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Document that the pitch value may be zero for surfaces that will be filled in by the application later.

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Also verify that the pitch isn't zero for surfaces with valid pixels

Fixes https://github.com/libsdl-org/SDL/issues/7143
This commit is contained in:
Sam Lantinga
2023-01-24 22:49:33 -08:00
parent e3bada6fbd
commit d496d187c5
3 changed files with 28 additions and 12 deletions
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8
test/testautomation_surface.c
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@@ -621,6 +621,14 @@ int surface_testOverflow(void *arg)
SDLTest_AssertCheck(surface == NULL, "Should detect negative pitch");
SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
"Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
surface = SDL_CreateSurfaceFrom(buf, 1, 1, 0, SDL_PIXELFORMAT_RGBA8888);
SDLTest_AssertCheck(surface == NULL, "Should detect zero pitch");
SDLTest_AssertCheck(SDL_strcmp(SDL_GetError(), expectedError) == 0,
"Expected \"%s\", got \"%s\"", expectedError, SDL_GetError());
surface = SDL_CreateSurfaceFrom(NULL, 1, 1, 0, SDL_PIXELFORMAT_RGBA8888);
SDLTest_AssertCheck(surface != NULL, "Allow zero pitch for partially set up surfaces: %s",
surface != NULL ? "(success)" : SDL_GetError());
SDL_DestroySurface(surface);
/* Less than 1 byte per pixel: the pitch can legitimately be less than
* the width, but it must be enough to hold the appropriate number of