dae02a99a5
Instead of storing all of the feature function pointers in the driver specific data of the CoglContext they are now all stored directly in CoglContext. There is a single header containing the description of the functions which gets included by cogl-context.h. There is a single function in cogl-feature-private.c to check for all of these functions. The name of the function pointer variables have been changed from ctx->drv.pf_glWhatever to just ctx->glWhatever. The feature flags that get set when an extension is available are now separated from the table of extensions. This is necessary because different extensions can mean different things on GLES and GL. For example, having access to glMapBuffer implies read and write support on GL but only write support on GLES. The flags are instead set in the driver specific init function by checking whether the function pointers were successfully resolved. _cogl_feature_check has been changed to assume the feature is supported if any of the listed extensions are available instead of requiring all of them. This makes it more convenient to specify alternate names for the extension. Nothing else had previously listed more than one name for an extension so this shouldn't cause any problems.
101 lines
3.4 KiB
C
101 lines
3.4 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifndef __COGL_FEATURE_PRIVATE_H
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#define __COGL_FEATURE_PRIVATE_H
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#include <glib.h>
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#include "cogl-internal.h"
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#define COGL_CHECK_GL_VERSION(driver_major, driver_minor, \
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target_major, target_minor) \
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((driver_major) > (target_major) || \
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((driver_major) == (target_major) && (driver_minor) >= (target_minor)))
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typedef enum
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{
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COGL_EXT_IN_GLES = (1 << 0),
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COGL_EXT_IN_GLES2 = (1 << 1)
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} CoglExtGlesAvailability;
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typedef struct _CoglFeatureFunction CoglFeatureFunction;
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struct _CoglFeatureFunction
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{
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/* The name of the function without the "EXT" or "ARB" suffix */
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const char *name;
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/* The offset in the context of where to store the function pointer */
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unsigned int pointer_offset;
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};
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typedef struct _CoglFeatureData CoglFeatureData;
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struct _CoglFeatureData
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{
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/* A minimum GL version which the functions should be defined in
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without needing an extension. Set to 255,255 if it's only
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provided in an extension */
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int min_gl_major, min_gl_minor;
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/* Flags specifying which versions of GLES the feature is available
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in core in */
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CoglExtGlesAvailability gles_availability;
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/* \0 separated list of namespaces to try. Eg "EXT\0ARB\0" */
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const char *namespaces;
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/* \0 separated list of required extension names without the GL_EXT
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or GL_ARB prefix. Any of the extensions must be available for the
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feature to be considered available. If the suffix for an
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extension is different from the namespace, you can specify it
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with a ':' after the namespace */
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const char *extension_names;
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/* A set of feature flags to enable if the extension is available */
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CoglFeatureFlags feature_flags;
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/* A set of private feature flags to enable if the extension is
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* available */
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int feature_flags_private;
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/* An optional corresponding winsys feature. */
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CoglWinsysFeature winsys_feature;
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/* A list of functions required for this feature. Terminated with a
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NULL name */
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const CoglFeatureFunction *functions;
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};
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gboolean
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_cogl_feature_check (const CoglWinsysVtable *winsys,
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const char *driver_prefix,
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const CoglFeatureData *data,
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int gl_major,
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int gl_minor,
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CoglExtGlesAvailability gles_version,
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const char *extensions_string,
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void *function_table);
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void
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_cogl_feature_check_ext_functions (CoglContext *context,
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int gl_major,
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int gl_minor,
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const char *gl_extensions,
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CoglExtGlesAvailability gles_version);
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#endif /* __COGL_FEATURE_PRIVATE_H */
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