144 lines
4.7 KiB
C
144 lines
4.7 KiB
C
/*********************************************************************
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* SEGGER Microcontroller GmbH & Co. KG *
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* Solutions for real time microcontroller applications *
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**********************************************************************
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* *
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* (c) 1996 - 2010 SEGGER Microcontroller GmbH & Co. KG *
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* *
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* Internet: www.segger.com Support: support@segger.com *
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* *
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**********************************************************************
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** emWin V5.06 - Graphical user interface for embedded applications **
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emWin is protected by international copyright laws. Knowledge of the
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source code may not be used to write a similar product. This file may
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only be used in accordance with a license and should not be re-
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distributed in any way. We appreciate your understanding and fairness.
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----------------------------------------------------------------------
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File : GUI_GIF_Private.h
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Purpose : Private header file for GUI_GIF... functions
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---------------------------END-OF-HEADER------------------------------
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*/
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#ifndef GUI_GIF_PRIVATE_H
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#define GUI_GIF_PRIVATE_H
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#include "system/includes.h"
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/*#include "GUI_Private.h"*/
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/*#include "header.h"*/
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/*********************************************************************
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*
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* Defines
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*
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**********************************************************************
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*/
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#define MAX_NUM_LWZ_BITS 12
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typedef int GUI_GET_DATA_FUNC(void *p, const u8 **ppData, unsigned NumBytes, u32 Offset);
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/*********************************************************************
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*
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* Types
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*
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**********************************************************************
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*/
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/* Context structure */
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typedef struct {
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unsigned NumBytesInBuffer; /* 缓冲区中的剩余字节 */
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const u8 *pBuffer; /* 指向缓冲区以读取数据的指针 */
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GUI_GET_DATA_FUNC *pfGetData; /* 函数指针 */
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void *pParam; /* 传递给函数的参数指针*/
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u32 Offset; /* 数据指针 */
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u8 aBuffer[258]; /* 数据块的输入缓冲区 */
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short aCode [(1 << MAX_NUM_LWZ_BITS)]; /* 这个数组存储压缩字符串的LZW代码*/
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u8 aPrefix[(1 << MAX_NUM_LWZ_BITS)]; /* LZW代码的前缀字符 */
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u8 aDecompBuffer[3000]; /* 解压缩缓冲区。压缩越高，缓冲区中需要的字节就越多. */
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u8 *sp; /* 指向解压缓冲区的指针 */
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int CurBit;
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int LastBit;
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int GetDone;
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int LastByte;
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int ReturnClear;
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int CodeSize;
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int SetCodeSize;
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int MaxCode;
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int MaxCodeSize;
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int ClearCode;
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int EndCode;
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int FirstCode;
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int OldCode;
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int BkColorIndex;
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/* 调色板缓冲区 */
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int aColorTable[256];
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} GUI_GIF_CONTEXT;
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typedef struct {
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int XPos;
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int YPos;
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int XSize;
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int YSize;
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int Flags;
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int NumColors;
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} IMAGE_DESCRIPTOR;
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/* 从内存中读取数据的默认参数结构 */
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typedef struct {
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const u8 *pFileData;
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u32 FileSize;
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} GUI_GIF_PARAM;
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typedef struct {
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int xPos;
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int yPos;
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int xSize;
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int ySize;
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int Delay;
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int NumImages;
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} GUI_GIF_IMAGE_INFO;
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typedef struct {
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int xSize;
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int ySize;
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int NumImages;
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} GUI_GIF_INFO;
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enum {
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TYPE_RGB888 = 1,
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TYPE_RGB565
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};
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/*********************************************************************
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*
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* Private data
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*
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**********************************************************************
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*/
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extern const int GUI_GIF__aInterlaceOffset[4];
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extern const int GUI_GIF__aInterlaceYPos[4];
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/*********************************************************************
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*
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* Interface
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*
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**********************************************************************
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*/
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static int GUI_GIF__ReadData(GUI_GIF_CONTEXT *pContext, unsigned NumBytes, const u8 **ppData, unsigned StartOfFile);
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static int GUI_GIF__GetData(void *p, const u8 **ppData, unsigned NumBytesReq, u32 Offset);
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static void GUI_GIF__InitLZW(GUI_GIF_CONTEXT *pContext, int InputCodeSize);
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static int GUI_GIF__GetNextByte(GUI_GIF_CONTEXT *pContext);
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int Gif_to_Picture(const void *pGIF, u32 NumBytes, GUI_GIF_IMAGE_INFO *Info, char *inbuf, int type, int Index);
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char *Gif_to_Gif(const void *pGIF, u32 NumBytes, GUI_GIF_IMAGE_INFO *in_Info, GUI_GIF_IMAGE_INFO *out_Info, char *inbuf, int type, int Index);
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int GUI_GIF_GetInfo(const void *pGIF, u32 NumBytes, GUI_GIF_IMAGE_INFO *pInfo);
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#endif /* GUI_GIF_PRIVATE_H */
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