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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 UI_GFX_CODEC_PNG_CODEC_H_ | 5 #ifndef UI_GFX_CODEC_PNG_CODEC_H_ |
6 #define UI_GFX_CODEC_PNG_CODEC_H_ | 6 #define UI_GFX_CODEC_PNG_CODEC_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <string> | 9 #include <string> |
10 #include <vector> | 10 #include <vector> |
11 | 11 |
12 #include "base/basictypes.h" | 12 #include "base/basictypes.h" |
13 #include "ui/ui_api.h" | 13 #include "ui/base/ui_export.h" |
14 | 14 |
15 class SkBitmap; | 15 class SkBitmap; |
16 | 16 |
17 namespace gfx { | 17 namespace gfx { |
18 | 18 |
19 class Size; | 19 class Size; |
20 | 20 |
21 // Interface for encoding and decoding PNG data. This is a wrapper around | 21 // Interface for encoding and decoding PNG data. This is a wrapper around |
22 // libpng, which has an inconvenient interface for callers. This is currently | 22 // libpng, which has an inconvenient interface for callers. This is currently |
23 // designed for use in tests only (where we control the files), so the handling | 23 // designed for use in tests only (where we control the files), so the handling |
24 // isn't as robust as would be required for a browser (see Decode() for more). | 24 // isn't as robust as would be required for a browser (see Decode() for more). |
25 // WebKit has its own more complicated PNG decoder which handles, among other | 25 // WebKit has its own more complicated PNG decoder which handles, among other |
26 // things, partially downloaded data. | 26 // things, partially downloaded data. |
27 class UI_API PNGCodec { | 27 class UI_EXPORT PNGCodec { |
28 public: | 28 public: |
29 enum ColorFormat { | 29 enum ColorFormat { |
30 // 3 bytes per pixel (packed), in RGB order regardless of endianness. | 30 // 3 bytes per pixel (packed), in RGB order regardless of endianness. |
31 // This is the native JPEG format. | 31 // This is the native JPEG format. |
32 FORMAT_RGB, | 32 FORMAT_RGB, |
33 | 33 |
34 // 4 bytes per pixel, in RGBA order in memory regardless of endianness. | 34 // 4 bytes per pixel, in RGBA order in memory regardless of endianness. |
35 FORMAT_RGBA, | 35 FORMAT_RGBA, |
36 | 36 |
37 // 4 bytes per pixel, in BGRA order in memory regardless of endianness. | 37 // 4 bytes per pixel, in BGRA order in memory regardless of endianness. |
38 // This is the default Windows DIB order. | 38 // This is the default Windows DIB order. |
39 FORMAT_BGRA, | 39 FORMAT_BGRA, |
40 | 40 |
41 // 4 bytes per pixel, in pre-multiplied kARGB_8888_Config format. For use | 41 // 4 bytes per pixel, in pre-multiplied kARGB_8888_Config format. For use |
42 // with directly writing to a skia bitmap. | 42 // with directly writing to a skia bitmap. |
43 FORMAT_SkBitmap | 43 FORMAT_SkBitmap |
44 }; | 44 }; |
45 | 45 |
46 // Represents a comment in the tEXt ancillary chunk of the png. | 46 // Represents a comment in the tEXt ancillary chunk of the png. |
47 struct UI_API Comment { | 47 struct UI_EXPORT Comment { |
48 Comment(const std::string& k, const std::string& t); | 48 Comment(const std::string& k, const std::string& t); |
49 ~Comment(); | 49 ~Comment(); |
50 | 50 |
51 std::string key; | 51 std::string key; |
52 std::string text; | 52 std::string text; |
53 }; | 53 }; |
54 | 54 |
55 // Calls PNGCodec::EncodeWithCompressionLevel with the default compression | 55 // Calls PNGCodec::EncodeWithCompressionLevel with the default compression |
56 // level. | 56 // level. |
57 static bool Encode(const unsigned char* input, | 57 static bool Encode(const unsigned char* input, |
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126 static SkBitmap* CreateSkBitmapFromBGRAFormat( | 126 static SkBitmap* CreateSkBitmapFromBGRAFormat( |
127 std::vector<unsigned char>& bgra, int width, int height); | 127 std::vector<unsigned char>& bgra, int width, int height); |
128 | 128 |
129 private: | 129 private: |
130 DISALLOW_COPY_AND_ASSIGN(PNGCodec); | 130 DISALLOW_COPY_AND_ASSIGN(PNGCodec); |
131 }; | 131 }; |
132 | 132 |
133 } // namespace gfx | 133 } // namespace gfx |
134 | 134 |
135 #endif // UI_GFX_CODEC_PNG_CODEC_H_ | 135 #endif // UI_GFX_CODEC_PNG_CODEC_H_ |
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