commit b204e4c3d3458a24fca469baea3d667493ef1ccf
author Chris Dalton <csmartdalton@google.com> Thu Nov 07 12:43:13 2019 -0700
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Fri Nov 08 00:21:09 2019 +0000
tree ee8b4d4ee26d34e760aeb0ba0af9c8ce015baaaf
parent 52591f688023f061d2cf201b14a40d2b3a8128f7

Implement multisample "disable" in Vulkan

Emulates multisample disable by colocating all samples at pixel
center. Multisample disable will be required in order for us to
integrate mixed samples.

Change-Id: I52b67e22c979584b5d001e737a08eef07bd7ffe2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/253282
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>

src/gpu/GrPipeline.cpp

diff --git a/src/gpu/GrPipeline.cpp b/src/gpu/GrPipeline.cpp
index a246c85..c03a8dd 100644
--- a/src/gpu/GrPipeline.cpp
+++ b/src/gpu/GrPipeline.cpp
@@ -99,7 +99,15 @@
     }
 }
 
-uint32_t GrPipeline::getBlendInfoKey() const {
+void GrPipeline::genKey(GrProcessorKeyBuilder* b, const GrCaps& caps) const {
+    // kSnapVerticesToPixelCenters is implemented in a shader.
+    InputFlags ignoredFlags = InputFlags::kSnapVerticesToPixelCenters;
+    if (!caps.multisampleDisableSupport()) {
+        // Ganesh will omit kHWAntialias regardless multisampleDisableSupport.
+        ignoredFlags |= InputFlags::kHWAntialias;
+    }
+    b->add32((uint32_t)fFlags & ~(uint32_t)ignoredFlags);
+
     const GrXferProcessor::BlendInfo& blendInfo = this->getXferProcessor().getBlendInfo();
 
     static const uint32_t kBlendWriteShift = 1;
@@ -107,10 +115,10 @@
     GR_STATIC_ASSERT(kLast_GrBlendCoeff < (1 << kBlendCoeffShift));
     GR_STATIC_ASSERT(kFirstAdvancedGrBlendEquation - 1 < 4);
 
-    uint32_t key = blendInfo.fWriteColor;
-    key |= (blendInfo.fSrcBlend << kBlendWriteShift);
-    key |= (blendInfo.fDstBlend << (kBlendWriteShift + kBlendCoeffShift));
-    key |= (blendInfo.fEquation << (kBlendWriteShift + 2 * kBlendCoeffShift));
+    uint32_t blendKey = blendInfo.fWriteColor;
+    blendKey |= (blendInfo.fSrcBlend << kBlendWriteShift);
+    blendKey |= (blendInfo.fDstBlend << (kBlendWriteShift + kBlendCoeffShift));
+    blendKey |= (blendInfo.fEquation << (kBlendWriteShift + 2 * kBlendCoeffShift));
 
-    return key;
+    b->add32(blendKey);
 }