Hello Li Zhi,
I have done a quick search, and it seems that glBegin is mapped to
vbo_exec_Begin.
I'm not using the same version of Mesa as you, but here is how it works for me.
In vbo_exec_api.c, function vbo_exec_vtxfmt_init, you get
vfmt->Begin = vbo_exec_Begin;
And after, in vtxfmt.c, function install_vtxfmt
SET_Begin(tab, vfmt->Begin);
SET_Begin calls a macro (SET_by_offset) mapping the vbo_exec_Begin to glBegin.
The macro is located in dispatch.h
Hope it helps you,
Pierre Moreau
> On 27 juil. 2013, at 03:18, ZhiLi <ditto_zh...@hotmail.com> wrote:
>
> Hello everyone,
>
> I am an university student working on school project related to OpenGL.
> Now I am using mesa library (version 9.0.3) as an implementation of OpenGL.
> I have a few questions about Mesa library.
>
> glBegin()/glEnd() pair is used for immediate mode rendering, so I study the
> source code to find out
> how these functions work.
>
> In file "vbo_exec_api.c" line 800, the comment says function vbo_exec_Begin
> is called via glBegin().
>
> However, in all library files, I cannot find where and how glBegin() calls
> the function.
>
> Could you give some hints and explanations? I am really appreciating your
> help. Thanks.
>
> Li Zhi
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> mesa-dev@lists.freedesktop.org
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