mutter/clutter/cogl/gl/cogl-shader.c
Robert Bragg c3d9f0bed4 [cogl-handle] Optimize how we define cogl handles
The cogl_is_* functions were showing up quite high on profiles due to
iterating through arrays of cogl handles.

This does away with all the handle arrays and implements a simple struct
inheritance scheme. All cogl objects now add a CoglHandleObject _parent;
member to their main structures. The base object includes 2 members a.t.m; a
ref_count, and a klass pointer. The klass in turn gives you a type and
virtual function for freeing objects of that type.

Each handle type has a _cogl_##handle_type##_get_type () function
automatically defined which returns a GQuark of the handle type, so now
implementing the cogl_is_* funcs is just a case of comparing with
obj->klass->type.

Another outcome of the re-work is that cogl_handle_{ref,unref} are also much
more efficient, and no longer need extending for each handle type added to
cogl. The cogl_##handle_type##_{ref,unref} functions are now deprecated and
are no longer used internally to Clutter or Cogl. Potentially we can remove
them completely before 1.0.
2009-04-02 11:58:43 +01:00

134 lines
3.4 KiB
C

/*
* Clutter COGL
*
* A basic GL/GLES Abstraction/Utility Layer
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2008 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-shader-private.h"
#include "cogl-internal.h"
#include "cogl-context.h"
#include "cogl-handle.h"
#include <glib.h>
/* Expecting ARB functions not to be defined */
#define glCreateShaderObjectARB ctx->pf_glCreateShaderObjectARB
#define glGetObjectParameterivARB ctx->pf_glGetObjectParameterivARB
#define glGetInfoLogARB ctx->pf_glGetInfoLogARB
#define glCompileShaderARB ctx->pf_glCompileShaderARB
#define glShaderSourceARB ctx->pf_glShaderSourceARB
#define glDeleteObjectARB ctx->pf_glDeleteObjectARB
static void _cogl_shader_free (CoglShader *shader);
COGL_HANDLE_DEFINE (Shader, shader);
static void
_cogl_shader_free (CoglShader *shader)
{
/* Frees shader resources but its handle is not
released! Do that separately before this! */
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
glDeleteObjectARB (shader->gl_handle);
}
CoglHandle
cogl_create_shader (COGLenum shaderType)
{
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, 0);
shader = g_slice_new (CoglShader);
shader->gl_handle = glCreateShaderObjectARB (shaderType);
return _cogl_shader_handle_new (shader);
}
void
cogl_shader_source (CoglHandle handle,
const gchar *source)
{
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = _cogl_shader_pointer_from_handle (handle);
glShaderSourceARB (shader->gl_handle, 1, &source, NULL);
}
void
cogl_shader_compile (CoglHandle handle)
{
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = _cogl_shader_pointer_from_handle (handle);
glCompileShaderARB (shader->gl_handle);
}
void
cogl_shader_get_info_log (CoglHandle handle,
guint size,
gchar *buffer)
{
CoglShader *shader;
COGLint len;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = _cogl_shader_pointer_from_handle (handle);
glGetInfoLogARB (shader->gl_handle, size-1, &len, buffer);
buffer[len]='\0';
}
void
cogl_shader_get_parameteriv (CoglHandle handle,
COGLenum pname,
COGLint *dest)
{
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_shader (handle))
return;
shader = _cogl_shader_pointer_from_handle (handle);
glGetObjectParameterivARB (shader->gl_handle, pname, dest);
}