Mercurial > sdl-ios-xcode
annotate src/video/SDL_surface.c @ 1336:3692456e7b0f
Use SDL_ prefixed versions of C library functions.
FIXME:
Change #include <stdlib.h> to #include "SDL_stdlib.h"
Change #include <string.h> to #include "SDL_string.h"
Make sure nothing else broke because of this...
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 07 Feb 2006 06:59:48 +0000 |
parents | 450721ad5436 |
children | 604d73db6802 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
22 | |
23 #include "SDL_error.h" | |
24 #include "SDL_video.h" | |
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25 #include "SDL_stdlib.h" |
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26 #include "SDL_string.h" |
0 | 27 #include "SDL_sysvideo.h" |
28 #include "SDL_cursor_c.h" | |
29 #include "SDL_blit.h" | |
30 #include "SDL_RLEaccel_c.h" | |
31 #include "SDL_pixels_c.h" | |
32 #include "SDL_leaks.h" | |
33 | |
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34 |
0 | 35 /* Public routines */ |
36 /* | |
37 * Create an empty RGB surface of the appropriate depth | |
38 */ | |
39 SDL_Surface * SDL_CreateRGBSurface (Uint32 flags, | |
40 int width, int height, int depth, | |
41 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) | |
42 { | |
43 SDL_VideoDevice *video = current_video; | |
44 SDL_VideoDevice *this = current_video; | |
45 SDL_Surface *screen; | |
46 SDL_Surface *surface; | |
47 | |
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48 /* Make sure the size requested doesn't overflow our datatypes */ |
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49 /* Next time I write a library like SDL, I'll use int for size. :) */ |
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50 if ( width >= 16384 || height >= 65536 ) { |
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51 SDL_SetError("Width or height is too large"); |
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52 return(NULL); |
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53 } |
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54 |
0 | 55 /* Check to see if we desire the surface in video memory */ |
56 if ( video ) { | |
57 screen = SDL_PublicSurface; | |
58 } else { | |
59 screen = NULL; | |
60 } | |
61 if ( screen && ((screen->flags&SDL_HWSURFACE) == SDL_HWSURFACE) ) { | |
62 if ( (flags&(SDL_SRCCOLORKEY|SDL_SRCALPHA)) != 0 ) { | |
63 flags |= SDL_HWSURFACE; | |
64 } | |
65 if ( (flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
66 if ( ! current_video->info.blit_hw_CC ) { | |
67 flags &= ~SDL_HWSURFACE; | |
68 } | |
69 } | |
70 if ( (flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
71 if ( ! current_video->info.blit_hw_A ) { | |
72 flags &= ~SDL_HWSURFACE; | |
73 } | |
74 } | |
75 } else { | |
76 flags &= ~SDL_HWSURFACE; | |
77 } | |
78 | |
79 /* Allocate the surface */ | |
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80 surface = (SDL_Surface *)SDL_malloc(sizeof(*surface)); |
0 | 81 if ( surface == NULL ) { |
82 SDL_OutOfMemory(); | |
83 return(NULL); | |
84 } | |
85 surface->flags = SDL_SWSURFACE; | |
86 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
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87 if ((Amask) && (video->displayformatalphapixel)) |
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88 { |
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89 depth = video->displayformatalphapixel->BitsPerPixel; |
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90 Rmask = video->displayformatalphapixel->Rmask; |
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91 Gmask = video->displayformatalphapixel->Gmask; |
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92 Bmask = video->displayformatalphapixel->Bmask; |
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93 Amask = video->displayformatalphapixel->Amask; |
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94 } |
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95 else |
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96 { |
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97 depth = screen->format->BitsPerPixel; |
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98 Rmask = screen->format->Rmask; |
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99 Gmask = screen->format->Gmask; |
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100 Bmask = screen->format->Bmask; |
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101 Amask = screen->format->Amask; |
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102 } |
0 | 103 } |
104 surface->format = SDL_AllocFormat(depth, Rmask, Gmask, Bmask, Amask); | |
105 if ( surface->format == NULL ) { | |
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106 SDL_free(surface); |
0 | 107 return(NULL); |
108 } | |
109 if ( Amask ) { | |
