Mercurial > sdl-ios-xcode
annotate src/video/SDL_surface.c @ 1312:c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
I batch edited these files, so please let me know if I've accidentally removed anybody's
credit here.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 01 Feb 2006 06:32:25 +0000 |
| parents | 86d0d01290ea |
| children | 450721ad5436 |
| 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 | |
| 23 #include <stdio.h> | |
| 24 #include <stdlib.h> | |
| 25 #include <string.h> | |
| 26 | |
| 27 #include "SDL_error.h" | |
| 28 #include "SDL_video.h" | |
| 29 #include "SDL_sysvideo.h" | |
| 30 #include "SDL_cursor_c.h" | |
| 31 #include "SDL_blit.h" | |
| 32 #include "SDL_RLEaccel_c.h" | |
| 33 #include "SDL_pixels_c.h" | |
| 34 #include "SDL_memops.h" | |
| 35 #include "SDL_leaks.h" | |
| 36 | |
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37 |
| 0 | 38 /* Public routines */ |
| 39 /* | |
| 40 * Create an empty RGB surface of the appropriate depth | |
| 41 */ | |
| 42 SDL_Surface * SDL_CreateRGBSurface (Uint32 flags, | |
| 43 int width, int height, int depth, | |
| 44 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) | |
| 45 { | |
| 46 SDL_VideoDevice *video = current_video; | |
| 47 SDL_VideoDevice *this = current_video; | |
| 48 SDL_Surface *screen; | |
| 49 SDL_Surface *surface; | |
| 50 | |
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51 /* Make sure the size requested doesn't overflow our datatypes */ |
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52 /* Next time I write a library like SDL, I'll use int for size. :) */ |
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53 if ( width >= 16384 || height >= 65536 ) { |
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54 SDL_SetError("Width or height is too large"); |
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55 return(NULL); |
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56 } |
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57 |
| 0 | 58 /* Check to see if we desire the surface in video memory */ |
| 59 if ( video ) { | |
| 60 screen = SDL_PublicSurface; | |
| 61 } else { | |
| 62 screen = NULL; | |
| 63 } | |
| 64 if ( screen && ((screen->flags&SDL_HWSURFACE) == SDL_HWSURFACE) ) { | |
| 65 if ( (flags&(SDL_SRCCOLORKEY|SDL_SRCALPHA)) != 0 ) { | |
| 66 flags |= SDL_HWSURFACE; | |
| 67 } | |
| 68 if ( (flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 69 if ( ! current_video->info.blit_hw_CC ) { | |
| 70 flags &= ~SDL_HWSURFACE; | |
| 71 } | |
| 72 } | |
| 73 if ( (flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
| 74 if ( ! current_video->info.blit_hw_A ) { | |
| 75 flags &= ~SDL_HWSURFACE; | |
| 76 } | |
| 77 } | |
| 78 } else { | |
| 79 flags &= ~SDL_HWSURFACE; | |
| 80 } | |
| 81 | |
| 82 /* Allocate the surface */ | |
| 83 surface = (SDL_Surface *)malloc(sizeof(*surface)); | |
| 84 if ( surface == NULL ) { | |
| 85 SDL_OutOfMemory(); | |
| 86 return(NULL); | |
| 87 } | |
| 88 surface->flags = SDL_SWSURFACE; | |
| 89 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
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90 if ((Amask) && (video->displayformatalphapixel)) |
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91 { |
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92 depth = video->displayformatalphapixel->BitsPerPixel; |
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93 Rmask = video->displayformatalphapixel->Rmask; |
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94 Gmask = video->displayformatalphapixel->Gmask; |
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95 Bmask = video->displayformatalphapixel->Bmask; |
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96 Amask = video->displayformatalphapixel->Amask; |
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97 } |
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98 else |
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99 { |
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100 depth = screen->format->BitsPerPixel; |
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101 Rmask = screen->format->Rmask; |
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102 Gmask = screen->format->Gmask; |
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103 Bmask = screen->format->Bmask; |
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104 Amask = screen->format->Amask; |
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105 } |
| 0 | 106 } |
| 107 surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask); | |
| 108 if ( surface->format == NULL ) { | |
| 109 free(surface); | |
| 110 return(NULL); | |
| 111 } | |
| 112 if ( Amask ) { | |
| 113 surface->flags |= SDL_SRCALPHA; | |
| 114 } | |
| 115 surface->w = width; | |
| 116 surface->h = height; | |
| 117 surface->pitch = SDL_CalculatePitch(surface); | |
| 118 surface->pixels = NULL; | |
| 119 surface->offset = 0; | |
| 120 surface->hwdata = NULL; | |
| 121 surface->locked = 0; | |
| 122 surface->map = NULL; | |
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123 surface->unused1 = 0; |
