📄 ximatif.cpp
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/*
* File: ximatif.cpp
* Purpose: Platform Independent TIFF Image Class Loader and Writer
* 07/Aug/2001 Davide Pizzolato - www.xdp.it
* CxImage version 5.99c 17/Oct/2004
*/
#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);
////////////////////////////////////////////////////////////////////////////////
CxImageTIF::~CxImageTIF()
{
if (m_tif2) TIFFClose(m_tif2);
}
////////////////////////////////////////////////////////////////////////////////
bool CxImageTIF::Decode(CxFile * hFile)
{
//Comment this line if you need more information on errors
// TIFFSetErrorHandler(NULL); //<Patrick Hoffmann>
//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; //<vho>
uint16 res_unit; //<Trifon>
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";
// <Robert Abram> - 12/2002 : get NumFrames directly, instead of looping
// info.nNumFrames=0;
// while(TIFFSetDirectory(m_tif,(uint16)info.nNumFrames)) info.nNumFrames++;
info.nNumFrames = TIFFNumberOfDirectories(m_tif);
if (!TIFFSetDirectory(m_tif, (uint16)info.nFrame))
throw "Error: page not present in TIFF file";
//get image info
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);
if (info.nEscape == -1) {
// Return output dimensions only
head.biWidth = width;
head.biHeight = height;
throw "output dimensions returned";
}
TIFFGetFieldDefaulted(m_tif, TIFFTAG_RESOLUTIONUNIT, &res_unit);
if (TIFFGetField(m_tif, TIFFTAG_XRESOLUTION, &resolution))
{
if (res_unit == RESUNIT_CENTIMETER) resolution = (float)(resolution*2.54f + 0.5f);
SetXDPI((long)resolution);
}
if (TIFFGetField(m_tif, TIFFTAG_YRESOLUTION, &resolution))
{
if (res_unit == RESUNIT_CENTIMETER) resolution = (float)(resolution*2.54f + 0.5f);
SetYDPI((long)resolution);
}
if (TIFFGetField(m_tif, TIFFTAG_XPOSITION, &offset)) info.xOffset = (long)offset;
if (TIFFGetField(m_tif, TIFFTAG_YPOSITION, &offset)) info.yOffset = (long)offset;
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"; // <vho> - cancel decoding
Create(width,height,head.biBitCount,CXIMAGE_FORMAT_TIF); //image creation
if (!pDib) throw "CxImageTIF can't create image";
#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
TIFFGetField(m_tif, TIFFTAG_COMPRESSION, &compression);
SetCodecOption(compression); // <DPR> save original compression type
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){ // <vho> - 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 (DWORD i=0; i<head.biClrUsed; i++){
pal[i].rgbRed = pal[i].rgbGreen = pal[i].rgbBlue = (BYTE)(i*(255/(head.biClrUsed-1)));
}
} else {
for (DWORD i=0; i<head.biClrUsed; i++){
pal[i].rgbRed = pal[i].rgbGreen = pal[i].rgbBlue = (BYTE)(255-i*(255/(head.biClrUsed-1)));
}
}
}
break;
case PHOTOMETRIC_PALETTE: // color map indexed
uint16 *red;
uint16 *green;
uint16 *blue;
TIFFGetField(m_tif, TIFFTAG_COLORMAP, &red, &green, &blue);
// Is the palette 16 or 8 bits ?
