I couldn't find a spec for this one on the internet, but this matches
the prototype in eglmesaext.h. The note in swap_region2 says:
4) How is this extension an improvement over EGL_NOK_swap_region?
RESOLVED: This extension builds on the previous
EGL_NOK_swap_region extension by requiring that the implementation
considers the update region provided by the application as a
mandate rather than a hint. This allows for region-restricted
rendering without requiring the use of preserved buffer swaps
which may be relatively expensive for the implementation.
Furthermore, whilst preserved swap behaviour is necessary for
incremental rendering, many applications fully re-render modified
surface regions and so don't require preserved swap
behaviour. This extension provides a lighter weight surface update
mechanism for such applications.
It's been 0x000fffff on Mesa since the initial import in 1999. It's
the same value on my OS X 10.8 system, mingw's Windows-compatible
gl.h, and a copy of the windows SDK gl.h I found laying around on the
internet.
Fixes piglit ARB_multisample/pushpop.
EGL_KHR_image_base defines these two functions, and so does
EGL_KHR_image (which is bascically the union of EGL_KHR_image_base and
EGL_KHR_image_pixmap).
On OS X, GLhandleARB is void *, which is of different size than GLuint
on 64-bit. Because of this, the implementation of
glGetAttachedObjectsARB must be different from glGetAttachedShaders,
since the pointers/ints are packed the output memory.
From Mesa:
/* The "Interactions with APPLE_vertex_array_object" section of the
* GL_ARB_vertex_array_object spec says:
*
* "The first bind call, either BindVertexArray or
* BindVertexArrayAPPLE, determines the semantic of the object."
*/
Dave Airlie
Eric Anholt
Fredrik Höglund