1GLHINT(3G)                      [FIXME: manual]                     GLHINT(3G)
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NAME

6       glHint - specify implementation-specific hints
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C SPECIFICATION

9       void glHint(GLenum target, GLenum mode);
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PARAMETERS

12       target
13           Specifies a symbolic constant indicating the behavior to be
14           controlled.  GL_LINE_SMOOTH_HINT, GL_POLYGON_SMOOTH_HINT,
15           GL_TEXTURE_COMPRESSION_HINT, and GL_FRAGMENT_SHADER_DERIVATIVE_HINT
16           are accepted.
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18       mode
19           Specifies a symbolic constant indicating the desired behavior.
20           GL_FASTEST, GL_NICEST, and GL_DONT_CARE are accepted.
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DESCRIPTION

23       Certain aspects of GL behavior, when there is room for interpretation,
24       can be controlled with hints. A hint is specified with two arguments.
25       target is a symbolic constant indicating the behavior to be controlled,
26       and mode is another symbolic constant indicating the desired behavior.
27       The initial value for each target is GL_DONT_CARE.  mode can be one of
28       the following:
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30       GL_FASTEST
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32           The most efficient option should be chosen.
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34       GL_NICEST
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36           The most correct, or highest quality, option should be chosen.
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38       GL_DONT_CARE
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40           No preference.
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42       Though the implementation aspects that can be hinted are well defined,
43       the interpretation of the hints depends on the implementation. The hint
44       aspects that can be specified with target, along with suggested
45       semantics, are as follows:
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47       GL_FRAGMENT_SHADER_DERIVATIVE_HINT
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49           Indicates the accuracy of the derivative calculation for the GL
50           shading language fragment processing built-in functions: dFdx,
51           dFdy, and fwidth.
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53       GL_LINE_SMOOTH_HINT
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55           Indicates the sampling quality of antialiased lines. If a larger
56           filter function is applied, hinting GL_NICEST can result in more
57           pixel fragments being generated during rasterization.
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59       GL_POLYGON_SMOOTH_HINT
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61           Indicates the sampling quality of antialiased polygons. Hinting
62           GL_NICEST can result in more pixel fragments being generated during
63           rasterization, if a larger filter function is applied.
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65       GL_TEXTURE_COMPRESSION_HINT
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67           Indicates the quality and performance of the compressing texture
68           images. Hinting GL_FASTEST indicates that texture images should be
69           compressed as quickly as possible, while GL_NICEST indicates that
70           texture images should be compressed with as little image quality
71           loss as possible.  GL_NICEST should be selected if the texture is
72           to be retrieved by glGetCompressedTexImage() for reuse.
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NOTES

75       The interpretation of hints depends on the implementation. Some
76       implementations ignore glHint settings.
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ERRORS

79       GL_INVALID_ENUM is generated if either target or mode is not an
80       accepted value.
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VERSION SUPPORT

83       ┌─────────┬───────────────────────────────────────────────────────────────────────┐
84       │         │                OpenGL Version                                         │
85       ├─────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
86       │Function │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
87       │/        │     │     │     │     │     │     │     │     │     │     │     │     │
88       │Feature  │     │     │     │     │     │     │     │     │     │     │     │     │
89       │Name     │     │     │     │     │     │     │     │     │     │     │     │     │
90       ├─────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
91       │glHint   │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
92       └─────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘
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SEE ALSO

96       Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014
97       Khronos Group. This document is licensed under the SGI Free Software B
98       License. For details, see http://oss.sgi.com/projects/FreeB/.
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101       Copyright © 1991-2006 Silicon Graphics, Inc.
102       Copyright © 2010-2014 Khronos Group
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106[FIXME: source]                   07/13/2018                        GLHINT(3G)



        

    


            
        

        

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