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Florian Forster to sdl in SDL 1.3 (revision 5508 from SVN), the method used to calculate the bits per pixel from a “int format” differ between “SDL_ListModes” (which always uses the “SDL_BITSPERPIXEL” macro) and “SDL_PixelFormatEnumTo- Masks” (which uses either “SDL_BITSPERPIXEL” or “SDL_BYTESPERPIXEL * 8”, depending on the value of “SDL_BYTESPERPIXEL”). Because the values are later compared in “SDL_ListModes” this may lead to some valid video modes not being returned. In my case the only mode returned by “SDL_GetNumDisplayModes” was dismissed and NULL was returned. (This led to the calling application sticking its head in the sand.) The attached patch copies the method used within “SDL_PixelFormatEnumTo- Masks” to “SDL_ListModes”. This solved the problem for me though I don't fully understand the method used by “SDL_PixelFormatEnumToMasks”.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 19 Jan 2011 16:06:47 -0800
parents 94dd49f6b005
children e8916fe9cfc8
line wrap: on
line source


/* Definitions for platform dependent windowing functions to test SDL
   integration with native windows
*/

#include "SDL.h"

/* This header includes all the necessary system headers for native windows */
#include "SDL_syswm.h"

typedef struct
{
    const char *tag;
    void *(*CreateNativeWindow) (int w, int h);
    void (*DestroyNativeWindow) (void *window);
} NativeWindowFactory;

#ifdef SDL_VIDEO_DRIVER_WIN32
#define TEST_NATIVE_WIN32
extern NativeWindowFactory Win32WindowFactory;
#endif

#ifdef SDL_VIDEO_DRIVER_X11
#define TEST_NATIVE_X11
extern NativeWindowFactory X11WindowFactory;
#endif

#ifdef SDL_VIDEO_DRIVER_COCOA
/* Actually, we don't really do this, since it involves adding Objective C
   support to the build system, which is a little tricky.  You can uncomment
   it manually though and link testnativecocoa.m into the test application.
*/
#if 1
#define TEST_NATIVE_COCOA
extern NativeWindowFactory CocoaWindowFactory;
#endif
#endif