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glGetConvolutionParameter.3gl
Langue: en
Version: 380785 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
glGetConvolutionParameterfv, glGetConvolutionParameteriv - get convolution parametersC SPECIFICATION
void glGetConvolutionParameterfv( GLenum target,GLenum pname, GLfloat *params )void glGetConvolutionParameteriv( GLenum target,
GLenum pname, GLint *params )
PARAMETERS
- target
- The filter whose parameters are to be retrieved. Must be one of GL_CONVOLUTION_1D, GL_CONVOLUTION_2D, or GL_SEPARABLE_2D.
- pname
- The parameter to be retrieved. Must be one of GL_CONVOLUTION_BORDER_MODE, GL_CONVOLUTION_BORDER_COLOR, GL_CONVOLUTION_FILTER_SCALE, GL_CONVOLUTION_FILTER_BIAS, GL_CONVOLUTION_FORMAT, GL_CONVOLUTION_WIDTH, GL_CONVOLUTION_HEIGHT, GL_MAX_CONVOLUTION_WIDTH, or GL_MAX_CONVOLUTION_HEIGHT.
- params
- Pointer to storage for the parameters to be retrieved.
DESCRIPTION
glGetConvolutionParameter retrieves convolution parameters. target determines which convolution filter is queried. pname determines which parameter is returned:- GL_CONVOLUTION_BORDER_MODE
- The convolution border mode. See glConvolutionParameter for a list of border modes.
- GL_CONVOLUTION_BORDER_COLOR
- The current convolution border color. params must be a pointer to an array of four elements, which will receive the red, green, blue, and alpha border colors.
- GL_CONVOLUTION_FILTER_SCALE
- The current filter scale factors. params must be a pointer to an array of four elements, which will receive the red, green, blue, and alpha filter scale factors in that order.
- GL_CONVOLUTION_FILTER_BIAS
- The current filter bias factors. params must be a pointer to an array of four elements, which will receive the red, green, blue, and alpha filter bias terms in that order.
- GL_CONVOLUTION_FORMAT
- The current internal . See glConvolutionFilter1D, glConvolutionFilter2D, and glSeparableFilter2D for lists of allowable formats.
- GL_CONVOLUTION_WIDTH
- The current filter image width.
- GL_CONVOLUTION_HEIGHT
- The current filter image height.
- GL_MAX_CONVOLUTION_WIDTH
- The maximum acceptable filter image width.
- GL_MAX_CONVOLUTION_HEIGHT
- The maximum acceptable filter image height.
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_ENUM is generated if target is GL_CONVOLUTION_1D and pname is GL_CONVOLUTION_HEIGHT or GL_MAX_CONVOLUTION_HEIGHT. GL_INVALID_OPERATION is generated if glGetConvolutionParameter is executed between the execution of glBegin and the corresponding execution of glEnd.SEE ALSO
glGetConvolutionFilter(3G), glGetSeparableFilter2D(3G), glConvolutionParameter(3G)Contenus ©2006-2024 Benjamin Poulain
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