diff options
author | Brian Paul <brianp@vmware.com> | 2009-02-10 16:44:02 -0700 |
---|---|---|
committer | Brian Paul <brianp@vmware.com> | 2009-02-10 16:44:02 -0700 |
commit | 5340b6dff73a0a23531ce2a5f28fba8303adab6e (patch) | |
tree | b141fc3648568dd8b941c966059e6ed32a8bd0ad /src/gallium/drivers/nouveau/nouveau_util.h | |
parent | 9fd26daec24f21dbe17afcb2e2ab272667ee9a69 (diff) | |
parent | ee4c921b65fb76998711f3c40330505cbc49a0e0 (diff) |
Merge commit 'origin/gallium-master-merge'
This is the big merge of the gallium-0.2 branch into master.
gallium-master-merge was just the staging area for it.
Both gallium-0.2 and gallium-master-merge are considered closed now.
Conflicts:
progs/demos/Makefile
src/mesa/main/state.c
src/mesa/main/texenvprogram.c
Diffstat (limited to 'src/gallium/drivers/nouveau/nouveau_util.h')
-rw-r--r-- | src/gallium/drivers/nouveau/nouveau_util.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/gallium/drivers/nouveau/nouveau_util.h b/src/gallium/drivers/nouveau/nouveau_util.h new file mode 100644 index 0000000000..a10114beab --- /dev/null +++ b/src/gallium/drivers/nouveau/nouveau_util.h @@ -0,0 +1,91 @@ +#ifndef __NOUVEAU_UTIL_H__ +#define __NOUVEAU_UTIL_H__ + +/* Determine how many vertices can be pushed into the command stream. + * Where the remaining space isn't large enough to represent all verices, + * split the buffer at primitive boundaries. + * + * Returns a count of vertices that can be rendered, and an index to + * restart drawing at after a flush. + */ +static INLINE unsigned +nouveau_vbuf_split(unsigned remaining, unsigned overhead, unsigned vpp, + unsigned mode, unsigned start, unsigned count, + unsigned *restart) +{ + int max, adj = 0; + + max = remaining - overhead; + if (max < 0) + return 0; + + max *= vpp; + if (max >= count) + return count; + + switch (mode) { + case PIPE_PRIM_POINTS: + break; + case PIPE_PRIM_LINES: + max = max & 1; + break; + case PIPE_PRIM_TRIANGLES: + max = max - (max % 3); + break; + case PIPE_PRIM_QUADS: + max = max & 3; + break; + case PIPE_PRIM_LINE_LOOP: + case PIPE_PRIM_LINE_STRIP: + if (max < 2) + max = 0; + adj = 1; + break; + case PIPE_PRIM_POLYGON: + case PIPE_PRIM_TRIANGLE_STRIP: + case PIPE_PRIM_TRIANGLE_FAN: + if (max < 3) + max = 0; + adj = 2; + break; + case PIPE_PRIM_QUAD_STRIP: + if (max < 4) + max = 0; + adj = 3; + break; + default: + assert(0); + } + + *restart = start + max - adj; + return max; +} + +/* Integer base-2 logarithm, rounded towards zero. */ +static INLINE unsigned log2i(unsigned i) +{ + unsigned r = 0; + + if (i & 0xffff0000) { + i >>= 16; + r += 16; + } + if (i & 0x0000ff00) { + i >>= 8; + r += 8; + } + if (i & 0x000000f0) { + i >>= 4; + r += 4; + } + if (i & 0x0000000c) { + i >>= 2; + r += 2; + } + if (i & 0x00000002) { + r += 1; + } + return r; +} + +#endif |