294 lines
9.3 KiB
C++
294 lines
9.3 KiB
C++
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/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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// This test only works with the GPU backend.
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#include "gm.h"
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#if SK_SUPPORT_GPU
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#include "GrBatchTarget.h"
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#include "GrBufferAllocPool.h"
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#include "GrContext.h"
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#include "GrDefaultGeoProcFactory.h"
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#include "GrPathUtils.h"
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#include "GrTest.h"
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#include "GrTestBatch.h"
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#include "SkColorPriv.h"
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#include "SkDevice.h"
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#include "SkGeometry.h"
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#include "SkTLList.h"
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#include "effects/GrConvexPolyEffect.h"
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namespace skiagm {
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class ConvexPolyTestBatch : public GrTestBatch {
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public:
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struct Geometry : public GrTestBatch::Geometry {
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SkRect fBounds;
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};
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const char* name() const SK_OVERRIDE { return "ConvexPolyTestBatch"; }
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static GrBatch* Create(const GrGeometryProcessor* gp, const Geometry& geo) {
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return SkNEW_ARGS(ConvexPolyTestBatch, (gp, geo));
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}
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private:
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ConvexPolyTestBatch(const GrGeometryProcessor* gp, const Geometry& geo)
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: INHERITED(gp)
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, fGeometry(geo) {
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}
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Geometry* geoData(int index) SK_OVERRIDE {
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SkASSERT(0 == index);
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return &fGeometry;
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}
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void onGenerateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) SK_OVERRIDE {
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size_t vertexStride = this->geometryProcessor()->getVertexStride();
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const GrVertexBuffer* vertexBuffer;
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int firstVertex;
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void* vertices = batchTarget->vertexPool()->makeSpace(vertexStride,
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kVertsPerCubic,
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&vertexBuffer,
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&firstVertex);
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if (!vertices || !batchTarget->quadIndexBuffer()) {
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SkDebugf("Could not allocate buffers\n");
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return;
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}
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SkASSERT(vertexStride == sizeof(SkPoint));
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SkPoint* verts = reinterpret_cast<SkPoint*>(vertices);
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// Make sure any artifacts around the exterior of path are visible by using overly
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// conservative bounding geometry.
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fGeometry.fBounds.outset(5.f, 5.f);
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fGeometry.fBounds.toQuad(verts);
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GrDrawTarget::DrawInfo drawInfo;
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drawInfo.setPrimitiveType(kTriangleFan_GrPrimitiveType);
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drawInfo.setVertexBuffer(vertexBuffer);
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drawInfo.setStartVertex(firstVertex);
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drawInfo.setVertexCount(kVertsPerCubic);
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drawInfo.setStartIndex(0);
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drawInfo.setIndexCount(kIndicesPerCubic);
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drawInfo.setIndexBuffer(batchTarget->quadIndexBuffer());
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batchTarget->draw(drawInfo);
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}
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Geometry fGeometry;
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static const int kVertsPerCubic = 4;
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static const int kIndicesPerCubic = 6;
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typedef GrTestBatch INHERITED;
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};
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/**
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* This GM directly exercises a GrProcessor that draws convex polygons.
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*/
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class ConvexPolyEffect : public GM {
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public:
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ConvexPolyEffect() {
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this->setBGColor(0xFFFFFFFF);
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}
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protected:
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SkString onShortName() SK_OVERRIDE {
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return SkString("convex_poly_effect");
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}
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SkISize onISize() SK_OVERRIDE {
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return SkISize::Make(720, 800);
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}
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void onOnceBeforeDraw() SK_OVERRIDE {
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SkPath tri;
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tri.moveTo(5.f, 5.f);
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tri.lineTo(100.f, 20.f);
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tri.lineTo(15.f, 100.f);
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fPaths.addToTail(tri);
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fPaths.addToTail(SkPath())->reverseAddPath(tri);
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tri.close();
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fPaths.addToTail(tri);
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SkPath ngon;
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static const SkScalar kRadius = 50.f;
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const SkPoint center = { kRadius, kRadius };
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for (int i = 0; i < GrConvexPolyEffect::kMaxEdges; ++i) {
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SkScalar angle = 2 * SK_ScalarPI * i / GrConvexPolyEffect::kMaxEdges;
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SkPoint point;
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point.fY = SkScalarSinCos(angle, &point.fX);
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point.scale(kRadius);
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point = center + point;
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if (0 == i) {
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ngon.moveTo(point);
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} else {
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ngon.lineTo(point);
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}
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}
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fPaths.addToTail(ngon);
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SkMatrix scaleM;
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scaleM.setScale(1.1f, 0.4f);
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ngon.transform(scaleM);
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fPaths.addToTail(ngon);
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// integer edges
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fRects.addToTail(SkRect::MakeLTRB(5.f, 1.f, 30.f, 25.f));
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// half-integer edges
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fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 24.5f));
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// vertically/horizontally thin rects that cover pixel centers
