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   int maxLocationValue = nAttribs - 1;
 224
 225   name = new GLchar[maxLength];
 226   for(int i = 0; i < nAttribs; i++)
 227   {
 228     gl->GetActiveAttrib(glProgram, i, maxLength, &written, &size, &type, name);
 229     location = gl->GetAttribLocation(glProgram, name);
 230
 231     if(location >= 0)
 232     {
 233       if(maxLocationValue < location)
 234       {
 235         maxLocationValue = location;
 236         mVertexInputAttributes.resize(maxLocationValue + 1u);
 237       }
 238
 239       AttributeInfo attributeInfo;
 240       attributeInfo.location = location;
 241       attributeInfo.name     = name;
 242       attributeInfo.format   = GetVertexAttributeTypeFormat(type);
 243       mVertexInputAttributes[location] = std::move(attributeInfo);
 244     }
 245   }
 246
 247   delete[] name;
 248 }
 249
 250 void Reflection::BuildUniformReflection()
 251 {
 252   auto glProgram = mProgram.GetGlProgram();
 253
 254   int   maxLen;
 255   char* name;
 256
 257   int numUniforms = 0;
 258
 259   auto gl = mController.GetGL();
 260   if(!gl)
 261   {
 262     // Do nothing during shutdown
 263     return;
 264   }
 265
 266   gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORM_MAX_LENGTH, &maxLen);
 267   gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORMS, &numUniforms);
 268
 269   mUniformBlocks.clear();
 270   mDefaultUniformBlock.members.clear();
 271   mUniformOpaques.clear();
 272
 273   name = new char[maxLen];
 274
 275   mStandaloneUniformExtraInfos.clear();
 276
 277   for(int i = 0; i < numUniforms; ++i)
 278   {
 279     int    elementCount;
 280     GLenum type;
 281     int    written;
 282     gl->GetActiveUniform(glProgram, i, maxLen, &written, &elementCount, &type, name);
 283     int location = gl->GetUniformLocation(glProgram, name);
 284
 285     Dali::Graphics::UniformInfo uniformInfo;
 286
 287     uniformInfo.name = name;
 288     if(elementCount > 1)
 289     {
 290       auto iter = std::string(uniformInfo.name).find("[", 0);
 291       if(iter != std::string::npos)
 292       {
 293         uniformInfo.name = std::string(name).substr(0, iter);
 294       }
 295     }
 296
 297     uniformInfo.uniformClass = IsSampler(type) ? Dali::Graphics::UniformClass::COMBINED_IMAGE_SAMPLER : Dali::Graphics::UniformClass::UNIFORM;
 298     uniformInfo.location     = location; //IsSampler(type) ? 0 : location;
 299     uniformInfo.binding      = 0;        // IsSampler(type) ? location : 0;
 300     uniformInfo.bufferIndex  = 0;
 301     uniformInfo.offset       = 0;
 302
 303     if(IsSampler(type))
 304     {
 305       mUniformOpaques.push_back(uniformInfo);
 306     }
 307     else
 308     {
 309       mDefaultUniformBlock.members.push_back(uniformInfo);
 310       mStandaloneUniformExtraInfos.emplace_back(location, GetGLDataTypeSize(type), uniformInfo.offset, elementCount, type);
 311     }
 312   }
 313
 314   // Re-order according to uniform locations.