110 surface->flags |= SDL_SRCALPHA; | |
111 } | |
112 surface->w = width; | |
113 surface->h = height; | |
114 surface->pitch = SDL_CalculatePitch(surface); | |
115 surface->pixels = NULL; | |
116 surface->offset = 0; | |
117 surface->hwdata = NULL; | |
118 surface->locked = 0; | |
119 surface->map = NULL; | |
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120 surface->unused1 = 0; |
0 | 121 SDL_SetClipRect(surface, NULL); |
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122 SDL_FormatChanged(surface); |
0 | 123 |
124 /* Get the pixels */ | |
125 if ( ((flags&SDL_HWSURFACE) == SDL_SWSURFACE) || | |
126 (video->AllocHWSurface(this, surface) < 0) ) { | |
127 if ( surface->w && surface->h ) { | |
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128 surface->pixels = SDL_malloc(surface->h*surface->pitch); |
0 | 129 if ( surface->pixels == NULL ) { |
130 SDL_FreeSurface(surface); | |
131 SDL_OutOfMemory(); | |
132 return(NULL); | |
133 } | |
134 /* This is important for bitmaps */ | |
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135 SDL_memset(surface->pixels, 0, surface->h*surface->pitch); |
0 | 136 } |
137 } | |
138 | |
139 /* Allocate an empty mapping */ | |
140 surface->map = SDL_AllocBlitMap(); | |
141 if ( surface->map == NULL ) { | |
142 SDL_FreeSurface(surface); | |
143 return(NULL); | |
144 } | |
145 | |
146 /* The surface is ready to go */ | |
147 surface->refcount = 1; | |
148 #ifdef CHECK_LEAKS | |
149 ++surfaces_allocated; | |
150 #endif | |
151 return(surface); | |
152 } | |
153 /* | |
154 * Create an RGB surface from an existing memory buffer | |
155 */ | |
156 SDL_Surface * SDL_CreateRGBSurfaceFrom (void *pixels, | |
157 int width, int height, int depth, int pitch, | |
158 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) | |
159 { | |
160 SDL_Surface *surface; | |
161 | |
162 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, 0, 0, depth, | |
163 Rmask, Gmask, Bmask, Amask); | |
164 if ( surface != NULL ) { | |
165 surface->flags |= SDL_PREALLOC; | |
166 surface->pixels = pixels; | |
167 surface->w = width; | |
168 surface->h = height; | |
169 surface->pitch = pitch; | |
170 SDL_SetClipRect(surface, NULL); | |
171 } | |
172 return(surface); | |
173 } | |
174 /* | |
175 * Set the color key in a blittable surface | |
176 */ | |
177 int SDL_SetColorKey (SDL_Surface *surface, Uint32 flag, Uint32 key) | |
178 { | |
179 /* Sanity check the flag as it gets passed in */ | |
180 if ( flag & SDL_SRCCOLORKEY ) { | |
181 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
182 flag = (SDL_SRCCOLORKEY | SDL_RLEACCELOK); | |
183 } else { | |
184 flag = SDL_SRCCOLORKEY; | |
185 } | |
186 } else { | |
187 flag = 0; | |
188 } | |
189 | |
190 /* Optimize away operations that don't change anything */ | |
191 if ( (flag == (surface->flags & (SDL_SRCCOLORKEY|SDL_RLEACCELOK))) && | |
192 (key == surface->format->colorkey) ) { | |
193 return(0); | |
194 } | |
195 | |
196 /* UnRLE surfaces before we change the colorkey */ | |
197 if ( surface->flags & SDL_RLEACCEL ) { | |
198 SDL_UnRLESurface(surface, 1); | |
199 } | |
200 | |
201 if ( flag ) { | |
202 SDL_VideoDevice *video = current_video; | |
203 SDL_VideoDevice *this = current_video; | |
204 | |
205 | |
206 surface->flags |= SDL_SRCCOLORKEY; | |
207 surface->format->colorkey = key; | |
208 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
209 if ( (video->SetHWColorKey == NULL) || | |
210 (video->SetHWColorKey(this, surface, key) < 0) ) { | |
211 surface->flags &= ~SDL_HWACCEL; | |
212 } | |
213 } | |
214 if ( flag & SDL_RLEACCELOK ) { | |
215 surface->flags |= SDL_RLEACCELOK; | |
216 } else { | |
217 surface->flags &= ~SDL_RLEACCELOK; | |
218 } | |
219 } else { | |
220 surface->flags &= ~(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
221 surface->format->colorkey = 0; | |
222 } | |
223 SDL_InvalidateMap(surface->map); | |
224 return(0); | |
225 } | |
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226 /* This function sets the alpha channel of a surface */ |
0 | 227 int SDL_SetAlpha (SDL_Surface *surface, Uint32 flag, Uint8 value) |
228 { | |
229 Uint32 oldflags = surface->flags; | |
230 Uint32 oldalpha = surface->format->alpha; | |
231 | |
232 /* Sanity check the flag as it gets passed in */ | |
233 if ( flag & SDL_SRCALPHA ) { | |
234 if ( flag & (SDL_RLEACCEL|SDL_RLEACCELOK) ) { | |
235 flag = (SDL_SRCALPHA | SDL_RLEACCELOK); | |
236 } else { | |
237 flag = SDL_SRCALPHA; | |
238 } | |
239 } else { | |
240 flag = 0; | |
241 } | |
242 | |
243 /* Optimize away operations that don't change anything */ | |
244 if ( (flag == (surface->flags & (SDL_SRCALPHA|SDL_RLEACCELOK))) && | |
245 (!flag || value == oldalpha) ) { | |
246 return(0); | |
247 } | |
248 | |
249 if(!(flag & SDL_RLEACCELOK) && (surface->flags & SDL_RLEACCEL)) | |
