glBlendColor(3gl)

1GLBLENDCOLOR(3G)                                              GLBLENDCOLOR(3G)
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NAME

6       glBlendColor - set the blend color
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C SPECIFICATION

10       void glBlendColor( GLclampf red,
11                          GLclampf green,
12                          GLclampf blue,
13                          GLclampf alpha )
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PARAMETERS

17       red, green, blue, alpha
18                             specify the components of GL_BLEND_COLOR
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DESCRIPTION

21       The  GL_BLEND_COLOR may be used to calculate the source and destination
22       blending factors. The color components are clamped to the range  [0, 1]
23       before  being stored. See glBlendFunc for a complete description of the
24       blending operations.  Initially the GL_BLEND_COLOR is set to (0, 0,  0,
25       0).
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NOTES

28       glBlendColor  is  part  of  the  GL_ARB_imaging subset. glBlendColor is
29       present only if GL_ARB_imaging is returned when glGetString  is  called
30       with GL_EXTENSIONS as its argument.
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ERRORS

33       GL_INVALID_OPERATION  is  generated if glBlendColor is executed between
34       the execution of glBegin and the corresponding execution of glEnd.
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ASSOCIATED GETS

37       glGet with an argument of GL_BLEND_COLOR
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