////////////////////////////////////////////////////////////////////////////////
// HistogramLog function by <dave> : dave(at)posortho(dot)com
bool CxImage::HistogramLog()
{
if (!pDib) return false;
//q(i,j) = 255/log(1 + |high|) * log(1 + |p(i,j)|);
int x, y, i;
RGBQUAD color;
RGBQUAD yuvClr;
unsigned int YVal, high = 1;
// Find Highest Luminance Value in the Image
if( head.biClrUsed == 0 ){ // No Palette
for(y=0; y < head.biHeight; y++){
info.nProgress = (long)(50*y/head.biHeight);
for(x=0; x < head.biWidth; x++){
color = GetPixelColor( x, y );
YVal = (unsigned int)RGB2GRAY(color.rgbRed, color.rgbGreen, color.rgbBlue);
if (YVal > high ) high = YVal;
}
}
} else { // Palette
for(i = 0; i < (int)head.biClrUsed; i++){
color = GetPaletteColor((BYTE)i);
YVal = (unsigned int)RGB2GRAY(color.rgbRed, color.rgbGreen, color.rgbBlue);
if (YVal > high ) high = YVal;
}
}
// Logarithm Operator
double k = 255.0 / ::log( 1.0 + (double)high );
if( head.biClrUsed == 0 ){
for( y = 0; y < head.biHeight; y++ ){
info.nProgress = (long)(50+50*y/head.biHeight);
for( x = 0; x < head.biWidth; x++ ){
color = GetPixelColor( x, y );
yuvClr = RGBtoYUV( color );
yuvClr.rgbRed = (BYTE)(k * ::log( 1.0 + (double)yuvClr.rgbRed ) );
color = YUVtoRGB( yuvClr );
SetPixelColor( x, y, color );
}
}
} else {
for(i = 0; i < (int)head.biClrUsed; i++){
color = GetPaletteColor( (BYTE)i );
yuvClr = RGBtoYUV( color );
yuvClr.rgbRed = (BYTE)(k * ::log( 1.0 + (double)yuvClr.rgbRed ) );
color = YUVtoRGB( yuvClr );
SetPaletteColor( (BYTE)i, color );
}
}
return true;
}
/**
* Resets the alpha palette
*/
void CxImage::AlphaPaletteClear()
{
RGBQUAD c;
for(WORD ip=0; ip<head.biClrUsed;ip++){
c=GetPaletteColor((BYTE)ip);
c.rgbReserved=0;
SetPaletteColor((BYTE)ip,c);
}
}
/**
* Resets the alpha palette
*/
void CxImage::AlphaPaletteClear()
{
RGBQUAD c;
for(uint16_t ip=0; ip<head.biClrUsed;ip++){
c=GetPaletteColor((uint8_t)ip);
c.rgbReserved=0;
SetPaletteColor((uint8_t)ip,c);
}
}
////////////////////////////////////////////////////////////////////////////////
// HistogramRoot function by <dave> : dave(at)posortho(dot)com
bool CxImage::HistogramRoot()
{
if (!pDib) return false;
//q(i,j) = sqrt(|p(i,j)|);
int x, y, i;
RGBQUAD color;
RGBQUAD yuvClr;
double dtmp;
unsigned int YVal, high = 1;
// Find Highest Luminance Value in the Image
if( head.biClrUsed == 0 ){ // No Palette
for(y=0; y < head.biHeight; y++){
info.nProgress = (long)(50*y/head.biHeight);
if (info.nEscape) break;
for(x=0; x < head.biWidth; x++){
color = BlindGetPixelColor( x, y );
YVal = (unsigned int)RGB2GRAY(color.rgbRed, color.rgbGreen, color.rgbBlue);
if (YVal > high ) high = YVal;
