1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9 #include "SampleCode.h"
10 #include "SkView.h"
11 #include "SkCanvas.h"
12 #include "SkAAClip.h"
13
testop(const SkIRect & r0,const SkIRect & r1,SkRegion::Op op,const SkIRect & expectedR)14 static void testop(const SkIRect& r0, const SkIRect& r1, SkRegion::Op op,
15 const SkIRect& expectedR) {
16 SkAAClip c0, c1, c2;
17 c0.setRect(r0);
18 c1.setRect(r1);
19 c2.op(c0, c1, op);
20
21 SkIRect r2 = c2.getBounds();
22 SkASSERT(r2 == expectedR);
23 }
24
25 static const struct {
26 SkIRect r0;
27 SkIRect r1;
28 SkRegion::Op op;
29 SkIRect expectedR;
30 } gRec[] = {
31 {{ 1, 2, 9, 3 }, { -3, 2, 5, 11 }, SkRegion::kDifference_Op, { 5, 2, 9, 3 }},
32 {{ 1, 10, 5, 13 }, { 1, 2, 5, 11 }, SkRegion::kDifference_Op, { 1, 11, 5, 13 }},
33 {{ 1, 10, 5, 13 }, { 1, 2, 5, 11 }, SkRegion::kReverseDifference_Op, { 1, 2, 5, 10 }},
34 };
35
testop()36 static void testop() {
37 for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
38 testop(gRec[i].r0, gRec[i].r1, gRec[i].op, gRec[i].expectedR);
39 }
40 }
41
drawClip(SkCanvas * canvas,const SkAAClip & clip)42 static void drawClip(SkCanvas* canvas, const SkAAClip& clip) {
43 SkMask mask;
44 SkBitmap bm;
45
46 clip.copyToMask(&mask);
47 SkAutoMaskFreeImage amfi(mask.fImage);
48
49 bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(),
50 mask.fBounds.height(), mask.fRowBytes);
51 bm.setPixels(mask.fImage);
52
53 SkPaint paint;
54 canvas->drawBitmap(bm,
55 SK_Scalar1 * mask.fBounds.fLeft,
56 SK_Scalar1 * mask.fBounds.fTop,
57 &paint);
58 }
59
60 class AAClipView : public SampleView {
61 public:
AAClipView()62 AAClipView() {
63 testop();
64 }
65
66 protected:
67 // overrides from SkEventSink
onQuery(SkEvent * evt)68 virtual bool onQuery(SkEvent* evt) {
69 if (SampleCode::TitleQ(*evt)) {
70 SampleCode::TitleR(evt, "AAClip");
71 return true;
72 }
73 return this->INHERITED::onQuery(evt);
74 }
75
onDrawContent(SkCanvas * canvas)76 virtual void onDrawContent(SkCanvas* canvas) {
77 #if 1
78 SkAAClip aaclip;
79 SkPath path;
80 SkRect bounds;
81
82 bounds.set(0, 0, 20, 20);
83 bounds.inset(SK_ScalarHalf, SK_ScalarHalf);
84
85 // path.addRect(bounds);
86 // path.addOval(bounds);
87 path.addRoundRect(bounds, 4, 4);
88 aaclip.setPath(path);
89 canvas->translate(30, 30);
90 drawClip(canvas, aaclip);
91
92 SkAAClip aaclip2;
93 path.offset(10, 10);
94 aaclip2.setPath(path);
95 canvas->translate(30, 0);
96 drawClip(canvas, aaclip2);
97
98 SkAAClip aaclip3;
99 aaclip3.op(aaclip, aaclip2, SkRegion::kIntersect_Op);
100 canvas->translate(30, 0);
101 drawClip(canvas, aaclip3);
102
103 #endif
104
105 #if 0
106 SkRect r;
107 r.set(0, 0, this->width(), this->height());
108 r.inset(20, 20);
109 canvas->clipRect(r);
110
111 SkPath path;
112 path.addRect(r);
113 SkPaint paint;
114 paint.setAntiAlias(true);
115 paint.setColor(SK_ColorRED);
116 canvas->drawPath(path, paint);
117 #endif
118 }
119
120 private:
121 typedef SkView INHERITED;
122 };
123
124 //////////////////////////////////////////////////////////////////////////////
125
MyFactory()126 static SkView* MyFactory() { return new AAClipView; }
127 static SkViewRegister reg(MyFactory);
128
129