dali/internal/graphics/gles-impl/gles-graphics-reflection.cpp

   1 /*
   2  * Copyright (c) 2021 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 #include "gles-graphics-reflection.h"
  19
  20 #include <dali/integration-api/debug.h>
  21 #include <dali/integration-api/gl-abstraction.h>
  22 #include <dali/integration-api/gl-defines.h>
  23
  24 #include <vector>
  25 #include "egl-graphics-controller.h"
  26
  27 #include <GLES3/gl3.h>
  28 #include <GLES3/gl31.h>
  29
  30 #include "gles-graphics-program.h"
  31
  32 #include <iostream>
  33
  34 namespace
  35 {
  36 struct StringSize
  37 {
  38   const char* const mString;
  39   const uint32_t    mLength;
  40
  41   template<uint32_t kLength>
  42   constexpr StringSize(const char (&string)[kLength])
  43   : mString(string),
  44     mLength(kLength - 1) // remove terminating null; N.B. there should be no other null.
  45   {
  46   }
  47
  48   operator const char*() const
  49   {
  50     return mString;
  51   }
  52 };
  53
  54 bool operator==(const StringSize& lhs, const char* rhs)
  55 {
  56   return strncmp(lhs.mString, rhs, lhs.mLength) == 0;
  57 }
  58
  59 const char* const    DELIMITERS = " \t\n";
  60 constexpr StringSize UNIFORM{"uniform"};
  61 constexpr StringSize SAMPLER_PREFIX{"sampler"};
  62 constexpr StringSize SAMPLER_TYPES[]   = {"2D", "Cube", "ExternalOES"};
  63 constexpr auto       END_SAMPLER_TYPES = SAMPLER_TYPES + std::extent<decltype(SAMPLER_TYPES)>::value;
  64
  65 Dali::Graphics::VertexInputAttributeFormat GetVertexAttributeTypeFormat(GLenum type)
  66 {
  67   switch(type)
  68   {
  69     case GL_FLOAT:
  70       return Dali::Graphics::VertexInputAttributeFormat::FLOAT;
  71     case GL_FLOAT_VEC2:
  72       return Dali::Graphics::VertexInputAttributeFormat::VEC2;
  73     case GL_FLOAT_VEC3:
  74       return Dali::Graphics::VertexInputAttributeFormat::VEC3;
  75     case GL_FLOAT_VEC4:
  76       return Dali::Graphics::VertexInputAttributeFormat::VEC4;
  77     case GL_INT:
  78       return Dali::Graphics::VertexInputAttributeFormat::INTEGER;
  79     default:
  80       return Dali::Graphics::VertexInputAttributeFormat::UNDEFINED;
  81   }
  82 }
  83
  84 uint32_t GetGLDataTypeSize(GLenum type)
  85 {
  86   // There are many more types than what are covered here, but
  87   // they are not supported in dali.
  88   switch(type)
  89   {
  90     case GL_FLOAT: // "float", 1 float, 4 bytes
  91       return 4;
  92     case GL_FLOAT_VEC2: // "vec2", 2 floats, 8 bytes
  93       return 8;
  94     case GL_FLOAT_VEC3: // "vec3", 3 floats, 12 bytes
  95       return 12;
  96     case GL_FLOAT_VEC4: // "vec4", 4 floats, 16 bytes
  97       return 16;
  98     case GL_INT: // "int", 1 integer, 4 bytes
  99       return 4;
 100     case GL_FLOAT_MAT2: // "mat2", 4 floats, 16 bytes
 101       return 16;
 102     case GL_FLOAT_MAT3: // "mat3", 3 vec3, 36 bytes
 103       return 36;
 104     case GL_FLOAT_MAT4: // "mat4", 4 vec4, 64 bytes
 105       return 64;
 106     default:
 107       return 0;
 108   }
 109 }
 110
 111 bool IsSampler(GLenum type)
 112 {
 113   return type == GL_SAMPLER_2D || type == GL_SAMPLER_3D || type == GL_SAMPLER_CUBE || type == GL_SAMPLER_EXTERNAL_OES;
 114 }
 115
 116 bool SortUniformInfoByLocation(Dali::Graphics::UniformInfo a, Dali::Graphics::UniformInfo b)
 117 {
 118   return a.location < b.location;
 119 }
 120
 121 bool SortUniformExtraInfoByLocation(Dali::Graphics::GLES::Reflection::UniformExtraInfo a, Dali::Graphics::GLES::Reflection::UniformExtraInfo b)
 122 {
 123   return a.location < b.location;
 124 }
 125
 126 std::string GetShaderSource(Dali::Graphics::ShaderState shaderState)
 127 {
 128   std::vector<uint8_t> data;
 129   auto*                shader           = static_cast<const Dali::Graphics::GLES::Shader*>(shaderState.shader);
 130   auto&                shaderCreateInfo = shader->GetCreateInfo();
 131   data.resize(shaderCreateInfo.sourceSize + 1);