| 0 | 124 SDL_SetClipRect(surface, NULL); |
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125 SDL_FormatChanged(surface); |
| 0 | 126 |
| 127 /* Get the pixels */ | |
| 128 if ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) || | |
| 129 (video->AllocHWSurface(this, surface) < 0) ) { | |
| 130 if ( surface->w && surface->h ) { | |
| 131 surface->pixels = malloc(surface->h*surface->pitch); | |
| 132 if ( surface->pixels == NULL ) { | |
| 133 SDL_FreeSurface(surface); | |
| 134 SDL_OutOfMemory(); | |
| 135 return(NULL); | |
| 136 } | |
| 137 /* This is important for bitmaps */ | |
| 138 memset(surface->pixels, 0, surface->h*surface->pitch); | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 /* Allocate an empty mapping */ | |
| 143 surface->map = SDL_AllocBlitMap(); | |
| 144 if ( surface->map == NULL ) { | |
| 145 SDL_FreeSurface(surface); | |
| 146 return(NULL); | |
| 147 } | |
| 148 | |
| 149 /* The surface is ready to go */ | |
| 150 surface->refcount = 1; | |
| 151 #ifdef CHECK_LEAKS | |
| 152 ++surfaces_allocated; | |
| 153 #endif | |
| 154 return(surface); | |
| 155 } | |
| 156 /* | |
| 157 * Create an RGB surface from an existing memory buffer | |
| 158 */ | |
| 159 SDL_Surface * SDL_CreateRGBSurfaceFrom (void *pixels, | |
| 160 int width, int height, int depth, int pitch, | |
| 161 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) | |
| 162 { | |
| 163 SDL_Surface *surface; | |
| 164 | |
| 165 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, 0, 0, depth, | |
| 166 Rmask, Gmask, Bmask, Amask); | |
| 167 if ( surface != NULL ) { | |
| 168 surface->flags |= SDL_PREALLOC; | |
| 169 surface->pixels = pixels; | |
| 170 surface->w = width; | |
| 171 surface->h = height; | |
| 172 surface->pitch = pitch; | |
| 173 SDL_SetClipRect(surface, NULL); | |
| 174 } | |
| 175 return(surface); | |
| 176 } | |
| 177 /* | |
| 178 * Set the color key in a blittable surface | |
| 179 */ | |
| 180 int SDL_SetColorKey (SDL_Surface *surface, Uint32 flag, Uint32 key) | |
| 181 { | |
| 182 /* Sanity check the flag as it gets passed in */ | |
| 183 if ( flag & SDL_SRCCOLORKEY ) { | |
| 184 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
| 185 flag = (SDL_SRCCOLORKEY | SDL_RLEACCELOK); | |
| 186 } else { | |
| 187 flag = SDL_SRCCOLORKEY; | |
| 188 } | |
| 189 } else { | |
| 190 flag = 0; | |
| 191 } | |
| 192 | |
| 193 /* Optimize away operations that don't change anything */ | |
| 194 if ( (flag == (surface->flags & (SDL_SRCCOLORKEY|SDL_RLEACCELOK))) && | |
| 195 (key == surface->format->colorkey) ) { | |
| 196 return(0); | |
| 197 } | |
| 198 | |
| 199 /* UnRLE surfaces before we change the colorkey */ | |
| 200 if ( surface->flags & SDL_RLEACCEL ) { | |
| 201 SDL_UnRLESurface(surface, 1); | |
| 202 } | |
| 203 | |
| 204 if ( flag ) { | |
| 205 SDL_VideoDevice *video = current_video; | |
| 206 SDL_VideoDevice *this = current_video; | |
| 207 | |
| 208 | |
| 209 surface->flags |= SDL_SRCCOLORKEY; | |
| 210 surface->format->colorkey = key; | |
| 211 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 212 if ( (video->SetHWColorKey == NULL) || | |
| 213 (video->SetHWColorKey(this, surface, key) < 0) ) { | |
| 214 surface->flags &= ~SDL_HWACCEL; | |
| 215 } | |
| 216 } | |
| 217 if ( flag & SDL_RLEACCELOK ) { | |
| 218 surface->flags |= SDL_RLEACCELOK; | |
| 219 } else { | |
| 220 surface->flags &= ~SDL_RLEACCELOK; | |
| 221 } | |
| 222 } else { | |
| 223 surface->flags &= ~(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
| 224 surface->format->colorkey = 0; | |
| 225 } | |
| 226 SDL_InvalidateMap(surface->map); | |
| 227 return(0); | |
| 228 } | |
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229 /* This function sets the alpha channel of a surface */ |
| 0 | 230 int SDL_SetAlpha (SDL_Surface *surface, Uint32 flag, Uint8 value) |
| 231 { | |
| 232 Uint32 oldflags = surface->flags; | |
| 233 Uint32 oldalpha = surface->format->alpha; | |
| 234 | |
| 235 /* Sanity check the flag as it gets passed in */ | |
| 236 if ( flag & SDL_SRCALPHA ) { | |
| 237 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
| 238 flag = (SDL_SRCALPHA | SDL_RLEACCELOK); | |
| 239 } else { | |
| 240 flag = SDL_SRCALPHA; | |
| 241 } | |
| 242 } else { | |
| 243 flag = 0; | |
| 244 } | |
| 245 | |
| 246 /* Optimize away operations that don't change anything */ | |
| 247 if ( (flag == (surface->flags & (SDL_SRCALPHA|SDL_RLEACCELOK))) && | |
| 248 (!flag || value == oldalpha) ) { | |
| 249 return(0); | |
| 250 } | |
| 251 | |
| 252 if(!(flag & SDL_RLEACCELOK) && (surface->flags & SDL_RLEACCEL)) | |
| 253 SDL_UnRLESurface(surface, 1); | |
| 254 | |
| 255 if ( flag ) { | |
| 256 SDL_VideoDevice *video = current_video; | |
| 257 SDL_VideoDevice *this = current_video; | |
| 258 | |
| 259 surface->flags |= SDL_SRCALPHA; | |
| 260 surface->format->alpha = value; | |
| 261 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 262 if ( (video->SetHWAlpha == NULL) || | |
| 263 (video->SetHWAlpha(this, surface, value) < 0) ) { | |
| 264 surface->flags &= ~SDL_HWACCEL; | |
| 265 } | |
