Revert "ccpr: Draw curves in a single pass"

This reverts commit df04ce29490a24f9d5b4f5caafd8f6a3368a19e0.

Reason for revert: Going to revisit AAA quality

Original change's description:
> ccpr: Draw curves in a single pass
> 
> Throws out the complicated MSAA curve corner shaders, and instead just
> ramps coverage to zero at bloat vertices that fall outside the curve.
> 
> Updates SampleCCPRGeometry to better visualize this new geometry by
> clearing to black and drawing with SkBlendMode::kPlus.
> 
> Bug: skia:
> Change-Id: Ibe86cbc741d8b015127b10dd43e3b52e7cb35732
> Reviewed-on: https://skia-review.googlesource.com/112626
> Commit-Queue: Chris Dalton <csmartdalton@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=bsalomon@google.com,csmartdalton@google.com

Change-Id: I014baa60b248d870717f5ee8794e0bed66da86e6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/113181
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>

1 files changed, 25 insertions, 5 deletions

diff --git a/src/gpu/ccpr/GrCCCubicShader.h b/src/gpu/ccpr/GrCCCubicShader.h
index 70d3300461..063549264a 100644
--- a/src/gpu/ccpr/GrCCCubicShader.h
+++ b/src/gpu/ccpr/GrCCCubicShader.h
@@ -24,17 +24,37 @@
 class GrCCCubicShader : public GrCCCoverageProcessor::Shader {
 protected:
     void emitSetupCode(GrGLSLVertexGeoBuilder*, const char* pts, const char* repetitionID,
-                       const char* wind, GeometryVars*) const override;
+                       const char* wind, GeometryVars*) const final;
+    virtual void onEmitSetupCode(GrGLSLVertexGeoBuilder*, const char* pts, const char* repetitionID,
+                                 GeometryVars*) const {}
 
     void onEmitVaryings(GrGLSLVaryingHandler*, GrGLSLVarying::Scope, SkString* code,
-                        const char* position, const char* inputCoverage, const char* wind) override;
+                        const char* position, const char* inputCoverage, const char* wind) final;
+    virtual void onEmitVaryings(GrGLSLVaryingHandler*, GrGLSLVarying::Scope, SkString* code) = 0;
 
-    void onEmitFragmentCode(const GrCCCoverageProcessor&, GrGLSLFPFragmentBuilder*,
-                            const char* outputCoverage) const override;
+    void onEmitFragmentCode(GrGLSLFPFragmentBuilder*, const char* outputCoverage) const final;
+    virtual void emitCoverage(GrGLSLFPFragmentBuilder*, const char* outputCoverage) const = 0;
 
     GrShaderVar fKLMMatrix{"klm_matrix", kFloat3x3_GrSLType};
-    GrGLSLVarying fKLMW;
+    GrShaderVar fEdgeDistanceEquation{"edge_distance_equation", kFloat3_GrSLType};
+    GrGLSLVarying fKLMD;
+};
+
+class GrCCCubicHullShader : public GrCCCubicShader {
+    void onEmitVaryings(GrGLSLVaryingHandler*, GrGLSLVarying::Scope, SkString* code) override;
+    void emitCoverage(GrGLSLFPFragmentBuilder*, const char* outputCoverage) const override;
+
     GrGLSLVarying fGradMatrix;
 };
 
+class GrCCCubicCornerShader : public GrCCCubicShader {
+    void onEmitSetupCode(GrGLSLVertexGeoBuilder*, const char* pts, const char* repetitionID,
+                         GeometryVars*) const override;
+    void onEmitVaryings(GrGLSLVaryingHandler*, GrGLSLVarying::Scope, SkString* code) override;
+    void emitCoverage(GrGLSLFPFragmentBuilder*, const char* outputCoverage) const override;
+
+    GrGLSLVarying fdKLMDdx;
+    GrGLSLVarying fdKLMDdy;
+};
+
 #endif