diff options
Diffstat (limited to 'lib/epson-escpage-comp.c')
| -rw-r--r-- | lib/epson-escpage-comp.c | 581 |
1 files changed, 581 insertions, 0 deletions
diff --git a/lib/epson-escpage-comp.c b/lib/epson-escpage-comp.c new file mode 100644 index 0000000..cb458ee --- /dev/null +++ b/lib/epson-escpage-comp.c @@ -0,0 +1,581 @@ +/*_______________________________ epson-escpage-comp.c _____________________________*/
+
+/* 1 2 3 4 5 6 7 8 */
+/*34567890123456789012345678901234567890123456789012345678901234567890123456789012345678*/
+/*******************************************|********************************************/
+/*
+ * Copyright (c) 2010 Seiko Epson Corporation All rights reserved.
+ *
+ * Copyright protection claimed includes all forms and matters of
+ * copyrightable material and information now allowed by statutory or judicial
+ * law or hereinafter granted, including without limitation, material generated
+ * from the software programs which are displayed on the screen such as icons,
+ * screen display looks, etc.
+ *
+ */
+
+/*------------------------------------ Includes -------------------------------------*/
+/*******************************************|********************************************/
+#include "epson-escpr-mem.h"
+#include "epson-escpage-comp.h"
+
+/*----------------------------------- Definitions ------------------------------------*/
+/*******************************************|********************************************/
+
+#ifdef EPS_LOG_MODULE_PAGE
+#define EPS_LOG_MODULE EPS_LOG_MODULE_PAGE
+#else
+#define EPS_LOG_MODULE 0
+#endif
+
+/* Define Bitmap Format */
+#define EP_BGR 0
+#define EP_RGB 1
+
+#define ConvertEndianWord(w) ((EPS_UINT16) ((((w) >> 8) & 0xFF) | (((w) << 8) & 0xFF00)))
+#define ConvertEndianDWORD(d) (((EPS_UINT32) (d) << 24) | (((EPS_UINT32) (d) << 8) & 0x00FF0000) | (((EPS_UINT32) (d) >> 8) & 0x0000FF00) | ((EPS_UINT32) (d) >> 24))
+#define GetCompressMode(d) ((EPS_UINT16) ((d) >> 16))
+#define GetCompressQuality(d) ((EPS_UINT16) ((d) & 0xFFFF))
+
+#define BAND_PIXEL 4
+#define MakeCompress20Mode(q) (0x20 + (q))
+#define MakeUncompress20Mode(q) (0x00 + (q))
+
+/*--------------------------- Data Structure Declarations ---------------------------*/
+/*******************************************|********************************************/
+typedef struct tagCODINGDATA {
+ EPS_UINT16 hufCode[256] ;
+ EPS_UINT8 hufCodeLen[256] ;
+ EPS_UINT8* lpCurPtr ;
+ EPS_UINT32 leftCount ;
+ EPS_UINT32 code ;
+ EPS_UINT16 codeBits ;
+} CODINGDATA ;
+
+typedef struct tagCOMPRESSBUFFER {
+ EPS_UINT16 wMode ; /* Compress Mode */
+ EPS_UINT16 wQuality ; /* Compress Quality */
+ EPS_UINT8* lpBuffer ; /* Output Buffer */
