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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 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 #include "gm.h" | 8 #include "gm.h" |
9 #include "SkCanvas.h" | 9 #include "SkCanvas.h" |
10 #include "SkColorPriv.h" | 10 #include "SkColorPriv.h" |
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47 SkColor colors[] = { | 47 SkColor colors[] = { |
48 SK_ColorBLUE, SK_ColorYELLOW, SK_ColorBLACK, SK_ColorGREEN, SK_ColorGRAY | 48 SK_ColorBLUE, SK_ColorYELLOW, SK_ColorBLACK, SK_ColorGREEN, SK_ColorGRAY |
49 }; | 49 }; |
50 SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COU
NT(colors), | 50 SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COU
NT(colors), |
51 SkShader::kClamp_TileMode); | 51 SkShader::kClamp_TileMode); |
52 paint.setShader(s)->unref(); | 52 paint.setShader(s)->unref(); |
53 canvas.drawPaint(paint); | 53 canvas.drawPaint(paint); |
54 return bm; | 54 return bm; |
55 } | 55 } |
56 | 56 |
| 57 static SkBitmap make_arith(const SkBitmap& src, const SkBitmap& dst, |
| 58 const SkScalar k[]) { |
| 59 SkBitmap bm = make_bm(); |
| 60 SkCanvas canvas(bm); |
| 61 SkPaint paint; |
| 62 canvas.drawBitmap(dst, 0, 0, NULL); |
| 63 SkXfermode* xfer = SkArithmeticMode::Create(k[0], k[1], k[2], k[3]); |
| 64 paint.setXfermode(xfer)->unref(); |
| 65 canvas.drawBitmap(src, 0, 0, &paint); |
| 66 return bm; |
| 67 } |
| 68 |
57 static void show_k_text(SkCanvas* canvas, SkScalar x, SkScalar y, const SkScalar
k[]) { | 69 static void show_k_text(SkCanvas* canvas, SkScalar x, SkScalar y, const SkScalar
k[]) { |
58 SkPaint paint; | 70 SkPaint paint; |
59 paint.setTextSize(SkIntToScalar(24)); | 71 paint.setTextSize(SkIntToScalar(24)); |
60 paint.setAntiAlias(true); | 72 paint.setAntiAlias(true); |
61 for (int i = 0; i < 4; ++i) { | 73 for (int i = 0; i < 4; ++i) { |
62 SkString str; | 74 SkString str; |
63 str.appendScalar(k[i]); | 75 str.appendScalar(k[i]); |
64 SkScalar width = paint.measureText(str.c_str(), str.size()); | 76 SkScalar width = paint.measureText(str.c_str(), str.size()); |
65 canvas->drawText(str.c_str(), str.size(), x, y + paint.getTextSize(), pa
int); | 77 canvas->drawText(str.c_str(), str.size(), x, y + paint.getTextSize(), pa
int); |
66 x += width + SkIntToScalar(10); | 78 x += width + SkIntToScalar(10); |
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97 one/4, one/2, one/2, 0, | 109 one/4, one/2, one/2, 0, |
98 -one/4, one/2, one/2, 0, | 110 -one/4, one/2, one/2, 0, |
99 }; | 111 }; |
100 | 112 |
101 const SkScalar* k = K; | 113 const SkScalar* k = K; |
102 const SkScalar* stop = k + SK_ARRAY_COUNT(K); | 114 const SkScalar* stop = k + SK_ARRAY_COUNT(K); |
103 SkScalar y = 0; | 115 SkScalar y = 0; |
104 SkScalar gap = SkIntToScalar(src.width() + 20); | 116 SkScalar gap = SkIntToScalar(src.width() + 20); |
105 while (k < stop) { | 117 while (k < stop) { |
106 SkScalar x = 0; | 118 SkScalar x = 0; |
| 119 SkBitmap res = make_arith(src, dst, k); |
107 canvas->drawBitmap(src, x, y, NULL); | 120 canvas->drawBitmap(src, x, y, NULL); |
108 x += gap; | 121 x += gap; |
109 canvas->drawBitmap(dst, x, y, NULL); | 122 canvas->drawBitmap(dst, x, y, NULL); |
110 x += gap; | 123 x += gap; |
111 SkRect rect = SkRect::MakeXYWH(x, y, SkIntToScalar(WW), SkIntToScala
r(HH)); | 124 canvas->drawBitmap(res, x, y, NULL); |
112 canvas->saveLayer(&rect, NULL); | |
113 canvas->drawBitmap(dst, x, y, NULL); | |
114 SkXfermode* xfer = SkArithmeticMode::Create(k[0], k[1], k[2], k[3]); | |
115 SkPaint paint; | |
116 paint.setXfermode(xfer)->unref(); | |
117 canvas->drawBitmap(src, x, y, &paint); | |
118 canvas->restore(); | |
119 x += gap; | 125 x += gap; |
120 show_k_text(canvas, x, y, k); | 126 show_k_text(canvas, x, y, k); |
121 k += 4; | 127 k += 4; |
122 y += SkIntToScalar(src.height() + 12); | 128 y += SkIntToScalar(src.height() + 12); |
123 } | 129 } |
124 } | 130 } |
125 | 131 |
126 private: | 132 private: |
127 typedef GM INHERITED; | 133 typedef GM INHERITED; |
128 }; | 134 }; |
129 | 135 |
130 /////////////////////////////////////////////////////////////////////////////// | 136 /////////////////////////////////////////////////////////////////////////////// |
131 | 137 |
132 static skiagm::GM* MyFactory(void*) { return new ArithmodeGM; } | 138 static skiagm::GM* MyFactory(void*) { return new ArithmodeGM; } |
133 static skiagm::GMRegistry reg(MyFactory); | 139 static skiagm::GMRegistry reg(MyFactory); |
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