From: "Alex Volkov" Date: Thu, 10 Nov 2005 21:53:40 -0500 Subject: [SDL] BUG[?]: 32bpp RGBA->RGB colorkey blit, no SDL_SRCALPHA It seems there is either a documentation vs. reality mismatch or a real bug in SDL_blit_N.c:BlitNtoNKey(). The exact blit in question is a 32bpp RGBA->RGB, where RGBA has SDL_COLORKEY and *no* SDL_SRCALPHA flags. The doc in SDL_video.h states: * RGBA->RGB: * SDL_SRCALPHA not set: * copy RGB. * if SDL_SRCCOLORKEY set, only copy the pixels matching the * RGB values of the source colour key, ignoring alpha in the * comparison. BlitNtoNKey(), however, forgets to "ignore alpha in the comparison". The documentation makes perfect sense, so I think it is the code that is faulty. The attached patch corrects the code.

.TH "SDL_GL_LoadLibrary" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_GL_LoadLibrary\- Specify an OpenGL library
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBint \fBSDL_GL_LoadLibrary\fP\fR(\fBconst char *path\fR);
.SH "DESCRIPTION"
.PP
If you wish, you may load the OpenGL library at runtime, this must be done before \fI\fBSDL_SetVideoMode\fP\fR is called\&. The \fBpath\fR of the GL library is passed to \fBSDL_GL_LoadLibrary\fP and it returns \fB0\fR on success, or \fB-1\fR on an error\&. You must then use \fI\fBSDL_GL_GetProcAddress\fP\fR to retrieve function pointers to GL functions\&.
.SH "SEE ALSO"
.PP
\fI\fBSDL_GL_GetProcAddress\fP\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01