| 266 } | |
| 267 if ( flag & SDL_RLEACCELOK ) { | |
| 268 surface->flags |= SDL_RLEACCELOK; | |
| 269 } else { | |
| 270 surface->flags &= ~SDL_RLEACCELOK; | |
| 271 } | |
| 272 } else { | |
| 273 surface->flags &= ~SDL_SRCALPHA; | |
| 274 surface->format->alpha = SDL_ALPHA_OPAQUE; | |
| 275 } | |
| 276 /* | |
| 277 * The representation for software surfaces is independent of | |
| 278 * per-surface alpha, so no need to invalidate the blit mapping | |
| 279 * if just the alpha value was changed. (If either is 255, we still | |
| 280 * need to invalidate.) | |
| 281 */ | |
| 282 if((surface->flags & SDL_HWACCEL) == SDL_HWACCEL | |
| 283 || oldflags != surface->flags | |
| 284 || (((oldalpha + 1) ^ (value + 1)) & 0x100)) | |
| 285 SDL_InvalidateMap(surface->map); | |
| 286 return(0); | |
| 287 } | |
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288 int SDL_SetAlphaChannel(SDL_Surface *surface, Uint8 value) |
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289 { |
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290 int row, col; |
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291 int offset; |
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292 Uint8 *buf; |
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293 |
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294 if ( (surface->format->Amask != 0xFF000000) && |
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295 (surface->format->Amask != 0x000000FF) ) { |
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296 SDL_SetError("Unsupported surface alpha mask format"); |
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297 return -1; |
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298 } |
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299 |
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300 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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301 if ( surface->format->Amask == 0xFF000000 ) { |
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302 offset = 3; |
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303 } else { |
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304 offset = 0; |
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305 } |
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306 #else |
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307 if ( surface->format->Amask == 0xFF000000 ) { |
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308 offset = 0; |
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309 } else { |
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310 offset = 3; |
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311 } |
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312 #endif /* Byte ordering */ |
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313 |
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314 /* Quickly set the alpha channel of an RGBA or ARGB surface */ |
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315 if ( SDL_MUSTLOCK(surface) ) { |
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316 if ( SDL_LockSurface(surface) < 0 ) { |
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317 return -1; |
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318 } |
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319 } |
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320 row = surface->h; |
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321 while (row--) { |
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322 col = surface->w; |
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323 buf = (Uint8 *)surface->pixels + row * surface->pitch + offset; |
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324 while(col--) { |
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325 *buf = value; |
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326 buf += 4; |
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327 } |
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328 } |
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329 if ( SDL_MUSTLOCK(surface) ) { |
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330 SDL_UnlockSurface(surface); |
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331 } |
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332 return 0; |
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333 } |
| 0 | 334 |
| 335 /* | |
| 336 * A function to calculate the intersection of two rectangles: | |
| 337 * return true if the rectangles intersect, false otherwise | |
| 338 */ | |
| 339 static __inline__ | |
|
130
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340 SDL_bool SDL_IntersectRect(const SDL_Rect *A, const SDL_Rect *B, SDL_Rect *intersection) |
| 0 | 341 { |
| 342 int Amin, Amax, Bmin, Bmax; | |
| 343 | |
| 344 /* Horizontal intersection */ | |
| 345 Amin = A->x; | |
| 346 Amax = Amin + A->w; | |
| 347 Bmin = B->x; | |
| 348 Bmax = Bmin + B->w; | |
| 349 if(Bmin > Amin) | |
| 350 Amin = Bmin; | |
| 351 intersection->x = Amin; | |
| 352 if(Bmax < Amax) | |
