www.pudn.com > CXIMAGE_SRC.ZIP > ximatif.cpp
/*
* File: ximatif.cpp
* Purpose: Platform Independent TIFF Image Class Loader and Writer
* 07/Aug/2001
* CxImage version 5.00 23/Aug/2002
*/
#include "ximatif.h"
#if CXIMAGE_SUPPORT_TIF
#include "../tiff/tiffio.h"
#define CVT(x) (((x) * 255L) / ((1L<<16)-1))
#define SCALE(x) (((x)*((1L<<16)-1))/255)
#define CalculateLine(width,bitdepth) (((width * bitdepth) + 7) / 8)
#define CalculatePitch(line) (line + 3 & ~3)
extern "C" TIFF* TIFFOpenEx(CxFile* stream, const char* mode);
////////////////////////////////////////////////////////////////////////////////
bool CxImageTIF::Decode(CxFile * hFile)
{
//Comment this line if you need more information on errors
// TIFFSetErrorHandler(NULL); //
//Open file and fill the TIFF structure
// m_tif = TIFFOpen(imageFileName,"rb");
TIFF* m_tif = TIFFOpenEx(hFile, "rb");
uint32 height=0;
uint32 width=0;
uint16 bitspersample=1;
uint16 samplesperpixel=1;
uint32 rowsperstrip=(DWORD)-1;
uint16 photometric=0;
uint16 compression=1;
uint16 orientation=ORIENTATION_TOPLEFT; //
uint32 x, y;
float resolution, offset;
BOOL isRGB;
BYTE *bits; //pointer to source data
BYTE *bits2; //pointer to destination data
try{
//check if it's a tiff file
if (!m_tif)
throw "Error encountered while opening TIFF file";
info.nNumFrames=0;
while(TIFFSetDirectory(m_tif,(uint16)info.nNumFrames)) info.nNumFrames++;
if (!TIFFSetDirectory(m_tif, (uint16)info.nFrame))
throw "Error: page not present in TIFF file";
//get image info
TIFFGetField(m_tif, TIFFTAG_COMPRESSION, &compression);
// if (compression == COMPRESSION_LZW)
// throw "LZW compression is no longer supported due to Unisys patent enforcement";
TIFFGetField(m_tif, TIFFTAG_IMAGEWIDTH, &width);
TIFFGetField(m_tif, TIFFTAG_IMAGELENGTH, &height);
TIFFGetField(m_tif, TIFFTAG_SAMPLESPERPIXEL, &samplesperpixel);
TIFFGetField(m_tif, TIFFTAG_BITSPERSAMPLE, &bitspersample);
TIFFGetField(m_tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip);
TIFFGetField(m_tif, TIFFTAG_PHOTOMETRIC, &photometric);
TIFFGetField(m_tif, TIFFTAG_ORIENTATION, &orientation);
TIFFGetField(m_tif, TIFFTAG_XRESOLUTION, &resolution);
SetXDPI((long)resolution);
TIFFGetField(m_tif, TIFFTAG_YRESOLUTION, &resolution);
SetYDPI((long)resolution);
TIFFGetField(m_tif, TIFFTAG_XPOSITION, &offset);
info.xOffset = (long)offset;
TIFFGetField(m_tif, TIFFTAG_YPOSITION, &offset);
info.yOffset = (long)offset;
head.biWidth = width;
head.biHeight = height;
head.biClrUsed=0;
info.nBkgndIndex =-1;
if (rowsperstrip>height){
rowsperstrip=height;
TIFFSetField(m_tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip);
}
isRGB = (bitspersample >= 8) &&
(photometric == PHOTOMETRIC_RGB) ||
(photometric == PHOTOMETRIC_YCBCR) ||
(photometric == PHOTOMETRIC_SEPARATED) ||
(photometric == PHOTOMETRIC_LOGL) ||
(photometric == PHOTOMETRIC_LOGLUV);
if (isRGB){
head.biBitCount=24;
}else{
if ((photometric==PHOTOMETRIC_MINISBLACK)||(photometric==PHOTOMETRIC_MINISWHITE)){
if (bitspersample == 1){
head.biBitCount=1; //B&W image
head.biClrUsed =2;
} else if (bitspersample == 4) {
head.biBitCount=4; //16 colors gray scale
head.biClrUsed =16;
} else {
head.biBitCount=8; //gray scale
head.biClrUsed =256;
}
} else if (bitspersample == 4) {
head.biBitCount=4; // 16 colors
head.biClrUsed=16;
} else {
head.biBitCount=8; //256 colors
head.biClrUsed=256;
}
}
if (info.nEscape) throw "Cancelled"; // - cancel decoding
Create(head.biWidth,head.biHeight,head.biBitCount,CXIMAGE_FORMAT_TIF); //image creation
#if CXIMAGE_SUPPORT_ALPHA
if (samplesperpixel==4) AlphaCreate(); //add alpha support for 32bpp tiffs
if (samplesperpixel==2 && bitspersample==8) AlphaCreate(); //add alpha support for 8bpp + alpha
#endif //CXIMAGE_SUPPORT_ALPHA
if (isRGB) {
// Read the whole image into one big RGBA buffer using
// the traditional TIFFReadRGBAImage() API that we trust.
