Mesa (gallium-resource-sampling): tgsi: implement basic sampling
Zack Rusin
zack at kemper.freedesktop.org
Tue Jun 8 17:47:51 UTC 2010
Module: Mesa
Branch: gallium-resource-sampling
Commit: 063dcfcf5f5a1663e95482801d3646322d4337d5
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=063dcfcf5f5a1663e95482801d3646322d4337d5
Author: Zack Rusin <zackr at vmware.com>
Date: Tue Jun 8 13:47:27 2010 -0400
tgsi: implement basic sampling
---
src/gallium/auxiliary/tgsi/tgsi_exec.c | 207 ++++++++++++++++++++++++++++++++
src/gallium/auxiliary/tgsi/tgsi_exec.h | 3 +
2 files changed, 210 insertions(+), 0 deletions(-)
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index c15d970..4ffce1e 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -1719,6 +1719,160 @@ exec_txd(struct tgsi_exec_machine *mach,
}
+
+static void
+exec_sample(struct tgsi_exec_machine *mach,
+ const struct tgsi_full_instruction *inst,
+ uint modifier)
+{
+ const uint resource_unit = inst->Src[1].Register.Index;
+ const uint sampler_unit = inst->Src[2].Register.Index;
+ union tgsi_exec_channel r[4];
+ const union tgsi_exec_channel *lod = &ZeroVec;
+ enum tgsi_sampler_control control;
+ uint chan_index;
+
+ if (modifier != TEX_MODIFIER_NONE) {
+ if (modifier == TEX_MODIFIER_LOD_BIAS)
+ FETCH(&r[3], 3, CHAN_X);
+ else /*TEX_MODIFIER_LOD*/
+ FETCH(&r[3], 0, CHAN_W);
+
+ if (modifier != TEX_MODIFIER_PROJECTED) {
+ lod = &r[3];
+ }
+ }
+
+ if (modifier == TEX_MODIFIER_EXPLICIT_LOD) {
+ control = tgsi_sampler_lod_explicit;
+ } else {
+ control = tgsi_sampler_lod_bias;
+ }
+
+ switch (mach->Resources[resource_unit].Resource) {
+ case TGSI_TEXTURE_1D:
+ case TGSI_TEXTURE_SHADOW1D:
+ FETCH(&r[0], 0, CHAN_X);
+
+ if (modifier == TEX_MODIFIER_PROJECTED) {
+ micro_div(&r[0], &r[0], &r[3]);
+ }
+
+ fetch_texel(mach->Samplers[sampler_unit],
+ &r[0], &ZeroVec, &ZeroVec, lod, /* S, T, P, LOD */
+ control,
+ &r[0], &r[1], &r[2], &r[3]); /* R, G, B, A */
+ break;
+
+ case TGSI_TEXTURE_2D:
+ case TGSI_TEXTURE_RECT:
+ case TGSI_TEXTURE_SHADOW2D:
+ case TGSI_TEXTURE_SHADOWRECT:
+ FETCH(&r[0], 0, CHAN_X);
+ FETCH(&r[1], 0, CHAN_Y);
+ FETCH(&r[2], 0, CHAN_Z);
+
+ if (modifier == TEX_MODIFIER_PROJECTED) {
+ micro_div(&r[0], &r[0], &r[3]);
+ micro_div(&r[1], &r[1], &r[3]);
+ micro_div(&r[2], &r[2], &r[3]);
+ }
+
+ fetch_texel(mach->Samplers[sampler_unit],
+ &r[0], &r[1], &r[2], lod, /* S, T, P, LOD */
+ control,
+ &r[0], &r[1], &r[2], &r[3]); /* outputs */
+ break;
+
+ case TGSI_TEXTURE_3D:
+ case TGSI_TEXTURE_CUBE:
+ FETCH(&r[0], 0, CHAN_X);
+ FETCH(&r[1], 0, CHAN_Y);
+ FETCH(&r[2], 0, CHAN_Z);
+
+ if (modifier == TEX_MODIFIER_PROJECTED) {
+ micro_div(&r[0], &r[0], &r[3]);
+ micro_div(&r[1], &r[1], &r[3]);
+ micro_div(&r[2], &r[2], &r[3]);
+ }
+
+ fetch_texel(mach->Samplers[sampler_unit],
+ &r[0], &r[1], &r[2], lod,
+ control,
+ &r[0], &r[1], &r[2], &r[3]);
+ break;
+
+ default:
+ assert(0);
+ }
+
+ FOR_EACH_ENABLED_CHANNEL(*inst, chan_index) {
+ STORE(&r[chan_index], 0, chan_index);
+ }
+}
+
+static void
+exec_sample_d(struct tgsi_exec_machine *mach,
+ const struct tgsi_full_instruction *inst)
+{
+ const uint resource_unit = inst->Src[1].Register.Index;
+ const uint sampler_unit = inst->Src[2].Register.Index;
+ union tgsi_exec_channel r[4];
+ uint chan_index;
+ /*
+ * XXX: This is fake SAMPLE_D -- the derivatives are not taken into account, yet.