| 353 Amax = Bmax; | |
| 354 intersection->w = Amax - Amin > 0 ? Amax - Amin : 0; | |
| 355 | |
| 356 /* Vertical intersection */ | |
| 357 Amin = A->y; | |
| 358 Amax = Amin + A->h; | |
| 359 Bmin = B->y; | |
| 360 Bmax = Bmin + B->h; | |
| 361 if(Bmin > Amin) | |
| 362 Amin = Bmin; | |
| 363 intersection->y = Amin; | |
| 364 if(Bmax < Amax) | |
| 365 Amax = Bmax; | |
| 366 intersection->h = Amax - Amin > 0 ? Amax - Amin : 0; | |
| 367 | |
| 368 return (intersection->w && intersection->h); | |
| 369 } | |
| 370 /* | |
| 371 * Set the clipping rectangle for a blittable surface | |
| 372 */ | |
|
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373 SDL_bool SDL_SetClipRect(SDL_Surface *surface, const SDL_Rect *rect) |
| 0 | 374 { |
| 375 SDL_Rect full_rect; | |
| 376 | |
| 377 /* Don't do anything if there's no surface to act on */ | |
| 378 if ( ! surface ) { | |
| 379 return SDL_FALSE; | |
| 380 } | |
| 381 | |
| 382 /* Set up the full surface rectangle */ | |
| 383 full_rect.x = 0; | |
| 384 full_rect.y = 0; | |
| 385 full_rect.w = surface->w; | |
| 386 full_rect.h = surface->h; | |
| 387 | |
| 388 /* Set the clipping rectangle */ | |
| 389 if ( ! rect ) { | |
| 390 surface->clip_rect = full_rect; | |
| 391 return 1; | |
| 392 } | |
| 393 return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect); | |
| 394 } | |
| 395 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect) | |
| 396 { | |
| 397 if ( surface && rect ) { | |
| 398 *rect = surface->clip_rect; | |
| 399 } | |
| 400 } | |
| 401 /* | |
| 402 * Set up a blit between two surfaces -- split into three parts: | |
| 403 * The upper part, SDL_UpperBlit(), performs clipping and rectangle | |
| 404 * verification. The lower part is a pointer to a low level | |
| 405 * accelerated blitting function. | |
| 406 * | |
| 407 * These parts are separated out and each used internally by this | |
| 408 * library in the optimimum places. They are exported so that if | |
| 409 * you know exactly what you are doing, you can optimize your code | |
| 410 * by calling the one(s) you need. | |
| 411 */ | |
| 412 int SDL_LowerBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
| 413 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 414 { | |
| 415 SDL_blit do_blit; | |
|
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416 SDL_Rect hw_srcrect; |
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417 SDL_Rect hw_dstrect; |
| 0 | 418 |
| 419 /* Check to make sure the blit mapping is valid */ | |
| 420 if ( (src->map->dst != dst) || | |
| 421 (src->map->dst->format_version != src->map->format_version) ) { | |
| 422 if ( SDL_MapSurface(src, dst) < 0 ) { | |
| 423 return(-1); | |
| 424 } | |
| 425 } | |
| 426 | |
| 427 /* Figure out which blitter to use */ | |
| 428 if ( (src->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
|
462
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429 if ( src == SDL_VideoSurface ) { |
|
519
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*** empty log message ***
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430 hw_srcrect = *srcrect; |
|
462
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431 hw_srcrect.x += current_video->offset_x; |
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432 hw_srcrect.y += current_video->offset_y; |
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433 srcrect = &hw_srcrect; |
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434 } |
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435 if ( dst == SDL_VideoSurface ) { |
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436 hw_dstrect = *dstrect; |
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437 hw_dstrect.x += current_video->offset_x; |
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438 hw_dstrect.y += current_video->offset_y; |
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Fixed offset bug in hardware accelerated fills and blits
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439 dstrect = &hw_dstrect; |
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440 } |
| 0 | 441 do_blit = src->map->hw_blit; |
| 442 } else { | |
| 443 do_blit = src->map->sw_blit; | |
| 444 } | |
| 445 return(do_blit(src, srcrect, dst, dstrect)); | |
| 446 } | |
| 447 | |
| 448 | |
| 449 int SDL_UpperBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
| 450 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 451 { | |
| 452 SDL_Rect fulldst; | |
| 453 int srcx, srcy, w, h; | |
| 454 | |
| 455 /* Make sure the surfaces aren't locked */ | |
| 456 if ( ! src || ! dst ) { | |
| 457 SDL_SetError("SDL_UpperBlit: passed a NULL surface"); | |
| 458 return(-1); | |
| 459 } | |
| 460 if ( src->locked || dst->locked ) { | |
| 461 SDL_SetError("Surfaces must not be locked during blit"); | |
| 462 return(-1); | |
| 463 } | |
| 464 | |
| 465 /* If the destination rectangle is NULL, use the entire dest surface */ | |
| 466 if ( dstrect == NULL ) { | |
| 467 fulldst.x = fulldst.y = 0; | |
| 468 dstrect = &fulldst; | |
| 469 } | |
| 470 | |
| 471 /* clip the source rectangle to the source surface */ | |