+ EPS_UINT32 sizeBuffer ; /* Output Buffer Size */
+ EPS_UINT32 dwWidth ;
+ EPS_UINT32 dwHeight ;
+ EPS_UINT32 format ; /* Align Format */
+ EPS_UINT16 biBitCount ; /* Bitmap Bit Count */
+ EPS_INT32 nextLine ;
+ EPS_BOOL bInvertX ; /* Invert Image X */
+ EPS_UINT8* lpBitsOrg ; /* Start Address */
+ EPS_UINT32 ySrc ;
+} COMPRESSBUFFER ;
+
+typedef struct tagBLOCKHEADER20 {
+ EPS_UINT32 size ; /* 0 */
+ EPS_UINT16 width ; /* 4 */
+ EPS_UINT16 bandPixel ; /* 6 */
+ EPS_UINT16 mode ; /* 8 */
+} BLOCKHEADER20 ;
+#define SIZEOF_BLOCKHEADER20 (4+2+2+2)
+
+typedef struct tagCOMPBUFFER20 {
+ COMPRESSBUFFER cbuf ;
+ BLOCKHEADER20 bh ;
+ CODINGDATA cd ;
+ EPS_UINT32 bandLimit ;
+ EPS_UINT8 mode[4] ;
+} COMPBUFFER20 ;
+
+/*---------------------------- ESC/P-R Lib Global Variables --------------------------*/
+/*******************************************|********************************************/
+extern EPS_CMN_FUNC epsCmnFnc;
+
+/*------------------------------ Local Global Variables ------------------------------*/
+/*******************************************|********************************************/
+static const EPS_UINT16 HufmanDefTable2[]
+ = {0, 0, 1, 2, 2, 4, 4, 7, 9, 14, 17, 24, 172} ;
+static const EPS_UINT16 HufmanDefTable3[][2]
+ = { 0x00, 2, 0x02, 2, 0x01, 2, 0x03, 4, 0x0b, 4,
+ 0x07, 5, 0x17, 5, 0x0f, 5, 0x1f, 5,
+ } ;
+
+/*-------------------------- Private Functions Declaration --------------------------*/
+/*******************************************|********************************************/
+static EPS_UINT32 EPGetCompressBufferSize(EPS_UINT32 dwMode) ;
+static EPS_UINT32 EPCompressImage(
+ EPS_UINT32 dwMode,
+ EPS_UINT32 xSrc, EPS_UINT32 ySrc, EPS_UINT32 dwWidth, EPS_UINT32 dwHeight,
+ EPS_BITMAPINFO *lpbmi, EPS_UINT32 biFormat, EPS_UINT8* lpBits,
+ EPS_UINT8* lpBuf, EPS_UINT32 sizeBuf,
+ EPS_UINT8* lpWorkBuf ) ;
+static EPS_UINT32 Compress20(COMPBUFFER20* lpC20Buf) ;
+static EPS_BOOL MakeHufmanCodeTable(EPS_UINT16 wMode, EPS_UINT16 wQuality, CODINGDATA* lpcd) ;
+static EPS_BOOL WriteBandData20(EPS_INT32 band, EPS_INT32 incptr, EPS_UINT8* lpSrc, COMPBUFFER20* lpC20Buf) ;
+static EPS_UINT8 GetByteBLOCKHEADER20(BLOCKHEADER20 *p, EPS_INT32 n);
+static void MakeHufmanTable1(const EPS_UINT16 cdn[], CODINGDATA* lpcd) ;
+static void CodeHufmanData(const EPS_UINT8 d, CODINGDATA* const lpcd);
+static void WriteDataToBuffer(CODINGDATA* const lpcd);
+
+
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+/*%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%*/
+/*-------------------- Public Functions ---------------------*/
+/*%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%*/
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+
+EPS_UINT8* CompressBitImage(