 315
 316   if(mDefaultUniformBlock.members.size() > 1)
 317   {
 318     std::sort(mDefaultUniformBlock.members.begin(), mDefaultUniformBlock.members.end(), SortUniformInfoByLocation);
 319     std::sort(mStandaloneUniformExtraInfos.begin(), mStandaloneUniformExtraInfos.end(), SortUniformExtraInfoByLocation);
 320   }
 321
 322   if(mUniformOpaques.size() > 1)
 323   {
 324     SortOpaques();
 325   }
 326
 327   // Calculate the uniform offset
 328   for(unsigned int i = 0; i < mDefaultUniformBlock.members.size(); ++i)
 329   {
 330     if(i == 0)
 331     {
 332       mDefaultUniformBlock.members[i].offset = 0;
 333     }
 334     else
 335     {
 336       uint32_t previousUniformLocation = mDefaultUniformBlock.members[i - 1].location;
 337       auto     previousUniform         = std::find_if(mStandaloneUniformExtraInfos.begin(), mStandaloneUniformExtraInfos.end(), [&previousUniformLocation](const UniformExtraInfo& iter) { return iter.location == previousUniformLocation; });
 338       if(previousUniform != mStandaloneUniformExtraInfos.end())
 339       {
 340         mDefaultUniformBlock.members[i].offset = mDefaultUniformBlock.members[i - 1].offset + (previousUniform->size * previousUniform->arraySize);
 341         mStandaloneUniformExtraInfos[i].offset = mDefaultUniformBlock.members[i].offset;
 342       }
 343     }
 344   }
 345
 346   if(mDefaultUniformBlock.members.size() > 0)
 347   {
 348     uint32_t lastUniformLocation = mDefaultUniformBlock.members.back().location;
 349     auto     lastUniform         = std::find_if(mStandaloneUniformExtraInfos.begin(), mStandaloneUniformExtraInfos.end(), [&lastUniformLocation](const UniformExtraInfo& iter) { return iter.location == lastUniformLocation; });
 350     if(lastUniform != mStandaloneUniformExtraInfos.end())
 351     {
 352       mDefaultUniformBlock.size = mDefaultUniformBlock.members.back().offset + (lastUniform->size * lastUniform->arraySize);
 353       mUniformBlocks.push_back(mDefaultUniformBlock);
 354     }
 355   }
 356   else
 357   {
 358     mDefaultUniformBlock.size = 0;
 359   }
 360
 361   delete[] name;
 362 }
 363
 364 // TODO: Maybe this is not needed if uniform block is not support by dali shaders?
 365 void Reflection::BuildUniformBlockReflection()
 366 {
 367   auto gl               = mController.GetGL();
 368   auto glProgram        = mProgram.GetGlProgram();
 369   int  numUniformBlocks = 0;
 370
 371   if(!gl)
 372   {
 373     // Do nothing during shutdown
 374     return;
 375   }
 376
 377   gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORM_BLOCKS, &numUniformBlocks);
 378
 379   mUniformBlocks.clear();
 380   mUniformBlocks.resize(numUniformBlocks);
 381
 382   int uniformBlockMaxLength = 0;
 383   gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH, &uniformBlockMaxLength);
 384
 385   char* uniformBlockName = new char[uniformBlockMaxLength];
 386   for(int i = 0; i < numUniformBlocks; i++)
 387   {
 388     int length;
 389     int blockBinding;
 390     int blockDataSize;
 391     gl->GetActiveUniformBlockName(glProgram, i, uniformBlockMaxLength, &length, uniformBlockName);
 392     gl->GetActiveUniformBlockiv(glProgram, i, GL_UNIFORM_BLOCK_BINDING, &blockBinding);
 393     gl->GetActiveUniformBlockiv(glProgram, i, GL_UNIFORM_BLOCK_DATA_SIZE, &blockDataSize);
 394
 395     Dali::Graphics::UniformBlockInfo uniformBlockInfo;
 396     uniformBlockInfo.name    = uniformBlockName;
 397     uniformBlockInfo.size    = blockDataSize;
 398     uniformBlockInfo.binding = blockBinding;
 399
 400     int nUnis;
 401     gl->GetActiveUniformBlockiv(glProgram, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, &nUnis);
 402     int* unifIndexes = new GLint[nUnis];
 403     gl->GetActiveUniformBlockiv(glProgram, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES, unifIndexes);
 404     char* uniformName{};
 405     int   maxUniLen;
 406     gl->GetProgramiv(glProgram, GL_ACTIVE_UNIFORM_MAX_LENGTH, &maxUniLen);
 407
 408     for(int unif = 0; unif < nUnis; ++unif)
 409     {
 410       int    uniIndex = unifIndexes[unif];
 411       int    size;
 412       GLenum type;
 413
 414       gl->GetActiveUniform(glProgram, uniIndex, maxUniLen, &length, &size, &type, uniformName);
