GRESULT gsys::LoadTIFF(gsys::gfile *file,bitmap & clarr,int Options,int* pOptionsQuery)
{
TIFF* tif = TIFFClientOpen("","r",reinterpret_cast<thandle_t>(file),
_tiff_read,
_tiff_read,
_tiff_seek,
_tiff_close,
_tiff_size,
_tiff_map,
_tiff_unmap);
if(!tif) return GERR_INVALID_DATA;
uint32 w, h;
size_t npixels;
uint32* raster;
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &w);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &h);
npixels = w * h;
raster = (uint32*) _TIFFmalloc((tsize_t)(npixels * sizeof (uint32)));
if (raster != NULL)
{
if (TIFFReadRGBAImage(tif, w, h, raster, 0))
{
//gsys::array2d<gsys::dwcolor> clarr(w,h);
clarr.init(w,h);
for(uint i=0;i<npixels;i++)
{
dwcolor cl;
uint32 ucl = raster[i];
clarr(i) = dwcolor( (gbyte)TIFFGetR(ucl),
(gbyte)TIFFGetG(ucl),
(gbyte)TIFFGetB(ucl),
(gbyte)TIFFGetA(ucl));
}
}
_TIFFfree(raster);
}
TIFFClose(tif);
GTransformImage(clarr,ImagePremultipliedAlpha,Options,pOptionsQuery);
return G_OK;
}
