| /* |
| * 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(SkBudgeted::kYes); |
| fSrcImageShader = fSrcImage->makeShader(SkShader::kClamp_TileMode, |
| SkShader::kClamp_TileMode); |
| } |
| |
| 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(-90, 263); |
| canvas->scale(300 / kSrcImageClip.width(), 100 / kSrcImageClip.height()); |
| 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(); ) |
| |
| } |