uint32* raster; // retrieve RGBA image
uint32 *row;
raster = (uint32*)_TIFFmalloc(width * height * sizeof (uint32));
if (raster == NULL) throw "No space for raster buffer";
// Read the image in one chunk into an RGBA array
if(!TIFFReadRGBAImage(m_tif, width, height, raster, 1)) {
_TIFFfree(raster);
throw "Corrupted TIFF file!";
}
// read the raster lines and save them in the DIB
// with RGB mode, we have to change the order of the 3 samples RGB
row = &raster[0];
bits2 = info.pImage;
for (y = 0; y < height; y++) {
if (info.nEscape){ // - cancel decoding
_TIFFfree(raster);
throw "Cancelled";
}
bits = bits2;
for (x = 0; x < width; x++) {
*bits++ = (BYTE)TIFFGetB(row[x]);
*bits++ = (BYTE)TIFFGetG(row[x]);
*bits++ = (BYTE)TIFFGetR(row[x]);
#if CXIMAGE_SUPPORT_ALPHA
if (samplesperpixel==4) AlphaSet(x,y,(BYTE)TIFFGetA(row[x]));
#endif //CXIMAGE_SUPPORT_ALPHA
}
row += width;
bits2 += info.dwEffWidth;
}
_TIFFfree(raster);
} else {
RGBQUAD *pal;
pal=(RGBQUAD*)calloc(256,sizeof(RGBQUAD));
if (pal==NULL) throw "Unable to allocate TIFF palette";
// set up the colormap based on photometric
switch(photometric) {
case PHOTOMETRIC_MINISBLACK: // bitmap and greyscale image types
case PHOTOMETRIC_MINISWHITE:
if (bitspersample == 1) { // Monochrome image
if (photometric == PHOTOMETRIC_MINISBLACK) {
pal[1].rgbRed = pal[1].rgbGreen = pal[1].rgbBlue = 255;
} else {
pal[0].rgbRed = pal[0].rgbGreen = pal[0].rgbBlue = 255;
}
} else { // need to build the scale for greyscale images
if (photometric == PHOTOMETRIC_MINISBLACK) {
for (UINT i=0; i 0) {
if (red[n] >= 256 || green[n] >= 256 || blue[n] >= 256) {
Palette16Bits=TRUE;
break;
}
}
// load the palette in the DIB
for (int i = (1 << bitspersample) - 1; i >= 0; i--) {
if (Palette16Bits) {
pal[i].rgbRed =(BYTE) CVT(red[i]);
pal[i].rgbGreen = (BYTE) CVT(green[i]);
pal[i].rgbBlue = (BYTE) CVT(blue[i]);
} else {
pal[i].rgbRed = (BYTE) red[i];
pal[i].rgbGreen = (BYTE) green[i];
pal[i].rgbBlue = (BYTE) blue[i];
}
}
break;
}
SetPalette(pal,head.biClrUsed); //palette assign
free(pal);
// read the tiff lines and save them in the DIB
uint32 nrow;
uint32 ys;
int line = CalculateLine(width, bitspersample * samplesperpixel);
long bitsize= TIFFStripSize(m_tif);
//verify bitsize: could be wrong if StripByteCounts is missing.
