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_PNGMODULE_H_ 8 #define CORE_FXCODEC_CODEC_ICODEC_PNGMODULE_H_ 9 10 #include "core/fxcrt/fx_system.h" 11 12 class CFX_DIBAttribute; 13 struct FXPNG_Context; 14 15 // Virtual interface to avoid linking in a concrete implementation 16 // if we do not enable this codec. 17 class ICodec_PngModule { 18 public: 19 class Delegate { 20 public: 21 virtual bool PngReadHeader(int width, 22 int height, 23 int bpc, 24 int pass, 25 int* color_type, 26 double* gamma) = 0; 27 virtual bool PngAskScanlineBuf(int line, uint8_t*& src_buf) = 0; 28 virtual void PngFillScanlineBufCompleted(int pass, int line) = 0; 29 }; 30 31 virtual ~ICodec_PngModule() {} 32 33 virtual FXPNG_Context* Start() = 0; 34 virtual void Finish(FXPNG_Context* pContext) = 0; 35 virtual bool Input(FXPNG_Context* pContext, 36 const uint8_t* src_buf, 37 uint32_t src_size, 38 CFX_DIBAttribute* pAttribute) = 0; 39 40 Delegate* GetDelegate() const { return m_pDelegate; } 41 void SetDelegate(Delegate* delegate) { m_pDelegate = delegate; } 42 43 protected: 44 Delegate* m_pDelegate; 45 }; 46 47 #endif // CORE_FXCODEC_CODEC_ICODEC_PNGMODULE_H_ 48