BOOL Palette16Bits = FALSE;
int n=1<<bitspersample;
while (n-- > 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*samplesperpixel)) bitsize=head.biSizeImage*samplesperpixel;
int tiled_image = TIFFIsTiled(m_tif);
uint32 tw, tl;
BYTE* tilebuf;
if (tiled_image){
TIFFGetField(m_tif, TIFFTAG_TILEWIDTH, &tw);
TIFFGetField(m_tif, TIFFTAG_TILELENGTH, &tl);
rowsperstrip = tl;
bitsize = TIFFTileSize(m_tif) * (int)(1+width/tw);
tilebuf = (BYTE*)malloc(TIFFTileSize(m_tif));
}
bits = (BYTE*)malloc(bitsize);
if (bits==NULL){
throw "CxImageTIF can't allocate memory";
}
for (ys = 0; ys < height; ys += rowsperstrip) {
if (info.nEscape){ // <vho> - cancel decoding
free(bits);
throw "Cancelled";
}
nrow = (ys + rowsperstrip > height ? height - ys : rowsperstrip);
if (tiled_image){
uint32 imagew = TIFFScanlineSize(m_tif);
uint32 tilew = TIFFTileRowSize(m_tif);
int iskew = imagew - tilew;
uint8* bufp = (uint8*) bits;
uint32 colb = 0;
for (uint32 col = 0; col < width; col += tw) {
if (TIFFReadTile(m_tif, tilebuf, col, ys, 0, 0) < 0){
free(tilebuf);
free(bits);
throw "Corrupted tiled TIFF file!";
}
if (colb + tw > imagew) {
uint32 owidth = imagew - colb;
uint32 oskew = tilew - owidth;
TileToStrip(bufp + colb, tilebuf, nrow, owidth, oskew + iskew, oskew );
} else {
TileToStrip(bufp + colb, tilebuf, nrow, tilew, iskew, 0);
}
colb += tilew;
}
} else {
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<width;xi++) bits[xi+offset]=bits[xi*2+offset+1];
if (samplesperpixel==1) { //simple 8bpp image
memcpy(info.pImage+info.dwEffWidth*(height-ys-nrow+y),bits+offset,info.dwEffWidth);
} else if (samplesperpixel==2) { //8bpp image with alpha layer
int xi=0;
int ii=0;
int yi=height-ys-nrow+y;
while (ii<line){
SetPixelIndex(xi,yi,bits[ii+offset]);
#if CXIMAGE_SUPPORT_ALPHA
AlphaSet(xi,yi,bits[ii+offset+1]);
#endif //CXIMAGE_SUPPORT_ALPHA
ii+=2;
xi++;
if (xi>=(int)width){
yi--;
xi=0;
}
}
} else { //photometric==PHOTOMETRIC_CIELAB
if (head.biBitCount!=24){ //fix image
Create(width,height,24,CXIMAGE_FORMAT_TIF);
#if CXIMAGE_SUPPORT_ALPHA
if (samplesperpixel==4) AlphaCreate();
#endif //CXIMAGE_SUPPORT_ALPHA
}
int xi=0;
int ii=0;
int yi=height-ys-nrow+y;
RGBQUAD c;
int l,a,b,bitsoffset;
double p,cx,cy,cz,cr,cg,cb;
while (ii<line){
bitsoffset = ii*samplesperpixel+offset;
l=bits[bitsoffset];
a=bits[bitsoffset+1];
b=bits[bitsoffset+2];
if (a>127) a-=256;
if (b>127) b-=256;
// lab to xyz
p = (l/2.55 + 16) / 116.0;
cx = pow( p + a * 0.002, 3);
cy = pow( p, 3);
cz = pow( p - b * 0.005, 3);
// white point
cx*=0.95047;
//cy*=1.000;
cz*=1.0883;
// xyz to rgb
cr = 3.240479 * cx - 1.537150 * cy - 0.498535 * cz;
cg = -0.969256 * cx + 1.875992 * cy + 0.041556 * cz;
cb = 0.055648 * cx - 0.204043 * cy + 1.057311 * cz;
if ( cr > 0.00304 ) cr = 1.055 * pow(cr,0.41667) - 0.055;
else cr = 12.92 * cr;
if ( cg > 0.00304 ) cg = 1.055 * pow(cg,0.41667) - 0.055;
else cg = 12.92 * cg;
if ( cb > 0.00304 ) cb = 1.055 * pow(cb,0.41667) - 0.055;
else cb = 12.92 * cb;
c.rgbRed =(BYTE)max(0,min(255,(int)(cr*255)));
c.rgbGreen=(BYTE)max(0,min(255,(int)(cg*255)));
c.rgbBlue =(BYTE)max(0,min(255,(int)(cb*255)));
SetPixelColor(xi,yi,c);
#if CXIMAGE_SUPPORT_ALPHA
if (samplesperpixel==4) AlphaSet(xi,yi,bits[bitsoffset+3]);
#endif //CXIMAGE_SUPPORT_ALPHA
ii++;
xi++;
if (xi>=(int)width){
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