cabf4b2f36
BUG=skia: R=egdaniel@google.com, robertphillips@google.com Author: bsalomon@google.com Review URL: https://codereview.chromium.org/183893023 git-svn-id: http://skia.googlecode.com/svn/trunk@13674 2bbb7eff-a529-9590-31e7-b0007b416f81
240 lines
7.8 KiB
C++
240 lines
7.8 KiB
C++
|
|
/*
|
|
* Copyright 2014 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
// This test only works with the GPU backend.
|
|
|
|
#include "gm.h"
|
|
|
|
#if SK_SUPPORT_GPU
|
|
|
|
#include "GrContext.h"
|
|
#include "GrPathUtils.h"
|
|
#include "GrTest.h"
|
|
#include "SkColorPriv.h"
|
|
#include "SkDevice.h"
|
|
#include "SkGeometry.h"
|
|
#include "SkTLList.h"
|
|
|
|
#include "effects/GrConvexPolyEffect.h"
|
|
|
|
namespace {
|
|
extern const GrVertexAttrib kAttribs[] = {
|
|
{kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding},
|
|
};
|
|
}
|
|
|
|
namespace skiagm {
|
|
/**
|
|
* This GM directly exercises a GrEffect that draws convex polygons.
|
|
*/
|
|
class ConvexPolyEffect : public GM {
|
|
public:
|
|
ConvexPolyEffect() {
|
|
this->setBGColor(0xFFFFFFFF);
|
|
}
|
|
|
|
protected:
|
|
virtual SkString onShortName() SK_OVERRIDE {
|
|
return SkString("convex_poly_effect");
|
|
}
|
|
|
|
virtual SkISize onISize() SK_OVERRIDE {
|
|
return make_isize(720, 800);
|
|
}
|
|
|
|
virtual uint32_t onGetFlags() const SK_OVERRIDE {
|
|
// This is a GPU-specific GM.
|
|
return kGPUOnly_Flag;
|
|
}
|
|
|
|
virtual void onOnceBeforeDraw() SK_OVERRIDE {
|
|
SkPath tri;
|
|
tri.moveTo(5.f, 5.f);
|
|
tri.lineTo(100.f, 20.f);
|
|
tri.lineTo(15.f, 100.f);
|
|
|
|
fPaths.addToTail(tri);
|
|
fPaths.addToTail(SkPath())->reverseAddPath(tri);
|
|
|
|
tri.close();
|
|
fPaths.addToTail(tri);
|
|
|
|
SkPath ngon;
|
|
static const SkScalar kRadius = 50.f;
|
|
const SkPoint center = { kRadius, kRadius };
|
|
for (int i = 0; i < GrConvexPolyEffect::kMaxEdges; ++i) {
|
|
SkScalar angle = 2 * SK_ScalarPI * i / GrConvexPolyEffect::kMaxEdges;
|
|
SkPoint point;
|
|
point.fY = SkScalarSinCos(angle, &point.fX);
|
|
point.scale(kRadius);
|
|
point = center + point;
|
|
if (0 == i) {
|
|
ngon.moveTo(point);
|
|
} else {
|
|
ngon.lineTo(point);
|
|
}
|
|
}
|
|
|
|
fPaths.addToTail(ngon);
|
|
SkMatrix scaleM;
|
|
scaleM.setScale(1.1f, 0.4f);
|
|
ngon.transform(scaleM);
|
|
fPaths.addToTail(ngon);
|
|
|
|
// integer edges
|
|
fRects.addToTail(SkRect::MakeLTRB(5.f, 1.f, 30.f, 25.f));
|
|
// half-integer edges
|
|
fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 24.5f));
|
|
// vertically/horizontally thin rects that cover pixel centers
|
|
fRects.addToTail(SkRect::MakeLTRB(5.25f, 0.5f, 5.75f, 24.5f));
|
|
fRects.addToTail(SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 0.75f));
|
|
// vertically/horizontally thin rects that don't cover pixel centers
|
|
fRects.addToTail(SkRect::MakeLTRB(5.55f, 0.5f, 5.75f, 24.5f));
|
|
fRects.addToTail(SkRect::MakeLTRB(5.5f, .05f, 29.5f, .25f));
|
|
// small in x and y
|
|
fRects.addToTail(SkRect::MakeLTRB(5.05f, .55f, 5.45f, .85f));
|
|
// inverted in x and y
|
|
fRects.addToTail(SkRect::MakeLTRB(100.f, 50.5f, 5.f, 0.5f));
|
|
}
|
|
|
|
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
|
|
SkBaseDevice* device = canvas->getTopDevice();
|
|
GrRenderTarget* rt = device->accessRenderTarget();
|
|
if (NULL == rt) {
|
|
return;
|
|
}
|
|
GrContext* context = rt->getContext();
|
|
if (NULL == context) {
|
|
return;
|
|
}
|
|
|
|
SkScalar y = 0;
|
|
for (SkTLList<SkPath>::Iter iter(fPaths, SkTLList<SkPath>::Iter::kHead_IterStart);
|
|
NULL != iter.get();
|
|
iter.next()) {
|
|
const SkPath* path = iter.get();
|
|
SkScalar x = 0;
|
|
|
|
for (int et = 0; et < kGrEffectEdgeTypeCnt; ++et) {
|
|
GrTestTarget tt;
|
|
context->getTestTarget(&tt);
|
|
if (NULL == tt.target()) {
|
|
SkDEBUGFAIL("Couldn't get Gr test target.");
|
|
return;
|
|
}
|
|
GrDrawState* drawState = tt.target()->drawState();
|
|
drawState->setVertexAttribs<kAttribs>(SK_ARRAY_COUNT(kAttribs));
|
|
|
|
SkMatrix m;
|
|
SkPath p;
|
|
m.setTranslate(x, y);
|
|
path->transform(m, &p);
|
|
|
|
GrEffectEdgeType edgeType = (GrEffectEdgeType) et;
|
|
SkAutoTUnref<GrEffectRef> effect(GrConvexPolyEffect::Create(edgeType, p));
|
|
if (!effect) {
|
|
continue;
|
|
}
|
|
drawState->addCoverageEffect(effect, 1);
|
|
drawState->setIdentityViewMatrix();
|
|
drawState->setRenderTarget(rt);
|
|
drawState->setColor(0xff000000);
|
|
|
|
SkPoint verts[4];
|
|
SkRect bounds = p.getBounds();
|
|
// Make sure any artifacts around the exterior of path are visible by using overly
|
|
// conservative bounding geometry.
