void ProgressivePNGImageFileReader::open(const char* filename)
{
assert(filename);
assert(!is_open());
PNGImageFileReader reader;
auto_ptr<Image> image(reader.read(filename, &impl->m_attributes));
impl->m_image.reset(
new Image(
*image.get(),
impl->m_tile_width,
impl->m_tile_height,
image->properties().m_pixel_format));
}
Image* GenericImageFileReader::read(
const char* filename,
ImageAttributes* image_attributes)
{
const filesystem::path filepath(filename);
const string extension = lower_case(filepath.extension().string());
if (extension == ".exr")
{
EXRImageFileReader reader;
return reader.read(filename, image_attributes);
}
else if (extension == ".png")
{
PNGImageFileReader reader;
return reader.read(filename, image_attributes);
}
else
{
throw ExceptionUnsupportedFileFormat(filename);
return 0;
}
}