Mercurial > sdl-ios-xcode
view test/testver.c @ 1543:98f9b16f565c
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.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Wed, 15 Mar 2006 15:43:15 +0000 |
parents | d93862a3d821 |
children | 782fd950bd46 c121d94672cb |
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/* Test program to compare the compile-time version of SDL with the linked version of SDL */ #include <stdio.h> #include <stdlib.h> #include "SDL.h" int main(int argc, char *argv[]) { SDL_version compiled; /* Initialize SDL */ if ( SDL_Init(0) < 0 ) { fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); exit(1); } #ifdef DEBUG fprintf(stderr, "SDL initialized\n"); #endif #if SDL_VERSION_ATLEAST(1, 2, 0) printf("Compiled with SDL 1.2 or newer\n"); #else printf("Compiled with SDL older than 1.2\n"); #endif SDL_VERSION(&compiled); printf("Compiled version: %d.%d.%d\n", compiled.major, compiled.minor, compiled.patch); printf("Linked version: %d.%d.%d\n", SDL_Linked_Version()->major, SDL_Linked_Version()->minor, SDL_Linked_Version()->patch); SDL_Quit(); return(0); }