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=(uint32_t)-1;
uint16 photometric=0;
uint16 compression=1;
uint16 orientation=ORIENTATION_TOPLEFT; //<vho>
uint16 res_unit; //<Trifon>
uint32 x, y;
float resolution, offset;
bool isRGB;
uint8_t *bits; //pointer to source data
uint8_t *bits2; //pointer to destination data
cx_try
{
//check if it's a tiff file
if (!m_tif)
cx_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))
cx_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;
info.dwType = CXIMAGE_FORMAT_TIF;
cx_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((int32_t)resolution);
}
if (TIFFGetField(m_tif, TIFFTAG_YRESOLUTION, &resolution))
{
if (res_unit == RESUNIT_CENTIMETER) resolution = (float)(resolution*2.54f + 0.5f);
SetYDPI((int32_t)resolution);
}
if (TIFFGetField(m_tif, TIFFTAG_XPOSITION, &offset)) info.xOffset = (int32_t)offset;
if (TIFFGetField(m_tif, TIFFTAG_YPOSITION, &offset)) info.yOffset = (int32_t)offset;
head.biClrUsed=0;
info.nBkgndIndex =-1;
if (rowsperstrip>height){
rowsperstrip=height;
TIFFSetField(m_tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip);
}
isRGB = /*(bitspersample >= 8) && (VK: it is possible so for RGB to have < 8 bpp!)*/
(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)||(photometric==PHOTOMETRIC_PALETTE)){
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 ((bitspersample > 8) && (photometric==PHOTOMETRIC_PALETTE)) // + VK + (BIG palette! => convert to RGB)
{ head.biBitCount=24;
head.biClrUsed =0;
}
}
if (info.nEscape) cx_throw("Cancelled"); // <vho> - cancel decoding
Create(width,height,head.biBitCount,CXIMAGE_FORMAT_TIF); //image creation
if (!pDib) cx_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) cx_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);
cx_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);
cx_throw("Cancelled");
}
bits = bits2;
for (x = 0; x < width; x++) {
*bits++ = (uint8_t)TIFFGetB(row[x]);
*bits++ = (uint8_t)TIFFGetG(row[x]);
*bits++ = (uint8_t)TIFFGetR(row[x]);
#if CXIMAGE_SUPPORT_ALPHA
if (samplesperpixel==4) AlphaSet(x,y,(uint8_t)TIFFGetA(row[x]));
#endif //CXIMAGE_SUPPORT_ALPHA
}
row += width;
bits2 += info.dwEffWidth;
}
_TIFFfree(raster);
} else {
int32_t BIG_palette = (bitspersample > 8) && // + VK
(photometric==PHOTOMETRIC_PALETTE);
if (BIG_palette && (bitspersample > 24)) // + VK
cx_throw("Too big palette to handle"); // + VK
RGBQuad *pal;
pal=(RGBQuad*)calloc(BIG_palette ? 1<<bitspersample : 256,sizeof(RGBQuad));
// ! VK: it coasts nothing but more correct to use 256 as temp palette storage
// ! VK: but for case of BIG palette it just copied
if (pal==NULL) cx_throw("Unable to allocate TIFF palette");
int32_t bpp = bitspersample <= 8 ? bitspersample : 8; // + VK (to use instead of bitspersample for case of > 8)
// 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 (int32_t i=0; i<(1<<bpp); i++){
pal[i].rgbRed = pal[i].rgbGreen = pal[i].rgbBlue = (uint8_t)(i*(255/((1<<bpp)-1)));
}
} else {
for (int32_t i=0; i<(1<<bpp); i++){
pal[i].rgbRed = pal[i].rgbGreen = pal[i].rgbBlue = (uint8_t)(255-i*(255/((1<<bpp)-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*/ BIG_palette;
if (!BIG_palette) {
int32_t n= 1<<bpp;
while (n-- > 0) {
if (red[n] >= 256 || green[n] >= 256 || blue[n] >= 256) {
Palette16Bits=true;
break;
}
}
}
// load the palette in the DIB
for (int32_t i = (1 << ( BIG_palette ? bitspersample : bpp )) - 1; i >= 0; i--) {
if (Palette16Bits) {
pal[i].rgbRed =(uint8_t) CVT(red[i]);
pal[i].rgbGreen = (uint8_t) CVT(green[i]);
pal[i].rgbBlue = (uint8_t) CVT(blue[i]);
} else {
pal[i].rgbRed = (uint8_t) red[i];
pal[i].rgbGreen = (uint8_t) green[i];
pal[i].rgbBlue = (uint8_t) blue[i];
}
}
break;
}
if (!BIG_palette) { // + VK (BIG palette is stored until image is ready)
SetPalette(pal,/*head.biClrUsed*/ 1<<bpp); //palette assign // * VK
free(pal);
pal = NULL;
}
// read the tiff lines and save them in the DIB
uint32 nrow;
uint32 ys;
int32_t line = CalculateLine(width, bitspersample * samplesperpixel);
int32_t bitsize = TIFFStripSize(m_tif);
//verify bitsize: could be wrong if StripByteCounts is missing.
