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render: an empty clip rect should clip all drawing

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Added a test to validate this and fixed the Metal renderer

Fixes https://github.com/libsdl-org/SDL/issues/15434
This commit is contained in:
Sam Lantinga
2026-05-29 13:44:46 -07:00
parent ed2c8036a7
commit e04bfb4c6e
2 changed files with 22 additions and 8 deletions
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14
test/testautomation_render.c
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@@ -1361,6 +1361,20 @@ static int SDLCALL render_testClipRect(void *arg)
/* Check to see if final image matches. */
compare(referenceSurface, ALLOWABLE_ERROR_OPAQUE);
/*
* Verify that empty cliprect clips all drawing
*/
/* Set the cliprect and do a fill operation */
cliprect.h = 0;
CHECK_FUNC(SDL_SetRenderClipRect, (renderer, &cliprect))
CHECK_FUNC(SDL_SetRenderDrawColor, (renderer, 255, 0, 0, SDL_ALPHA_OPAQUE))
CHECK_FUNC(SDL_RenderFillRect, (renderer, NULL))
CHECK_FUNC(SDL_SetRenderClipRect, (renderer, NULL))
/* Check to see if final image matches. */
compare(referenceSurface, ALLOWABLE_ERROR_OPAQUE);
/*
* Verify that clear ignores the cliprect
*/