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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 #ifndef SKIA_EXT_PLATFORM_DEVICE_H_ | 5 #ifndef SKIA_EXT_PLATFORM_DEVICE_H_ |
6 #define SKIA_EXT_PLATFORM_DEVICE_H_ | 6 #define SKIA_EXT_PLATFORM_DEVICE_H_ |
7 | 7 |
8 #include "build/build_config.h" | 8 #include "build/build_config.h" |
9 | 9 |
10 #if defined(OS_WIN) | 10 #if defined(OS_WIN) |
11 #include <windows.h> | 11 #include <windows.h> |
12 #include <vector> | 12 #include <vector> |
13 #endif | 13 #endif |
14 | 14 |
15 #include "skia/ext/platform_surface.h" | 15 #include "skia/ext/platform_surface.h" |
16 #include "third_party/skia/include/core/SkBitmapDevice.h" | 16 #include "third_party/skia/include/core/SkBitmapDevice.h" |
17 #include "third_party/skia/include/core/SkTypes.h" | 17 #include "third_party/skia/include/core/SkTypes.h" |
18 | 18 |
19 class SkMatrix; | 19 class SkMatrix; |
20 class SkPath; | 20 class SkPath; |
21 class SkRegion; | 21 class SkRegion; |
22 | 22 |
23 namespace skia { | 23 namespace skia { |
24 | 24 |
25 class PlatformDevice; | 25 class PlatformDevice; |
26 class ScopedPlatformPaint; | |
26 | 27 |
27 // The following routines provide accessor points for the functionality | 28 // The following routines provide accessor points for the functionality |
28 // exported by the various PlatformDevice ports. | 29 // exported by the various PlatformDevice ports. |
29 // All calls to PlatformDevice::* should be routed through these | 30 // All calls to PlatformDevice::* should be routed through these |
30 // helper functions. | 31 // helper functions. |
31 | 32 |
32 // Bind a PlatformDevice instance, |platform_device| to |device|. Subsequent | 33 // Bind a PlatformDevice instance, |platform_device| to |device|. Subsequent |
33 // calls to the functions exported below will forward the request to the | 34 // calls to the functions exported below will forward the request to the |
34 // corresponding method on the bound PlatformDevice instance. If no | 35 // corresponding method on the bound PlatformDevice instance. If no |
35 // PlatformDevice has been bound to the SkBaseDevice passed, then the | 36 // PlatformDevice has been bound to the SkBaseDevice passed, then the |
(...skipping 18 matching lines...) Expand all Loading... | |
54 public: | 55 public: |
55 virtual ~PlatformDevice() {} | 56 virtual ~PlatformDevice() {} |
56 | 57 |
57 #if defined(OS_MACOSX) | 58 #if defined(OS_MACOSX) |
58 // The CGContext that corresponds to the bitmap, used for CoreGraphics | 59 // The CGContext that corresponds to the bitmap, used for CoreGraphics |
59 // operations drawing into the bitmap. This is possibly heavyweight, so it | 60 // operations drawing into the bitmap. This is possibly heavyweight, so it |
60 // should exist only during one pass of rendering. | 61 // should exist only during one pass of rendering. |
61 virtual CGContextRef GetBitmapContext() = 0; | 62 virtual CGContextRef GetBitmapContext() = 0; |
62 #endif | 63 #endif |
63 | 64 |
64 // The DC that corresponds to the bitmap, used for GDI operations drawing | |
65 // into the bitmap. This is possibly heavyweight, so it should be existant | |
66 // only during one pass of rendering. | |
67 virtual PlatformSurface BeginPlatformPaint(); | |
68 | |
69 // Finish a previous call to beginPlatformPaint. | |
70 virtual void EndPlatformPaint(); | |
71 | |
72 #if defined(OS_WIN) | 65 #if defined(OS_WIN) |
73 // Loads a SkPath into the GDI context. The path can there after be used for | 66 // Loads a SkPath into the GDI context. The path can there after be used for |
74 // clipping or as a stroke. Returns false if the path failed to be loaded. | 67 // clipping or as a stroke. Returns false if the path failed to be loaded. |
75 static bool LoadPathToDC(HDC context, const SkPath& path); | 68 static bool LoadPathToDC(HDC context, const SkPath& path); |
76 | 69 |
77 // Loads a SkRegion into the GDI context. | 70 // Loads a SkRegion into the GDI context. |
78 static void LoadClippingRegionToDC(HDC context, const SkRegion& region, | 71 static void LoadClippingRegionToDC(HDC context, const SkRegion& region, |
79 const SkMatrix& transformation); | 72 const SkMatrix& transformation); |
80 | 73 |
81 // Draws to the given screen DC, if the bitmap DC doesn't exist, this will | 74 // Draws to the given screen DC, if the bitmap DC doesn't exist, this will |
82 // temporarily create it. However, if you have created the bitmap DC, it will | 75 // temporarily create it. However, if you have created the bitmap DC, it will |
83 // be more efficient if you don't free it until after this call so it doesn't | 76 // be more efficient if you don't free it until after this call so it doesn't |
84 // have to be created twice. If src_rect is null, then the entirety of the | 77 // have to be created twice. If src_rect is null, then the entirety of the |
85 // source device will be copied. | 78 // source device will be copied. |
86 virtual void DrawToHDC(HDC, int x, int y, const RECT* src_rect); | 79 virtual void DrawToHDC(HDC, int x, int y, const RECT* src_rect); |
87 #endif | 80 #endif |
88 | 81 |
89 protected: | 82 protected: |
83 // The DC that corresponds to the bitmap, used for GDI operations drawing | |
84 // into the bitmap. This is possibly heavyweight, so it should be existant | |
85 // only during one pass of rendering. | |
86 virtual PlatformSurface BeginPlatformPaint(); | |
f(malita)
2016/03/29 18:14:13
nit: now private
| |
87 | |
90 #if defined(OS_WIN) | 88 #if defined(OS_WIN) |
91 // Arrays must be inside structures. | 89 // Arrays must be inside structures. |
92 struct CubicPoints { | 90 struct CubicPoints { |
93 SkPoint p[4]; | 91 SkPoint p[4]; |
94 }; | 92 }; |
95 typedef std::vector<CubicPoints> CubicPath; | 93 typedef std::vector<CubicPoints> CubicPath; |
96 typedef std::vector<CubicPath> CubicPaths; | 94 typedef std::vector<CubicPath> CubicPaths; |
97 | 95 |
98 // Loads the specified Skia transform into the device context, excluding | 96 // Loads the specified Skia transform into the device context, excluding |
99 // perspective (which GDI doesn't support). | 97 // perspective (which GDI doesn't support). |
100 static void LoadTransformToDC(HDC dc, const SkMatrix& matrix); | 98 static void LoadTransformToDC(HDC dc, const SkMatrix& matrix); |
101 | 99 |
102 // Transforms SkPath's paths into a series of cubic path. | 100 // Transforms SkPath's paths into a series of cubic path. |
103 static bool SkPathToCubicPaths(CubicPaths* paths, const SkPath& skpath); | 101 static bool SkPathToCubicPaths(CubicPaths* paths, const SkPath& skpath); |
104 #endif | 102 #endif |
103 | |
104 friend class ScopedPlatformPaint; | |
105 }; | 105 }; |
106 | 106 |
107 } // namespace skia | 107 } // namespace skia |
108 | 108 |
109 #endif // SKIA_EXT_PLATFORM_DEVICE_H_ | 109 #endif // SKIA_EXT_PLATFORM_DEVICE_H_ |
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