 415       int location = gl->GetUniformLocation(glProgram, uniformName);
 416
 417       Dali::Graphics::UniformInfo uniform;
 418       uniform.name     = uniformName;
 419       uniform.location = location;
 420       uniformBlockInfo.members.push_back(uniform);
 421     }
 422
 423     delete[] unifIndexes;
 424
 425     mUniformBlocks.push_back(uniformBlockInfo);
 426   }
 427   delete[] uniformBlockName;
 428 }
 429
 430 uint32_t Reflection::GetVertexAttributeLocation(const std::string& name) const
 431 {
 432   for(auto&& attr : mVertexInputAttributes)
 433   {
 434     if(attr.name == name)
 435     {
 436       return attr.location;
 437     }
 438   }
 439   return ERROR_ATTRIBUTE_NOT_FOUND;
 440 }
 441
 442 Dali::Graphics::VertexInputAttributeFormat Reflection::GetVertexAttributeFormat(uint32_t location) const
 443 {
 444   if(location >= mVertexInputAttributes.size())
 445   {
 446     return Dali::Graphics::VertexInputAttributeFormat::UNDEFINED;
 447   }
 448
 449   return mVertexInputAttributes[location].format;
 450 }
 451
 452 std::string Reflection::GetVertexAttributeName(uint32_t location) const
 453 {
 454   if(location >= mVertexInputAttributes.size())
 455   {
 456     return std::string();
 457   }
 458
 459   return mVertexInputAttributes[location].name;
 460 }
 461
 462 std::vector<uint32_t> Reflection::GetVertexAttributeLocations() const
 463 {
 464   std::vector<uint32_t> locations;
 465   for(auto&& attr : mVertexInputAttributes)
 466   {
 467     if(attr.format != Dali::Graphics::VertexInputAttributeFormat::UNDEFINED)
 468     {
 469       locations.push_back(attr.location);
 470     }
 471   }
 472
 473   return locations;
 474 }
 475
 476 uint32_t Reflection::GetUniformBlockCount() const
 477 {
 478   return mUniformBlocks.size();
 479 }
 480
 481 uint32_t Reflection::GetUniformBlockBinding(uint32_t index) const
 482 {
 483   return index < mUniformBlocks.size() ? mUniformBlocks[index].binding : 0u;
 484 }
 485
 486 uint32_t Reflection::GetUniformBlockSize(uint32_t index) const
 487 {
 488   return index < mUniformBlocks.size() ? mUniformBlocks[index].size : 0u;
 489 }
 490
 491 bool Reflection::GetUniformBlock(uint32_t index, Dali::Graphics::UniformBlockInfo& out) const
 492 {
 493   if(index >= mUniformBlocks.size())
 494   {
 495     return false;
 496   }
 497
 498   const auto& block = mUniformBlocks[index];
 499
 500   out.name          = block.name;
 501   out.binding       = block.binding;
 502   out.descriptorSet = block.descriptorSet;
 503   auto membersSize  = block.members.size();
 504   out.members.resize(membersSize);
 505   out.size = block.size;
 506   for(auto i = 0u; i < out.members.size(); ++i)
 507   {
 508     const auto& memberUniform   = block.members[i];
 509     out.members[i].name         = memberUniform.name;
 510     out.members[i].binding      = block.binding;
 511     out.members[i].uniformClass = Graphics::UniformClass::UNIFORM;
 512     out.members[i].offset       = memberUniform.offset;
 513     out.members[i].location     = memberUniform.location;
 514   }
 515
 516   return true;
 517 }
 518
 519 std::vector<uint32_t> Reflection::GetUniformBlockLocations() const
 520 {
 521   std::vector<uint32_t> retval{};
 522   for(auto&& ubo : mUniformBlocks)
 523   {
 524     retval.emplace_back(ubo.binding);
 525   }
 526   return retval;
 527 }
 528
 529 std::string Reflection::GetUniformBlockName(uint32_t blockIndex) const
 530 {
 531   if(blockIndex < mUniformBlocks.size())
 532   {
 533     return mUniformBlocks[blockIndex].name;
 534   }
 535   else
 536   {
 537     return std::string();
 538   }
 539 }
 540
 541 uint32_t Reflection::GetUniformBlockMemberCount(uint32_t blockIndex) const
 542 {
 543   if(blockIndex < mUniformBlocks.size())
 544   {
 545     return static_cast<uint32_t>(mUniformBlocks[blockIndex].members.size());
 546   }
 547   else
 548   {
 549     return 0u;
 550   }
 551 }
 552
 553 std::string Reflection::GetUniformBlockMemberName(uint32_t blockIndex, uint32_t memberLocation) const
 554 {
 555   if(blockIndex < mUniformBlocks.size() && memberLocation < mUniformBlocks[blockIndex].members.size())
 556   {
 557     return mUniformBlocks[blockIndex].members[memberLocation].name;
