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mutter/cogl/cogl-feature-private.h

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cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
/*
* 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
Remove mentions of the FSF address Since using addresses that might change is something that finally the FSF acknowledge as a plausible scenario (after changing address twice), the license blurb in the source files should use the URI for getting the license in case the library did not come with it. Not that URIs cannot possibly change, but at least it's easier to set up a redirection at the same place. As a side note: this commit closes the oldes bug in Clutter's bug report tool. http://bugzilla.openedhand.com/show_bug.cgi?id=521
2010-03-01 12:56:10 +00:00
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
*/
#ifndef __COGL_FEATURE_PRIVATE_H
#define __COGL_FEATURE_PRIVATE_H
#include <glib.h>
Moves all GLX code down from Clutter to Cogl This migrates all the GLX window system code down from the Clutter backend code into a Cogl winsys. Moving OpenGL window system binding code down from Clutter into Cogl is the biggest blocker to having Cogl become a standalone 3D graphics library, so this is an important step in that direction.
2010-11-05 12:28:33 +00:00
#include "cogl-internal.h"
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
#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)))
Move all of the GL function pointers directly to CoglContext 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.
2011-07-06 17:59:20 +00:00
typedef enum
{
COGL_EXT_IN_GLES = (1 << 0),
COGL_EXT_IN_GLES2 = (1 << 1)
} CoglExtGlesAvailability;
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
typedef struct _CoglFeatureFunction CoglFeatureFunction;
struct _CoglFeatureFunction
{
/* The name of the function without the "EXT" or "ARB" suffix */
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-10 01:57:32 +00:00
const char *name;
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
/* The offset in the context of where to store the function pointer */
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-10 01:57:32 +00:00
unsigned int pointer_offset;
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
};
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 */
Move all of the GL function pointers directly to CoglContext 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.
2011-07-06 17:59:20 +00:00
int min_gl_major, min_gl_minor;
/* Flags specifying which versions of GLES the feature is available
in core in */
CoglExtGlesAvailability gles_availability;
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
/* \0 separated list of namespaces to try. Eg "EXT\0ARB\0" */
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-10 01:57:32 +00:00
const char *namespaces;
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
/* \0 separated list of required extension names without the GL_EXT
Move all of the GL function pointers directly to CoglContext 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.
2011-07-06 17:59:20 +00:00
or GL_ARB prefix. Any of the extensions must be available for the
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
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 */
cogl: improves header and coding style consistency We've had complaints that our Cogl code/headers are a bit "special" so this is a first pass at tidying things up by giving them some consistency. These changes are all consistent with how new code in Cogl is being written, but the style isn't consistently applied across all code yet. There are two parts to this patch; but since each one required a large amount of effort to maintain tidy indenting it made sense to combine the changes to reduce the time spent re indenting the same lines. The first change is to use a consistent style for declaring function prototypes in headers. Cogl headers now consistently use this style for prototypes: return_type cogl_function_name (CoglType arg0, CoglType arg1); Not everyone likes this style, but it seems that most of the currently active Cogl developers agree on it. The second change is to constrain the use of redundant glib data types in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all been replaced with int, unsigned int, float, long, unsigned long and char respectively. When talking about pixel data; use of guchar has been replaced with guint8, otherwise unsigned char can be used. The glib types that we continue to use for portability are gboolean, gint{8,16,32,64}, guint{8,16,32,64} and gsize. The general intention is that Cogl should look palatable to the widest range of C programmers including those outside the Gnome community so - especially for the public API - we want to minimize the number of foreign looking typedefs.
2010-02-10 01:57:32 +00:00
const char *extension_names;
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
/* A set of feature flags to enable if the extension is available */
CoglFeatureFlags feature_flags;
egl: Check EGL extension as early as possible Instead of waiting until initializing a CoglContext we now check EGL extensions after calling eglInitialize.
