1/* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8#include "gm/gm.h" 9#include "include/core/SkCanvas.h" 10#include "include/core/SkColor.h" 11#include "include/core/SkImage.h" 12#include "include/core/SkPaint.h" 13#include "include/core/SkPath.h" 14#include "include/core/SkRect.h" 15#include "include/core/SkRefCnt.h" 16#include "include/core/SkScalar.h" 17#include "include/core/SkShader.h" 18#include "include/core/SkSize.h" 19#include "include/core/SkString.h" 20#include "include/core/SkSurface.h" 21 22namespace skiagm { 23 24constexpr SkRect kSrcImageClip{75, 75, 275, 275}; 25 26/* 27 * The purpose of this test is to exercise all three codepaths in skgpu::v1::SurfaceDrawContext 28 * (drawFilledRect, fillRectToRect, fillRectWithLocalMatrix) that pre-crop filled rects based on the 29 * clip. 30 * 31 * The test creates an image of a green square surrounded by red background, then draws this image 32 * in various ways with the red clipped out. The test is successful if there is no visible red 33 * background, scissor is never used, and ideally, all the rectangles draw in one GrDrawOp. 34 */ 35class CroppedRectsGM : public GM { 36private: 37 SkString onShortName() final { return SkString("croppedrects"); } 38 SkISize onISize() override { return SkISize::Make(500, 500); } 39 40 void onOnceBeforeDraw() override { 41 sk_sp<SkSurface> srcSurface = SkSurface::MakeRasterN32Premul(500, 500); 42 SkCanvas* srcCanvas = srcSurface->getCanvas(); 43 44 srcCanvas->clear(SK_ColorRED); 45 46 SkPaint paint; 47 paint.setColor(0xff00ff00); 48 srcCanvas->drawRect(kSrcImageClip, paint); 49 50 constexpr SkScalar kStrokeWidth = 10; 51 SkPaint stroke; 52 stroke.setStyle(SkPaint::kStroke_Style); 53 stroke.setStrokeWidth(kStrokeWidth); 54 stroke.setColor(0xff008800); 55 srcCanvas->drawRect(kSrcImageClip.makeInset(kStrokeWidth / 2, kStrokeWidth / 2), stroke); 56 57 fSrcImage = srcSurface->makeImageSnapshot(); 58 fSrcImageShader = fSrcImage->makeShader(SkSamplingOptions()); 59 } 60 61 void onDraw(SkCanvas* canvas) override { 62 canvas->clear(SK_ColorWHITE); 63 64 { 65 // skgpu::v1::SurfaceDrawContext::drawFilledRect. 66 SkAutoCanvasRestore acr(canvas, true); 67 SkPaint paint; 68 paint.setShader(fSrcImageShader); 69 canvas->clipRect(kSrcImageClip); 70 canvas->drawPaint(paint); 71 } 72 73 { 74 // skgpu::v1::SurfaceDrawContext::fillRectToRect. 75 SkAutoCanvasRestore acr(canvas, true); 76 SkRect drawRect = SkRect::MakeXYWH(350, 100, 100, 300); 77 canvas->clipRect(drawRect); 78 canvas->drawImageRect(fSrcImage.get(), 79 kSrcImageClip.makeOutset(0.5f * kSrcImageClip.width(), 80 kSrcImageClip.height()), 81 drawRect.makeOutset(0.5f * drawRect.width(), drawRect.height()), 82 SkSamplingOptions(), nullptr, 83 SkCanvas::kStrict_SrcRectConstraint); 84 } 85 86 { 87 // skgpu::v1::SurfaceDrawContext::fillRectWithLocalMatrix. 88 SkAutoCanvasRestore acr(canvas, true); 89 SkPath path = SkPath::Line( 90 {kSrcImageClip.fLeft - kSrcImageClip.width(), kSrcImageClip.centerY()}, 91 {kSrcImageClip.fRight + 3 * kSrcImageClip.width(), kSrcImageClip.centerY()}); 92 SkPaint paint; 93 paint.setStyle(SkPaint::kStroke_Style); 94 paint.setStrokeWidth(2 * kSrcImageClip.height()); 95 paint.setShader(fSrcImageShader); 96 canvas->translate(23, 301); 97 canvas->scale(300 / kSrcImageClip.width(), 100 / kSrcImageClip.height()); 98 canvas->translate(-kSrcImageClip.left(), -kSrcImageClip.top()); 99 canvas->clipRect(kSrcImageClip); 100 canvas->drawPath(path, paint); 101 } 102 103 // TODO: assert the draw target only has one op in the post-MDB world. 104 } 105 106 sk_sp<SkImage> fSrcImage; 107 sk_sp<SkShader> fSrcImageShader; 108 109 using INHERITED = GM; 110}; 111 112DEF_GM( return new CroppedRectsGM(); ) 113 114} // namespace skiagm 115