Restrict query bounds for reduce clip to dev bounds

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 "GrAtlasTextContext.h"
 #include "GrBatchTest.h"
@@ skipping 391 matching lines @@
     // TODO clients should give us bounds
     SkRect bounds;
     if (!bounds.setBoundsCheck(positions, vertexCount)) {
         SkDebugf("drawVertices call empty bounds\n");
         return;
     }
 
     viewMatrix.mapRect(&bounds);
 
     // If we don't have AA then we outset for a half pixel in each direction to account for
-    // snapping
-    if (!paint.isAntiAlias()) {
+    // snapping. We also do this for the "hair" primitive types: lines and points since they have
+    // a 1 pixel thickness in device space.
+    if (!paint.isAntiAlias() || GrIsPrimTypeLines(primitiveType) ||
+        kPoints_GrPrimitiveType == primitiveType) {
         bounds.outset(0.5f, 0.5f);
     }
 
     GrDrawVerticesBatch::Geometry geometry;
     geometry.fColor = paint.getColor();
     SkAutoTUnref<GrDrawBatch> batch(GrDrawVerticesBatch::Create(geometry, primitiveType, viewMatrix,
                                                                 positions, vertexCount, indices,
                                                                 indexCount, colors, texCoords,
                                                                 bounds));
 
@@ skipping 385 matching lines @@
     args.fAntiAlias = useCoverageAA;
     pr->drawPath(args);
 }
 
 void GrDrawContext::drawBatch(GrPipelineBuilder* pipelineBuilder, GrDrawBatch* batch) {
     RETURN_IF_ABANDONED
     SkDEBUGCODE(this->validate();)
 
     this->getDrawTarget()->drawBatch(*pipelineBuilder, batch);
 }