| 472 if(srcrect) { | |
| 473 int maxw, maxh; | |
| 474 | |
| 475 srcx = srcrect->x; | |
| 476 w = srcrect->w; | |
| 477 if(srcx < 0) { | |
| 478 w += srcx; | |
| 479 dstrect->x -= srcx; | |
| 480 srcx = 0; | |
| 481 } | |
| 482 maxw = src->w - srcx; | |
| 483 if(maxw < w) | |
| 484 w = maxw; | |
| 485 | |
| 486 srcy = srcrect->y; | |
| 487 h = srcrect->h; | |
| 488 if(srcy < 0) { | |
| 489 h += srcy; | |
| 490 dstrect->y -= srcy; | |
| 491 srcy = 0; | |
| 492 } | |
| 493 maxh = src->h - srcy; | |
| 494 if(maxh < h) | |
| 495 h = maxh; | |
| 496 | |
| 497 } else { | |
| 498 srcx = srcy = 0; | |
| 499 w = src->w; | |
| 500 h = src->h; | |
| 501 } | |
| 502 | |
| 503 /* clip the destination rectangle against the clip rectangle */ | |
| 504 { | |
| 505 SDL_Rect *clip = &dst->clip_rect; | |
| 506 int dx, dy; | |
| 507 | |
| 508 dx = clip->x - dstrect->x; | |
| 509 if(dx > 0) { | |
| 510 w -= dx; | |
| 511 dstrect->x += dx; | |
| 512 srcx += dx; | |
| 513 } | |
| 514 dx = dstrect->x + w - clip->x - clip->w; | |
| 515 if(dx > 0) | |
| 516 w -= dx; | |
| 517 | |
| 518 dy = clip->y - dstrect->y; | |
| 519 if(dy > 0) { | |
| 520 h -= dy; | |
| 521 dstrect->y += dy; | |
| 522 srcy += dy; | |
| 523 } | |
| 524 dy = dstrect->y + h - clip->y - clip->h; | |
| 525 if(dy > 0) | |
| 526 h -= dy; | |
| 527 } | |
| 528 | |
| 529 if(w > 0 && h > 0) { | |
| 530 SDL_Rect sr; | |
| 531 sr.x = srcx; | |
| 532 sr.y = srcy; | |
| 533 sr.w = dstrect->w = w; | |
| 534 sr.h = dstrect->h = h; | |
| 535 return SDL_LowerBlit(src, &sr, dst, dstrect); | |
| 536 } | |
| 537 dstrect->w = dstrect->h = 0; | |
| 538 return 0; | |
| 539 } | |
| 540 | |
|
532
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541 static int SDL_FillRect1(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) |
|
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|
542 { |
|
058d47b7a3b4
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|
543 /* FIXME: We have to worry about packing order.. *sigh* */ |
|
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544 SDL_SetError("1-bpp rect fill not yet implemented"); |
|
058d47b7a3b4
Return an error with color fills on less than 8 bpp surfaces.
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diff
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|
545 return -1; |
|
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Return an error with color fills on less than 8 bpp surfaces.
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|
546 } |
|
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|
547 |
|
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Return an error with color fills on less than 8 bpp surfaces.
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|
548 static int SDL_FillRect4(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) |
|
058d47b7a3b4
Return an error with color fills on less than 8 bpp surfaces.
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|
549 { |
|
058d47b7a3b4
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|
550 /* FIXME: We have to worry about packing order.. *sigh* */ |
|
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|
551 SDL_SetError("4-bpp rect fill not yet implemented"); |
|
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|
552 return -1; |
|
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|
553 } |
|
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|
554 |
| 0 | 555 /* |
| 556 * This function performs a fast fill of the given rectangle with 'color' | |
| 557 */ | |
| 558 int SDL_FillRect(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) | |
| 559 { | |
| 560 SDL_VideoDevice *video = current_video; | |
| 561 SDL_VideoDevice *this = current_video; | |
| 562 int x, y; | |
| 563 Uint8 *row; | |
| 564 | |
|
532
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|
565 /* This function doesn't work on surfaces < 8 bpp */ |
|
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|
566 if ( dst->format->BitsPerPixel < 8 ) { |
|
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567 switch(dst->format->BitsPerPixel) { |
|
058d47b7a3b4
Return an error with color fills on less than 8 bpp surfaces.
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diff
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|
568 case 1: |
|
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diff
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|
569 return SDL_FillRect1(dst, dstrect, color); |
|
058d47b7a3b4
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570 break; |
|
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|
571 case 4: |
|
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572 return SDL_FillRect4(dst, dstrect, color); |
|
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573 break; |
|
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574 default: |
|
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575 SDL_SetError("Fill rect on unsupported surface format"); |
|
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Return an error with color fills on less than 8 bpp surfaces.
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|
576 return(-1); |
|
058d47b7a3b4
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|
577 break; |
|
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diff
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|
578 } |
|
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|
579 } |
|
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580 |
| 0 | 581 /* If 'dstrect' == NULL, then fill the whole surface */ |
| 582 if ( dstrect ) { | |
| 583 /* Perform clipping */ | |
| 584 if ( !SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect) ) { | |
| 585 return(0); | |
| 586 } | |
| 587 } else { | |
| 588 dstrect = &dst->clip_rect; | |
| 589 } | |
| 590 | |
| 591 /* Check for hardware acceleration */ | |
| 592 if ( ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) && | |
| 593 video->info.blit_fill ) { | |
|
462
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|
594 SDL_Rect hw_rect; |
|
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595 if ( dst == SDL_VideoSurface ) { |
|
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Fixed offset bug in hardware accelerated fills and blits
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596 hw_rect = *dstrect; |
|
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Fixed offset bug in hardware accelerated fills and blits
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597 hw_rect.x += current_video->offset_x; |
|
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598 hw_rect.y += current_video->offset_y; |
|
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Fixed offset bug in hardware accelerated fills and blits
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parents:
441
diff
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|
599 dstrect = &hw_rect; |
|
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Fixed offset bug in hardware accelerated fills and blits
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|
600 } |
| 0 | 601 return(video->FillHWRect(this, dst, dstrect, color)); |
| 602 } | |
| 603 | |
| 604 /* Perform software fill */ | |
| 605 if ( SDL_LockSurface(dst) != 0 ) { | |
| 606 return(-1); | |
| 607 } | |
| 608 row = (Uint8 *)dst->pixels+dstrect->y*dst->pitch+ | |
| 609 dstrect->x*dst->format->BytesPerPixel; | |
| 610 if ( dst->format->palette || (color == 0) ) { | |
| 611 x = dstrect->w*dst->format->BytesPerPixel; | |
| 612 if ( !color && !((long)row&3) && !(x&3) && !(dst->pitch&3) ) { | |
| 613 int n = x >> 2; | |
| 614 for ( y=dstrect->h; y; --y ) { | |
| 615 SDL_memset4(row, 0, n); | |
| 616 row += dst->pitch; | |
| 617 } | |
| 618 } else { | |
| 619 #ifdef __powerpc__ | |
| 620 /* | |
| 621 * memset() on PPC (both glibc and codewarrior) uses | |
| 622 * the dcbz (Data Cache Block Zero) instruction, which | |
| 623 * causes an alignment exception if the destination is | |
| 624 * uncachable, so only use it on software surfaces | |
| 625 */ | |
| 626 if((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) { | |
| 627 if(dstrect->w >= 8) { | |
| 628 /* | |
| 629 * 64-bit stores are probably most | |
| 630 * efficient to uncached video memory | |
| 631 */ | |
| 632 double fill; | |
| 633 memset(&fill, color, (sizeof fill)); | |
| 634 for(y = dstrect->h; y; y--) { | |
| 635 Uint8 *d = row; | |
| 636 unsigned n = x; | |
| 637 unsigned nn; | |
| 638 Uint8 c = color; | |
| 639 double f = fill; | |
| 640 while((unsigned long)d | |
| 641 & (sizeof(double) - 1)) { | |
| 642 *d++ = c; | |
| 643 n--; | |
| 644 } | |
| 645 nn = n / (sizeof(double) * 4); | |
| 646 while(nn) { | |
| 647 ((double *)d)[0] = f; | |
| 648 ((double *)d)[1] = f; | |
| 649 ((double *)d)[2] = f; | |
| 650 ((double *)d)[3] = f; | |
| 651 d += 4*sizeof(double); | |
| 652 nn--; | |
| 653 } | |
| 654 n &= ~(sizeof(double) * 4 - 1); | |
| 655 nn = n / sizeof(double); | |
| 656 while(nn) { | |
| 657 *(double *)d = f; | |
| 658 d += sizeof(double); | |
| 659 nn--; | |
| 660 } | |
| 661 n &= ~(sizeof(double) - 1); | |
| 662 while(n) { | |
| 663 *d++ = c; | |
| 664 n--; | |
| 665 } | |
| 666 row += dst->pitch; | |
| 667 } | |
| 668 } else { | |
| 669 /* narrow boxes */ | |
| 670 for(y = dstrect->h; y; y--) { | |
| 671 Uint8 *d = row; | |
| 672 Uint8 c = color; | |
| 673 int n = x; | |
| 674 while(n) { | |
| 675 *d++ = c; | |
| 676 n--; | |
| 677 } | |
| 678 row += dst->pitch; | |
| 679 } | |
| 680 } | |
| 681 } else | |
| 682 #endif /* __powerpc__ */ | |
| 683 { | |
| 684 for(y = dstrect->h; y; y--) { | |
| 685 memset(row, color, x); | |
| 686 row += dst->pitch; | |
| 687 } | |
| 688 } | |
| 689 } | |
| 690 } else { | |
| 691 switch (dst->format->BytesPerPixel) { | |
| 692 case 2: | |
| 693 for ( y=dstrect->h; y; --y ) { | |
| 694 Uint16 *pixels = (Uint16 *)row; | |
| 695 Uint16 c = color; | |
| 696 Uint32 cc = (Uint32)c << 16 | c; | |
| 697 int n = dstrect->w; | |
| 698 if((unsigned long)pixels & 3) { | |
| 699 *pixels++ = c; | |
| 700 n--; | |
| 701 } | |
| 702 if(n >> 1) | |
| 703 SDL_memset4(pixels, cc, n >> 1); | |
