commit db2c2dd9b9a2d94c1ac8737cae1924314f11960a
author Enrico Galli <enrico.galli@intel.com> Tue Oct 06 08:12:29 2020 +0000
committer Commit Bot service account <commit-bot@chromium.org> Tue Oct 06 08:12:29 2020 +0000
tree f4240139368edfe56431e636a0be9cef22a20a35
parent 326e14f34bb57e6b31a207831f1944f5c0f4ba55

Add support for depthBias, depthBiasSlope, and depthBiasClamp

Bug: dawn:524
Change-Id: I2586aadbc326f58889314a2d10794bcc0572aaba
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/28300
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>

src/dawn_native/opengl/RenderPipelineGL.cpp

diff --git a/src/dawn_native/opengl/RenderPipelineGL.cpp b/src/dawn_native/opengl/RenderPipelineGL.cpp
index bc5882b..828f4cc 100644
--- a/src/dawn_native/opengl/RenderPipelineGL.cpp
+++ b/src/dawn_native/opengl/RenderPipelineGL.cpp
@@ -264,6 +264,19 @@
             gl.Disable(GL_SAMPLE_ALPHA_TO_COVERAGE);
         }
 
+        if (IsDepthBiasEnabled()) {
+            gl.Enable(GL_POLYGON_OFFSET_FILL);
+            float depthBias = GetDepthBias();
+            float slopeScale = GetDepthBiasSlopeScale();
+            if (gl.PolygonOffsetClamp != nullptr) {
+                gl.PolygonOffsetClamp(slopeScale, depthBias, GetDepthBiasClamp());
+            } else {
+                gl.PolygonOffset(slopeScale, depthBias);
+            }
+        } else {
+            gl.Disable(GL_POLYGON_OFFSET_FILL);
+        }
+
         for (ColorAttachmentIndex attachmentSlot : IterateBitSet(GetColorAttachmentsMask())) {
             ApplyColorState(gl, attachmentSlot, GetColorStateDescriptor(attachmentSlot));
         }