if (bitsize>(int32_t)(head.biSizeImage*samplesperpixel))
bitsize = head.biSizeImage*samplesperpixel;
if (bitsize<(int32_t)(info.dwEffWidth*rowsperstrip))
bitsize = info.dwEffWidth*rowsperstrip;
if ((bitspersample > 8) && (bitspersample != 16)) // + VK (for bitspersample == 9..15,17..32..64
bitsize *= (bitspersample + 7)/8;
int32_t tiled_image = TIFFIsTiled(m_tif);
uint32 tw=0, tl=0;
uint8_t* tilebuf=NULL;
if (tiled_image){
TIFFGetField(m_tif, TIFFTAG_TILEWIDTH, &tw);
TIFFGetField(m_tif, TIFFTAG_TILELENGTH, &tl);
rowsperstrip = tl;
bitsize = TIFFTileSize(m_tif) * (int32_t)(1+width/tw);
tilebuf = (uint8_t*)malloc(TIFFTileSize(m_tif));
}
bits = (uint8_t*)malloc(bitspersample==16? bitsize*2 : bitsize); // * VK
uint8_t * bits16 = NULL; // + VK
int32_t line16 = 0; // + VK
if (!tiled_image && bitspersample==16) { // + VK +
line16 = line;
line = CalculateLine(width, 8 * samplesperpixel);
bits16 = bits;
bits = (uint8_t*)malloc(bitsize);
}
if (bits==NULL){
if (bits16) free(bits16); // + VK
if (pal) free(pal); // + VK
if (tilebuf)free(tilebuf); // + VK
cx_throw("CxImageTIF can't allocate memory");
}
#ifdef FIX_16BPP_DARKIMG // + VK: for each line, store shift count bits used to fix it
uint8_t* row_shifts = NULL;
if (bits16) row_shifts = (uint8_t*)malloc(height);
#endif
for (ys = 0; ys < height; ys += rowsperstrip) {
if (info.nEscape){ // <vho> - cancel decoding
free(bits);
cx_throw("Cancelled");
}
nrow = (ys + rowsperstrip > height ? height - ys : rowsperstrip);
if (tiled_image){
uint32 imagew = TIFFScanlineSize(m_tif);
uint32 tilew = TIFFTileRowSize(m_tif);
int32_t 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);
cx_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),
(bits16? bits16 : bits), nrow * (bits16 ? line16 : line)) == -1) { // * VK
#ifdef NOT_IGNORE_CORRUPTED
free(bits);
if (bits16) free(bits16); // + VK
cx_throw("Corrupted TIFF file!");
#else
break;
#endif
}
}
for (y = 0; y < nrow; y++) {
int32_t offset=(nrow-y-1)*line;
if ((bitspersample==16) && !BIG_palette) { // * VK
int32_t offset16 = (nrow-y-1)*line16; // + VK
if (bits16) { // + VK +
#ifdef FIX_16BPP_DARKIMG
int32_t the_shift;
uint8_t hi_byte, hi_max=0;
uint32_t xi;
for (xi=0;xi<(uint32)line;xi++) {
hi_byte = bits16[xi*2+offset16+1];
if(hi_byte>hi_max)
hi_max = hi_byte;
}
the_shift = (hi_max == 0) ? 8 : 0;
if (!the_shift)
while( ! (hi_max & 0x80) ) {
the_shift++;
hi_max <<= 1;
}
row_shifts[height-ys-nrow+y] = the_shift;
the_shift = 8 - the_shift;
for (xi=0;xi<(uint32)line;xi++)
bits[xi+offset]= ((bits16[xi*2+offset16+1]<<8) | bits16[xi*2+offset16]) >> the_shift;
#else
for (uint32_t xi=0;xi<(uint32)line;xi++)
bits[xi+offset]=bits16[xi*2+offset16+1];
#endif
} else {
