bindbc.wgpu.loader source code

1 /*
2 Copyright (c) 2019-2021 Timur Gafarov.
3 
4 Boost Software License - Version 1.0 - August 17th, 2003
5 
6 Permission is hereby granted, free of charge, to any person or organization
7 obtaining a copy of the software and accompanying documentation covered by
8 this license (the "Software") to use, reproduce, display, distribute,
9 execute, and transmit the Software, and to prepare derivative works of the
10 Software, and to permit third-parties to whom the Software is furnished to
11 do so, all subject to the following:
12 
13 The copyright notices in the Software and this entire statement, including
14 the above license grant, this restriction and the following disclaimer,
15 must be included in all copies of the Software, in whole or in part, and
16 all derivative works of the Software, unless such copies or derivative
17 works are solely in the form of machine-executable object code generated by
18 a source language processor.
19 
20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
23 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
24 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
25 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 DEALINGS IN THE SOFTWARE.
27 */
28 module bindbc.wgpu.loader;
29 
30 import core.stdc.stdint;
31 import bindbc.loader;
32 import bindbc.wgpu.types;
33 import bindbc.wgpu.funcs;
34 
35 enum WGPUSupport
36 {
37     noLibrary,
38     badLibrary,
39     wgpu010
40 }
41 
42 private
43 {
44     SharedLib lib;
45     WGPUSupport loadedVersion;
46 }
47 
48 void unloadWGPU()
49 {
50     if (lib != invalidHandle)
51     {
52         lib.unload();
53     }
54 }
55 
56 WGPUSupport loadedWGPUVersion()
57 {
58     return loadedVersion;
59 }
60 
61 bool isWGPULoaded()
62 {
63     return lib != invalidHandle;
64 }
65 
66 WGPUSupport loadWGPU()
67 {
68     version(Windows)
69     {
70         const(char)[][1] libNames =
71         [
72             "libwgpu.dll"
73         ];
74     }
75     else version(OSX)
76     {
77         const(char)[][1] libNames =
78         [
79             "libwgpu.dylib"
80         ];
81     }
82     else version(Posix)
83     {
84         const(char)[][2] libNames =
85         [
86             "libwgpu.so",
87             "/usr/local/lib/libwgpu.so",
88         ];
89     }
90     else static assert(0, "libwgpu is not yet supported on this platform.");
91     
92     WGPUSupport ret;
93     foreach(name; libNames)
94     {
95         ret = loadWGPU(name.ptr);
96         if (ret != WGPUSupport.noLibrary)
97             break;
98     }
99     return ret;
100 }
101 
102 WGPUSupport loadWGPU(const(char)* libName)
103 {
104     lib = load(libName);
105     if(lib == invalidHandle)
106     {
107         return WGPUSupport.noLibrary;
108     }
109     
110     auto errCount = errorCount();
111     loadedVersion = WGPUSupport.badLibrary;
112     
113     import std.algorithm.searching: startsWith;
114     static foreach(m; __traits(allMembers, bindbc.wgpu.funcs))
115     {
116         static if (m.startsWith("da_"))
117             lib.bindSymbol(
118                 cast(void**)&__traits(getMember, bindbc.wgpu.funcs, m[3..$]),
119                 __traits(getMember, bindbc.wgpu.funcs, m[3..$]).stringof);
120     }
121     
122     loadedVersion = WGPUSupport.wgpu010;
123     
124     if (errorCount() != errCount)
125         return WGPUSupport.badLibrary;
126     
127     return loadedVersion;
128 }