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1 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "skia/ext/vector_canvas.h" | 5 #include "skia/ext/vector_canvas.h" |
6 | 6 |
7 #include "skia/ext/bitmap_platform_device.h" | 7 #include "skia/ext/bitmap_platform_device.h" |
8 #include "skia/ext/vector_platform_device.h" | 8 #include "skia/ext/vector_platform_device.h" |
9 | 9 |
10 namespace skia { | 10 namespace skia { |
11 | 11 |
12 VectorCanvas::VectorCanvas(HDC dc, int width, int height) { | 12 VectorCanvas::VectorCanvas(HDC dc, int width, int height) { |
13 bool initialized = initialize(dc, width, height); | 13 bool initialized = initialize(dc, width, height); |
14 if (!initialized) | 14 if (!initialized) |
15 __debugbreak(); | 15 __debugbreak(); |
16 } | 16 } |
17 | 17 |
18 bool VectorCanvas::initialize(HDC context, int width, int height) { | 18 bool VectorCanvas::initialize(HDC context, int width, int height) { |
19 SkDevice* device = createPlatformDevice(width, height, true, context); | 19 SkDevice* device = SkVectorPlatformDeviceFactory::CreateDevice(width, height, |
| 20 true, context); |
20 if (!device) | 21 if (!device) |
21 return false; | 22 return false; |
22 | 23 |
23 setDevice(device); | 24 setDevice(device); |
24 device->unref(); // was created with refcount 1, and setDevice also refs | 25 device->unref(); // was created with refcount 1, and setDevice also refs |
25 return true; | 26 return true; |
26 } | 27 } |
27 | 28 |
28 SkDevice* VectorCanvas::createDevice(SkBitmap::Config config, | |
29 int width, int height, | |
30 bool is_opaque, bool isForLayer) { | |
31 SkASSERT(config == SkBitmap::kARGB_8888_Config); | |
32 return createPlatformDevice(width, height, is_opaque, NULL); | |
33 } | |
34 | |
35 SkDevice* VectorCanvas::createPlatformDevice(int width, | |
36 int height, bool is_opaque, | |
37 HANDLE shared_section) { | |
38 if (!is_opaque) { | |
39 // TODO(maruel): http://crbug.com/18382 When restoring a semi-transparent | |
40 // layer, i.e. merging it, we need to rasterize it because GDI doesn't | |
41 // support transparency except for AlphaBlend(). Right now, a | |
42 // BitmapPlatformDevice is created when VectorCanvas think a saveLayers() | |
43 // call is being done. The way to save a layer would be to create an | |
44 // EMF-based VectorDevice and have this device registers the drawing. When | |
45 // playing back the device into a bitmap, do it at the printer's dpi instead | |
46 // of the layout's dpi (which is much lower). | |
47 return BitmapPlatformDevice::create(width, height, | |
48 is_opaque, shared_section); | |
49 } | |
50 | |
51 // TODO(maruel): http://crbug.com/18383 Look if it would be worth to | |
52 // increase the resolution by ~10x (any worthy factor) to increase the | |
53 // rendering precision (think about printing) while using a relatively | |
54 // low dpi. This happens because we receive float as input but the GDI | |
55 // functions works with integers. The idea is to premultiply the matrix | |
56 // with this factor and multiply each SkScalar that are passed to | |
57 // SkScalarRound(value) as SkScalarRound(value * 10). Safari is already | |
58 // doing the same for text rendering. | |
59 SkASSERT(shared_section); | |
60 PlatformDevice* device = VectorPlatformDevice::create( | |
61 reinterpret_cast<HDC>(shared_section), width, height); | |
62 return device; | |
63 } | |
64 | |
65 } // namespace skia | 29 } // namespace skia |
66 | 30 |
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