for (uint32_t xi=0;xi<width;xi++)
bits[xi+offset]=bits[xi*2+offset+1];
}
}
if (samplesperpixel==1) {
if (BIG_palette)
if (bits16) {
int32_t offset16 = (nrow-y-1)*line16; // + VK
MoveBitsPal( info.pImage + info.dwEffWidth * (height-ys-nrow+y),
bits16 + offset16, width, bitspersample, pal );
} else
MoveBitsPal( info.pImage + info.dwEffWidth * (height-ys-nrow+y),
bits + offset, width, bitspersample, pal );
else if ((bitspersample == head.biBitCount) ||
(bitspersample == 16)) //simple 8bpp, 4bpp image or 16bpp
memcpy(info.pImage+info.dwEffWidth*(height-ys-nrow+y),bits+offset,min((unsigned)line, info.dwEffWidth));
else
MoveBits( info.pImage + info.dwEffWidth * (height-ys-nrow+y),
bits + offset, width, bitspersample );
} else if (samplesperpixel==2) { //8bpp image with alpha layer
int32_t xi=0;
int32_t ii=0;
int32_t yi=height-ys-nrow+y;
#if CXIMAGE_SUPPORT_ALPHA
if (!pAlpha) AlphaCreate(); // + VK
#endif //CXIMAGE_SUPPORT_ALPHA
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>=(int32_t)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
}
int32_t xi=0;
uint32 ii=0;
int32_t yi=height-ys-nrow+y;
RGBQuad c;
int32_t l,a,b,bitsoffset;
double p,cx,cy,cz,cr,cg,cb;
while (ii</*line*/width){ // * VK
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 =(uint8_t)max(0,min(255,(int32_t)(cr*255)));
c.rgbGreen=(uint8_t)max(0,min(255,(int32_t)(cg*255)));
c.rgbBlue =(uint8_t)max(0,min(255,(int32_t)(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>=(int32_t)width){
yi--;
xi=0;
}
}
}
}
}
free(bits);
if (bits16) free(bits16);
#ifdef FIX_16BPP_DARKIMG
if (row_shifts && (samplesperpixel == 1) && (bitspersample==16) && !BIG_palette) {
// 1. calculate maximum necessary shift
int32_t min_row_shift = 8;
for( y=0; y<height; y++ ) {
if (min_row_shift > row_shifts[y]) min_row_shift = row_shifts[y];
}
// 2. for rows having less shift value, correct such rows:
for( y=0; y<height; y++ ) {
if (min_row_shift < row_shifts[y]) {
int32_t need_shift = row_shifts[y] - min_row_shift;
uint8_t* data = info.pImage + info.dwEffWidth * y;
for( x=0; x<width; x++, data++ )
*data >>= need_shift;
}
}
bool CxImagePCX::Decode(CxFile *hFile)
{
if (hFile == NULL) return false;
PCXHEADER pcxHeader;
int i, x, y, y2, nbytes, count, Height, Width;
BYTE c, ColorMap[PCX_MAXCOLORS][3];
BYTE *pcximage = NULL, *lpHead1 = NULL, *lpHead2 = NULL;
BYTE *pcxplanes, *pcxpixels;
try
{
if (hFile->Read(&pcxHeader,sizeof(PCXHEADER),1)==0) throw "Can't read PCX image";
if (pcxHeader.Manufacturer != PCX_MAGIC) throw "Error: Not a PCX file";
// Check for PCX run length encoding
if (pcxHeader.Encoding != 1) throw "PCX file has unknown encoding scheme";
Width = (pcxHeader.Xmax - pcxHeader.Xmin) + 1;
