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1 /* | |
2 * Copyright 2013 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 #include "gm.h" | |
8 #include "SkGradientShader.h" | |
9 | |
10 static const SkColor gColors[] = { | |
11 SK_ColorRED, SK_ColorYELLOW | |
12 }; | |
13 static const SkScalar gPosAll[] = { | |
14 0, SK_Scalar1 | |
15 }; | |
16 | |
17 static SkShader* SimpleGradient(const SkPoint pts[2]) { | |
vandebo (ex-Chrome)
2013/06/11 05:15:10
static helper functions are named in hacker case:
ducky
2013/06/11 21:35:32
Done.
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18 return SkGradientShader::CreateLinear(pts, gColors, gPosAll, | |
19 2, SkShader::kClamp_TileMode, NULL); | |
vandebo (ex-Chrome)
2013/06/11 05:15:10
nit: put "2" on the previous line.
ducky
2013/06/11 21:35:32
Done.
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20 } | |
21 | |
22 namespace skiagm { | |
23 | |
24 class GradientMatrixGM : public GM { | |
25 public: | |
26 GradientMatrixGM() { | |
27 this->setBGColor(0xFFDDDDDD); | |
28 } | |
29 | |
30 protected: | |
31 SkString onShortName() { | |
32 return SkString("gradient_matrix"); | |
33 } | |
34 | |
35 virtual SkISize onISize() { return make_isize(800, 400); } | |
vandebo (ex-Chrome)
2013/06/11 05:15:10
line wrap.
ducky
2013/06/11 21:35:32
Done.
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36 | |
37 virtual void onDraw(SkCanvas* canvas) { | |
38 const int TESTGRID_X = 200; | |
vandebo (ex-Chrome)
2013/06/11 05:15:10
Should be SkScalar instead of int (applies in mult
ducky
2013/06/11 21:35:32
Done.
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39 const int TESTGRID_Y = 200; | |
40 | |
41 canvas->save(); | |
42 | |
43 testGrad(canvas, 0, 0, 1, 0); | |
44 canvas->translate(TESTGRID_X, 0); | |
45 testGrad(canvas, 0, 0, 0, 1); | |
46 canvas->translate(TESTGRID_X, 0); | |
47 testGrad(canvas, 1, 0, 0, 0); | |
48 canvas->translate(TESTGRID_X, 0); | |
49 testGrad(canvas, 0, 1, 0, 0); | |
50 | |
51 canvas->restore(); | |
52 canvas->translate(0, TESTGRID_Y); | |
53 canvas->save(); | |
54 | |
55 testGrad(canvas, 0, 0, 1, 1); | |
56 canvas->translate(TESTGRID_X, 0); | |
57 testGrad(canvas, 1, 1, 0, 0); | |
58 canvas->translate(TESTGRID_X, 0); | |
59 testGrad(canvas, 1, 0, 0, 1); | |
60 canvas->translate(TESTGRID_X, 0); | |
61 testGrad(canvas, 0, 1, 1, 0); | |
62 } | |
63 | |
64 virtual void simpleGrad(SkCanvas* canvas) { | |
vandebo (ex-Chrome)
2013/06/11 05:15:10
This method is unused, remove.
ducky
2013/06/11 21:35:32
Done.
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65 SkPoint pts[2] = { | |
66 { 100, 0 }, | |
67 { 0, 0 } | |
68 }; | |
69 SkMatrix shaderMat = SkMatrix(); | |
70 shaderMat.setAll(1, 0, 0, | |
71 0, 1, 0, | |
72 0, 0, 1); | |
73 SkRect rectGrad = { 0, 0, 100, 100 }; // very simple numbers | |
74 | |
75 SkShader* shader = SimpleGradient(pts); | |
76 shader->setLocalMatrix(shaderMat); | |
77 SkPaint paint; | |
78 paint.setAntiAlias(true); | |
79 paint.setShader(shader); | |
80 canvas->drawRect(rectGrad, paint); | |
81 shader->unref(); | |
82 } | |
83 | |
84 virtual void testGrad(SkCanvas* canvas, int x1, int y1, int x2, int y2) { | |
vandebo (ex-Chrome)
2013/06/11 05:15:10
not virtual. In fact, it can be a static helper f
ducky
2013/06/11 21:35:32
Done.
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85 SkPoint pts[2] = { | |
vandebo (ex-Chrome)
2013/06/11 05:15:10
why not just pass SkPoints[2] ?
ducky
2013/06/11 21:35:32
Done.
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86 { x1, y1 }, | |
87 { x2, y2 } | |
88 }; | |
89 SkMatrix shaderMat = SkMatrix(); | |
90 shaderMat.setAll(138, 0, 43, | |
91 0, 106, 61, | |
92 0, 0, 1); | |
93 SkRect rectGrad = { 43, 61, 181, 167 }; // some nice prime numbers | |
94 | |
95 SkShader* shader = SimpleGradient(pts); | |
96 shader->setLocalMatrix(shaderMat); | |
97 SkPaint paint; | |
98 paint.setAntiAlias(true); | |
vandebo (ex-Chrome)
2013/06/11 05:15:10
remove - not needed for this test.
ducky
2013/06/11 21:35:32
Done.
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99 paint.setShader(shader); | |
100 canvas->drawRect(rectGrad, paint); | |
101 shader->unref(); | |
102 } | |
103 | |
104 private: | |
105 typedef GM INHERITED; | |
106 }; | |
107 | |
108 static GM* MyFactory(void*) { return new GradientMatrixGM; } | |
109 static GMRegistry reg(MyFactory); | |
110 | |
111 } | |
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