Re: [Vala] Allow passing ref/out as a pointer.

[Sergej Reich <sergej reich googlemail com>]

I've written a vapi for GLEW that addresses most of the issues the GL
vapi has. In the end I ended up using pointers everywhere since it's
much simpler.
I've used it in my projects for a while now, if you want I can put it up
somewhere.

Am Sonntag, den 15.04.2012, 12:53 +0300 schrieb Tal Hadad:
> Luca, when I test it now I get that the method don't do anything (and
> it should).
> Test code:
> GLuint[2] a = {20000,50000};
> glGenBuffers (a);
> stdout.printf ("Buffers: " + ((uint)a[0]).to_string () + ", "+ ((uint)a[1]).to_string () + "\n");
> ....
> public extern void glGenBuffers ([CCode (array_length_pos = 0.1)] GL.GLuint[] buffers);
>
> And output:
> Buffers: 20000, 50000
>
> So it seems that it don't do anything, when it should change values.
> My OpenGL hardware&drivers are fine.
> The other GL code in my program display a simple triangle that
> works 100%, and so is Compiz Fusion.
>
> Do you know what is the problem?
>
> Tal
>
> Date: Sun, 15 Apr 2012 11:26:41 +0200
> Subject: Re: [Vala] Allow passing ref/out as a pointer.
> From: lethalman88 gmail com
> To: tal_hd hotmail com
> CC: vala-list gnome org
>
> 2012/4/15 Tal Hadad <tal_hd hotmail com>
>
>
>
>  There's two GL vapis in ExternalBinding page. I'm talking about
>
> the one inside the brackets[0]. This is part of the vapi:
>
> public static void glGenBuffers (GL.GLsizei n, [CCode (array_length = false, array_null_terminated = true)] 
> out unowned GL.GLuint[] buffers);
>
> public static void glDeleteBuffers (GL.GLsizei n, [CCode (array_length = false, array_null_terminated = 
> true)] GL.GLuint[]? buffers);
>
>
>
> The GL C API is:
>
> void glGenBuffers (GLsize n, GLuint *buffers)
>
> void glDeleteBuffers (GLsize n, GLuint *buffers)
>
>
>
> Which n is the count of buffers, and buffers represent a pointer
>
> to the first element.
>
>
>
> The generation of method glGenBuffers is completely buggy (i.e.
>
> failed even if I pass an GL.GLuint[] array).
>
> However, the generation of the second method is OK.
>
>
>
> Take a look at the first method. What the parameter should be?
>
> Is it should be "out GL.GLuint first_element"?
>
> public static void glGenBuffers ([CCode (array_length_pos = 0.1)] GL.GLuint[] buffers);
> public static void glDeleteBuffers ([CCode (array_length_pos = 0.1)] GL.GLuint[] buffers);
>
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