Height = (pcxHeader.Ymax - pcxHeader.Ymin) + 1;
info.xDPI = pcxHeader.Hres;
info.yDPI = pcxHeader.Vres;
// Check that we can handle this image format
if (pcxHeader.ColorPlanes > 4)
throw "Can't handle image with more than 4 planes";
// Create the image
if (pcxHeader.ColorPlanes >= 3 && pcxHeader.BitsPerPixel == 8){
Create (Width, Height, 24, CXIMAGE_FORMAT_PCX);
#if CXIMAGE_SUPPORT_ALPHA
if (pcxHeader.ColorPlanes==4) AlphaCreate();
#endif //CXIMAGE_SUPPORT_ALPHA
} else if (pcxHeader.ColorPlanes == 4 && pcxHeader.BitsPerPixel == 1)
Create (Width, Height, 4, CXIMAGE_FORMAT_PCX);
else
Create (Width, Height, pcxHeader.BitsPerPixel, CXIMAGE_FORMAT_PCX);
if (info.nEscape) throw "Cancelled"; // <vho> - cancel decoding
//Read the image and check if it's ok
nbytes = pcxHeader.BytesPerLine * pcxHeader.ColorPlanes * Height;
lpHead1 = pcximage = (BYTE*)malloc(nbytes);
while (nbytes > 0){
if (hFile == NULL || hFile->Eof()) throw "corrupted PCX";
hFile->Read(&c,1,1);
if ((c & 0XC0) != 0XC0){ // Repeated group
*pcximage++ = c;
--nbytes;
continue;
}
count = c & 0X3F; // extract count
hFile->Read(&c,1,1);
if (count > nbytes) throw "repeat count spans end of image";
nbytes -= count;
while (--count >=0) *pcximage++ = c;
}
pcximage = lpHead1;
//store the palette
for (i = 0; i < 16; i++){
ColorMap[i][0] = pcxHeader.ColorMap[i][0];
ColorMap[i][1] = pcxHeader.ColorMap[i][1];
ColorMap[i][2] = pcxHeader.ColorMap[i][2];
}
if (pcxHeader.BitsPerPixel == 8 && pcxHeader.ColorPlanes == 1){
hFile->Read(&c,1,1);
if (c != PCX_256_COLORS) throw "bad color map signature";
for (i = 0; i < PCX_MAXCOLORS; i++){
hFile->Read(&ColorMap[i][0],1,1);
hFile->Read(&ColorMap[i][1],1,1);
hFile->Read(&ColorMap[i][2],1,1);
}
}
if (pcxHeader.BitsPerPixel == 1 && pcxHeader.ColorPlanes == 1){
ColorMap[0][0] = ColorMap[0][1] = ColorMap[0][2] = 0;
ColorMap[1][0] = ColorMap[1][1] = ColorMap[1][2] = 255;
}
for (DWORD idx=0; idx<head.biClrUsed; idx++) SetPaletteColor((BYTE)idx,ColorMap[idx][0],ColorMap[idx][1],ColorMap[idx][2]);
lpHead2 = pcxpixels = (BYTE *)malloc(Width + pcxHeader.BytesPerLine * 8);
// Convert the image
for (y = 0; y < Height; y++){
if (info.nEscape) throw "Cancelled"; // <vho> - cancel decoding
y2=Height-1-y;
pcxpixels = lpHead2;
pcxplanes = pcximage + (y * pcxHeader.BytesPerLine * pcxHeader.ColorPlanes);
if (pcxHeader.ColorPlanes == 3 && pcxHeader.BitsPerPixel == 8){
// Deal with 24 bit color image
for (x = 0; x < Width; x++){
SetPixelColor(x,y2,RGB(pcxplanes[x],pcxplanes[pcxHeader.BytesPerLine + x],pcxplanes[2*pcxHeader.BytesPerLine + x]));
}
continue;
#if CXIMAGE_SUPPORT_ALPHA
} else if (pcxHeader.ColorPlanes == 4 && pcxHeader.BitsPerPixel == 8){
for (x = 0; x < Width; x++){
