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/*
* Copyright © 2012 Intel Corporation
*
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#include "main/core.h"
#include "ir.h"
#include "linker.h"
#include "ir_uniform.h"
#include "glsl_symbol_table.h"
#include "program/hash_table.h"
/* These functions are put in a "private" namespace instead of being marked
* static so that the unit tests can access them. See
* http://code.google.com/p/googletest/wiki/AdvancedGuide#Testing_Private_Code
*/
namespace linker {
gl_uniform_storage *
get_storage(gl_uniform_storage *storage, unsigned num_storage,
const char *name)
{
for (unsigned int i = 0; i < num_storage; i++) {
if (strcmp(name, storage[i].name) == 0)
return &storage[i];
}
return NULL;
}
void
copy_constant_to_storage(union gl_constant_value *storage,
const ir_constant *val,
const enum glsl_base_type base_type,
const unsigned int elements)
{
for (unsigned int i = 0; i < elements; i++) {
switch (base_type) {
case GLSL_TYPE_UINT:
storage[i].u = val->value.u[i];
break;
case GLSL_TYPE_INT:
case GLSL_TYPE_SAMPLER:
storage[i].i = val->value.i[i];
break;
case GLSL_TYPE_FLOAT:
storage[i].f = val->value.f[i];
break;
case GLSL_TYPE_BOOL:
storage[i].b = int(val->value.b[i]);
break;
case GLSL_TYPE_ARRAY:
case GLSL_TYPE_STRUCT:
case GLSL_TYPE_IMAGE:
case GLSL_TYPE_ATOMIC_UINT:
case GLSL_TYPE_INTERFACE:
case GLSL_TYPE_VOID:
case GLSL_TYPE_ERROR:
/* All other types should have already been filtered by other
* paths in the caller.
*/
assert(!"Should not get here.");
break;
}
}
}
void
set_uniform_binding(void *mem_ctx, gl_shader_program *prog,
const char *name, const glsl_type *type, int binding)
{
struct gl_uniform_storage *const storage =
get_storage(prog->UniformStorage, prog->NumUserUniformStorage, name);
if (storage == NULL) {
assert(storage != NULL);
return;
}
if (storage->type->is_sampler()) {
unsigned elements = MAX2(storage->array_elements, 1);
/* From section 4.4.4 of the GLSL 4.20 specification:
* "If the binding identifier is used with an array, the first element
* of the array takes the specified unit and each subsequent element
* takes the next consecutive unit."
*/
for (unsigned int i = 0; i < elements; i++) {
storage->storage[i].i = binding + i;
}
for (int sh = 0; sh < MESA_SHADER_STAGES; sh++) {
gl_shader *shader = prog->_LinkedShaders[sh];
if (shader && storage->sampler[sh].active) {
for (unsigned i = 0; i < elements; i++) {
unsigned index = storage->sampler[sh].index + i;
shader->SamplerUnits[index] = storage->storage[i].i;
}
}
}
} else if (storage->block_index != -1) {
/* This is a field of a UBO. val is the binding index. */
for (int i = 0; i < MESA_SHADER_STAGES; i++) {
int stage_index = prog->UniformBlockStageIndex[i][storage->block_index];
if (stage_index != -1) {
struct gl_shader *sh = prog->_LinkedShaders[i];
sh->UniformBlocks[stage_index].Binding = binding;
}
}
}
storage->initialized = true;
}
void
set_uniform_initializer(void *mem_ctx, gl_shader_program *prog,
const char *name, const glsl_type *type,
ir_constant *val)
{
if (type->is_record()) {
ir_constant *field_constant;
field_constant = (ir_constant *)val->components.get_head();
for (unsigned int i = 0; i < type->length; i++) {
const glsl_type *field_type = type->fields.structure[i].type;
const char *field_name = ralloc_asprintf(mem_ctx, "%s.%s", name,
type->fields.structure[i].name);
set_uniform_initializer(mem_ctx, prog, field_name,
field_type, field_constant);
field_constant = (ir_constant *)field_constant->next;
}
return;
} else if (type->is_array() && type->fields.array->is_record()) {
const glsl_type *const element_type = type->fields.array;
for (unsigned int i = 0; i < type->length; i++) {
const char *element_name = ralloc_asprintf(mem_ctx, "%s[%d]", name, i);
set_uniform_initializer(mem_ctx, prog, element_name,
element_type, val->array_elements[i]);
}
return;
}
struct gl_uniform_storage *const storage =
get_storage(prog->UniformStorage,
prog->NumUserUniformStorage,
name);
if (storage == NULL) {
assert(storage != NULL);
return;
}
if (val->type->is_array()) {
const enum glsl_base_type base_type =
val->array_elements[0]->type->base_type;
const unsigned int elements = val->array_elements[0]->type->components();
unsigned int idx = 0;
assert(val->type->length >= storage->array_elements);
for (unsigned int i = 0; i < storage->array_elements; i++) {
copy_constant_to_storage(& storage->storage[idx],
val->array_elements[i],
base_type,
elements);
idx += elements;
}
} else {
copy_constant_to_storage(storage->storage,
val,
val->type->base_type,
val->type->components());
if (storage->type->is_sampler()) {
for (int sh = 0; sh < MESA_SHADER_STAGES; sh++) {
gl_shader *shader = prog->_LinkedShaders[sh];
if (shader && storage->sampler[sh].active) {
unsigned index = storage->sampler[sh].index;
shader->SamplerUnits[index] = storage->storage[0].i;
}
}
}
}
storage->initialized = true;
}
}
void
link_set_uniform_initializers(struct gl_shader_program *prog)
{
void *mem_ctx = NULL;
for (unsigned int i = 0; i < MESA_SHADER_STAGES; i++) {
struct gl_shader *shader = prog->_LinkedShaders[i];
if (shader == NULL)
continue;
foreach_list(node, shader->ir) {
ir_variable *const var = ((ir_instruction *) node)->as_variable();
if (!var || var->data.mode != ir_var_uniform)
continue;
if (!mem_ctx)
mem_ctx = ralloc_context(NULL);
if (var->data.explicit_binding) {
linker::set_uniform_binding(mem_ctx, prog, var->name,
var->type, var->data.binding);
} else if (var->constant_value) {
linker::set_uniform_initializer(mem_ctx, prog, var->name,
var->type, var->constant_value);
}
}
}
ralloc_free(mem_ctx);
}
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