 132   std::memcpy(&data[0], shaderCreateInfo.sourceData, shaderCreateInfo.sourceSize);
 133   data[shaderCreateInfo.sourceSize] = 0;
 134
 135   return std::string(reinterpret_cast<char*>(&data[0]));
 136 }
 137
 138 void ParseShaderSamplers(std::string shaderSource, std::vector<Dali::Graphics::UniformInfo>& uniformOpaques, int& samplerPosition, std::vector<int>& samplerPositions)
 139 {
 140   if(!shaderSource.empty())
 141   {
 142     char* shaderStr = strdup(shaderSource.c_str());
 143     char* uniform   = strstr(shaderStr, UNIFORM);
 144
 145     while(uniform)
 146     {
 147       char* outerToken = strtok_r(uniform + UNIFORM.mLength, ";", &uniform);
 148
 149       char* nextPtr = nullptr;
 150       char* token   = strtok_r(outerToken, DELIMITERS, &nextPtr);
 151       while(token)
 152       {
 153         if(SAMPLER_PREFIX == token)
 154         {
 155           token += SAMPLER_PREFIX.mLength;
 156           if(std::find(SAMPLER_TYPES, END_SAMPLER_TYPES, token) != END_SAMPLER_TYPES)
 157           {
 158             bool found(false);
 159             token = strtok_r(nullptr, DELIMITERS, &nextPtr);
 160
 161             for(uint32_t i = 0; i < static_cast<uint32_t>(uniformOpaques.size()); ++i)
 162             {
 163               if(samplerPositions[i] == -1 &&
 164                  strncmp(token, uniformOpaques[i].name.c_str(), uniformOpaques[i].name.size()) == 0)
 165               {
 166                 samplerPositions[i] = uniformOpaques[i].offset = samplerPosition++;
 167                 found                                          = true;
 168                 break;
 169               }
 170             }
 171
 172             if(!found)
 173             {
 174               DALI_LOG_ERROR("Sampler uniform %s declared but not used in the shader\n", token);
 175             }
 176             break;
 177           }
 178         }
 179
 180         token = strtok_r(nullptr, DELIMITERS, &nextPtr);
 181       }
 182
 183       uniform = strstr(uniform, UNIFORM);
 184     }
 185     free(shaderStr);
 186   }
 187 }
 188
 189 } // anonymous namespace
 190
 191 namespace Dali::Graphics::GLES
 192 {
 193 Reflection::Reflection(GLES::ProgramImpl& program, Graphics::EglGraphicsController& controller)
 194 : Graphics::Reflection(),
 195   mController(controller),
 196   mProgram(program)
 197 {
 198 }
 199
 200 Reflection::~Reflection() = default;
 201
 202 void Reflection::BuildVertexAttributeReflection()
 203 {
 204   auto glProgram = mProgram.GetGlProgram();
 205
 206   int    written, size, location, maxLength, nAttribs;
 207   GLenum type;
 208   char*  name;
 209
 210   auto gl = mController.GetGL();
 211   if(!gl)
 212   {
 213     // Do nothing during shutdown
 214     return;
 215   }
 216
 217   gl->GetProgramiv(glProgram, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &maxLength);
 218   gl->GetProgramiv(glProgram, GL_ACTIVE_ATTRIBUTES, &nAttribs);
 219
 220   mVertexInputAttributes.clear();
 221   mVertexInputAttributes.resize(nAttribs);
 222
 223   name = new GLchar[maxLength];
 224   for(int i = 0; i < nAttribs; i++)
 225   {
 226     gl->GetActiveAttrib(glProgram, i, maxLength, &written, &size, &type, name);
 227     location = gl->GetAttribLocation(glProgram, name);
 228
 229     if(location >= 0)
 230     {
 231       AttributeInfo attributeInfo;
 232       attributeInfo.location = location;
 233       attributeInfo.name     = name;
 234       attributeInfo.format   = GetVertexAttributeTypeFormat(type);
 235       mVertexInputAttributes.insert(mVertexInputAttributes.begin() + location, attributeInfo);
 236     }
 237   }
 238   delete[] name;
 239 }
 240
 241 void Reflection::BuildUniformReflection()
 242 {
 243   auto glProgram = mProgram.GetGlProgram();
 244
 245   int   maxLen;
 246   char* name;
 247
 248   int numUniforms = 0;
 249
 250   auto gl = mController.GetGL();
 251   if(!gl)
 252   {
 253     // Do nothing during shutdown
 254     return;
 255   }
 256
