1 // Copyright 2017 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_ICODEC_GIFMODULE_H_ 8 #define CORE_FXCODEC_CODEC_ICODEC_GIFMODULE_H_ 9 10 #include "core/fxcrt/fx_coordinates.h" 11 #include "core/fxcrt/fx_system.h" 12 13 class CFX_DIBAttribute; 14 struct FXGIF_Context; 15 16 // Virtual interface to avoid linking in a concrete implementation 17 // if we do not enable this codec. 18 class ICodec_GifModule { 19 public: 20 class Delegate { 21 public: 22 virtual void GifRecordCurrentPosition(uint32_t& cur_pos) = 0; 23 virtual uint8_t* GifAskLocalPaletteBuf(int32_t frame_num, 24 int32_t pal_size) = 0; 25 virtual bool GifInputRecordPositionBuf(uint32_t rcd_pos, 26 const FX_RECT& img_rc, 27 int32_t pal_num, 28 void* pal_ptr, 29 int32_t delay_time, 30 bool user_input, 31 int32_t trans_index, 32 int32_t disposal_method, 33 bool interlace) = 0; 34 virtual void GifReadScanline(int32_t row_num, uint8_t* row_buf) = 0; 35 }; 36 37 virtual ~ICodec_GifModule() {} 38 39 virtual FXGIF_Context* Start() = 0; 40 virtual void Finish(FXGIF_Context* pContext) = 0; 41 virtual uint32_t GetAvailInput(FXGIF_Context* pContext, 42 uint8_t** avail_buf_ptr = nullptr) = 0; 43 44 virtual void Input(FXGIF_Context* pContext, 45 const uint8_t* src_buf, 46 uint32_t src_size) = 0; 47 48 virtual int32_t ReadHeader(FXGIF_Context* pContext, 49 int* width, 50 int* height, 51 int* pal_num, 52 void** pal_pp, 53 int* bg_index, 54 CFX_DIBAttribute* pAttribute) = 0; 55 56 virtual int32_t LoadFrameInfo(FXGIF_Context* pContext, int* frame_num) = 0; 57 virtual int32_t LoadFrame(FXGIF_Context* pContext, 58 int frame_num, 59 CFX_DIBAttribute* pAttribute) = 0; 60 61 Delegate* GetDelegate() const { return m_pDelegate; } 62 void SetDelegate(Delegate* pDelegate) { m_pDelegate = pDelegate; } 63 64 protected: 65 Delegate* m_pDelegate; 66 }; 67 68 #endif // CORE_FXCODEC_CODEC_ICODEC_GIFMODULE_H_ 69
