/**
* @brief Compares screen pixels with image pixels. Helper function.
*
* @param s Image to compare against.
*
* \sa
* http://wiki.libsdl.org/moin.cgi/SDL_RenderReadPixels
* http://wiki.libsdl.org/moin.cgi/SDL_CreateRGBSurfaceFrom
* http://wiki.libsdl.org/moin.cgi/SDL_FreeSurface
*/
static void
_compare(SDL_Surface *referenceSurface, int allowable_error)
{
int result;
SDL_Rect rect;
Uint8 *pixels;
SDL_Surface *testSurface;
/* Read pixels. */
pixels = (Uint8 *)SDL_malloc(4*TESTRENDER_SCREEN_W*TESTRENDER_SCREEN_H);
SDLTest_AssertCheck(pixels != NULL, "Validate allocated temp pixel buffer");
if (pixels == NULL) return;
/* Explicitly specify the rect in case the window isn't the expected size... */
rect.x = 0;
rect.y = 0;
rect.w = TESTRENDER_SCREEN_W;
rect.h = TESTRENDER_SCREEN_H;
result = SDL_RenderReadPixels(renderer, &rect, RENDER_COMPARE_FORMAT, pixels, 80*4 );
SDLTest_AssertCheck(result == 0, "Validate result from SDL_RenderReadPixels, expected: 0, got: %i", result);
/* Create surface. */
testSurface = SDL_CreateRGBSurfaceFrom(pixels, TESTRENDER_SCREEN_W, TESTRENDER_SCREEN_H, 32, TESTRENDER_SCREEN_W*4,
RENDER_COMPARE_RMASK, RENDER_COMPARE_GMASK, RENDER_COMPARE_BMASK, RENDER_COMPARE_AMASK);
SDLTest_AssertCheck(testSurface != NULL, "Verify result from SDL_CreateRGBSurfaceFrom is not NULL");
/* Compare surface. */
result = SDLTest_CompareSurfaces( testSurface, referenceSurface, allowable_error );
SDLTest_AssertCheck(result == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", result);
/* Clean up. */
SDL_free(pixels);
SDL_FreeSurface(testSurface);
}
/* !
* Tests surface conversion.
*/
int
surface_testSurfaceConversion(void *arg)
{
SDL_Surface *rface = NULL, *face = NULL;
int ret = 0;
/* Create sample surface */
face = SDLTest_ImageFace();
SDLTest_AssertCheck(face != NULL, "Verify face surface is not NULL");
if (face == NULL)
return TEST_ABORTED;
/* Set transparent pixel as the pixel at (0,0) */
if (face->format->palette) {
ret = SDL_SetColorKey(face, SDL_RLEACCEL, *(Uint8 *) face->pixels);
SDLTest_AssertPass("Call to SDL_SetColorKey()");
SDLTest_AssertCheck(ret == 0, "Verify result from SDL_SetColorKey, expected: 0, got: %i", ret);
}
/* Convert to 32 bit to compare. */
rface = SDL_ConvertSurface( face, testSurface->format, 0 );
SDLTest_AssertPass("Call to SDL_ConvertSurface()");
SDLTest_AssertCheck(rface != NULL, "Verify result from SDL_ConvertSurface is not NULL");
/* Compare surface. */
ret = SDLTest_CompareSurfaces( rface, face, 0 );
SDLTest_AssertCheck(ret == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", ret);
/* Clean up. */
if (face != NULL) {
SDL_FreeSurface( face );
face = NULL;
}
if (rface != NULL) {
SDL_FreeSurface( rface );
rface = NULL;
}
return TEST_COMPLETED;
}
