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testautomation: don't validate alpha values on XRGB formats 

The results are not defined, and some renderers set 0xFF always and other renderers set the alpha to blend results, even though it won't be used when rendering.

Fixes --filter render_testBlendModes with D3D renderers
This commit is contained in:
Sam Lantinga 2025-01-20 11:29:41 -08:00
parent c698c61f03
commit 759e01bd64
1 changed files with 6 additions and 1 deletions
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7
test/testautomation_render.c
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@ -897,7 +897,12 @@ static void testBlendModeOperation(TestRenderOperation op, int mode, SDL_PixelFo
deltaR = SDL_abs((int)actualR - expectedR);
deltaG = SDL_abs((int)actualG - expectedG);
deltaB = SDL_abs((int)actualB - expectedB);
deltaA = SDL_abs((int)actualA - expectedA);
if (SDL_ISPIXELFORMAT_ALPHA(dst_format)) {
deltaA = SDL_abs((int)actualA - expectedA);
} else {
// The alpha channel is ignored in non-alpha formats, so don't validate it
deltaA = 0;
}
SDLTest_AssertCheck(
deltaR <= MAXIMUM_ERROR &&
deltaG <= MAXIMUM_ERROR &&