SetPixelColor(x,y2,RGB(pcxplanes[x],pcxplanes[pcxHeader.BytesPerLine + x],pcxplanes[2*pcxHeader.BytesPerLine + x]));
AlphaSet(x,y2,pcxplanes[3*pcxHeader.BytesPerLine + x]);
}
continue;
#endif //CXIMAGE_SUPPORT_ALPHA
} else if (pcxHeader.ColorPlanes == 1) {
PCX_UnpackPixels(pcxpixels, pcxplanes, pcxHeader.BytesPerLine, pcxHeader.ColorPlanes, pcxHeader.BitsPerPixel);
} else {
PCX_PlanesToPixels(pcxpixels, pcxplanes, pcxHeader.BytesPerLine, pcxHeader.ColorPlanes, pcxHeader.BitsPerPixel);
}
for (x = 0; x < Width; x++) SetPixelIndex(x,y2,pcxpixels[x]);
}
} catch (char *message) {
strncpy(info.szLastError,message,255);
if (lpHead1){ free(lpHead1); lpHead1 = NULL; }
if (lpHead2){ free(lpHead2); lpHead2 = NULL; }
return false;
}
if (lpHead1){ free(lpHead1); lpHead1 = NULL; }
if (lpHead2){ free(lpHead2); lpHead2 = NULL; }
return true;
}
bool CxImageICO::Decode(CxFile *hFile)
{
if (hFile==NULL) return false;
DWORD off = hFile->Tell(); //<yuandi>
int page=info.nFrame; //internal icon structure indexes
// read the first part of the header
ICONHEADER icon_header;
hFile->Read(&icon_header,sizeof(ICONHEADER),1);
icon_header.idType = my_ntohs(icon_header.idType);
icon_header.idCount = my_ntohs(icon_header.idCount);
// check if it's an icon or a cursor
if ((icon_header.idReserved == 0) && ((icon_header.idType == 1)||(icon_header.idType == 2))) {
info.nNumFrames = icon_header.idCount;
// load the icon descriptions
ICONDIRENTRY *icon_list = (ICONDIRENTRY *)malloc(icon_header.idCount * sizeof(ICONDIRENTRY));
int c;
for (c = 0; c < icon_header.idCount; c++) {
hFile->Read(icon_list + c, sizeof(ICONDIRENTRY), 1);
icon_list[c].wPlanes = my_ntohs(icon_list[c].wPlanes);
icon_list[c].wBitCount = my_ntohs(icon_list[c].wBitCount);
icon_list[c].dwBytesInRes = my_ntohl(icon_list[c].dwBytesInRes);
icon_list[c].dwImageOffset = my_ntohl(icon_list[c].dwImageOffset);
}
if ((page>=0)&&(page<icon_header.idCount)){
if (info.nEscape == -1) {
// Return output dimensions only
head.biWidth = icon_list[page].bWidth;
head.biHeight = icon_list[page].bHeight;
#if CXIMAGE_SUPPORT_PNG
if (head.biWidth==0 && head.biHeight==0)
{ // Vista icon support
hFile->Seek(off + icon_list[page].dwImageOffset, SEEK_SET);
CxImage png;
png.SetEscape(-1);
if (png.Decode(hFile,CXIMAGE_FORMAT_PNG)){
Transfer(png);
info.nNumFrames = icon_header.idCount;
}
}
#endif //CXIMAGE_SUPPORT_PNG
free(icon_list);
info.dwType = CXIMAGE_FORMAT_ICO;
return true;
}
// get the bit count for the colors in the icon <CoreyRLucier>
BITMAPINFOHEADER bih;
hFile->Seek(off + icon_list[page].dwImageOffset, SEEK_SET);
if (icon_list[page].bWidth==0 && icon_list[page].bHeight==0)
{ // Vista icon support
#if CXIMAGE_SUPPORT_PNG
