glBlendEquationSeparate Function

GL_APICALL void GL_APIENTRY glBlendEquationSeparate(
     GLenum modeRGB,
     GLenum modeAlpha
);

	Name	Description
in	modeRGB	Blend function for RGB components.
in	modeAlpha	Blend function for alpha components.

No values are returned.

Sets the blend function(s). This sets separate functions for the RGB and alpha components.

You can specify GL_MIN or GL_MAX in addition to GL_FUNC_ADD, GL_FUNC_SUBTRACT, and GL_FUNC_REVERSE_SUBTRACT from the OpenGL ES 2.0 standard.

Given Cs as the product of the source color and source blend factor and Cd as the product of the destination color and destination blend factor, the color Cr for the blend result is calculated as follows for each setting.

GL_FUNC_ADD	Cr = Cs + Cd
GL_FUNC_SUBTRACT	Cr = Cs - Cd
GL_FUNC_REVERSE_SUBTRACT	Cr = Cd - Cs
GL_MIN	Cr = Cs < Cd ? Cs : Cd
GL_MAX	Cr = Cs > Cd ? Cs : Cd

This function generates the following errors.

GL_INVALID_OPERATION	This function was called without any command-list objects bound.
GL_INVALID_ENUM	The modeRGB or modeAlpha argument was set to an invalid value.

2010/01/07

Initial version.