1// Copyright 2014 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 _FX_CODEC_PROVIDER_H_
8#define _FX_CODEC_PROVIDER_H_
9class IFX_JpegProvider
10{
11public:
12
13    virtual void		Release() = 0;
14
15    virtual void*		CreateDecoder(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height, int nComps, FX_BOOL ColorTransform) = 0;
16
17
18    virtual void		DestroyDecoder(void* pDecoder) = 0;
19
20    virtual void		DownScale(void* pDecoder, int dest_width, int dest_height) = 0;
21
22    virtual FX_BOOL		Rewind(void* pDecoder) = 0;
23
24    virtual FX_LPBYTE	GetNextLine(void* pDecoder) = 0;
25
26    virtual FX_DWORD	GetSrcOffset(void* pDecoder) = 0;
27
28
29    virtual FX_BOOL		LoadInfo(FX_LPCBYTE src_buf, FX_DWORD src_size, int& width, int& height,
30                                 int& num_components, int& bits_per_components, FX_BOOL& color_transform,
31                                 FX_LPBYTE* icc_buf_ptr = NULL, FX_DWORD* icc_length = NULL) = 0;
32
33    virtual FX_BOOL		Encode(const class CFX_DIBSource* pSource, FX_LPBYTE& dest_buf, FX_STRSIZE& dest_size, int quality = 75,
34                               FX_LPCBYTE icc_buf = NULL, FX_DWORD icc_length = 0) = 0;
35
36    virtual void*		Start() = 0;
37
38    virtual void		Finish(void* pContext) = 0;
39
40    virtual void		Input(void* pContext, FX_LPCBYTE src_buf, FX_DWORD src_size) = 0;
41
42    virtual int			ReadHeader(void* pContext, int* width, int* height, int* nComps) = 0;
43
44
45    virtual int			StartScanline(void* pContext, int down_scale) = 0;
46
47
48    virtual FX_BOOL		ReadScanline(void* pContext, FX_LPBYTE dest_buf) = 0;
49
50
51    virtual FX_DWORD	GetAvailInput(void* pContext, FX_LPBYTE* avail_buf_ptr = NULL) = 0;
52};
53#endif
54