git.sesse.net Git - movit/blob - test_util.cpp

   1 #include <assert.h>
   2 #include <math.h>
   3 #include <stdio.h>
   4 #include <algorithm>
   5 #include <epoxy/gl.h>
   6 #include <gtest/gtest.h>
   7 #include <gtest/gtest-message.h>
   8
   9 #include "flat_input.h"
  10 #include "init.h"
  11 #include "resource_pool.h"
  12 #include "test_util.h"
  13 #include "util.h"
  14
  15 using namespace std;
  16
  17 namespace movit {
  18
  19 class Input;
  20
  21 namespace {
  22
  23 // Not thread-safe, but this isn't a big problem for testing.
  24 ResourcePool *get_static_pool()
  25 {
  26         static ResourcePool *resource_pool = nullptr;
  27         if (!resource_pool) {
  28                 resource_pool = new ResourcePool();
  29         }
  30         return resource_pool;
  31 }
  32
  33 // Flip upside-down to compensate for different origin.
  34 template<class T>
  35 void vertical_flip(T *data, unsigned width, unsigned height)
  36 {
  37         for (unsigned y = 0; y < height / 2; ++y) {
  38                 unsigned flip_y = height - y - 1;
  39                 for (unsigned x = 0; x < width; ++x) {
  40                         swap(data[y * width + x], data[flip_y * width + x]);
  41                 }
  42         }
  43 }
  44
  45 void init_movit_for_test()
  46 {
  47        CHECK(init_movit(".", MOVIT_DEBUG_OFF));
  48 }
  49
  50 }  // namespace
  51
  52 EffectChainTester::EffectChainTester(const float *data, unsigned width, unsigned height,
  53                                      MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve,
  54                                      GLenum framebuffer_format)
  55         : chain(width, height, get_static_pool()),
  56           width(width),
  57           height(height),
  58           framebuffer_format(framebuffer_format),
  59           output_added(false),
  60           finalized(false)
  61 {
  62         init_movit_for_test();
  63
  64         if (data != nullptr) {
  65                 add_input(data, pixel_format, color_space, gamma_curve);
  66         }
  67 }
  68
  69 EffectChainTester::~EffectChainTester()
  70 {
  71 }
  72
  73 Input *EffectChainTester::add_input(const float *data, MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve, int input_width, int input_height)
  74 {
  75         ImageFormat format;
  76         format.color_space = color_space;
  77         format.gamma_curve = gamma_curve;
  78
  79         if (input_width == -1) {
  80                 input_width = width;
  81         }
  82         if (input_height == -1) {
  83                 input_height = height;
  84         }
  85
  86         FlatInput *input = new FlatInput(format, pixel_format, GL_FLOAT, input_width, input_height);
  87         input->set_pixel_data(data);
  88         chain.add_input(input);
  89         return input;
  90 }
  91
  92 Input *EffectChainTester::add_input(const fp16_int_t *data, MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve, int input_width, int input_height)
  93 {
  94         ImageFormat format;
  95         format.color_space = color_space;
  96         format.gamma_curve = gamma_curve;
  97
  98         if (input_width == -1) {
  99                 input_width = width;
 100         }
 101         if (input_height == -1) {
 102                 input_height = height;
 103         }
 104
 105         FlatInput *input = new FlatInput(format, pixel_format, GL_HALF_FLOAT, input_width, input_height);
 106         input->set_pixel_data_fp16(data);
 107         chain.add_input(input);
 108         return input;
 109 }
 110
 111 Input *EffectChainTester::add_input(const unsigned char *data, MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve, int input_width, int input_height)
 112 {
 113         ImageFormat format;
 114         format.color_space = color_space;
 115         format.gamma_curve = gamma_curve;
 116
 117         if (input_width == -1) {
 118                 input_width = width;
 119         }
 120         if (input_height == -1) {
 121                 input_height = height;
 122         }
 123
 124         FlatInput *input = new FlatInput(format, pixel_format, GL_UNSIGNED_BYTE, input_width, input_height);
 125         input->set_pixel_data(data);
 126         chain.add_input(input);
 127         return input;
 128 }
 129
 130 void EffectChainTester::run(float *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 131 {
