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softpipe: document MAX_QUADS

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This commit is contained in:
Brian Paul 2010-04-18 08:51:16 -06:00
parent 24ceef7a69
commit b806c3056f
1 changed files with 6 additions and 1 deletions
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7
src/gallium/drivers/softpipe/sp_setup.c
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@ -59,6 +59,11 @@ struct edge {
};
/**
* Max number of quads (2x2 pixel blocks) to process per batch.
* This can't be arbitrarily increased since we depend on some 32-bit
* bitmasks (two bits per quad).
*/
#define MAX_QUADS 16
@ -204,7 +209,7 @@ static INLINE int block_x( int x )
*/
static void flush_spans( struct setup_context *setup )
{
const int step = 16;
const int step = MAX_QUADS;
const int xleft0 = setup->span.left[0];
const int xleft1 = setup->span.left[1];
const int xright0 = setup->span.right[0];