+ */
+
+ switch (mach->Resources[resource_unit].Resource) {
+ case TGSI_TEXTURE_1D:
+ case TGSI_TEXTURE_SHADOW1D:
+
+ FETCH(&r[0], 0, CHAN_X);
+
+ fetch_texel(mach->Samplers[sampler_unit],
+ &r[0], &ZeroVec, &ZeroVec, &ZeroVec, /* S, T, P, BIAS */
+ tgsi_sampler_lod_bias,
+ &r[0], &r[1], &r[2], &r[3]); /* R, G, B, A */
+ break;
+
+ case TGSI_TEXTURE_2D:
+ case TGSI_TEXTURE_RECT:
+ case TGSI_TEXTURE_SHADOW2D:
+ case TGSI_TEXTURE_SHADOWRECT:
+
+ FETCH(&r[0], 0, CHAN_X);
+ FETCH(&r[1], 0, CHAN_Y);
+ FETCH(&r[2], 0, CHAN_Z);
+
+ fetch_texel(mach->Samplers[sampler_unit],
+ &r[0], &r[1], &r[2], &ZeroVec, /* inputs */
+ tgsi_sampler_lod_bias,
+ &r[0], &r[1], &r[2], &r[3]); /* outputs */
+ break;
+
+ case TGSI_TEXTURE_3D:
+ case TGSI_TEXTURE_CUBE:
+
+ FETCH(&r[0], 0, CHAN_X);
+ FETCH(&r[1], 0, CHAN_Y);
+ FETCH(&r[2], 0, CHAN_Z);
+
+ fetch_texel(mach->Samplers[sampler_unit],
+ &r[0], &r[1], &r[2], &ZeroVec,
+ tgsi_sampler_lod_bias,
+ &r[0], &r[1], &r[2], &r[3]);
+ break;
+
+ default:
+ assert(0);
+ }
+
+ FOR_EACH_ENABLED_CHANNEL(*inst, chan_index) {
+ STORE(&r[chan_index], 0, chan_index);
+ }
+}
+
+
/**
* Evaluate a constant-valued coefficient at the position of the
* current quad.
@@ -1790,6 +1944,11 @@ static void
exec_declaration(struct tgsi_exec_machine *mach,
const struct tgsi_full_declaration *decl)
{
+ if (decl->Declaration.File == TGSI_FILE_RESOURCE) {
+ mach->Resources[decl->Range.First] = decl->Resource;
+ return;
+ }
+
if (mach->Processor == TGSI_PROCESSOR_FRAGMENT) {
if (decl->Declaration.File == TGSI_FILE_INPUT ||
decl->Declaration.File == TGSI_FILE_SYSTEM_VALUE) {
@@ -3464,6 +3623,54 @@ exec_instruction(
exec_endswitch(mach);
break;
+ case TGSI_OPCODE_LOAD:
+ assert(0);
+ break;
+
+ case TGSI_OPCODE_LOAD_MS:
+ assert(0);
+ break;
+
+ case TGSI_OPCODE_SAMPLE:
+ exec_sample(mach, inst, TEX_MODIFIER_NONE);
+ break;
+
+ case TGSI_OPCODE_SAMPLE_B:
+ exec_sample(mach, inst, TEX_MODIFIER_LOD_BIAS);
+ break;
+
+ case TGSI_OPCODE_SAMPLE_C:
+ assert(0);
+ break;
+
+ case TGSI_OPCODE_SAMPLE_C_LZ:
+ assert(0);
+ break;
+
+ case TGSI_OPCODE_SAMPLE_D:
+ exec_sample_d(mach, inst);
+ break;
+
+ case TGSI_OPCODE_SAMPLE_L:
+ exec_sample(mach, inst, TEX_MODIFIER_EXPLICIT_LOD);
+ break;
+
+ case TGSI_OPCODE_GATHER4:
+ assert(0);
+ break;
+
+ case TGSI_OPCODE_RESINFO:
+ assert(0);
+ break;
+
+ case TGSI_OPCODE_SAMPLE_POS:
+ assert(0);
+ break;
+
+ case TGSI_OPCODE_SAMPLE_INFO:
+ assert(0);
+ break;
+
default:
assert( 0 );
}
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.h b/src/gallium/auxiliary/tgsi/tgsi_exec.h
index d48c38f..74da01f 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.h
@@ -31,6 +31,7 @@
#include "pipe/p_compiler.h"
#include "pipe/p_state.h"
+#include "pipe/p_shader_tokens.h"
#if defined __cplusplus
extern "C" {
@@ -312,6 +313,8 @@ struct tgsi_exec_machine
struct tgsi_full_declaration *Declarations;
uint NumDeclarations;
+
+ struct tgsi_declaration_resource Resources[PIPE_MAX_SHADER_RESOURCES];
};
struct tgsi_exec_machine *
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