250 SDL_UnRLESurface(surface, 1); | |
251 | |
252 if ( flag ) { | |
253 SDL_VideoDevice *video = current_video; | |
254 SDL_VideoDevice *this = current_video; | |
255 | |
256 surface->flags |= SDL_SRCALPHA; | |
257 surface->format->alpha = value; | |
258 if ( (surface->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
259 if ( (video->SetHWAlpha == NULL) || | |
260 (video->SetHWAlpha(this, surface, value) < 0) ) { | |
261 surface->flags &= ~SDL_HWACCEL; | |
262 } | |
263 } | |
264 if ( flag & SDL_RLEACCELOK ) { | |
265 surface->flags |= SDL_RLEACCELOK; | |
266 } else { | |
267 surface->flags &= ~SDL_RLEACCELOK; | |
268 } | |
269 } else { | |
270 surface->flags &= ~SDL_SRCALPHA; | |
271 surface->format->alpha = SDL_ALPHA_OPAQUE; | |
272 } | |
273 /* | |
274 * The representation for software surfaces is independent of | |
275 * per-surface alpha, so no need to invalidate the blit mapping | |
276 * if just the alpha value was changed. (If either is 255, we still | |
277 * need to invalidate.) | |
278 */ | |
279 if((surface->flags & SDL_HWACCEL) == SDL_HWACCEL | |
280 || oldflags != surface->flags | |
281 || (((oldalpha + 1) ^ (value + 1)) & 0x100)) | |
282 SDL_InvalidateMap(surface->map); | |
283 return(0); | |
284 } | |
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285 int SDL_SetAlphaChannel(SDL_Surface *surface, Uint8 value) |
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286 { |
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287 int row, col; |
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288 int offset; |
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289 Uint8 *buf; |
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290 |
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291 if ( (surface->format->Amask != 0xFF000000) && |
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292 (surface->format->Amask != 0x000000FF) ) { |
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293 SDL_SetError("Unsupported surface alpha mask format"); |
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294 return -1; |
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295 } |
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296 |
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297 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
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298 if ( surface->format->Amask == 0xFF000000 ) { |
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299 offset = 3; |
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300 } else { |
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301 offset = 0; |
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302 } |
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303 #else |
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304 if ( surface->format->Amask == 0xFF000000 ) { |
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305 offset = 0; |
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306 } else { |
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307 offset = 3; |
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308 } |
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309 #endif /* Byte ordering */ |
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310 |
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311 /* Quickly set the alpha channel of an RGBA or ARGB surface */ |
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312 if ( SDL_MUSTLOCK(surface) ) { |
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313 if ( SDL_LockSurface(surface) < 0 ) { |
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314 return -1; |
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315 } |
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316 } |
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317 row = surface->h; |
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318 while (row--) { |
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319 col = surface->w; |
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320 buf = (Uint8 *)surface->pixels + row * surface->pitch + offset; |
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321 while(col--) { |
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322 *buf = value; |
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323 buf += 4; |
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324 } |
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325 } |
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326 if ( SDL_MUSTLOCK(surface) ) { |
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327 SDL_UnlockSurface(surface); |
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328 } |
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329 return 0; |
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330 } |
0 | 331 |
332 /* | |
333 * A function to calculate the intersection of two rectangles: | |
334 * return true if the rectangles intersect, false otherwise | |
335 */ | |
336 static __inline__ | |
130
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337 SDL_bool SDL_IntersectRect(const SDL_Rect *A, const SDL_Rect *B, SDL_Rect *intersection) |
0 | 338 { |
339 int Amin, Amax, Bmin, Bmax; | |
340 | |
341 /* Horizontal intersection */ | |
342 Amin = A->x; | |
343 Amax = Amin + A->w; | |
344 Bmin = B->x; | |
345 Bmax = Bmin + B->w; | |
346 if(Bmin > Amin) | |
347 Amin = Bmin; | |
348 intersection->x = Amin; | |
349 if(Bmax < Amax) | |
350 Amax = Bmax; | |
351 intersection->w = Amax - Amin > 0 ? Amax - Amin : 0; | |
352 | |
353 /* Vertical intersection */ | |
354 Amin = A->y; | |
355 Amax = Amin + A->h; | |
356 Bmin = B->y; | |
357 Bmax = Bmin + B->h; | |
358 if(Bmin > Amin) | |
359 Amin = Bmin; | |
360 intersection->y = Amin; | |
361 if(Bmax < Amax) | |
362 Amax = Bmax; | |
363 intersection->h = Amax - Amin > 0 ? Amax - Amin : 0; | |
364 | |
365 return (intersection->w && intersection->h); | |
366 } | |
367 /* | |
368 * Set the clipping rectangle for a blittable surface | |
369 */ | |
130
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370 SDL_bool SDL_SetClipRect(SDL_Surface *surface, const SDL_Rect *rect) |
0 | 371 { |
372 SDL_Rect full_rect; | |
373 | |
374 /* Don't do anything if there's no surface to act on */ | |
375 if ( ! surface ) { | |
376 return SDL_FALSE; | |
377 } | |
378 | |
379 /* Set up the full surface rectangle */ | |
380 full_rect.x = 0; | |
381 full_rect.y = 0; | |
382 full_rect.w = surface->w; | |
383 full_rect.h = surface->h; | |
384 | |
385 /* Set the clipping rectangle */ | |
386 if ( ! rect ) { | |
387 surface->clip_rect = full_rect; | |
388 return 1; | |
389 } | |
390 return SDL_IntersectRect(rect, &full_rect, &surface->clip_rect); | |
391 } | |
392 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect) | |
393 { | |
394 if ( surface && rect ) { | |
395 *rect = surface->clip_rect; | |
396 } | |
397 } | |
398 /* | |
399 * Set up a blit between two surfaces -- split into three parts: | |
400 * The upper part, SDL_UpperBlit(), performs clipping and rectangle | |
401 * verification. The lower part is a pointer to a low level | |
402 * accelerated blitting function. | |
403 * | |
404 * These parts are separated out and each used internally by this | |
405 * library in the optimimum places. They are exported so that if | |
406 * you know exactly what you are doing, you can optimize your code | |
407 * by calling the one(s) you need. | |
408 */ | |
409 int SDL_LowerBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
410 SDL_Surface *dst, SDL_Rect *dstrect) | |
411 { | |
412 SDL_blit do_blit; | |
462
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413 SDL_Rect hw_srcrect; |
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414 SDL_Rect hw_dstrect; |
0 | 415 |
416 /* Check to make sure the blit mapping is valid */ | |
417 if ( (src->map->dst != dst) || | |
418 (src->map->dst->format_version != src->map->format_version) ) { | |
419 if ( SDL_MapSurface(src, dst) < 0 ) { | |
420 return(-1); | |
421 } | |
422 } | |
423 | |
424 /* Figure out which blitter to use */ | |
425 if ( (src->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
462
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426 if ( src == SDL_VideoSurface ) { |
519
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*** empty log message ***
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427 hw_srcrect = *srcrect; |
462
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428 hw_srcrect.x += current_video->offset_x; |
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429 hw_srcrect.y += current_video->offset_y; |
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430 srcrect = &hw_srcrect; |
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431 } |
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432 if ( dst == SDL_VideoSurface ) { |
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433 hw_dstrect = *dstrect; |
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434 hw_dstrect.x += current_video->offset_x; |
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435 hw_dstrect.y += current_video->offset_y; |
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436 dstrect = &hw_dstrect; |
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437 } |
0 | 438 do_blit = src->map->hw_blit; |
439 } else { | |
440 do_blit = src->map->sw_blit; | |
441 } | |
442 return(do_blit(src, srcrect, dst, dstrect)); | |
443 } | |
444 | |
445 | |
446 int SDL_UpperBlit (SDL_Surface *src, SDL_Rect *srcrect, | |
