mutter/gles/cogl.c
Robert Bragg c1afd0de69 [cogl vertex buffers] Adds fallbacks for drivers without VBO support
Buffer objects aren't currently available for glx indirect contexts, so we
now have a fallback that simply allocates fake client side vbos to store the
attributes.
2009-04-20 13:04:34 +01:00

75 lines
1.8 KiB
C

/*
* Cogl
*
* A basic GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009 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 <string.h>
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-context.h"
CoglFuncPtr
cogl_get_proc_address (const gchar* name)
{
return NULL;
}
gboolean
cogl_check_extension (const gchar *name, const gchar *ext)
{
return FALSE;
}
void
_cogl_features_init (void)
{
CoglFeatureFlags flags = 0;
int max_clip_planes = 0;
GLint num_stencil_bits = 0;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
GE( glGetIntegerv (GL_STENCIL_BITS, &num_stencil_bits) );
/* We need at least three stencil bits to combine clips */
if (num_stencil_bits > 2)
flags |= COGL_FEATURE_STENCIL_BUFFER;
GE( glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
if (max_clip_planes >= 4)
flags |= COGL_FEATURE_FOUR_CLIP_PLANES;
#ifdef HAVE_COGL_GLES2
flags |= COGL_FEATURE_SHADERS_GLSL | COGL_FEATURE_OFFSCREEN;
#endif
flags |= COGL_FEATURE_VBOS;
/* Cache features */
ctx->feature_flags = flags;
ctx->features_cached = TRUE;
}