Move glsl onto EmitArgs struct for emitCode

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 1010 matching lines @@
 
     if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) {
         key |= kPremulBeforeInterpKey;
     }
 
     return key;
 }
 
 void GrGLGradientEffect::emitColor(GrGLSLFPBuilder* builder,
                                    GrGLSLFragmentBuilder* fragBuilder,
+                                   const GrGLSLCaps* glslCaps,
                                    const GrGradientEffect& ge,
                                    const char* gradientTValue,
                                    const char* outputColor,
                                    const char* inputColor,
                                    const TextureSamplerArray& samplers) {
     if (SkGradientShaderBase::kTwo_GpuColorType == ge.getColorType()){
         fragBuilder->codeAppendf("\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.

[joshualitt, 2015/11/18 17:42:50]

/n

         if (GrGradientEffect::kAfterInterp_PremulType == ge.getPremulType()) {
             fragBuilder->codeAppend("\tcolorTemp.rgb *= colorTemp.a;\n");
         }
 
         fragBuilder->codeAppendf("\t%s = %s;\n", outputColor,
                                  (GrGLSLExpr4(inputColor) * GrGLSLExpr4("colorTemp")).c_str());
     } else if (SkGradientShaderBase::kThree_GpuColorType == ge.getColorType()) {
         fragBuilder->codeAppendf("\tfloat oneMinus2t = 1.0 - (2.0 * (%s));\n",
                                  gradientTValue);
         fragBuilder->codeAppendf("\tvec4 colorTemp = clamp(oneMinus2t, 0.0, 1.0) * %s;\n",
                                  builder->getUniformVariable(fColorStartUni).c_str());
-        if (!builder->glslCaps()->canUseMinAndAbsTogether()) {
+        if (!glslCaps->canUseMinAndAbsTogether()) {
             // The Tegra3 compiler will sometimes never return if we have
             // min(abs(oneMinus2t), 1.0), or do the abs first in a separate expression.
             fragBuilder->codeAppend("\tfloat minAbs = abs(oneMinus2t);\n");
             fragBuilder->codeAppend("\tminAbs = minAbs > 1.0 ? 1.0 : minAbs;\n");
             fragBuilder->codeAppendf("\tcolorTemp += (1.0 - minAbs) * %s;\n",
                                      builder->getUniformVariable(fColorMidUni).c_str());
         } else {
             fragBuilder->codeAppendf("\tcolorTemp += (1.0 - min(abs(oneMinus2t), 1.0)) * %s;\n",
                                      builder->getUniformVariable(fColorMidUni).c_str());
         }
@@ skipping 139 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