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This will be useful to craft tests to ensure renderers are properly producing straight alpha framebuffers when required. Producing straight alpha framebuffers require in-shader blending. But not every device has support for that. So enabling the config option added in "frontend: add output-straight-alpha config option" makes GL renderer to fail creating outputs on unsupported devices. Running the test suite locally shouldn't fail just because underlying hardware does not support in-shader blending. To avoid that, we add WESTON_CAP_SHADER_BLENDING. Tests can then config test_quirks.required_capabilities, and will get skipped when the compositor does not support the cap. Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com> |
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