dali/internal/graphics/gles-impl/gles-context.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-context.h"
  19 #include <dali/integration-api/adaptor-framework/render-surface-interface.h>
  20 #include <dali/integration-api/gl-abstraction.h>
  21 #include <dali/integration-api/gl-defines.h>
  22 #include <dali/internal/graphics/common/graphics-interface.h>
  23
  24 #include "egl-graphics-controller.h"
  25 #include "gles-graphics-buffer.h"
  26 #include "gles-graphics-pipeline.h"
  27 #include "gles-graphics-program.h"
  28 #include "gles-graphics-render-pass.h"
  29 #include "gles-graphics-render-target.h"
  30
  31 namespace Dali::Graphics::GLES
  32 {
  33 struct Context::Impl
  34 {
  35   Impl(EglGraphicsController& controller)
  36   : mController(controller)
  37   {
  38   }
  39
  40   ~Impl() = default;
  41
  42   EglGraphicsController& mController;
  43
  44   const GLES::Pipeline* mCurrentPipeline{nullptr}; ///< Currently bound pipeline
  45   const GLES::Pipeline* mNewPipeline{nullptr};     ///< New pipeline to be set on flush
  46
  47   std::vector<Graphics::TextureBinding> mCurrentTextureBindings{};
  48   std::vector<Graphics::SamplerBinding> mCurrentSamplerBindings{};
  49   GLES::IndexBufferBindingDescriptor    mCurrentIndexBufferBinding{};
  50
  51   struct VertexBufferBinding
  52   {
  53     GLES::Buffer* buffer{nullptr};
  54     uint32_t      offset{0u};
  55   };
  56
  57   // Currently bound buffers
  58   std::vector<VertexBufferBindingDescriptor> mCurrentVertexBufferBindings{};
  59
  60   // Currently bound UBOs (check if it's needed per program!)
  61   std::vector<UniformBufferBindingDescriptor> mCurrentUBOBindings{};
  62   UniformBufferBindingDescriptor              mCurrentStandaloneUBOBinding{};
  63
  64   // Current render pass and render target
  65   const GLES::RenderTarget* mCurrentRenderTarget{nullptr};
  66   const GLES::RenderPass*   mCurrentRenderPass{nullptr};
  67 };
  68
  69 Context::Context(EglGraphicsController& controller)
  70 {
  71   mImpl = std::make_unique<Impl>(controller);
  72 }
  73
  74 Context::~Context() = default;
  75
  76 void Context::Flush(bool reset, const GLES::DrawCallDescriptor& drawCall)
  77 {
  78   auto& gl = *mImpl->mController.GetGL();
  79
  80   // Change pipeline
  81   if(mImpl->mNewPipeline)
  82   {
  83     // Execute states if different
  84     mImpl->mCurrentPipeline = mImpl->mNewPipeline;
  85     mImpl->mNewPipeline     = nullptr;
  86   }
  87   mImpl->mCurrentPipeline->GetPipeline().Bind(nullptr);
  88
  89   // Blend state
  90   ResolveBlendState();
  91
  92   // Resolve rasterization state
  93   ResolveRasterizationState();
  94
  95   // Resolve uniform buffers
  96   ResolveUniformBuffers();
  97
  98   // Bind textures
  99   // Map binding# to sampler location
 100   const auto program = static_cast<const GLES::Program*>(mImpl->mCurrentPipeline->GetCreateInfo().programState->program);
 101
 102   const auto& reflection = program->GetReflection();
 103   const auto& samplers   = reflection.GetSamplers();
 104   for(const auto& binding : mImpl->mCurrentTextureBindings)
 105   {
 106     auto texture = const_cast<GLES::Texture*>(static_cast<const GLES::Texture*>(binding.texture));
 107
 108     // Texture may not have been initialized yet...(tbm_surface timing issue?)
 109     if(!texture->GetGLTexture())
 110     {
 111       // Attempt to reinitialize
 112       // @todo need to put this somewhere else where it isn't const.
