| // Copyright 2014 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #ifndef CORE_FXCODEC_LBMP_FX_BMP_H_ |
| #define CORE_FXCODEC_LBMP_FX_BMP_H_ |
| |
| #include <setjmp.h> |
| #include <vector> |
| |
| #include "core/fxcodec/codec/ccodec_bmpmodule.h" |
| #include "core/fxcrt/fx_basic.h" |
| |
| #define BMP_WIDTHBYTES(width, bitCount) ((width * bitCount) + 31) / 32 * 4 |
| #define BMP_PAL_ENCODE(a, r, g, b) \ |
| (((uint32_t)(a) << 24) | ((r) << 16) | ((g) << 8) | (b)) |
| #define BMP_D_STATUS_HEADER 0x01 |
| #define BMP_D_STATUS_PAL 0x02 |
| #define BMP_D_STATUS_DATA_PRE 0x03 |
| #define BMP_D_STATUS_DATA 0x04 |
| #define BMP_D_STATUS_TAIL 0x00 |
| #define BMP_SIGNATURE 0x4D42 |
| #define BMP_PAL_NEW 0 |
| #define BMP_PAL_OLD 1 |
| #define RLE_MARKER 0 |
| #define RLE_EOL 0 |
| #define RLE_EOI 1 |
| #define RLE_DELTA 2 |
| #define BMP_RGB 0L |
| #define BMP_RLE8 1L |
| #define BMP_RLE4 2L |
| #define BMP_BITFIELDS 3L |
| #define BMP_BIT_555 0 |
| #define BMP_BIT_565 1 |
| #define BMP_MAX_ERROR_SIZE 256 |
| // Limit width to (MAXINT32 - 31) / 32 |
| #define BMP_MAX_WIDTH 67108863 |
| #pragma pack(1) |
| typedef struct tagBmpFileHeader { |
| uint16_t bfType; |
| uint32_t bfSize; |
| uint16_t bfReserved1; |
| uint16_t bfReserved2; |
| uint32_t bfOffBits; |
| } BmpFileHeader, *BmpFileHeaderPtr; |
| typedef struct tagBmpCoreHeader { |
| uint32_t bcSize; |
| uint16_t bcWidth; |
| uint16_t bcHeight; |
| uint16_t bcPlanes; |
| uint16_t bcBitCount; |
| } BmpCoreHeader, *BmpCoreHeaderPtr; |
| typedef struct tagBmpInfoHeader { |
| uint32_t biSize; |
| int32_t biWidth; |
| int32_t biHeight; |
| uint16_t biPlanes; |
| uint16_t biBitCount; |
| uint32_t biCompression; |
| uint32_t biSizeImage; |
| int32_t biXPelsPerMeter; |
| int32_t biYPelsPerMeter; |
| uint32_t biClrUsed; |
| uint32_t biClrImportant; |
| } BmpInfoHeader, *BmpInfoHeaderPtr; |
| #pragma pack() |
| |
| class BMPDecompressor { |
| public: |
| BMPDecompressor(); |
| ~BMPDecompressor(); |
| |
| void Error(const char* err_msg); |
| int32_t DecodeImage(); |
| int32_t ReadHeader(); |
| void SetInputBuffer(uint8_t* src_buf, uint32_t src_size); |
| uint32_t GetAvailInput(uint8_t** avail_buf); |
| |
| jmp_buf jmpbuf; |
| char* err_ptr; |
| |
| void* context_ptr; |
| |
| BmpFileHeaderPtr bmp_header_ptr; |
| BmpInfoHeaderPtr bmp_infoheader_ptr; |
| std::vector<uint8_t> out_row_buffer; |
| |
| uint32_t width; |
| uint32_t height; |
| uint32_t compress_flag; |
| int32_t components; |
| size_t src_row_bytes; |
| size_t out_row_bytes; |
| uint16_t bitCounts; |
| uint32_t color_used; |
| bool imgTB_flag; |
| int32_t pal_num; |
| int32_t pal_type; |
| uint32_t* pal_ptr; |
| uint32_t data_size; |
| uint32_t img_data_offset; |
| uint32_t img_ifh_size; |
| size_t row_num; |
| size_t col_num; |
| int32_t dpi_x; |
| int32_t dpi_y; |
| uint32_t mask_red; |
| uint32_t mask_green; |
| uint32_t mask_blue; |
| |
| uint8_t* next_in; |
| uint32_t avail_in; |
| uint32_t skip_size; |
| int32_t decode_status; |
| |
| private: |
| bool GetDataPosition(uint32_t cur_pos); |
| void ReadScanline(uint32_t row_num, const std::vector<uint8_t>& row_buf); |
| int32_t DecodeRGB(); |
| int32_t DecodeRLE8(); |
| int32_t DecodeRLE4(); |
| uint8_t* ReadData(uint8_t** des_buf, uint32_t data_size); |
| void SaveDecodingStatus(int32_t status); |
| bool ValidateColorIndex(uint8_t val); |
| bool ValidateFlag() const; |
| }; |
| |
| class CBmpContext : public CCodec_BmpModule::Context { |
| public: |
| CBmpContext(CCodec_BmpModule* pModule, CCodec_BmpModule::Delegate* pDelegate); |
| ~CBmpContext() override; |
| |
| BMPDecompressor m_Bmp; |
| CFX_UnownedPtr<CCodec_BmpModule> const m_pModule; |
| CFX_UnownedPtr<CCodec_BmpModule::Delegate> const m_pDelegate; |
| char m_szLastError[256]; |
| }; |
| |
| uint16_t GetWord_LSBFirst(uint8_t* p); |
| |
| #endif // CORE_FXCODEC_LBMP_FX_BMP_H_ |