Refactor various gradient effect classes

src/effects/gradients/SkGradientShader.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Sk4fLinearGradient.h"
 #include "SkGradientShaderPriv.h"
 #include "SkLinearGradient.h"
@@ skipping 893 matching lines @@
 
 #include "effects/GrTextureStripAtlas.h"
 #include "GrContext.h"
 #include "GrInvariantOutput.h"
 #include "gl/GrGLContext.h"
 #include "glsl/GrGLSLFragmentShaderBuilder.h"
 #include "glsl/GrGLSLProgramDataManager.h"
 #include "glsl/GrGLSLUniformHandler.h"
 #include "SkGr.h"
 
-GrGLGradientEffect::GrGLGradientEffect()
+GrGradientEffect::GLSLProcessor::GLSLProcessor()
     : fCachedYCoord(SK_ScalarMax) {
 }
 
-void GrGLGradientEffect::emitUniforms(GrGLSLUniformHandler* uniformHandler,
-                                      const GrGradientEffect& ge) {
+void GrGradientEffect::GLSLProcessor::emitUniforms(GrGLSLUniformHandler* uniformHandler,
+                                                   const GrGradientEffect& ge) {
 
     if (SkGradientShaderBase::kTwo_GpuColorType == ge.getColorType()) { // 2 Color case
         fColorStartUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
                                                     kVec4f_GrSLType, kDefault_GrSLPrecision,
                                                     "GradientStartColor");
         fColorEndUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
                                                   kVec4f_GrSLType, kDefault_GrSLPrecision,
                                                   "GradientEndColor");
 
     } else if (SkGradientShaderBase::kThree_GpuColorType == ge.getColorType()) { // 3 Color Case
@@ skipping 29 matching lines @@
                                      const SkColor* color){
        float a = SkColorGetA(*color) / 255.f;
        float aDiv255 = a / 255.f;
        pdman.set4f(uni,
                    SkColorGetR(*color) * aDiv255,
                    SkColorGetG(*color) * aDiv255,
                    SkColorGetB(*color) * aDiv255,
                    a);
 }
 
-void GrGLGradientEffect::onSetData(const GrGLSLProgramDataManager& pdman,
-                                   const GrProcessor& processor) {
+void GrGradientEffect::GLSLProcessor::onSetData(const GrGLSLProgramDataManager& pdman,
+                                                const GrProcessor& processor) {
 
     const GrGradientEffect& e = processor.cast<GrGradientEffect>();
 
 
     if (SkGradientShaderBase::kTwo_GpuColorType == e.getColorType()){
 
         if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) {
             set_mul_color_uni(pdman, fColorStartUni, e.getColors(0));
             set_mul_color_uni(pdman, fColorEndUni,   e.getColors(1));
         } else {
@@ skipping 16 matching lines @@
 
         SkScalar yCoord = e.getYCoord();
         if (yCoord != fCachedYCoord) {
             pdman.set1f(fFSYUni, yCoord);
             fCachedYCoord = yCoord;
         }
     }
 }
 
 
-uint32_t GrGLGradientEffect::GenBaseGradientKey(const GrProcessor& processor) {
+uint32_t GrGradientEffect::GLSLProcessor::GenBaseGradientKey(const GrProcessor& processor) {
     const GrGradientEffect& e = processor.cast<GrGradientEffect>();
 
     uint32_t key = 0;
 
     if (SkGradientShaderBase::kTwo_GpuColorType == e.getColorType()) {
         key |= kTwoColorKey;
     } else if (SkGradientShaderBase::kThree_GpuColorType == e.getColorType()) {
         key |= kThreeColorKey;
     }
 
     if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) {
         key |= kPremulBeforeInterpKey;
     }
 
     return key;
 }
 
-void GrGLGradientEffect::emitColor(GrGLSLFPFragmentBuilder* fragBuilder,
-                                   GrGLSLUniformHandler* uniformHandler,
-                                   const GrGLSLCaps* glslCaps,
-                                   const GrGradientEffect& ge,
-                                   const char* gradientTValue,
-                                   const char* outputColor,
-                                   const char* inputColor,
-                                   const SamplerHandle* texSamplers) {
+void GrGradientEffect::GLSLProcessor::emitColor(GrGLSLFPFragmentBuilder* fragBuilder,
+                                                GrGLSLUniformHandler* uniformHandler,
+                                                const GrGLSLCaps* glslCaps,
+                                                const GrGradientEffect& ge,
+                                                const char* gradientTValue,
+                                                const char* outputColor,
+                                                const char* inputColor,
+                                                const SamplerHandle* texSamplers) {
     if (SkGradientShaderBase::kTwo_GpuColorType == ge.getColorType()){
         fragBuilder->codeAppendf("\tvec4 colorTemp = mix(%s, %s, clamp(%s, 0.0, 1.0));\n",
                                  uniformHandler->getUniformVariable(fColorStartUni).c_str(),
                                  uniformHandler->getUniformVariable(fColorEndUni).c_str(),
                                  gradientTValue);
         // Note that we could skip this step if both colors are known to be opaque. Two
         // considerations:
         // The gradient SkShader reporting opaque is more restrictive than necessary in the two pt
         // case. Make sure the key reflects this optimization (and note that it can use the same
         // shader as thekBeforeIterp case). This same optimization applies to the 3 color case
@@ skipping 165 matching lines @@
             (*stops)[i] = stop;
             stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - stop) : 1.f;
         }
     }
     *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileModeCount));
 
     return outColors;
 }
 
 #endif