+
+ EPS_RECT *pRec,
+ EPS_BITMAPINFO *pBitMapInfo,
+ EPS_UINT8* pRealBits,
+ EPS_UINT32 ulDataFormat,
+ EPS_UINT32 *pulCompressType,
+ EPS_UINT32 *pulImageSize
+
+){
+ EPS_BITMAPINFO bmi;
+ EPS_UINT32 dwComMode = 0;
+ EPS_UINT32 dwwkBufferSize;
+ EPS_UINT8* pwkBuffer = NULL;
+ EPS_UINT32 dwBuffer;
+ EPS_UINT8* pTmp = NULL;
+ EPS_UINT32 dwCompressedSize;
+
+ EPS_INT32 ulSrcleft, ulSrcright, ulSrcbottom, ulSrctop;
+
+ ulSrcleft = pRec->left;
+ ulSrcright= pRec->right;
+ ulSrcbottom = pRec->bottom;
+ ulSrctop= pRec->top;
+
+ bmi = *pBitMapInfo;
+
+ dwComMode = ulDataFormat;
+
+ *pulCompressType = dwComMode;
+ dwComMode = dwComMode << 16;
+
+ dwwkBufferSize = EPGetCompressBufferSize( dwComMode);
+
+ if(dwwkBufferSize == 0){
+ *pulCompressType = 0;
+ return NULL;
+ }
+
+ if(!(pwkBuffer = (EPS_UINT8*)EPS_ALLOC( dwwkBufferSize ))){
+ *pulCompressType = 0;
+ return NULL;
+ }
+
+ dwBuffer = (((ulSrcright - ulSrcleft ) * 24 + 31) / 32) * 4 * (ulSrcbottom - ulSrctop );
+ if(!(pTmp = (EPS_UINT8*)EPS_ALLOC( dwBuffer ))){
+ EPS_FREE(pwkBuffer );
+ *pulCompressType = 0;
+ return NULL;
+ }
+
+ dwCompressedSize = EPCompressImage( dwComMode,
+ ulSrcleft,
+ ulSrctop,
+ ulSrcright - ulSrcleft ,
+ ulSrcbottom - ulSrctop ,
+ &bmi,
+ EP_RGB,
+ pRealBits,
+ pTmp,
+ dwBuffer,
+ pwkBuffer );
+
+ EPS_FREE(pwkBuffer);
+ if(dwCompressedSize == 0){
+ EPS_FREE(pTmp);
+ *pulCompressType = 0;
+ return NULL;
+ }
+
+ *pulImageSize = dwCompressedSize;
+
+ return pTmp;
+}
+
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+/*%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%*/
+/*-------------------- Local Functions ---------------------*/
+/*%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%*/
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+
+static EPS_UINT32 EPGetCompressBufferSize (EPS_UINT32 dwMode)
+{
+ EPS_UINT16 mode;
+
+ EPS_LOG_FUNCIN
+
+ mode = GetCompressMode(dwMode) ;
+
+ switch (mode) {
+
+ case EP_COMPRESS20 :
+ EPS_RETURN( sizeof(COMPBUFFER20) )
+ default:
+ break;
+ }
+
+ EPS_RETURN( 0 )
+}
+
+
+static EPS_UINT32 EPCompressImage (
+ EPS_UINT32 dwMode,
+ EPS_UINT32 xSrc,
+ EPS_UINT32 ySrc,
+ EPS_UINT32 dwWidth,
+ EPS_UINT32 dwHeight,
+ EPS_BITMAPINFO *lpbmi,
+ EPS_UINT32 biFormat,
+ EPS_UINT8* lpBits,
+ EPS_UINT8* lpBuf,
+ EPS_UINT32 sizeBuf,
+ EPS_UINT8* lpWorkBuf )
+{
+ COMPRESSBUFFER* lpCBuf ;
+ EPS_UINT32 height ;
+
+ EPS_LOG_FUNCIN
+
+ if (dwWidth == 0 || dwHeight == 0) {
+ EPS_RETURN( 0 )
+ }
+ if (lpWorkBuf == NULL) {
+ EPS_RETURN( 0 )
+ }
+
+ lpCBuf = (COMPRESSBUFFER*) lpWorkBuf ;
+
+ /* Check Width and calculate Scan Size */
+
+ if (lpbmi->biWidth <= 0 || (EPS_UINT32) lpbmi->biWidth < xSrc + dwWidth) {
+ EPS_RETURN( 0 )
+ }
+
+ lpCBuf->dwWidth = dwWidth ;
