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Merge branch 'wip/smcv/bug6977' into 'main'

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scaling test: Fix intermittent failure with alpha = 0

Closes #6977

See merge request GNOME/gtk!7684
This commit is contained in:
Benjamin Otte 2024-09-03 15:27:20 +00:00
commit 7aeca0512c
1 changed files with 16 additions and 4 deletions
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20
testsuite/gsk/scaling.c
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@ -896,10 +896,22 @@ create_stipple_texture (GdkMemoryFormat format,
}
}
average->red /= average->alpha;
average->green /= average->alpha;
average->blue /= average->alpha;
average->alpha /= 4.0f;
if (average->alpha != 0.0f)
{
average->red /= average->alpha;
average->green /= average->alpha;
average->blue /= average->alpha;
average->alpha /= 4.0f;
}
else
{
/* Each component of the average has been multiplied by the alpha
* already, so if the alpha is zero, all components should also
* be zero */
g_assert_cmpfloat (average->red, ==, 0.0f);
g_assert_cmpfloat (average->green, ==, 0.0f);
g_assert_cmpfloat (average->blue, ==, 0.0f);
}
texture_builder_init (&builder, format, width, height);
for (y = 0; y < height; y++)