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tgsi: Add code for handling lodq opcode

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This introduces new vfunc in tgsi_sampler just for this opcode. I
decided against extending get_samples vfunc to return the mipmap level
and LOD - the function's prototype is already too scary and doing the
sampling for textureQueryLod would be a waste of time.

v2:
  - splitted too long lines

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Krzesimir Nowak 2015-09-10 14:15:58 +02:00 • committed by Brian Paul
parent d71a3be860
commit 263d4a7406
2 changed files with 56 additions and 0 deletions
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46
src/gallium/auxiliary/tgsi/tgsi_exec.c
View file

@ -2132,6 +2132,46 @@ exec_tex(struct tgsi_exec_machine *mach,
}
}
static void
exec_lodq(struct tgsi_exec_machine *mach,
const struct tgsi_full_instruction *inst)
{
uint unit;
int dim;
int i;
union tgsi_exec_channel coords[4];
const union tgsi_exec_channel *args[Elements(coords)];
union tgsi_exec_channel r[2];
unit = fetch_sampler_unit(mach, inst, 1);
dim = tgsi_util_get_texture_coord_dim(inst->Texture.Texture, NULL);
assert(dim <= Elements(coords));
/* fetch coordinates */
for (i = 0; i < dim; i++) {
FETCH(&coords[i], 0, TGSI_CHAN_X + i);
args[i] = &coords[i];
}
for (i = dim; i < Elements(coords); i++) {
args[i] = &ZeroVec;
}
mach->Sampler->query_lod(mach->Sampler, unit, unit,
args[0]->f,
args[1]->f,
args[2]->f,
args[3]->f,
tgsi_sampler_lod_none,
r[0].f,
r[1].f);
if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_X) {
store_dest(mach, &r[0], &inst->Dst[0], inst, TGSI_CHAN_X,
TGSI_EXEC_DATA_FLOAT);
}
if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_Y) {
store_dest(mach, &r[1], &inst->Dst[0], inst, TGSI_CHAN_Y,
TGSI_EXEC_DATA_FLOAT);
}
}
static void
exec_txd(struct tgsi_exec_machine *mach,
@ -4378,6 +4418,12 @@ exec_instruction(
exec_tex(mach, inst, TEX_MODIFIER_GATHER, 2);
break;
case TGSI_OPCODE_LODQ:
/* src[0] = texcoord */
/* src[1] = sampler unit */
exec_lodq(mach, inst);
break;
case TGSI_OPCODE_UP2H:
assert (0);
break;

10
src/gallium/auxiliary/tgsi/tgsi_exec.h
View file

@ -138,6 +138,16 @@ struct tgsi_sampler
const int j[TGSI_QUAD_SIZE], const int k[TGSI_QUAD_SIZE],
const int lod[TGSI_QUAD_SIZE], const int8_t offset[3],
float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
void (*query_lod)(struct tgsi_sampler *tgsi_sampler,
const unsigned sview_index,
const unsigned sampler_index,
const float s[TGSI_QUAD_SIZE],
const float t[TGSI_QUAD_SIZE],
const float p[TGSI_QUAD_SIZE],
const float c0[TGSI_QUAD_SIZE],
const enum tgsi_sampler_control control,
float mipmap[TGSI_QUAD_SIZE],
float lod[TGSI_QUAD_SIZE]);
};
#define TGSI_EXEC_NUM_TEMPS 4096