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llvmpipe: comments about blend generator

This commit is contained in:
Brian Paul 2009-08-19 13:14:15 -06:00 committed by José Fonseca
parent f586d9546b
commit 8329e59958
1 changed files with 11 additions and 5 deletions
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16
src/gallium/drivers/llvmpipe/lp_state_blend.c
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@ -45,6 +45,12 @@
#include "lp_bld_debug.h"
/**
* Generate blending code according to blend->base state.
* The blend function will look like:
* blend(mask, src_color, constant color, dst_color)
* dst_color will be modified and contain the result of the blend func.
*/
static void
blend_generate(struct llvmpipe_screen *screen,
struct lp_blend_state *blend)
@ -69,11 +75,11 @@ blend_generate(struct llvmpipe_screen *screen,
unsigned i;
type.value = 0;
type.floating = FALSE;
type.sign = FALSE;
type.norm = TRUE;
type.width = 8;
type.length = 16;
type.floating = FALSE; /* values are integers */
type.sign = FALSE; /* values are unsigned */
type.norm = TRUE; /* values are in [0,1] or [-1,1] */
type.width = 8; /* 8-bit ubyte values */
type.length = 16; /* 16 elements per vector */
vec_type = lp_build_vec_type(type);
int_vec_type = lp_build_int_vec_type(type);