waffle_context, waffle_context_create, waffle_context_destroy, waffle_context_get_native — class waffle_context
#include <waffle.h>
struct waffle_context;
struct waffle_context* waffle_context_create( |
struct waffle_config *config, |
struct waffle_context *shared_ctx); |
bool waffle_context_destroy( |
struct waffle_context *self); |
union waffle_native_context* waffle_context_get_native( |
struct waffle_context *self); |
An opaque type.
waffle_context_create()
Create a context for OpenGL rendering with the properties specified by config.
The returned context's actual properties may differ from,
but are guaranteed to be compatible with,
the properties specified by config.
See the section called “Version Promotion” below for details.
If share_ctx is not null, then the newly created context is added to the share group
of share_ctx. Some data, such as display lists, are shared among all contexts
that belong to the same share group. For details on what data is shared, see the specification for the
relevant native platform:
the GLX 1.4 Specification,
the EGL 1.4 Specification,
or the CGL Reference.
waffle_context_destroy()Destroy the context and release its memory.
waffle_context_get_native()
Get the context's underlying native objects. Use
free(3) to deallocate the
returned pointer.
See waffle_native(3)
for the definition of union waffle_native_context.
The context's requested version and profile is given by the config attributes
WAFFLE_CONTEXT_MAJOR_VERSION,
WAFFLE_CONTEXT_MINOR_VERSION,
WAFFLE_CONTEXT_PROFILE.
The context returned by waffle_context_create
may implement any version and profile
that is backwards compatible with that requested,
as described below.
If the chosen API is
WAFFLE_OPENGL_ES1,
WAFFLE_OPENGL_ES2, or
WAFFLE_OPENGL_ES3,
then the returned context may implement any of:
| * The requested version. |
| * Any later version, so long as no features have been from that later version. |
If the chosen API is WAFFLE_CONTEXT_OPENGL
and version 3.0 or less is requested,
then the returned context may implement any of:
| * Any version no less than that requested and no greater than 3.0. |
| * Version 3.1, if the GL_ARB_compatibility extension is also implemented. |
| * The compatibility profile of version 3.2 or greater. |
If the chosen API is WAFFLE_CONTEXT_OPENGL
and version 3.1 is requested,
then the returned context may implement any of:
| * Version 3.1, with or without the GL_ARB_compatibility extension. |
| * The core profile of version 3.2 or greater. |
If the chosen API is WAFFLE_CONTEXT_OPENGL
and version 3.2 or greater is requested,
then the returned context may implement any of:
| * The requested profile and version. |
* The requested profile of any later version, so long as no features have been from that later version and profile. |
Functions whose return type is bool return true on success and false on failure. Functions whose return
type is a pointer return NULL on failure. Use
waffle_error_get_info(3) to get
information about any errors.
See waffle_error(3) for the complete list of waffle's error codes.
No errors are specific to the waffle_context functions.
Please report bugs or and feature requests to https://gitlab.freedesktop.org/mesa/waffle/issues.