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 #include "tools/GpuToolUtils.h"
22 #include "tools/ToolUtils.h"
23
24 namespace skiagm {
25
26 constexpr SkRect kSrcImageClip{75, 75, 275, 275};
27
create_image(SkCanvas * destCanvas)28 static sk_sp<SkImage> create_image(SkCanvas* destCanvas) {
29 sk_sp<SkSurface> srcSurface = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(500, 500));
30 SkCanvas* srcCanvas = srcSurface->getCanvas();
31
32 srcCanvas->clear(SK_ColorRED);
33
34 SkPaint paint;
35 paint.setColor(0xff00ff00);
36 srcCanvas->drawRect(kSrcImageClip, paint);
37
38 constexpr SkScalar kStrokeWidth = 10;
39 SkPaint stroke;
40 stroke.setStyle(SkPaint::kStroke_Style);
41 stroke.setStrokeWidth(kStrokeWidth);
42 stroke.setColor(0xff008800);
43 srcCanvas->drawRect(kSrcImageClip.makeInset(kStrokeWidth / 2, kStrokeWidth / 2), stroke);
44
45 return ToolUtils::MakeTextureImage(destCanvas, srcSurface->makeImageSnapshot());
46 }
47
48 /*
49 * The purpose of this test is to exercise all three codepaths in skgpu::ganesh::SurfaceDrawContext
50 * (drawFilledRect, fillRectToRect, fillRectWithLocalMatrix) that pre-crop filled rects based on the
51 * clip.
52 *
53 * The test creates an image of a green square surrounded by red background, then draws this image
54 * in various ways with the red clipped out. The test is successful if there is no visible red
55 * background, scissor is never used, and ideally, all the rectangles draw in one GrDrawOp.
56 */
57 class CroppedRectsGM : public GM {
58 private:
getName() const59 SkString getName() const override { return SkString("croppedrects"); }
getISize()60 SkISize getISize() override { return SkISize::Make(500, 500); }
61
onDraw(SkCanvas * canvas)62 void onDraw(SkCanvas* canvas) override {
63 if (!fSrcImage) {
64 fSrcImage = create_image(canvas);
65 if (fSrcImage) {
66 fSrcImageShader = fSrcImage->makeShader(SkSamplingOptions());
67 }
68 }
69
70 canvas->clear(SK_ColorWHITE);
71
72 {
73 // skgpu::ganesh::SurfaceDrawContext::drawFilledRect.
74 SkAutoCanvasRestore acr(canvas, true);
75 SkPaint paint;
76 paint.setShader(fSrcImageShader);
77 canvas->clipRect(kSrcImageClip);
78 canvas->drawPaint(paint);
79 }
80
81 {
82 // skgpu::ganesh::SurfaceDrawContext::fillRectToRect.
83 SkAutoCanvasRestore acr(canvas, true);
84 SkRect drawRect = SkRect::MakeXYWH(350, 100, 100, 300);
85 canvas->clipRect(drawRect);
86 canvas->drawImageRect(fSrcImage.get(),
87 kSrcImageClip.makeOutset(0.5f * kSrcImageClip.width(),
88 kSrcImageClip.height()),
89 drawRect.makeOutset(0.5f * drawRect.width(), drawRect.height()),
90 SkSamplingOptions(), nullptr,
91 SkCanvas::kStrict_SrcRectConstraint);
92 }
93
94 {
95 // skgpu::ganesh::SurfaceDrawContext::fillRectWithLocalMatrix.
96 SkAutoCanvasRestore acr(canvas, true);
97 SkPath path = SkPath::Line(
98 {kSrcImageClip.fLeft - kSrcImageClip.width(), kSrcImageClip.centerY()},
99 {kSrcImageClip.fRight + 3 * kSrcImageClip.width(), kSrcImageClip.centerY()});
100 SkPaint paint;
101 paint.setStyle(SkPaint::kStroke_Style);
102 paint.setStrokeWidth(2 * kSrcImageClip.height());
103 paint.setShader(fSrcImageShader);
104 canvas->translate(23, 301);
105 canvas->scale(300 / kSrcImageClip.width(), 100 / kSrcImageClip.height());
106 canvas->translate(-kSrcImageClip.left(), -kSrcImageClip.top());
107 canvas->clipRect(kSrcImageClip);
108 canvas->drawPath(path, paint);
109 }
110
111 // TODO: assert the draw target only has one op in the post-MDB world.
112 }
113
114 sk_sp<SkImage> fSrcImage;
115 sk_sp<SkShader> fSrcImageShader;
116
117 using INHERITED = GM;
118 };
119
120 DEF_GM( return new CroppedRectsGM(); )
121
122 } // namespace skiagm
123