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.

aclocal.m4
autom4te*
config.cache
config.log
config.status
configure
Makefile
SDL.dll
stdout.txt
stderr.txt
checkkeys
graywin
loopwave
testalpha
testbitmap
testblitspeed
testcdrom
testdyngl
testerror
testfile
testgamma
testgl
testhread
testiconv
testjoystick
testkeys
testlock
testoverlay
testoverlay2
testpalette
testplatform
testsem
testsprite
testtimer
testver
testvidinfo
testwin
testwm
threadwin
torturethread