+ lpCBuf->biBitCount = lpbmi->biBitCount ;
+ lpCBuf->format = biFormat ;
+
+ lpCBuf->nextLine = ((lpbmi->biWidth * lpCBuf->biBitCount + 7) / 8 + 3) & 0xFFFFFFFC ;
+ lpCBuf->lpBitsOrg = lpBits + (xSrc*lpCBuf->biBitCount / 8) ;
+ /*lpCBuf->bitOffset = (EPS_INT16) (xSrc*lpCBuf->biBitCount % 8) ;*/
+
+ /* Check Height and calculate start addr */
+
+ lpCBuf->dwHeight = dwHeight ;
+ if (lpbmi->biHeight > 0) {
+ /* bottom up bitmap */
+ height = (EPS_UINT32) lpbmi->biHeight ;
+ lpCBuf->lpBitsOrg += lpCBuf->nextLine * (ySrc + dwHeight - 1);
+ lpCBuf->nextLine = -lpCBuf->nextLine ;
+ }
+ else {
+ /* top down bitmap */
+ height = (EPS_UINT32) -lpbmi->biHeight;
+ lpCBuf->lpBitsOrg += lpCBuf->nextLine * ySrc;
+ }
+ if (height == 0 || height < ySrc + dwHeight) {
+ EPS_RETURN( 0 )
+ }
+
+ /* Fill Other fields */
+ lpCBuf->wMode = GetCompressMode(dwMode) ;
+ lpCBuf->wQuality = GetCompressQuality(dwMode) ;
+ lpCBuf->lpBuffer = lpBuf ;
+ lpCBuf->sizeBuffer = sizeBuf ;
+ lpCBuf->bInvertX = FALSE ;
+
+ switch (lpCBuf->wMode) {
+ case EP_COMPRESS20 :
+ EPS_RETURN( Compress20((COMPBUFFER20*) lpCBuf) )
+ default:
+ break;
+ }
+
+ EPS_RETURN( 0 )
+}
+
+/* 24BPP Image Compress Mode 20 */
+static EPS_UINT32 Compress20(COMPBUFFER20* lpC20Buf)
+{
+ EPS_UINT8* lpSrc ;
+ EPS_INT32 nextBand ;
+ EPS_UINT32 y, yblock, ymod ;
+ EPS_INT32 incptr ;
+
+ EPS_LOG_FUNCIN
+
+ if (lpC20Buf->cbuf.biBitCount == 24) {
+ incptr = 3 ;
+ }
+ else if (lpC20Buf->cbuf.biBitCount == 32) {
+ incptr = 4 ;
+ }
+ else {
+ EPS_RETURN( 0 )
+ }
+
+ if (lpC20Buf->cbuf.bInvertX) {
+ /* invert image */
+ lpSrc = lpC20Buf->cbuf.lpBitsOrg + (lpC20Buf->cbuf.dwWidth - 1) * incptr ;
+ incptr = -incptr ;
+ }
+ else {
+ lpSrc = lpC20Buf->cbuf.lpBitsOrg ;
+ }
+
+ if (lpC20Buf->cbuf.format == EP_RGB) {
+ lpC20Buf->mode[0] = 2 ;
+ lpC20Buf->mode[1] = 1 ;
+ lpC20Buf->mode[2] = 0 ;
+ }
+ else {
+ lpC20Buf->mode[0] = 0 ;
+ lpC20Buf->mode[1] = 1 ;
+ lpC20Buf->mode[2] = 2 ;
+ }
+
+ /* Make Hufman Code Table */
+ MakeHufmanCodeTable(lpC20Buf->cbuf.wMode, lpC20Buf->cbuf.wQuality, &lpC20Buf->cd) ;
+
+ /* Make Block Header */
+ lpC20Buf->bh.width = ConvertEndianWord(lpC20Buf->cbuf.dwWidth) ;
+ lpC20Buf->bh.bandPixel = ConvertEndianWord(BAND_PIXEL) ;
+
+ /* Initialize */
+ lpC20Buf->cd.lpCurPtr = lpC20Buf->cbuf.lpBuffer ;
+ lpC20Buf->cd.leftCount = lpC20Buf->cbuf.sizeBuffer ;
+
+ yblock = lpC20Buf->cbuf.dwHeight / BAND_PIXEL ;
+ ymod = lpC20Buf->cbuf.dwHeight % BAND_PIXEL ;
+
+ nextBand = lpC20Buf->cbuf.nextLine * BAND_PIXEL ;
+
+ lpC20Buf->bandLimit = SIZEOF_BLOCKHEADER20 + lpC20Buf->cbuf.dwWidth * BAND_PIXEL ;
+
+ for (y = 0 ; y < yblock ; y++) {
+ if (! WriteBandData20(BAND_PIXEL, incptr, lpSrc, lpC20Buf)) {
+ EPS_RETURN( 0 )
+ }
