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_GIFMODULE_H_ 8 #define CORE_FXCODEC_CODEC_CCODEC_GIFMODULE_H_ 9 10 #include <memory> 11 #include <utility> 12 13 #include "core/fxcodec/gif/cfx_gif.h" 14 #include "core/fxcrt/fx_coordinates.h" 15 #include "core/fxcrt/fx_system.h" 16 17 class CFX_DIBAttribute; 18 19 class CCodec_GifModule { 20 public: 21 class Context { 22 public: 23 virtual ~Context() {} 24 }; 25 26 class Delegate { 27 public: 28 virtual void GifRecordCurrentPosition(uint32_t& cur_pos) = 0; 29 virtual bool GifInputRecordPositionBuf(uint32_t rcd_pos, 30 const FX_RECT& img_rc, 31 int32_t pal_num, 32 void* pal_ptr, 33 int32_t delay_time, 34 bool user_input, 35 int32_t trans_index, 36 int32_t disposal_method, 37 bool interlace) = 0; 38 virtual void GifReadScanline(int32_t row_num, uint8_t* row_buf) = 0; 39 }; 40 41 CCodec_GifModule(); 42 ~CCodec_GifModule(); 43 44 std::unique_ptr<Context> Start(Delegate* pDelegate); 45 uint32_t GetAvailInput(Context* context, uint8_t** avail_buf_ptr = nullptr); 46 void Input(Context* context, const uint8_t* src_buf, uint32_t src_size); 47 CFX_GifDecodeStatus ReadHeader(Context* context, 48 int* width, 49 int* height, 50 int* pal_num, 51 void** pal_pp, 52 int* bg_index, 53 CFX_DIBAttribute* pAttribute); 54 std::pair<CFX_GifDecodeStatus, size_t> LoadFrameInfo(Context* context); 55 CFX_GifDecodeStatus LoadFrame(Context* context, 56 size_t frame_num, 57 CFX_DIBAttribute* pAttribute); 58 }; 59 60 #endif // CORE_FXCODEC_CODEC_CCODEC_GIFMODULE_H_ 61