 132         internal_run<float>(out_data, nullptr, nullptr, nullptr, format, color_space, gamma_curve, alpha_format);
 133 }
 134
 135 void EffectChainTester::run(float *out_data, float *out_data2, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 136 {
 137         internal_run<float>(out_data, out_data2, nullptr, nullptr, format, color_space, gamma_curve, alpha_format);
 138 }
 139
 140 void EffectChainTester::run(float *out_data, float *out_data2, float *out_data3, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 141 {
 142         internal_run<float>(out_data, out_data2, out_data3, nullptr, format, color_space, gamma_curve, alpha_format);
 143 }
 144
 145 void EffectChainTester::run(float *out_data, float *out_data2, float *out_data3, float *out_data4, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 146 {
 147         internal_run(out_data, out_data2, out_data3, out_data4, format, color_space, gamma_curve, alpha_format);
 148 }
 149
 150 void EffectChainTester::run(unsigned char *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 151 {
 152         internal_run<unsigned char>(out_data, nullptr, nullptr, nullptr, format, color_space, gamma_curve, alpha_format);
 153 }
 154
 155 void EffectChainTester::run(unsigned char *out_data, unsigned char *out_data2, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 156 {
 157         internal_run<unsigned char>(out_data, out_data2, nullptr, nullptr, format, color_space, gamma_curve, alpha_format);
 158 }
 159
 160 void EffectChainTester::run(unsigned char *out_data, unsigned char *out_data2, unsigned char *out_data3, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 161 {
 162         internal_run<unsigned char>(out_data, out_data2, out_data3, nullptr, format, color_space, gamma_curve, alpha_format);
 163 }
 164
 165 void EffectChainTester::run(unsigned char *out_data, unsigned char *out_data2, unsigned char *out_data3, unsigned char *out_data4, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 166 {
 167         internal_run(out_data, out_data2, out_data3, out_data4, format, color_space, gamma_curve, alpha_format);
 168 }
 169
 170 void EffectChainTester::run(uint16_t *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 171 {
 172         internal_run<uint16_t>(out_data, nullptr, nullptr, nullptr, format, color_space, gamma_curve, alpha_format);
 173 }
 174
 175 void EffectChainTester::run_10_10_10_2(uint32_t *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 176 {
 177         internal_run<uint32_t>(out_data, nullptr, nullptr, nullptr, format, color_space, gamma_curve, alpha_format);
 178 }
 179
 180 #ifdef HAVE_BENCHMARK
 181
 182 void EffectChainTester::benchmark(benchmark::State &state, float *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 183 {
 184         internal_run<float>(out_data, nullptr, nullptr, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 185 }
 186
 187 void EffectChainTester::benchmark(benchmark::State &state, float *out_data, float *out_data2, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 188 {
 189         internal_run<float>(out_data, out_data2, nullptr, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 190 }
 191
 192 void EffectChainTester::benchmark(benchmark::State &state, float *out_data, float *out_data2, float *out_data3, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 193 {
 194         internal_run<float>(out_data, out_data2, out_data3, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 195 }
 196
 197 void EffectChainTester::benchmark(benchmark::State &state, float *out_data, float *out_data2, float *out_data3, float *out_data4, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 198 {
 199         internal_run(out_data, out_data2, out_data3, out_data4, format, color_space, gamma_curve, alpha_format, &state);
 200 }
 201
 202 void EffectChainTester::benchmark(benchmark::State &state, fp16_int_t *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 203 {
 204         internal_run<fp16_int_t>(out_data, nullptr, nullptr, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 205 }
 206
 207 void EffectChainTester::benchmark(benchmark::State &state, fp16_int_t *out_data, fp16_int_t *out_data2, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 208 {
 209         internal_run<fp16_int_t>(out_data, out_data2, nullptr, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 210 }
 211
