CCPR: Blacklist Mali GPUs and Vulkan while we work through issues

Bug: skia:
Change-Id: I59dfb1c839a66a6aa6c954e4a544930fc1376a22
Reviewed-on: https://skia-review.googlesource.com/53560
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>

include/gpu/GrCaps.h

@@ -74,6 +74,8 @@ public:
 
     bool avoidInstancedDrawsToFPTargets() const { return fAvoidInstancedDrawsToFPTargets; }
 
+    bool blacklistCoverageCounting() const { return fBlacklistCoverageCounting; }
+
     bool avoidStencilBuffers() const { return fAvoidStencilBuffers; }
 
     /**
@@ -210,6 +212,7 @@ protected:
     // Driver workaround
     bool fUseDrawInsteadOfClear                      : 1;
     bool fAvoidInstancedDrawsToFPTargets             : 1;
+    bool fBlacklistCoverageCounting                  : 1;
     bool fAvoidStencilBuffers                        : 1;
 
     // ANGLE workaround

src/gpu/GrCaps.cpp

@@ -79,6 +79,7 @@ GrCaps::GrCaps(const GrContextOptions& options) {
 #endif
     fBufferMapThreshold = options.fBufferMapThreshold;
     fAvoidInstancedDrawsToFPTargets = false;
+    fBlacklistCoverageCounting = false;
     fAvoidStencilBuffers = false;
 
     fPreferVRAMUseOverFlushes = true;

src/gpu/ccpr/GrCoverageCountingPathRenderer.cpp

@@ -31,7 +31,8 @@ bool GrCoverageCountingPathRenderer::IsSupported(const GrCaps& caps) {
            shaderCaps.maxVertexSamplers() >= 1 &&
            caps.instanceAttribSupport() &&
            caps.isConfigTexturable(kAlpha_half_GrPixelConfig) &&
-           caps.isConfigRenderable(kAlpha_half_GrPixelConfig, /*withMSAA=*/false);
+           caps.isConfigRenderable(kAlpha_half_GrPixelConfig, /*withMSAA=*/false) &&
+           !caps.blacklistCoverageCounting();
 }
 
 sk_sp<GrCoverageCountingPathRenderer>

src/gpu/gl/GrGLCaps.cpp

@@ -388,6 +388,11 @@ void GrGLCaps::init(const GrContextOptions& contextOptions,
         fPreferClientSideDynamicBuffers = true;
     }
 
+    // Mali GPUs have serious issues with CCPR. Blacklisting until we can look into workarounds.
+    if (kARM_GrGLVendor == ctxInfo.vendor()) {
+        fBlacklistCoverageCounting = true;
+    }
+
     if (!contextOptions.fAvoidStencilBuffers) {
         // To reduce surface area, if we avoid stencil buffers, we also disable MSAA.
         this->initFSAASupport(contextOptions, ctxInfo, gli);

src/gpu/vk/GrVkCaps.cpp

@@ -36,6 +36,7 @@ GrVkCaps::GrVkCaps(const GrContextOptions& contextOptions, const GrVkInterface*
     fInstanceAttribSupport = true;
 
     fUseDrawInsteadOfClear = false;
+    fBlacklistCoverageCounting = true; // blacklisting ccpr until we work through a few issues.
     fFenceSyncSupport = true;   // always available in Vulkan
     fCrossContextTextureSupport = false;