}
}
} else { // Palette
for(i = 0; i < (int)head.biClrUsed; i++){
color = GetPaletteColor((BYTE)i);
YVal = (unsigned int)RGB2GRAY(color.rgbRed, color.rgbGreen, color.rgbBlue);
if (YVal > high ) high = YVal;
}
}
// Root Operator
double k = 128.0 / ::log( 1.0 + (double)high );
if( head.biClrUsed == 0 ){
for( y = 0; y < head.biHeight; y++ ){
info.nProgress = (long)(50+50*y/head.biHeight);
if (info.nEscape) break;
for( x = 0; x < head.biWidth; x++ ){
color = BlindGetPixelColor( x, y );
yuvClr = RGBtoYUV( color );
dtmp = k * ::sqrt( (double)yuvClr.rgbRed );
if ( dtmp > 255.0 ) dtmp = 255.0;
if ( dtmp < 0 ) dtmp = 0;
yuvClr.rgbRed = (BYTE)dtmp;
color = YUVtoRGB( yuvClr );
BlindSetPixelColor( x, y, color );
}
}
} else {
for(i = 0; i < (int)head.biClrUsed; i++){
color = GetPaletteColor( (BYTE)i );
yuvClr = RGBtoYUV( color );
dtmp = k * ::sqrt( (double)yuvClr.rgbRed );
if ( dtmp > 255.0 ) dtmp = 255.0;
if ( dtmp < 0 ) dtmp = 0;
yuvClr.rgbRed = (BYTE)dtmp;
color = YUVtoRGB( yuvClr );
SetPaletteColor( (BYTE)i, color );
}
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
// HistogramNormalize function by <dave> : dave(at)posortho(dot)com
bool CxImage::HistogramNormalize()
{
if (!pDib) return false;
int histogram[256];
int threshold_intensity, intense;
int x, y, i;
unsigned int normalize_map[256];
unsigned int high, low, YVal;
RGBQUAD color;
RGBQUAD yuvClr;
memset( &histogram, 0, sizeof( int ) * 256 );
memset( &normalize_map, 0, sizeof( unsigned int ) * 256 );
// form histogram
for(y=0; y < head.biHeight; y++){
info.nProgress = (long)(50*y/head.biHeight);
if (info.nEscape) break;
for(x=0; x < head.biWidth; x++){
color = BlindGetPixelColor( x, y );
YVal = (unsigned int)RGB2GRAY(color.rgbRed, color.rgbGreen, color.rgbBlue);
histogram[YVal]++;
}
}
// find histogram boundaries by locating the 1 percent levels
threshold_intensity = ( head.biWidth * head.biHeight) / 100;
intense = 0;
for( low = 0; low < 255; low++ ){
intense += histogram[low];
if( intense > threshold_intensity ) break;
}
intense = 0;
for( high = 255; high != 0; high--){
intense += histogram[ high ];
if( intense > threshold_intensity ) break;
}
if ( low == high ){
// Unreasonable contrast; use zero threshold to determine boundaries.
threshold_intensity = 0;
intense = 0;
for( low = 0; low < 255; low++){
intense += histogram[low];
if( intense > threshold_intensity ) break;
}
intense = 0;
for( high = 255; high != 0; high-- ){
intense += histogram [high ];
if( intense > threshold_intensity ) break;
}
}
if( low == high ) return false; // zero span bound
// Stretch the histogram to create the normalized image mapping.
