/*
* 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.
*/
#include <gtest/gtest.h>
#include "main/compiler.h"
#include "main/mtypes.h"
#include "main/macros.h"
#include "util/ralloc.h"
#include "ir.h"
#include "program/hash_table.h"
/**
* \file varyings_test.cpp
*
* Test various aspects of linking shader stage inputs and outputs.
*/
namespace linker {
bool
populate_consumer_input_sets(void *mem_ctx, exec_list *ir,
hash_table *consumer_inputs,
hash_table *consumer_interface_inputs,
ir_variable *consumer_inputs_with_locations[VARYING_SLOT_MAX]);
ir_variable *
get_matching_input(void *mem_ctx,
const ir_variable *output_var,
hash_table *consumer_inputs,
hash_table *consumer_interface_inputs,
ir_variable *consumer_inputs_with_locations[VARYING_SLOT_MAX]);
}
class link_varyings : public ::testing::Test {
public:
link_varyings();
virtual void SetUp();
virtual void TearDown();
char *interface_field_name(const glsl_type *iface, unsigned field = 0)
{
return ralloc_asprintf(mem_ctx,
"%s.%s",
iface->name,
iface->fields.structure[field].name);
}
void *mem_ctx;
exec_list ir;
hash_table *consumer_inputs;
hash_table *consumer_interface_inputs;
const glsl_type *simple_interface;
ir_variable *junk[VARYING_SLOT_MAX];
};
link_varyings::link_varyings()
{
static const glsl_struct_field f[] = {
{
glsl_type::vec(4),
"v",
false,
0,
0,
0,
0
}
};
this->simple_interface =
glsl_type::get_interface_instance(f,
ARRAY_SIZE(f),
GLSL_INTERFACE_PACKING_STD140,
"simple_interface");
}
void
link_varyings::SetUp()
{
this->mem_ctx = ralloc_context(NULL);
this->ir.make_empty();
this->consumer_inputs
= hash_table_ctor(0, hash_table_string_hash, hash_table_string_compare);
this->consumer_interface_inputs
= hash_table_ctor(0, hash_table_string_hash, hash_table_string_compare);
}
void
link_varyings::TearDown()
{
ralloc_free(this->mem_ctx);
this->mem_ctx = NULL;
hash_table_dtor(this->consumer_inputs);
this->consumer_inputs = NULL;
hash_table_dtor(this->consumer_interface_inputs);
this->consumer_interface_inputs = NULL;
}
/**
* Hash table callback function that counts the elements in the table
*
* \sa num_elements
*/
static void
ht_count_callback(const void *, void *, void *closure)
{
unsigned int *counter = (unsigned int *) closure;
(*counter)++;
}
/**
* Helper function to count the number of elements in a hash table.
*/
static unsigned
num_elements(hash_table *ht)
{
unsigned int counter = 0;
hash_table_call_foreach(ht, ht_count_callback, (void *) &counter);
return counter;
}
/**
* Helper function to determine whether a hash table is empty.
*/
static bool
is_empty(hash_table *ht)
{
return num_elements(ht) == 0;
}
TEST_F(link_varyings, single_simple_input)
{
ir_variable *const v =
new(mem_ctx) ir_variable(glsl_type::vec(4),
"a",
ir_var_shader_in);
ir.push_tail(v);
ASSERT_TRUE(linker::populate_consumer_input_sets(mem_ctx,
&ir,
consumer_inputs,
consumer_interface_inputs,
junk));
EXPECT_EQ((void *) v, hash_table_find(consumer_inputs, "a"));
EXPECT_EQ(1u, num_elements(consumer_inputs));
EXPECT_TRUE(is_empty(consumer_interface_inputs));
}
TEST_F(link_varyings, gl_ClipDistance)
{
const glsl_type *const array_8_of_float =
glsl_type::get_array_instance(glsl_type::vec(1), 8);
ir_variable *const clipdistance =
new(mem_ctx) ir_variable(array_8_of_float,
"gl_ClipDistance",
ir_var_shader_in);
clipdistance->data.explicit_location = true;
clipdistance->data.location = VARYING_SLOT_CLIP_DIST0;
clipdistance->data.explicit_index = 0;
ir.push_tail(clipdistance);
ASSERT_TRUE(linker::populate_consumer_input_sets(mem_ctx,
&ir,
consumer_inputs,
consumer_interface_inputs,
junk));
EXPECT_EQ(clipdistance, junk[VARYING_SLOT_CLIP_DIST0]);