 212 void EffectChainTester::benchmark(benchmark::State &state, fp16_int_t *out_data, fp16_int_t *out_data2, fp16_int_t *out_data3, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 213 {
 214         internal_run<fp16_int_t>(out_data, out_data2, out_data3, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 215 }
 216
 217 void EffectChainTester::benchmark(benchmark::State &state, fp16_int_t *out_data, fp16_int_t *out_data2, fp16_int_t *out_data3, fp16_int_t *out_data4, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 218 {
 219         internal_run(out_data, out_data2, out_data3, out_data4, format, color_space, gamma_curve, alpha_format, &state);
 220 }
 221
 222 void EffectChainTester::benchmark(benchmark::State &state, unsigned char *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 223 {
 224         internal_run<unsigned char>(out_data, nullptr, nullptr, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 225 }
 226
 227 void EffectChainTester::benchmark(benchmark::State &state, unsigned char *out_data, unsigned char *out_data2, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 228 {
 229         internal_run<unsigned char>(out_data, out_data2, nullptr, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 230 }
 231
 232 void EffectChainTester::benchmark(benchmark::State &state, unsigned char *out_data, unsigned char *out_data2, unsigned char *out_data3, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 233 {
 234         internal_run<unsigned char>(out_data, out_data2, out_data3, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 235 }
 236
 237 void EffectChainTester::benchmark(benchmark::State &state, unsigned char *out_data, unsigned char *out_data2, unsigned char *out_data3, unsigned char *out_data4, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 238 {
 239         internal_run(out_data, out_data2, out_data3, out_data4, format, color_space, gamma_curve, alpha_format, &state);
 240 }
 241
 242 void EffectChainTester::benchmark(benchmark::State &state, uint16_t *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 243 {
 244         internal_run<uint16_t>(out_data, nullptr, nullptr, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 245 }
 246
 247 void EffectChainTester::benchmark_10_10_10_2(benchmark::State &state, uint32_t *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 248 {
 249         internal_run<uint32_t>(out_data, nullptr, nullptr, nullptr, format, color_space, gamma_curve, alpha_format, &state);
 250 }
 251
 252 #endif
 253
 254 template<class T>
 255 void EffectChainTester::internal_run(T *out_data, T *out_data2, T *out_data3, T *out_data4, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format
 256 #ifdef HAVE_BENCHMARK
 257 , benchmark::State *benchmark_state
 258 #endif
 259 )
 260 {
 261         if (!finalized) {
 262                 finalize_chain(color_space, gamma_curve, alpha_format);
 263         }
 264
 265         GLuint type;
 266         if (framebuffer_format == GL_RGBA8) {
 267                 type = GL_UNSIGNED_BYTE;
 268         } else if (framebuffer_format == GL_RGBA16) {
 269                 type = GL_UNSIGNED_SHORT;
 270         } else if (framebuffer_format == GL_RGBA16F && sizeof(T) == 2) {
 271                 type = GL_HALF_FLOAT;
 272         } else if (framebuffer_format == GL_RGBA16F || framebuffer_format == GL_RGBA32F) {
 273                 type = GL_FLOAT;
 274         } else if (framebuffer_format == GL_RGB10_A2) {
 275                 type = GL_UNSIGNED_INT_2_10_10_10_REV;
 276         } else {
 277                 // Add more here as needed.
 278                 assert(false);
 279         }
 280
 281         unsigned num_outputs;
 282         if (out_data4 != nullptr) {
 283                 num_outputs = 4;
 284         } else if (out_data3 != nullptr) {
 285                 num_outputs = 3;
 286         } else if (out_data2 != nullptr) {
 287                 num_outputs = 2;
 288         } else {
 289                 num_outputs = 1;
 290         }
 291
 292         glActiveTexture(GL_TEXTURE0);
 293         check_error();
 294
 295         vector<EffectChain::DestinationTexture> textures;
 296         for (unsigned i = 0; i < num_outputs; ++i) {
 297                 GLuint texnum = chain.get_resource_pool()->create_2d_texture(framebuffer_format, width, height);
 298                 textures.push_back(EffectChain::DestinationTexture{texnum, framebuffer_format});
 299
 300                 // The output texture needs to have valid state to be written to by a compute shader.