447 SDL_Surface *dst, SDL_Rect *dstrect) | |
448 { | |
449 SDL_Rect fulldst; | |
450 int srcx, srcy, w, h; | |
451 | |
452 /* Make sure the surfaces aren't locked */ | |
453 if ( ! src || ! dst ) { | |
454 SDL_SetError("SDL_UpperBlit: passed a NULL surface"); | |
455 return(-1); | |
456 } | |
457 if ( src->locked || dst->locked ) { | |
458 SDL_SetError("Surfaces must not be locked during blit"); | |
459 return(-1); | |
460 } | |
461 | |
462 /* If the destination rectangle is NULL, use the entire dest surface */ | |
463 if ( dstrect == NULL ) { | |
464 fulldst.x = fulldst.y = 0; | |
465 dstrect = &fulldst; | |
466 } | |
467 | |
468 /* clip the source rectangle to the source surface */ | |
469 if(srcrect) { | |
470 int maxw, maxh; | |
471 | |
472 srcx = srcrect->x; | |
473 w = srcrect->w; | |
474 if(srcx < 0) { | |
475 w += srcx; | |
476 dstrect->x -= srcx; | |
477 srcx = 0; | |
478 } | |
479 maxw = src->w - srcx; | |
480 if(maxw < w) | |
481 w = maxw; | |
482 | |
483 srcy = srcrect->y; | |
484 h = srcrect->h; | |
485 if(srcy < 0) { | |
486 h += srcy; | |
487 dstrect->y -= srcy; | |
488 srcy = 0; | |
489 } | |
490 maxh = src->h - srcy; | |
491 if(maxh < h) | |
492 h = maxh; | |
493 | |
494 } else { | |
495 srcx = srcy = 0; | |
496 w = src->w; | |
497 h = src->h; | |
498 } | |
499 | |
500 /* clip the destination rectangle against the clip rectangle */ | |
501 { | |
502 SDL_Rect *clip = &dst->clip_rect; | |
503 int dx, dy; | |
504 | |
505 dx = clip->x - dstrect->x; | |
506 if(dx > 0) { | |
507 w -= dx; | |
508 dstrect->x += dx; | |
509 srcx += dx; | |
510 } | |
511 dx = dstrect->x + w - clip->x - clip->w; | |
512 if(dx > 0) | |
513 w -= dx; | |
514 | |
515 dy = clip->y - dstrect->y; | |
516 if(dy > 0) { | |
517 h -= dy; | |
518 dstrect->y += dy; | |
519 srcy += dy; | |
520 } | |
521 dy = dstrect->y + h - clip->y - clip->h; | |
522 if(dy > 0) | |
523 h -= dy; | |
524 } | |
525 | |
526 if(w > 0 && h > 0) { | |
527 SDL_Rect sr; | |
528 sr.x = srcx; | |
529 sr.y = srcy; | |
530 sr.w = dstrect->w = w; | |
531 sr.h = dstrect->h = h; | |
532 return SDL_LowerBlit(src, &sr, dst, dstrect); | |
533 } | |
534 dstrect->w = dstrect->h = 0; | |
535 return 0; | |
536 } | |
537 | |
532
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538 static int SDL_FillRect1(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) |
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539 { |
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540 /* FIXME: We have to worry about packing order.. *sigh* */ |
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541 SDL_SetError("1-bpp rect fill not yet implemented"); |
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Return an error with color fills on less than 8 bpp surfaces.
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542 return -1; |
058d47b7a3b4
Return an error with color fills on less than 8 bpp surfaces.
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543 } |
058d47b7a3b4
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544 |
058d47b7a3b4
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545 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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546 { |
058d47b7a3b4
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547 /* FIXME: We have to worry about packing order.. *sigh* */ |
058d47b7a3b4
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548 SDL_SetError("4-bpp rect fill not yet implemented"); |
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549 return -1; |
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Return an error with color fills on less than 8 bpp surfaces.
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550 } |
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Return an error with color fills on less than 8 bpp surfaces.
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551 |
0 | 552 /* |
553 * This function performs a fast fill of the given rectangle with 'color' | |
554 */ | |
555 int SDL_FillRect(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color) | |
556 { | |
557 SDL_VideoDevice *video = current_video; | |
558 SDL_VideoDevice *this = current_video; | |
559 int x, y; | |
560 Uint8 *row; | |
561 | |
532
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562 /* This function doesn't work on surfaces < 8 bpp */ |
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563 if ( dst->format->BitsPerPixel < 8 ) { |
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564 switch(dst->format->BitsPerPixel) { |
058d47b7a3b4
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565 case 1: |
058d47b7a3b4
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|
566 return SDL_FillRect1(dst, dstrect, color); |
058d47b7a3b4
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567 break; |
