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/SkFilterQuality.h" 12 #include "include/core/SkImage.h" 13 #include "include/core/SkPaint.h" 14 #include "include/core/SkPath.h" 15 #include "include/core/SkRect.h" 16 #include "include/core/SkRefCnt.h" 17 #include "include/core/SkScalar.h" 18 #include "include/core/SkShader.h" 19 #include "include/core/SkSize.h" 20 #include "include/core/SkString.h" 21 #include "include/core/SkSurface.h" 22 23 namespace skiagm { 24 25 constexpr SkRect kSrcImageClip{75, 75, 275, 275}; 26 27 /* 28 * The purpose of this test is to exercise all three codepaths in GrRenderTargetContext 29 * (drawFilledRect, fillRectToRect, fillRectWithLocalMatrix) that pre-crop filled rects based on the 30 * clip. 31 * 32 * The test creates an image of a green square surrounded by red background, then draws this image 33 * in various ways with the red clipped out. The test is successful if there is no visible red 34 * background, scissor is never used, and ideally, all the rectangles draw in one GrDrawOp. 35 */ 36 class CroppedRectsGM : public GM { 37 private: onShortName()38 SkString onShortName() override final { return SkString("croppedrects"); } onISize()39 SkISize onISize() override { return SkISize::Make(500, 500); } 40 onOnceBeforeDraw()41 void onOnceBeforeDraw() override { 42 sk_sp<SkSurface> srcSurface = SkSurface::MakeRasterN32Premul(500, 500); 43 SkCanvas* srcCanvas = srcSurface->getCanvas(); 44 45 srcCanvas->clear(SK_ColorRED); 46 47 SkPaint paint; 48 paint.setColor(0xff00ff00); 49 srcCanvas->drawRect(kSrcImageClip, paint); 50 51 constexpr SkScalar kStrokeWidth = 10; 52 SkPaint stroke; 53 stroke.setStyle(SkPaint::kStroke_Style); 54 stroke.setStrokeWidth(kStrokeWidth); 55 stroke.setColor(0xff008800); 56 srcCanvas->drawRect(kSrcImageClip.makeInset(kStrokeWidth / 2, kStrokeWidth / 2), stroke); 57 58 fSrcImage = srcSurface->makeImageSnapshot(); 59 fSrcImageShader = fSrcImage->makeShader(); 60 } 61 onDraw(SkCanvas * canvas)62 void onDraw(SkCanvas* canvas) override { 63 canvas->clear(SK_ColorWHITE); 64 65 { 66 // GrRenderTargetContext::drawFilledRect. 67 SkAutoCanvasRestore acr(canvas, true); 68 SkPaint paint; 69 paint.setShader(fSrcImageShader); 70 paint.setFilterQuality(kNone_SkFilterQuality); 71 canvas->clipRect(kSrcImageClip); 72 canvas->drawPaint(paint); 73 } 74 75 { 76 // GrRenderTargetContext::fillRectToRect. 77 SkAutoCanvasRestore acr(canvas, true); 78 SkPaint paint; 79 paint.setFilterQuality(kNone_SkFilterQuality); 80 SkRect drawRect = SkRect::MakeXYWH(350, 100, 100, 300); 81 canvas->clipRect(drawRect); 82 canvas->drawImageRect(fSrcImage.get(), 83 kSrcImageClip.makeOutset(0.5f * kSrcImageClip.width(), 84 kSrcImageClip.height()), 85 drawRect.makeOutset(0.5f * drawRect.width(), drawRect.height()), 86 &paint); 87 } 88 89 { 90 // GrRenderTargetContext::fillRectWithLocalMatrix. 91 SkAutoCanvasRestore acr(canvas, true); 92 SkPath path; 93 path.moveTo(kSrcImageClip.fLeft - kSrcImageClip.width(), kSrcImageClip.centerY()); 94 path.lineTo(kSrcImageClip.fRight + 3 * kSrcImageClip.width(), kSrcImageClip.centerY()); 95 SkPaint paint; 96 paint.setStyle(SkPaint::kStroke_Style); 97 paint.setStrokeWidth(2 * kSrcImageClip.height()); 98 paint.setShader(fSrcImageShader); 99 paint.setFilterQuality(kNone_SkFilterQuality); 100 canvas->translate(23, 301); 101 canvas->scale(300 / kSrcImageClip.width(), 100 / kSrcImageClip.height()); 102 canvas->translate(-kSrcImageClip.left(), -kSrcImageClip.top()); 103 canvas->clipRect(kSrcImageClip); 104 canvas->drawPath(path, paint); 105 } 106 107 // TODO: assert the draw target only has one op in the post-MDB world. 108 } 109 110 sk_sp<SkImage> fSrcImage; 111 sk_sp<SkShader> fSrcImageShader; 112 113 typedef GM INHERITED; 114 }; 115 116 DEF_GM( return new CroppedRectsGM(); ) 117 118 } 119