case PNG_COLOR_TYPE_PALETTE: data.fmt = COLOR_INDEX; break;
case PNG_COLOR_TYPE_GRAY: data.fmt = LUMINANCE; break;
case PNG_COLOR_TYPE_GRAY_ALPHA: data.fmt = LUMINANCE_ALPHA; break;
case PNG_COLOR_TYPE_PALETTE: data.fmt = COLOR_INDEX; break;
case PNG_COLOR_TYPE_GRAY: data.fmt = LUMINANCE; break;
case PNG_COLOR_TYPE_GRAY_ALPHA: data.fmt = LUMINANCE_ALPHA; break;
case PNG_COLOR_TYPE_RGB_ALPHA: data.fmt = RGBA; break;
default: throw unsupported_image_format("unknown color type");
}
case PNG_COLOR_TYPE_RGB_ALPHA: data.fmt = RGBA; break;
default: throw unsupported_image_format("unknown color type");
}
data.data = new char[data.stride*data.height];
for(unsigned y=0; y<data.height; ++y)
png_read_row(priv->png, reinterpret_cast<png_byte *>(data.data+data.stride*(data.height-1-y)), 0);
data.data = new char[data.stride*data.height];
for(unsigned y=0; y<data.height; ++y)
png_read_row(priv->png, reinterpret_cast<png_byte *>(data.data+data.stride*(data.height-1-y)), 0);