 257   gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORM_MAX_LENGTH, &maxLen);
 258   gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORMS, &numUniforms);
 259
 260   mUniformBlocks.clear();
 261   mDefaultUniformBlock.members.clear();
 262   mUniformOpaques.clear();
 263
 264   name = new char[maxLen];
 265
 266   mStandaloneUniformExtraInfos.clear();
 267
 268   for(int i = 0; i < numUniforms; ++i)
 269   {
 270     int    elementCount;
 271     GLenum type;
 272     int    written;
 273     gl->GetActiveUniform(glProgram, i, maxLen, &written, &elementCount, &type, name);
 274     int location = gl->GetUniformLocation(glProgram, name);
 275
 276     Dali::Graphics::UniformInfo uniformInfo;
 277
 278     uniformInfo.name = name;
 279     if(elementCount > 1)
 280     {
 281       auto iter = std::string(uniformInfo.name).find("[", 0);
 282       if(iter != std::string::npos)
 283       {
 284         uniformInfo.name = std::string(name).substr(0, iter);
 285       }
 286     }
 287
 288     uniformInfo.uniformClass = IsSampler(type) ? Dali::Graphics::UniformClass::COMBINED_IMAGE_SAMPLER : Dali::Graphics::UniformClass::UNIFORM;
 289     uniformInfo.location     = location; //IsSampler(type) ? 0 : location;
 290     uniformInfo.binding      = 0;        // IsSampler(type) ? location : 0;
 291     uniformInfo.bufferIndex  = 0;
 292     uniformInfo.offset       = 0;
 293
 294     if(IsSampler(type))
 295     {
 296       mUniformOpaques.push_back(uniformInfo);
 297     }
 298     else
 299     {
 300       mDefaultUniformBlock.members.push_back(uniformInfo);
 301       mStandaloneUniformExtraInfos.emplace_back(location, GetGLDataTypeSize(type), uniformInfo.offset, elementCount, type);
 302     }
 303   }
 304
 305   // Re-order according to uniform locations.
 306
 307   if(mDefaultUniformBlock.members.size() > 1)
 308   {
 309     std::sort(mDefaultUniformBlock.members.begin(), mDefaultUniformBlock.members.end(), SortUniformInfoByLocation);
 310     std::sort(mStandaloneUniformExtraInfos.begin(), mStandaloneUniformExtraInfos.end(), SortUniformExtraInfoByLocation);
 311   }
 312
 313   if(mUniformOpaques.size() > 1)
 314   {
 315     SortOpaques();
 316   }
 317
 318   // Calculate the uniform offset
 319   for(unsigned int i = 0; i < mDefaultUniformBlock.members.size(); ++i)
 320   {
 321     if(i == 0)
 322     {
 323       mDefaultUniformBlock.members[i].offset = 0;
 324     }
 325     else
 326     {
 327       uint32_t previousUniformLocation = mDefaultUniformBlock.members[i - 1].location;
 328       auto     previousUniform         = std::find_if(mStandaloneUniformExtraInfos.begin(), mStandaloneUniformExtraInfos.end(), [&previousUniformLocation](const UniformExtraInfo& iter) { return iter.location == previousUniformLocation; });
 329       if(previousUniform != mStandaloneUniformExtraInfos.end())
 330       {
 331         mDefaultUniformBlock.members[i].offset = mDefaultUniformBlock.members[i - 1].offset + (previousUniform->size * previousUniform->arraySize);
 332         mStandaloneUniformExtraInfos[i].offset = mDefaultUniformBlock.members[i].offset;
 333       }
 334     }
 335   }
 336
 337   if(mDefaultUniformBlock.members.size() > 0)
 338   {
 339     uint32_t lastUniformLocation = mDefaultUniformBlock.members.back().location;
 340     auto     lastUniform         = std::find_if(mStandaloneUniformExtraInfos.begin(), mStandaloneUniformExtraInfos.end(), [&lastUniformLocation](const UniformExtraInfo& iter) { return iter.location == lastUniformLocation; });
 341     if(lastUniform != mStandaloneUniformExtraInfos.end())
 342     {
 343       mDefaultUniformBlock.size = mDefaultUniformBlock.members.back().offset + (lastUniform->size * lastUniform->arraySize);
 344       mUniformBlocks.push_back(mDefaultUniformBlock);
 345     }
 346   }
 347   else
 348   {
 349     mDefaultUniformBlock.size = 0;
 350   }
 351
 352   delete[] name;
 353 }
 354
 355 // TODO: Maybe this is not needed if uniform block is not support by dali shaders?