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568 case 4: |
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569 return SDL_FillRect4(dst, dstrect, color); |
058d47b7a3b4
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570 break; |
058d47b7a3b4
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571 default: |
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572 SDL_SetError("Fill rect on unsupported surface format"); |
058d47b7a3b4
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573 return(-1); |
058d47b7a3b4
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574 break; |
058d47b7a3b4
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575 } |
058d47b7a3b4
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576 } |
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577 |
0 | 578 /* If 'dstrect' == NULL, then fill the whole surface */ |
579 if ( dstrect ) { | |
580 /* Perform clipping */ | |
581 if ( !SDL_IntersectRect(dstrect, &dst->clip_rect, dstrect) ) { | |
582 return(0); | |
583 } | |
584 } else { | |
585 dstrect = &dst->clip_rect; | |
586 } | |
587 | |
588 /* Check for hardware acceleration */ | |
589 if ( ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) && | |
590 video->info.blit_fill ) { | |
462
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591 SDL_Rect hw_rect; |
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592 if ( dst == SDL_VideoSurface ) { |
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593 hw_rect = *dstrect; |
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594 hw_rect.x += current_video->offset_x; |
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595 hw_rect.y += current_video->offset_y; |
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596 dstrect = &hw_rect; |
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597 } |
0 | 598 return(video->FillHWRect(this, dst, dstrect, color)); |
599 } | |
600 | |
601 /* Perform software fill */ | |
602 if ( SDL_LockSurface(dst) != 0 ) { | |
603 return(-1); | |
604 } | |
605 row = (Uint8 *)dst->pixels+dstrect->y*dst->pitch+ | |
606 dstrect->x*dst->format->BytesPerPixel; | |
607 if ( dst->format->palette || (color == 0) ) { | |
608 x = dstrect->w*dst->format->BytesPerPixel; | |
609 if ( !color && !((long)row&3) && !(x&3) && !(dst->pitch&3) ) { | |
610 int n = x >> 2; | |
611 for ( y=dstrect->h; y; --y ) { | |
612 SDL_memset4(row, 0, n); | |
613 row += dst->pitch; | |
614 } | |
615 } else { | |
616 #ifdef __powerpc__ | |
617 /* | |
1336
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618 * SDL_memset() on PPC (both glibc and codewarrior) uses |
0 | 619 * the dcbz (Data Cache Block Zero) instruction, which |
620 * causes an alignment exception if the destination is | |
621 * uncachable, so only use it on software surfaces | |
622 */ | |
623 if((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE) { | |
624 if(dstrect->w >= 8) { | |
625 /* | |
626 * 64-bit stores are probably most | |
627 * efficient to uncached video memory | |
628 */ | |
629 double fill; | |
1336
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630 SDL_memset(&fill, color, (sizeof fill)); |
0 | 631 for(y = dstrect->h; y; y--) { |
632 Uint8 *d = row; | |
633 unsigned n = x; | |
634 unsigned nn; | |
635 Uint8 c = color; | |
636 double f = fill; | |
637 while((unsigned long)d | |
638 & (sizeof(double) - 1)) { | |
639 *d++ = c; | |
640 n--; | |
641 } | |
642 nn = n / (sizeof(double) * 4); | |
643 while(nn) { | |
644 ((double *)d)[0] = f; | |
645 ((double *)d)[1] = f; | |
646 ((double *)d)[2] = f; | |
647 ((double *)d)[3] = f; | |
648 d += 4*sizeof(double); | |
649 nn--; | |
650 } | |
651 n &= ~(sizeof(double) * 4 - 1); | |
652 nn = n / sizeof(double); | |
653 while(nn) { | |
654 *(double *)d = f; | |
655 d += sizeof(double); | |
656 nn--; | |
657 } | |
658 n &= ~(sizeof(double) - 1); | |
659 while(n) { | |
660 *d++ = c; | |
661 n--; | |
662 } | |
663 row += dst->pitch; | |
664 } | |
665 } else { | |
666 /* narrow boxes */ | |
667 for(y = dstrect->h; y; y--) { | |
668 Uint8 *d = row; | |
669 Uint8 c = color; | |
670 int n = x; | |
671 while(n) { | |
672 *d++ = c; | |
673 n--; | |
674 } | |
675 row += dst->pitch; | |
676 } | |
677 } | |
678 } else | |
679 #endif /* __powerpc__ */ | |
680 { | |
681 for(y = dstrect->h; y; y--) { | |
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682 SDL_memset(row, color, x); |
0 | 683 row += dst->pitch; |
684 } | |
685 } | |
686 } | |
687 } else { | |
688 switch (dst->format->BytesPerPixel) { | |
689 case 2: | |
690 for ( y=dstrect->h; y; --y ) { | |
691 Uint16 *pixels = (Uint16 *)row; | |
692 Uint16 c = color; | |
693 Uint32 cc = (Uint32)c << 16 | c; | |
694 int n = dstrect->w; | |
695 if((unsigned long)pixels & 3) { | |
696 *pixels++ = c; | |
