Mercurial > sdl-ios-xcode
annotate src/video/SDL_yuv.c @ 4179:d7294b7c732d SDL-1.2
Date: Fri, 24 Apr 2009 17:47:07 +0200
From: Stefan Klug
Subject: Re: [SDL] SVN doesn't compile for wince
the patch applied for Revision 4483 was seemingly not checked for side
effects.
It broke the WinCE build.
The attached patch should fix these problems. I'm not using SDL 1.2 on
CE anymore, and therefore haven't tested the patch... but at least it
compiles ;-)
Regards Stefan
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 07 May 2009 12:40:16 +0000 |
| parents | a1b03ba2fcd0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 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 */ |
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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 | |
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40 if ( (display->flags & SDL_OPENGL) == SDL_OPENGL ) { |
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41 SDL_SetError("YUV overlays are not supported in OpenGL mode"); |
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42 return NULL; |
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43 } |
| 0 | 44 |
| 45 /* Display directly on video surface, if possible */ | |
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46 if ( SDL_getenv("SDL_VIDEO_YUV_DIRECT") ) { |
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47 if ( (display == SDL_PublicSurface) && |
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48 ((SDL_VideoSurface->format->BytesPerPixel == 2) || |
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49 (SDL_VideoSurface->format->BytesPerPixel == 4)) ) { |
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50 display = SDL_VideoSurface; |
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51 } |
| 0 | 52 } |
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53 overlay = NULL; |
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54 yuv_hwaccel = SDL_getenv("SDL_VIDEO_YUV_HWACCEL"); |
| 0 | 55 if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) && |
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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 { | |
| 4076 | 68 if ( overlay == NULL ) { |
| 69 SDL_SetError("Passed NULL overlay"); | |
| 70 return -1; | |
| 71 } | |
| 0 | 72 return overlay->hwfuncs->Lock(current_video, overlay); |
| 73 } | |
| 74 | |
| 75 void SDL_UnlockYUVOverlay(SDL_Overlay *overlay) | |
| 76 { | |
| 4076 | 77 if ( overlay == NULL ) { |
| 78 return; | |
| 79 } | |
| 0 | 80 overlay->hwfuncs->Unlock(current_video, overlay); |
| 81 } | |
| 82 | |
| 83 int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect) | |
| 84 { | |
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85 SDL_Rect src, dst; |
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86 int srcx, srcy, srcw, srch; |
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87 int dstx, dsty, dstw, dsth; |
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88 |
| 4076 | 89 if ( overlay == NULL || dstrect == NULL ) { |
| 90 SDL_SetError("Passed NULL overlay or dstrect"); | |
| 91 return -1; | |
| 92 } | |
| 93 | |
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94 /* Clip the rectangle to the screen area */ |
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95 srcx = 0; |
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96 srcy = 0; |
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97 srcw = overlay->w; |
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98 srch = overlay->h; |
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99 dstx = dstrect->x; |
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100 dsty = dstrect->y; |
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101 dstw = dstrect->w; |
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102 dsth = dstrect->h; |
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103 if ( dstx < 0 ) { |
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104 srcw += (dstx * overlay->w) / dstrect->w; |
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105 dstw += dstx; |
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106 srcx -= (dstx * overlay->w) / dstrect->w; |
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107 dstx = 0; |
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108 } |
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109 if ( (dstx+dstw) > current_video->screen->w ) { |
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110 int extra = (dstx+dstw - current_video->screen->w); |
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111 srcw -= (extra * overlay->w) / dstrect->w; |
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112 dstw -= extra; |
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113 } |
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114 if ( dsty < 0 ) { |
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115 srch += (dsty * overlay->h) / dstrect->h; |
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116 dsth += dsty; |
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117 srcy -= (dsty * overlay->h) / dstrect->h; |
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118 dsty = 0; |
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119 } |
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120 if ( (dsty+dsth) > current_video->screen->h ) { |
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121 int extra = (dsty+dsth - current_video->screen->h); |
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122 srch -= (extra * overlay->h) / dstrect->h; |
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123 dsth -= extra; |
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124 } |
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125 if ( srcw <= 0 || srch <= 0 || |
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126 srch <= 0 || dsth <= 0 ) { |
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127 return 0; |
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128 } |
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129 /* Ugh, I can't wait for SDL_Rect to be int values */ |
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130 src.x = srcx; |
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131 src.y = srcy; |
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132 src.w = srcw; |
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133 src.h = srch; |
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134 dst.x = dstx; |
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135 dst.y = dsty; |
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136 dst.w = dstw; |
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137 dst.h = dsth; |
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138 return overlay->hwfuncs->Display(current_video, overlay, &src, &dst); |
| 0 | 139 } |
| 140 | |
| 141 void SDL_FreeYUVOverlay(SDL_Overlay *overlay) | |
| 142 { | |
| 4076 | 143 if ( overlay == NULL ) { |
| 144 return; | |
| 0 | 145 } |
| 4076 | 146 if ( overlay->hwfuncs ) { |
| 147 overlay->hwfuncs->FreeHW(current_video, overlay); | |
| 148 } | |
| 149 SDL_free(overlay); | |
| 0 | 150 } |