There are standard typecast functions that are common to most drivers.
They are used to typecast, for example, an _EGLSurface to a
driver-defined type.
This commits define _EGL_DRIVER_STANDARD_TYPECASTS and
_EGL_DRIVER_TYPECAST that should hopefully save some typings for driver
writers.
We were misinterpretting GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS previously.
It's the number of texture units for which we need to keep state; not
just the total number of texture units addressable by the vertex shader
plus fragment shader.
Since sw Mesa independently supports 16 texture units in vertex shaders
and 16 texture units in fragment shaders, the max combined units is 32.
Note that the docs for glActiveTexture() indicate the max legal unit is
MAX(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, MAX_TEXTURE_COORDS) - 1.
A new piglit test (texunits.c) tests the various texture unit limits.
I'm pretty sure I've got this all right now, but additional reviews
are welcome...
This should make things easier for drivers wanting to work with a
"subclass" of gl_framebuffer.
The complementary "_mesa_initialize_framebuffer" function is now
called "_mesa_initialize_window_framebuffer" for the sake of
symmetry.
Signed-off-by: Brian Paul <brianp@vmware.com>
The in-place splitting code wasn't dealing with index buffers at all
(and it was being called from vbo_split_prims for too big index
buffers, causing some occasional corruption).
Additionally, it wasn't taking into account primitives arrays with
non-contiguous indices (e.g. given prim[0].start = 0 and prim[1].start
= max_verts, it would happily call back the driver with (max_index -
min_index) still greater than max_verts, causing infinite recursion).
It still doesn't handle too large indexed vertex buffers: use
vbo_split_copy for that.
Texture derivatives are potentially undefined inside dynamic branches,
so hardwire lod zero in this case. Treating all if/endif and loop
constructs as dynamic branches.
Rename _eglPreloadFile to _eglLoaderFile, and _eglPreloadFile to
_eglLoaderFile. There are several _eglPreload* functions. The
callbacks do not belong to them and it should be better to give them a
different prefix.