697 n--; | |
698 } | |
699 if(n >> 1) | |
700 SDL_memset4(pixels, cc, n >> 1); | |
701 if(n & 1) | |
702 pixels[n - 1] = c; | |
703 row += dst->pitch; | |
704 } | |
705 break; | |
706 | |
707 case 3: | |
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708 #if SDL_BYTEORDER == SDL_BIG_ENDIAN |
0 | 709 color <<= 8; |
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710 #endif |
0 | 711 for ( y=dstrect->h; y; --y ) { |
712 Uint8 *pixels = row; | |
713 for ( x=dstrect->w; x; --x ) { | |
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714 SDL_memcpy(pixels, &color, 3); |
0 | 715 pixels += 3; |
716 } | |
717 row += dst->pitch; | |
718 } | |
719 break; | |
720 | |
721 case 4: | |
722 for(y = dstrect->h; y; --y) { | |
723 SDL_memset4(row, color, dstrect->w); | |
724 row += dst->pitch; | |
725 } | |
726 break; | |
727 } | |
728 } | |
729 SDL_UnlockSurface(dst); | |
730 | |
731 /* We're done! */ | |
732 return(0); | |
733 } | |
734 | |
735 /* | |
736 * Lock a surface to directly access the pixels | |
737 */ | |
738 int SDL_LockSurface (SDL_Surface *surface) | |
739 { | |
740 if ( ! surface->locked ) { | |
741 /* Perform the lock */ | |
742 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
743 SDL_VideoDevice *video = current_video; | |
744 SDL_VideoDevice *this = current_video; | |
745 if ( video->LockHWSurface(this, surface) < 0 ) { | |
746 return(-1); | |
747 } | |
748 } | |
749 if ( surface->flags & SDL_RLEACCEL ) { | |
750 SDL_UnRLESurface(surface, 1); | |
751 surface->flags |= SDL_RLEACCEL; /* save accel'd state */ | |
752 } | |
753 /* This needs to be done here in case pixels changes value */ | |
754 surface->pixels = (Uint8 *)surface->pixels + surface->offset; | |
755 } | |
756 | |
757 /* Increment the surface lock count, for recursive locks */ | |
758 ++surface->locked; | |
759 | |
760 /* Ready to go.. */ | |
761 return(0); | |
762 } | |
763 /* | |
764 * Unlock a previously locked surface | |
765 */ | |
766 void SDL_UnlockSurface (SDL_Surface *surface) | |
767 { | |
768 /* Only perform an unlock if we are locked */ | |
769 if ( ! surface->locked || (--surface->locked > 0) ) { | |
770 return; | |
771 } | |
772 | |
773 /* Perform the unlock */ | |
774 surface->pixels = (Uint8 *)surface->pixels - surface->offset; | |
775 | |
776 /* Unlock hardware or accelerated surfaces */ | |
777 if ( surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT) ) { | |
778 SDL_VideoDevice *video = current_video; | |
779 SDL_VideoDevice *this = current_video; | |
780 video->UnlockHWSurface(this, surface); | |
781 } else { | |
782 /* Update RLE encoded surface with new data */ | |
783 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
784 surface->flags &= ~SDL_RLEACCEL; /* stop lying */ | |
785 SDL_RLESurface(surface); | |
786 } | |
787 } | |
788 } | |
789 | |
790 /* | |
791 * Convert a surface into the specified pixel format. | |
792 */ | |
793 SDL_Surface * SDL_ConvertSurface (SDL_Surface *surface, | |
794 SDL_PixelFormat *format, Uint32 flags) | |
795 { | |
796 SDL_Surface *convert; | |
797 Uint32 colorkey = 0; | |
798 Uint8 alpha = 0; | |
799 Uint32 surface_flags; | |
800 SDL_Rect bounds; | |
801 | |
802 /* Check for empty destination palette! (results in empty image) */ | |
803 if ( format->palette != NULL ) { | |
804 int i; | |
805 for ( i=0; i<format->palette->ncolors; ++i ) { | |
806 if ( (format->palette->colors[i].r != 0) || | |
807 (format->palette->colors[i].g != 0) || | |
808 (format->palette->colors[i].b != 0) ) | |
809 break; | |
810 } | |
811 if ( i == format->palette->ncolors ) { | |
812 SDL_SetError("Empty destination palette"); | |
813 return(NULL); | |
814 } | |
815 } | |
816 | |
264
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817 /* Only create hw surfaces with alpha channel if hw alpha blits |
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818 are supported */ |
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819 if(format->Amask != 0 && (flags & SDL_HWSURFACE)) { |
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820 const SDL_VideoInfo *vi = SDL_GetVideoInfo(); |
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821 if(!vi || !vi->blit_hw_A) |
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822 flags &= ~SDL_HWSURFACE; |
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823 } |
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824 |
0 | 825 /* Create a new surface with the desired format */ |
826 convert = SDL_CreateRGBSurface(flags, | |
827 surface->w, surface->h, format->BitsPerPixel, | |
828 format->Rmask, format->Gmask, format->Bmask, format->Amask); | |
829 if ( convert == NULL ) { | |
830 return(NULL); | |
831 } | |
832 | |
833 /* Copy the palette if any */ | |
834 if ( format->palette && convert->format->palette ) { | |
