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527 lines
24 KiB
C
527 lines
24 KiB
C
/*
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* @cond
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* The following section will be excluded from the documentation.
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*/
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#define __BMPDECODER_C__
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/******************************************************************************
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* FileName: BmpDecoder.c
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* Dependencies: Image decoding library; project requires File System library
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* Processor: PIC24/dsPIC30/dsPIC33/PIC32MX
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* Compiler: C30 v2.01/C32 v0.00.18
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* Company: Microchip Technology, Inc.
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* Software License Agreement
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*
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* Copyright <20> 2008 Microchip Technology Inc. All rights reserved.
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* Microchip licenses to you the right to use, modify, copy and distribute
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* Software only when embedded on a Microchip microcontroller or digital
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* signal controller, which is integrated into your product or third party
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* product (pursuant to the sublicense terms in the accompanying license
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* agreement).
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*
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* You should refer to the license agreement accompanying this Software
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* for additional information regarding your rights and obligations.
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*
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* SOFTWARE AND DOCUMENTATION ARE PROVIDED <20>AS IS<49> WITHOUT WARRANTY OF ANY
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* KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
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* OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
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* PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
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* OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
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* BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
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* DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
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* INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
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* COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
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* CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
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* OR OTHER SIMILAR COSTS.
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Author Date Comments
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--------------------------------------------------------------------------------
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Pradeep Budagutta 03-Mar-2008 First release
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*******************************************************************************/
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//#include "GenericTypeDefs.h"
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#include "MMBasic_Includes.h"
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#include "Hardware_Includes.h"
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//** SD CARD INCLUDES ***********************************************************
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#include "ff.h"
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#define IMG_FILE fnbr
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int IMG_FREAD(int fnbr, void *buff, int count, unsigned int *read){
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if(filesource[IMG_FILE]==FATFSFILE){
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return f_read(FileTable[IMG_FILE].fptr, buff, count, (UINT *)read);
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} else {
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int n=lfs_file_read(&lfs, FileTable[IMG_FILE].lfsptr, buff, count);
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if(n>=0)return 0;
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else return n;
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}
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}
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#define IMG_vSetboundaries()
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#define IMG_vLoopCallback()
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#define IMG_vCheckAndAbort() CheckAbort()
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union colourmap
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{
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char rgbbytes[4];
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unsigned int rgb;
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} colour, colour2;
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#define IMG_vSetColor(red, green, blue) {colour.rgbbytes[2] = red; colour.rgbbytes[1] = green; colour.rgbbytes[0] = blue;}
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#define IMG_vSetColor2(red, green, blue) {colour2.rgbbytes[2] = red; colour2.rgbbytes[1] = green; colour2.rgbbytes[0] = blue;}
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#define IMG_vPutPixel(xx, yy) DrawPixel(xx + x, yy + y, colour.rgb)
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#define IMG_vPutPixel2(xx, yy) DrawPixel(xx + x, yy + y, colour2.rgb)
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#define LONG long
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int IMG_wImageWidth, IMG_wImageHeight;
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int bufpos;
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/*************************/
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/**** DATA STRUCTURES ****/
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/*************************/
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typedef struct _BMPDECODER
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{
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LONG lWidth;
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LONG lHeight;
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LONG lImageOffset;
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WORD wPaletteEntries;
