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comparison: gfx/skia/trunk/src/images/bmpdecoderhelper.h
gfx/skia/trunk/src/images/bmpdecoderhelper.h
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| -1:000000000000 | 0:8ceefda9d5ac |
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| 1 | |
| 2 /* | |
| 3 * Copyright 2007 The Android Open Source Project | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef IMAGE_CODEC_BMPDECODERHELPER_H__ | |
| 11 #define IMAGE_CODEC_BMPDECODERHELPER_H__ | |
| 12 | |
| 13 /////////////////////////////////////////////////////////////////////////////// | |
| 14 // this section is my current "glue" between google3 code and android. | |
| 15 // will be fixed soon | |
| 16 | |
| 17 #include "SkTypes.h" | |
| 18 #include <limits.h> | |
| 19 #define DISALLOW_EVIL_CONSTRUCTORS(name) | |
| 20 #define CHECK(predicate) SkASSERT(predicate) | |
| 21 typedef uint8_t uint8; | |
| 22 typedef uint32_t uint32; | |
| 23 | |
| 24 template <typename T> class scoped_array { | |
| 25 private: | |
| 26 T* ptr_; | |
| 27 scoped_array(scoped_array const&); | |
| 28 scoped_array& operator=(const scoped_array&); | |
| 29 | |
| 30 public: | |
| 31 explicit scoped_array(T* p = 0) : ptr_(p) {} | |
| 32 ~scoped_array() { | |
| 33 delete[] ptr_; | |
| 34 } | |
| 35 | |
| 36 void reset(T* p = 0) { | |
| 37 if (p != ptr_) { | |
| 38 delete[] ptr_; | |
| 39 ptr_ = p; | |
| 40 } | |
| 41 } | |
| 42 | |
| 43 T& operator[](int i) const { | |
| 44 return ptr_[i]; | |
| 45 } | |
| 46 }; | |
| 47 | |
| 48 /////////////////////////////////////////////////////////////////////////////// | |
| 49 | |
| 50 namespace image_codec { | |
| 51 | |
| 52 class BmpDecoderCallback { | |
| 53 public: | |
| 54 BmpDecoderCallback() { } | |
| 55 virtual ~BmpDecoderCallback() {} | |
| 56 | |
| 57 /** | |
| 58 * This is called once for an image. It is passed the width and height and | |
| 59 * should return the address of a buffer that is large enough to store | |
| 60 * all of the resulting pixels (widht * height * 3 bytes). If it returns NULL, | |
| 61 * then the decoder will abort, but return true, as the caller has received | |
| 62 * valid dimensions. | |
| 63 */ | |
| 64 virtual uint8* SetSize(int width, int height) = 0; | |
| 65 | |
| 66 private: | |
| 67 DISALLOW_EVIL_CONSTRUCTORS(BmpDecoderCallback); | |
| 68 }; | |
| 69 | |
| 70 class BmpDecoderHelper { | |
| 71 public: | |
| 72 BmpDecoderHelper() { } | |
| 73 ~BmpDecoderHelper() { } | |
| 74 bool DecodeImage(const char* data, | |
| 75 size_t len, | |
| 76 int max_pixels, | |
| 77 BmpDecoderCallback* callback); | |
| 78 | |
| 79 private: | |
| 80 DISALLOW_EVIL_CONSTRUCTORS(BmpDecoderHelper); | |
| 81 | |
| 82 void DoRLEDecode(); | |
| 83 void DoStandardDecode(); | |
| 84 void PutPixel(int x, int y, uint8 col); | |
| 85 | |
| 86 int GetInt(); | |
| 87 int GetShort(); | |
| 88 uint8 GetByte(); | |
| 89 int CalcShiftRight(uint32 mask); | |
| 90 int CalcShiftLeft(uint32 mask); | |
| 91 | |
| 92 const uint8* data_; | |
| 93 size_t pos_; | |
| 94 size_t len_; | |
| 95 int width_; | |
| 96 int height_; | |
| 97 int bpp_; | |
| 98 int pixelPad_; | |
| 99 int rowPad_; | |
| 100 scoped_array<uint8> colTab_; | |
| 101 uint32 redBits_; | |
| 102 uint32 greenBits_; | |
| 103 uint32 blueBits_; | |
| 104 int redShiftRight_; | |
| 105 int greenShiftRight_; | |
| 106 int blueShiftRight_; | |
| 107 int redShiftLeft_; | |
| 108 int greenShiftLeft_; | |
| 109 int blueShiftLeft_; | |
| 110 uint8* output_; | |
| 111 bool inverted_; | |
| 112 }; | |
| 113 | |
| 114 } // namespace | |
| 115 | |
| 116 #endif |