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835 SDL_memcpy(convert->format->palette->colors, |
0 | 836 format->palette->colors, |
837 format->palette->ncolors*sizeof(SDL_Color)); | |
838 convert->format->palette->ncolors = format->palette->ncolors; | |
839 } | |
840 | |
841 /* Save the original surface color key and alpha */ | |
842 surface_flags = surface->flags; | |
843 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
844 /* Convert colourkeyed surfaces to RGBA if requested */ | |
845 if((flags & SDL_SRCCOLORKEY) != SDL_SRCCOLORKEY | |
846 && format->Amask) { | |
847 surface_flags &= ~SDL_SRCCOLORKEY; | |
848 } else { | |
849 colorkey = surface->format->colorkey; | |
850 SDL_SetColorKey(surface, 0, 0); | |
851 } | |
852 } | |
853 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
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854 /* Copy over the alpha channel to RGBA if requested */ |
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855 if ( format->Amask ) { |
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856 surface->flags &= ~SDL_SRCALPHA; |
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857 } else { |
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858 alpha = surface->format->alpha; |
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Fixed SDL_DisplayFormatAlpha() on RGB surfaces with alpha
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859 SDL_SetAlpha(surface, 0, 0); |
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860 } |
0 | 861 } |
862 | |
863 /* Copy over the image data */ | |
864 bounds.x = 0; | |
865 bounds.y = 0; | |
866 bounds.w = surface->w; | |
867 bounds.h = surface->h; | |
868 SDL_LowerBlit(surface, &bounds, convert, &bounds); | |
869 | |
870 /* Clean up the original surface, and update converted surface */ | |
871 if ( convert != NULL ) { | |
872 SDL_SetClipRect(convert, &surface->clip_rect); | |
873 } | |
874 if ( (surface_flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { | |
875 Uint32 cflags = surface_flags&(SDL_SRCCOLORKEY|SDL_RLEACCELOK); | |
876 if ( convert != NULL ) { | |
877 Uint8 keyR, keyG, keyB; | |
878 | |
879 SDL_GetRGB(colorkey,surface->format,&keyR,&keyG,&keyB); | |
880 SDL_SetColorKey(convert, cflags|(flags&SDL_RLEACCELOK), | |
881 SDL_MapRGB(convert->format, keyR, keyG, keyB)); | |
882 } | |
883 SDL_SetColorKey(surface, cflags, colorkey); | |
884 } | |
885 if ( (surface_flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { | |
886 Uint32 aflags = surface_flags&(SDL_SRCALPHA|SDL_RLEACCELOK); | |
887 if ( convert != NULL ) { | |
888 SDL_SetAlpha(convert, aflags|(flags&SDL_RLEACCELOK), | |
889 alpha); | |
890 } | |
431
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891 if ( format->Amask ) { |
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892 surface->flags |= SDL_SRCALPHA; |
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893 } else { |
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894 SDL_SetAlpha(surface, aflags, alpha); |
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895 } |
0 | 896 } |
897 | |
898 /* We're ready to go! */ | |
899 return(convert); | |
900 } | |
901 | |
902 /* | |
903 * Free a surface created by the above function. | |
904 */ | |
905 void SDL_FreeSurface (SDL_Surface *surface) | |
906 { | |
907 /* Free anything that's not NULL, and not the screen surface */ | |
908 if ((surface == NULL) || | |
909 (current_video && | |
910 ((surface == SDL_ShadowSurface)||(surface == SDL_VideoSurface)))) { | |
911 return; | |
912 } | |
913 if ( --surface->refcount > 0 ) { | |
914 return; | |
915 } | |
915
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916 while ( surface->locked > 0 ) { |
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917 SDL_UnlockSurface(surface); |
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918 } |
0 | 919 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { |
920 SDL_UnRLESurface(surface, 0); | |
921 } | |
922 if ( surface->format ) { | |
923 SDL_FreeFormat(surface->format); | |
924 surface->format = NULL; | |
925 } | |
926 if ( surface->map != NULL ) { | |
927 SDL_FreeBlitMap(surface->map); | |
928 surface->map = NULL; | |
929 } | |
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930 if ( surface->hwdata ) { |
0 | 931 SDL_VideoDevice *video = current_video; |
932 SDL_VideoDevice *this = current_video; | |
933 video->FreeHWSurface(this, surface); | |
934 } | |
935 if ( surface->pixels && | |
936 ((surface->flags & SDL_PREALLOC) != SDL_PREALLOC) ) { | |
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937 SDL_free(surface->pixels); |
0 | 938 } |
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939 SDL_free(surface); |
0 | 940 #ifdef CHECK_LEAKS |
941 --surfaces_allocated; | |
942 #endif | |
943 } |