mesa/main: Add function to find next higher power of two.
With gcc implementation uses __builtin_clr which counts number of
leading zeros.
Fallback implementation uses bit manipulation. First it duplicates
the highest bit to all lower bits and then adds one to get the power
of two number.
radeon: Remove the loop from stride size calculation.
Changed stride size calculation to do the math by rounding
the value instead of loop. r600 minimum stride is 256 which
might might cause up to about 60 rounds of the loop.
i965: Keep the CURBE BO mapped and memcpy instead of subdataing.
For the tiny bis of data we generally upload through the CURBEs, the
overhead of the kernel's pagetable trickery is actually rather high.
This improves cairo-gl gnome-terminal-vim performance by 3.8%.
st/mesa: allow negative index for PROGRAM_STATE_VAR
The piglit vp-address-01 test uses negative address-relative
offsets. In this test we're indexing into PROGRAM_STATE_VAR
which, in turn, contains references to ENV vars.
We previously fixed this issue for PROGRAM_CONSTANT.
piglit/vp-address-01 (the version from Feb 5) passes now.
(cherry picked from commit 64be837b0b)
osmesa: Add OSMesaColorClamp and OSMesaGetProcAddress to symbol defs.
Without this patch, the two symbols get an underscore prepended
and an "@4" appended when compiling with VC8.
Signed-off-by: Brian Paul <brianp@vmware.com>
(cherry picked from commit e65029e9b3)
This fixes the progs/glsl/pointcoord.c demo. But this isn't a proper fix.
We really need a TGSI_SEMANTIC_POINT_COORD label so that the draw module
can determine which fragment input / vertex output slot needs to be set
up with the point coordinate info. We've been using generic slot 0 so far.
This would also require telling the draw module about fragment shaders
(something it doesn't have at this time).
tgsi: remove special-case code for fragment position
Since the origin_lower_left / pixel_center_origin changes, we need
to use the fragcoord info that's set up in setup_fragcoord_coeff().
The code in exec_declaration() was clobbering the the interpolated
fragment position.
Fixes progs/glsl/fragcoord.c demo.