src/compiler/glsl/tests/varyings_test.cpp

   1 /*
   2  * Copyright © 2013 Intel Corporation
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   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
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   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.
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  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    link_varyings();
  55
  56    virtual void SetUp();
  57    virtual void TearDown();
  58
  59    char *interface_field_name(const glsl_type *iface, unsigned field = 0)
  60    {
  61       return ralloc_asprintf(mem_ctx,
  62                              "%s.%s",
  63                              iface->name,
  64                              iface->fields.structure[field].name);
  65    }
  66
  67    void *mem_ctx;
  68    exec_list ir;
  69    hash_table *consumer_inputs;
  70    hash_table *consumer_interface_inputs;
  71
  72    const glsl_type *simple_interface;
  73    ir_variable *junk[VARYING_SLOT_TESS_MAX];
  74 };
  75
  76 link_varyings::link_varyings()
  77 {
  78    static const glsl_struct_field f[] = {
  79       glsl_struct_field(glsl_type::vec(4), "v")
  80    };
  81
  82    this->simple_interface =
  83       glsl_type::get_interface_instance(f,
  84                                         ARRAY_SIZE(f),
  85                                         GLSL_INTERFACE_PACKING_STD140,
  86                                         "simple_interface");
  87 }
  88
  89 void
  90 link_varyings::SetUp()
  91 {
  92    this->mem_ctx = ralloc_context(NULL);
  93    this->ir.make_empty();
  94
  95    this->consumer_inputs =
  96          _mesa_hash_table_create(NULL, _mesa_key_hash_string,
  97                                  _mesa_key_string_equal);
  98
  99    this->consumer_interface_inputs =
 100          _mesa_hash_table_create(NULL, _mesa_key_hash_string,
 101                                  _mesa_key_string_equal);
 102 }
 103
 104 void
 105 link_varyings::TearDown()
 106 {
 107    ralloc_free(this->mem_ctx);
 108    this->mem_ctx = NULL;
 109
 110    _mesa_hash_table_destroy(this->consumer_inputs, NULL);
 111    this->consumer_inputs = NULL;
 112    _mesa_hash_table_destroy(this->consumer_interface_inputs, NULL);
 113    this->consumer_interface_inputs = NULL;
 114 }
 115
 116 TEST_F(link_varyings, single_simple_input)
 117 {
 118    ir_variable *const v =
 119       new(mem_ctx) ir_variable(glsl_type::vec(4),
 120                                "a",
 121                                ir_var_shader_in);
 122
 123
 124    ir.push_tail(v);
 125
 126    linker::populate_consumer_input_sets(mem_ctx,
 127                                         &ir,
 128                                         consumer_inputs,
 129                                         consumer_interface_inputs,
 130                                         junk);
 131
 132    hash_entry *entry = _mesa_hash_table_search(consumer_inputs, "a");
 133    EXPECT_EQ((void *) v, entry->data);
 134    EXPECT_EQ(1u, consumer_inputs->entries);
 135    EXPECT_TRUE(consumer_interface_inputs->entries == 0);
 136 }
 137
 138 TEST_F(link_varyings, gl_ClipDistance)
 139 {
 140    const glsl_type *const array_8_of_float =
 141       glsl_type::get_array_instance(glsl_type::vec(1), 8);
 142
 143    ir_variable *const clipdistance =
 144       new(mem_ctx) ir_variable(array_8_of_float,
 145                                "gl_ClipDistance",
 146                                ir_var_shader_in);
 147
 148    clipdistance->data.explicit_location = true;
 149    clipdistance->data.location = VARYING_SLOT_CLIP_DIST0;
 150    clipdistance->data.explicit_index = 0;
 151
 152    ir.push_tail(clipdistance);
 153
 154    linker::populate_consumer_input_sets(mem_ctx,
 155                                         &ir,
 156                                         consumer_inputs,
 157                                         consumer_interface_inputs,
 158                                         junk);
 159
 160    EXPECT_EQ(clipdistance, junk[VARYING_SLOT_CLIP_DIST0]);
 161    EXPECT_TRUE(consumer_inputs->entries == 0);
 162    EXPECT_TRUE(consumer_interface_inputs->entries == 0);
 163 }
 164
 165 TEST_F(link_varyings, gl_CullDistance)
 166 {
 167    const glsl_type *const array_8_of_float =
 168       glsl_type::get_array_instance(glsl_type::vec(1), 8);
 169
 170    ir_variable *const culldistance =
 171       new(mem_ctx) ir_variable(array_8_of_float,
 172                                "gl_CullDistance",
 173                                ir_var_shader_in);
 174
 175    culldistance->data.explicit_location = true;
 176    culldistance->data.location = VARYING_SLOT_CULL_DIST0;
 177    culldistance->data.explicit_index = 0;
 178
 179    ir.push_tail(culldistance);
 180
 181    linker::populate_consumer_input_sets(mem_ctx,
 182                                         &ir,
 183                                         consumer_inputs,
 184                                         consumer_interface_inputs,
 185                                         junk);
 186
 187    EXPECT_EQ(culldistance, junk[VARYING_SLOT_CULL_DIST0]);
 188    EXPECT_TRUE(consumer_inputs->entries == 0);
 189    EXPECT_TRUE(consumer_interface_inputs->entries == 0);
 190 }
 191
 192 TEST_F(link_varyings, single_interface_input)
 193 {
 194    ir_variable *const v =
