Allow GrGLEffects to produce variable length keys.

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 "SkGradientShaderPriv.h"
 #include "SkLinearGradient.h"
 #include "SkRadialGradient.h"
@@ skipping 844 matching lines @@
 #include "gl/GrGLShaderBuilder.h"
 #include "SkGr.h"
 
 GrGLGradientEffect::GrGLGradientEffect(const GrBackendEffectFactory& factory)
     : INHERITED(factory)
     , fCachedYCoord(SK_ScalarMax) {
 }
 
 GrGLGradientEffect::~GrGLGradientEffect() { }
 
-void GrGLGradientEffect::emitUniforms(GrGLShaderBuilder* builder, EffectKey key) {
+void GrGLGradientEffect::emitUniforms(GrGLShaderBuilder* builder, uint32_t baseKey) {
 
-    if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(key)) { // 2 Color case
+    if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(baseKey)) { // 2 Color case
         fColorStartUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                              kVec4f_GrSLType, "GradientStartColor");
         fColorEndUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                            kVec4f_GrSLType, "GradientEndColor");
 
-    } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(key)){ // 3 Color Case
+    } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(baseKey)){ // 3 Color Case
         fColorStartUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                              kVec4f_GrSLType, "GradientStartColor");
         fColorMidUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                            kVec4f_GrSLType, "GradientMidColor");
         fColorEndUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                              kVec4f_GrSLType, "GradientEndColor");
 
     } else { // if not a fast case
         fFSYUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
                                       kFloat_GrSLType, "GradientYCoordFS");
@@ skipping 53 matching lines @@
 
         SkScalar yCoord = e.getYCoord();
         if (yCoord != fCachedYCoord) {
             uman.set1f(fFSYUni, yCoord);
             fCachedYCoord = yCoord;
         }
     }
 }
 
 
-GrGLEffect::EffectKey GrGLGradientEffect::GenBaseGradientKey(const GrDrawEffect& drawEffect) {
+uint32_t GrGLGradientEffect::GenBaseGradientKey(const GrDrawEffect& drawEffect) {
     const GrGradientEffect& e = drawEffect.castEffect<GrGradientEffect>();
 
-    EffectKey key = 0;
+    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(GrGLShaderBuilder* builder,
                                    const char* gradientTValue,
-                                   EffectKey key,
+                                   uint32_t baseKey,
                                    const char* outputColor,
                                    const char* inputColor,
                                    const TextureSamplerArray& samplers) {
-    if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(key)){
+    if (SkGradientShaderBase::kTwo_GpuColorType == ColorTypeFromKey(baseKey)){
         builder->fsCodeAppendf("\tvec4 colorTemp = mix(%s, %s, clamp(%s, 0.0, 1.0));\n",
                                builder->getUniformVariable(fColorStartUni).c_str(),
                                builder->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 below.
-        if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(key)) {
+        if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(baseKey)) {
             builder->fsCodeAppend("\tcolorTemp.rgb *= colorTemp.a;\n");
         }
 
         builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
                                (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp")).c_str());
-    } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(key)){
+    } else if (SkGradientShaderBase::kThree_GpuColorType == ColorTypeFromKey(baseKey)){
         builder->fsCodeAppendf("\tfloat oneMinus2t = 1.0 - (2.0 * (%s));\n",
                                gradientTValue);
         builder->fsCodeAppendf("\tvec4 colorTemp = clamp(oneMinus2t, 0.0, 1.0) * %s;\n",
                                builder->getUniformVariable(fColorStartUni).c_str());
         if (kTegra3_GrGLRenderer == builder->ctxInfo().renderer()) {
             // The Tegra3 compiler will sometimes never return if we have
             // min(abs(oneMinus2t), 1.0), or do the abs first in a separate expression.
             builder->fsCodeAppend("\tfloat minAbs = abs(oneMinus2t);\n");
             builder->fsCodeAppend("\tminAbs = minAbs > 1.0 ? 1.0 : minAbs;\n");
             builder->fsCodeAppendf("\tcolorTemp += (1.0 - minAbs) * %s;\n",
                                    builder->getUniformVariable(fColorMidUni).c_str());
         } else {
             builder->fsCodeAppendf("\tcolorTemp += (1.0 - min(abs(oneMinus2t), 1.0)) * %s;\n",
                                    builder->getUniformVariable(fColorMidUni).c_str());
         }
         builder->fsCodeAppendf("\tcolorTemp += clamp(-oneMinus2t, 0.0, 1.0) * %s;\n",
                                builder->getUniformVariable(fColorEndUni).c_str());
-        if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(key)) {
+        if (GrGradientEffect::kAfterInterp_PremulType == PremulTypeFromKey(baseKey)) {
             builder->fsCodeAppend("\tcolorTemp.rgb *= colorTemp.a;\n");
         }
 
         builder->fsCodeAppendf("\t%s = %s;\n", outputColor,
                                (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp")).c_str());
     } else {
         builder->fsCodeAppendf("\tvec2 coord = vec2(%s, %s);\n",
                                gradientTValue,
                                builder->getUniformVariable(fFSYUni).c_str());
         builder->fsCodeAppendf("\t%s = ", outputColor);
@@ skipping 132 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