CxImage png;
if (png.Decode(hFile,CXIMAGE_FORMAT_PNG)){
Transfer(png);
info.nNumFrames = icon_header.idCount;
}
SetType(CXIMAGE_FORMAT_ICO);
#endif //CXIMAGE_SUPPORT_PNG
}
else
{ // standard icon
hFile->Read(&bih,sizeof(BITMAPINFOHEADER),1);
bihtoh(&bih);
c = bih.biBitCount;
// allocate memory for one icon
Create(icon_list[page].bWidth,icon_list[page].bHeight, c, CXIMAGE_FORMAT_ICO); //image creation
// read the palette
RGBQUAD pal[256];
if (bih.biClrUsed)
hFile->Read(pal,bih.biClrUsed*sizeof(RGBQUAD), 1);
else
hFile->Read(pal,head.biClrUsed*sizeof(RGBQUAD), 1);
SetPalette(pal,head.biClrUsed); //palette assign
//read the icon
if (c<=24){
hFile->Read(info.pImage, head.biSizeImage, 1);
} else { // 32 bit icon
BYTE* buf=(BYTE*)malloc(4*head.biHeight*head.biWidth);
BYTE* src = buf;
hFile->Read(buf, 4*head.biHeight*head.biWidth, 1);
#if CXIMAGE_SUPPORT_ALPHA
if (!AlphaIsValid()) AlphaCreate();
#endif //CXIMAGE_SUPPORT_ALPHA
for (long y = 0; y < head.biHeight; y++) {
BYTE* dst = GetBits(y);
for(long x=0;x<head.biWidth;x++){
*dst++=src[0];
*dst++=src[1];
*dst++=src[2];
#if CXIMAGE_SUPPORT_ALPHA
AlphaSet(x,y,src[3]);
#endif //CXIMAGE_SUPPORT_ALPHA
src+=4;
}
}
free(buf);
}
// apply the AND and XOR masks
int maskwdt = ((head.biWidth+31) / 32) * 4; //line width of AND mask (always 1 Bpp)
int masksize = head.biHeight * maskwdt; //size of mask
BYTE *mask = (BYTE *)malloc(masksize);
if (hFile->Read(mask, masksize, 1)){
bool bGoodMask=false;
for (int im=0;im<masksize;im++){
if (mask[im]!=255){
bGoodMask=true;
break;
}
}
if (bGoodMask && c != 32){
#if CXIMAGE_SUPPORT_ALPHA
bool bNeedAlpha = false;
if (!AlphaIsValid()){
AlphaCreate();
} else {
bNeedAlpha=true; //32bit icon
}
int x,y;
for (y = 0; y < head.biHeight; y++) {
for (x = 0; x < head.biWidth; x++) {
if (((mask[y*maskwdt+(x>>3)]>>(7-x%8))&0x01)){
AlphaSet(x,y,0);
bNeedAlpha=true;
}
}
}
if (!bNeedAlpha) AlphaDelete();
#endif //CXIMAGE_SUPPORT_ALPHA
//check if there is only one transparent color
RGBQUAD cc,ct;
long* pcc = (long*)&cc;
long* pct = (long*)&ct;
int nTransColors=0;
int nTransIndex=0;
for (y = 0; y < head.biHeight; y++){
for (x = 0; x < head.biWidth; x++){
if (((mask[y*maskwdt+(x>>3)] >> (7-x%8)) & 0x01)){
cc = GetPixelColor(x,y,false);
if (nTransColors==0){
nTransIndex = GetPixelIndex(x,y);
nTransColors++;
ct = cc;
} else {
if (*pct!=*pcc){
nTransColors++;
}
}
}
}
}
if (nTransColors==1){
SetTransColor(ct);
SetTransIndex(nTransIndex);
#if CXIMAGE_SUPPORT_ALPHA
AlphaDelete(); //because we have a unique transparent color in the image
#endif //CXIMAGE_SUPPORT_ALPHA
}
// <vho> - Transparency support w/o Alpha support
if (c <= 8){ // only for icons with less than 256 colors (XP icons need alpha).
