Draws a padded RGB image in the drawable. The image is stored as one
pixel per 32-bit word. It is laid out as a red byte, a green byte, a
blue byte, and a padding byte.
Usage
gdkDrawRgb32Image(object, gc, x, y, width, height, dith, buf)
[raw] The pixel data, represented as padded 32-bit data.
Details
It's unlikely that this function will give significant performance
gains in practice. In my experience, the performance gain from having
pixels aligned to 32-bit boundaries is cancelled out by the increased
memory bandwidth.