diff options
| author | Keith Whitwell <keithw@vmware.com> | 2010-08-15 17:24:54 +0100 |
|---|---|---|
| committer | Keith Whitwell <keithw@vmware.com> | 2010-08-15 17:24:54 +0100 |
| commit | 4c0641454b952f2c240de8c83511703f98e1f72f (patch) | |
| tree | 94b5379a4308dbca9fcffa936b4ec23c2ca0530d /src/gallium/drivers/llvmpipe/lp_rast_tri.c | |
| parent | ee0d1c29eeddfa364a18783507acd4d031029ba2 (diff) | |
llvmpipe: eliminate last usage of step array in rast_tmp.h
For 16 and 64 pixel levels, calculate a mask which is linear in x and
y (ie not in the swizzle layout).
When iterating over full and partial masks, figure out position by
manipulating the bit number set in the mask, rather than relying on
postion arrays.
Similarly, calculate the lower-level c values from dcdx, dcdy and the
position rather than relying on the step array.
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_rast_tri.c')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_rast_tri.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_rast_tri.c b/src/gallium/drivers/llvmpipe/lp_rast_tri.c index 28a0446172..8ecd0567df 100644 --- a/src/gallium/drivers/llvmpipe/lp_rast_tri.c +++ b/src/gallium/drivers/llvmpipe/lp_rast_tri.c @@ -144,6 +144,35 @@ build_mask(int c, int dcdx, int dcdy) return mask; } +static INLINE unsigned +build_mask_linear(int c, int dcdx, int dcdy) +{ + int mask = 0; + + int c0 = c; + int c1 = c0 + dcdy; + int c2 = c1 + dcdy; + int c3 = c2 + dcdy; + + mask |= ((c0 + 0 * dcdx) >> 31) & (1 << 0); + mask |= ((c0 + 1 * dcdx) >> 31) & (1 << 1); + mask |= ((c0 + 2 * dcdx) >> 31) & (1 << 2); + mask |= ((c0 + 3 * dcdx) >> 31) & (1 << 3); + mask |= ((c1 + 0 * dcdx) >> 31) & (1 << 4); + mask |= ((c1 + 1 * dcdx) >> 31) & (1 << 5); + mask |= ((c1 + 2 * dcdx) >> 31) & (1 << 6); + mask |= ((c1 + 3 * dcdx) >> 31) & (1 << 7); + mask |= ((c2 + 0 * dcdx) >> 31) & (1 << 8); + mask |= ((c2 + 1 * dcdx) >> 31) & (1 << 9); + mask |= ((c2 + 2 * dcdx) >> 31) & (1 << 10); + mask |= ((c2 + 3 * dcdx) >> 31) & (1 << 11); + mask |= ((c3 + 0 * dcdx) >> 31) & (1 << 12); + mask |= ((c3 + 1 * dcdx) >> 31) & (1 << 13); + mask |= ((c3 + 2 * dcdx) >> 31) & (1 << 14); + mask |= ((c3 + 3 * dcdx) >> 31) & (1 << 15); + + return mask; +} #define TAG(x) x##_1 |