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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 #include "SampleCode.h" | |
9 #include "SkView.h" | |
10 #include "SkCanvas.h" | |
11 | |
12 static const int kILimit = 101; | |
13 static const SkScalar kLimit = SK_Scalar1 * kILimit; | |
14 | |
15 class OvalTestView : public SampleView { | |
16 public: | |
17 SkSize fSize; | |
18 SkPMColor fInsideColor; // signals an interior pixel that was not set | |
19 SkPMColor fOutsideColor; // signals an exterior pixels that was set | |
20 SkBitmap fBitmap; | |
21 | |
22 OvalTestView() { | |
23 fSize.set(SK_Scalar1, SK_Scalar1); | |
24 | |
25 fBitmap.allocN32Pixels(kILimit, kILimit); | |
26 | |
27 fInsideColor = SkPreMultiplyColor(SK_ColorRED); | |
28 fOutsideColor = SkPreMultiplyColor(SK_ColorGREEN); | |
29 | |
30 this->setBGColor(0xFFDDDDDD); | |
31 } | |
32 | |
33 protected: | |
34 // overrides from SkEventSink | |
35 virtual bool onQuery(SkEvent* evt) { | |
36 if (SampleCode::TitleQ(*evt)) { | |
37 SampleCode::TitleR(evt, "OvalTest"); | |
38 return true; | |
39 } | |
40 return this->INHERITED::onQuery(evt); | |
41 } | |
42 | |
43 void drawOval() { | |
44 SkCanvas canvas(fBitmap); | |
45 SkPaint p; | |
46 | |
47 fBitmap.eraseColor(SK_ColorTRANSPARENT); | |
48 canvas.drawOval(SkRect::MakeSize(fSize), p); | |
49 } | |
50 | |
51 int checkOval(int* flatCount, int* buldgeCount) { | |
52 int flatc = 0; | |
53 int buldgec = 0; | |
54 const SkScalar rad = SkScalarHalf(fSize.width()); | |
55 SkScalar cx = SkScalarHalf(fSize.width()); | |
56 SkScalar cy = SkScalarHalf(fSize.height()); | |
57 for (int y = 0; y < kILimit; y++) { | |
58 for (int x = 0; x < kILimit; x++) { | |
59 // measure from pixel centers | |
60 SkScalar px = SkIntToScalar(x) + SK_ScalarHalf; | |
61 SkScalar py = SkIntToScalar(y) + SK_ScalarHalf; | |
62 | |
63 SkPMColor* ptr = fBitmap.getAddr32(x, y); | |
64 SkScalar dist = SkPoint::Length(px - cx, py - cy); | |
65 if (dist <= rad && !*ptr) { | |
66 flatc++; | |
67 *ptr = fInsideColor; | |
68 } else if (dist > rad && *ptr) { | |
69 buldgec++; | |
70 *ptr = fOutsideColor; | |
71 } | |
72 } | |
73 } | |
74 if (flatCount) *flatCount = flatc; | |
75 if (buldgeCount) *buldgeCount = buldgec; | |
76 return flatc + buldgec; | |
77 } | |
78 | |
79 virtual void onDrawContent(SkCanvas* canvas) { | |
80 this->drawOval(); | |
81 int flatCount, buldgeCount; | |
82 this->checkOval(&flatCount, &buldgeCount); | |
83 this->inval(NULL); | |
84 | |
85 canvas->drawBitmap(fBitmap, SkIntToScalar(20), SkIntToScalar(20), NULL); | |
86 | |
87 | |
88 static int gFlatCount; | |
89 static int gBuldgeCount; | |
90 gFlatCount += flatCount; | |
91 gBuldgeCount += buldgeCount; | |
92 | |
93 if (fSize.fWidth < kLimit) { | |
94 SkDebugf("--- width=%g, flat=%d buldge=%d total: flat=%d buldge=%d\n
", fSize.fWidth, | |
95 flatCount, buldgeCount, gFlatCount, gBuldgeCount); | |
96 fSize.fWidth += SK_Scalar1; | |
97 fSize.fHeight += SK_Scalar1; | |
98 } else { | |
99 // fSize.set(SK_Scalar1, SK_Scalar1); | |
100 } | |
101 } | |
102 | |
103 SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERR
IDE { | |
104 this->inval(NULL); | |
105 return NULL; | |
106 } | |
107 | |
108 private: | |
109 typedef SampleView INHERITED; | |
110 }; | |
111 | |
112 /////////////////////////////////////////////////////////////////////////////// | |
113 | |
114 static SkView* MyFactory() { return new OvalTestView; } | |
115 static SkViewRegister reg(MyFactory); | |
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