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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 */ | |
reed1
2013/06/12 13:34:33
nit: LF after */
ducky
2013/06/12 18:24:01
Done.
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7 #include "SkRefCnt.h" | |
8 | |
vandebo (ex-Chrome)
2013/06/12 16:25:33
Include what you use... SkColor, SkPoint, SkScalar
reed1
2013/06/12 17:11:26
Possibly, but almost no where in skia to we really
ducky
2013/06/12 18:24:01
Done - added additional includes.
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9 #include "gm.h" | |
10 #include "SkGradientShader.h" | |
11 | |
12 SkColor gColors[] = { | |
reed1
2013/06/12 13:34:33
static const
or move into scope of the caller
ducky
2013/06/12 18:24:01
Done.
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13 SK_ColorRED, SK_ColorYELLOW | |
14 }; | |
15 | |
16 // these arrays define the gradient stop points | |
17 // as x1, y1, x2, y2 per gradient to draw | |
18 SkPoint linearPts[][2] = { | |
reed1
2013/06/12 13:34:33
static const
or move into scope of the caller
ducky
2013/06/12 18:24:01
Done.
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19 {{0, 0}, {1, 0}}, | |
20 {{0, 0}, {0, 1}}, | |
21 {{1, 0}, {0, 0}}, | |
22 {{0, 1}, {0, 0}}, | |
23 | |
24 {{0, 0}, {1, 1}}, | |
25 {{1, 1}, {0, 0}}, | |
26 {{1, 0}, {0, 1}}, | |
27 {{0, 1}, {1, 0}} | |
28 }; | |
29 | |
30 const SkScalar TESTGRID_X = 200; // pixels allocated to each image in x dimen sion | |
31 const SkScalar TESTGRID_Y = 200; // pixels allocated to each image in y dimen sion | |
32 | |
33 const int IMAGES_X = 4; // number of images per row | |
34 | |
35 static SkShader* make_linear_gradient(SkPoint pts[2]) { | |
36 return SkGradientShader::CreateLinear(pts, gColors, NULL, SK_ARRAY_COUNT(gCo lors), | |
37 SkShader::kClamp_TileMode, NULL); | |
38 } | |
39 | |
40 void draw_gradients(SkCanvas* canvas, SkShader* (*makeShader)(SkPoint[2]), | |
41 SkPoint ptsArray[][2], int numImages) { | |
42 // common test parameters | |
43 SkMatrix shaderMat = SkMatrix(); | |
reed1
2013/06/12 13:34:33
not sure why you need this assignment?
ducky
2013/06/12 18:24:01
Done - removed.
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44 shaderMat.setAll(138, 0, 43, | |
reed1
2013/06/12 13:34:33
can we have a brief comment why you're using these
ducky
2013/06/12 18:24:01
Done.
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45 0, 106, 61, | |
46 0, 0, 1); | |
47 SkRect rectGrad = { 43, 61, 181, 167 }; // some nice prime numbers | |
48 | |
49 canvas->save(); | |
50 for (int i = 0; i < numImages; i++) { | |
51 // advance line if necessary | |
52 if (i % IMAGES_X == 0 && i != 0) { | |
53 canvas->restore(); | |
54 canvas->translate(0, TESTGRID_Y); | |
55 canvas->save(); | |
56 } | |
57 | |
58 // unpack points, setup shader, draw | |
vandebo (ex-Chrome)
2013/06/12 16:25:33
Update comment. Comments should be sentences, sta
ducky
2013/06/12 18:24:01
Done.
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59 SkAutoTUnref<SkShader> shader(makeShader(*ptsArray)); | |
60 shader->setLocalMatrix(shaderMat); | |
61 | |
62 SkPaint paint; | |
63 paint.setShader(shader); | |
64 canvas->drawRect(rectGrad, paint); | |
65 | |
66 // advance to next position | |
vandebo (ex-Chrome)
2013/06/12 16:25:33
Comments should explain why you're doing something
reed1
2013/06/12 17:11:26
Not sure I agree. I find this comment helpful to k
ducky
2013/06/12 18:24:01
Done - leaving as is.
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67 canvas->translate(TESTGRID_X, 0); | |
68 ptsArray++; | |
69 } | |
70 canvas->restore(); | |
71 } | |
72 | |
73 namespace skiagm { | |
74 | |
75 class GradientMatrixGM : public GM { | |
76 public: | |
77 GradientMatrixGM() { | |
78 this->setBGColor(0xFFDDDDDD); | |
79 } | |
80 | |
81 protected: | |
82 SkString onShortName() { | |
reed1
2013/06/12 13:34:33
SK_OVERRIDE
ducky
2013/06/12 18:24:01
Done.
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83 return SkString("gradient_matrix"); | |
84 } | |
85 | |
86 virtual SkISize onISize() { | |
reed1
2013/06/12 13:34:33
SK_OVERRIDE
ducky
2013/06/12 18:24:01
Done.
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87 return SkISize::Make(800, 800); | |
88 } | |
89 | |
90 virtual void onDraw(SkCanvas* canvas) { | |
reed1
2013/06/12 13:34:33
SK_OVERRIDE
ducky
2013/06/12 18:24:01
Done.
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91 draw_gradients(canvas, &make_linear_gradient, | |
92 linearPts, SK_ARRAY_COUNT(linearPts)); | |
93 } | |
94 | |
95 private: | |
96 typedef GM INHERITED; | |
97 }; | |
98 | |
99 static GM* MyFactory(void*) { return new GradientMatrixGM; } | |
reed1
2013/06/12 13:34:33
DEF_GM( return new GradientMatrixGM; )
ducky
2013/06/12 18:24:01
Done.
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100 static GMRegistry reg(MyFactory); | |
101 } | |
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