 301                 glBindTexture(GL_TEXTURE_2D, texnum);
 302                 check_error();
 303                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 304                 check_error();
 305         }
 306
 307         chain.render_to_texture(textures, width, height);
 308
 309 #ifdef HAVE_BENCHMARK
 310         // If running benchmarks: Now we've warmed up everything, so let's run the
 311         // actual benchmark loop.
 312         if (benchmark_state != nullptr) {
 313                 glFinish();
 314                 size_t iters = benchmark_state->max_iterations;
 315                 for (auto _ : *benchmark_state) {
 316                         chain.render_to_texture(textures, width, height);
 317                         if (--iters == 0) {
 318                                 glFinish();
 319                         }
 320                 }
 321                 benchmark_state->SetItemsProcessed(benchmark_state->iterations() * width * height);
 322         }
 323 #endif
 324
 325         T *data[4] = { out_data, out_data2, out_data3, out_data4 };
 326
 327         for (unsigned i = 0; i < num_outputs; ++i) {
 328                 T *ptr = data[i];
 329                 glBindTexture(GL_TEXTURE_2D, textures[i].texnum);
 330                 check_error();
 331                 if (!epoxy_is_desktop_gl() && (format == GL_RED || format == GL_BLUE || format == GL_ALPHA)) {
 332                         // GLES will only read GL_RGBA.
 333                         T *temp = new T[width * height * 4];
 334                         glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, type, temp);
 335                         check_error();
 336                         if (format == GL_ALPHA) {
 337                                 for (unsigned i = 0; i < width * height; ++i) {
 338                                         ptr[i] = temp[i * 4 + 3];
 339                                 }
 340                         } else if (format == GL_BLUE) {
 341                                 for (unsigned i = 0; i < width * height; ++i) {
 342                                         ptr[i] = temp[i * 4 + 2];
 343                                 }
 344                         } else {
 345                                 for (unsigned i = 0; i < width * height; ++i) {
 346                                         ptr[i] = temp[i * 4];
 347                                 }
 348                         }
 349                         delete[] temp;
 350                 } else {
 351                         glGetTexImage(GL_TEXTURE_2D, 0, format, type, ptr);
 352                         check_error();
 353                 }
 354
 355                 if (format == GL_RGBA && (type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_SHORT || type == GL_FLOAT)) {
 356                         vertical_flip(ptr, width * 4, height);
 357                 } else {
 358                         vertical_flip(ptr, width, height);
 359                 }
 360         }
 361
 362         for (unsigned i = 0; i < num_outputs; ++i) {
 363                 chain.get_resource_pool()->release_2d_texture(textures[i].texnum);
 364         }
 365 }
 366
 367 void EffectChainTester::add_output(const ImageFormat &format, OutputAlphaFormat alpha_format)
 368 {
 369         chain.add_output(format, alpha_format);
 370         output_added = true;
 371 }
 372
 373 void EffectChainTester::add_ycbcr_output(const ImageFormat &format, OutputAlphaFormat alpha_format, const YCbCrFormat &ycbcr_format, YCbCrOutputSplitting output_splitting, GLenum type)
 374 {
 375         chain.add_ycbcr_output(format, alpha_format, ycbcr_format, output_splitting, type);
 376         output_added = true;
 377 }
 378
 379 void EffectChainTester::finalize_chain(Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 380 {
 381         assert(!finalized);
 382         if (!output_added) {
 383                 ImageFormat image_format;
 384                 image_format.color_space = color_space;
 385                 image_format.gamma_curve = gamma_curve;
 386                 chain.add_output(image_format, alpha_format);
 387                 output_added = true;