for(i = 0; i <= 255; i++){
if ( i < (int) low ){
normalize_map[i] = 0;
} else {
if(i > (int) high)
normalize_map[i] = 255;
else
normalize_map[i] = ( 255 - 1) * ( i - low) / ( high - low );
}
}
// Normalize
if( head.biClrUsed == 0 ){
for( y = 0; y < head.biHeight; y++ ){
info.nProgress = (long)(50+50*y/head.biHeight);
if (info.nEscape) break;
for( x = 0; x < head.biWidth; x++ ){
color = BlindGetPixelColor( x, y );
yuvClr = RGBtoYUV( color );
yuvClr.rgbRed = (BYTE)normalize_map[yuvClr.rgbRed];
color = YUVtoRGB( yuvClr );
BlindSetPixelColor( x, y, color );
}
}
} else {
for(i = 0; i < (int)head.biClrUsed; i++){
color = GetPaletteColor( (BYTE)i );
yuvClr = RGBtoYUV( color );
yuvClr.rgbRed = (BYTE)normalize_map[yuvClr.rgbRed];
color = YUVtoRGB( yuvClr );
SetPaletteColor( (BYTE)i, color );
}
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
// HistogramEqualize function by <dave> : dave(at)posortho(dot)com
bool CxImage::HistogramEqualize()
{
if (!pDib) return false;
int histogram[256];
int map[256];
int equalize_map[256];
int x, y, i, j;
RGBQUAD color;
RGBQUAD yuvClr;
unsigned int YVal, high, low;
memset( &histogram, 0, sizeof(int) * 256 );
memset( &map, 0, sizeof(int) * 256 );
memset( &equalize_map, 0, sizeof(int) * 256 );
// form histogram
for(y=0; y < head.biHeight; y++){
info.nProgress = (long)(50*y/head.biHeight);
if (info.nEscape) break;
for(x=0; x < head.biWidth; x++){
color = BlindGetPixelColor( x, y );
YVal = (unsigned int)RGB2GRAY(color.rgbRed, color.rgbGreen, color.rgbBlue);
histogram[YVal]++;
}
}
// integrate the histogram to get the equalization map.
j = 0;
for(i=0; i <= 255; i++){
j += histogram[i];
map[i] = j;
}
// equalize
low = map[0];
high = map[255];
if (low == high) return false;
for( i = 0; i <= 255; i++ ){
equalize_map[i] = (unsigned int)((((double)( map[i] - low ) ) * 255) / ( high - low ) );
}
// stretch the histogram
if(head.biClrUsed == 0){ // No Palette
for( y = 0; y < head.biHeight; y++ ){
info.nProgress = (long)(50+50*y/head.biHeight);
if (info.nEscape) break;
for( x = 0; x < head.biWidth; x++ ){
color = BlindGetPixelColor( x, y );
yuvClr = RGBtoYUV(color);
yuvClr.rgbRed = (BYTE)equalize_map[yuvClr.rgbRed];
color = YUVtoRGB(yuvClr);
BlindSetPixelColor( x, y, color );
}
}
} else { // Palette
for( i = 0; i < (int)head.biClrUsed; i++ ){
color = GetPaletteColor((BYTE)i);
yuvClr = RGBtoYUV(color);
yuvClr.rgbRed = (BYTE)equalize_map[yuvClr.rgbRed];
color = YUVtoRGB(yuvClr);
SetPaletteColor( (BYTE)i, color );
}
}
return true;
}
/**
* HistogramStretch
* \param method: 0 = luminance (default), 1 = linked channels , 2 = independent channels.
* \return true if everything is ok
* \author [dave] and [nipper]
*/
bool CxImage::HistogramStretch(long method)
{
if (!pDib) return false;
if ((head.biBitCount==8) && IsGrayScale()){
// get min/max info
BYTE minc = 255, maxc = 0;
BYTE gray;
long y;
double dbScaler = 50.0/head.biHeight;
for (y=0; y<head.biHeight; y++)
{
info.nProgress = (long)(y*dbScaler);
for (long x=0; x<head.biWidth; x++) {
gray = GetPixelIndex(x, y);
if (gray < minc) minc = gray;