 113       // Maybe post it back on end of initialize queue if initialization fails?
 114       texture->InitializeResource();
 115     }
 116
 117     texture->Bind(binding);
 118     texture->Prepare(); // @todo also non-const.
 119
 120     if(binding.binding < samplers.size()) // binding maps to texture unit. (texture bindings should also be in binding order)
 121     {
 122       // Offset is set to the lexical offset within the frag shader, map it to the texture unit
 123       // @todo Explicitly set the texture unit through the graphics interface
 124       gl.Uniform1i(samplers[binding.binding].location, samplers[binding.binding].offset);
 125     }
 126   }
 127
 128   // for each attribute bind vertices
 129   const auto& pipelineState = mImpl->mCurrentPipeline->GetCreateInfo();
 130   const auto& vi            = pipelineState.vertexInputState;
 131   for(const auto& attr : vi->attributes)
 132   {
 133     // Enable location
 134     gl.EnableVertexAttribArray(attr.location);
 135     const auto& bufferSlot    = mImpl->mCurrentVertexBufferBindings[attr.binding];
 136     const auto& bufferBinding = vi->bufferBindings[attr.binding];
 137
 138     auto glesBuffer = bufferSlot.buffer->GetGLBuffer();
 139
 140     // Bind buffer
 141     gl.BindBuffer(GL_ARRAY_BUFFER, glesBuffer);
 142     gl.VertexAttribPointer(attr.location,
 143                            GLVertexFormat(attr.format).size,
 144                            GLVertexFormat(attr.format).format,
 145                            GL_FALSE,
 146                            bufferBinding.stride,
 147                            reinterpret_cast<void*>(attr.offset));
 148   }
 149
 150   // Resolve topology
 151   const auto& ia = mImpl->mCurrentPipeline->GetCreateInfo().inputAssemblyState;
 152
 153   // Bind uniforms
 154
 155   // Resolve draw call
 156   switch(drawCall.type)
 157   {
 158     case DrawCallDescriptor::Type::DRAW:
 159     {
 160       gl.DrawArrays(GLESTopology(ia->topology),
 161                     drawCall.draw.firstVertex,
 162                     drawCall.draw.vertexCount);
 163       break;
 164     }
 165     case DrawCallDescriptor::Type::DRAW_INDEXED:
 166     {
 167       const auto& binding    = mImpl->mCurrentIndexBufferBinding;
 168       const auto* glesBuffer = binding.buffer;
 169       gl.BindBuffer(GL_ELEMENT_ARRAY_BUFFER, glesBuffer->GetGLBuffer());
 170       auto indexBufferFormat = GLIndexFormat(binding.format).format;
 171       gl.DrawElements(GLESTopology(ia->topology),
 172                       drawCall.drawIndexed.indexCount,
 173                       indexBufferFormat,
 174                       reinterpret_cast<void*>(binding.offset));
 175       break;
 176     }
 177     case DrawCallDescriptor::Type::DRAW_INDEXED_INDIRECT:
 178     {
 179       break;
 180     }
 181   }
 182
 183   ClearState();
 184 }
 185
 186 void Context::BindTextures(const std::vector<Graphics::TextureBinding>& bindings)
 187 {
 188   // for each texture allocate slot
 189   for(const auto& binding : bindings)
 190   {
 191     // Resize binding array if needed
 192     if(mImpl->mCurrentTextureBindings.size() <= binding.binding)
 193     {
 194       mImpl->mCurrentTextureBindings.resize(binding.binding + 1);
 195     }
 196     // Store the binding details
 197     mImpl->mCurrentTextureBindings[binding.binding] = binding;
