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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 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 "../include/core/SkCanvas.h" | 8 #include "../include/core/SkCanvas.h" |
9 #include "../include/core/SkData.h" | 9 #include "../include/core/SkData.h" |
10 #include "../include/core/SkSurface.h" | 10 #include "../include/core/SkSurface.h" |
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60 | 60 |
61 int main(int, char**) { | 61 int main(int, char**) { |
62 bool gl_ok = setup_gl_context(); | 62 bool gl_ok = setup_gl_context(); |
63 srand(time(nullptr)); | 63 srand(time(nullptr)); |
64 std::shared_ptr<SkSurface> surface = (gl_ok && rand() % 2) ? create_opengl_s
urface(320, 240) | 64 std::shared_ptr<SkSurface> surface = (gl_ok && rand() % 2) ? create_opengl_s
urface(320, 240) |
65 : create_raster_s
urface(320, 240); | 65 : create_raster_s
urface(320, 240); |
66 | 66 |
67 // Create a left-to-right green-to-purple gradient shader. | 67 // Create a left-to-right green-to-purple gradient shader. |
68 SkPoint pts[] = { {0,0}, {320,240} }; | 68 SkPoint pts[] = { {0,0}, {320,240} }; |
69 SkColor colors[] = { 0xFF00FF00, 0xFFFF00FF }; | 69 SkColor colors[] = { 0xFF00FF00, 0xFFFF00FF }; |
70 std::shared_ptr<SkShader> shader = adopt( | |
71 SkGradientShader::CreateLinear(pts, colors, nullptr, 2, SkShader::kR
epeat_TileMode)); | |
72 | |
73 // Our text will draw with this paint: size 24, antialiased, with the shader
. | 70 // Our text will draw with this paint: size 24, antialiased, with the shader
. |
74 SkPaint paint; | 71 SkPaint paint; |
75 paint.setTextSize(24); | 72 paint.setTextSize(24); |
76 paint.setAntiAlias(true); | 73 paint.setAntiAlias(true); |
77 paint.setShader(shader.get()); | 74 paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShad
er::kRepeat_TileMode)); |
78 | 75 |
79 // Draw to the surface via its SkCanvas. | 76 // Draw to the surface via its SkCanvas. |
80 SkCanvas* canvas = surface->getCanvas(); // We don't manage this pointer's
lifetime. | 77 SkCanvas* canvas = surface->getCanvas(); // We don't manage this pointer's
lifetime. |
81 static const char* msg = "Hello world!"; | 78 static const char* msg = "Hello world!"; |
82 canvas->clear(SK_ColorWHITE); | 79 canvas->clear(SK_ColorWHITE); |
83 canvas->drawText(msg, strlen(msg), 90,120, paint); | 80 canvas->drawText(msg, strlen(msg), 90,120, paint); |
84 | 81 |
85 // Grab a snapshot of the surface as an immutable SkImage. | 82 // Grab a snapshot of the surface as an immutable SkImage. |
86 std::shared_ptr<SkImage> image = adopt(surface->newImageSnapshot()); | 83 std::shared_ptr<SkImage> image = adopt(surface->newImageSnapshot()); |
87 // Encode that image as a .png into a blob in memory. | 84 // Encode that image as a .png into a blob in memory. |
88 std::shared_ptr<SkData> png = adopt(image->encode(SkImageEncoder::kPNG_Type,
100)); | 85 std::shared_ptr<SkData> png = adopt(image->encode(SkImageEncoder::kPNG_Type,
100)); |
89 | 86 |
90 // This code is no longer Skia-specific. We just dump the .png to disk. An
y way works. | 87 // This code is no longer Skia-specific. We just dump the .png to disk. An
y way works. |
91 static const char* path = "example.png"; | 88 static const char* path = "example.png"; |
92 std::ofstream(path, std::ios::out | std::ios::binary) | 89 std::ofstream(path, std::ios::out | std::ios::binary) |
93 .write((const char*)png->data(), png->size()); | 90 .write((const char*)png->data(), png->size()); |
94 std::cout << "Wrote " << path << std::endl; | 91 std::cout << "Wrote " << path << std::endl; |
95 | 92 |
96 return 0; | 93 return 0; |
97 } | 94 } |
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