glGetHistogramParameterEXT(3G) OpenGL Reference
NAME
glGetHistogramParameterfvEXT, glGetHistogramParameterivEXT - get
histogram parameters
C SPECIFICATION
void glGetHistogramParameterfvEXT( GLenum target,
GLenum pname,
GLfloat *params )
void glGetHistogramParameterivEXT( GLenum target,
GLenum pname,
GLint *params )
PARAMETERS
target Must be one of GL_HISTOGRAM_EXT or GL_PROXY_HISTOGRAM_EXT.
pname The name of the parameter to be retrieved. Must be one of
GL_HISTOGRAM_WIDTH_EXT, GL_HISTOGRAM_FORMAT_EXT,
GL_HISTOGRAM_RED_SIZE_EXT, GL_HISTOGRAM_GREEN_SIZE_EXT,
GL_HISTOGRAM_BLUE_SIZE_EXT, GL_HISTOGRAM_ALPHA_SIZE_EXT,
GL_HISTOGRAM_LUMINANCE_SIZE_EXT, or GL_HISTOGRAM_SINK_EXT.
params Pointer to storage for the returned values.
DESCRIPTION
glGetHistogramParameterEXT is used to query parameter values for the
current histogram or for a proxy. For a detailed description of the
parameters, see glHistogramEXT.
ERRORS
GL_INVALID_ENUM is generated if target is not one of the allowable
values.
GL_INVALID_ENUM is generated if pname is not one of the allowable values.
GL_INVALID_OPERATION is generated if glGetHistogramParameterEXT is
executed between the execution of glBegin and the corresponding execution
of glEnd.
SEE ALSO
glHistogramEXT
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