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

src/gpu/effects/GrRRectEffect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrRRectEffect.h"
 
 #include "GrConvexPolyEffect.h"
@@ skipping 110 matching lines @@
     } while (NULL == fp);
     return fp;
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GLCircularRRectEffect : public GrGLFragmentProcessor {
 public:
     GLCircularRRectEffect(const GrProcessor&);
 
-    virtual void emitCode(GrGLFPBuilder* builder,
-                          const GrFragmentProcessor& fp,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray&,
-                          const TextureSamplerArray&) override;
+    virtual void emitCode(EmitArgs&) override;
 
     static inline void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*);
 
     void setData(const GrGLProgramDataManager&, const GrProcessor&) override;
 
 private:
     GrGLProgramDataManager::UniformHandle fInnerRectUniform;
     GrGLProgramDataManager::UniformHandle fRadiusPlusHalfUniform;
     SkRRect                               fPrevRRect;
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 GLCircularRRectEffect::GLCircularRRectEffect(const GrProcessor& ) {
     fPrevRRect.setEmpty();
 }
 
-void GLCircularRRectEffect::emitCode(GrGLFPBuilder* builder,
-                                     const GrFragmentProcessor& fp,
-                                     const char* outputColor,
-                                     const char* inputColor,
-                                     const TransformedCoordsArray&,
-                                     const TextureSamplerArray& samplers) {
-    const CircularRRectEffect& crre = fp.cast<CircularRRectEffect>();
+void GLCircularRRectEffect::emitCode(EmitArgs& args) {
+    const CircularRRectEffect& crre = args.fFp.cast<CircularRRectEffect>();
     const char *rectName;
     const char *radiusPlusHalfName;
     // The inner rect is the rrect bounds inset by the radius. Its left, top, right, and bottom
     // edges correspond to components x, y, z, and w, respectively. When a side of the rrect has
     // only rectangular corners, that side's value corresponds to the rect edge's value outset by
     // half a pixel.
-    fInnerRectUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fInnerRectUniform = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                             kVec4f_GrSLType, kDefault_GrSLPrecision,
                                             "innerRect",
                                             &rectName);
-    fRadiusPlusHalfUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fRadiusPlusHalfUniform = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                                  kFloat_GrSLType, kDefault_GrSLPrecision,
                                                  "radiusPlusHalf",
                                                  &radiusPlusHalfName);
 
-    GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+    GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
     const char* fragmentPos = fsBuilder->fragmentPosition();
     // At each quarter-circle corner we compute a vector that is the offset of the fragment position
     // from the circle center. The vector is pinned in x and y to be in the quarter-plane relevant
     // to that corner. This means that points near the interior near the rrect top edge will have
     // a vector that points straight up for both the TL left and TR corners. Computing an
     // alpha from this vector at either the TR or TL corner will give the correct result. Similarly,
     // fragments near the other three edges will get the correct AA. Fragments in the interior of
     // the rrect will have a (0,0) vector at all four corners. So long as the radius > 0.5 they will
     // correctly produce an alpha value of 1 at all four corners. We take the min of all the alphas.
     // The code below is a simplified version of the above that performs maxs on the vector
@@ skipping 86 matching lines @@
                                    fragmentPos, rectName);
             fsBuilder->codeAppendf("\t\tfloat alpha = topAlpha * clamp(%s - length(dxy), 0.0, 1.0);\n",
                                    radiusPlusHalfName);
             break;
     }
 
     if (kInverseFillAA_GrProcessorEdgeType == crre.getEdgeType()) {
         fsBuilder->codeAppend("\t\talpha = 1.0 - alpha;\n");
     }
 
-    fsBuilder->codeAppendf("\t\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str());
+    fsBuilder->codeAppendf("\t\t%s = %s;\n", args.fOutputColor,
+                           (GrGLSLExpr4(args.fInputColor) * GrGLSLExpr1("alpha")).c_str());
 }
 
 void GLCircularRRectEffect::GenKey(const GrProcessor& processor, const GrGLSLCaps&,
                                    GrProcessorKeyBuilder* b) {
     const CircularRRectEffect& crre = processor.cast<CircularRRectEffect>();
     GR_STATIC_ASSERT(kGrProcessorEdgeTypeCnt <= 8);
     b->add32((crre.getCircularCornerFlags() << 3) | crre.getEdgeType());
 }
 
 void GLCircularRRectEffect::setData(const GrGLProgramDataManager& pdman,
@@ skipping 182 matching lines @@
     } while (NULL == fp);
     return fp;
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GLEllipticalRRectEffect : public GrGLFragmentProcessor {
 public:
     GLEllipticalRRectEffect(const GrProcessor&);
 
-    virtual void emitCode(GrGLFPBuilder* builder,
-                          const GrFragmentProcessor& effect,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray&,
-                          const TextureSamplerArray&) override;
+    virtual void emitCode(EmitArgs&) override;
 
     static inline void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*);
 
     void setData(const GrGLProgramDataManager&, const GrProcessor&) override;
 
 private:
     GrGLProgramDataManager::UniformHandle fInnerRectUniform;
     GrGLProgramDataManager::UniformHandle fInvRadiiSqdUniform;
     SkRRect                               fPrevRRect;
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 GLEllipticalRRectEffect::GLEllipticalRRectEffect(const GrProcessor& effect) {
     fPrevRRect.setEmpty();
 }
 
