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draw: preserve specular alpha when flatshading -- may be FOGC

This commit is contained in:
Keith Whitwell 2008-06-11 18:46:26 +01:00
parent d45e99060d
commit 807f8f177b
1 changed files with 28 additions and 2 deletions
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30
src/gallium/auxiliary/draw/draw_pipe_flatshade.c
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@ -40,9 +40,19 @@ struct flat_stage
struct draw_stage stage;
uint num_color_attribs;
uint color_attribs[4]; /* front/back primary/secondary colors */
uint color_attribs[2]; /* front/back primary colors */
uint num_spec_attribs;
uint spec_attribs[2]; /* front/back secondary colors */
};
#define COPY_3FV( DST, SRC ) \
do { \
(DST)[0] = (SRC)[0]; \
(DST)[1] = (SRC)[1]; \
(DST)[2] = (SRC)[2]; \
} while (0)
static INLINE struct flat_stage *
flat_stage(struct draw_stage *stage)
@ -58,10 +68,16 @@ static INLINE void copy_colors( struct draw_stage *stage,
{
const struct flat_stage *flat = flat_stage(stage);
uint i;
for (i = 0; i < flat->num_color_attribs; i++) {
const uint attr = flat->color_attribs[i];
COPY_4FV(dst->data[attr], src->data[attr]);
}
for (i = 0; i < flat->num_spec_attribs; i++) {
const uint attr = flat->spec_attribs[i];
COPY_3FV(dst->data[attr], src->data[attr]);
}
}
@ -78,6 +94,12 @@ static INLINE void copy_colors2( struct draw_stage *stage,
COPY_4FV(dst0->data[attr], src->data[attr]);
COPY_4FV(dst1->data[attr], src->data[attr]);
}
for (i = 0; i < flat->num_spec_attribs; i++) {
const uint attr = flat->spec_attribs[i];
COPY_3FV(dst0->data[attr], src->data[attr]);
COPY_3FV(dst1->data[attr], src->data[attr]);
}
}
@ -164,10 +186,14 @@ static void flatshade_init_state( struct draw_stage *stage )
/* Find which vertex shader outputs are colors, make a list */
flat->num_color_attribs = 0;
flat->num_spec_attribs = 0;
for (i = 0; i < vs->info.num_outputs; i++) {
if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_COLOR ||
vs->info.output_semantic_name[i] == TGSI_SEMANTIC_BCOLOR) {
flat->color_attribs[flat->num_color_attribs++] = i;
if (vs->info.output_semantic_index[i] == 0)
flat->color_attribs[flat->num_color_attribs++] = i;
else
flat->spec_attribs[flat->num_spec_attribs++] = i;
}
}