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fRects.addToTail(SkRect::MakeLTRB(5.25f, 0.5f, 5.75f, 24.5f));
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fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 0.75f));
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// vertically/horizontally thin rects that don't cover pixel centers
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fRects.addToTail(SkRect::MakeLTRB(5.55f, 0.5f, 5.75f, 24.5f));
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fRects.addToTail(SkRect::MakeLTRB(5.5f, .05f, 29.5f, .25f));
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// small in x and y
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fRects.addToTail(SkRect::MakeLTRB(5.05f, .55f, 5.45f, .85f));
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// inverted in x and y
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fRects.addToTail(SkRect::MakeLTRB(100.f, 50.5f, 5.f, 0.5f));
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}
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void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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GrRenderTarget* rt = canvas->internal_private_accessTopLayerRenderTarget();
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if (NULL == rt) {
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this->drawGpuOnlyMessage(canvas);
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return;
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}
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GrContext* context = rt->getContext();
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if (NULL == context) {
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return;
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}
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SkAutoTUnref<const GrGeometryProcessor> gp(
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GrDefaultGeoProcFactory::Create(GrDefaultGeoProcFactory::kPosition_GPType,
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0xff000000));
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SkScalar y = 0;
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for (SkTLList<SkPath>::Iter iter(fPaths, SkTLList<SkPath>::Iter::kHead_IterStart);
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iter.get();
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iter.next()) {
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const SkPath* path = iter.get();
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SkScalar x = 0;
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for (int et = 0; et < kGrProcessorEdgeTypeCnt; ++et) {
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GrTestTarget tt;
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context->getTestTarget(&tt);
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if (NULL == tt.target()) {
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SkDEBUGFAIL("Couldn't get Gr test target.");
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return;
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}
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SkMatrix m;
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SkPath p;
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m.setTranslate(x, y);
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path->transform(m, &p);
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GrPrimitiveEdgeType edgeType = (GrPrimitiveEdgeType) et;
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SkAutoTUnref<GrFragmentProcessor> fp(GrConvexPolyEffect::Create(edgeType, p));
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if (!fp) {
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continue;
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}
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GrPipelineBuilder pipelineBuilder;
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pipelineBuilder.addCoverageProcessor(fp);
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pipelineBuilder.setRenderTarget(rt);
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ConvexPolyTestBatch::Geometry geometry;
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geometry.fColor = gp->color();
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geometry.fBounds = p.getBounds();
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SkAutoTUnref<GrBatch> batch(ConvexPolyTestBatch::Create(gp, geometry));
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tt.target()->drawBatch(&pipelineBuilder, batch, NULL);
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x += SkScalarCeilToScalar(path->getBounds().width() + 10.f);
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}
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// Draw AA and non AA paths using normal API for reference.
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canvas->save();
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canvas->translate(x, y);
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SkPaint paint;
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canvas->drawPath(*path, paint);
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canvas->translate(path->getBounds().width() + 10.f, 0);
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paint.setAntiAlias(true);
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canvas->drawPath(*path, paint);
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canvas->restore();
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y += SkScalarCeilToScalar(path->getBounds().height() + 20.f);
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}
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for (SkTLList<SkRect>::Iter iter(fRects, SkTLList<SkRect>::Iter::kHead_IterStart);
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iter.get();
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iter.next()) {
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SkScalar x = 0;
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for (int et = 0; et < kGrProcessorEdgeTypeCnt; ++et) {
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GrTestTarget tt;
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context->getTestTarget(&tt);
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if (NULL == tt.target()) {
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SkDEBUGFAIL("Couldn't get Gr test target.");
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return;
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}
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SkRect rect = *iter.get();
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rect.offset(x, y);
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GrPrimitiveEdgeType edgeType = (GrPrimitiveEdgeType) et;
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SkAutoTUnref<GrFragmentProcessor> fp(GrConvexPolyEffect::Create(edgeType, rect));
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if (!fp) {
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continue;
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}
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GrPipelineBuilder pipelineBuilder;
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pipelineBuilder.addCoverageProcessor(fp);
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pipelineBuilder.setRenderTarget(rt);
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ConvexPolyTestBatch::Geometry geometry;
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geometry.fColor = gp->color();
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geometry.fBounds = rect;
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SkAutoTUnref<GrBatch> batch(ConvexPolyTestBatch::Create(gp, geometry));
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tt.target()->drawBatch(&pipelineBuilder, batch, NULL);
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x += SkScalarCeilToScalar(rect.width() + 10.f);
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}
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// Draw rect without and with AA using normal API for reference
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canvas->save();
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canvas->translate(x, y);
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SkPaint paint;
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canvas->drawRect(*iter.get(), paint);
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x += SkScalarCeilToScalar(iter.get()->width() + 10.f);
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paint.setAntiAlias(true);
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canvas->drawRect(*iter.get(), paint);
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canvas->restore();
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y += SkScalarCeilToScalar(iter.get()->height() + 20.f);
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}
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}
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private:
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SkTLList<SkPath> fPaths;
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SkTLList<SkRect> fRects;
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typedef GM INHERITED;
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};
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DEF_GM( return SkNEW(ConvexPolyEffect); )
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}
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#endif
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