OLD | NEW |
1 /* | 1 /* |
2 * Copyright 2016 Google Inc. | 2 * Copyright 2016 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 /* | 8 /* |
9 * This GM presents a variety of different gradients with different | 9 * This GM presents a variety of different gradients with different |
10 * tile modes. Each entry in the table is a rectangle with a linear | 10 * tile modes. Each entry in the table is a rectangle with a linear |
11 * gradient that spans from its left edge to its right edge. The rows | 11 * gradient that spans from its left edge to its right edge. The rows |
12 * in the table represent different color/position configurations, | 12 * in the table represent different color/position configurations, |
13 * while the columns in the table represent different tile modes. In | 13 * while the columns in the table represent different tile modes. In |
14 * order to highlight the differences between tile modes, the gradient | 14 * order to highlight the differences between tile modes, the gradient |
15 * starts and ends at 30 pixel inset from either side of the rectangle. | 15 * starts and ends at 30 pixel inset from either side of the rectangle. |
16 * | 16 * |
17 * | Clamp Repeat Mirror | 17 * | Clamp Repeat Mirror |
18 * _____________________|___________________________________________ | 18 * ___________________________|___________________________________________ |
19 * 2-color | rect00 rect01 rect02 | 19 * 2-color | rect00 rect01 rect02 |
20 * 3-color | rect10 rect11 rect12 | 20 * 3-color even | rect10 rect11 rect12 |
21 * 5-color hard stop | rect20 rect21 rect22 | 21 * 3-color texture | rect20 rect21 rect22 |
22 * 5-color edge case 1 | rect30 rect31 rect32 | 22 * 5-color hard stop | rect30 rect31 rect32 |
23 * 5-color edge case 2 | rect40 rect41 rect42 | 23 * 4-color hard stop centered | rect40 rect41 rect42 |
| 24 * 3-color hard stop 001 | rect50 rect51 rect52 |
| 25 * 3-color hard stop 011 | rect60 rect61 rect62 |
24 * | 26 * |
25 * The LAST two t-values in edge case 1 are the same, while the FIRST | 27 * The first three rows are cases covered by pre-hard-stop code; simple |
26 * two t-values in edge case 2 are the same. | 28 * 2-color gradients, 3-color gradients with the middle color centered, |
| 29 * and general gradients that are rendered from a texture atlas. |
| 30 * |
| 31 * The next four rows all deal with hard stop gradients. The fourth row |
| 32 * is a generic hard stop gradient, while the three subsequent rows deal |
| 33 * with special cases of hard stop gradients; centered hard stop gradients |
| 34 * (with t-values 0, 0.5, 0.5, 1), and two edge cases (with t-values |
| 35 * 0, 0, 1 and 0, 1, 1). |
27 */ | 36 */ |
28 | 37 |
29 #include "gm.h" | 38 #include "gm.h" |
30 | 39 |
31 #include "SkGradientShader.h" | 40 #include "SkGradientShader.h" |
