src/compiler/glsl/tests/varyings_test.cpp

   1 /*
   2  * Copyright © 2013 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <gtest/gtest.h>
  24 #include "main/compiler.h"
  25 #include "main/mtypes.h"
  26 #include "main/macros.h"
  27 #include "util/ralloc.h"
  28 #include "ir.h"
  29 #include "util/hash_table.h"
  30
  31 /**
  32  * \file varyings_test.cpp
  33  *
  34  * Test various aspects of linking shader stage inputs and outputs.
  35  */
  36
  37 namespace linker {
  38 void
  39 populate_consumer_input_sets(void *mem_ctx, exec_list *ir,
  40                              hash_table *consumer_inputs,
  41                              hash_table *consumer_interface_inputs,
  42                              ir_variable *consumer_inputs_with_locations[VARYING_SLOT_MAX]);
  43
  44 ir_variable *
  45 get_matching_input(void *mem_ctx,
  46                    const ir_variable *output_var,
  47                    hash_table *consumer_inputs,
  48                    hash_table *consumer_interface_inputs,
  49                    ir_variable *consumer_inputs_with_locations[VARYING_SLOT_MAX]);
  50 }
  51
  52 class link_varyings : public ::testing::Test {
  53 public:
  54    virtual void SetUp();
  55    virtual void TearDown();
  56
  57    char *interface_field_name(const glsl_type *iface, unsigned field = 0)
  58    {
  59       return ralloc_asprintf(mem_ctx,
  60                              "%s.%s",
  61                              iface->name,
  62                              iface->fields.structure[field].name);
  63    }
  64
  65    void *mem_ctx;
  66    exec_list ir;
  67    hash_table *consumer_inputs;
  68    hash_table *consumer_interface_inputs;
  69
  70    const glsl_type *simple_interface;
  71    ir_variable *junk[VARYING_SLOT_TESS_MAX];
  72 };
  73
  74 void
  75 link_varyings::SetUp()
  76 {
  77    glsl_type_singleton_init_or_ref();
  78
  79    this->mem_ctx = ralloc_context(NULL);
  80    this->ir.make_empty();
  81
  82    this->consumer_inputs =
  83          _mesa_hash_table_create(NULL, _mesa_key_hash_string,
  84                                  _mesa_key_string_equal);
  85
  86    this->consumer_interface_inputs =
  87          _mesa_hash_table_create(NULL, _mesa_key_hash_string,
  88                                  _mesa_key_string_equal);
  89
  90    /* Needs to happen after glsl type initialization */
  91    static const glsl_struct_field f[] = {
  92       glsl_struct_field(glsl_type::vec(4), "v")
  93    };
  94
  95    this->simple_interface =
  96       glsl_type::get_interface_instance(f,
  97                                         ARRAY_SIZE(f),
  98                                         GLSL_INTERFACE_PACKING_STD140,
  99                                         false,
 100                                         "simple_interface");
 101 }
 102
 103 void
 104 link_varyings::TearDown()
 105 {
 106    ralloc_free(this->mem_ctx);
 107    this->mem_ctx = NULL;
 108
 109    _mesa_hash_table_destroy(this->consumer_inputs, NULL);
 110    this->consumer_inputs = NULL;
 111    _mesa_hash_table_destroy(this->consumer_interface_inputs, NULL);
 112    this->consumer_interface_inputs = NULL;
 113
 114    glsl_type_singleton_decref();
 115 }
 116
 117 TEST_F(link_varyings, single_simple_input)
 118 {
 119    ir_variable *const v =
 120       new(mem_ctx) ir_variable(glsl_type::vec(4),
 121                                "a",
 122                                ir_var_shader_in);
 123
 124
 125    ir.push_tail(v);
 126
 127    linker::populate_consumer_input_sets(mem_ctx,
 128                                         &ir,
 129                                         consumer_inputs,
 130                                         consumer_interface_inputs,
 131                                         junk);
 132
 133    hash_entry *entry = _mesa_hash_table_search(consumer_inputs, "a");
 134    EXPECT_EQ((void *) v, entry->data);
 135    EXPECT_EQ(1u, consumer_inputs->entries);
 136    EXPECT_TRUE(consumer_interface_inputs->entries == 0);
 137 }
 138
 139 TEST_F(link_varyings, gl_ClipDistance)
 140 {
 141    const glsl_type *const array_8_of_float =
 142       glsl_type::get_array_instance(glsl_type::vec(1), 8);
 143
 144    ir_variable *const clipdistance =
 145       new(mem_ctx) ir_variable(array_8_of_float,
 146                                "gl_ClipDistance",
 147                                ir_var_shader_in);
 148
 149    clipdistance->data.explicit_location = true;
 150    clipdistance->data.location = VARYING_SLOT_CLIP_DIST0;
 151    clipdistance->data.explicit_index = 0;
 152
 153    ir.push_tail(clipdistance);
 154
 155    linker::populate_consumer_input_sets(mem_ctx,
 156                                         &ir,
 157                                         consumer_inputs,
 158                                         consumer_interface_inputs,
 159                                         junk);
 160
 161    EXPECT_EQ(clipdistance, junk[VARYING_SLOT_CLIP_DIST0]);
 162    EXPECT_TRUE(consumer_inputs->entries == 0);
 163    EXPECT_TRUE(consumer_interface_inputs->entries == 0);
 164 }
 165
 166 TEST_F(link_varyings, gl_CullDistance)
 167 {
 168    const glsl_type *const array_8_of_float =
 169       glsl_type::get_array_instance(glsl_type::vec(1), 8);
 170
 171    ir_variable *const culldistance =
 172       new(mem_ctx) ir_variable(array_8_of_float,
 173                                "gl_CullDistance",
 174                                ir_var_shader_in);
 175
 176    culldistance->data.explicit_location = true;
 177    culldistance->data.location = VARYING_SLOT_CULL_DIST0;
 178    culldistance->data.explicit_index = 0;
 179
 180    ir.push_tail(culldistance);
 181
 182    linker::populate_consumer_input_sets(mem_ctx,
 183                                         &ir,
 184                                         consumer_inputs,
