mirror of
https://github.com/brl/mutter.git
synced 2024-12-29 14:22:13 +00:00
c415818537
This moves the functionality of _cogl_create_context_driver from
driver/{gl,gles}/cogl-context-driver-{gl,gles}.c into
driver/{gl,gles}/cogl-{gl,gles}.c as a static function called
initialize_context_driver.
cogl-context-driver-{gl,gles}.[ch] have now been removed.
135 lines
4.1 KiB
C
135 lines
4.1 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2007,2008,2009 Intel Corporation.
|
|
*
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
|
|
#include "cogl.h"
|
|
#include "cogl-internal.h"
|
|
#include "cogl-context-private.h"
|
|
#include "cogl-feature-private.h"
|
|
|
|
gboolean
|
|
_cogl_check_driver_valid (GError **error)
|
|
{
|
|
/* The GLES backend doesn't have any particular version requirements */
|
|
return TRUE;
|
|
}
|
|
|
|
/* Define a set of arrays containing the functions required from GL
|
|
for each feature */
|
|
#define COGL_FEATURE_BEGIN(name, min_gl_major, min_gl_minor, \
|
|
namespaces, extension_names, \
|
|
feature_flags, feature_flags_private) \
|
|
static const CoglFeatureFunction cogl_feature_ ## name ## _funcs[] = {
|
|
#define COGL_FEATURE_FUNCTION(ret, name, args) \
|
|
{ G_STRINGIFY (name), G_STRUCT_OFFSET (CoglContext, drv.pf_ ## name) },
|
|
#define COGL_FEATURE_END() \
|
|
{ NULL, 0 }, \
|
|
};
|
|
#include "cogl-feature-functions-gles.h"
|
|
|
|
/* Define an array of features */
|
|
#undef COGL_FEATURE_BEGIN
|
|
#define COGL_FEATURE_BEGIN(name, min_gl_major, min_gl_minor, \
|
|
namespaces, extension_names, \
|
|
feature_flags, feature_flags_private) \
|
|
{ min_gl_major, min_gl_minor, namespaces, \
|
|
extension_names, feature_flags, feature_flags_private, \
|
|
cogl_feature_ ## name ## _funcs },
|
|
#undef COGL_FEATURE_FUNCTION
|
|
#define COGL_FEATURE_FUNCTION(ret, name, args)
|
|
#undef COGL_FEATURE_END
|
|
#define COGL_FEATURE_END()
|
|
|
|
static const CoglFeatureData cogl_feature_data[] =
|
|
{
|
|
#include "cogl-feature-functions-gles.h"
|
|
};
|
|
|
|
#undef COGL_FEATURE_BEGIN
|
|
#define COGL_FEATURE_BEGIN(a, b, c, d, e, f, g)
|
|
#undef COGL_FEATURE_FUNCTION
|
|
#define COGL_FEATURE_FUNCTION(ret, name, args) \
|
|
_context->drv.pf_ ## name = NULL;
|
|
#undef COGL_FEATURE_END
|
|
#define COGL_FEATURE_END()
|
|
|
|
static void
|
|
initialize_context_driver (CoglContext *context)
|
|
{
|
|
#include "cogl-feature-functions-gles.h"
|
|
}
|
|
|
|
void
|
|
_cogl_gl_context_init (CoglContext *context)
|
|
{
|
|
CoglFeatureFlags flags = 0;
|
|
#ifndef HAVE_COGL_GLES2
|
|
int max_clip_planes = 0;
|
|
#endif
|
|
int num_stencil_bits = 0;
|
|
const char *gl_extensions;
|
|
int i;
|
|
|
|
initialize_context_driver (context);
|
|
|
|
gl_extensions = (const char*) glGetString (GL_EXTENSIONS);
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (cogl_feature_data); i++)
|
|
if (_cogl_feature_check ("GL", cogl_feature_data + i,
|
|
0, 0,
|
|
gl_extensions))
|
|
flags |= cogl_feature_data[i].feature_flags;
|
|
|
|
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;
|
|
|
|
#ifndef HAVE_COGL_GLES2
|
|
GE( glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
|
|
if (max_clip_planes >= 4)
|
|
flags |= COGL_FEATURE_FOUR_CLIP_PLANES;
|
|
#endif
|
|
|
|
#ifdef HAVE_COGL_GLES2
|
|
flags |= COGL_FEATURE_SHADERS_GLSL | COGL_FEATURE_OFFSCREEN;
|
|
/* Note GLES 2 core doesn't support mipmaps for npot textures or
|
|
* repeat modes other than CLAMP_TO_EDGE. */
|
|
flags |= COGL_FEATURE_TEXTURE_NPOT_BASIC;
|
|
#endif
|
|
|
|
flags |= COGL_FEATURE_VBOS;
|
|
|
|
/* Both GLES 1.1 and GLES 2.0 support point sprites in core */
|
|
flags |= COGL_FEATURE_POINT_SPRITE;
|
|
|
|
/* Cache features */
|
|
context->feature_flags = flags;
|
|
}
|
|
|