TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &w );
TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &h );
+ uint16 extraSamples;
+ uint16* samplesInfo;
+ TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES,
+ &extraSamples, &samplesInfo);
+ const bool hasAlpha = (extraSamples == 1 &&
+ (samplesInfo[0] == EXTRASAMPLE_ASSOCALPHA ||
+ samplesInfo[0] == EXTRASAMPLE_UNASSALPHA));
+
npixels = w * h;
raster = (uint32*) _TIFFmalloc( npixels * sizeof(uint32) );
return false;
}
+ if ( hasAlpha )
+ image->SetAlpha();
+
if (!TIFFReadRGBAImage( tif, w, h, raster, 0 ))
{
if (verbose)
return false;
}
- bool hasmask = false;
-
unsigned char *ptr = image->GetData();
ptr += w*3*(h-1);
+
+ unsigned char *alpha = hasAlpha ? image->GetAlpha() : NULL;
+ if ( hasAlpha )
+ alpha += w*(h-1);
+
uint32 pos = 0;
for (uint32 i = 0; i < h; i++)
{
for (uint32 j = 0; j < w; j++)
{
- unsigned char alpha = (unsigned char)TIFFGetA(raster[pos]);
- if (alpha < 127)
- {
- hasmask = true;
- ptr[0] = image->GetMaskRed();
- ptr++;
- ptr[0] = image->GetMaskGreen();
- ptr++;
- ptr[0] = image->GetMaskBlue();
- ptr++;
- }
- else
- {
- ptr[0] = (unsigned char)TIFFGetR(raster[pos]);
- ptr++;
- ptr[0] = (unsigned char)TIFFGetG(raster[pos]);
- ptr++;
- ptr[0] = (unsigned char)TIFFGetB(raster[pos]);
- ptr++;
- }
+ *(ptr++) = (unsigned char)TIFFGetR(raster[pos]);
+ *(ptr++) = (unsigned char)TIFFGetG(raster[pos]);
+ *(ptr++) = (unsigned char)TIFFGetB(raster[pos]);
+ if ( hasAlpha )
+ *(alpha++) = (unsigned char)TIFFGetA(raster[pos]);
+
pos++;
}
- ptr -= 2*w*3; // subtract line we just added plus one line
+
+ // subtract line we just added plus one line:
+ ptr -= 2*w*3;
+ if ( hasAlpha )
+ alpha -= 2*w;
}
_TIFFfree( raster );
TIFFClose( tif );
- image->SetMask( hasmask );
-
return true;
}