 198   }
 199 }
 200
 201 void Context::BindVertexBuffers(const std::vector<GLES::VertexBufferBindingDescriptor>& bindings)
 202 {
 203   if(bindings.size() > mImpl->mCurrentVertexBufferBindings.size())
 204   {
 205     mImpl->mCurrentVertexBufferBindings.resize(bindings.size());
 206   }
 207   // Copy only set slots
 208   std::copy_if(bindings.begin(), bindings.end(), mImpl->mCurrentVertexBufferBindings.begin(), [](auto& item) {
 209     return (nullptr != item.buffer);
 210   });
 211 }
 212
 213 void Context::BindIndexBuffer(const IndexBufferBindingDescriptor& indexBufferBinding)
 214 {
 215   mImpl->mCurrentIndexBufferBinding = indexBufferBinding;
 216 }
 217
 218 void Context::BindPipeline(const GLES::Pipeline* newPipeline)
 219 {
 220   mImpl->mNewPipeline = newPipeline;
 221 }
 222
 223 void Context::BindUniformBuffers(const std::vector<UniformBufferBindingDescriptor>& uboBindings,
 224                                  const UniformBufferBindingDescriptor&              standaloneBindings)
 225 {
 226   if(standaloneBindings.buffer)
 227   {
 228     mImpl->mCurrentStandaloneUBOBinding = standaloneBindings;
 229   }
 230
 231   if(uboBindings.size() >= mImpl->mCurrentUBOBindings.size())
 232   {
 233     mImpl->mCurrentUBOBindings.resize(uboBindings.size() + 1);
 234   }
 235
 236   auto it = uboBindings.begin();
 237   for(auto i = 0u; i < uboBindings.size(); ++i)
 238   {
 239     if(it->buffer)
 240     {
 241       mImpl->mCurrentUBOBindings[i] = *it;
 242     }
 243   }
 244 }
 245
 246 void Context::ResolveBlendState()
 247 {
 248   const auto& state = mImpl->mCurrentPipeline->GetCreateInfo();
 249   const auto& bs    = state.colorBlendState;
 250   auto&       gl    = *mImpl->mController.GetGL();
 251
 252   // TODO: prevent leaking the state
 253   if(!bs)
 254   {
 255     return;
 256   }
 257
 258   bs->blendEnable ? gl.Enable(GL_BLEND) : gl.Disable(GL_BLEND);
 259   if(!bs->blendEnable)
 260   {
 261     return;
 262   }
 263
 264   gl.BlendFunc(GLBlendFunc(bs->srcColorBlendFactor), GLBlendFunc(bs->dstColorBlendFactor));
 265
 266   if((GLBlendFunc(bs->srcColorBlendFactor) == GLBlendFunc(bs->srcAlphaBlendFactor)) &&
 267      (GLBlendFunc(bs->dstColorBlendFactor) == GLBlendFunc(bs->dstAlphaBlendFactor)))
 268   {
 269     gl.BlendFunc(GLBlendFunc(bs->srcColorBlendFactor), GLBlendFunc(bs->dstColorBlendFactor));
 270   }
 271   else
 272   {
 273     gl.BlendFuncSeparate(GLBlendFunc(bs->srcColorBlendFactor),
 274                          GLBlendFunc(bs->dstColorBlendFactor),
 275                          GLBlendFunc(bs->srcAlphaBlendFactor),
 276                          GLBlendFunc(bs->dstAlphaBlendFactor));
 277   }
 278   if(GLBlendOp(bs->colorBlendOp) == GLBlendOp(bs->alphaBlendOp))
 279   {
 280     gl.BlendEquation(GLBlendOp(bs->colorBlendOp));
 281   }
 282   else
 283   {
 284     gl.BlendEquationSeparate(GLBlendOp(bs->colorBlendOp), GLBlendOp(bs->alphaBlendOp));
 285   }
 286 }
 287
 288 void Context::ResolveRasterizationState()
 289 {
 290   const auto& state = mImpl->mCurrentPipeline->GetCreateInfo();
 291   const auto& rs    = state.rasterizationState;
 292   auto&       gl    = *mImpl->mController.GetGL();
 293
 294   // TODO: prevent leaking the state
 295   if(!rs)
 296   {
 297     return;
 298   }
 299
 300   if(rs->cullMode == CullMode::NONE)
 301   {
 302     gl.Disable(GL_CULL_FACE);
 303   }
 304   else
 305   {
 306     gl.Enable(GL_CULL_FACE);
 307     gl.CullFace(GLCullMode(rs->cullMode));
 308   }
 309
 310   // TODO: implement polygon mode (fill, line, points)
 311   //       seems like we don't support it (no glPolygonMode())
 312 }
 313
 314 void Context::ResolveUniformBuffers()
 315 {
 316   // Resolve standalone uniforms if we have binding
 317   if(mImpl->mCurrentStandaloneUBOBinding.buffer)
 318   {
 319     ResolveStandaloneUniforms();
 320   }
 321 }
 322
 323 void Context::ResolveStandaloneUniforms()
 324 {
 325   auto& gl = *mImpl->mController.GetGL();
 326
 327   // Find reflection for program
 328   const auto program = static_cast<const GLES::Program*>(mImpl->mCurrentPipeline->GetCreateInfo().programState->program);
 329
 330   const auto& reflection = program->GetReflection();
 331
 332   auto extraInfos = reflection.GetStandaloneUniformExtraInfo();
 333
 334   const auto ptr = reinterpret_cast<const char*>(mImpl->mCurrentStandaloneUBOBinding.buffer->GetCPUAllocatedAddress());
 335
 336   for(const auto& info : extraInfos)
 337   {
 338     auto type   = GLTypeConversion(info.type).type;
 339     auto offset = info.offset;
 340     switch(type)
 341     {
 342       case GLType::FLOAT_VEC2:
 343       {
 344         gl.Uniform2fv(info.location, info.arraySize, reinterpret_cast<const float*>(&ptr[offset]));
 345         break;
 346       }
 347       case GLType::FLOAT_VEC3:
 348       {
 349         gl.Uniform3fv(info.location, info.arraySize, reinterpret_cast<const float*>(&ptr[offset]));
 350         break;
 351       }
 352       case GLType::FLOAT_VEC4:
 353       {
 354         gl.Uniform4fv(info.location, info.arraySize, reinterpret_cast<const float*>(&ptr[offset]));
 355         break;
 356       }
 357       case GLType::INT_VEC2:
 358       {
 359         gl.Uniform2iv(info.location, info.arraySize, reinterpret_cast<const GLint*>(&ptr[offset]));
 360         break;
 361       }
 362       case GLType::INT_VEC3:
 363       {
 364         gl.Uniform3iv(info.location, info.arraySize, reinterpret_cast<const GLint*>(&ptr[offset]));
 365         break;
 366       }
 367       case GLType::INT_VEC4:
 368       {
 369         gl.Uniform4iv(info.location, info.arraySize, reinterpret_cast<const GLint*>(&ptr[offset]));
 370         break;
 371       }
 372       case GLType::BOOL:
 373       {
 374         // not supported by DALi
 375         break;
 376       }
 377       case GLType::BOOL_VEC2:
 378       {
 379         // not supported by DALi
 380         break;
 381       }
 382       case GLType::BOOL_VEC3:
 383       {
 384         // not supported by DALi
 385         break;
 386       }
 387       case GLType::BOOL_VEC4:
 388       {
 389         // not supported by DALi
 390         break;
 391       }
 392       case GLType::FLOAT:
 393       {
 394         gl.Uniform1fv(info.location, info.arraySize, reinterpret_cast<const float*>(&ptr[offset]));
 395         break;
 396       }
 397       case GLType::FLOAT_MAT2:
 398       {
 399         gl.UniformMatrix2fv(info.location, info.arraySize, GL_FALSE, reinterpret_cast<const float*>(&ptr[offset]));
 400         break;
 401       }
 402       case GLType::FLOAT_MAT3:
 403       {
 404         gl.UniformMatrix3fv(info.location, info.arraySize, GL_FALSE, reinterpret_cast<const float*>(&ptr[offset]));
 405         break;
 406       }
 407       case GLType::FLOAT_MAT4:
 408       {
 409         gl.UniformMatrix4fv(info.location, info.arraySize, GL_FALSE, reinterpret_cast<const float*>(&ptr[offset]));
 410         break;
 411       }
 412       case GLType::SAMPLER_2D:
 413       {
 414         break;
 415       }
 416       case GLType::SAMPLER_CUBE:
 417       {
 418         break;
 419       }
 420       default:
 421       {
 422       }
 423     }
 424   }
 425 }
 426
 427 void Context::BeginRenderPass(const BeginRenderPassDescriptor& renderPassBegin)
 428 {
 429   auto& renderPass   = *renderPassBegin.renderPass;
 430   auto& renderTarget = *renderPassBegin.renderTarget;
 431
 432   const auto& targetInfo = renderTarget.GetCreateInfo();
 433
 434   auto& gl       = *mImpl->mController.GetGL();
 435   auto& graphics = *mImpl->mController.GetGraphicsInterface();
 436
 437   if(targetInfo.surface)
 438   {
 439     // Bind surface FB
 440     gl.BindFramebuffer(GL_FRAMEBUFFER, 0);
 441   }
 442   else if(targetInfo.framebuffer)
 443   {
 444     // bind framebuffer and swap.
 445     renderTarget.GetFramebuffer()->Bind();
 446   }
 447
 448   // clear (ideally cache the setup)
 449
 450   // In GL we assume that the last attachment is depth/stencil (we may need
 451   // to cache extra information inside GLES RenderTarget if we want to be
 452   // more specific in case of MRT)
 453
 454   const auto& attachments = *renderPass.GetCreateInfo().attachments;
 455   const auto& color0      = attachments[0];
 456   GLuint      mask        = 0;
 457   if(color0.loadOp == AttachmentLoadOp::CLEAR)
 458   {
 459     mask |= GL_COLOR_BUFFER_BIT;
 460
 461     // Set clear color (todo: cache it!)
 462     // Something goes wrong here if Alpha mask is GL_TRUE
 463     gl.ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
 464     gl.ClearColor(renderPassBegin.clearValues[0].color.r,
 465                   renderPassBegin.clearValues[0].color.g,
 466                   renderPassBegin.clearValues[0].color.b,
 467                   renderPassBegin.clearValues[0].color.a);
 468   }
 469
 470   // check for depth stencil
 471   if(attachments.size() > 1)
 472   {
 473     const auto& depthStencil = attachments.back();
 474     if(depthStencil.loadOp == AttachmentLoadOp::CLEAR)
 475     {
 476       mask |= GL_DEPTH_BUFFER_BIT;
 477     }
 478     if(depthStencil.stencilLoadOp == AttachmentLoadOp::CLEAR)
 479     {
 480       mask |= GL_STENCIL_BUFFER_BIT;
 481     }
 482   }
 483
 484   gl.Enable(GL_SCISSOR_TEST);
 485   gl.Scissor(renderPassBegin.renderArea.x, renderPassBegin.renderArea.y, renderPassBegin.renderArea.width, renderPassBegin.renderArea.height);
 486   gl.Clear(mask);
 487   gl.Disable(GL_SCISSOR_TEST);
 488
 489   mImpl->mCurrentRenderPass   = &renderPass;
 490   mImpl->mCurrentRenderTarget = &renderTarget;
 491 }
 492
 493 void Context::EndRenderPass()
 494 {
 495   if(mImpl->mCurrentRenderTarget)
 496   {
 497     if(mImpl->mCurrentRenderTarget->GetFramebuffer())
 498     {
 499       auto& gl = *mImpl->mController.GetGL();
 500       gl.Flush();
 501     }
 502   }
 503 }
 504
 505 void Context::ClearState()
 506 {
 507   mImpl->mCurrentTextureBindings.clear();
 508 }
 509
 510 } // namespace Dali::Graphics::GLES