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glBlendColorEXT
Chapter 2
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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.
Description
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.
See Also
glBlendFunc,
glGetString
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