// find a color index, which is not used in the image
// it is almost sure to find one, bcs. nobody uses all possible colors for an icon
BYTE colorsUsed[256];
memset(colorsUsed, 0, sizeof(colorsUsed));
for (y = 0; y < head.biHeight; y++){
for (x = 0; x < head.biWidth; x++){
colorsUsed[BlindGetPixelIndex(x,y)] = 1;
}
}
int iTransIdx = -1;
for (x = (int)(head.biClrUsed-1); x>=0 ; x--){
if (colorsUsed[x] == 0){
iTransIdx = x; // this one is not in use. we may use it as transparent color
break;
}
}
// Go thru image and set unused color as transparent index if needed
if (iTransIdx >= 0){
bool bNeedTrans = false;
for (y = 0; y < head.biHeight; y++){
for (x = 0; x < head.biWidth; x++){
// AND mask (Each Byte represents 8 Pixels)
if (((mask[y*maskwdt+(x>>3)] >> (7-x%8)) & 0x01)){
// AND mask is set (!=0). This is a transparent part
SetPixelIndex(x, y, (BYTE)iTransIdx);
bNeedTrans = true;
}
}
}
// set transparent index if needed
if (bNeedTrans) SetTransIndex(iTransIdx);
#if CXIMAGE_SUPPORT_ALPHA
AlphaDelete(); //because we have a transparent color in the palette
#endif //CXIMAGE_SUPPORT_ALPHA
}
}
} else if(c != 32){
bool CxImageICO::Decode(CxFile *hFile)
{
if (hFile==NULL) return false;
DWORD off = hFile->Tell(); //<yuandi>
int page=info.nFrame; //internal icon structure indexes
// read the first part of the header
ICONHEADER icon_header;
hFile->Read(&icon_header,sizeof(ICONHEADER),1);
// check if it's an icon
if ((icon_header.idReserved == 0) && (icon_header.idType == 1)) {
info.nNumFrames = icon_header.idCount;
// load the icon descriptions
ICONDIRENTRY *icon_list = (ICONDIRENTRY *)malloc(icon_header.idCount * sizeof(ICONDIRENTRY));
int c;
for (c = 0; c < icon_header.idCount; c++)
hFile->Read(icon_list + c, sizeof(ICONDIRENTRY), 1);
if ((info.nFrame>=0)&&(info.nFrame<icon_header.idCount)){
// get the bit count for the colors in the icon <CoreyRLucier>
BITMAPINFOHEADER bih;
hFile->Seek(off + icon_list[page].dwImageOffset, SEEK_SET);
hFile->Read(&bih,sizeof(BITMAPINFOHEADER),1);
c = bih.biBitCount;
// allocate memory for one icon
Create(icon_list[page].bWidth,icon_list[page].bHeight, c, CXIMAGE_FORMAT_ICO); //image creation
// read the palette
RGBQUAD pal[256];
hFile->Read(pal,head.biClrUsed*sizeof(RGBQUAD), 1);
SetPalette(pal,head.biClrUsed); //palette assign
//read the icon
if (c<=24){
hFile->Read(info.pImage, head.biSizeImage, 1);
} else { // 32 bit icon
BYTE* dst = info.pImage;
BYTE* buf=(BYTE*)malloc(4*head.biHeight*head.biWidth);
BYTE* src = buf;
hFile->Read(buf, 4*head.biHeight*head.biWidth, 1);
#if CXIMAGE_SUPPORT_ALPHA
if (!AlphaIsValid()) AlphaCreate();
#endif //CXIMAGE_SUPPORT_ALPHA
for (long y = 0; y < head.biHeight; y++) {
for(long x=0;x<head.biWidth;x++){
*dst++=src[0];
*dst++=src[1];
*dst++=src[2];
#if CXIMAGE_SUPPORT_ALPHA
AlphaSet(x,y,src[3]);
#endif //CXIMAGE_SUPPORT_ALPHA
src+=4;
}
}
free(buf);
}
// apply the AND and XOR masks
int maskwdt = ((head.biWidth+31) / 32) * 4; //line width of AND mask (always 1 Bpp)
int masksize = head.biHeight * maskwdt; //size of mask
BYTE *mask = (BYTE *)malloc(masksize);
if (hFile->Read(mask, masksize, 1)){
#if CXIMAGE_SUPPORT_ALPHA
bool bNeedAlpha = false;
if (!AlphaIsValid()){
AlphaCreate();
AlphaSet(255);
} else {
bNeedAlpha=true; //32bit icon
}
for (int y = 0; y < head.biHeight; y++) {