 356 void Reflection::BuildUniformBlockReflection()
 357 {
 358   auto gl               = mController.GetGL();
 359   auto glProgram        = mProgram.GetGlProgram();
 360   int  numUniformBlocks = 0;
 361
 362   if(!gl)
 363   {
 364     // Do nothing during shutdown
 365     return;
 366   }
 367
 368   gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORM_BLOCKS, &numUniformBlocks);
 369
 370   mUniformBlocks.clear();
 371   mUniformBlocks.resize(numUniformBlocks);
 372
 373   int uniformBlockMaxLength = 0;
 374   gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH, &uniformBlockMaxLength);
 375
 376   char* uniformBlockName = new char[uniformBlockMaxLength];
 377   for(int i = 0; i < numUniformBlocks; i++)
 378   {
 379     int length;
 380     int blockBinding;
 381     int blockDataSize;
 382     gl->GetActiveUniformBlockName(glProgram, i, uniformBlockMaxLength, &length, uniformBlockName);
 383     gl->GetActiveUniformBlockiv(glProgram, i, GL_UNIFORM_BLOCK_BINDING, &blockBinding);
 384     gl->GetActiveUniformBlockiv(glProgram, i, GL_UNIFORM_BLOCK_DATA_SIZE, &blockDataSize);
 385
 386     Dali::Graphics::UniformBlockInfo uniformBlockInfo;
 387     uniformBlockInfo.name    = uniformBlockName;
 388     uniformBlockInfo.size    = blockDataSize;
 389     uniformBlockInfo.binding = blockBinding;
 390
 391     int nUnis;
 392     gl->GetActiveUniformBlockiv(glProgram, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, &nUnis);
 393     int* unifIndexes = new GLint[nUnis];
 394     gl->GetActiveUniformBlockiv(glProgram, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES, unifIndexes);
 395     char* uniformName{};
 396     int   maxUniLen;
 397     gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORM_MAX_LENGTH, &maxUniLen);
 398
 399     for(int unif = 0; unif < nUnis; ++unif)
 400     {
 401       int    uniIndex = unifIndexes[unif];
 402       int    size;
 403       GLenum type;
 404
 405       gl->GetActiveUniform(glProgram, uniIndex, maxUniLen, &length, &size, &type, uniformName);
 406       int location = gl->GetUniformLocation(glProgram, uniformName);
 407
 408       Dali::Graphics::UniformInfo uniform;
 409       uniform.name     = uniformName;
 410       uniform.location = location;
 411       uniformBlockInfo.members.push_back(uniform);
 412     }
 413
 414     delete[] unifIndexes;
 415
 416     mUniformBlocks.push_back(uniformBlockInfo);
 417   }
 418   delete[] uniformBlockName;
 419 }
 420
 421 uint32_t Reflection::GetVertexAttributeLocation(const std::string& name) const
 422 {
 423   for(auto&& attr : mVertexInputAttributes)
 424   {
 425     if(attr.name == name)
 426     {
 427       return attr.location;
 428     }
 429   }
 430   return ERROR_ATTRIBUTE_NOT_FOUND;
 431 }
 432
 433 Dali::Graphics::VertexInputAttributeFormat Reflection::GetVertexAttributeFormat(uint32_t location) const
 434 {
 435   if(location >= mVertexInputAttributes.size())
 436   {
 437     return Dali::Graphics::VertexInputAttributeFormat::UNDEFINED;
 438   }
 439
 440   return mVertexInputAttributes[location].format;
 441 }
 442
 443 std::string Reflection::GetVertexAttributeName(uint32_t location) const
 444 {
 445   if(location >= mVertexInputAttributes.size())
 446   {
 447     return std::string();
 448   }
 449
 450   return mVertexInputAttributes[location].name;
 451 }
 452
 453 std::vector<uint32_t> Reflection::GetVertexAttributeLocations() const
 454 {
 455   std::vector<uint32_t> locations;
 456   for(auto&& attr : mVertexInputAttributes)
