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 "program/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 bool
  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       = hash_table_ctor(0, hash_table_string_hash, hash_table_string_compare);
  97
  98    this->consumer_interface_inputs
  99       = hash_table_ctor(0, hash_table_string_hash, hash_table_string_compare);
 100 }
 101
 102 void
 103 link_varyings::TearDown()
 104 {
 105    ralloc_free(this->mem_ctx);
 106    this->mem_ctx = NULL;
 107
 108    hash_table_dtor(this->consumer_inputs);
 109    this->consumer_inputs = NULL;
 110    hash_table_dtor(this->consumer_interface_inputs);
 111    this->consumer_interface_inputs = NULL;
 112 }
 113
 114 /**
 115  * Hash table callback function that counts the elements in the table
 116  *
 117  * \sa num_elements
 118  */
 119 static void
 120 ht_count_callback(const void *, void *, void *closure)
 121 {
 122    unsigned int *counter = (unsigned int *) closure;
 123
 124    (*counter)++;
 125 }
 126
 127 /**
 128  * Helper function to count the number of elements in a hash table.
 129  */
 130 static unsigned
 131 num_elements(hash_table *ht)
 132 {
 133    unsigned int counter = 0;
 134
 135    hash_table_call_foreach(ht, ht_count_callback, (void *) &counter);
 136
 137    return counter;
 138 }
 139
 140 /**
 141  * Helper function to determine whether a hash table is empty.
 142  */
 143 static bool
 144 is_empty(hash_table *ht)
 145 {
 146    return num_elements(ht) == 0;
 147 }
 148
 149 TEST_F(link_varyings, single_simple_input)
 150 {
 151    ir_variable *const v =
 152       new(mem_ctx) ir_variable(glsl_type::vec(4),
 153                                "a",
 154                                ir_var_shader_in);
 155
 156
 157    ir.push_tail(v);
 158
 159    linker::populate_consumer_input_sets(mem_ctx,
 160                                         &ir,
 161                                         consumer_inputs,
 162                                         consumer_interface_inputs,
 163                                         junk);
 164
 165    EXPECT_EQ((void *) v, hash_table_find(consumer_inputs, "a"));
 166    EXPECT_EQ(1u, num_elements(consumer_inputs));
 167    EXPECT_TRUE(is_empty(consumer_interface_inputs));
 168 }
 169
 170 TEST_F(link_varyings, gl_ClipDistance)
 171 {
 172    const glsl_type *const array_8_of_float =
 173       glsl_type::get_array_instance(glsl_type::vec(1), 8);
 174
 175    ir_variable *const clipdistance =
 176       new(mem_ctx) ir_variable(array_8_of_float,
 177                                "gl_ClipDistance",
 178                                ir_var_shader_in);
 179
 180    clipdistance->data.explicit_location = true;
 181    clipdistance->data.location = VARYING_SLOT_CLIP_DIST0;
 182    clipdistance->data.explicit_index = 0;
 183
 184    ir.push_tail(clipdistance);
 185
 186    linker::populate_consumer_input_sets(mem_ctx,
 187                                         &ir,
 188                                         consumer_inputs,
 189                                         consumer_interface_inputs,
 190                                         junk);
 191
 192    EXPECT_EQ(clipdistance, junk[VARYING_SLOT_CLIP_DIST0]);
 193    EXPECT_TRUE(is_empty(consumer_inputs));
 194    EXPECT_TRUE(is_empty(consumer_interface_inputs));
 195 }
 196
 197 TEST_F(link_varyings, single_interface_input)
 198 {
 199    ir_variable *const v =
 200       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 201                                simple_interface->fields.structure[0].name,
 202                                ir_var_shader_in);
 203
 204    v->init_interface_type(simple_interface);
 205
 206    ir.push_tail(v);
 207
 208    linker::populate_consumer_input_sets(mem_ctx,
 209                                         &ir,
 210                                         consumer_inputs,
 211                                         consumer_interface_inputs,
 212                                         junk);
 213    char *const full_name = interface_field_name(simple_interface);
 214
 215    EXPECT_EQ((void *) v, hash_table_find(consumer_interface_inputs, full_name));
 216    EXPECT_EQ(1u, num_elements(consumer_interface_inputs));
 217    EXPECT_TRUE(is_empty(consumer_inputs));
 218 }
 219
 220 TEST_F(link_varyings, one_interface_and_one_simple_input)
 221 {
 222    ir_variable *const v =
 223       new(mem_ctx) ir_variable(glsl_type::vec(4),
 224                                "a",
 225                                ir_var_shader_in);
 226
 227
 228    ir.push_tail(v);
 229
 230    ir_variable *const iface =
 231       new(mem_ctx) ir_variable(simple_interface->fields.structure[0].type,
 232                                simple_interface->fields.structure[0].name,
 233                                ir_var_shader_in);
 234
 235    iface->init_interface_type(simple_interface);
 236
 237    ir.push_tail(iface);
 238
 239    linker::populate_consumer_input_sets(mem_ctx,
 240                                         &ir,
 241                                         consumer_inputs,
 242                                         consumer_interface_inputs,
 243                                         junk);
 244
 245    char *const iface_field_name = interface_field_name(simple_interface);
 246
 247    EXPECT_EQ((void *) iface, hash_table_find(consumer_interface_inputs,
 248                                              iface_field_name));
 249    EXPECT_EQ(1u, num_elements(consumer_interface_inputs));
 250
 251    EXPECT_EQ((void *) v, hash_table_find(consumer_inputs, "a"));
 252    EXPECT_EQ(1u, num_elements(consumer_inputs));
 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 }