bindbc.opengl.bind.arb.core

1 
2 //          Copyright 2018 - 2021 Michael D. Parker
3 // Distributed under the Boost Software License, Version 1.0.
4 //    (See accompanying file LICENSE_1_0.txt or copy at
5 //          http://www.boost.org/LICENSE_1_0.txt)
6 
7 module bindbc.opengl.bind.arb.core_46;
8 
9 import bindbc.loader;
10 import bindbc.opengl.config,
11        bindbc.opengl.context;
12 import bindbc.opengl.bind.types;
13 
14 static if(glSupport >= GLSupport.gl46) {
15     enum has46 = true;
16 }
17 else enum has46 = false;
18 
19 // ARB_polygon_offset_clamp
20 version(GL_ARB) enum useARBPolygonOffsetClamp = true;
21 else version(GL_ARB_polygon_offset_clamp) enum useARBPolygonOffsetClamp = true;
22 else enum useARBPolygonOffsetClamp = has46;
23 
24 static if(useARBPolygonOffsetClamp) {
25     private bool _hasARBPolygonOffsetClamp;
26     @nogc nothrow bool hasARBPolygonOffsetClamp() { return _hasARBPolygonOffsetClamp; }
27 
28     enum uint GL_POLYGON_OFFSET_CLAMP = 0x8E1B;
29 
30     extern(System) @nogc nothrow alias pglPolygonOffsetClamp = void function( GLfloat,GLfloat,GLfloat );
31     __gshared pglPolygonOffsetClamp glPolygonOffsetClamp;
32 
33     private @nogc nothrow
34     bool loadARBPolygonOffsetClamp(SharedLib lib, GLSupport contextVersion)
35     {
36         lib.bindGLSymbol(cast(void**)&glPolygonOffsetClamp, "glPolygonOffsetClamp");
37         return resetErrorCountGL;
38     }
39 }
40 else enum hasARBPolygonOffsetClamp = false;
41 
42 // ARB_texture_filter_anisotropic
43 version(GL_ARB) enum useARBTextureFilterAnisotropic = true;
44 else version(GL_ARB_texture_filter_anisotropic) enum useARBTextureFilterAnisotropic = true;
45 else enum useARBTextureFilterAnisotropic = has46;
46 
47 static if(useARBTextureFilterAnisotropic) {
48     private bool _hasARBTextureFilterAnisotropic;
49     @nogc nothrow bool hasARBTextureFilterAnisotropic() { return _hasARBTextureFilterAnisotropic; }
50 
51     enum : uint {
52         GL_TEXTURE_MAX_ANISOTROPY           = 0x84FE,
53         GL_MAX_TEXTURE_MAX_ANISOTROPY       = 0x84FF,
54     }
55 }
56 else enum hasARBTextureFilterAnisotropic = false;
57 
58 package(bindbc.opengl) @nogc nothrow
59 bool loadARB46(SharedLib lib, GLSupport contextVersion)
60 {
61     static if(has46) {
62         if(contextVersion >= GLSupport.gl46) {
63             _hasARBTextureFilterAnisotropic = true;
64 
65             bool ret = true;
66             ret = _hasARBPolygonOffsetClamp = lib.loadARBPolygonOffsetClamp(contextVersion);
67             return ret;
68         }
69     }
70 
71     static if(useARBTextureFilterAnisotropic) _hasARBTextureFilterAnisotropic =
72             hasExtension(contextVersion, "GL_ARB_texture_filter_anisotropic");
73 
74     static if(useARBPolygonOffsetClamp) _hasARBPolygonOffsetClamp =
75             hasExtension(contextVersion, "GL_ARB_polygon_offset_clamp") &&
76             lib.loadARBPolygonOffsetClamp(contextVersion);
77 
78     return true;
79 }