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tiff.c    257 lines (209 with data), 6.5 kB

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/* Panorama_Tools - Generate, Edit and Convert Panoramic Images
Copyright (C) 1998,1999 - Helmut Dersch der@fh-furtwangen.de
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/*------------------------------------------------------------*/
// Functions to read tiff format
#include "filter.h"
#include "tiffio.h"
int readplanarTIFF(Image *im, TIFF* tif);
void RGBAtoARGB(UCHAR* buf, int width, int bitsPerPixel);
void ARGBtoRGBA(UCHAR* buf, int width, int bitsPerPixel);
int readtif(Image *im, TIFF* tif);
// image is allocated, but not image data
int readtif(Image *im, TIFF* tif){
short BitsPerSample, tPhotoMetric, config;
long w, h;
unsigned long **hdl_raster;
if(tif == NULL || im == NULL) return -1;
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &w);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &h);
TIFFGetField(tif, TIFFTAG_BITSPERSAMPLE, &BitsPerSample);
TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &tPhotoMetric);
TIFFGetField(tif, TIFFTAG_PLANARCONFIG, &config);
SetImageDefaults( im );
im->width = w;
im->height = h;
im->bitsPerPixel = 32 * BitsPerSample/8;
im->bytesPerLine = im->width * im->bitsPerPixel/8;
im->dataSize = im->bytesPerLine * im->height;
hdl_raster = (unsigned long**) mymalloc(im->dataSize);
if( hdl_raster == NULL){
PrintError("Not enough memory");
return -1;
}
im->data = (UCHAR**)hdl_raster;
if( tPhotoMetric == PHOTOMETRIC_RGB && config == PLANARCONFIG_CONTIG){
return readplanarTIFF(im, tif);
}
if (TIFFReadRGBAImage(tif, w, h, (unsigned long*)*(im->data), 0)) {
// Convert agbr to argb; flip image vertically
unsigned char *cline, *ct, *cb;
int h2 = im->height/2, y;
cline = (unsigned char*)malloc(im->bytesPerLine);
if(cline==NULL){
PrintError("Not enough memory");
return -1;
}
ct = *im->data;
cb = *im->data + (im->height-1)*im->bytesPerLine;
for(y=0; y<h2; y++,ct+=im->bytesPerLine,cb-=im->bytesPerLine){
RGBAtoARGB(ct, im->width, im->bitsPerPixel);
RGBAtoARGB(cb, im->width, im->bitsPerPixel);
memcpy(cline,ct,im->bytesPerLine);
memcpy(ct,cb,im->bytesPerLine);
memcpy(cb,cline,im->bytesPerLine);
}
if(im->height != 2*h2){ // odd number of scanlines
RGBAtoARGB(*im->data+y*im->bytesPerLine, im->width, im->bitsPerPixel);
}
if(cline) free(cline);
}else{
PrintError("Could not read tiff-data");
return -1;
}
return 0;
}
int readTIFF(Image *im, fullPath *sfile){
char filename[512];
TIFF* tif;
int result = 0;
if(FullPathtoString( sfile, filename )){
PrintError("Could not get filename");
return -1;
}
tif = TIFFOpen(filename, "r");
if ( !tif){
PrintError("Could not open tiff-file");
return -1;
}
result = readtif(im, tif);
TIFFClose(tif);
return result;
}
int readplanarTIFF(Image *im, TIFF* tif){
UCHAR* buf;
int y;
short SamplesPerPixel;
TIFFGetField(tif, TIFFTAG_SAMPLESPERPIXEL, &SamplesPerPixel);
if( SamplesPerPixel > 4 ) return -1;
if( SamplesPerPixel == 3 ){
im->bitsPerPixel = im->bitsPerPixel * 3 / 4;
im->bytesPerLine = im->bytesPerLine * 3 / 4;
}
buf = (UCHAR*)malloc(TIFFScanlineSize(tif));
if( buf == NULL ){
PrintError("Not enough memory");
return -1;
}
for (y = 0; y < im->height; y++){
TIFFReadScanline(tif, buf, y, 0);
RGBAtoARGB( buf, im->width, im->bitsPerPixel);
memcpy( *(im->data) + y*im->bytesPerLine, buf, im->bytesPerLine );
}
free( buf );
ThreeToFourBPP( im );
return 0;
}
int writeTIFF(Image *im, fullPath *sfile){
char string[512];
TIFF *tif;
UCHAR* buf;
int bufsize,y;
if(FullPathtoString( sfile, string )){
PrintError("Could not get filename");
return -1;
}
tif = TIFFOpen(string, "w");
if( !tif ){
PrintError("Could not create TIFF-file");
return -1;
}
TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, im->width);
TIFFSetField(tif, TIFFTAG_IMAGELENGTH, im->height);
TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, im->bitsPerPixel < 48 ? 8 : 16 );
TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, im->bitsPerPixel == 24 || im->bitsPerPixel == 48 ? 3 : 4);
TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_PACKBITS );
TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT );
TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, im->height );
bufsize = TIFFScanlineSize(tif);
if(bufsize < im->bytesPerLine) bufsize = im->bytesPerLine;
buf = (UCHAR*)malloc(bufsize);
if( buf == NULL ){
PrintError("Not enough memory");
return -1;
}
for (y = 0; y < im->height; y++){
memcpy( buf, *(im->data) + y*im->bytesPerLine, im->bytesPerLine );
ARGBtoRGBA( buf, im->width, im->bitsPerPixel);
TIFFWriteScanline(tif, buf, y, 1);
}
free( buf );
TIFFClose( tif );
return 0;
}
void RGBAtoARGB(UCHAR* buf, int width, int bitsPerPixel){
int x;
switch(bitsPerPixel){
case 32: {
UCHAR pix;
for(x=0; x<width; x++,buf+=4){
pix = buf[3];
buf[3] = buf[2];
buf[2] = buf[1];
buf[1] = buf[0];
buf[0] = pix;
}
}
break;
case 64: {
USHORT *bufs=(USHORT*)buf, pix;
for(x=0; x<width; x++,bufs+=4){
pix = bufs[3];
bufs[3] = bufs[2];
bufs[2] = bufs[1];
bufs[1] = bufs[0];
bufs[0] = pix;
}
}
break;
}
}
void ARGBtoRGBA(UCHAR* buf, int width, int bitsPerPixel){
int x;
switch(bitsPerPixel){
case 32:{
UCHAR pix;
for(x=0; x<width; x++, buf+=4){
pix = buf[0];
buf[0] = buf[1];
buf[1] = buf[2];
buf[2] = buf[3];
buf[3] = pix;
}
}
break;
case 64:{
USHORT *bufs = (USHORT*)buf, pix;
for(x=0; x<width; x++, bufs+=4){
pix = bufs[0];
bufs[0] = bufs[1];
bufs[1] = bufs[2];
bufs[2] = bufs[3];
bufs[3] = pix;
}
}
break;
}
}