for (int x = 0; x < head.biWidth; x++) {
if (((mask[y*maskwdt+(x>>3)]>>(7-x%8))&0x01)){
AlphaSet(x,y,0);
bNeedAlpha=true;
}
}
}
if (!bNeedAlpha) AlphaDelete();
#endif //CXIMAGE_SUPPORT_ALPHA
if (c==24){ //check if there is only one transparent color
RGBQUAD cc,ct;
long* pcc = (long*)&cc;
long* pct = (long*)&ct;
int nTransColors=0;
for (int y = 0; y < head.biHeight; y++){
for (int x = 0; x < head.biWidth; x++){
if (((mask[y*maskwdt+(x>>3)] >> (7-x%8)) & 0x01)){
cc = GetPixelColor(x,y);
if (nTransColors==0){
nTransColors++;
ct = cc;
} else {
if (*pct!=*pcc){
nTransColors++;
}
}
}
}
}
if (nTransColors==1){
SetTransColor(ct);
SetTransIndex(0);
#if CXIMAGE_SUPPORT_ALPHA
AlphaDelete(); //because we have a unique transparent color in the image
#endif //CXIMAGE_SUPPORT_ALPHA
}
}
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){
yi--;
xi=0;
}
}
}
}
}
free(bits);
if (tiled_image) free(tilebuf);
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);
if (info.nEscape==-1) return true;
return false;
}
TIFFClose(m_tif);
return true;
}
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; //<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
cx_try
{
//check if it's a tiff file
if (!m_tif)
cx_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))
cx_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;
info.dwType = CXIMAGE_FORMAT_TIF;
cx_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) && (VK: it is possible so for RGB to have < 8 bpp!)*/
(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)||(photometric==PHOTOMETRIC_PALETTE)){
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 ((bitspersample > 8) && (photometric==PHOTOMETRIC_PALETTE)) // + VK + (BIG palette! => convert to RGB)
{ head.biBitCount=24;
head.biClrUsed =0;
}
}
if (info.nEscape) cx_throw("Cancelled"); // <vho> - cancel decoding
Create(width,height,head.biBitCount,CXIMAGE_FORMAT_TIF); //image creation
if (!pDib) cx_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) cx_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);
cx_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);
cx_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 {
int BIG_palette = (bitspersample > 8) && // + VK
(photometric==PHOTOMETRIC_PALETTE);
if (BIG_palette && (bitspersample > 24)) // + VK
cx_throw("Too big palette to handle"); // + VK
RGBQUAD *pal;
pal=(RGBQUAD*)calloc(BIG_palette ? 1<<bitspersample : 256,sizeof(RGBQUAD));
// ! VK: it coasts nothing but more correct to use 256 as temp palette storage
// ! VK: but for case of BIG palette it just copied
if (pal==NULL) cx_throw("Unable to allocate TIFF palette");
int bpp = bitspersample <= 8 ? bitspersample : 8; // + VK (to use instead of bitspersample for case of > 8)
// 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 (int i=0; i<(1<<bpp); i++){
pal[i].rgbRed = pal[i].rgbGreen = pal[i].rgbBlue = (BYTE)(i*(255/((1<<bpp)-1)));
}
} else {
for (int i=0; i<(1<<bpp); i++){
pal[i].rgbRed = pal[i].rgbGreen = pal[i].rgbBlue = (BYTE)(255-i*(255/((1<<bpp)-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*/ BIG_palette;
if (!BIG_palette) {
int n= 1<<bpp;
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 << ( BIG_palette ? bitspersample : bpp )) - 1; i >= 0; i--) {
if (Palette16Bits) {