 457   {
 458     if(attr.format != Dali::Graphics::VertexInputAttributeFormat::UNDEFINED)
 459     {
 460       locations.push_back(attr.location);
 461     }
 462   }
 463
 464   return locations;
 465 }
 466
 467 uint32_t Reflection::GetUniformBlockCount() const
 468 {
 469   return mUniformBlocks.size();
 470 }
 471
 472 uint32_t Reflection::GetUniformBlockBinding(uint32_t index) const
 473 {
 474   return index < mUniformBlocks.size() ? mUniformBlocks[index].binding : 0u;
 475 }
 476
 477 uint32_t Reflection::GetUniformBlockSize(uint32_t index) const
 478 {
 479   return index < mUniformBlocks.size() ? mUniformBlocks[index].size : 0u;
 480 }
 481
 482 bool Reflection::GetUniformBlock(uint32_t index, Dali::Graphics::UniformBlockInfo& out) const
 483 {
 484   if(index >= mUniformBlocks.size())
 485   {
 486     return false;
 487   }
 488
 489   const auto& block = mUniformBlocks[index];
 490
 491   out.name          = block.name;
 492   out.binding       = block.binding;
 493   out.descriptorSet = block.descriptorSet;
 494   auto membersSize  = block.members.size();
 495   out.members.resize(membersSize);
 496   out.size = block.size;
 497   for(auto i = 0u; i < out.members.size(); ++i)
 498   {
 499     const auto& memberUniform   = block.members[i];
 500     out.members[i].name         = memberUniform.name;
 501     out.members[i].binding      = block.binding;
 502     out.members[i].uniformClass = Graphics::UniformClass::UNIFORM;
 503     out.members[i].offset       = memberUniform.offset;
 504     out.members[i].location     = memberUniform.location;
 505   }
 506
 507   return true;
 508 }
 509
 510 std::vector<uint32_t> Reflection::GetUniformBlockLocations() const
 511 {
 512   std::vector<uint32_t> retval{};
 513   for(auto&& ubo : mUniformBlocks)
 514   {
 515     retval.emplace_back(ubo.binding);
 516   }
 517   return retval;
 518 }
 519
 520 std::string Reflection::GetUniformBlockName(uint32_t blockIndex) const
 521 {
 522   if(blockIndex < mUniformBlocks.size())
 523   {
 524     return mUniformBlocks[blockIndex].name;
 525   }
 526   else
 527   {
 528     return std::string();
 529   }
 530 }
 531
 532 uint32_t Reflection::GetUniformBlockMemberCount(uint32_t blockIndex) const
 533 {
 534   if(blockIndex < mUniformBlocks.size())
 535   {
 536     return static_cast<uint32_t>(mUniformBlocks[blockIndex].members.size());
 537   }
 538   else
 539   {
 540     return 0u;
 541   }
 542 }
 543
 544 std::string Reflection::GetUniformBlockMemberName(uint32_t blockIndex, uint32_t memberLocation) const
 545 {
 546   if(blockIndex < mUniformBlocks.size() && memberLocation < mUniformBlocks[blockIndex].members.size())
 547   {
 548     return mUniformBlocks[blockIndex].members[memberLocation].name;
 549   }
 550   else
 551   {
 552     return std::string();
 553   }
 554 }
 555
 556 uint32_t Reflection::GetUniformBlockMemberOffset(uint32_t blockIndex, uint32_t memberLocation) const
 557 {
 558   if(blockIndex < mUniformBlocks.size() && memberLocation < mUniformBlocks[blockIndex].members.size())
 559   {
 560     return mUniformBlocks[blockIndex].members[memberLocation].offset;
 561   }
 562   else
 563   {
 564     return 0u;
 565   }
 566 }
 567
 568 bool Reflection::GetNamedUniform(const std::string& name, Dali::Graphics::UniformInfo& out) const
 569 {
 570   auto index = 0u;
 571   for(auto&& ubo : mUniformBlocks)
 572   {
 573     for(auto&& member : ubo.members)
 574     {