32 | 41 |
33 const int WIDTH = 500; | 42 const int WIDTH = 500; |
34 const int HEIGHT = 500; | 43 const int HEIGHT = 500; |
35 | 44 |
36 const int NUM_ROWS = 5; | 45 const int NUM_ROWS = 7; |
37 const int NUM_COLS = 3; | 46 const int NUM_COLS = 3; |
38 | 47 |
39 const int CELL_WIDTH = WIDTH / NUM_COLS; | 48 const int CELL_WIDTH = WIDTH / NUM_COLS; |
40 const int CELL_HEIGHT = HEIGHT / NUM_ROWS; | 49 const int CELL_HEIGHT = HEIGHT / NUM_ROWS; |
41 | 50 |
42 const int PAD_WIDTH = 3; | 51 const int PAD_WIDTH = 3; |
43 const int PAD_HEIGHT = 3; | 52 const int PAD_HEIGHT = 3; |
44 | 53 |
45 const int RECT_WIDTH = CELL_WIDTH - (2 * PAD_WIDTH); | 54 const int RECT_WIDTH = CELL_WIDTH - (2 * PAD_WIDTH); |
46 const int RECT_HEIGHT = CELL_HEIGHT - (2 * PAD_HEIGHT); | 55 const int RECT_HEIGHT = CELL_HEIGHT - (2 * PAD_HEIGHT); |
47 | 56 |
48 static void shade_rect(SkCanvas* canvas, sk_sp<SkShader> shader, int cellRow, in
t cellCol) { | 57 static void shade_rect(SkCanvas* canvas, sk_sp<SkShader> shader, int cellRow, in
t cellCol) { |
49 SkPaint paint; | 58 SkPaint paint; |
50 paint.setShader(shader); | 59 paint.setShader(shader); |
51 | 60 |
52 SkRect rect = SkRect::MakeXYWH(SkIntToScalar(cellCol * CELL_WIDTH + PAD_WID
TH), | 61 SkRect rect = SkRect::MakeXYWH(SkIntToScalar(cellCol * CELL_WIDTH + PAD_WID
TH), |
53 SkIntToScalar(cellRow * CELL_HEIGHT + PAD_HEI
GHT), | 62 SkIntToScalar(cellRow * CELL_HEIGHT + PAD_HEI
GHT), |
54 SkIntToScalar(RECT_WIDTH), | 63 SkIntToScalar(RECT_WIDTH), |
55 SkIntToScalar(RECT_HEIGHT)); | 64 SkIntToScalar(RECT_HEIGHT)); |
56 | 65 |
57 canvas->drawRect(rect, paint); | 66 canvas->drawRect(rect, paint); |
58 } | 67 } |
59 | 68 |
60 static void create_gradient_points(int cellRow, int cellCol, SkPoint points[2])
{ | 69 static void create_gradient_points(int cellRow, int cellCol, SkPoint points[2])
{ |
61 const int X_OFFSET = 30; | 70 const int X_OFFSET = 30; |
62 | 71 |
63 auto x0 = SkIntToScalar(cellCol * CELL_WIDTH + PAD_WIDTH + X_OFFSET); | 72 auto x0 = SkIntToScalar(cellCol * CELL_WIDTH + PAD_WIDTH + X_OFFSET); |
64 auto x1 = SkIntToScalar((cellCol+1) * CELL_WIDTH - PAD_WIDTH - X_OFFSET); | 73 auto x1 = SkIntToScalar((cellCol+1) * CELL_WIDTH - PAD_WIDTH - X_OFFSET); |
65 auto y = SkIntToScalar(cellRow * CELL_HEIGHT + PAD_HEIGHT + RECT_HEIGHT/2); | 74 auto y = SkIntToScalar(cellRow * CELL_HEIGHT + PAD_HEIGHT + RECT_HEIGHT
/2); |
66 | 75 |
67 points[0] = SkPoint::Make(x0, y); | 76 points[0] = SkPoint::Make(x0, y); |
68 points[1] = SkPoint::Make(x1, y); | 77 points[1] = SkPoint::Make(x1, y); |
69 } | 78 } |
70 | 79 |
71 class HardstopGradientShaderGM : public skiagm::GM { | 80 class HardstopGradientShaderGM : public skiagm::GM { |
72 public: | 81 public: |
73 HardstopGradientShaderGM() { | 82 HardstopGradientShaderGM() { |
74 | 83 |
75 } | 84 } |