 388         }
 389         chain.finalize();
 390         finalized = true;
 391 }
 392
 393 void expect_equal(const float *ref, const float *result, unsigned width, unsigned height, float largest_difference_limit, float rms_limit)
 394 {
 395         float largest_difference = -1.0f;
 396         float squared_difference = 0.0f;
 397         int largest_diff_x = -1, largest_diff_y = -1;
 398
 399         for (unsigned y = 0; y < height; ++y) {
 400                 for (unsigned x = 0; x < width; ++x) {
 401                         float diff = ref[y * width + x] - result[y * width + x];
 402                         if (fabs(diff) > largest_difference) {
 403                                 largest_difference = fabs(diff);
 404                                 largest_diff_x = x;
 405                                 largest_diff_y = y;
 406                         }
 407                         squared_difference += diff * diff;
 408                 }
 409         }
 410
 411         EXPECT_LT(largest_difference, largest_difference_limit)
 412                 << "Largest difference is in x=" << largest_diff_x << ", y=" << largest_diff_y << ":\n"
 413                 << "Reference: " << ref[largest_diff_y * width + largest_diff_x] << "\n"
 414                 << "Result:    " << result[largest_diff_y * width + largest_diff_x];
 415
 416         float rms = sqrt(squared_difference) / (width * height);
 417         EXPECT_LT(rms, rms_limit);
 418
 419         if (largest_difference >= largest_difference_limit || isnan(rms) || rms >= rms_limit) {
 420                 fprintf(stderr, "Dumping matrices for easier debugging, since at least one test failed.\n");
 421
 422                 fprintf(stderr, "Reference:\n");
 423                 for (unsigned y = 0; y < height; ++y) {
 424                         for (unsigned x = 0; x < width; ++x) {
 425                                 fprintf(stderr, "%7.4f ", ref[y * width + x]);
 426                         }
 427                         fprintf(stderr, "\n");
 428                 }
 429
 430                 fprintf(stderr, "\nResult:\n");
 431                 for (unsigned y = 0; y < height; ++y) {
 432                         for (unsigned x = 0; x < width; ++x) {
 433                                 fprintf(stderr, "%7.4f ", result[y * width + x]);
 434                         }
 435                         fprintf(stderr, "\n");
 436                 }
 437         }
 438 }
 439
 440 void expect_equal(const unsigned char *ref, const unsigned char *result, unsigned width, unsigned height, unsigned largest_difference_limit, float rms_limit)
 441 {
 442         assert(width > 0);
 443         assert(height > 0);
 444
 445         float *ref_float = new float[width * height];
 446         float *result_float = new float[width * height];
 447
 448         for (unsigned y = 0; y < height; ++y) {
 449                 for (unsigned x = 0; x < width; ++x) {
 450                         ref_float[y * width + x] = ref[y * width + x];
 451                         result_float[y * width + x] = result[y * width + x];
 452                 }
 453         }
 454
 455         expect_equal(ref_float, result_float, width, height, largest_difference_limit, rms_limit);
 456
 457         delete[] ref_float;
 458         delete[] result_float;
 459 }
 460
 461 void expect_equal(const uint16_t *ref, const uint16_t *result, unsigned width, unsigned height, unsigned largest_difference_limit, float rms_limit)
 462 {
 463         assert(width > 0);
 464         assert(height > 0);
 465
 466         float *ref_float = new float[width * height];
 467         float *result_float = new float[width * height];
 468
 469         for (unsigned y = 0; y < height; ++y) {
 470                 for (unsigned x = 0; x < width; ++x) {
 471                         ref_float[y * width + x] = ref[y * width + x];
 472                         result_float[y * width + x] = result[y * width + x];
 473                 }
 474         }
 475
 476         expect_equal(ref_float, result_float, width, height, largest_difference_limit, rms_limit);
 477
 478         delete[] ref_float;