if (bitsize>(long)(head.biSizeImage)) bitsize=head.biSizeImage;
bits = (BYTE*)malloc(bitsize);
for (ys = 0; ys < height; ys += rowsperstrip) {
if (info.nEscape){ // - cancel decoding
free(bits);
throw "Cancelled";
}
nrow = (ys + rowsperstrip > height ? height - ys : rowsperstrip);
if (TIFFReadEncodedStrip(m_tif, TIFFComputeStrip(m_tif, ys, 0), bits, nrow * line) == -1) {
free(bits);
throw "Corrupted TIFF file!";
}
for (y = 0; y < nrow; y++) {
long offset=(nrow-y-1)*line;
if (bitspersample==16) for (DWORD xi=0;xi=(int)width){
yi--;
xi=0;
}
}
}
}
/*if (head.biClrUsed==2){
for (y = 0; y < nrow; y++) { for (x = 0; x < width; x++) {
SetPixelIndex(x,y+ys,(bits[y*line+(x>>3)]>>(7-x%8))&0x01);
}}}*/
}
free(bits);
switch(orientation){
case ORIENTATION_TOPRIGHT: /* row 0 top, col 0 rhs */
Mirror();
break;
case ORIENTATION_BOTRIGHT: /* row 0 bottom, col 0 rhs */
Flip();
Mirror();
break;
case ORIENTATION_BOTLEFT: /* row 0 bottom, col 0 lhs */
Flip();
break;
case ORIENTATION_LEFTTOP: /* row 0 lhs, col 0 top */
RotateRight();
Mirror();
break;
case ORIENTATION_RIGHTTOP: /* row 0 rhs, col 0 top */
RotateLeft();
break;
case ORIENTATION_RIGHTBOT: /* row 0 rhs, col 0 bottom */
RotateLeft();
Mirror();
break;
case ORIENTATION_LEFTBOT: /* row 0 lhs, col 0 bottom */
RotateRight();
break;
}
}
} catch (char *message) {
strncpy(info.szLastError,message,255);
if (m_tif) TIFFClose(m_tif);
return FALSE;
}
TIFFClose(m_tif);
return TRUE;
}
////////////////////////////////////////////////////////////////////////////////
bool CxImageTIF::Encode(CxFile * hFile, bool bAppend)
{
try{
if (hFile==NULL) throw "invalid file pointer";
if (m_tif2==NULL) m_tif2=TIFFOpenEx(hFile, "w+b");
if (m_tif2==NULL) throw "initialization fail";
if (bAppend || m_pages) m_multipage=true;
m_pages++;
if (!EncodeBody(m_tif2,m_multipage,m_pages,m_pages)) throw "Error saving TIFF file";
if (bAppend) {
if (!TIFFWriteDirectory(m_tif2)) throw "Error saving TIFF directory";
}
} catch (char *message) {
strncpy(info.szLastError,message,255);
if (m_tif2){
TIFFClose(m_tif2);
m_tif2=NULL;
m_multipage=false;
m_pages=0;
}
return false;
}
if (!bAppend){
TIFFClose(m_tif2);
m_tif2=NULL;
m_multipage=false;
m_pages=0;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
// Thanks to Abe
bool CxImageTIF::Encode(CxFile * hFile, CxImage ** pImages, int pagecount)
{
TIFF *m_tif=NULL;
try{
if (hFile==NULL) throw "invalid file pointer";
if (pImages==NULL || pagecount==0) throw "multipage TIFF, no images!";
m_tif=TIFFOpenEx(hFile, "w+b");
if (m_tif==NULL) throw "initialization fail";
CxImageTIF ghost;
for (int i=1; i<=pagecount; i++){
if (pImages[i-1]==NULL) throw "Bad image pointer";
ghost.Ghost(pImages[i-1]);
if (!ghost.EncodeBody(m_tif,true,i,pagecount)) throw "Error saving TIFF file";
//if (!((CxImageTIF*)pImages[i-1])->EncodeBody(m_tif,true,i,pagecount)) throw "Error saving TIFF file";
if (!TIFFWriteDirectory(m_tif)) throw "Error saving TIFF directory";
}
} catch (char *message) {
strncpy(info.szLastError,message,255);
if (m_tif) TIFFClose(m_tif);
return false;
}
TIFFClose(m_tif);
return true;
}
////////////////////////////////////////////////////////////////////////////////
bool CxImageTIF::EncodeBody(TIFF *m_tif, bool multipage, int page, int pagecount)
{
uint32 height=head.biHeight;
uint32 width=head.biWidth;
uint16 bitcount=head.biBitCount;