 575       if(name == member.name || name == (ubo.name + "." + member.name))
 576       {
 577         out.name         = name;
 578         out.location     = member.location;
 579         out.binding      = ubo.binding;
 580         out.bufferIndex  = index;
 581         out.offset       = member.offset;
 582         out.uniformClass = Graphics::UniformClass::UNIFORM;
 583         return true;
 584       }
 585     }
 586     ++index;
 587   }
 588
 589   // check samplers
 590   index = 0u;
 591   for(auto&& uniform : mUniformOpaques)
 592   {
 593     if(uniform.name == name)
 594     {
 595       out.uniformClass = Graphics::UniformClass::COMBINED_IMAGE_SAMPLER;
 596       out.binding      = 0;
 597       out.name         = name;
 598       out.offset       = index;            // lexical location in shader
 599       out.location     = uniform.location; // uniform location mapping
 600       return true;
 601     }
 602     ++index;
 603   }
 604
 605   return false;
 606 }
 607
 608 std::vector<GLenum> Reflection::GetStandaloneUniformTypes() const
 609 {
 610   std::vector<GLenum> retval{};
 611   for(auto&& uniform : mStandaloneUniformExtraInfos)
 612   {
 613     retval.emplace_back(uniform.type);
 614   }
 615
 616   return retval;
 617 }
 618
 619 const std::vector<Reflection::UniformExtraInfo>& Reflection::GetStandaloneUniformExtraInfo() const
 620 {
 621   return mStandaloneUniformExtraInfos;
 622 }
 623
 624 const std::vector<Dali::Graphics::UniformInfo>& Reflection::GetSamplers() const
 625 {
 626   return mUniformOpaques;
 627 }
 628
 629 Graphics::ShaderLanguage Reflection::GetLanguage() const
 630 {
 631   auto version = Graphics::ShaderLanguage::GLSL_3_2;
 632
 633   auto gl = mController.GetGL();
 634   if(!gl)
 635   {
 636     // Do nothing during shutdown
 637     return version;
 638   }
 639
 640   int majorVersion, minorVersion;
 641   gl->GetIntegerv(GL_MAJOR_VERSION, &majorVersion);
 642   gl->GetIntegerv(GL_MINOR_VERSION, &minorVersion);
 643   DALI_LOG_RELEASE_INFO("GL Version (integer) : %d.%d\n", majorVersion, minorVersion);
 644   DALI_LOG_RELEASE_INFO("GLSL Version : %s\n", gl->GetString(GL_SHADING_LANGUAGE_VERSION));
 645
 646   // TODO: the language version is hardcoded for now, but we may use what we get
 647   // from GL_SHADING_LANGUAGE_VERSION?
 648   return version;
 649 }
 650
 651 void Reflection::SortOpaques()
 652 {
 653   //Determine declaration order of each sampler
 654   auto& programCreateInfo = mProgram.GetCreateInfo();
 655
 656   std::vector<uint8_t> data;
 657   std::string          vertShader;
 658   std::string          fragShader;
 659
 660   for(auto& shaderState : *programCreateInfo.shaderState)
 661   {
 662     if(shaderState.pipelineStage == PipelineStage::VERTEX_SHADER)
 663     {
 664       vertShader = GetShaderSource(shaderState);
 665     }
 666     else if(shaderState.pipelineStage == PipelineStage::FRAGMENT_SHADER)
 667     {
 668       fragShader = GetShaderSource(shaderState);
 669     }
 670   }
 671
 672   int              samplerPosition = 0;
 673   std::vector<int> samplerPositions(mUniformOpaques.size(), -1);
 674
 675   ParseShaderSamplers(vertShader, mUniformOpaques, samplerPosition, samplerPositions);
 676   ParseShaderSamplers(fragShader, mUniformOpaques, samplerPosition, samplerPositions);
 677
 678   std::sort(mUniformOpaques.begin(), mUniformOpaques.end(), [](const UniformInfo& a, const UniformInfo& b) { return a.offset < b.offset; });
 679 }
 680
 681 } // namespace Dali::Graphics::GLES