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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef UI_GFX_CHROMEOS_CODEC_JPEG_CODEC_ROBUST_SLOW_H_ |
| 6 #define UI_GFX_CHROMEOS_CODEC_JPEG_CODEC_ROBUST_SLOW_H_ |
| 7 |
| 8 #include <stddef.h> |
| 9 #include <vector> |
| 10 |
| 11 #include "ui/gfx/gfx_export.h" |
| 12 |
| 13 class SkBitmap; |
| 14 |
| 15 namespace gfx { |
| 16 |
| 17 // Interface for encoding/decoding JPEG data. This is a wrapper around libjpeg, |
| 18 // which has an inconvenient interface for callers. This is only used for |
| 19 // servicing ChromeUtilityMsg_RobustJPEGDecodeImage and is currently unique |
| 20 // to Chrome OS. |
| 21 class GFX_EXPORT JPEGCodecRobustSlow { |
| 22 public: |
| 23 enum ColorFormat { |
| 24 // 3 bytes per pixel (packed), in RGB order regardless of endianness. |
| 25 // This is the native JPEG format. |
| 26 FORMAT_RGB, |
| 27 |
| 28 // 4 bytes per pixel, in RGBA order in mem regardless of endianness. |
| 29 FORMAT_RGBA, |
| 30 |
| 31 // 4 bytes per pixel, in BGRA order in mem regardless of endianness. |
| 32 // This is the default Windows DIB order. |
| 33 FORMAT_BGRA, |
| 34 |
| 35 // 4 bytes per pixel, it can be either RGBA or BGRA. It depends on the bit |
| 36 // order in kARGB_8888_Config skia bitmap. |
| 37 FORMAT_SkBitmap |
| 38 }; |
| 39 |
| 40 // Decodes the JPEG data contained in input of length input_size. The |
| 41 // decoded data will be placed in *output with the dimensions in *w and *h |
| 42 // on success (returns true). This data will be written in the'format' |
| 43 // format. On failure, the values of these output variables is undefined. |
| 44 static bool Decode(const unsigned char* input, size_t input_size, |
| 45 ColorFormat format, std::vector<unsigned char>* output, |
| 46 int* w, int* h); |
| 47 |
| 48 // Decodes the JPEG data contained in input of length input_size. If |
| 49 // successful, a SkBitmap is created and returned. It is up to the caller |
| 50 // to delete the returned bitmap. |
| 51 static SkBitmap* Decode(const unsigned char* input, size_t input_size); |
| 52 }; |
| 53 |
| 54 } // namespace gfx |
| 55 |
| 56 #endif // UI_GFX_CHROMEOS_CODEC_JPEG_CODEC_ROBUST_SLOW_H_ |
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