Mercurial > sdl-ios-xcode
annotate src/video/SDL_yuv.c @ 1258:b2283b0ded26
Date: Thu, 19 Jan 2006 20:02:29 +0200
From: Vassilis Virvilis <vasvir@iit.demokritos.gr>
Subject: [SDL] Request: Please reconsider adding tag in SDL_Event
Hi,
Patch in question:
--- include/SDL_events.h 20 Aug 2004 18:57:01 -0000 1.11
+++ include/SDL_events.h 19 Jan 2006 17:35:09 -0000
@@ -214,7 +214,7 @@
} SDL_SysWMEvent;
/* General event structure */
-typedef union {
+typedef union SDL_Event {
Uint8 type;
SDL_ActiveEvent active;
SDL_KeyboardEvent key;
Reasoning:
----------
1) Allows forward declaration of the SDL_Event union in C++. Please
note that in plain C it is possible to forward declare it.
2) Forward declaration is good because it allows encapsulation. It hides
the specific implementation and does not necessarily exposes SDL staff
to my appication's namespace
3) It can't harm plain C because tags are living in a different namespace
than typenames
4) It is already done like this in other places in SDL. Check for example
SDL_KeySym, and SDL_.*Event structures.
5) Right now I have to include SDL/event.h from a C++ header file. See 2)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 20 Jan 2006 13:07:25 +0000 |
| parents | b8d311d90021 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
769
b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
760
diff
changeset
|
3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* This is the implementation of the YUV video surface support */ | |
| 29 | |
| 30 #include <stdlib.h> | |
| 31 #include <string.h> | |
| 32 | |
| 33 #include "SDL_getenv.h" | |
| 34 #include "SDL_video.h" | |
|
660
73440ac574a2
You can't create a YUV overlay in OpenGL mode
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
35 #include "SDL_error.h" |
| 0 | 36 #include "SDL_sysvideo.h" |
| 37 #include "SDL_yuvfuncs.h" | |
| 38 #include "SDL_yuv_sw_c.h" | |
| 39 | |
| 40 | |
| 41 SDL_Overlay *SDL_CreateYUVOverlay(int w, int h, Uint32 format, | |
| 42 SDL_Surface *display) | |
| 43 { | |
| 44 SDL_VideoDevice *video = current_video; | |
| 45 SDL_VideoDevice *this = current_video; | |
| 46 const char *yuv_hwaccel; | |
| 47 SDL_Overlay *overlay; | |
| 48 | |
|
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
|
49 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
|
50 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
|
51 return NULL; |
|
73440ac574a2
You can't create a YUV overlay in OpenGL mode
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
52 } |
| 0 | 53 |
| 54 /* Display directly on video surface, if possible */ | |
|
81
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
55 if ( getenv("SDL_VIDEO_YUV_DIRECT") ) { |
|
1a2723474f12
Added the SDL_VIDEO_YUV_DIRECT hack for better performance when the
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
56 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
|
57 ((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
|
58 (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
|
59 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
|
60 } |
| 0 | 61 } |
|
660
73440ac574a2
You can't create a YUV overlay in OpenGL mode
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
62 overlay = NULL; |
| 0 | 63 yuv_hwaccel = getenv("SDL_VIDEO_YUV_HWACCEL"); |
| 64 if ( ((display == SDL_VideoSurface) && video->CreateYUVOverlay) && | |
| 65 (!yuv_hwaccel || (atoi(yuv_hwaccel) > 0)) ) { | |
| 66 overlay = video->CreateYUVOverlay(this, w, h, format, display); | |
| 67 } | |
| 68 /* If hardware YUV overlay failed ... */ | |
| 69 if ( overlay == NULL ) { | |
| 70 overlay = SDL_CreateYUV_SW(this, w, h, format, display); | |
| 71 } | |
| 72 return overlay; | |
| 73 } | |
| 74 | |
| 75 int SDL_LockYUVOverlay(SDL_Overlay *overlay) | |
| 76 { | |
| 77 return overlay->hwfuncs->Lock(current_video, overlay); | |
| 78 } | |
| 79 | |
| 80 void SDL_UnlockYUVOverlay(SDL_Overlay *overlay) | |
| 81 { | |
| 82 overlay->hwfuncs->Unlock(current_video, overlay); | |
| 83 } | |
| 84 | |
| 85 int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect) | |
| 86 { | |
| 87 return overlay->hwfuncs->Display(current_video, overlay, dstrect); | |
| 88 } | |
| 89 | |
| 90 void SDL_FreeYUVOverlay(SDL_Overlay *overlay) | |
| 91 { | |
| 92 if ( overlay ) { | |
| 93 if ( overlay->hwfuncs ) { | |
| 94 overlay->hwfuncs->FreeHW(current_video, overlay); | |
| 95 } | |
| 96 free(overlay); | |
| 97 } | |
| 98 } |