1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/images/bmpdecoderhelper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,116 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2007 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef IMAGE_CODEC_BMPDECODERHELPER_H__
1.14 +#define IMAGE_CODEC_BMPDECODERHELPER_H__
1.15 +
1.16 +///////////////////////////////////////////////////////////////////////////////
1.17 +// this section is my current "glue" between google3 code and android.
1.18 +// will be fixed soon
1.19 +
1.20 +#include "SkTypes.h"
1.21 +#include <limits.h>
1.22 +#define DISALLOW_EVIL_CONSTRUCTORS(name)
1.23 +#define CHECK(predicate) SkASSERT(predicate)
1.24 +typedef uint8_t uint8;
1.25 +typedef uint32_t uint32;
1.26 +
1.27 +template <typename T> class scoped_array {
1.28 +private:
1.29 + T* ptr_;
1.30 + scoped_array(scoped_array const&);
1.31 + scoped_array& operator=(const scoped_array&);
1.32 +
1.33 +public:
1.34 + explicit scoped_array(T* p = 0) : ptr_(p) {}
1.35 + ~scoped_array() {
1.36 + delete[] ptr_;
1.37 + }
1.38 +
1.39 + void reset(T* p = 0) {
1.40 + if (p != ptr_) {
1.41 + delete[] ptr_;
1.42 + ptr_ = p;
1.43 + }
1.44 + }
1.45 +
1.46 + T& operator[](int i) const {
1.47 + return ptr_[i];
1.48 + }
1.49 +};
1.50 +
1.51 +///////////////////////////////////////////////////////////////////////////////
1.52 +
1.53 +namespace image_codec {
1.54 +
1.55 +class BmpDecoderCallback {
1.56 + public:
1.57 + BmpDecoderCallback() { }
1.58 + virtual ~BmpDecoderCallback() {}
1.59 +
1.60 + /**
1.61 + * This is called once for an image. It is passed the width and height and
1.62 + * should return the address of a buffer that is large enough to store
1.63 + * all of the resulting pixels (widht * height * 3 bytes). If it returns NULL,
1.64 + * then the decoder will abort, but return true, as the caller has received
1.65 + * valid dimensions.
1.66 + */
1.67 + virtual uint8* SetSize(int width, int height) = 0;
1.68 +
1.69 + private:
1.70 + DISALLOW_EVIL_CONSTRUCTORS(BmpDecoderCallback);
1.71 +};
1.72 +
1.73 +class BmpDecoderHelper {
1.74 + public:
1.75 + BmpDecoderHelper() { }
1.76 + ~BmpDecoderHelper() { }
1.77 + bool DecodeImage(const char* data,
1.78 + size_t len,
1.79 + int max_pixels,
1.80 + BmpDecoderCallback* callback);
1.81 +
1.82 + private:
1.83 + DISALLOW_EVIL_CONSTRUCTORS(BmpDecoderHelper);
1.84 +
1.85 + void DoRLEDecode();
1.86 + void DoStandardDecode();
1.87 + void PutPixel(int x, int y, uint8 col);
1.88 +
1.89 + int GetInt();
1.90 + int GetShort();
1.91 + uint8 GetByte();
1.92 + int CalcShiftRight(uint32 mask);
1.93 + int CalcShiftLeft(uint32 mask);
1.94 +
1.95 + const uint8* data_;
1.96 + size_t pos_;
1.97 + size_t len_;
1.98 + int width_;
1.99 + int height_;
1.100 + int bpp_;
1.101 + int pixelPad_;
1.102 + int rowPad_;
1.103 + scoped_array<uint8> colTab_;
1.104 + uint32 redBits_;
1.105 + uint32 greenBits_;
1.106 + uint32 blueBits_;
1.107 + int redShiftRight_;
1.108 + int greenShiftRight_;
1.109 + int blueShiftRight_;
1.110 + int redShiftLeft_;
1.111 + int greenShiftLeft_;
1.112 + int blueShiftLeft_;
1.113 + uint8* output_;
1.114 + bool inverted_;
1.115 +};
1.116 +
1.117 +} // namespace
1.118 +
1.119 +#endif
