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/SkClipOp.h"
11 #include "include/core/SkColorSpace.h"
12 #include "include/core/SkImageInfo.h"
13 #include "include/core/SkMatrix.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkPoint.h"
16 #include "include/core/SkRRect.h"
17 #include "include/core/SkRect.h"
18 #include "include/core/SkRefCnt.h"
19 #include "include/core/SkRegion.h"
20 #include "include/core/SkSize.h"
21 #include "include/core/SkString.h"
22 #include "include/core/SkTypes.h"
23 #include "include/private/SkColorData.h"
24 #include "src/core/SkCanvasPriv.h"
25 #include "src/core/SkClipStack.h"
26 #include "tools/ToolUtils.h"
27
28 #include <utility>
29
30 constexpr static SkIRect kDeviceRect = {0, 0, 600, 600};
31 constexpr static SkIRect kCoverRect = {50, 50, 550, 550};
32
33 namespace skiagm {
34
35 ////////////////////////////////////////////////////////////////////////////////////////////////////
36
37 /**
38 * Draws a clip that will exercise window rectangles if they are supported.
39 */
40 class WindowRectanglesGM : public GM {
41 private:
42 DrawResult coverClipStack(const SkClipStack&, SkCanvas*, SkString* errorMsg);
43
getISize()44 SkISize getISize() override { return SkISize::Make(kDeviceRect.width(), kDeviceRect.height()); }
getName() const45 SkString getName() const override { return SkString("windowrectangles"); }
46 DrawResult onDraw(SkCanvas*, SkString* errorMsg) override;
47 };
48
coverClipStack(const SkClipStack & stack,SkCanvas * canvas,SkString * errorMsg)49 DrawResult WindowRectanglesGM::coverClipStack(const SkClipStack& stack, SkCanvas* canvas,
50 SkString* errorMsg) {
51 SkPaint paint;
52 paint.setColor(0xff00aa80);
53
54 // Set up the canvas's clip to match our SkClipStack.
55 SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart);
56 for (const SkClipStack::Element* element = iter.next(); element; element = iter.next()) {
57 SkASSERT(!element->isReplaceOp());
58 SkClipOp op = element->getOp();
59 bool isAA = element->isAA();
60 switch (element->getDeviceSpaceType()) {
61 case SkClipStack::Element::DeviceSpaceType::kShader:
62 canvas->clipShader(element->refShader(), op);
63 break;
64 case SkClipStack::Element::DeviceSpaceType::kPath:
65 canvas->clipPath(element->getDeviceSpacePath(), op, isAA);
66 break;
67 case SkClipStack::Element::DeviceSpaceType::kRRect:
68 canvas->clipRRect(element->getDeviceSpaceRRect(), op, isAA);
69 break;
70 case SkClipStack::Element::DeviceSpaceType::kRect:
71 canvas->clipRect(element->getDeviceSpaceRect(), op, isAA);
72 break;
73 case SkClipStack::Element::DeviceSpaceType::kEmpty:
74 canvas->clipRect({ 0, 0, 0, 0 }, SkClipOp::kIntersect, false);
75 break;
76 }
77 }
78
79 canvas->drawRect(SkRect::Make(kCoverRect), paint);
80 return DrawResult::kOk;
81 }
82
onDraw(SkCanvas * canvas,SkString * errorMsg)83 DrawResult WindowRectanglesGM::onDraw(SkCanvas* canvas, SkString* errorMsg) {
84 ToolUtils::draw_checkerboard(canvas, 0xffffffff, 0xffc6c3c6, 25);
85 SkClipStack stack;
86 stack.clipRect(SkRect::MakeXYWH(370.75, 80.25, 149, 100), SkMatrix::I(),
87 SkClipOp::kDifference, false);
88 stack.clipRect(SkRect::MakeXYWH(80.25, 420.75, 150, 100), SkMatrix::I(),
89 SkClipOp::kDifference, true);
90 stack.clipRRect(SkRRect::MakeRectXY(SkRect::MakeXYWH(200, 200, 200, 200), 60, 45),
91 SkMatrix::I(), SkClipOp::kDifference, true);
92
93 SkRRect nine;
94 nine.setNinePatch(SkRect::MakeXYWH(550 - 30.25 - 100, 370.75, 100, 150), 12, 35, 23, 20);
95 stack.clipRRect(nine, SkMatrix::I(), SkClipOp::kDifference, true);
96
97 SkRRect complx;
98 SkVector complxRadii[4] = {{6, 4}, {8, 12}, {16, 24}, {48, 32}};
99 complx.setRectRadii(SkRect::MakeXYWH(80.25, 80.75, 100, 149), complxRadii);
100 stack.clipRRect(complx, SkMatrix::I(), SkClipOp::kDifference, false);
101
102 return this->coverClipStack(stack, canvas, errorMsg);
103 }
104
105 DEF_GM( return new WindowRectanglesGM(); )
106 } // namespace skiagm
107