bool
Invert::do_invert( const Raster &src, Raster &dest)
{
try {
if (&src != &dest) {
dest.redimension( src.width(), src.height(), src.depth(), src.interp());
}
size_t words = src.data_words();
Raster_Word * s = src.raster_word();
Raster_Word * d = src.raster_word();
for (size_t i = 0; i < words; ++i) {
d[ i] = ~s[ i];
}
return true;
}
catch (...) {
return false;
}
}
bool
TIFF_Reader::imp_load_next( Raster &raster)
{
try {
uint32 width;
uint32 height;
uint16 bits_per_sample;
uint16 samples_per_pixel;
uint16 photometric;
Colormetric cm;
ColorInterp interp;
TIFFGetField( m_tiff, TIFFTAG_IMAGEWIDTH , &width );
TIFFGetField( m_tiff, TIFFTAG_IMAGELENGTH , &height );
TIFFGetField( m_tiff, TIFFTAG_BITSPERSAMPLE , &bits_per_sample );
TIFFGetField( m_tiff, TIFFTAG_SAMPLESPERPIXEL, &samples_per_pixel);
TIFFGetField( m_tiff, TIFFTAG_PHOTOMETRIC , &photometric );
cm = colormetric_null;
switch (bits_per_sample) {
case 1:
cm = colormetric_1;
switch (photometric) {
case 0: interp = colorinterp_low_is_white; break;
case 1: interp = colorinterp_low_is_black; break;
}
break;
case 4:
cm = colormetric_4;
switch (photometric) {
case 0: interp = colorinterp_low_is_white; break;
case 1: interp = colorinterp_low_is_black; break;
case 3: interp = colorinterp_paletted ; break;
}
break;
case 8:
switch (photometric) {
case 0:
cm = colormetric_8;
interp = colorinterp_low_is_white;
break;
case 1:
cm = colormetric_8;
interp = colorinterp_low_is_black;
break;
case 2:
cm = colormetric_24;
break;
case 3:
cm = colormetric_8;
interp = colorinterp_paletted;
break;
}
break;
case 16:
cm = colormetric_16;
break;
}
if (colormetric_null == cm) {
return false;
}
raster.redimension( width, height, cm, interp);
uint32 offset = 0;
uint32 row = 0;
uint32 row_size = raster.row_size();
Raster_Data data = raster.raster();
while ((row < height) &&
(TIFFReadScanline( m_tiff, &data[ offset], row, 0) >= 0)) {
offset += row_size;
++row;
}
return true;
}
catch (...) {
return false;
}
}
