Mercurial > sdl-ios-xcode
view docs/man3/SDL_GLattr.3 @ 3335:b8d313de8a65
Adam Strzelecki to SDL
Since current DirectFB implementation is incomplete for YUV surfaces (actually causes segmentation faults when trying Lock and use YUV planar textures) I decided to fix it a bit.
Here's a patch that should make DirectFB properly support YUV both packed and planar (3 planes).
(1) Removed SDL_BYTESPERPIXEL at all in favor of DFB_BYTES_PER_PIXEL(SDLToDFBPixelFormat(fmt)) which does return always proper BPP for YUVs too, coz SDL_BYTESPERPIXEL returns incorrect values for FOURCCs
(2) Fixed data->pixels allocation for planar YUVs in CreateTexture, it should allocate 150% more space
(3) Copy other planes for planar YUVs in UpdateTexture
(4) Moved checking if format is supported at all with DirectFB on CreateTexture at the beginning of the code
Waiting for comments,
--
Adam Strzelecki | nanoant.com
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 04 Oct 2009 04:03:37 +0000 |
| parents | 546f7c1eb755 |
| children | 1238da4a7112 |
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.TH "SDL_GLattr" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME" SDL_GLattr \- SDL GL Attributes .SH "ATTRIBUTES" .TP 20 \fBSDL_GL_RED_SIZE\fP Size of the framebuffer red component, in bits .TP 20 \fBSDL_GL_GREEN_SIZE\fP Size of the framebuffer green component, in bits .TP 20 \fBSDL_GL_BLUE_SIZE\fP Size of the framebuffer blue component, in bits .TP 20 \fBSDL_GL_ALPHA_SIZE\fP Size of the framebuffer alpha component, in bits .TP 20 \fBSDL_GL_DOUBLEBUFFER\fP 0 or 1, enable or disable double buffering .TP 20 \fBSDL_GL_BUFFER_SIZE\fP Size of the framebuffer, in bits .TP 20 \fBSDL_GL_DEPTH_SIZE\fP Size of the depth buffer, in bits .TP 20 \fBSDL_GL_STENCIL_SIZE\fP Size of the stencil buffer, in bits .TP 20 \fBSDL_GL_ACCUM_RED_SIZE\fP Size of the accumulation buffer red component, in bits .TP 20 \fBSDL_GL_ACCUM_GREEN_SIZE\fP Size of the accumulation buffer green component, in bits .TP 20 \fBSDL_GL_ACCUM_BLUE_SIZE\fP Size of the accumulation buffer blue component, in bits .TP 20 \fBSDL_GL_ACCUM_ALPHA_SIZE\fP Size of the accumulation buffer alpha component, in bits .SH "DESCRIPTION" .PP While you can set most OpenGL attributes normally, the attributes list above must be known \fIbefore\fP SDL sets the video mode\&. These attributes a set and read with \fI\fBSDL_GL_SetAttribute\fP\fR and \fI\fBSDL_GL_GetAttribute\fP\fR\&. .SH "SEE ALSO" .PP \fI\fBSDL_GL_SetAttribute\fP\fR, \fI\fBSDL_GL_GetAttribute\fP\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01