 558   }
 559   else
 560   {
 561     return std::string();
 562   }
 563 }
 564
 565 uint32_t Reflection::GetUniformBlockMemberOffset(uint32_t blockIndex, uint32_t memberLocation) const
 566 {
 567   if(blockIndex < mUniformBlocks.size() && memberLocation < mUniformBlocks[blockIndex].members.size())
 568   {
 569     return mUniformBlocks[blockIndex].members[memberLocation].offset;
 570   }
 571   else
 572   {
 573     return 0u;
 574   }
 575 }
 576
 577 bool Reflection::GetNamedUniform(const std::string& name, Dali::Graphics::UniformInfo& out) const
 578 {
 579   auto index = 0u;
 580   for(auto&& ubo : mUniformBlocks)
 581   {
 582     for(auto&& member : ubo.members)
 583     {
 584       if(name == member.name || name == (ubo.name + "." + member.name))
 585       {
 586         out.name         = name;
 587         out.location     = member.location;
 588         out.binding      = ubo.binding;
 589         out.bufferIndex  = index;
 590         out.offset       = member.offset;
 591         out.uniformClass = Graphics::UniformClass::UNIFORM;
 592         return true;
 593       }
 594     }
 595     ++index;
 596   }
 597
 598   // check samplers
 599   index = 0u;
 600   for(auto&& uniform : mUniformOpaques)
 601   {
 602     if(uniform.name == name)
 603     {
 604       out.uniformClass = Graphics::UniformClass::COMBINED_IMAGE_SAMPLER;
 605       out.binding      = 0;
 606       out.name         = name;
 607       out.offset       = index;            // lexical location in shader
 608       out.location     = uniform.location; // uniform location mapping
 609       return true;
 610     }
 611     ++index;
 612   }
 613
 614   return false;
 615 }
 616
 617 std::vector<GLenum> Reflection::GetStandaloneUniformTypes() const
 618 {
 619   std::vector<GLenum> retval{};
 620   for(auto&& uniform : mStandaloneUniformExtraInfos)
 621   {
 622     retval.emplace_back(uniform.type);
 623   }
 624
 625   return retval;
 626 }
 627
 628 const std::vector<Reflection::UniformExtraInfo>& Reflection::GetStandaloneUniformExtraInfo() const
 629 {
 630   return mStandaloneUniformExtraInfos;
 631 }
 632
 633 const std::vector<Dali::Graphics::UniformInfo>& Reflection::GetSamplers() const
 634 {
 635   return mUniformOpaques;
 636 }
 637
 638 Graphics::ShaderLanguage Reflection::GetLanguage() const
 639 {
 640   auto version = Graphics::ShaderLanguage::GLSL_3_2;
 641
 642   auto gl = mController.GetGL();
 643   if(!gl)
 644   {
 645     // Do nothing during shutdown
 646     return version;
 647   }
 648
 649   int majorVersion, minorVersion;
 650   gl->GetIntegerv(GL_MAJOR_VERSION, &majorVersion);
 651   gl->GetIntegerv(GL_MINOR_VERSION, &minorVersion);
 652   DALI_LOG_RELEASE_INFO("GL Version (integer) : %d.%d\n", majorVersion, minorVersion);
 653   DALI_LOG_RELEASE_INFO("GLSL Version : %s\n", gl->GetString(GL_SHADING_LANGUAGE_VERSION));
 654
 655   // TODO: the language version is hardcoded for now, but we may use what we get
 656   // from GL_SHADING_LANGUAGE_VERSION?
 657   return version;
 658 }
 659
 660 void Reflection::SortOpaques()
 661 {
 662   //Determine declaration order of each sampler
 663   auto& programCreateInfo = mProgram.GetCreateInfo();
 664
 665   std::vector<uint8_t> data;
 666   std::string          vertShader;
 667   std::string          fragShader;
 668
 669   for(auto& shaderState : *programCreateInfo.shaderState)
 670   {
 671     if(shaderState.pipelineStage == PipelineStage::VERTEX_SHADER)
 672     {
 673       vertShader = GetShaderSource(shaderState);
 674     }
 675     else if(shaderState.pipelineStage == PipelineStage::FRAGMENT_SHADER)
 676     {
 677       fragShader = GetShaderSource(shaderState);
 678     }
 679   }
 680
 681   int              samplerPosition = 0;
 682   std::vector<int> samplerPositions(mUniformOpaques.size(), -1);
 683
 684   ParseShaderSamplers(vertShader, mUniformOpaques, samplerPosition, samplerPositions);
 685   ParseShaderSamplers(fragShader, mUniformOpaques, samplerPosition, samplerPositions);
 686
 687   std::sort(mUniformOpaques.begin(), mUniformOpaques.end(), [](const UniformInfo& a, const UniformInfo& b) { return a.offset < b.offset; });
 688 }
 689
 690 } // namespace Dali::Graphics::GLES