EXPECT_TRUE(is_empty(consumer_inputs));
EXPECT_TRUE(is_empty(consumer_interface_inputs));
}
TEST_F(link_varyings, single_interface_input)
{
ir_variable *const v =
new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
simple_interface->fields.structure[0].name,
ir_var_shader_in);
v->init_interface_type(simple_interface);
ir.push_tail(v);
ASSERT_TRUE(linker::populate_consumer_input_sets(mem_ctx,
&ir,
consumer_inputs,
consumer_interface_inputs,
junk));
char *const full_name = interface_field_name(simple_interface);
EXPECT_EQ((void *) v, hash_table_find(consumer_interface_inputs, full_name));
EXPECT_EQ(1u, num_elements(consumer_interface_inputs));
EXPECT_TRUE(is_empty(consumer_inputs));
}
TEST_F(link_varyings, one_interface_and_one_simple_input)
{
ir_variable *const v =
new(mem_ctx) ir_variable(glsl_type::vec(4),
"a",
ir_var_shader_in);
ir.push_tail(v);
ir_variable *const iface =
new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
simple_interface->fields.structure[0].name,
ir_var_shader_in);
iface->init_interface_type(simple_interface);
ir.push_tail(iface);
ASSERT_TRUE(linker::populate_consumer_input_sets(mem_ctx,
&ir,
consumer_inputs,
consumer_interface_inputs,
junk));
char *const iface_field_name = interface_field_name(simple_interface);
EXPECT_EQ((void *) iface, hash_table_find(consumer_interface_inputs,
iface_field_name));
EXPECT_EQ(1u, num_elements(consumer_interface_inputs));
EXPECT_EQ((void *) v, hash_table_find(consumer_inputs, "a"));
EXPECT_EQ(1u, num_elements(consumer_inputs));
}
TEST_F(link_varyings, invalid_interface_input)
{
ir_variable *const v =
new(mem_ctx) ir_variable(simple_interface,
"named_interface",
ir_var_shader_in);
ASSERT_EQ(simple_interface, v->get_interface_type());
ir.push_tail(v);
EXPECT_FALSE(linker::populate_consumer_input_sets(mem_ctx,
&ir,
consumer_inputs,
consumer_interface_inputs,
junk));
}
TEST_F(link_varyings, interface_field_doesnt_match_noninterface)
{
char *const iface_field_name = interface_field_name(simple_interface);
/* The input shader has a single input variable name "a.v"
*/
ir_variable *const in_v =
new(mem_ctx) ir_variable(glsl_type::vec(4),
iface_field_name,
ir_var_shader_in);
ir.push_tail(in_v);
ASSERT_TRUE(linker::populate_consumer_input_sets(mem_ctx,
&ir,
consumer_inputs,
consumer_interface_inputs,
junk));
/* Create an output variable, "v", that is part of an interface block named
* "a". They should not match.
*/
ir_variable *const out_v =
new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
simple_interface->fields.structure[0].name,
ir_var_shader_in);
out_v->init_interface_type(simple_interface);
ir_variable *const match =
linker::get_matching_input(mem_ctx,
out_v,
consumer_inputs,
consumer_interface_inputs,
junk);
EXPECT_EQ(NULL, match);
}
TEST_F(link_varyings, interface_field_doesnt_match_noninterface_vice_versa)
{
char *const iface_field_name = interface_field_name(simple_interface);
/* In input shader has a single variable, "v", that is part of an interface
* block named "a".
*/
ir_variable *const in_v =
new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
simple_interface->fields.structure[0].name,
ir_var_shader_in);
in_v->init_interface_type(simple_interface);
ir.push_tail(in_v);
ASSERT_TRUE(linker::populate_consumer_input_sets(mem_ctx,
&ir,
consumer_inputs,
consumer_interface_inputs,
junk));
/* Create an output variable "a.v". They should not match.
*/
ir_variable *const out_v =
new(mem_ctx) ir_variable(glsl_type::vec(4),
iface_field_name,
ir_var_shader_out);
ir_variable *const match =
linker::get_matching_input(mem_ctx,
out_v,
consumer_inputs,
consumer_interface_inputs,
junk);
EXPECT_EQ(NULL, match);
}