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BYTE bBitsPerPixel;
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BYTE bHeaderType;
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BYTE blBmMarkerFlag : 1;
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BYTE blCompressionType : 3;
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BYTE bNumOfPlanes : 3;
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BYTE b16bit565flag : 1;
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BYTE aPalette[256][3]; /* Each palette entry has RGB */
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} BMPDECODER;
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/**************************/
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/******* FUNCTIONS *******/
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/**************************/
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/*******************************************************************************
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Function: void BDEC_vResetData(BMPDECODER *pBmpDec)
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Precondition: None
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Overview: This function resets the variables so that new Bitmap image
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can be decoded
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Input: Bitmap decoder's data structure
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Output: None
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*******************************************************************************/
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void BDEC_vResetData(BMPDECODER *pBmpDec)
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{
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pBmpDec->lWidth = 0;
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pBmpDec->lHeight = 0;
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pBmpDec->lImageOffset = 0;
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pBmpDec->wPaletteEntries = 0;
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pBmpDec->bBitsPerPixel = 0;
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pBmpDec->bHeaderType = 0;
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pBmpDec->blBmMarkerFlag = 0;
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pBmpDec->blCompressionType = 0;
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pBmpDec->bNumOfPlanes = 0;
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pBmpDec->b16bit565flag = 0;
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}
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/*******************************************************************************
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Function: BYTE BDEC_bReadHeader(BMPDECODER *pBmpDec)
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Precondition: None
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Overview: This function reads the Bitmap file header and
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fills the data structure
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Input: Bitmap decoder's data structure
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Output: Error code - '0' means no error
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*******************************************************************************/
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BYTE BDEC_bReadHeader(BMPDECODER *pBmpDec, int fnbr)
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{
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BYTE bByte1, bByte2;
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WORD wWord;
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LONG lLong;
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unsigned int nbr;
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FSerror = IMG_FREAD(IMG_FILE, &bByte1, 1, &nbr); /* Marker */
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FSerror = IMG_FREAD(IMG_FILE, &bByte2, 1, &nbr); /* Marker */
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if(bByte1 == 'B' && bByte2 == 'M')
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{
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pBmpDec->blBmMarkerFlag = 1;
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}
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else
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{
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return(100);
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}
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* File length */
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FSerror = IMG_FREAD(IMG_FILE, &wWord, 2, &nbr); /* Reserved */
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FSerror = IMG_FREAD(IMG_FILE, &wWord, 2, &nbr); /* Reserved */
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* Image offset */
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pBmpDec->lImageOffset = lLong;
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FSerror = IMG_FREAD(IMG_FILE,&lLong, 4, &nbr); /* Header length */
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pBmpDec->bHeaderType = (BYTE)lLong;
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if(pBmpDec->bHeaderType >= 40)
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{
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* Image Width */
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pBmpDec->lWidth = lLong;
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* Image Height */
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pBmpDec->lHeight = lLong;
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FSerror = IMG_FREAD(IMG_FILE, &wWord, 2, &nbr); /* Number of Planes */
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pBmpDec->bNumOfPlanes = (BYTE)wWord;
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FSerror = IMG_FREAD(IMG_FILE, &wWord, 2, &nbr); /* Bits per Pixel */
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pBmpDec->bBitsPerPixel = (BYTE)wWord;
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* Compression info */
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pBmpDec->blCompressionType = (BYTE)lLong;
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* Image length */
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* xPixels per metre */
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* yPixels per metre */
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* Palette entries */
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pBmpDec->wPaletteEntries = (WORD)lLong;
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if(pBmpDec->wPaletteEntries == 0)
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{
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WORD wTemp = (WORD)(pBmpDec->lImageOffset - 14 - 40)/4;
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if(wTemp > 0)
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{
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pBmpDec->wPaletteEntries = wTemp; /* This is because of a bug in MSPAINT */