+ lpSrc += nextBand ;
+ }
+ if (ymod) {
+ lpC20Buf->bh.bandPixel = ConvertEndianWord(ymod) ;
+ lpC20Buf->bandLimit = SIZEOF_BLOCKHEADER20 + lpC20Buf->cbuf.dwWidth * ymod ;
+
+ if (! WriteBandData20((EPS_UINT16) ymod, incptr, lpSrc, lpC20Buf)) {
+ EPS_RETURN( 0 )
+ }
+ }
+
+ if (lpC20Buf->cd.leftCount == 0) {
+ EPS_RETURN( 0 )
+ }
+
+ EPS_RETURN( lpC20Buf->cbuf.sizeBuffer - lpC20Buf->cd.leftCount )
+}
+
+
+static EPS_BOOL WriteBandData20(EPS_INT32 band, EPS_INT32 incptr, EPS_UINT8* lpSrc, COMPBUFFER20* lpC20Buf)
+{
+ EPS_UINT32 sizeBlockData ;
+ EPS_UINT8* lpBandStart ;
+ EPS_UINT32 countBandStart ;
+ EPS_UINT8 *lpBand, *lpPt, *lpPrePt;
+ EPS_UINT8 left ;
+
+ EPS_INT32 i, j ;
+ EPS_UINT32 x ;
+
+ EPS_LOG_FUNCIN
+
+ for (i = 0 ; i <= 2 ; i++) {
+ if (lpC20Buf->cd.leftCount <= SIZEOF_BLOCKHEADER20) {
+ EPS_RETURN( FALSE )
+ }
+
+ lpBandStart = lpC20Buf->cd.lpCurPtr ;
+ countBandStart = lpC20Buf->cd.leftCount ;
+
+ lpC20Buf->cd.lpCurPtr += SIZEOF_BLOCKHEADER20;
+ lpC20Buf->cd.leftCount -= SIZEOF_BLOCKHEADER20;
+ lpC20Buf->cd.code = 0 ;
+ lpC20Buf->cd.codeBits = 0 ;
+
+ lpBand = lpSrc + i ;
+ lpPt = lpBand ;
+ left = 0 ;
+
+ for (x = 0 ; x < lpC20Buf->cbuf.dwWidth ; x++) {
+ CodeHufmanData((EPS_UINT8) (*lpPt-left), &lpC20Buf->cd) ;
+ left = *lpPt ;
+ lpPt += incptr ;
+ }
+
+ for (j = 1 ; j < band ; j++) {
+ lpPrePt = lpBand ;
+ lpBand += lpC20Buf->cbuf.nextLine ;
+ lpPt = lpBand ;
+ left = 0 ;
+
+ for (x = 0 ; x < lpC20Buf->cbuf.dwWidth ; x++) {
+ CodeHufmanData((EPS_UINT8) (*lpPt-((left+*lpPrePt)>>1)), &lpC20Buf->cd) ;
+ left = *lpPt ;
+ lpPt += incptr ;
+ lpPrePt += incptr ;
+ }
+ }
+ if (lpC20Buf->cd.codeBits) WriteDataToBuffer(&lpC20Buf->cd) ;
+
+ if (countBandStart <= lpC20Buf->cd.leftCount + lpC20Buf->bandLimit) {
+ /* Write Block Header */
+ sizeBlockData = countBandStart - lpC20Buf->cd.leftCount ;
+ lpC20Buf->bh.size = ConvertEndianDWORD(sizeBlockData) ;
+ lpC20Buf->bh.mode = ConvertEndianWord(MakeCompress20Mode(lpC20Buf->mode[i])) ;
+
+ for (x = 0 ; x < SIZEOF_BLOCKHEADER20 ; x++) {
+ *lpBandStart++ = GetByteBLOCKHEADER20(&lpC20Buf->bh, x);
+ }
+ }
+ else {
+ /* Output Un-Compress Data */
+ if (countBandStart < lpC20Buf->bandLimit) {
+ EPS_RETURN( FALSE )
+ }
+
+ sizeBlockData = lpC20Buf->bandLimit ;
+ lpC20Buf->bh.size = ConvertEndianDWORD(sizeBlockData) ;
+ lpC20Buf->bh.mode = ConvertEndianWord(MakeUncompress20Mode(lpC20Buf->mode[i])) ;
+
+ for (x = 0 ; x < SIZEOF_BLOCKHEADER20; x++) {
+ *lpBandStart++ = GetByteBLOCKHEADER20(&lpC20Buf->bh, x);
+ }
+
+ lpBand = lpSrc + i ;
+ for (j = 0 ; j < band ; j++) {
+ lpPt = lpBand ;
+ lpBand += lpC20Buf->cbuf.nextLine ;
+ for (x = 0 ; x < lpC20Buf->cbuf.dwWidth ; x++) {
+ *lpBandStart++ = *lpPt ;
+ lpPt += incptr ;
+ }