|
|
bounds.outset(5.f, 5.f);
|
|
bounds.toQuad(verts);
|
|
|
|
tt.target()->setVertexSourceToArray(verts, 4);
|
|
tt.target()->setIndexSourceToBuffer(context->getQuadIndexBuffer());
|
|
tt.target()->drawIndexed(kTriangleFan_GrPrimitiveType, 0, 0, 4, 6);
|
|
|
|
x += SkScalarCeilToScalar(path->getBounds().width() + 10.f);
|
|
}
|
|
|
|
// Draw AA and non AA paths using normal API for reference.
|
|
canvas->save();
|
|
canvas->translate(x, y);
|
|
SkPaint paint;
|
|
canvas->drawPath(*path, paint);
|
|
canvas->translate(path->getBounds().width() + 10.f, 0);
|
|
paint.setAntiAlias(true);
|
|
canvas->drawPath(*path, paint);
|
|
canvas->restore();
|
|
|
|
y += SkScalarCeilToScalar(path->getBounds().height() + 20.f);
|
|
}
|
|
|
|
for (SkTLList<SkRect>::Iter iter(fRects, SkTLList<SkRect>::Iter::kHead_IterStart);
|
|
NULL != iter.get();
|
|
iter.next()) {
|
|
|
|
SkScalar x = 0;
|
|
|
|
for (int et = 0; et < kGrEffectEdgeTypeCnt; ++et) {
|
|
GrTestTarget tt;
|
|
context->getTestTarget(&tt);
|
|
if (NULL == tt.target()) {
|
|
SkDEBUGFAIL("Couldn't get Gr test target.");
|
|
return;
|
|
}
|
|
SkRect rect = *iter.get();
|
|
rect.offset(x, y);
|
|
GrEffectEdgeType edgeType = (GrEffectEdgeType) et;
|
|
SkAutoTUnref<GrEffectRef> effect(GrConvexPolyEffect::Create(edgeType, rect));
|
|
if (!effect) {
|
|
continue;
|
|
}
|
|
|
|
GrDrawState* drawState = tt.target()->drawState();
|
|
drawState->setVertexAttribs<kAttribs>(SK_ARRAY_COUNT(kAttribs));
|
|
drawState->addCoverageEffect(effect, 1);
|
|
drawState->setIdentityViewMatrix();
|
|
drawState->setRenderTarget(rt);
|
|
drawState->setColor(0xff000000);
|
|
|
|
SkPoint verts[4];
|
|
SkRect bounds = rect;
|
|
bounds.outset(5.f, 5.f);
|
|
bounds.toQuad(verts);
|
|
|
|
tt.target()->setVertexSourceToArray(verts, 4);
|
|
tt.target()->setIndexSourceToBuffer(context->getQuadIndexBuffer());
|
|
tt.target()->drawIndexed(kTriangleFan_GrPrimitiveType, 0, 0, 4, 6);
|
|
|
|
x += SkScalarCeilToScalar(rect.width() + 10.f);
|
|
}
|
|
|
|
// Draw rect without and with AA using normal API for reference
|
|
canvas->save();
|
|
canvas->translate(x, y);
|
|
SkPaint paint;
|
|
canvas->drawRect(*iter.get(), paint);
|
|
x += SkScalarCeilToScalar(iter.get()->width() + 10.f);
|
|
paint.setAntiAlias(true);
|
|
canvas->drawRect(*iter.get(), paint);
|
|
canvas->restore();
|
|
|
|
y += SkScalarCeilToScalar(iter.get()->height() + 20.f);
|
|
}
|
|
}
|
|
|
|
private:
|
|
SkTLList<SkPath> fPaths;
|
|
SkTLList<SkRect> fRects;
|
|
|
|
typedef GM INHERITED;
|
|
};
|
|
|
|
DEF_GM( return SkNEW(ConvexPolyEffect); )
|
|
}
|
|
|
|
#endif
|