-void GLEllipticalRRectEffect::emitCode(GrGLFPBuilder* builder,
-                                       const GrFragmentProcessor& effect,
-                                       const char* outputColor,
-                                       const char* inputColor,
-                                       const TransformedCoordsArray&,
-                                       const TextureSamplerArray& samplers) {
-    const EllipticalRRectEffect& erre = effect.cast<EllipticalRRectEffect>();
+void GLEllipticalRRectEffect::emitCode(EmitArgs& args) {
+    const EllipticalRRectEffect& erre = args.fFp.cast<EllipticalRRectEffect>();
     const char *rectName;
     // The inner rect is the rrect bounds inset by the x/y radii
-    fInnerRectUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+    fInnerRectUniform = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                             kVec4f_GrSLType, kDefault_GrSLPrecision,
                                             "innerRect",
                                             &rectName);
 
-    GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+    GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
     const char* fragmentPos = fsBuilder->fragmentPosition();
     // At each quarter-ellipse corner we compute a vector that is the offset of the fragment pos
     // to the ellipse center. The vector is pinned in x and y to be in the quarter-plane relevant
     // to that corner. This means that points near the interior near the rrect top edge will have
     // a vector that points straight up for both the TL left and TR corners. Computing an
     // alpha from this vector at either the TR or TL corner will give the correct result. Similarly,
     // fragments near the other three edges will get the correct AA. Fragments in the interior of
     // the rrect will have a (0,0) vector at all four corners. So long as the radii > 0.5 they will
     // correctly produce an alpha value of 1 at all four corners. We take the min of all the alphas.
     // The code below is a simplified version of the above that performs maxs on the vector
     // components before computing distances and alpha values so that only one distance computation
     // need be computed to determine the min alpha.
     fsBuilder->codeAppendf("\t\tvec2 dxy0 = %s.xy - %s.xy;\n", rectName, fragmentPos);
     fsBuilder->codeAppendf("\t\tvec2 dxy1 = %s.xy - %s.zw;\n", fragmentPos, rectName);
     switch (erre.getRRect().getType()) {
         case SkRRect::kSimple_Type: {
             const char *invRadiiXYSqdName;
-            fInvRadiiSqdUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+            fInvRadiiSqdUniform = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                                       kVec2f_GrSLType, kDefault_GrSLPrecision,
                                                       "invRadiiXY",
                                                       &invRadiiXYSqdName);
             fsBuilder->codeAppend("\t\tvec2 dxy = max(max(dxy0, dxy1), 0.0);\n");
             // Z is the x/y offsets divided by squared radii.
             fsBuilder->codeAppendf("\t\tvec2 Z = dxy * %s;\n", invRadiiXYSqdName);
             break;
         }
         case SkRRect::kNinePatch_Type: {
             const char *invRadiiLTRBSqdName;
-            fInvRadiiSqdUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
+            fInvRadiiSqdUniform = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                                       kVec4f_GrSLType, kDefault_GrSLPrecision,
                                                       "invRadiiLTRB",
                                                       &invRadiiLTRBSqdName);
             fsBuilder->codeAppend("\t\tvec2 dxy = max(max(dxy0, dxy1), 0.0);\n");
             // Z is the x/y offsets divided by squared radii. We only care about the (at most) one
             // corner where both the x and y offsets are positive, hence the maxes. (The inverse
             // squared radii will always be positive.)
             fsBuilder->codeAppendf("\t\tvec2 Z = max(max(dxy0 * %s.xy, dxy1 * %s.zw), 0.0);\n",
                                    invRadiiLTRBSqdName, invRadiiLTRBSqdName);
             break;
         }
         default:
             SkFAIL("RRect should always be simple or nine-patch.");
     }
     // implicit is the evaluation of (x/a)^2 + (y/b)^2 - 1.
     fsBuilder->codeAppend("\t\tfloat implicit = dot(Z, dxy) - 1.0;\n");
     // grad_dot is the squared length of the gradient of the implicit.
     fsBuilder->codeAppendf("\t\tfloat grad_dot = 4.0 * dot(Z, Z);\n");
     // avoid calling inversesqrt on zero.
     fsBuilder->codeAppend("\t\tgrad_dot = max(grad_dot, 1.0e-4);\n");
     fsBuilder->codeAppendf("\t\tfloat approx_dist = implicit * inversesqrt(grad_dot);\n");
 
     if (kFillAA_GrProcessorEdgeType == erre.getEdgeType()) {
         fsBuilder->codeAppend("\t\tfloat alpha = clamp(0.5 - approx_dist, 0.0, 1.0);\n");
     } else {
         fsBuilder->codeAppend("\t\tfloat alpha = clamp(0.5 + approx_dist, 0.0, 1.0);\n");
     }
 
-    fsBuilder->codeAppendf("\t\t%s = %s;\n", outputColor,
-                           (GrGLSLExpr4(inputColor) * GrGLSLExpr1("alpha")).c_str());
+    fsBuilder->codeAppendf("\t\t%s = %s;\n", args.fOutputColor,
+                           (GrGLSLExpr4(args.fInputColor) * GrGLSLExpr1("alpha")).c_str());
 }
 
 void GLEllipticalRRectEffect::GenKey(const GrProcessor& effect, const GrGLSLCaps&,
                                      GrProcessorKeyBuilder* b) {
     const EllipticalRRectEffect& erre = effect.cast<EllipticalRRectEffect>();
     GR_STATIC_ASSERT(kLast_GrProcessorEdgeType < (1 << 3));
     b->add32(erre.getRRect().getType() | erre.getEdgeType() << 3);
 }
 
 void GLEllipticalRRectEffect::setData(const GrGLProgramDataManager& pdman,
@@ skipping 135 matching lines @@
                 if (rrect.isNinePatch()) {
                     return EllipticalRRectEffect::Create(edgeType, rrect);
                 }
                 return NULL;
             }
         }
     }
 
     return NULL;
 }