| 704 if(n & 1) | |
| 705 pixels[n - 1] = c; | |
| 706 row += dst->pitch; | |
| 707 } | |
| 708 break; | |
| 709 | |
| 710 case 3: | |
|
1155
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
1052
diff
changeset
|
711 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
| 0 | 712 color <<= 8; |
|
1155
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
1052
diff
changeset
|
713 #endif |
| 0 | 714 for ( y=dstrect->h; y; --y ) { |
| 715 Uint8 *pixels = row; | |
| 716 for ( x=dstrect->w; x; --x ) { | |
| 717 memcpy(pixels, &color, 3); | |
| 718 pixels += 3; | |
| 719 } | |
| 720 row += dst->pitch; | |
| 721 } | |
| 722 break; | |
| 723 | |
| 724 case 4: | |
| 725 for(y = dstrect->h; y; --y) { | |
| 726 SDL_memset4(row, color, dstrect->w); | |
| 727 row += dst->pitch; | |
| 728 } | |
| 729 break; | |
| 730 } | |
| 731 } | |
| 732 SDL_UnlockSurface(dst); | |
| 733 | |
| 734 /* We're done! */ | |
| 735 return(0); | |
| 736 } | |
| 737 | |
| 738 /* | |
| 739 * Lock a surface to directly access the pixels | |
| 740 */ | |
| 741 int SDL_LockSurface (SDL_Surface *surface) | |
| 742 { | |
| 743 if ( ! surface->locked ) { | |
| 744 /* Perform the lock */ | |
| 745 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
| 746 SDL_VideoDevice *video = current_video; | |
| 747 SDL_VideoDevice *this = current_video; | |
| 748 if ( video->LockHWSurface(this, surface) < 0 ) { | |
| 749 return(-1); | |
| 750 } | |
| 751 } | |
| 752 if ( surface->flags & SDL_RLEACCEL ) { | |
| 753 SDL_UnRLESurface(surface, 1); | |
| 754 surface->flags |= SDL_RLEACCEL; /* save accel'd state */ | |
| 755 } | |
| 756 /* This needs to be done here in case pixels changes value */ | |
| 757 surface->pixels = (Uint8 *)surface->pixels + surface->offset; | |
| 758 } | |
| 759 | |
| 760 /* Increment the surface lock count, for recursive locks */ | |
| 761 ++surface->locked; | |
| 762 | |
| 763 /* Ready to go.. */ | |
| 764 return(0); | |
| 765 } | |
| 766 /* | |
| 767 * Unlock a previously locked surface | |
| 768 */ | |
| 769 void SDL_UnlockSurface (SDL_Surface *surface) | |
| 770 { | |
| 771 /* Only perform an unlock if we are locked */ | |
| 772 if ( ! surface->locked || (--surface->locked > 0) ) { | |
| 773 return; | |
| 774 } | |
| 775 | |
| 776 /* Perform the unlock */ | |
| 777 surface->pixels = (Uint8 *)surface->pixels - surface->offset; | |
| 778 | |
| 779 /* Unlock hardware or accelerated surfaces */ | |
| 780 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
| 781 SDL_VideoDevice *video = current_video; | |
| 782 SDL_VideoDevice *this = current_video; | |
| 783 video->UnlockHWSurface(this, surface); | |
| 784 } else { | |
| 785 /* Update RLE encoded surface with new data */ | |
| 786 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 787 surface->flags &= ~SDL_RLEACCEL; /* stop lying */ | |
| 788 SDL_RLESurface(surface); | |
| 789 } | |
| 790 } | |
| 791 } | |
| 792 | |
| 793 /* | |
| 794 * Convert a surface into the specified pixel format. | |
| 795 */ | |
| 796 SDL_Surface * SDL_ConvertSurface (SDL_Surface *surface, | |
| 797 SDL_PixelFormat *format, Uint32 flags) | |
| 798 { | |
| 799 SDL_Surface *convert; | |
| 800 Uint32 colorkey = 0; | |
| 801 Uint8 alpha = 0; | |
| 802 Uint32 surface_flags; | |
| 803 SDL_Rect bounds; | |
| 804 | |
| 805 /* Check for empty destination palette! (results in empty image) */ | |
| 806 if ( format->palette != NULL ) { | |
| 807 int i; | |
| 808 for ( i=0; i<format->palette->ncolors; ++i ) { | |
| 809 if ( (format->palette->colors[i].r != 0) || | |
| 810 (format->palette->colors[i].g != 0) || | |
| 811 (format->palette->colors[i].b != 0) ) | |
| 812 break; | |
| 813 } | |
| 814 if ( i == format->palette->ncolors ) { | |
| 815 SDL_SetError("Empty destination palette"); | |
| 816 return(NULL); | |
| 817 } | |
| 818 } | |
| 819 | |
|
264
c9cd3b564e4b
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
820 /* Only create hw surfaces with alpha channel if hw alpha blits |
|
c9cd3b564e4b
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
821 are supported */ |
|
c9cd3b564e4b
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
822 if(format->Amask != 0 && (flags & SDL_HWSURFACE)) { |
|
c9cd3b564e4b
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
823 const SDL_VideoInfo *vi = SDL_GetVideoInfo(); |
|
c9cd3b564e4b
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
824 if(!vi || !vi->blit_hw_A) |
|
c9cd3b564e4b
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
825 flags &= ~SDL_HWSURFACE; |
|
c9cd3b564e4b
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
826 } |
|
c9cd3b564e4b
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
827 |
| 0 | 828 /* Create a new surface with the desired format */ |
| 829 convert = SDL_CreateRGBSurface(flags, | |
| 830 surface->w, surface->h, format->BitsPerPixel, | |
| 831 format->Rmask, format->Gmask, format->Bmask, format->Amask); | |
| 832 if ( convert == NULL ) { | |
| 833 return(NULL); | |
| 834 } | |
| 835 | |
| 836 /* Copy the palette if any */ | |
