move GrGLPathProcessor back into GrPathProcessor

src/gpu/GrPathProcessor.cpp

 /*
 * Copyright 2013 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "GrPathProcessor.h"
 
-#include "gl/GrGLPathProcessor.h"
 #include "gl/GrGLGpu.h"
 
 #include "glsl/GrGLSLCaps.h"
 
+class GrGLPathProcessor : public GrGLPrimitiveProcessor {
+public:
+    GrGLPathProcessor() : fColor(GrColor_ILLEGAL) {}
+
+    static void GenKey(const GrPathProcessor& pathProc,
+                       const GrGLSLCaps&,
+                       GrProcessorKeyBuilder* b) {
+        b->add32(SkToInt(pathProc.opts().readsColor()) |
+                 SkToInt(pathProc.opts().readsCoverage()) << 16);
+    }
+
+    void emitCode(EmitArgs& args) override {
+        GrGLGPBuilder* pb = args.fPB;
+        GrGLFragmentBuilder* fs = args.fPB->getFragmentShaderBuilder();
+        const GrPathProcessor& pathProc = args.fGP.cast<GrPathProcessor>();
+
+        // emit transforms
+        this->emitTransforms(args.fPB, args.fTransformsIn, args.fTransformsOut);
+
+        // Setup uniform color
+        if (pathProc.opts().readsColor()) {
+            const char* stagedLocalVarName;
+            fColorUniform = pb->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+                                           kVec4f_GrSLType,
+                                           kDefault_GrSLPrecision,
+                                           "Color",
+                                           &stagedLocalVarName);
+            fs->codeAppendf("%s = %s;", args.fOutputColor, stagedLocalVarName);
+        }
+
+        // setup constant solid coverage
+        if (pathProc.opts().readsCoverage()) {
+            fs->codeAppendf("%s = vec4(1);", args.fOutputCoverage);
+        }
+    }
+
+    void emitTransforms(GrGLGPBuilder* pb, const TransformsIn& tin, TransformsOut* tout) {
+        tout->push_back_n(tin.count());
+        fInstalledTransforms.push_back_n(tin.count());
+        for (int i = 0; i < tin.count(); i++) {
+            const ProcCoords& coordTransforms = tin[i];
+            fInstalledTransforms[i].push_back_n(coordTransforms.count());
+            for (int t = 0; t < coordTransforms.count(); t++) {
+                GrSLType varyingType =
+                        coordTransforms[t]->getMatrix().hasPerspective() ? kVec3f_GrSLType :
+                                                                           kVec2f_GrSLType;
+
+                SkString strVaryingName("MatrixCoord");
+                strVaryingName.appendf("_%i_%i", i, t);
+                GrGLVertToFrag v(varyingType);
+                fInstalledTransforms[i][t].fHandle =
+                        pb->addSeparableVarying(strVaryingName.c_str(), &v).toIndex();
+                fInstalledTransforms[i][t].fType = varyingType;
+
+                SkNEW_APPEND_TO_TARRAY(&(*tout)[i], GrGLProcessor::TransformedCoords,
+                                       (SkString(v.fsIn()), varyingType));
+            }
+        }
+    }
+
+    void setData(const GrGLProgramDataManager& pd, const GrPrimitiveProcessor& primProc) override {
+        const GrPathProcessor& pathProc = primProc.cast<GrPathProcessor>();
+        if (pathProc.opts().readsColor() && pathProc.color() != fColor) {
+            GrGLfloat c[4];
+            GrColorToRGBAFloat(pathProc.color(), c);
+            pd.set4fv(fColorUniform, 1, c);
+            fColor = pathProc.color();
+        }
+    }
+
+    void setTransformData(const GrPrimitiveProcessor& primProc,
+                          const GrGLProgramDataManager& pdman,
+                          int index,
+                          const SkTArray<const GrCoordTransform*, true>& coordTransforms) override {
+        const GrPathProcessor& pathProc = primProc.cast<GrPathProcessor>();
+        SkSTArray<2, Transform, true>& transforms = fInstalledTransforms[index];
+        int numTransforms = transforms.count();
+        for (int t = 0; t < numTransforms; ++t) {
+            SkASSERT(transforms[t].fHandle.isValid());
+            const SkMatrix& transform = GetTransformMatrix(pathProc.localMatrix(),
+                                                           *coordTransforms[t]);
+            if (transforms[t].fCurrentValue.cheapEqualTo(transform)) {
+                continue;
+            }
+            transforms[t].fCurrentValue = transform;
+
+            SkASSERT(transforms[t].fType == kVec2f_GrSLType ||
+                     transforms[t].fType == kVec3f_GrSLType);
+            unsigned components = transforms[t].fType == kVec2f_GrSLType ? 2 : 3;
+            pdman.setPathFragmentInputTransform(transforms[t].fHandle, components, transform);
+        }
+    }
+
+private:
+    UniformHandle fColorUniform;
+    GrColor fColor;
+
+    typedef GrGLPrimitiveProcessor INHERITED;
+};
+
 GrPathProcessor::GrPathProcessor(GrColor color,
                                  const GrPipelineOptimizations& opts,
                                  const SkMatrix& viewMatrix,
                                  const SkMatrix& localMatrix)
     : INHERITED(true)
     , fColor(color)
     , fViewMatrix(viewMatrix)
     , fLocalMatrix(localMatrix)
     , fOpts(opts) {
     this->initClassID<GrPathProcessor>();
 }
 
 void GrPathProcessor::getGLProcessorKey(const GrGLSLCaps& caps,
                                         GrProcessorKeyBuilder* b) const {
     GrGLPathProcessor::GenKey(*this, caps, b);
 }
 
 GrGLPrimitiveProcessor* GrPathProcessor::createGLInstance(const GrGLSLCaps& caps) const {
     SkASSERT(caps.pathRenderingSupport());
     return new GrGLPathProcessor();
 }