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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkRRect.h"
#include "SkSurface.h"
namespace skiagm {
constexpr SkRect kSrcImageClip{75, 75, 275, 275};
/*
* The purpose of this test is to exercise all three codepaths in GrRenderTargetContext
* (drawFilledRect, fillRectToRect, fillRectWithLocalMatrix) that pre-crop filled rects based on the
* clip.
*
* The test creates an image of a green square surrounded by red background, then draws this image
* in various ways with the red clipped out. The test is successful if there is no visible red
* background, scissor is never used, and ideally, all the rectangles draw in one GrDrawOp.
*/
class CroppedRectsGM : public GM {
private:
SkString onShortName() override final { return SkString("croppedrects"); }
SkISize onISize() override { return SkISize::Make(500, 500); }
void onOnceBeforeDraw() override {
sk_sp<SkSurface> srcSurface = SkSurface::MakeRasterN32Premul(500, 500);
SkCanvas* srcCanvas = srcSurface->getCanvas();
srcCanvas->clear(SK_ColorRED);
SkPaint paint;
paint.setColor(0xff00ff00);
srcCanvas->drawRect(kSrcImageClip, paint);
constexpr SkScalar kStrokeWidth = 10;
SkPaint stroke;
stroke.setStyle(SkPaint::kStroke_Style);
stroke.setStrokeWidth(kStrokeWidth);
stroke.setColor(0xff008800);
srcCanvas->drawRect(kSrcImageClip.makeInset(kStrokeWidth / 2, kStrokeWidth / 2), stroke);
fSrcImage = srcSurface->makeImageSnapshot();
fSrcImageShader = fSrcImage->makeShader();
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorWHITE);
{
// GrRenderTargetContext::drawFilledRect.
SkAutoCanvasRestore acr(canvas, true);
SkPaint paint;
paint.setShader(fSrcImageShader);
paint.setFilterQuality(kNone_SkFilterQuality);
canvas->clipRect(kSrcImageClip);
canvas->drawPaint(paint);
}
{
// GrRenderTargetContext::fillRectToRect.
SkAutoCanvasRestore acr(canvas, true);
SkPaint paint;
paint.setFilterQuality(kNone_SkFilterQuality);
SkRect drawRect = SkRect::MakeXYWH(350, 100, 100, 300);
canvas->clipRect(drawRect);
canvas->drawImageRect(fSrcImage.get(),
kSrcImageClip.makeOutset(0.5f * kSrcImageClip.width(),
kSrcImageClip.height()),
drawRect.makeOutset(0.5f * drawRect.width(), drawRect.height()),
&paint);
}
{
// GrRenderTargetContext::fillRectWithLocalMatrix.
SkAutoCanvasRestore acr(canvas, true);
SkPath path;
path.moveTo(kSrcImageClip.fLeft - kSrcImageClip.width(), kSrcImageClip.centerY());
path.lineTo(kSrcImageClip.fRight + 3 * kSrcImageClip.width(), kSrcImageClip.centerY());
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(2 * kSrcImageClip.height());
paint.setShader(fSrcImageShader);
paint.setFilterQuality(kNone_SkFilterQuality);
canvas->translate(23, 301);
canvas->scale(300 / kSrcImageClip.width(), 100 / kSrcImageClip.height());
canvas->translate(-kSrcImageClip.left(), -kSrcImageClip.top());
canvas->clipRect(kSrcImageClip);
canvas->drawPath(path, paint);
}
// TODO: assert the draw target only has one op in the post-MDB world.
}
sk_sp<SkImage> fSrcImage;
sk_sp<SkShader> fSrcImageShader;
typedef GM INHERITED;
};
DEF_GM( return new CroppedRectsGM(); )
}
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