(...skipping 11 matching lines...) Expand all Loading... |
87 SkPoint points[2]; | 96 SkPoint points[2]; |
88 | 97 |
89 SkColor colors[] = { | 98 SkColor colors[] = { |
90 SK_ColorRED, | 99 SK_ColorRED, |
91 SK_ColorGREEN, | 100 SK_ColorGREEN, |
92 SK_ColorBLUE, | 101 SK_ColorBLUE, |
93 SK_ColorYELLOW, | 102 SK_ColorYELLOW, |
94 SK_ColorMAGENTA, | 103 SK_ColorMAGENTA, |
95 }; | 104 }; |
96 | 105 |
97 SkScalar row3[] = {0.00f, 0.25f, 0.50f, 0.50f, 1.00f}; | 106 SkScalar row3[] = {0.00f, 0.25f, 1.00f}; |
98 SkScalar row4[] = {0.00f, 0.25f, 0.50f, 1.00f, 1.00f}; | 107 SkScalar row4[] = {0.00f, 0.25f, 0.50f, 0.50f, 1.00f}; |
99 SkScalar row5[] = {0.00f, 0.00f, 0.50f, 0.50f, 1.00f}; | 108 SkScalar row5[] = {0.00f, 0.50f, 0.50f, 1.00f}; |
| 109 SkScalar row6[] = {0.00f, 0.00f, 1.00f}; |
| 110 SkScalar row7[] = {0.00f, 1.00f, 1.00f}; |
100 | 111 |
101 SkScalar* positions[] = { | 112 SkScalar* positions[NUM_ROWS] = { |
102 nullptr, | 113 nullptr, |
103 nullptr, | 114 nullptr, |
104 row3, | 115 row3, |
105 row4, | 116 row4, |
106 row5, | 117 row5, |
| 118 row6, |
| 119 row7, |
107 }; | 120 }; |
108 | 121 |
109 int numGradientColors[] = { | 122 int numGradientColors[NUM_ROWS] = { |
110 2, | 123 2, |
111 3, | 124 3, |
| 125 3, |
112 5, | 126 5, |
113 5, | 127 4, |
114 5, | 128 3, |
| 129 3, |
115 }; | 130 }; |
116 | 131 |
117 SkShader::TileMode tilemodes[] = { | 132 SkShader::TileMode tilemodes[NUM_COLS] = { |
118 SkShader::kClamp_TileMode, | 133 SkShader::kClamp_TileMode, |
119 SkShader::kRepeat_TileMode, | 134 SkShader::kRepeat_TileMode, |
120 SkShader::kMirror_TileMode, | 135 SkShader::kMirror_TileMode, |
121 }; | 136 }; |
122 | 137 |
123 for (int cellRow = 0; cellRow < NUM_ROWS; cellRow++) { | 138 for (int cellRow = 0; cellRow < NUM_ROWS; cellRow++) { |
124 for (int cellCol = 0; cellCol < NUM_COLS; cellCol++) { | 139 for (int cellCol = 0; cellCol < NUM_COLS; cellCol++) { |
125 create_gradient_points(cellRow, cellCol, points); | 140 create_gradient_points(cellRow, cellCol, points); |
126 | 141 |
127 auto shader = SkGradientShader::MakeLinear( | 142 auto shader = SkGradientShader::MakeLinear( |
128 points, | 143 points, |
129 colors, | 144 colors, |
130 positions[cellRow], | 145 positions[cellRow], |
131 numGradientColors[cellRow], | 146 numGradientColors[cellRow], |
132 tilemodes[cellCol], | 147 tilemodes[cellCol], |
133 0, | 148 0, |
134 nullptr); | 149 nullptr); |
135 | 150 |
136 shade_rect(canvas, shader, cellRow, cellCol); | 151 shade_rect(canvas, shader, cellRow, cellCol); |
137 } | 152 } |
138 } | 153 } |
139 } | 154 } |
140 | 155 |
141 private: | 156 private: |
142 typedef skiagm::GM INHERITED; | 157 typedef skiagm::GM INHERITED; |
143 }; | 158 }; |
144 | 159 |
145 DEF_GM(return new HardstopGradientShaderGM;) | 160 DEF_GM(return new HardstopGradientShaderGM;) |
OLD | NEW |