GPU implementation of drawArc.

src/gpu/GrDrawContext.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 "GrBatchTest.h"
 #include "GrColor.h"
 #include "GrDrawContext.h"
@@ skipping 979 matching lines @@
             return;
         }
     }
 
     SkPath path;
     path.setIsVolatile(true);
     path.addOval(oval);
     this->internalDrawPath(clip, paint, viewMatrix, path, style);
 }
 
+void GrDrawContext::drawArc(const GrClip& clip,
+                            const GrPaint& paint,
+                            const SkMatrix& viewMatrix,
+                            const SkRect& oval,
+                            SkScalar startAngle,
+                            SkScalar sweepAngle,
+                            bool useCenter,
+                            const GrStyle& style) {
+    bool useHWAA;
+    if (should_apply_coverage_aa(paint, fRenderTarget.get(), &useHWAA)) {
+        GrShaderCaps* shaderCaps = fContext->caps()->shaderCaps();
+        SkAutoTUnref<GrDrawBatch> batch(GrOvalRenderer::CreateArcBatch(paint.getColor(),
+                                                                       viewMatrix,
+                                                                       oval,
+                                                                       startAngle,
+                                                                       sweepAngle,
+                                                                       useCenter,
+                                                                       style,
+                                                                       shaderCaps));
+        if (batch) {
+            GrPipelineBuilder pipelineBuilder(paint, useHWAA);
+            this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+            return;
+        }
+    }
+    SkPath path;
+    path.setIsVolatile(true);
+    if (useCenter) {
+        path.moveTo(oval.centerX(), oval.centerY());
+    }
+    path.arcTo(oval, startAngle, sweepAngle, !useCenter);
+    if (useCenter) {
+        path.close();
+    }
+    this->internalDrawPath(clip, paint, viewMatrix, path, style);
+    return;
+}
+
 void GrDrawContext::drawImageLattice(const GrClip& clip,
                                      const GrPaint& paint,
                                      const SkMatrix& viewMatrix,
                                      int imageWidth,
                                      int imageHeight,
                                      std::unique_ptr<SkLatticeIter> iter,
                                      const SkRect& dst) {
     ASSERT_SINGLE_OWNER
     RETURN_IF_ABANDONED
     SkDEBUGCODE(this->validate();)
@@ skipping 297 matching lines @@
 
 void GrDrawContext::drawBatch(const GrPipelineBuilder& pipelineBuilder, const GrClip& clip,
                               GrDrawBatch* batch) {
     ASSERT_SINGLE_OWNER
     RETURN_IF_ABANDONED
     SkDEBUGCODE(this->validate();)
     GR_AUDIT_TRAIL_AUTO_FRAME(fAuditTrail, "GrDrawContext::drawBatch");
 
     this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
 }