/**************************************************************************
*
* Copyright 2007 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Authors:
* Keith Whitwell <keithw@vmware.com>
* Brian Paul
*/
#include "util/u_math.h"
#include "util/u_memory.h"
#include "pipe/p_shader_tokens.h"
#include "draw_private.h"
#include "draw_context.h"
#include "draw_vs.h"
#include "tgsi/tgsi_parse.h"
#include "tgsi/tgsi_scan.h"
#include "tgsi/tgsi_exec.h"
struct exec_vertex_shader {
struct draw_vertex_shader base;
struct tgsi_exec_machine *machine;
};
static struct exec_vertex_shader *
exec_vertex_shader(struct draw_vertex_shader *vs)
{
return (struct exec_vertex_shader *)vs;
}
/* Not required for run_linear.
*/
static void
vs_exec_prepare(struct draw_vertex_shader *shader,
struct draw_context *draw)
{
struct exec_vertex_shader *evs = exec_vertex_shader(shader);
debug_assert(!draw->llvm);
/* Specify the vertex program to interpret/execute.
* Avoid rebinding when possible.
*/
if (evs->machine->Tokens != shader->state.tokens) {
tgsi_exec_machine_bind_shader(evs->machine,
shader->state.tokens,
draw->vs.tgsi.sampler,
draw->vs.tgsi.image,
draw->vs.tgsi.buffer);
}
}
/**
* Simplified vertex shader interface for the pt paths. Given the
* complexity of code-generating all the above operations together,
* it's time to try doing all the other stuff separately.
*/
static void
vs_exec_run_linear(struct draw_vertex_shader *shader,
const float (*input)[4],
float (*output)[4],
const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
unsigned count,
unsigned input_stride,
unsigned output_stride)
{
struct exec_vertex_shader *evs = exec_vertex_shader(shader);
struct tgsi_exec_machine *machine = evs->machine;
unsigned int i, j;
unsigned slot;
boolean clamp_vertex_color = shader->draw->rasterizer->clamp_vertex_color;
debug_assert(!shader->draw->llvm);
tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
constants, const_size);
if (shader->info.uses_instanceid) {
unsigned i = machine->SysSemanticToIndex[TGSI_SEMANTIC_INSTANCEID];
assert(i < ARRAY_SIZE(machine->SystemValue));
for (j = 0; j < TGSI_QUAD_SIZE; j++)
machine->SystemValue[i].xyzw[0].i[j] = shader->draw->instance_id;
}
for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);
/* Swizzle inputs.
*/
for (j = 0; j < max_vertices; j++) {
#if 0
debug_printf("%d) Input vert:\n", i + j);
for (slot = 0; slot < shader->info.num_inputs; slot++) {
debug_printf("\t%d: %f %f %f %f\n", slot,
input[slot][0],
input[slot][1],
input[slot][2],
input[slot][3]);
}
#endif
if (shader->info.uses_vertexid) {
unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID];
assert(vid < ARRAY_SIZE(machine->SystemValue));
machine->SystemValue[vid].xyzw[0].i[j] = i + j;
/* XXX this should include base vertex. Where to get it??? */
}
if (shader->info.uses_basevertex) {
unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_BASEVERTEX];
assert(vid < ARRAY_SIZE(machine->SystemValue));
machine->SystemValue[vid].xyzw[0].i[j] = 0;
/* XXX Where to get it??? */
}
if (shader->info.uses_vertexid_nobase) {
unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID_NOBASE];
assert(vid < ARRAY_SIZE(machine->SystemValue));
machine->SystemValue[vid].xyzw[0].i[j] = i + j;
}
for (slot = 0; slot < shader->info.num_inputs; slot++) {
#if 0
assert(!util_is_inf_or_nan(input[slot][0]));
assert(!util_is_inf_or_nan(input[slot][1]));
assert(!util_is_inf_or_nan(input[slot][2]));
assert(!util_is_inf_or_nan(input[slot][3]));
#endif
machine->Inputs[slot].xyzw[0].f[j] = input[slot][0];
machine->Inputs[slot].xyzw[1].f[j] = input[slot][1];
machine->Inputs[slot].xyzw[2].f[j] = input[slot][2];
machine->Inputs[slot].xyzw[3].f[j] = input[slot][3];
}
input = (const float (*)[4])((const char *)input + input_stride);
}
machine->NonHelperMask = (1 << max_vertices) - 1;
/* run interpreter */
tgsi_exec_machine_run(machine, 0);
/* Unswizzle all output results.
*/
for (j = 0; j < max_vertices; j++) {
for (slot = 0; slot < shader->info.num_outputs; slot++) {
enum tgsi_semantic name = shader->info.output_semantic_name[slot];
if (clamp_vertex_color &&
(name == TGSI_SEMANTIC_COLOR || name == TGSI_SEMANTIC_BCOLOR)) {
output[slot][0] = CLAMP(machine->Outputs[slot].xyzw[0].f[j], 0.0f, 1.0f);
output[slot][1] = CLAMP(machine->Outputs[slot].xyzw[1].f[j], 0.0f, 1.0f);
output[slot][2] = CLAMP(machine->Outputs[slot].xyzw[2].f[j], 0.0f, 1.0f);
output[slot][3] = CLAMP(machine->Outputs[slot].xyzw[3].f[j], 0.0f, 1.0f);
} else {
output[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
output[slot][1] = machine->Outputs[slot].xyzw[1].f[j];
output[slot][2] = machine->Outputs[slot].xyzw[2].f[j];
output[slot][3] = machine->Outputs[slot].xyzw[3].f[j];
}
}
#if 0
debug_printf("%d) Post xform vert:\n", i + j);
for (slot = 0; slot < shader->info.num_outputs; slot++) {
debug_printf("\t%d: %f %f %f %f\n", slot,
output[slot][0],
output[slot][1],
output[slot][2],
output[slot][3]);
assert(!util_is_inf_or_nan(output[slot][0]));
}
#endif
output = (float (*)[4])((char *)output + output_stride);
}
}
}
static void
vs_exec_delete(struct draw_vertex_shader *dvs)
{
FREE((void*) dvs->state.tokens);
FREE(dvs);
}
struct draw_vertex_shader *
draw_create_vs_exec(struct draw_context *draw,
const struct pipe_shader_state *state)
{
struct exec_vertex_shader *vs = CALLOC_STRUCT(exec_vertex_shader);
if (!vs)
return NULL;
/* we make a private copy of the tokens */
vs->base.state.tokens = tgsi_dup_tokens(state->tokens);
if (!vs->base.state.tokens) {
FREE(vs);
return NULL;
}
tgsi_scan_shader(state->tokens, &vs->base.info);
vs->base.state.stream_output = state->stream_output;
vs->base.draw = draw;
vs->base.prepare = vs_exec_prepare;
vs->base.run_linear = vs_exec_run_linear;
vs->base.delete = vs_exec_delete;
vs->base.create_variant = draw_vs_create_variant_generic;
vs->machine = draw->vs.tgsi.machine;
return &vs->base;
}