Интерактивная система просмотра системных руководств (man-ов)
glBlendColor (3)
>> glBlendColor (3) ( Разные man: Библиотечные вызовы )
NAME
glBlendColor
- set the blend color
C SPECIFICATION
void glBlendColor(
GLclampf red,
GLclampf green,
GLclampf blue,
GLclampf alpha )
delim $$
PARAMETERS
red, green, blue, alpha
specify the components of GL_BLEND_COLOR
DESCRIPTION
The GL_BLEND_COLOR may be used to calculate the source and destination
blending factors. The color components are clamped to the range [0, 1]
before being stored. See glBlendFunc for a complete description of the
blending operations.
Initially the GL_BLEND_COLOR is set to (0, 0, 0, 0).
NOTES
glBlendColor is part of the GL_ARB_imaging subset. glBlendColor is present only
if GL_ARB_imaging is returned when glGetString is called with
GL_EXTENSIONS as its argument.
ERRORS
GL_INVALID_OPERATION is generated if glBlendColor is executed
between the execution of glBegin and the corresponding
execution of glEnd.