 185                                         consumer_interface_inputs,
 186                                         junk);
 187
 188    EXPECT_EQ(culldistance, junk[VARYING_SLOT_CULL_DIST0]);
 189    EXPECT_TRUE(consumer_inputs->entries == 0);
 190    EXPECT_TRUE(consumer_interface_inputs->entries == 0);
 191 }
 192
 193 TEST_F(link_varyings, single_interface_input)
 194 {
 195    ir_variable *const v =
 196       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 197                                simple_interface->fields.structure[0].name,
 198                                ir_var_shader_in);
 199
 200    v->init_interface_type(simple_interface);
 201
 202    ir.push_tail(v);
 203
 204    linker::populate_consumer_input_sets(mem_ctx,
 205                                         &ir,
 206                                         consumer_inputs,
 207                                         consumer_interface_inputs,
 208                                         junk);
 209    char *const full_name = interface_field_name(simple_interface);
 210
 211    hash_entry *entry = _mesa_hash_table_search(consumer_interface_inputs,
 212                                                full_name);
 213    EXPECT_EQ((void *) v, entry->data);
 214    EXPECT_EQ(1u, consumer_interface_inputs->entries);
 215    EXPECT_TRUE(consumer_inputs->entries == 0);
 216 }
 217
 218 TEST_F(link_varyings, one_interface_and_one_simple_input)
 219 {
 220    ir_variable *const v =
 221       new(mem_ctx) ir_variable(glsl_type::vec(4),
 222                                "a",
 223                                ir_var_shader_in);
 224
 225
 226    ir.push_tail(v);
 227
 228    ir_variable *const iface =
 229       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 230                                simple_interface->fields.structure[0].name,
 231                                ir_var_shader_in);
 232
 233    iface->init_interface_type(simple_interface);
 234
 235    ir.push_tail(iface);
 236
 237    linker::populate_consumer_input_sets(mem_ctx,
 238                                         &ir,
 239                                         consumer_inputs,
 240                                         consumer_interface_inputs,
 241                                         junk);
 242
 243    char *const iface_field_name = interface_field_name(simple_interface);
 244
 245    hash_entry *entry = _mesa_hash_table_search(consumer_interface_inputs,
 246                                                iface_field_name);
 247    EXPECT_EQ((void *) iface, entry->data);
 248    EXPECT_EQ(1u, consumer_interface_inputs->entries);
 249
 250    entry = _mesa_hash_table_search(consumer_inputs, "a");
 251    EXPECT_EQ((void *) v, entry->data);
 252    EXPECT_EQ(1u, consumer_inputs->entries);
 253 }
 254
 255 TEST_F(link_varyings, interface_field_doesnt_match_noninterface)
 256 {
 257    char *const iface_field_name = interface_field_name(simple_interface);
 258
 259    /* The input shader has a single input variable name "a.v"
 260     */
 261    ir_variable *const in_v =
 262       new(mem_ctx) ir_variable(glsl_type::vec(4),
 263                                iface_field_name,
 264                                ir_var_shader_in);
 265
 266    ir.push_tail(in_v);
 267
 268    linker::populate_consumer_input_sets(mem_ctx,
 269                                         &ir,
 270                                         consumer_inputs,
 271                                         consumer_interface_inputs,
 272                                         junk);
 273
 274    /* Create an output variable, "v", that is part of an interface block named
 275     * "a".  They should not match.
 276     */
 277    ir_variable *const out_v =
 278       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 279                                simple_interface->fields.structure[0].name,
 280                                ir_var_shader_in);
 281
 282    out_v->init_interface_type(simple_interface);
 283
 284    ir_variable *const match =
 285       linker::get_matching_input(mem_ctx,
 286                                  out_v,
 287                                  consumer_inputs,
 288                                  consumer_interface_inputs,
 289                                  junk);
 290
 291    EXPECT_EQ(NULL, match);
 292 }
 293
 294 TEST_F(link_varyings, interface_field_doesnt_match_noninterface_vice_versa)
 295 {
 296    char *const iface_field_name = interface_field_name(simple_interface);
 297
 298    /* In input shader has a single variable, "v", that is part of an interface
 299     * block named "a".
 300     */
 301    ir_variable *const in_v =
 302       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 303                                simple_interface->fields.structure[0].name,
 304                                ir_var_shader_in);
 305
 306    in_v->init_interface_type(simple_interface);
 307
 308    ir.push_tail(in_v);
 309
 310    linker::populate_consumer_input_sets(mem_ctx,
 311                                         &ir,
 312                                         consumer_inputs,
 313                                         consumer_interface_inputs,
 314                                         junk);
 315
 316    /* Create an output variable "a.v".  They should not match.
 317     */
 318    ir_variable *const out_v =
 319       new(mem_ctx) ir_variable(glsl_type::vec(4),
 320                                iface_field_name,
 321                                ir_var_shader_out);
 322
 323    ir_variable *const match =
 324       linker::get_matching_input(mem_ctx,
 325                                  out_v,
 326                                  consumer_inputs,
 327                                  consumer_interface_inputs,
 328                                  junk);
 329
 330    EXPECT_EQ(NULL, match);
 331 }