Mercurial > sdl-ios-xcode
annotate src/video/SDL_yuv.c @ 1643:51038e80ae59
More general fix for bug #189
The clipping is done at a higher level, and the low level functions are
passed clipped rectangles. Drivers which don't support source clipping
have not been changed, so the image will be squished instead of clipped,
but at least they will no longer crash when the destination rect was out
of bounds.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 17 Apr 2006 06:47:23 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 9a7c62bbc8b3 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
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 | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
81
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
|
1402
d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
1358
diff
changeset
|
22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* This is the implementation of the YUV video surface support */ | |
| 25 | |
| 26 #include "SDL_video.h" | |
| 27 #include "SDL_sysvideo.h" | |
| 28 #include "SDL_yuvfuncs.h" | |
| 29 #include "SDL_yuv_sw_c.h" | |
| 30 | |
| 31 | |
| 32 SDL_Overlay *SDL_CreateYUVOverlay(int w, int h, Uint32 format, | |
| 33 SDL_Surface *display) | |
| 34 { | |
| 35 SDL_VideoDevice *video = current_video; | |
| 36 SDL_VideoDevice *this = current_video; | |
| 37 const char *yuv_hwaccel; | |
| 38 SDL_Overlay *overlay; | |
| 39 | |
|
760
cf9dd3aa6756
Oops, we only want to fail creation if the display surface is an OpenGL surface.
Sam Lantinga <slouken@libsdl.org>
parents:
660
diff
changeset
|
40 if ( (display->flags & SDL_OPENGL) == SDL_OPENGL ) { |
|
660
73440ac574a2
You can't create a YUV overlay in OpenGL mode
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
41 SDL_SetError("YUV overlays are not supported in OpenGL mode"); |
|
73440ac574a2
You can't create a YUV overlay in OpenGL mode
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
42 return NULL; |
|
73440ac574a2
You can't create a YUV overlay in OpenGL mode
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
43 } |
| 0 | 44 |
| 45 /* Display directly on video surface, if possible */ | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
46 if ( SDL_getenv("SDL_VIDEO_YUV_DIRECT") ) { |
|
81
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
47 if ( (display == SDL_PublicSurface) && |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
48 ((SDL_VideoSurface->format->BytesPerPixel == 2) || |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
49 (SDL_VideoSurface->format->BytesPerPixel == 4)) ) { |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
50 display = SDL_VideoSurface; |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
51 } |
| 0 | 52 } |
|
660
73440ac574a2
You can't create a YUV overlay in OpenGL mode
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
53 overlay = NULL; |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
54 yuv_hwaccel = SDL_getenv("SDL_VIDEO_YUV_HWACCEL"); |
| 0 | 55 if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) && |
|
1341
d02b552e5304
Configure dynamically generates SDL_config.h
Sam Lantinga <slouken@libsdl.org>
parents:
1338
diff
changeset
|
56 (!yuv_hwaccel || (SDL_atoi(yuv_hwaccel) > 0)) ) { |
| 0 | 57 overlay = video->CreateYUVOverlay(this, w, h, format, display); |
| 58 } | |
| 59 /* If hardware YUV overlay failed ... */ | |
| 60 if ( overlay == NULL ) { | |
| 61 overlay = SDL_CreateYUV_SW(this, w, h, format, display); | |
| 62 } | |
| 63 return overlay; | |
| 64 } | |
| 65 | |
| 66 int SDL_LockYUVOverlay(SDL_Overlay *overlay) | |
| 67 { | |
| 68 return overlay->hwfuncs->Lock(current_video, overlay); | |
| 69 } | |
| 70 | |
| 71 void SDL_UnlockYUVOverlay(SDL_Overlay *overlay) | |
| 72 { | |
| 73 overlay->hwfuncs->Unlock(current_video, overlay); | |
| 74 } | |
| 75 | |
| 76 int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect) | |
| 77 { | |
|
1643
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
78 SDL_Rect src, dst; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
79 int srcx, srcy, srcw, srch; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
80 int dstx, dsty, dstw, dsth; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
81 |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
82 /* Clip the rectangle to the screen area */ |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
83 srcx = 0; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
84 srcy = 0; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
85 srcw = overlay->w; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
86 srch = overlay->h; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
87 dstx = dstrect->x; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
88 dsty = dstrect->y; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
89 dstw = dstrect->w; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
90 dsth = dstrect->h; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
91 if ( dstx < 0 ) { |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
92 srcw += (dstx * overlay->w) / dstrect->w; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
93 dstw += dstx; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
94 srcx -= (dstx * overlay->w) / dstrect->w; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
95 dstx = 0; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
96 } |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
97 if ( (dstx+dstw) > current_video->screen->w ) { |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
98 int extra = (dstx+dstw - current_video->screen->w); |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
99 srcw -= (extra * overlay->w) / dstrect->w; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
100 dstw -= extra; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
101 } |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
102 if ( dsty < 0 ) { |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
103 srch += (dsty * overlay->h) / dstrect->h; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
104 dsth += dsty; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
105 srcy -= (dsty * overlay->h) / dstrect->h; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
106 dsty = 0; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
107 } |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
108 if ( (dsty+dsth) > current_video->screen->h ) { |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
109 int extra = (dsty+dsth - current_video->screen->h); |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
110 srch -= (extra * overlay->h) / dstrect->h; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
111 dsth -= extra; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
112 } |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
113 if ( srcw <= 0 || srch <= 0 || |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
114 srch <= 0 || dsth <= 0 ) { |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
115 return 0; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
116 } |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
117 /* Ugh, I can't wait for SDL_Rect to be int values */ |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
118 src.x = srcx; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
119 src.y = srcy; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
120 src.w = srcw; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
121 src.h = srch; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
122 dst.x = dstx; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
123 dst.y = dsty; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
124 dst.w = dstw; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
125 dst.h = dsth; |
|
51038e80ae59
More general fix for bug #189
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
126 return overlay->hwfuncs->Display(current_video, overlay, &src, &dst); |
| 0 | 127 } |
| 128 | |
| 129 void SDL_FreeYUVOverlay(SDL_Overlay *overlay) | |
| 130 { | |
| 131 if ( overlay ) { | |
| 132 if ( overlay->hwfuncs ) { | |
| 133 overlay->hwfuncs->FreeHW(current_video, overlay); | |
| 134 } | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
135 SDL_free(overlay); |
| 0 | 136 } |
| 137 } |