 195       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 196                                simple_interface->fields.structure[0].name,
 197                                ir_var_shader_in);
 198
 199    v->init_interface_type(simple_interface);
 200
 201    ir.push_tail(v);
 202
 203    linker::populate_consumer_input_sets(mem_ctx,
 204                                         &ir,
 205                                         consumer_inputs,
 206                                         consumer_interface_inputs,
 207                                         junk);
 208    char *const full_name = interface_field_name(simple_interface);
 209
 210    hash_entry *entry = _mesa_hash_table_search(consumer_interface_inputs,
 211                                                full_name);
 212    EXPECT_EQ((void *) v, entry->data);
 213    EXPECT_EQ(1u, consumer_interface_inputs->entries);
 214    EXPECT_TRUE(consumer_inputs->entries == 0);
 215 }
 216
 217 TEST_F(link_varyings, one_interface_and_one_simple_input)
 218 {
 219    ir_variable *const v =
 220       new(mem_ctx) ir_variable(glsl_type::vec(4),
 221                                "a",
 222                                ir_var_shader_in);
 223
 224
 225    ir.push_tail(v);
 226
 227    ir_variable *const iface =
 228       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 229                                simple_interface->fields.structure[0].name,
 230                                ir_var_shader_in);
 231
 232    iface->init_interface_type(simple_interface);
 233
 234    ir.push_tail(iface);
 235
 236    linker::populate_consumer_input_sets(mem_ctx,
 237                                         &ir,
 238                                         consumer_inputs,
 239                                         consumer_interface_inputs,
 240                                         junk);
 241
 242    char *const iface_field_name = interface_field_name(simple_interface);
 243
 244    hash_entry *entry = _mesa_hash_table_search(consumer_interface_inputs,
 245                                                iface_field_name);
 246    EXPECT_EQ((void *) iface, entry->data);
 247    EXPECT_EQ(1u, consumer_interface_inputs->entries);
 248
 249    entry = _mesa_hash_table_search(consumer_inputs, "a");
 250    EXPECT_EQ((void *) v, entry->data);
 251    EXPECT_EQ(1u, consumer_inputs->entries);
 252 }
 253
 254 TEST_F(link_varyings, interface_field_doesnt_match_noninterface)
 255 {
 256    char *const iface_field_name = interface_field_name(simple_interface);
 257
 258    /* The input shader has a single input variable name "a.v"
 259     */
 260    ir_variable *const in_v =
 261       new(mem_ctx) ir_variable(glsl_type::vec(4),
 262                                iface_field_name,
 263                                ir_var_shader_in);
 264
 265    ir.push_tail(in_v);
 266
 267    linker::populate_consumer_input_sets(mem_ctx,
 268                                         &ir,
 269                                         consumer_inputs,
 270                                         consumer_interface_inputs,
 271                                         junk);
 272
 273    /* Create an output variable, "v", that is part of an interface block named
 274     * "a".  They should not match.
 275     */
 276    ir_variable *const out_v =
 277       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 278                                simple_interface->fields.structure[0].name,
 279                                ir_var_shader_in);
 280
 281    out_v->init_interface_type(simple_interface);
 282
 283    ir_variable *const match =
 284       linker::get_matching_input(mem_ctx,
 285                                  out_v,
 286                                  consumer_inputs,
 287                                  consumer_interface_inputs,
 288                                  junk);
 289
 290    EXPECT_EQ(NULL, match);
 291 }
 292
 293 TEST_F(link_varyings, interface_field_doesnt_match_noninterface_vice_versa)
 294 {
 295    char *const iface_field_name = interface_field_name(simple_interface);
 296
 297    /* In input shader has a single variable, "v", that is part of an interface
 298     * block named "a".
 299     */
 300    ir_variable *const in_v =
 301       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 302                                simple_interface->fields.structure[0].name,
 303                                ir_var_shader_in);
 304
 305    in_v->init_interface_type(simple_interface);
 306
 307    ir.push_tail(in_v);
 308
 309    linker::populate_consumer_input_sets(mem_ctx,
 310                                         &ir,
 311                                         consumer_inputs,
 312                                         consumer_interface_inputs,
 313                                         junk);
 314
 315    /* Create an output variable "a.v".  They should not match.
 316     */
 317    ir_variable *const out_v =
 318       new(mem_ctx) ir_variable(glsl_type::vec(4),
 319                                iface_field_name,
 320                                ir_var_shader_out);
 321
 322    ir_variable *const match =
 323       linker::get_matching_input(mem_ctx,
 324                                  out_v,
 325                                  consumer_inputs,
 326                                  consumer_interface_inputs,
 327                                  junk);
 328
 329    EXPECT_EQ(NULL, match);
 330 }