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}
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}
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* Important colors */
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if(pBmpDec->bBitsPerPixel == 16 && pBmpDec->bHeaderType > 40)
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{
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FSerror = IMG_FREAD(IMG_FILE, &lLong, 4, &nbr); /* Red mask */
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if((WORD)lLong == 0xF800)
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{
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pBmpDec->b16bit565flag = 1;
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}
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}
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// IMG_FSEEK(&nbr, pBmpDec->bHeaderType + 14, 0);
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if(pBmpDec->wPaletteEntries <= 256)
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{
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WORD wCounter;
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for(wCounter = 0; wCounter < pBmpDec->wPaletteEntries; wCounter++)
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{
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FSerror = IMG_FREAD(IMG_FILE, &pBmpDec->aPalette[wCounter][2], 1, &nbr); /* R */
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FSerror = IMG_FREAD(IMG_FILE, &pBmpDec->aPalette[wCounter][1], 1, &nbr); /* G */
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FSerror = IMG_FREAD(IMG_FILE, &pBmpDec->aPalette[wCounter][0], 1, &nbr); /* B */
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FSerror = IMG_FREAD(IMG_FILE, &wWord, 1, &nbr); /* Dummy */
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}
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}
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}
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return(0);
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}
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/*******************************************************************************
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Function: BYTE BMP_bDecode(IMG_FILE *pFile)
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Precondition: None
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Overview: This function decodes and displays a Bitmap image
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Input: Image file
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Output: Error code - '0' means no error
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*******************************************************************************/
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BYTE BMP_bDecode(int x, int y, int fnbr)
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{
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BMPDECODER BmpDec;
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WORD wX, wY;
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BYTE bPadding;
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unsigned int nbr;
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BDEC_vResetData(&BmpDec);
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BDEC_bReadHeader(&BmpDec, fnbr);
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if(BmpDec.blBmMarkerFlag == 0 || BmpDec.bHeaderType < 40 || (BmpDec.blCompressionType != 0 && BmpDec.blCompressionType != 2 && BmpDec.blCompressionType != 3))
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{
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return 100;
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}
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IMG_wImageWidth = (WORD)BmpDec.lWidth;
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IMG_wImageHeight = (WORD)BmpDec.lHeight;
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IMG_vSetboundaries();
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char *linebuff=GetMemory(IMG_wImageWidth*3); //get a line buffer
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// IMG_FSEEK(pFile, BmpDec.lImageOffset, 0);
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if(BmpDec.wPaletteEntries == 0 && BmpDec.bBitsPerPixel == 8) /* Grayscale Image */
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{
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bPadding = (4 - (BmpDec.lWidth % 4))%4;
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for(wY = 0; wY < BmpDec.lHeight; wY++)
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{
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IMG_vLoopCallback();
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IMG_vCheckAndAbort();
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for(wX = 0; wX < BmpDec.lWidth; wX++)
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{
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BYTE bY;
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FSerror = IMG_FREAD(IMG_FILE, &bY, 1, &nbr); /* Y */
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IMG_vSetColor(bY, bY, bY);
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IMG_vPutPixel(wX, BmpDec.lHeight - wY - 1);
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}
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for(wX = 0; wX < bPadding; wX++)
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{
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BYTE bValue;
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FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
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}
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}
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}
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else if(BmpDec.bBitsPerPixel == 16) /* 16-bit Color Image */
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{
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bPadding = (4 - ((BmpDec.lWidth*2) % 4))%4;
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for(wY = 0; wY < BmpDec.lHeight; wY++)
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{
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IMG_vLoopCallback();
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IMG_vCheckAndAbort();
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for(wX = 0; wX < BmpDec.lWidth; wX++)
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{
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WORD wColor;
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BYTE bR, bG, bB;
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FSerror = IMG_FREAD(IMG_FILE, &wColor, 2, &nbr); /* RGB */
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if(BmpDec.b16bit565flag == 1)
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{
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bR = (wColor >> 11) << 3;
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bG = ((wColor & 0x07E0) >> 5) << 2;
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bB = (wColor & 0x001F) << 3;
