | |
| 534 SDL_Rect sr; | |
| 535 sr.x = srcx; | |
| 536 sr.y = srcy; | |
| 537 sr.w = dstrect->w = w; | |
| 538 sr.h = dstrect->h = h; | |
| 539 return SDL_LowerBlit(src, &sr, dst, dstrect); | |
| 540 } | |
| 541 dstrect->w = dstrect->h = 0; | |
| 542 return 0; | |
| 543 } | |
| 544 | |
|
532
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545 static int SDL_FillRect1(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("1-bpp rect fill not yet implemented"); |
|
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549 return -1; |
|
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550 } |
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551 |
|
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552 static int SDL_FillRect4(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) |
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553 { |
|
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554 /* FIXME: We have to worry about packing order.. *sigh* */ |
|
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555 SDL_SetError("4-bpp rect fill not yet implemented"); |
|
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556 return -1; |
|
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557 } |
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|
558 |
| 0 | 559 /* |
| 560 * This function performs a fast fill of the given rectangle with 'color' | |
| 561 */ | |
| 562 int SDL_FillRect(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) | |
| 563 { | |
| 564 SDL_VideoDevice *video = current_video; | |
| 565 SDL_VideoDevice *this = current_video; | |
| 566 int x, y; | |
| 567 Uint8 *row; | |
| 568 | |
|
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569 /* This function doesn't work on surfaces < 8 bpp */ |
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570 if ( dst->format->BitsPerPixel < 8 ) { |
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571 switch(dst->format->BitsPerPixel) { |
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|
572 case 1: |
|
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573 return SDL_FillRect1(dst, dstrect, color); |
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574 break; |
|
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575 case 4: |
|
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576 return SDL_FillRect4(dst, dstrect, color); |
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577 break; |
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578 default: |
|
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579 SDL_SetError("Fill rect on unsupported surface format"); |
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580 return(-1); |
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581 break; |
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582 } |
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583 } |
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584 |
| 0 | 585 /* If 'dstrect' == NULL, then fill the whole surface */ |
| 586 if ( dstrect ) { | |
| 587 /* Perform clipping */ | |
| 588 if ( !SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect) ) { | |
| 589 return(0); | |
| 590 } | |
| 591 } else { | |
| 592 dstrect = &dst->clip_rect; | |
| 593 } | |
| 594 | |
| 595 /* Check for hardware acceleration */ | |
| 596 if ( ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) && | |
| 597 video->info.blit_fill ) { | |
|
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598 SDL_Rect hw_rect; |
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599 if ( dst == SDL_VideoSurface ) { |
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600 hw_rect = *dstrect; |
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601 hw_rect.x += current_video->offset_x; |
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602 hw_rect.y += current_video->offset_y; |
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603 dstrect = &hw_rect; |
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604 } |
| 0 | 605 return(video->FillHWRect(this, dst, dstrect, color)); |
| 606 } | |
| 607 | |
| 608 /* Perform software fill */ | |
