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 deprecated("Use GLVAO instead") alias VAO = GLVAO;
11 final class GLVAO
12 {
13     public
14     {
15         /// Creates a VAO.
16         /// Throws: $(D OpenGLException) on error.
17         this(OpenGL gl)
18         {
19             _gl = gl;
20             glGenVertexArrays(1, &_handle);
21             gl.runtimeCheck();
22             _initialized = true;
23         }
24 
25         /// Releases the OpenGL VAO resource.
26         ~this()
27         {
28             if (_initialized)
29             {
30                 debug ensureNotInGC("GLVAO");
31                 glDeleteVertexArrays(1, &_handle);
32                 _initialized = false;
33             }
34         }
35         deprecated("Use .destroy instead") void close(){}
36 
37         /// Uses this VAO.
38         /// Throws: $(D OpenGLException) on error.
39         void bind()
40         {
41             glBindVertexArray(_handle);
42             _gl.runtimeCheck();
43         }
44 
45         /// Unuses this VAO.
46         /// Throws: $(D OpenGLException) on error.
47         void unbind()
48         {
49             glBindVertexArray(0);
50             _gl.runtimeCheck();
51         }
52 
53         /// Returns: Wrapped OpenGL resource handle.
54         GLuint handle() pure const nothrow
55         {
56             return _handle;
57         }
58     }
59 
60     private
61     {
62         OpenGL _gl;
63         GLuint _handle;
64         bool _initialized;
65     }
66 }