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}
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else
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{
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bR = ((wColor & 0x7FFF) >> 10) << 3;
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bG = ((wColor & 0x03E0) >> 5) << 3;
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bB = (wColor & 0x001F) << 3;
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}
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IMG_vSetColor(bR, bG, bB);
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IMG_vPutPixel(wX, BmpDec.lHeight - wY - 1);
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}
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for(wX = 0; wX < bPadding; wX++)
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{
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BYTE bValue;
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FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
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}
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}
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}
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else if(BmpDec.bBitsPerPixel == 24) /* True color Image */
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{
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int pp;
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bPadding = (4 - ((BmpDec.lWidth*3) % 4))%4;
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for(wY = 0; wY < BmpDec.lHeight; wY++)
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{
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IMG_vLoopCallback();
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IMG_vCheckAndAbort();
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FSerror = IMG_FREAD(IMG_FILE, linebuff, BmpDec.lWidth*3, &nbr); /* B */
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pp=0;
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for(wX = 0; wX < BmpDec.lWidth; wX++)
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{
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colour.rgbbytes[0]=linebuff[pp++];
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colour.rgbbytes[1]=linebuff[pp++];
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colour.rgbbytes[2]=linebuff[pp++];
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IMG_vPutPixel(wX, BmpDec.lHeight - wY - 1);
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}
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for(wX = 0; wX < bPadding; wX++)
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{
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BYTE bValue;
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FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
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}
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}
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}
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else if(BmpDec.wPaletteEntries != 0 && BmpDec.bBitsPerPixel == 1) /* B/W Image */
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{
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WORD wBytesPerRow = BmpDec.lWidth/8;
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BYTE bAdditionalBitsPerRow = BmpDec.lWidth % 8;
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bPadding = (4 - ((wBytesPerRow + (bAdditionalBitsPerRow?1:0)) % 4))%4;
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for(wY = 0; wY < BmpDec.lHeight; wY++)
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{
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BYTE bBits, bValue;
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IMG_vLoopCallback();
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IMG_vCheckAndAbort();
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for(wX = 0; wX < wBytesPerRow; wX++)
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{
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FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
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for(bBits = 0; bBits < 8; bBits++)
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{
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BYTE bIndex = (bValue & (0x80 >> bBits))?1:0;
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IMG_vSetColor(BmpDec.aPalette[bIndex][0], BmpDec.aPalette[bIndex][1], BmpDec.aPalette[bIndex][2]);
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IMG_vPutPixel(wX*8+bBits, BmpDec.lHeight - wY - 1);
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}
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}
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if(bAdditionalBitsPerRow > 0)
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{
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FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
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for(bBits = 0; bBits < bAdditionalBitsPerRow; bBits++)
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{
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BYTE bIndex = (bValue & (0x80 >> bBits))?1:0;
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IMG_vSetColor(BmpDec.aPalette[bIndex][0], BmpDec.aPalette[bIndex][1], BmpDec.aPalette[bIndex][2]);
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IMG_vPutPixel(wX*8+bBits, BmpDec.lHeight - wY - 1);
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}
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}
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for(wX = 0; wX < bPadding; wX++)
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{
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BYTE bValue;
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FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
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}
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}
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}
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else if(BmpDec.wPaletteEntries != 0 && BmpDec.bBitsPerPixel == 4 && BmpDec.blCompressionType != 2) /* 16 colors Image */
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{
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WORD wBytesPerRow = BmpDec.lWidth/2;
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BYTE bAdditionalNibblePerRow = BmpDec.lWidth % 2;
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bPadding = (4 - ((wBytesPerRow + bAdditionalNibblePerRow) % 4))%4;
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for(wY = 0; wY < BmpDec.lHeight; wY++)
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{
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IMG_vLoopCallback();
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IMG_vCheckAndAbort();
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for(wX = 0; wX < wBytesPerRow; wX++)
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{
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BYTE bIndex, bValue;
