Anders Riggelsen

Visual glBlendFunc + glBlendEquation Tool

Source: (foreground)

Destination: (background)

Blend equation:

result = ...

Display:

Use premultiplied alpha

Image presets
Image URLs
Blending color

Foreground:

Background:

(display image size is 400x400)

Hue:

Alpha value: 1.0

Use this tool to quickly visualize how the different blending modes work in OpenGL.

Graphics from www.interfacelift.com:

Splash by Richard Mohler
Bisti Badlands by Ben DiAnna
Lazy Days II by boss019
Flamingos by Jestrella
Treetops - Michaux State Forest by Se7en
The Road To Bonneville by Chris F
Clouds Over Water by DerekProspero

Thanks to Alex Huang for finding a bug in in the math for GL_FUNC_REVERSE_SUBTRACT.