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/*
* Copyright © 2013 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.
*/
/**
* \file link_interface_blocks.cpp
* Linker support for GLSL's interface blocks.
*/
#include "ir.h"
#include "glsl_symbol_table.h"
#include "linker.h"
#include "main/macros.h"
bool
validate_intrastage_interface_blocks(struct gl_shader_program *prog,
const gl_shader **shader_list,
unsigned num_shaders)
{
glsl_symbol_table interfaces;
for (unsigned int i = 0; i < num_shaders; i++) {
if (shader_list[i] == NULL)
continue;
foreach_list(node, shader_list[i]->ir) {
ir_variable *var = ((ir_instruction *) node)->as_variable();
if (!var)
continue;
const glsl_type *iface_type = var->interface_type;
if (iface_type == NULL)
continue;
const glsl_type *old_iface_type =
interfaces.get_interface(iface_type->name,
(enum ir_variable_mode) var->mode);
if (old_iface_type == NULL) {
/* This is the first time we've seen the interface, so save
* it into our symbol table.
*/
interfaces.add_interface(iface_type->name, iface_type,
(enum ir_variable_mode) var->mode);
} else if (old_iface_type != iface_type) {
linker_error(prog, "definitions of interface block `%s' do not"
" match\n", iface_type->name);
return false;
}
}
}
return true;
}
bool
validate_interstage_interface_blocks(const gl_shader *producer,
const gl_shader *consumer)
{
glsl_symbol_table interfaces;
/* Add non-output interfaces from the consumer to the symbol table. */
foreach_list(node, consumer->ir) {
ir_variable *var = ((ir_instruction *) node)->as_variable();
if (!var || !var->interface_type || var->mode == ir_var_shader_out)
continue;
interfaces.add_interface(var->interface_type->name,
var->interface_type,
(enum ir_variable_mode) var->mode);
}
/* Verify that the producer's interfaces match. */
foreach_list(node, producer->ir) {
ir_variable *var = ((ir_instruction *) node)->as_variable();
if (!var || !var->interface_type || var->mode == ir_var_shader_in)
continue;
enum ir_variable_mode consumer_mode =
var->mode == ir_var_uniform ? ir_var_uniform : ir_var_shader_in;
const glsl_type *expected_type =
interfaces.get_interface(var->interface_type->name, consumer_mode);
/* The consumer doesn't use this output block. Ignore it. */
if (expected_type == NULL)
continue;
if (var->interface_type != expected_type)
return false;
}
return true;
}
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