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FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
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bIndex = bValue >> 4;
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IMG_vSetColor(BmpDec.aPalette[bIndex][0], BmpDec.aPalette[bIndex][1], BmpDec.aPalette[bIndex][2]);
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IMG_vPutPixel(wX*2, BmpDec.lHeight - wY - 1);
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bIndex = bValue & 0x0F;
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IMG_vSetColor(BmpDec.aPalette[bIndex][0], BmpDec.aPalette[bIndex][1], BmpDec.aPalette[bIndex][2]);
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IMG_vPutPixel(wX*2+1, BmpDec.lHeight - wY - 1);
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}
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if(bAdditionalNibblePerRow)
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{
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BYTE bIndex, bValue;
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FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr); /* Bits8 */
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bIndex = bValue >> 4;
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IMG_vSetColor(BmpDec.aPalette[bIndex][0], BmpDec.aPalette[bIndex][1], BmpDec.aPalette[bIndex][2]);
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IMG_vPutPixel(wX*2, BmpDec.lHeight - wY - 1);
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}
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for(wX = 0; wX < bPadding; wX++)
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{
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BYTE bValue;
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FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
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}
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}
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}
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else if(BmpDec.wPaletteEntries != 0 && BmpDec.bBitsPerPixel == 4 && BmpDec.blCompressionType==2) /* 16 colors Image */
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{
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BYTE bIndex;
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int c;
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unsigned char b[2];
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for(wY = 0; wY < BmpDec.lHeight; wY++)
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{
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IMG_vCheckAndAbort();
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wX=0;
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do {
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FSerror = IMG_FREAD(IMG_FILE, b, 2, &nbr);
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c=b[0];
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bIndex = b[1] >> 4;
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IMG_vSetColor(BmpDec.aPalette[bIndex][0], BmpDec.aPalette[bIndex][1], BmpDec.aPalette[bIndex][2]);
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bIndex = b[1] & 0xf;
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IMG_vSetColor2(BmpDec.aPalette[bIndex][0], BmpDec.aPalette[bIndex][1], BmpDec.aPalette[bIndex][2]);
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while(c){
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IMG_vPutPixel(wX++, BmpDec.lHeight - wY - 1);
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IMG_vPutPixel2(wX++, BmpDec.lHeight - wY - 1);
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c-=2;
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}
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} while(!(b[0]==0 && b[1]==0));
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}
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}
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else if(BmpDec.wPaletteEntries != 0 && BmpDec.bBitsPerPixel == 8) /* 256 colors Image */
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{
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bPadding = (4 - (BmpDec.lWidth % 4))%4;
|
||
for(wY = 0; wY < BmpDec.lHeight; wY++)
|
||
{
|
||
IMG_vLoopCallback(); IMG_vCheckAndAbort();
|
||
for(wX = 0; wX < BmpDec.lWidth; wX++)
|
||
{
|
||
BYTE bIndex;
|
||
FSerror = IMG_FREAD(IMG_FILE, &bIndex, 1, &nbr);
|
||
IMG_vSetColor(BmpDec.aPalette[bIndex][0], BmpDec.aPalette[bIndex][1], BmpDec.aPalette[bIndex][2]);
|
||
IMG_vPutPixel(wX, BmpDec.lHeight - wY - 1);
|
||
}
|
||
for(wX = 0; wX < bPadding; wX++)
|
||
{
|
||
BYTE bValue;
|
||
FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
|
||
}
|
||
}
|
||
}
|
||
FreeMemory((void *)linebuff);
|
||
return 0;
|
||
}
|
||
/*******************************************************************************
|
||
Function: BYTE BMP_bDecode(IMG_FILE *pFile)
|
||
|
||
Precondition: None
|
||
|
||
Overview: This function decodes and puts a section of an image into a memory array
|
||
|
||
Input: Image file
|
||
|
||
Output: Error code - '0' means no error
|
||
*******************************************************************************/
|
||
BYTE BMP_bDecode_memory(int x, int y, int xlen, int ylen, int fnbr, char *p)
|
||
{
|
||
BMPDECODER BmpDec;
|
||
WORD wX, wY;
|
||
BYTE bPadding;
|
||
unsigned int nbr;
|
||
BDEC_vResetData(&BmpDec);
|
||
BDEC_bReadHeader(&BmpDec, fnbr);
|
||
if(BmpDec.blBmMarkerFlag == 0 || BmpDec.bHeaderType < 40 || (BmpDec.blCompressionType != 0 && BmpDec.blCompressionType != 3))
|
||
{
|
||
return 100;
|
||
}
|
||
IMG_wImageWidth = (WORD)BmpDec.lWidth;
|
||
IMG_wImageHeight = (WORD)BmpDec.lHeight;
|
||
IMG_vSetboundaries();
|
||
char *linebuff=GetMemory(IMG_wImageWidth*3); //get a line buffer
|
||
|
||
// IMG_FSEEK(pFile, BmpDec.lImageOffset, 0);
|
||
if(BmpDec.bBitsPerPixel == 24) /* True color Image */
|
||
{
|
||
int pp;
|
||
bPadding = (4 - ((BmpDec.lWidth*3) % 4))%4;
|
||
for(wY = 0; wY < BmpDec.lHeight; wY++)
|
||
{
|
||
routinechecks();
|
||
IMG_vLoopCallback();
|
||
IMG_vCheckAndAbort();
|
||
FSerror = IMG_FREAD(IMG_FILE, linebuff, BmpDec.lWidth*3, &nbr); /* B */
|
||
/* if((void *)DrawBuffer != (void *)DisplayNotSet) {
|
||
PInt(linebuff[0]);PIntComma(linebuff[1]);PIntComma(linebuff[2]);PRet();
|
||
DrawBuffer(x, BmpDec.lHeight - wY - 1 + y, x+BmpDec.lWidth-1, BmpDec.lHeight - wY - 1 + y, linebuff);
|
||
} else */{ //must be a loadable driver so no helper function available
|
||
pp=0;
|
||
for(wX = 0; wX < BmpDec.lWidth; wX++)
|
||
{
|
||
colour.rgbbytes[0]=linebuff[pp++];
|
||
colour.rgbbytes[1]=linebuff[pp++];
|
||
colour.rgbbytes[2]=linebuff[pp++];
|
||
int px=wX-x;
|
||
int py=BmpDec.lHeight - wY - 1 - y;
|
||
if(px<xlen && px>=0 && py<ylen && py>=0){
|
||
char *q= p+(py*xlen+px)*3;
|
||
*q++=colour.rgbbytes[0];
|
||
*q++=colour.rgbbytes[1];
|
||
*q++=colour.rgbbytes[2];
|
||
}
|
||
}
|
||
}
|
||
for(wX = 0; wX < bPadding; wX++)
|
||
{
|
||
BYTE bValue;
|
||
FSerror = IMG_FREAD(IMG_FILE, &bValue, 1, &nbr);
|
||
}
|
||
}
|
||
}
|
||
else error("Only 24-bit colour images supported");
|
||
FreeMemory((void *)linebuff);
|
||
return 0;
|
||
}
|
||
/* @endcond */
|
||
|