| 609 if ( SDL_LockSurface(dst) != 0 ) { | |
| 610 return(-1); | |
| 611 } | |
| 612 row = (Uint8 *)dst->pixels+dstrect->y*dst->pitch+ | |
| 613 dstrect->x*dst->format->BytesPerPixel; | |
| 614 if ( dst->format->palette || (color == 0) ) { | |
| 615 x = dstrect->w*dst->format->BytesPerPixel; | |
| 616 if ( !color && !((long)row&3) && !(x&3) && !(dst->pitch&3) ) { | |
| 617 int n = x >> 2; | |
| 618 for ( y=dstrect->h; y; --y ) { | |
| 619 SDL_memset4(row, 0, n); | |
| 620 row += dst->pitch; | |
| 621 } | |
| 622 } else { | |
| 623 #ifdef __powerpc__ | |
| 624 /* | |
| 625 * memset() on PPC (both glibc and codewarrior) uses | |
| 626 * the dcbz (Data Cache Block Zero) instruction, which | |
| 627 * causes an alignment exception if the destination is | |
| 628 * uncachable, so only use it on software surfaces | |
| 629 */ | |
| 630 if((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) { | |
| 631 if(dstrect->w >= 8) { | |
| 632 /* | |
| 633 * 64-bit stores are probably most | |
| 634 * efficient to uncached video memory | |
| 635 */ | |
| 636 double fill; | |
| 637 memset(&fill, color, (sizeof fill)); | |
| 638 for(y = dstrect->h; y; y--) { | |
| 639 Uint8 *d = row; | |
| 640 unsigned n = x; | |
| 641 unsigned nn; | |
| 642 Uint8 c = color; | |
| 643 double f = fill; | |
| 644 while((unsigned long)d | |
| 645 & (sizeof(double) - 1)) { | |
| 646 *d++ = c; | |
| 647 n--; | |
| 648 } | |
| 649 nn = n / (sizeof(double) * 4); | |
| 650 while(nn) { | |
| 651 ((double *)d)[0] = f; | |
| 652 ((double *)d)[1] = f; | |
| 653 ((double *)d)[2] = f; | |
| 654 ((double *)d)[3] = f; | |
| 655 d += 4*sizeof(double); | |
| 656 nn--; | |
| 657 } | |
| 658 n &= ~(sizeof(double) * 4 - 1); | |
| 659 nn = n / sizeof(double); | |
| 660 while(nn) { | |
| 661 *(double *)d = f; | |
| 662 d += sizeof(double); | |
| 663 nn--; | |
| 664 } | |
| 665 n &= ~(sizeof(double) - 1); | |
| 666 while(n) { | |
| 667 *d++ = c; | |
| 668 n--; | |
| 669 } | |
| 670 row += dst->pitch; | |
| 671 } | |
| 672 } else { | |
| 673 /* narrow boxes */ | |
| 674 for(y = dstrect->h; y; y--) { | |
| 675 Uint8 *d = row; | |
| 676 Uint8 c = color; | |
| 677 int n = x; | |
| 678 while(n) { | |
| 679 *d++ = c; | |
| 680 n--; | |
| 681 } | |
| 682 row += dst->pitch; | |
| 683 } | |
| 684 } | |
| 685 } else | |
| 686 #endif /* __powerpc__ */ | |
| 687 { | |
| 688 for(y = dstrect->h; y; y--) { | |
| 689 memset(row, color, x); | |
| 690 row += dst->pitch; | |
| 691 } | |
| 692 } | |
| 693 } | |
| 694 } else { | |
| 695 switch (dst->format->BytesPerPixel) { | |
| 696 case 2: | |
| 697 for ( y=dstrect->h; y; --y ) { | |
| 698 Uint16 *pixels = (Uint16 *)row; | |
| 699 Uint16 c = color; | |
| 700 Uint32 cc = (Uint32)c << 16 | c; | |
| 701 int n = dstrect->w; | |
| 702 if((unsigned long)pixels & 3) { | |
| 703 *pixels++ = c; | |
| 704 n--; | |
| 705 } | |
| 706 if(n >> 1) | |
| 707 SDL_memset4(pixels, cc, n >> 1); | |
| 708 if(n & 1) | |
| 709 pixels[n - 1] = c; | |
| 710 row += dst->pitch; | |
| 711 } | |
| 712 break; | |
| 713 | |
| 714 case 3: | |
| 715 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) | |
| 716 color <<= 8; | |
| 717 for ( y=dstrect->h; y; --y ) { | |
| 718 Uint8 *pixels = row; | |
| 719 for ( x=dstrect->w; x; --x ) { | |
| 720 memcpy(pixels, &color, 3); | |
| 721 pixels += 3; | |
| 722 } | |
| 723 row += dst->pitch; | |
| 724 } | |
| 725 break; | |
| 726 | |
| 727 case 4: | |
| 728 for(y = dstrect->h; y; --y) { | |
| 729 SDL_memset4(row, color, dstrect->w); | |
| 730 row += dst->pitch; | |
| 731 } | |
| 732 break; | |
| 733 } | |
| 734 } | |
| 735 SDL_UnlockSurface(dst); | |
| 736 | |
| 737 /* We're done! */ | |
| 738 return(0); | |
| 739 } | |
| 740 | |
| 741 /* | |
| 742 * Lock a surface to directly access the pixels | |
| 743 */ | |
| 744 int SDL_LockSurface (SDL_Surface *surface) | |
| 745 { | |
| 746 if ( ! surface->locked ) { | |
| 747 /* Perform the lock */ | |
| 748 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
| 749 SDL_VideoDevice *video = current_video; | |
| 750 SDL_VideoDevice *this = current_video; | |
| 751 if ( video->LockHWSurface(this, surface) < 0 ) { | |
