1 // Copyright 2016 PDFium 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 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef CORE_FXCODEC_CODEC_CCODEC_JPEGMODULE_H_ 8 #define CORE_FXCODEC_CODEC_CCODEC_JPEGMODULE_H_ 9 10 #include <csetjmp> 11 #include <memory> 12 13 #include "core/fxcrt/fx_system.h" 14 #include "core/fxcrt/retain_ptr.h" 15 16 class CCodec_ScanlineDecoder; 17 class CFX_DIBSource; 18 19 #ifdef PDF_ENABLE_XFA 20 class CFX_DIBAttribute; 21 #endif // PDF_ENABLE_XFA 22 23 class CCodec_JpegModule { 24 public: 25 class Context { 26 public: 27 virtual ~Context() {} 28 virtual jmp_buf* GetJumpMark() = 0; 29 }; 30 31 std::unique_ptr<CCodec_ScanlineDecoder> CreateDecoder(const uint8_t* src_buf, 32 uint32_t src_size, 33 int width, 34 int height, 35 int nComps, 36 bool ColorTransform); 37 bool LoadInfo(const uint8_t* src_buf, 38 uint32_t src_size, 39 int* width, 40 int* height, 41 int* num_components, 42 int* bits_per_components, 43 bool* color_transform); 44 45 std::unique_ptr<Context> Start(); 46 void Input(Context* pContext, const uint8_t* src_buf, uint32_t src_size); 47 48 #ifndef PDF_ENABLE_XFA 49 int ReadHeader(Context* pContext, int* width, int* height, int* nComps); 50 #else // PDF_ENABLE_XFA 51 int ReadHeader(Context* pContext, 52 int* width, 53 int* height, 54 int* nComps, 55 CFX_DIBAttribute* pAttribute); 56 #endif // PDF_ENABLE_XFA 57 58 bool StartScanline(Context* pContext, int down_scale); 59 bool ReadScanline(Context* pContext, uint8_t* dest_buf); 60 uint32_t GetAvailInput(Context* pContext, uint8_t** avail_buf_ptr); 61 62 #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ 63 static bool JpegEncode(const RetainPtr<CFX_DIBSource>& pSource, 64 uint8_t** dest_buf, 65 size_t* dest_size); 66 #endif // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ 67 }; 68 69 #endif // CORE_FXCODEC_CODEC_CCODEC_JPEGMODULE_H_ 70
