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 GLVAO
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         /// Releases the OpenGL VAO resource.
25         ~this()
26         {
27             if (_initialized)
28             {
29                 debug ensureNotInGC("GLVAO");
30                 glDeleteVertexArrays(1, &_handle);
31                 _initialized = false;
32             }
33         }
34 
35         /// Uses this VAO.
36         /// Throws: $(D OpenGLException) on error.
37         void bind()
38         {
39             glBindVertexArray(_handle);
40             _gl.runtimeCheck();
41         }
42 
43         /// Unuses this VAO.
44         /// Throws: $(D OpenGLException) on error.
45         void unbind()
46         {
47             glBindVertexArray(0);
48             _gl.runtimeCheck();
49         }
50 
51         /// Returns: Wrapped OpenGL resource handle.
52         GLuint handle() pure const nothrow
53         {
54             return _handle;
55         }
56     }
57 
58     private
59     {
60         OpenGL _gl;
61         GLuint _handle;
62         bool _initialized;
63     }
64 }