uint16 bitspersample;
uint16 samplesperpixel;
uint16 photometric=0;
uint16 compression;
// uint16 pitch;
// int line;
uint32 x, y;
samplesperpixel = ((bitcount == 24) || (bitcount == 32)) ? (BYTE)3 : (BYTE)1;
#if CXIMAGE_SUPPORT_ALPHA
if (bitcount==24 && HasAlpha()) { bitcount=32; samplesperpixel=4; }
#endif //CXIMAGE_SUPPORT_ALPHA
bitspersample = bitcount / samplesperpixel;
//set the PHOTOMETRIC tag
RGBQUAD *rgb = GetPalette();
switch (bitcount) {
case 1:
if (CompareColors(&rgb[0],&rgb[1])<0) {
/* some viewers do not handle PHOTOMETRIC_MINISBLACK:
* let's transform the image in PHOTOMETRIC_MINISWHITE
*/
//invert the colors
RGBQUAD tempRGB=GetPaletteColor(0);
SetPaletteIndex(0,GetPaletteColor(1));
SetPaletteIndex(1,tempRGB);
//invert the pixels
BYTE *iSrc=info.pImage;
for (unsigned long i=0;irgbRed != x)||(rgb->rgbRed != rgb->rgbGreen)||(rgb->rgbRed != rgb->rgbBlue)){
photometric = PHOTOMETRIC_PALETTE;
break;
}
rgb++;
}
break;
case 24:
case 32:
photometric = PHOTOMETRIC_RGB;
break;
}
#if CXIMAGE_SUPPORT_ALPHA
if (HasAlpha() && bitcount==8) samplesperpixel=2; //8bpp + alpha layer
#endif //CXIMAGE_SUPPORT_ALPHA
// line = CalculateLine(width, bitspersample * samplesperpixel);
// pitch = (uint16)CalculatePitch(line);
//prepare the palette struct
RGBQUAD pal[256];
if (GetPalette()){
BYTE b;
memcpy(pal,GetPalette(),GetPaletteSize());
for(WORD a=0;a gives better compression
// handle metrics
TIFFSetField(m_tif, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);
TIFFSetField(m_tif, TIFFTAG_XRESOLUTION, (float)info.xDPI);
TIFFSetField(m_tif, TIFFTAG_YRESOLUTION, (float)info.yDPI);
// TIFFSetField(m_tif, TIFFTAG_XPOSITION, (float)info.xOffset);
// TIFFSetField(m_tif, TIFFTAG_YPOSITION, (float)info.yOffset);
// multi-paging - Thanks to Abe
if (multipage)
{
char page_number[20];
sprintf(page_number, "Page %d", page);
TIFFSetField(m_tif, TIFFTAG_SUBFILETYPE, FILETYPE_PAGE);
TIFFSetField(m_tif, TIFFTAG_PAGENUMBER, page,pagecount);
TIFFSetField(m_tif, TIFFTAG_PAGENAME, page_number);
} else {
TIFFSetField(m_tif, TIFFTAG_SUBFILETYPE, 0);
}
// palettes (image colormaps are automatically scaled to 16-bits)
if (photometric == PHOTOMETRIC_PALETTE) {
uint16 *r, *g, *b;
r = (uint16 *) _TIFFmalloc(sizeof(uint16) * 3 * 256);
g = r + 256;
b = g + 256;
for (int i = 255; i >= 0; i--) {
b[i] = (uint16)SCALE((uint16)pal[i].rgbRed);
g[i] = (uint16)SCALE((uint16)pal[i].rgbGreen);
r[i] = (uint16)SCALE((uint16)pal[i].rgbBlue);
}
TIFFSetField(m_tif, TIFFTAG_COLORMAP, r, g, b);
_TIFFfree(r);
}
// compression
switch(bitcount) {
case 1 :
compression = COMPRESSION_CCITTFAX4; //COMPRESSION_CCITTFAX3;
break;
case 8 :
compression = COMPRESSION_PACKBITS;
break;
case 24 :
case 32 :
compression = COMPRESSION_JPEG; //COMPRESSION_PACKBITS;
break;
default :
compression = COMPRESSION_NONE;
break;
}
TIFFSetField(m_tif, TIFFTAG_COMPRESSION, compression);
// read the DIB lines from bottom to top
// and save them in the TIF
// -------------------------------------
BYTE *bits;
switch(bitcount) {
case 1 :
case 4 :
case 8 :
{
if (samplesperpixel==1){
for (y = 0; y < height; y++) {
bits= info.pImage + (height - y - 1)*info.dwEffWidth;
TIFFWriteScanline(m_tif,bits, y, 0);
}
}
#if CXIMAGE_SUPPORT_ALPHA
else { //8bpp + alpha layer
bits = (BYTE*)malloc(2*width);
for (y = 0; y < height; y++) {
for (x=0;x