144 lines
5.8 KiB
C
144 lines
5.8 KiB
C
/*********************************************************************
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* Portions COPYRIGHT 2016 STMicroelectronics *
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* Portions 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 - 2015 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 V5.32 - Graphical user interface for embedded applications **
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All Intellectual Property rights in the Software belongs to SEGGER.
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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 the following terms:
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The software has been licensed to STMicroelectronics International
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N.V. a Dutch company with a Swiss branch and its headquarters in Plan-
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les-Ouates, Geneva, 39 Chemin du Champ des Filles, Switzerland for the
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purposes of creating libraries for ARM Cortex-M-based 32-bit microcon_
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troller products commercialized by Licensee only, sublicensed and dis_
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tributed under the terms and conditions of the End User License Agree_
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ment supplied by STMicroelectronics International N.V.
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Full source code is available at: www.segger.com
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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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/**
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******************************************************************************
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* @attention
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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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 "GUI_Private.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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/*********************************************************************
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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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/* Required for getting input */
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unsigned NumBytesInBuffer; /* Remaining bytes in buffer */
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const U8 * pBuffer; /* Pointer into buffer for reading data */
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GUI_GET_DATA_FUNC * pfGetData; /* Function pointer */
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void * pParam; /* Parameter pointer passed to function */
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U32 Off; /* Data pointer */
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/* Decompression data */
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U8 aBuffer[258]; /* Input buffer for data block */
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short aCode [(1 << MAX_NUM_LWZ_BITS)]; /* This array stores the LZW codes for the compressed strings */
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U8 aPrefix[(1 << MAX_NUM_LWZ_BITS)]; /* Prefix character of the LZW code. */
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U8 aDecompBuffer[3000]; /* Decompression buffer. The higher the compression, the more bytes are needed in the buffer. */
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U8 * sp; /* Pointer into the decompression buffer */
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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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/* Palette buffer */
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GUI_COLOR 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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/* Default parameter structure for reading data from memory */
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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 int DRAW_FROM_DATABLOCK(GUI_GIF_CONTEXT * pContext, IMAGE_DESCRIPTOR * pDescriptor, int x0, int y0, int Transparency, int Disposal, int Num, int Denom);
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typedef void CLEAR_UNUSED_PIXELS(int x0, int y0, IMAGE_DESCRIPTOR * pDescriptor, GUI_GIF_IMAGE_INFO * pInfo, int Num, int Denom);
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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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int GUI_GIF__ReadData(GUI_GIF_CONTEXT * pContext, unsigned NumBytes, const U8 ** ppData, unsigned StartOfFile);
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int GUI_GIF__GetData(void * p, const U8 ** ppData, unsigned NumBytesReq, U32 Off);
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int GUI_GIF__DrawFromFilePointer(GUI_GIF_CONTEXT * pContext, int x0, int y0, int Index, int Num, int Denom, DRAW_FROM_DATABLOCK pfDrawFromDataBlock, CLEAR_UNUSED_PIXELS pfClearUnusedPixels);
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void GUI_GIF__InitLZW(GUI_GIF_CONTEXT * pContext, int InputCodeSize);
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int GUI_GIF__GetNextByte(GUI_GIF_CONTEXT * pContext);
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#endif /* GUI_GIF_PRIVATE_H */
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