Isolate VertexBuilder from GrGLShaderBuilder

src/gpu/GrAARectRenderer.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAARectRenderer.h"
 #include "GrRefCnt.h"
 #include "GrGpu.h"
@@ skipping 32 matching lines @@
     public:
         GLEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
         : INHERITED (factory) {}
 
         virtual void emitCode(GrGLShaderBuilder* builder,
                               const GrDrawEffect& drawEffect,
                               EffectKey key,
                               const char* outputColor,
                               const char* inputColor,
                               const TextureSamplerArray& samplers) SK_OVERRIDE {
+            GrGLShaderBuilder::VertexBuilder* vertexBuilder = builder->getVertexBuilder();
+            SkASSERT(NULL != vertexBuilder);
+
             // setup the varying for the Axis aligned rect effect
             //      xy -> interpolated offset
             //      zw -> w/2+0.5, h/2+0.5
             const char *vsRectName, *fsRectName;
-            builder->addVarying(kVec4f_GrSLType, "Rect", &vsRectName, &fsRectName);
+            vertexBuilder->addVarying(kVec4f_GrSLType, "Rect", &vsRectName, &fsRectName);
             const SkString* attr0Name =
-                builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]);
-            builder->vsCodeAppendf("\t%s = %s;\n", vsRectName, attr0Name->c_str());
+                vertexBuilder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]);
+            vertexBuilder->vsCodeAppendf("\t%s = %s;\n", vsRectName, attr0Name->c_str());
 
             // TODO: compute all these offsets, spans, and scales in the VS
             builder->fsCodeAppendf("\tfloat insetW = min(1.0, %s.z) - 0.5;\n", fsRectName);
             builder->fsCodeAppendf("\tfloat insetH = min(1.0, %s.w) - 0.5;\n", fsRectName);
             builder->fsCodeAppend("\tfloat outset = 0.5;\n");
             // For rects > 1 pixel wide and tall the span's are noops (i.e., 1.0). For rects
             // < 1 pixel wide or tall they serve to normalize the < 1 ramp to a 0 .. 1 range.
             builder->fsCodeAppend("\tfloat spanW = insetW + outset;\n");
             builder->fsCodeAppend("\tfloat spanH = insetH + outset;\n");
             // For rects < 1 pixel wide or tall, these scale factors are used to cap the maximum
@@ skipping 89 matching lines @@
     public:
         GLEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
         : INHERITED (factory) {}
 
         virtual void emitCode(GrGLShaderBuilder* builder,
                               const GrDrawEffect& drawEffect,
                               EffectKey key,
                               const char* outputColor,
                               const char* inputColor,
                               const TextureSamplerArray& samplers) SK_OVERRIDE {
+            GrGLShaderBuilder::VertexBuilder* vertexBuilder = builder->getVertexBuilder();
+            SkASSERT(NULL != vertexBuilder);
+
             // setup the varying for the center point and the unit vector
             // that points down the height of the rect
             const char *vsRectEdgeName, *fsRectEdgeName;
-            builder->addVarying(kVec4f_GrSLType, "RectEdge",
-                                &vsRectEdgeName, &fsRectEdgeName);
+            vertexBuilder->addVarying(kVec4f_GrSLType, "RectEdge",
+                                      &vsRectEdgeName, &fsRectEdgeName);
             const SkString* attr0Name =
-                builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]);
-            builder->vsCodeAppendf("\t%s = %s;\n", vsRectEdgeName, attr0Name->c_str());
+                vertexBuilder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[0]);
+            vertexBuilder->vsCodeAppendf("\t%s = %s;\n", vsRectEdgeName, attr0Name->c_str());
 
             // setup the varying for width/2+.5 and height/2+.5
             const char *vsWidthHeightName, *fsWidthHeightName;
-            builder->addVarying(kVec2f_GrSLType, "WidthHeight",
-                                &vsWidthHeightName, &fsWidthHeightName);
+            vertexBuilder->addVarying(kVec2f_GrSLType, "WidthHeight",
+                                      &vsWidthHeightName, &fsWidthHeightName);
             const SkString* attr1Name =
-                builder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[1]);
-            builder->vsCodeAppendf("\t%s = %s;\n", vsWidthHeightName, attr1Name->c_str());
+                vertexBuilder->getEffectAttributeName(drawEffect.getVertexAttribIndices()[1]);
+            vertexBuilder->vsCodeAppendf("\t%s = %s;\n", vsWidthHeightName, attr1Name->c_str());
 
             // TODO: compute all these offsets, spans, and scales in the VS
             builder->fsCodeAppendf("\tfloat insetW = min(1.0, %s.x) - 0.5;\n", fsWidthHeightName);
             builder->fsCodeAppendf("\tfloat insetH = min(1.0, %s.y) - 0.5;\n", fsWidthHeightName);
             builder->fsCodeAppend("\tfloat outset = 0.5;\n");
             // For rects > 1 pixel wide and tall the span's are noops (i.e., 1.0). For rects
             // < 1 pixel wide or tall they serve to normalize the < 1 ramp to a 0 .. 1 range.
             builder->fsCodeAppend("\tfloat spanW = insetW + outset;\n");
             builder->fsCodeAppend("\tfloat spanH = insetH + outset;\n");
             // For rects < 1 pixel wide or tall, these scale factors are used to cap the maximum
@@ skipping 607 matching lines @@
     // can't call mapRect for devInside since it calls sort
     combinedMatrix.mapPoints((SkPoint*)&devInside, (const SkPoint*)&rects[1], 2);
 
     if (devInside.isEmpty()) {
         this->fillAARect(gpu, target, devOutside, SkMatrix::I(), devOutside, useVertexCoverage);
         return;
     }
 
     this->geometryStrokeAARect(gpu, target, devOutside, devInside, useVertexCoverage);
 }