glBlendColorEXT

glBlendColorEXT: set the blend color.

C Specification

void glBlendColorEXT(
    GLclampf	 red,
    GLclampf	 green,
    GLclampf	 blue,
    GLclampf	 alpha)

Parameters

red, green, blue, alpha: Specify the components of GL_BLEND_COLOR_EXT.

The GL_BLEND_COLOR_EXT may be used to calculate the source and destination blending factors. See glBlendFunc for a complete description of the blending operations. Initially the GL_BLEND_COLOR_EXT is set to (0, 0, 0, 0).

Notes

glBlendColorEXT is part of the EXT_blend_color extension, not part of the core GL command set. If GL_EXT_blend_color is included in the string returned by glGetString, when called with argument GL_EXTENSIONS, extension EXT_blend_color is supported by the connection.

Errors

GL_INVALID_OPERATION is generated if glBlendColorEXT is executed between the execution of glBegin and the corresponding execution of glEnd.

Associated Gets

glGet with an argument of GL_BLEND_COLOR_EXT.