2011-05-24 16:21:28 +00:00
/* A set of private feature flags to enable if the extension is
* available */
int feature_flags_private;
Moves all GLX code down from Clutter to Cogl This migrates all the GLX window system code down from the Clutter backend code into a Cogl winsys. Moving OpenGL window system binding code down from Clutter into Cogl is the biggest blocker to having Cogl become a standalone 3D graphics library, so this is an important step in that direction.
2010-11-05 12:28:33 +00:00
/* An optional corresponding winsys feature. */
CoglWinsysFeature winsys_feature;
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
/* A list of functions required for this feature. Terminated with a
NULL name */
const CoglFeatureFunction *functions;
};
Moves all GLX code down from Clutter to Cogl This migrates all the GLX window system code down from the Clutter backend code into a Cogl winsys. Moving OpenGL window system binding code down from Clutter into Cogl is the biggest blocker to having Cogl become a standalone 3D graphics library, so this is an important step in that direction.
2010-11-05 12:28:33 +00:00
gboolean
Add internal _cogl_get_proc_address This adds an internal _cogl_get_proc_address that doesn't need a CoglContext. This will enable us to check driver features earlier.
2011-05-24 00:38:48 +00:00
_cogl_feature_check (const CoglWinsysVtable *winsys,
const char *driver_prefix,
Moves all GLX code down from Clutter to Cogl This migrates all the GLX window system code down from the Clutter backend code into a Cogl winsys. Moving OpenGL window system binding code down from Clutter into Cogl is the biggest blocker to having Cogl become a standalone 3D graphics library, so this is an important step in that direction.
2010-11-05 12:28:33 +00:00
const CoglFeatureData *data,
Move all of the GL function pointers directly to CoglContext 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.
2011-07-06 17:59:20 +00:00
int gl_major,
int gl_minor,
Dynamically load the GL or GLES library 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
2011-07-07 19:44:56 +00:00
CoglDriver driver,
Moves all GLX code down from Clutter to Cogl This migrates all the GLX window system code down from the Clutter backend code into a Cogl winsys. Moving OpenGL window system binding code down from Clutter into Cogl is the biggest blocker to having Cogl become a standalone 3D graphics library, so this is an important step in that direction.
2010-11-05 12:28:33 +00:00
const char *extensions_string,
void *function_table);
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
Move all of the GL function pointers directly to CoglContext 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.
2011-07-06 17:59:20 +00:00
void
_cogl_feature_check_ext_functions (CoglContext *context,
int gl_major,
int gl_minor,
Dynamically load the GL or GLES library 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
2011-07-07 19:44:56 +00:00
const char *gl_extensions);
Move all of the GL function pointers directly to CoglContext 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.
2011-07-06 17:59:20 +00:00
cogl: Make it easier to add checks for GL extensions Previously if you need to depend on a new GL feature you had to: - Add typedefs for all of the functions in cogl-defines.h.in - Add function pointers for each of the functions in cogl-context-driver.h - Add an initializer for the function pointers in cogl-context-driver.c - Add a check for the extension and all of the functions in cogl_features_init. If the extension is available under multiple names then you have to duplicate the checks. This is quite tedious and error prone. This patch moves all of the features and their functions into a list of macro invocations in cogl-feature-functions.h. The macros can be redefined to implement all of the above tasks from the same header. The features are described in a struct with a pointer to a table of functions. A new function takes the feature description from this struct and checks for its availability. The feature can take a list of extension names with a list of alternate namespaces (such as "EXT" or "ARB"). It can also detect the feature from a particular version of GL. The typedefs are now gone and instead the function pointer in the Cogl context just directly contains the type. Some of the functions in the context were previously declared with the 'ARB' extension. This has been removed so that now all the functions have no suffix. This makes more sense when the extension could potentially be merged into GL core as well.
2009-11-17 13:52:40 +00:00
#endif /* __COGL_FEATURE_PRIVATE_H */
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