FreeBSD Manual Pages
GLHINT() GLHINT() NAME glHint - specify implementation-specific hints C SPECIFICATION void glHint( GLenum target, GLenum mode ) PARAMETERS target Specifies a symbolic constant indicating the behavior to be controlled. GL_FOG_HINT, GL_LINE_SMOOTH_HINT, GL_PERSPEC- TIVE_CORRECTION_HINT, GL_POINT_SMOOTH_HINT, and GL_POLY- GON_SMOOTH_HINT are accepted. mode Specifies a symbolic constant indicating the desired behavior. GL_FASTEST, GL_NICEST, and GL_DONT_CARE are accepted. DESCRIPTION Certain aspects of GL behavior, when there is room for interpretation, can be controlled with hints. A hint is specified with two arguments. target is a symbolic constant indicating the behavior to be controlled, and mode is another symbolic constant indicating the desired behavior. The initial value for each target is GL_DONT_CARE. mode can be one of the following: GL_FASTEST The most efficient option should be chosen. GL_NICEST The most correct, or highest quality, option should be chosen. GL_DONT_CARE No preference. Though the implementation aspects that can be hinted are well defined, the interpretation of the hints depends on the implementation. The hint aspects that can be specified with target, along with suggested semantics, are as follows: GL_FOG_HINT Indicates the accuracy of fog calculation. If per- pixel fog calculation is not efficiently supported by the GL implementation, hinting GL_DONT_CARE or GL_FASTEST can result in per-vertex calculation of fog effects. GL_LINE_SMOOTH_HINT Indicates the sampling quality of antialiased lines. If a larger filter function is applied, hinting GL_NICEST can result in more pixel frag- ments being generated during rasterization, GL_PERSPECTIVE_CORRECTION_HINT Indicates the quality of color and texture coordi- nate interpolation. If perspective-corrected para- meter interpolation is not efficiently supported by the GL implementation, hinting GL_DONT_CARE or GL_FASTEST can result in simple linear interpola- tion of colors and/or texture coordinates. GL_POINT_SMOOTH_HINT Indicates the sampling quality of antialiased points. If a larger filter function is applied, hinting GL_NICEST can result in more pixel frag- ments being generated during rasterization, GL_POLYGON_SMOOTH_HINT Indicates the sampling quality of antialiased poly- gons. Hinting GL_NICEST can result in more pixel fragments being generated during rasterization, if a larger filter function is applied. NOTES The interpretation of hints depends on the implementation. Some imple- mentations ignore glHint settings. ERRORS GL_INVALID_ENUM is generated if either target or mode is not an ac- cepted value. GL_INVALID_OPERATION is generated if glHint is executed between the ex- ecution of glBegin and the corresponding execution of glEnd. GLHINT()
NAME | C SPECIFICATION | PARAMETERS | DESCRIPTION | NOTES | ERRORS
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=glHint&sektion=3&manpath=FreeBSD+Ports+15.0.quarterly>