| 752 return(-1); | |
| 753 } | |
| 754 } | |
| 755 if ( surface->flags & SDL_RLEACCEL ) { | |
| 756 SDL_UnRLESurface(surface, 1); | |
| 757 surface->flags |= SDL_RLEACCEL; /* save accel'd state */ | |
| 758 } | |
| 759 /* This needs to be done here in case pixels changes value */ | |
| 760 surface->pixels = (Uint8 *)surface->pixels + surface->offset; | |
| 761 } | |
| 762 | |
| 763 /* Increment the surface lock count, for recursive locks */ | |
| 764 ++surface->locked; | |
| 765 | |
| 766 /* Ready to go.. */ | |
| 767 return(0); | |
| 768 } | |
| 769 /* | |
| 770 * Unlock a previously locked surface | |
| 771 */ | |
| 772 void SDL_UnlockSurface (SDL_Surface *surface) | |
| 773 { | |
| 774 /* Only perform an unlock if we are locked */ | |
| 775 if ( ! surface->locked || (--surface->locked > 0) ) { | |
| 776 return; | |
| 777 } | |
| 778 | |
| 779 /* Perform the unlock */ | |
| 780 surface->pixels = (Uint8 *)surface->pixels - surface->offset; | |
| 781 | |
| 782 /* Unlock hardware or accelerated surfaces */ | |
| 783 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
| 784 SDL_VideoDevice *video = current_video; | |
| 785 SDL_VideoDevice *this = current_video; | |
| 786 video->UnlockHWSurface(this, surface); | |
| 787 } else { | |
| 788 /* Update RLE encoded surface with new data */ | |
| 789 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 790 surface->flags &= ~SDL_RLEACCEL; /* stop lying */ | |
| 791 SDL_RLESurface(surface); | |
| 792 } | |
| 793 } | |
| 794 } | |
| 795 | |
| 796 /* | |
| 797 * Convert a surface into the specified pixel format. | |
| 798 */ | |
| 799 SDL_Surface * SDL_ConvertSurface (SDL_Surface *surface, | |
| 800 SDL_PixelFormat *format, Uint32 flags) | |
| 801 { | |
| 802 SDL_Surface *convert; | |
| 803 Uint32 colorkey = 0; | |
| 804 Uint8 alpha = 0; | |
| 805 Uint32 surface_flags; | |
| 806 SDL_Rect bounds; | |
| 807 | |
| 808 /* Check for empty destination palette! (results in empty image) */ | |
| 809 if ( format->palette != NULL ) { | |
| 810 int i; | |
| 811 for ( i=0; i<format->palette->ncolors; ++i ) { | |
| 812 if ( (format->palette->colors[i].r != 0) || | |
| 813 (format->palette->colors[i].g != 0) || | |
| 814 (format->palette->colors[i].b != 0) ) | |
| 815 break; | |
| 816 } | |
| 817 if ( i == format->palette->ncolors ) { | |
| 818 SDL_SetError("Empty destination palette"); | |
| 819 return(NULL); | |
| 820 } | |
| 821 } | |
| 822 | |
|
264
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823 /* Only create hw surfaces with alpha channel if hw alpha blits |
|
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824 are supported */ |
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825 if(format->Amask != 0 && (flags & SDL_HWSURFACE)) { |
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826 const SDL_VideoInfo *vi = SDL_GetVideoInfo(); |
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827 if(!vi || !vi->blit_hw_A) |
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828 flags &= ~SDL_HWSURFACE; |
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829 } |
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830 |
| 0 | 831 /* Create a new surface with the desired format */ |
| 832 convert = SDL_CreateRGBSurface(flags, | |
| 833 surface->w, surface->h, format->BitsPerPixel, | |
| 834 format->Rmask, format->Gmask, format->Bmask, format->Amask); | |
| 835 if ( convert == NULL ) { | |
| 836 return(NULL); | |
| 837 } | |
| 838 | |
| 839 /* Copy the palette if any */ | |
| 840 if ( format->palette && convert->format->palette ) { | |
| 841 memcpy(convert->format->palette->colors, | |
| 842 format->palette->colors, | |
| 843 format->palette->ncolors*sizeof(SDL_Color)); | |
| 844 convert->format->palette->ncolors = format->palette->ncolors; | |
| 845 } | |
| 846 | |
| 847 /* Save the original surface color key and alpha */ | |
| 848 surface_flags = surface->flags; | |
| 849 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 850 /* Convert colourkeyed surfaces to RGBA if requested */ | |
| 851 if((flags & SDL_SRCCOLORKEY) != SDL_SRCCOLORKEY | |
| 852 && format->Amask) { | |
| 853 surface_flags &= ~SDL_SRCCOLORKEY; | |
| 854 } else { | |
| 855 colorkey = surface->format->colorkey; | |
| 856 SDL_SetColorKey(surface, 0, 0); | |
| 857 } | |
| 858 } | |
| 859 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
|
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860 /* Copy over the alpha channel to RGBA if requested */ |
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861 if ( format->Amask ) { |
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862 surface->flags &= ~SDL_SRCALPHA; |
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863 } else { |
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864 alpha = surface->format->alpha; |
|
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865 SDL_SetAlpha(surface, 0, 0); |
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866 } |
| 0 | 867 } |
| 868 | |
| 869 /* Copy over the image data */ | |
| 870 bounds.x = 0; | |
| 871 bounds.y = 0; | |
| 872 bounds.w = surface->w; | |
| 873 bounds.h = surface->h; | |
| 874 SDL_LowerBlit(surface, &bounds, convert, &bounds); | |
| 875 | |
| 876 /* Clean up the original surface, and update converted surface */ | |
| 877 if ( convert != NULL ) { | |
| 878 SDL_SetClipRect(convert, &surface->clip_rect); | |
| 879 } | |
| 880 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 881 Uint32 cflags = surface_flags&(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
| 882 if ( convert != NULL ) { | |
| 883 Uint8 keyR, keyG, keyB; | |
| 884 | |
| 885 SDL_GetRGB(colorkey,surface->format,&keyR,&keyG,&keyB); | |
| 886 SDL_SetColorKey(convert, cflags|(flags&SDL_RLEACCELOK), | |
| 887 SDL_MapRGB(convert->format, keyR, keyG, keyB)); | |
| 888 } | |
| 889 SDL_SetColorKey(surface, cflags, colorkey); | |
| 890 } | |
| 891 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
| 892 Uint32 aflags = surface_flags&(SDL_SRCALPHA|SDL_RLEACCELOK); | |
| 893 if ( convert != NULL ) { | |
| 894 SDL_SetAlpha(convert, aflags|(flags&SDL_RLEACCELOK), | |
| 895 alpha); | |
| 896 } | |
|
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897 if ( format->Amask ) { |
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898 surface->flags |= SDL_SRCALPHA; |
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899 } else { |
|
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900 SDL_SetAlpha(surface, aflags, alpha); |
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901 } |
| 0 | 902 } |
| 903 | |
| 904 /* We're ready to go! */ | |
| 905 return(convert); | |
| 906 } | |
| 907 | |
| 908 /* | |
| 909 * Free a surface created by the above function. | |
| 910 */ | |
| 911 void SDL_FreeSurface (SDL_Surface *surface) | |
| 912 { | |
| 913 /* Free anything that's not NULL, and not the screen surface */ | |
| 914 if ((surface == NULL) || | |
| 915 (current_video && | |
| 916 ((surface == SDL_ShadowSurface)||(surface == SDL_VideoSurface)))) { | |
| 917 return; | |
| 918 } | |
| 919 if ( --surface->refcount > 0 ) { | |
| 920 return; | |
| 921 } | |
|
915
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922 while ( surface->locked > 0 ) { |
|
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923 SDL_UnlockSurface(surface); |
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924 } |
| 0 | 925 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { |
| 926 SDL_UnRLESurface(surface, 0); | |
| 927 } | |
| 928 if ( surface->format ) { | |
| 929 SDL_FreeFormat(surface->format); | |
| 930 surface->format = NULL; | |
| 931 } | |
| 932 if ( surface->map != NULL ) { | |
| 933 SDL_FreeBlitMap(surface->map); | |
| 934 surface->map = NULL; | |
| 935 } | |
|
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936 if ( surface->hwdata ) { |
| 0 | 937 SDL_VideoDevice *video = current_video; |
| 938 SDL_VideoDevice *this = current_video; | |
| 939 video->FreeHWSurface(this, surface); | |
| 940 } | |
| 941 if ( surface->pixels && | |
| 942 ((surface->flags & SDL_PREALLOC) != SDL_PREALLOC) ) { | |
| 943 free(surface->pixels); | |
| 944 } | |
| 945 free(surface); | |
| 946 #ifdef CHECK_LEAKS | |
| 947 --surfaces_allocated; | |
| 948 #endif | |
| 949 } |