if (gray > maxc) maxc = gray;
}
}
if (minc == 0 && maxc == 255) return true;
// calculate LUT
BYTE lut[256];
BYTE range = maxc - minc;
if (range != 0){
for (long x = minc; x <= maxc; x++){
lut[x] = (BYTE)(255 * (x - minc) / range);
}
} else lut[minc] = minc;
for (y=0; y<head.biHeight; y++) {
info.nProgress = (long)(50.0+y*dbScaler);
for (long x=0; x<head.biWidth; x++)
{
SetPixelIndex(x, y, lut[GetPixelIndex(x, y)]);
}
}
} else {
switch(method){
case 1:
{ // <nipper>
// get min/max info
BYTE minc = 255, maxc = 0;
RGBQUAD color;
long y;
for (y=0; y<head.biHeight; y++)
{
for (long x=0; x<head.biWidth; x++)
{
color = GetPixelColor(x, y);
if (color.rgbRed < minc) minc = color.rgbRed;
if (color.rgbBlue < minc) minc = color.rgbBlue;
if (color.rgbGreen < minc) minc = color.rgbGreen;
if (color.rgbRed > maxc) maxc = color.rgbRed;
if (color.rgbBlue > maxc) maxc = color.rgbBlue;
if (color.rgbGreen > maxc) maxc = color.rgbGreen;
}
}
if (minc == 0 && maxc == 255)
return true;
// calculate LUT
BYTE lut[256];
BYTE range = maxc - minc;
if (range != 0){
for (long x = minc; x <= maxc; x++){
lut[x] = (BYTE)(255 * (x - minc) / range);
}
} else lut[minc] = minc;
// normalize image
double dbScaler = 100.0/head.biHeight;
for (y=0; y<head.biHeight; y++) {
info.nProgress = (long)(y*dbScaler);
for (long x=0; x<head.biWidth; x++)
{
color = GetPixelColor(x, y);
color.rgbRed = lut[color.rgbRed];
color.rgbBlue = lut[color.rgbBlue];
color.rgbGreen = lut[color.rgbGreen];
SetPixelColor(x, y, color);
}
}
}
break;
case 2:
{ // <nipper>
// get min/max info
BYTE minR = 255, maxR = 0;
BYTE minG = 255, maxG = 0;
BYTE minB = 255, maxB = 0;
RGBQUAD color;
long y;
for (y=0; y<head.biHeight; y++)
{
for (long x=0; x<head.biWidth; x++)
{
color = GetPixelColor(x, y);
if (color.rgbRed < minR) minR = color.rgbRed;
if (color.rgbBlue < minB) minB = color.rgbBlue;
if (color.rgbGreen < minG) minG = color.rgbGreen;
if (color.rgbRed > maxR) maxR = color.rgbRed;
if (color.rgbBlue > maxB) maxB = color.rgbBlue;
if (color.rgbGreen > maxG) maxG = color.rgbGreen;
}
}
if (minR == 0 && maxR == 255 && minG == 0 && maxG == 255 && minB == 0 && maxB == 255)
return true;
// calculate LUT
BYTE lutR[256];
BYTE range = maxR - minR;
if (range != 0) {
for (long x = minR; x <= maxR; x++){
lutR[x] = (BYTE)(255 * (x - minR) / range);
}
} else lutR[minR] = minR;
BYTE lutG[256];
range = maxG - minG;
if (range != 0) {
for (long x = minG; x <= maxG; x++){
lutG[x] = (BYTE)(255 * (x - minG) / range);
}
} else lutG[minG] = minG;
BYTE lutB[256];
range = maxB - minB;
if (range != 0) {
for (long x = minB; x <= maxB; x++){
lutB[x] = (BYTE)(255 * (x - minB) / range);
}
} else lutB[minB] = minB;
// normalize image
double dbScaler = 100.0/head.biHeight;
for (y=0; y<head.biHeight; y++)
{
info.nProgress = (long)(y*dbScaler);
for (long x=0; x<head.biWidth; x++)
{
color = GetPixelColor(x, y);
color.rgbRed = lutR[color.rgbRed];
color.rgbBlue = lutB[color.rgbBlue];
color.rgbGreen = lutG[color.rgbGreen];
SetPixelColor(x, y, color);
}
}
}
break;
default:
{ // <dave>
// S = ( R - C ) ( B - A / D - C )
double alimit = 0.0;
