Wt

In WPainter::Image::Image(const std::string& uri, const std::string& fileName), you can state a fileName to obtain image width and height. Only image/png and image/gif are supported. This code would add support for image/jpeg. Sorry it is not an actual patch, but should be pretty straightforward to implement:

First you have to make some seeks through the file. Here buf is the fread buffer (you call it header in your code) and f is the jpeg file.

        if(mimeType == "image/jpeg") {
                long pos=2;
                while (buf[2]==0xFF) {
                        if (buf[3]==0xC0 || buf[3]==0xC1 || buf[3]==0xC2 || buf[3]==0xC3 || buf[3]==0xC9 || buf[3]==0xCA || buf[3]==0xCB) break;
                        pos += 2+(buf[4]<<8)+buf[5];
                        if (pos+12>len) break;
                        fseek(f,pos,SEEK_SET);
                        fread(buf+2,1,12,f);
                }
        }

After this, where you compute height and width for gif and png formats, you should add

        else if(mimeType == "image/jpeg") {
                y = (buf[7]<<8) + buf[8];
                x = (buf[9]<<8) + buf[10];
        }

And that's it.

Regards