| 837 if ( format->palette && convert->format->palette ) { | |
| 838 memcpy(convert->format->palette->colors, | |
| 839 format->palette->colors, | |
| 840 format->palette->ncolors*sizeof(SDL_Color)); | |
| 841 convert->format->palette->ncolors = format->palette->ncolors; | |
| 842 } | |
| 843 | |
| 844 /* Save the original surface color key and alpha */ | |
| 845 surface_flags = surface->flags; | |
| 846 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 847 /* Convert colourkeyed surfaces to RGBA if requested */ | |
| 848 if((flags & SDL_SRCCOLORKEY) != SDL_SRCCOLORKEY | |
| 849 && format->Amask) { | |
| 850 surface_flags &= ~SDL_SRCCOLORKEY; | |
| 851 } else { | |
| 852 colorkey = surface->format->colorkey; | |
| 853 SDL_SetColorKey(surface, 0, 0); | |
| 854 } | |
| 855 } | |
| 856 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
|
431
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
857 /* Copy over the alpha channel to RGBA if requested */ |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
858 if ( format->Amask ) { |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
859 surface->flags &= ~SDL_SRCALPHA; |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
860 } else { |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
861 alpha = surface->format->alpha; |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
862 SDL_SetAlpha(surface, 0, 0); |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
863 } |
| 0 | 864 } |
| 865 | |
| 866 /* Copy over the image data */ | |
| 867 bounds.x = 0; | |
| 868 bounds.y = 0; | |
| 869 bounds.w = surface->w; | |
| 870 bounds.h = surface->h; | |
| 871 SDL_LowerBlit(surface, &bounds, convert, &bounds); | |
| 872 | |
| 873 /* Clean up the original surface, and update converted surface */ | |
| 874 if ( convert != NULL ) { | |
| 875 SDL_SetClipRect(convert, &surface->clip_rect); | |
| 876 } | |
| 877 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
| 878 Uint32 cflags = surface_flags&(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
| 879 if ( convert != NULL ) { | |
| 880 Uint8 keyR, keyG, keyB; | |
| 881 | |
| 882 SDL_GetRGB(colorkey,surface->format,&keyR,&keyG,&keyB); | |
| 883 SDL_SetColorKey(convert, cflags|(flags&SDL_RLEACCELOK), | |
| 884 SDL_MapRGB(convert->format, keyR, keyG, keyB)); | |
| 885 } | |
| 886 SDL_SetColorKey(surface, cflags, colorkey); | |
| 887 } | |
| 888 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
| 889 Uint32 aflags = surface_flags&(SDL_SRCALPHA|SDL_RLEACCELOK); | |
| 890 if ( convert != NULL ) { | |
| 891 SDL_SetAlpha(convert, aflags|(flags&SDL_RLEACCELOK), | |
| 892 alpha); | |
| 893 } | |
|
431
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
894 if ( format->Amask ) { |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
895 surface->flags |= SDL_SRCALPHA; |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
896 } else { |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
897 SDL_SetAlpha(surface, aflags, alpha); |
|
41cadcba32e8
Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
Sam Lantinga <slouken@libsdl.org>
parents:
422
diff
changeset
|
898 } |
| 0 | 899 } |
| 900 | |
| 901 /* We're ready to go! */ | |
| 902 return(convert); | |
| 903 } | |
| 904 | |
| 905 /* | |
| 906 * Free a surface created by the above function. | |
| 907 */ | |
| 908 void SDL_FreeSurface (SDL_Surface *surface) | |
| 909 { | |
| 910 /* Free anything that's not NULL, and not the screen surface */ | |
| 911 if ((surface == NULL) || | |
| 912 (current_video && | |
| 913 ((surface == SDL_ShadowSurface)||(surface == SDL_VideoSurface)))) { | |
| 914 return; | |
| 915 } | |
| 916 if ( --surface->refcount > 0 ) { | |
| 917 return; | |
| 918 } | |
|
915
01cddd0f2efb
You can't free locked surfaces!
Sam Lantinga <slouken@libsdl.org>
parents:
845
diff
changeset
|
919 while ( surface->locked > 0 ) { |
|
01cddd0f2efb
You can't free locked surfaces!
Sam Lantinga <slouken@libsdl.org>
parents:
845
diff
changeset
|
920 SDL_UnlockSurface(surface); |
|
01cddd0f2efb
You can't free locked surfaces!
Sam Lantinga <slouken@libsdl.org>
parents:
845
diff
changeset
|
921 } |
| 0 | 922 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { |
| 923 SDL_UnRLESurface(surface, 0); | |
| 924 } | |
| 925 if ( surface->format ) { | |
| 926 SDL_FreeFormat(surface->format); | |
| 927 surface->format = NULL; | |
| 928 } | |
| 929 if ( surface->map != NULL ) { | |
| 930 SDL_FreeBlitMap(surface->map); | |
| 931 surface->map = NULL; | |
| 932 } | |
|
422
b1b9ee41be70
Memory leak fix for DirectX software surfaces
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
933 if ( surface->hwdata ) { |
| 0 | 934 SDL_VideoDevice *video = current_video; |
| 935 SDL_VideoDevice *this = current_video; | |
| 936 video->FreeHWSurface(this, surface); | |
| 937 } | |
| 938 if ( surface->pixels && | |
| 939 ((surface->flags & SDL_PREALLOC) != SDL_PREALLOC) ) { | |
| 940 free(surface->pixels); | |
| 941 } | |
| 942 free(surface); | |
| 943 #ifdef CHECK_LEAKS | |
| 944 --surfaces_allocated; | |
| 945 #endif | |
| 946 } |