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glGetHistogramParameter.3gl
Langue: en
Version: 380415 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
glGetHistogramParameterfv, glGetHistogramParameteriv - get histogram parametersC 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(3G), glHistogram(3G)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre