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| author | Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io> | 2020-06-08 12:16:14 +0200 |
|---|---|---|
| committer | Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io> | 2020-06-12 09:26:15 +0200 |
| commit | eb72d788fe9d6301e6254fd86d388783c4484873 (patch) | |
| tree | 68deb45173af3bc9c1c19bccdd87f5cd2ab3d95e /src/gui/rhi/qrhivulkan.cpp | |
| parent | 3f6142f5a1a01f201593f6711930ec77640dea46 (diff) | |
Add RHI feature check for screen space derivatives
Fragment shader functions like fwidth() are useful for antialiasing
distance field text in the case of perspective projections. In order
to enable this as an alternative code path, we need to detect support.
- OpenGL: Supported with GL_OES_standard_derivatives or GLES3 and up
- Direct 3D: Supported for ps_2_x, so always supported on Direct3D 11
- Vulkan/Metal: Always supported
Task-number: QTBUG-84695
Change-Id: I5e3fa8014c808a9a2d639305c5e90ec25d44655c
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Diffstat (limited to 'src/gui/rhi/qrhivulkan.cpp')
| -rw-r--r-- | src/gui/rhi/qrhivulkan.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/gui/rhi/qrhivulkan.cpp b/src/gui/rhi/qrhivulkan.cpp index 59898d3839..fdc80e1e80 100644 --- a/src/gui/rhi/qrhivulkan.cpp +++ b/src/gui/rhi/qrhivulkan.cpp @@ -4050,6 +4050,8 @@ bool QRhiVulkan::isFeatureSupported(QRhi::Feature feature) const return true; case QRhi::UIntAttributes: return true; + case QRhi::ScreenSpaceDerivatives: + return true; default: Q_UNREACHABLE(); return false; |