 479         delete[] result_float;
 480 }
 481
 482 void expect_equal(const int *ref, const int *result, unsigned width, unsigned height, unsigned largest_difference_limit, float rms_limit)
 483 {
 484         assert(width > 0);
 485         assert(height > 0);
 486
 487         float *ref_float = new float[width * height];
 488         float *result_float = new float[width * height];
 489
 490         for (unsigned y = 0; y < height; ++y) {
 491                 for (unsigned x = 0; x < width; ++x) {
 492                         ref_float[y * width + x] = ref[y * width + x];
 493                         result_float[y * width + x] = result[y * width + x];
 494                 }
 495         }
 496
 497         expect_equal(ref_float, result_float, width, height, largest_difference_limit, rms_limit);
 498
 499         delete[] ref_float;
 500         delete[] result_float;
 501 }
 502
 503 void test_accuracy(const float *expected, const float *result, unsigned num_values, double absolute_error_limit, double relative_error_limit, double local_relative_error_limit, double rms_limit)
 504 {
 505         double squared_difference = 0.0;
 506         for (unsigned i = 0; i < num_values; ++i) {
 507                 double absolute_error = fabs(expected[i] - result[i]);
 508                 squared_difference += absolute_error * absolute_error;
 509                 EXPECT_LT(absolute_error, absolute_error_limit);
 510
 511                 if (expected[i] > 0.0) {
 512                         double relative_error = fabs(absolute_error / expected[i]);
 513
 514                         EXPECT_LT(relative_error, relative_error_limit);
 515                 }
 516                 if (i < num_values - 1) {
 517                         double delta = expected[i + 1] - expected[i];
 518                         double local_relative_error = fabs(absolute_error / delta);
 519                         EXPECT_LT(local_relative_error, local_relative_error_limit);
 520                 }
 521         }
 522         double rms = sqrt(squared_difference) / num_values;
 523         EXPECT_LT(rms, rms_limit);
 524 }
 525
 526 double srgb_to_linear(double x)
 527 {
 528         // From the Wikipedia article on sRGB.
 529         if (x < 0.04045) {
 530                 return x / 12.92;
 531         } else {
 532                 return pow((x + 0.055) / 1.055, 2.4);
 533         }
 534 }
 535
 536 double linear_to_srgb(double x)
 537 {
 538         // From the Wikipedia article on sRGB.
 539         if (x < 0.0031308) {
 540                 return 12.92 * x;
 541         } else {
 542                 return 1.055 * pow(x, 1.0 / 2.4) - 0.055;
 543         }
 544 }
 545
 546 DisableComputeShadersTemporarily::DisableComputeShadersTemporarily(bool disable_compute_shaders)
 547         : disable_compute_shaders(disable_compute_shaders)
 548 {
 549         init_movit_for_test();
 550         saved_compute_shaders_supported = movit_compute_shaders_supported;
 551         if (disable_compute_shaders) {
 552                 movit_compute_shaders_supported = false;
 553         }
 554 }
 555
 556 DisableComputeShadersTemporarily::~DisableComputeShadersTemporarily()
 557 {
 558         movit_compute_shaders_supported = saved_compute_shaders_supported;
 559 }
 560
 561 bool DisableComputeShadersTemporarily::should_skip()
 562 {
 563         if (disable_compute_shaders) {
 564                 return false;
 565         }
 566
 567         if (!movit_compute_shaders_supported) {
 568                 fprintf(stderr, "Compute shaders not supported; skipping.\n");
 569                 return true;
 570         }
 571         return false;
 572 }
 573
 574 #ifdef HAVE_BENCHMARK
 575 bool DisableComputeShadersTemporarily::should_skip(benchmark::State *benchmark_state)
 576 {
 577         if (disable_compute_shaders) {
 578                 return false;
 579         }
 580
 581         if (!movit_compute_shaders_supported) {
 582                 benchmark_state->SkipWithError("Compute shaders not supported");
 583                 return true;
 584         }
 585         return false;
 586 }
 587 #endif
 588
 589 }  // namespace movit