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Diffstat (limited to 'src/gpu/ccpr/GrCCPRCubicShader.h')
-rw-r--r-- | src/gpu/ccpr/GrCCPRCubicShader.h | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/src/gpu/ccpr/GrCCPRCubicShader.h b/src/gpu/ccpr/GrCCPRCubicShader.h deleted file mode 100644 index f9655be9c3..0000000000 --- a/src/gpu/ccpr/GrCCPRCubicShader.h +++ /dev/null @@ -1,94 +0,0 @@ -/* - * Copyright 2017 Google Inc. - * - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#ifndef GrCCPRCubicShader_DEFINED -#define GrCCPRCubicShader_DEFINED - -#include "ccpr/GrCCPRCoverageProcessor.h" - -/** - * This class renders the coverage of convex closed cubic segments using the techniques outlined in - * "Resolution Independent Curve Rendering using Programmable Graphics Hardware" by Charles Loop and - * Jim Blinn: - * - * https://www.microsoft.com/en-us/research/wp-content/uploads/2005/01/p1000-loop.pdf - * - * The provided curve segments must be convex, monotonic with respect to the vector of their closing - * edge [P3 - P0], and must not contain or be near any inflection points or loop intersections. - * (Use GrCCPRGeometry.) - */ -class GrCCPRCubicShader : public GrCCPRCoverageProcessor::Shader { -public: - enum class CubicType { - kSerpentine, - kLoop - }; - -protected: - GrCCPRCubicShader(CubicType cubicType) : fCubicType(cubicType) {} - - int getNumInputPoints() const final { return 4; } - - void appendInputPointFetch(const GrCCPRCoverageProcessor&, GrGLSLShaderBuilder*, - const TexelBufferHandle& pointsBuffer, - const char* pointId) const final; - - void emitWind(GrGLSLShaderBuilder*, const char* pts, const char* rtAdjust, - const char* outputWind) const final; - - void emitSetupCode(GrGLSLShaderBuilder*, const char* pts, const char* segmentId, - const char* bloat, const char* wind, const char* rtAdjust, - GeometryVars*) const final; - - virtual void onEmitSetupCode(GrGLSLShaderBuilder*, const char* pts, const char* segmentId, - const char* rtAdjust, GeometryVars*) const = 0; - - WindHandling onEmitVaryings(GrGLSLVaryingHandler*, SkString* code, const char* position, - const char* coverage, const char* wind) final; - - virtual void onEmitVaryings(GrGLSLVaryingHandler*, SkString* code) = 0; - - const CubicType fCubicType; - GrShaderVar fKLMMatrix{"klm_matrix", kFloat3x3_GrSLType}; - GrShaderVar fKLMDerivatives{"klm_derivatives", kFloat2_GrSLType, 3}; - GrShaderVar fEdgeDistanceEquation{"edge_distance_equation", kFloat3_GrSLType}; - GrGLSLGeoToFrag fKLMD{kFloat4_GrSLType}; -}; - -class GrCCPRCubicHullShader : public GrCCPRCubicShader { -public: - GrCCPRCubicHullShader(CubicType cubicType) : GrCCPRCubicShader(cubicType) {} - -private: - GeometryType getGeometryType() const override { return GeometryType::kHull; } - int getNumSegments() const override { return 4; } // 4 wedges. - void onEmitSetupCode(GrGLSLShaderBuilder*, const char* pts, const char* wedgeId, - const char* rtAdjust, GeometryVars*) const override; - void onEmitVaryings(GrGLSLVaryingHandler*, SkString* code) override; - void onEmitFragmentCode(GrGLSLPPFragmentBuilder*, const char* outputCoverage) const override; - - GrGLSLGeoToFrag fGradMatrix{kFloat2x2_GrSLType}; -}; - -class GrCCPRCubicCornerShader : public GrCCPRCubicShader { -public: - GrCCPRCubicCornerShader(CubicType cubicType) : GrCCPRCubicShader(cubicType) {} - -private: - GeometryType getGeometryType() const override { return GeometryType::kCorners; } - int getNumSegments() const override { return 2; } // 2 corners. - void onEmitSetupCode(GrGLSLShaderBuilder*, const char* pts, const char* cornerId, - const char* rtAdjust, GeometryVars*) const override; - void onEmitVaryings(GrGLSLVaryingHandler*, SkString* code) override; - void onEmitFragmentCode(GrGLSLPPFragmentBuilder*, const char* outputCoverage) const override; - - GrShaderVar fEdgeDistanceDerivatives{"edge_distance_derivatives", kFloat2_GrSLType}; - GrGLSLGeoToFrag fdKLMDdx{kFloat4_GrSLType}; - GrGLSLGeoToFrag fdKLMDdy{kFloat4_GrSLType}; -}; - -#endif |