Update how we send draws to gpu backend to reduce state setting.

src/gpu/batches/GrDrawPathBatch.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDrawPathBatch.h"
 
 static void pre_translate_transform_values(const float* xforms,
                                            GrPathRendering::PathTransformType type, int count,
                                            SkScalar x, SkScalar y, float* dst);
 
 SkString GrDrawPathBatch::dumpInfo() const {
     SkString string;
     string.printf("PATH: 0x%p", fPath.get());
     return string;
 }
 
 void GrDrawPathBatch::onDraw(GrBatchFlushState* state) {
     GrProgramDesc  desc;
 
     SkAutoTUnref<GrPathProcessor> pathProc(GrPathProcessor::Create(this->color(),
                                                                    this->overrides(),
                                                                    this->viewMatrix()));
-    state->gpu()->buildProgramDesc(&desc, *pathProc, *this->pipeline());
-    GrPathRendering::DrawPathArgs args(pathProc, this->pipeline(),
-                                        &desc, &this->stencilSettings());
-    state->gpu()->pathRendering()->drawPath(args, fPath.get());
+    state->gpu()->pathRendering()->drawPath(*this->pipeline(), *pathProc, this->stencilSettings(),
+                                            fPath.get());
 }
 
 SkString GrDrawPathRangeBatch::dumpInfo() const {
     SkString string;
     string.printf("RANGE: 0x%p COUNTS: [", fPathRange.get());
     for (DrawList::Iter iter(fDraws); iter.get(); iter.next()) {
         string.appendf("%d, ", iter.get()->fInstanceData->count());
     }
     string.remove(string.size() - 2, 2);
     string.append("]");
@@ skipping 76 matching lines @@
 
     SkMatrix localMatrix;
     localMatrix.setScale(fScale, fScale);
     localMatrix.preTranslate(head.fX, head.fY);
 
     SkAutoTUnref<GrPathProcessor> pathProc(GrPathProcessor::Create(this->color(),
                                                                    this->overrides(),
                                                                    drawMatrix,
                                                                    localMatrix));
 
-    GrProgramDesc  desc;
-    state->gpu()->buildProgramDesc(&desc, *pathProc, *this->pipeline());
-    GrPathRendering::DrawPathArgs args(pathProc, this->pipeline(),
-                                       &desc, &this->stencilSettings());
-
     if (fDraws.count() == 1) {
         const InstanceData& instances = *head.fInstanceData;
-        state->gpu()->pathRendering()->drawPaths(args, fPathRange.get(), instances.indices(),
+        state->gpu()->pathRendering()->drawPaths(*this->pipeline(),
+                                                 *pathProc,
+                                                 this->stencilSettings(),
+                                                 fPathRange.get(),
+                                                 instances.indices(),
                                                  GrPathRange::kU16_PathIndexType,
                                                  instances.transformValues(),
                                                  instances.transformType(),
                                                  instances.count());
     } else {
         int floatsPerTransform = GrPathRendering::PathTransformSize(this->transformType());
         SkAutoSTMalloc<4096, float> transformStorage(floatsPerTransform * fTotalPathCount);
         SkAutoSTMalloc<2048, uint16_t> indexStorage(fTotalPathCount);
         int idx = 0;
         for (DrawList::Iter iter(fDraws); iter.get(); iter.next()) {
             const Draw& draw = *iter.get();
             const InstanceData& instances = *draw.fInstanceData;
             memcpy(&indexStorage[idx], instances.indices(), instances.count() * sizeof(uint16_t));
             pre_translate_transform_values(instances.transformValues(), this->transformType(),
                                            instances.count(),
                                            draw.fX - head.fX, draw.fY - head.fY,
                                            &transformStorage[floatsPerTransform * idx]);
             idx += instances.count();
 
             // TODO: Support mismatched transform types if we start using more types other than 2D.
             SkASSERT(instances.transformType() == this->transformType());
         }
         SkASSERT(idx == fTotalPathCount);
 
-        state->gpu()->pathRendering()->drawPaths(args, fPathRange.get(), indexStorage,
-                                                 GrPathRange::kU16_PathIndexType, transformStorage,
-                                                 this->transformType(), fTotalPathCount);
+        state->gpu()->pathRendering()->drawPaths(*this->pipeline(),
+                                                 *pathProc,
+                                                 this->stencilSettings(),
+                                                 fPathRange.get(),
+                                                 indexStorage,
+                                                 GrPathRange::kU16_PathIndexType,
+                                                 transformStorage,
+                                                 this->transformType(),
+                                                 fTotalPathCount);
     }
 }
 
 inline void pre_translate_transform_values(const float* xforms,
                                            GrPathRendering::PathTransformType type, int count,
                                            SkScalar x, SkScalar y, float* dst) {
     if (0 == x && 0 == y) {
         memcpy(dst, xforms, count * GrPathRendering::PathTransformSize(type) * sizeof(float));
         return;
     }
@@ skipping 27 matching lines @@
                 dst[i + 3] = xforms[i + 3];
                 dst[i + 4] = xforms[i + 4];
                 dst[i + 5] = xforms[i + 3] * x + xforms[i + 4] * y + xforms[i + 5];
             }
             break;
         default:
             SkFAIL("Unknown transform type.");
             break;
     }
 }