view docs/man3/SDL_GLattr.3 @ 4168:69bcba65c388 SDL-1.2

Fixed bug #526 Comment #1 From Simon Howard 2009-03-20 16:50:56 Hi, I'm the author of Chocolate Doom, one of the other source ports that James mentioned. This is a patch against the current SVN version of SDL 1.2 that fixes the bug. It has been tested and hopefully should be obviously correct from examining the changes. I'll give a brief explanation. When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED message is sent to the window. A WM_PALETTECHANGED message can also be received if the palette is changed for some other reason, like if the system palette is changed. Therefore, the palette change handler (DX5_PaletteChanged) has code to deal with this case. It distinguishes "expected" palette changes (set with SDL_SetPalette) from "unexpected" palette changes using the colorchange_expected variable, which is set before calling IDirectDrawPalette_SetEntries. However, the code to set this variable is missing in the fullscreen code path. By setting this variable, the palette change is handled properly and the freezes go away.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 13 Apr 2009 00:53:12 +0000
parents 4e3b250c950e
children 1238da4a7112
line wrap: on
line source

.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