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SDL_RenderReadPixels() needs to flush asynchronous operations before it reads. The semantics are that it reads the back buffer, and those pixels may not be available once SDL_RenderPresent() has happened.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 21 Nov 2009 05:05:19 +0000
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