+ }
+
+ lpC20Buf->cd.lpCurPtr = lpBandStart ;
+ lpC20Buf->cd.leftCount = countBandStart - lpC20Buf->bandLimit ;
+ }
+ }
+
+ EPS_RETURN( TRUE )
+}
+
+
+static EPS_UINT8 GetByteBLOCKHEADER20(BLOCKHEADER20 *p, EPS_INT32 n)
+{
+ EPS_UINT8 b = 0;
+ switch(n){
+ case 0: b = (EPS_UINT8)(p->size) & 0x000000FF; break;
+ case 1: b = (EPS_UINT8)(p->size >> 8) & 0x000000FF; break;
+ case 2: b = (EPS_UINT8)(p->size >> 16) & 0x000000FF; break;
+ case 3: b = (EPS_UINT8)(p->size >> 24) & 0x000000FF; break;
+
+ case 4: b = (EPS_UINT8)(p->width) & 0x00FF; break;
+ case 5: b = (EPS_UINT8)(p->width >> 8) & 0x00FF; break;
+
+ case 6: b = (EPS_UINT8)(p->bandPixel) & 0x00FF; break;
+ case 7: b = (EPS_UINT8)(p->bandPixel >> 8) & 0x00FF; break;
+
+ case 8: b = (EPS_UINT8)(p->mode) & 0x00FF; break;
+ case 9: b = (unsigned char)(p->mode >> 8) & 0x00FF; break;
+
+ default: b = 0;
+ }
+ return b;
+}
+
+
+static void WriteDataToBuffer(CODINGDATA* const lpcd)
+{
+ if (lpcd->leftCount) {
+ *lpcd->lpCurPtr++ = (EPS_UINT8) lpcd->code ;
+ lpcd->leftCount-- ;
+ lpcd->code >>= 8 ;
+ }
+ lpcd->codeBits -= 8 ;
+}
+
+
+static void CodeHufmanData(const EPS_UINT8 d, CODINGDATA* const lpcd)
+{
+ lpcd->code |= ((EPS_UINT32) lpcd->hufCode[d]) << (lpcd->codeBits) ;
+ lpcd->codeBits += lpcd->hufCodeLen[d] ;
+
+ while (lpcd->codeBits >= 8) WriteDataToBuffer(lpcd) ;
+}
+
+
+static EPS_BOOL MakeHufmanCodeTable(EPS_UINT16 wMode, EPS_UINT16 wQuality, CODINGDATA* lpcd)
+{
+ switch (wMode) {
+ case EP_COMPRESS20 :
+ MakeHufmanTable1(HufmanDefTable2, lpcd) ;
+ return TRUE ;
+ }
+
+ return FALSE ;
+}
+
+
+static void MakeHufmanTable1(const EPS_UINT16 cdn[], CODINGDATA* lpcd)
+{
+
+ EPS_UINT16 huf, rhuf, temp, i ;
+ EPS_INT32 len, num, j ;
+
+ huf = 0 ;
+ num = 0 ;
+
+ for(len = 1 ; len <= 12; len++) {
+ huf <<= 1;
+
+ for(i = 0; i < cdn[len] ; i++) {
+ rhuf = 0 ;
+ temp = huf ;
+
+ for (j = 0 ; j < len ; j++) {
+ rhuf = (rhuf << 1) | (temp & 1) ;
+ temp >>= 1 ;
+ }
+
+ if (num) {
+ j = (num+1) >> 1 ;
+ if ((num & 0x1) == 0) j = 256 - j ;
+ }
+ else {
+ j = 0 ;
+ }
+
+ lpcd->hufCode[j] = rhuf ;
+ lpcd->hufCodeLen[j] = (EPS_UINT8) len ;
+
+ huf ++ ;
+ num ++ ;
+ }
+ }
+}
+
+
+/*_______________________________ epson-escpage-comp.c _____________________________*/
+
+/*34567890123456789012345678901234567890123456789012345678901234567890123456789012345678*/
+/* 1 2 3 4 5 6 7 8 */
+/*******************************************|********************************************/
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
+/***** End of File *** End of File *** End of File *** End of File *** End of File ******/
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%|%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
|