bool SaveThumb(CxImage &image, const char *file, const char *thumb, int maxWidth, int maxHeight, bool bNeedToConvert = true, bool autoRotate = true)
{
// ok, now resample the image down if necessary
int ret = ResampleKeepAspectArea(image, maxWidth * maxHeight);
if (ret < 0) return false;
if (ret) bNeedToConvert = true;
// if we don't have a png but have a < 24 bit image, then convert to 24bits
if ( image.GetNumColors())
{
if (!image.IncreaseBpp(24) || !image.IsValid())
{
printf("PICTURE::SaveThumb: Unable to convert to 24bpp: Error:%s\n", image.GetLastError());
return false;
}
bNeedToConvert = true;
}
if ( autoRotate && image.GetExifInfo()->Orientation > 1)
{
image.RotateExif(image.GetExifInfo()->Orientation);
bNeedToConvert = true;
}
#ifndef _LINUX
::DeleteFile(thumb);
#else
unlink(thumb);
#endif
// only resave the image if we have to (quality of the JPG saver isn't too hot!)
if (bNeedToConvert)
{
// May as well have decent quality thumbs
image.SetJpegQuality(90);
if (!image.Save(thumb, image.AlphaIsValid() ? CXIMAGE_FORMAT_PNG : CXIMAGE_FORMAT_JPG))
{
printf("PICTURE::SaveThumb: Unable to save image: %s Error:%s\n", thumb, image.GetLastError());
::DeleteFile(thumb);
return false;
}
}
else
{ // Don't need to convert the file - copy it instead
if (!CopyFile(file, thumb))
{
printf("PICTURE::SaveThumb: Unable to copy file %s\n", file);
::DeleteFile(thumb);
return false;
}
}
return true;
}
