why does webgl blending not support COLOR_LOGIC_OP mode?

Question

I am new to WebGL. I create a FBO and render a texture on it. Now another texture is suppose to be rendered in the same coordinate by blending the fragments' R,G,B and A values in COLOR_LOGIC_OP mode. Then I checkout the WebGL Specification, and could not find any information about the blending mode. Has the blending mode not been implemented yet?

Answer 1

The simple answer is because WebGL is based on OpenGL ES 2.0 and OpenGL ES 2.0 doesn't support glLogicOp .

It's also not in OpenGL ES 3.0 either which the next version of WebGL will be based on so it will most likely not appear in WebGL for the forceable future.