glgethistogramparameter(3g) [osx man page]
GLGETHISTOGRAMPARAMETER(3G) GLGETHISTOGRAMPARAMETER(3G) NAME
glGetHistogramParameterfv, glGetHistogramParameteriv - get histogram parameters C SPECIFICATION
void glGetHistogramParameterfv( GLenum target, GLenum pname, GLfloat *params ) void glGetHistogramParameteriv( GLenum target, GLenum pname, GLint *params ) PARAMETERS
target Must be one of GL_HISTOGRAM or GL_PROXY_HISTOGRAM. pname The name of the parameter to be retrieved. Must be one of GL_HISTOGRAM_WIDTH, GL_HISTOGRAM_FORMAT, GL_HISTOGRAM_RED_SIZE, GL_HISTOGRAM_GREEN_SIZE, GL_HISTOGRAM_BLUE_SIZE, GL_HISTOGRAM_ALPHA_SIZE, GL_HISTOGRAM_LUMINANCE_SIZE, or GL_HISTOGRAM_SINK. params Pointer to storage for the returned values. DESCRIPTION
glGetHistogramParameter is used to query parameter values for the current histogram or for a proxy. The histogram state information may be queried by calling glGetHistogramParameter with a target of GL_HISTOGRAM (to obtain information for the current histogram table) or GL_PROXY_HISTOGRAM (to obtain information from the most recent proxy request) and one of the following values for the pname argument: Parameter Description GL_HISTOGRAM_WIDTH Histogram table width GL_HISTOGRAM_FORMAT Internal GL_HISTOGRAM_RED_SIZE Red component counter size, in bits GL_HISTOGRAM_GREEN_SIZE Green component counter size, in bits Parameter Description GL_HISTOGRAM_BLUE_SIZE Blue component counter size, in bits GL_HISTOGRAM_ALPHA_SIZE Alpha component counter size, in bits GL_HISTOGRAM_LUMINANCE_SIZE Luminance component counter size, in bits GL_HISTOGRAM_SINK Value of the sink parameter NOTES
glGetHistogramParameter is present only if GL_ARB_imaging is returned when glGetString is called with an argument of GL_EXTENSIONS. 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 glGetHistogramParameter is executed between the execution of glBegin and the corresponding execution of glEnd. SEE ALSO
glGetHistogram, glHistogram GLGETHISTOGRAMPARAMETER(3G)
Check Out this Related Man Page
GLGETHISTOGRAMPARAME(3G) OpenGL Manual GLGETHISTOGRAMPARAME(3G) NAME
glGetHistogramParameter - get histogram parameters C SPECIFICATION
void glGetHistogramParameterfv(GLenum target, GLenum pname, GLfloat * params); void glGetHistogramParameteriv(GLenum target, GLenum pname, GLint * params); PARAMETERS
target Must be one of GL_HISTOGRAM or GL_PROXY_HISTOGRAM. pname The name of the parameter to be retrieved. Must be one of GL_HISTOGRAM_WIDTH, GL_HISTOGRAM_FORMAT, GL_HISTOGRAM_RED_SIZE, GL_HISTOGRAM_GREEN_SIZE, GL_HISTOGRAM_BLUE_SIZE, GL_HISTOGRAM_ALPHA_SIZE, GL_HISTOGRAM_LUMINANCE_SIZE, or GL_HISTOGRAM_SINK. params Pointer to storage for the returned values. DESCRIPTION
glGetHistogramParameter is used to query parameter values for the current histogram or for a proxy. The histogram state information may be queried by calling glGetHistogramParameter with a target of GL_HISTOGRAM (to obtain information for the current histogram table) or GL_PROXY_HISTOGRAM (to obtain information from the most recent proxy request) and one of the following values for the pname argument: +----------------------------------+-------------------------------------------+ | | | | Parameter | Description | | | | +----------------------------------+-------------------------------------------+ |GL_HISTOGRAM_WIDTH | Histogram table width | +----------------------------------+-------------------------------------------+ |GL_HISTOGRAM_FORMAT | Internal format | +----------------------------------+-------------------------------------------+ |GL_HISTOGRAM_RED_SIZE | Red component counter size, in bits | +----------------------------------+-------------------------------------------+ |GL_HISTOGRAM_GREEN_SIZE | Green component counter size, in bits | +----------------------------------+-------------------------------------------+ |GL_HISTOGRAM_BLUE_SIZE | Blue component counter size, in bits | +----------------------------------+-------------------------------------------+ |GL_HISTOGRAM_ALPHA_SIZE | Alpha component counter size, in bits | +----------------------------------+-------------------------------------------+ |GL_HISTOGRAM_LUMINANCE_SIZE | Luminance component counter size, in bits | +----------------------------------+-------------------------------------------+ |GL_HISTOGRAM_SINK | Value of the sink parameter | +----------------------------------+-------------------------------------------+ NOTES
glGetHistogramParameter is present only if ARB_imaging is returned when glGetString() is called with an argument of GL_EXTENSIONS. 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 glGetHistogramParameter is executed between the execution of glBegin() and the corresponding execution of glEnd(). SEE ALSO
glGetHistogram(), glHistogram() COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/. AUTHORS
opengl.org opengl.org 06/10/2014 GLGETHISTOGRAMPARAME(3G)