Feature Request: Composite Blend Modes

[wezside]

I had a look and this appears to be available in libvips (issue #657) but not yet in sharp. It is one of the features I feel sharp is lacking that would make it very useful personally.

 VImage VImage::composite( VImage other, VipsBlendMode mode, VOption *options );

Without having too much knowledge on the library I'd imagine a pseudo method as below could work?

VImage Blend(VImage image, VImage overlayImage, VipsBlendMode mode) 
{
	// check for same width + height
	// check for alpha
	return image.composite(overlayImage, mode, VImage::option());
}

[lovell]

Hello, did you see #728?

[wezside]

I did but totally forgot about it. Will follow along the other discussion. I do think a single/simple method could be beneficial, even if the multiple overlay references this single/simple method. Feel free to close this.

[lovell]

Let's track this at #728, thanks.