gfm.opengl.vao source code

1 module gfm.opengl.vao;
2 
3 import std.string;
4 
5 import derelict.opengl3.gl3;
6 
7 import gfm.opengl.opengl;
8 
9 /// OpenGL Vertex Array Object wrapper.
10 final class VAO
11 {
12     public
13     {
14         /// Creates a VAO.
15         /// Throws: $(D OpenGLException) on error.
16         this(OpenGL gl)
17         {
18             _gl = gl;
19             glGenVertexArrays(1, &_handle);
20             gl.runtimeCheck();
21             _initialized = true;
22         }
23 
24         ~this()
25         {
26             close();
27         }
28 
29         /// Releases the OpenGL VAO resource.
30         void close()
31         {
32             if (_initialized)
33             {
34                 glDeleteVertexArrays(1, &_handle);
35                 _initialized = false;
36             }
37         }
38 
39         /// Uses this VAO.
40         /// Throws: $(D OpenGLException) on error.
41         void bind()
42         {
43             glBindVertexArray(_handle);
44             _gl.runtimeCheck();
45         }
46 
47         /// Unuses this VAO.
48         /// Throws: $(D OpenGLException) on error.
49         void unbind() 
50         {
51             glBindVertexArray(0);
52             _gl.runtimeCheck();
53         }
54 
55         /// Returns: Wrapped OpenGL resource handle.
56         GLuint handle() pure const nothrow
57         {
58             return _handle;
59         }
60     }
61 
62     private
63     {
64         OpenGL _gl;
65         GLuint _handle;
66         bool _initialized;
67     }
68 }