double blimit = 255.0;
double lowerc = 255.0;
double upperd = 0.0;
double tmpGray;
RGBQUAD color;
RGBQUAD yuvClr;
double stretcheds;
if ( head.biClrUsed == 0 ){
long x, y, xmin, xmax, ymin, ymax;
xmin = ymin = 0;
xmax = head.biWidth;
ymax = head.biHeight;
for( y = ymin; y < ymax; y++ ){
info.nProgress = (long)(50*y/ymax);
for( x = xmin; x < xmax; x++ ){
color = GetPixelColor( x, y );
tmpGray = RGB2GRAY(color.rgbRed, color.rgbGreen, color.rgbBlue);
if ( tmpGray < lowerc ) lowerc = tmpGray;
if ( tmpGray > upperd ) upperd = tmpGray;
}
}
if (upperd==lowerc) return false;
for( y = ymin; y < ymax; y++ ){
info.nProgress = (long)(50+50*y/ymax);
for( x = xmin; x < xmax; x++ ){
color = GetPixelColor( x, y );
yuvClr = RGBtoYUV(color);
// Stretch Luminance
tmpGray = (double)yuvClr.rgbRed;
stretcheds = (double)(tmpGray - lowerc) * ( (blimit - alimit) / (upperd - lowerc) ); // + alimit;
if ( stretcheds < 0.0 ) stretcheds = 0.0;
else if ( stretcheds > 255.0 ) stretcheds = 255.0;
yuvClr.rgbRed = (BYTE)stretcheds;
color = YUVtoRGB(yuvClr);
SetPixelColor( x, y, color );
}
}
} else {
DWORD j;
for( j = 0; j < head.biClrUsed; j++ ){
color = GetPaletteColor( (BYTE)j );
tmpGray = RGB2GRAY(color.rgbRed, color.rgbGreen, color.rgbBlue);
if ( tmpGray < lowerc ) lowerc = tmpGray;
if ( tmpGray > upperd ) upperd = tmpGray;
}
if (upperd==lowerc) return false;
for( j = 0; j < head.biClrUsed; j++ ){
color = GetPaletteColor( (BYTE)j );
yuvClr = RGBtoYUV( color );
// Stretch Luminance
tmpGray = (double)yuvClr.rgbRed;
stretcheds = (double)(tmpGray - lowerc) * ( (blimit - alimit) / (upperd - lowerc) ); // + alimit;
if ( stretcheds < 0.0 ) stretcheds = 0.0;
else if ( stretcheds > 255.0 ) stretcheds = 255.0;
yuvClr.rgbRed = (BYTE)stretcheds;
color = YUVtoRGB(yuvClr);
SetPaletteColor( (BYTE)j, color );
}
}
}
}
}
return true;
}
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 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 && AlphaIsValid()) { 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) {
/* <abe> some viewers do not handle PHOTOMETRIC_MINISBLACK:
* let's transform the image in PHOTOMETRIC_MINISWHITE
*/
//invert the colors
RGBQUAD tempRGB=GetPaletteColor(0);
SetPaletteColor(0,GetPaletteColor(1));
SetPaletteColor(1,tempRGB);
//invert the pixels
BYTE *iSrc=info.pImage;
for (unsigned long i=0;i<head.biSizeImage;i++){
*iSrc=(BYTE)~(*(iSrc));
iSrc++;
}
photometric = PHOTOMETRIC_MINISWHITE;
//photometric = PHOTOMETRIC_MINISBLACK;
} else {
photometric = PHOTOMETRIC_MINISWHITE;
}
break;
case 4: // Check if the DIB has a color or a greyscale palette
case 8:
photometric = PHOTOMETRIC_MINISBLACK; //default to gray scale
for (x = 0; x < head.biClrUsed; x++) {
if ((rgb->rgbRed != 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 (AlphaIsValid() && 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<head.biClrUsed;a++){ //swap blue and red components
b=pal[a].rgbBlue; pal[a].rgbBlue=pal[a].rgbRed; pal[a].rgbRed=b;
}
}
// handle standard width/height/bpp stuff
TIFFSetField(m_tif, TIFFTAG_IMAGEWIDTH, width);
TIFFSetField(m_tif, TIFFTAG_IMAGELENGTH, height);
