nsvg__viewAlign
tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;