b2e735ff7f
The GL or GLES library is now dynamically loaded by the CoglRenderer so that it can choose between GL, GLES1 and GLES2 at runtime. The library is loaded by the renderer because it needs to be done before calling eglInitialize. There is a new environment variable called COGL_DRIVER to choose between gl, gles1 or gles2. The #ifdefs for HAVE_COGL_GL, HAVE_COGL_GLES and HAVE_COGL_GLES2 have been changed so that they don't assume the ifdefs are mutually exclusive. They haven't been removed entirely so that it's possible to compile the GLES backends without the the enums from the GL headers. When using GLX the winsys additionally dynamically loads libGL because that also contains the GLX API. It can't be linked in directly because that would probably conflict with the GLES API if the EGL is selected. When compiling with EGL support the library links directly to libEGL because it doesn't contain any GL API so it shouldn't have any conflicts. When building for WGL or OSX Cogl still directly links against the GL API so there is a #define in config.h so that Cogl won't try to dlopen the library. Cogl-pango previously had a #ifdef to detect when the GL backend is used so that it can sneakily pass GL_QUADS to cogl_vertex_buffer_draw. This is now changed so that it queries the CoglContext for the backend. However to get this to work Cogl now needs to export the _cogl_context_get_default symbol and cogl-pango needs some extra -I flags to so that it can include cogl-context-private.h
100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 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/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifndef __COGL_FEATURE_PRIVATE_H
|
|
#define __COGL_FEATURE_PRIVATE_H
|
|
|
|
#include <glib.h>
|
|
|
|
#include "cogl-internal.h"
|
|
|
|
#define COGL_CHECK_GL_VERSION(driver_major, driver_minor, \
|
|
target_major, target_minor) \
|
|
((driver_major) > (target_major) || \
|
|
((driver_major) == (target_major) && (driver_minor) >= (target_minor)))
|
|
|
|
typedef enum
|
|
{
|
|
COGL_EXT_IN_GLES = (1 << 0),
|
|
COGL_EXT_IN_GLES2 = (1 << 1)
|
|
} CoglExtGlesAvailability;
|
|
|
|
typedef struct _CoglFeatureFunction CoglFeatureFunction;
|
|
|
|
struct _CoglFeatureFunction
|
|
{
|
|
/* The name of the function without the "EXT" or "ARB" suffix */
|
|
const char *name;
|
|
/* The offset in the context of where to store the function pointer */
|
|
unsigned int pointer_offset;
|
|
};
|
|
|
|
typedef struct _CoglFeatureData CoglFeatureData;
|
|
|
|
struct _CoglFeatureData
|
|
{
|
|
/* A minimum GL version which the functions should be defined in
|
|
without needing an extension. Set to 255,255 if it's only
|
|
provided in an extension */
|
|
int min_gl_major, min_gl_minor;
|
|
/* Flags specifying which versions of GLES the feature is available
|
|
in core in */
|
|
CoglExtGlesAvailability gles_availability;
|
|
/* \0 separated list of namespaces to try. Eg "EXT\0ARB\0" */
|
|
const char *namespaces;
|
|
/* \0 separated list of required extension names without the GL_EXT
|
|
or GL_ARB prefix. Any of the extensions must be available for the
|
|
feature to be considered available. If the suffix for an
|
|
extension is different from the namespace, you can specify it
|
|
with a ':' after the namespace */
|
|
const char *extension_names;
|
|
/* A set of feature flags to enable if the extension is available */
|
|
CoglFeatureFlags feature_flags;
|
|
/* A set of private feature flags to enable if the extension is
|
|
* available */
|
|
int feature_flags_private;
|
|
/* An optional corresponding winsys feature. */
|
|
CoglWinsysFeature winsys_feature;
|
|
/* A list of functions required for this feature. Terminated with a
|
|
NULL name */
|
|
const CoglFeatureFunction *functions;
|
|
};
|
|
|
|
gboolean
|
|
_cogl_feature_check (const CoglWinsysVtable *winsys,
|
|
const char *driver_prefix,
|
|
const CoglFeatureData *data,
|
|
int gl_major,
|
|
int gl_minor,
|
|
CoglDriver driver,
|
|
const char *extensions_string,
|
|
void *function_table);
|
|
|
|
void
|
|
_cogl_feature_check_ext_functions (CoglContext *context,
|
|
int gl_major,
|
|
int gl_minor,
|
|
const char *gl_extensions);
|
|
|
|
#endif /* __COGL_FEATURE_PRIVATE_H */
|