TIFFSetField(m_tif, TIFFTAG_SAMPLESPERPIXEL, samplesperpixel);
TIFFSetField(m_tif, TIFFTAG_BITSPERSAMPLE, bitspersample);
TIFFSetField(m_tif, TIFFTAG_PHOTOMETRIC, photometric);
TIFFSetField(m_tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG); // single image plane
TIFFSetField(m_tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
uint32 rowsperstrip = TIFFDefaultStripSize(m_tif, (uint32) -1); //<REC> gives better compression
TIFFSetField(m_tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip);
// 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 <God(dot)bless(at)marihuana(dot)com>
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
if (GetCodecOption(CXIMAGE_FORMAT_TIF)) {
compression = (WORD)GetCodecOption(CXIMAGE_FORMAT_TIF);
} else {
switch (bitcount) {
case 1 :
compression = COMPRESSION_CCITTFAX4;
break;
case 4 :
case 8 :
compression = COMPRESSION_LZW;
break;
case 24 :
case 32 :
compression = COMPRESSION_JPEG;
break;
default :
compression = COMPRESSION_NONE;
break;
}
}
TIFFSetField(m_tif, TIFFTAG_COMPRESSION, compression);
switch (compression) {
case COMPRESSION_JPEG:
TIFFSetField(m_tif, TIFFTAG_JPEGQUALITY, info.nQuality);
TIFFSetField(m_tif, TIFFTAG_ROWSPERSTRIP, ((7+rowsperstrip)>>3)<<3);
break;
case COMPRESSION_LZW:
if (bitcount>=8) TIFFSetField(m_tif, TIFFTAG_PREDICTOR, 2);
break;
}
// 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;
if (TIFFWriteScanline(m_tif,bits, y, 0)==-1) return false;
}
}
#if CXIMAGE_SUPPORT_ALPHA
else { //8bpp + alpha layer
bits = (BYTE*)malloc(2*width);
if (!bits) return false;
for (y = 0; y < height; y++) {
for (x=0;x<width;x++){
bits[2*x]=GetPixelIndex(x,height - y - 1);
bits[2*x+1]=AlphaGet(x,height - y - 1);
}
if (TIFFWriteScanline(m_tif,bits, y, 0)==-1) {
free(bits);
return false;
}
}
free(bits);
}
#endif //CXIMAGE_SUPPORT_ALPHA
break;
}
case 24:
{
BYTE *buffer = (BYTE *)malloc(info.dwEffWidth);
if (!buffer) return false;
for (y = 0; y < height; y++) {
// get a pointer to the scanline
memcpy(buffer, info.pImage + (height - y - 1)*info.dwEffWidth, info.dwEffWidth);
// TIFFs store color data RGB instead of BGR
BYTE *pBuf = buffer;
for (x = 0; x < width; x++) {
BYTE tmp = pBuf[0];
pBuf[0] = pBuf[2];
pBuf[2] = tmp;
pBuf += 3;
}
// write the scanline to disc
if (TIFFWriteScanline(m_tif, buffer, y, 0)==-1){
free(buffer);
return false;
}
}
free(buffer);
break;
}
case 32 :
{
#if CXIMAGE_SUPPORT_ALPHA
BYTE *buffer = (BYTE *)malloc((info.dwEffWidth*4)/3);
if (!buffer) return false;
for (y = 0; y < height; y++) {
// get a pointer to the scanline
memcpy(buffer, info.pImage + (height - y - 1)*info.dwEffWidth, info.dwEffWidth);
// TIFFs store color data RGB instead of BGR
BYTE *pSrc = buffer + 3 * width;
BYTE *pDst = buffer + 4 * width;
for (x = 0; x < width; x++) {
pDst-=4;
pSrc-=3;
pDst[3] = AlphaGet(width-x-1,height-y-1);
pDst[2] = pSrc[0];
pDst[1] = pSrc[1];
pDst[0] = pSrc[2];
}
// write the scanline to disc
if (TIFFWriteScanline(m_tif, buffer, y, 0)==-1){
free(buffer);
return false;
}
}
free(buffer);
#endif //CXIMAGE_SUPPORT_ALPHA
break;
}
}
return true;
}