Added GrGLFragmentProcessor::EmitArgs struct for use with emitCode()

src/effects/SkMagnifierImageFilter.cpp

 /*
  * Copyright 2012 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 "SkBitmap.h"
 #include "SkMagnifierImageFilter.h"
 #include "SkColorPriv.h"
@@ skipping 91 matching lines @@
     typedef GrSingleTextureEffect INHERITED;
 };
 
 // For brevity
 typedef GrGLProgramDataManager::UniformHandle UniformHandle;
 
 class GrGLMagnifierEffect : public GrGLFragmentProcessor {
 public:
     GrGLMagnifierEffect(const GrProcessor&);
 
-    virtual void emitCode(GrGLFPBuilder*,
-                          const GrFragmentProcessor&,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray&,
-                          const TextureSamplerArray&) override;
+    virtual void emitCode(EmitArgs&) override;
 
     void setData(const GrGLProgramDataManager&, const GrProcessor&) override;
 
 private:
     UniformHandle       fOffsetVar;
     UniformHandle       fInvZoomVar;
     UniformHandle       fInvInsetVar;
     UniformHandle       fBoundsVar;
 
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 GrGLMagnifierEffect::GrGLMagnifierEffect(const GrProcessor&) {
 }
 
-void GrGLMagnifierEffect::emitCode(GrGLFPBuilder* builder,
-                                   const GrFragmentProcessor&,
-                                   const char* outputColor,
-                                   const char* inputColor,
-                                   const TransformedCoordsArray& coords,
-                                   const TextureSamplerArray& samplers) {
-    fOffsetVar = builder->addUniform(
+void GrGLMagnifierEffect::emitCode(EmitArgs& args) {
+    fOffsetVar = args.fBuilder->addUniform(
         GrGLProgramBuilder::kFragment_Visibility |
         GrGLProgramBuilder::kVertex_Visibility,
         kVec2f_GrSLType, kDefault_GrSLPrecision, "Offset");
-    fInvZoomVar = builder->addUniform(
+    fInvZoomVar = args.fBuilder->addUniform(
         GrGLProgramBuilder::kFragment_Visibility |
         GrGLProgramBuilder::kVertex_Visibility,
         kVec2f_GrSLType, kDefault_GrSLPrecision, "InvZoom");
-    fInvInsetVar = builder->addUniform(
+    fInvInsetVar = args.fBuilder->addUniform(
         GrGLProgramBuilder::kFragment_Visibility |
         GrGLProgramBuilder::kVertex_Visibility,
         kVec2f_GrSLType, kDefault_GrSLPrecision, "InvInset");
-    fBoundsVar = builder->addUniform(
+    fBoundsVar = args.fBuilder->addUniform(
         GrGLProgramBuilder::kFragment_Visibility |
         GrGLProgramBuilder::kVertex_Visibility,
         kVec4f_GrSLType, kDefault_GrSLPrecision, "Bounds");
 
-    GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
-    SkString coords2D = fsBuilder->ensureFSCoords2D(coords, 0);
+    GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
+    SkString coords2D = fsBuilder->ensureFSCoords2D(args.fCoords, 0);
     fsBuilder->codeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str());
     fsBuilder->codeAppendf("\t\tvec2 zoom_coord = %s + %s * %s;\n",
-                           builder->getUniformCStr(fOffsetVar),
+                           args.fBuilder->getUniformCStr(fOffsetVar),
                            coords2D.c_str(),
-                           builder->getUniformCStr(fInvZoomVar));
-    const char* bounds = builder->getUniformCStr(fBoundsVar);
+                           args.fBuilder->getUniformCStr(fInvZoomVar));
+    const char* bounds = args.fBuilder->getUniformCStr(fBoundsVar);
     fsBuilder->codeAppendf("\t\tvec2 delta = (coord - %s.xy) * %s.zw;\n", bounds, bounds);
     fsBuilder->codeAppendf("\t\tdelta = min(delta, vec2(1.0, 1.0) - delta);\n");
-    fsBuilder->codeAppendf("\t\tdelta = delta * %s;\n", builder->getUniformCStr(fInvInsetVar));
+    fsBuilder->codeAppendf("\t\tdelta = delta * %s;\n",
+                           args.fBuilder->getUniformCStr(fInvInsetVar));
 
     fsBuilder->codeAppend("\t\tfloat weight = 0.0;\n");
     fsBuilder->codeAppend("\t\tif (delta.s < 2.0 && delta.t < 2.0) {\n");
     fsBuilder->codeAppend("\t\t\tdelta = vec2(2.0, 2.0) - delta;\n");
     fsBuilder->codeAppend("\t\t\tfloat dist = length(delta);\n");
     fsBuilder->codeAppend("\t\t\tdist = max(2.0 - dist, 0.0);\n");
     fsBuilder->codeAppend("\t\t\tweight = min(dist * dist, 1.0);\n");
     fsBuilder->codeAppend("\t\t} else {\n");
     fsBuilder->codeAppend("\t\t\tvec2 delta_squared = delta * delta;\n");
     fsBuilder->codeAppend("\t\t\tweight = min(min(delta_squared.x, delta_squared.y), 1.0);\n");
     fsBuilder->codeAppend("\t\t}\n");
 
     fsBuilder->codeAppend("\t\tvec2 mix_coord = mix(coord, zoom_coord, weight);\n");
     fsBuilder->codeAppend("\t\tvec4 output_color = ");
-    fsBuilder->appendTextureLookup(samplers[0], "mix_coord");
+    fsBuilder->appendTextureLookup(args.fSamplers[0], "mix_coord");
     fsBuilder->codeAppend(";\n");
 
-    fsBuilder->codeAppendf("\t\t%s = output_color;", outputColor);
+    fsBuilder->codeAppendf("\t\t%s = output_color;", args.fOutputColor);
     SkString modulate;
-    GrGLSLMulVarBy4f(&modulate, outputColor, inputColor);
+    GrGLSLMulVarBy4f(&modulate, args.fOutputColor, args.fInputColor);
     fsBuilder->codeAppend(modulate.c_str());
 }
 
 void GrGLMagnifierEffect::setData(const GrGLProgramDataManager& pdman,
                                   const GrProcessor& effect) {
     const GrMagnifierEffect& zoom = effect.cast<GrMagnifierEffect>();
     pdman.set2f(fOffsetVar, zoom.x_offset(), zoom.y_offset());
     pdman.set2f(fInvZoomVar, zoom.x_inv_zoom(), zoom.y_inv_zoom());
     pdman.set2f(fInvInsetVar, zoom.x_inv_inset(), zoom.y_inv_inset());
     pdman.set4f(fBoundsVar, zoom.bounds().x(), zoom.bounds().y(),
@@ skipping 191 matching lines @@
 
 #ifndef SK_IGNORE_TO_STRING
 void SkMagnifierImageFilter::toString(SkString* str) const {
     str->appendf("SkMagnifierImageFilter: (");
     str->appendf("src: (%f,%f,%f,%f) ",
                  fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom);
     str->appendf("inset: %f", fInset);
     str->append(")");
 }
 #endif