kc3-lang/angle/src/libANGLE/TransformFeedback.cpp

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• Author : Jamie Madill
  Date : 2017-09-14 22:20:29
  Hash : 71c88b31
  Message : Enable [[nodiscard]] for gl::Error. This forces all return values to be checked for gl::Error. Requires quite a bit of minor refactoring. I also added a macro to swallow an error without returning from a function. We could look at storing the errors in the Context at some point, since almost always when we're generating errors that we need to discard we have access to the Context as a parameter. BUG=angleproject:2150 Change-Id: I457e48a30c002eda0993acbcd3180ba87bf169fb Reviewed-on: https://chromium-review.googlesource.com/665173 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

• src/libANGLE/TransformFeedback.cpp

• //
  // Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #include "libANGLE/TransformFeedback.h"
  
  #include "libANGLE/Buffer.h"
  #include "libANGLE/Caps.h"
  #include "libANGLE/ContextState.h"
  #include "libANGLE/Program.h"
  #include "libANGLE/renderer/GLImplFactory.h"
  #include "libANGLE/renderer/TransformFeedbackImpl.h"
  
  namespace gl
  {
  
  TransformFeedbackState::TransformFeedbackState(size_t maxIndexedBuffers)
      : mLabel(),
        mActive(false),
        mPrimitiveMode(GL_NONE),
        mPaused(false),
        mProgram(nullptr),
        mGenericBuffer(),
        mIndexedBuffers(maxIndexedBuffers)
  {
  }
  
  const BindingPointer<Buffer> &TransformFeedbackState::getGenericBuffer() const
  {
      return mGenericBuffer;
  }
  
  const OffsetBindingPointer<Buffer> &TransformFeedbackState::getIndexedBuffer(size_t idx) const
  {
      return mIndexedBuffers[idx];
  }
  
  const std::vector<OffsetBindingPointer<Buffer>> &TransformFeedbackState::getIndexedBuffers() const
  {
      return mIndexedBuffers;
  }
  
  TransformFeedback::TransformFeedback(rx::GLImplFactory *implFactory, GLuint id, const Caps &caps)
      : RefCountObject(id),
        mState(caps.maxTransformFeedbackSeparateAttributes),
        mImplementation(implFactory->createTransformFeedback(mState))
  {
      ASSERT(mImplementation != nullptr);
  }
  
  Error TransformFeedback::onDestroy(const Context *context)
  {
      if (mState.mProgram)
      {
          mState.mProgram->release(context);
          mState.mProgram = nullptr;
      }
  
      ASSERT(!mState.mProgram);
      mState.mGenericBuffer.set(context, nullptr);
      for (size_t i = 0; i < mState.mIndexedBuffers.size(); i++)
      {
          mState.mIndexedBuffers[i].set(context, nullptr);
      }
  
      return NoError();
  }
  
  TransformFeedback::~TransformFeedback()
  {
      SafeDelete(mImplementation);
  }
  
  void TransformFeedback::setLabel(const std::string &label)
  {
      mState.mLabel = label;
  }
  
  const std::string &TransformFeedback::getLabel() const
  {
      return mState.mLabel;
  }
  
  void TransformFeedback::begin(const Context *context, GLenum primitiveMode, Program *program)
  {
      mState.mActive        = true;
      mState.mPrimitiveMode = primitiveMode;
      mState.mPaused        = false;
      mImplementation->begin(primitiveMode);
      bindProgram(context, program);
  }
  
  void TransformFeedback::end(const Context *context)
  {
      mState.mActive        = false;
      mState.mPrimitiveMode = GL_NONE;
      mState.mPaused        = false;
      mImplementation->end();
      if (mState.mProgram)
      {
          mState.mProgram->release(context);
          mState.mProgram = nullptr;
      }
  }
  
  void TransformFeedback::pause()
  {
      mState.mPaused = true;
      mImplementation->pause();
  }
  
  void TransformFeedback::resume()
  {
      mState.mPaused = false;
      mImplementation->resume();
  }
  
  bool TransformFeedback::isActive() const
  {
      return mState.mActive;
  }
  
  bool TransformFeedback::isPaused() const
  {
      return mState.mPaused;
  }
  
  GLenum TransformFeedback::getPrimitiveMode() const
  {
      return mState.mPrimitiveMode;
  }
  
  void TransformFeedback::bindProgram(const Context *context, Program *program)
  {
      if (mState.mProgram != program)
      {
          if (mState.mProgram != nullptr)
          {
              mState.mProgram->release(context);
          }
          mState.mProgram = program;
          if (mState.mProgram != nullptr)
          {
              mState.mProgram->addRef();
          }
      }
  }
  
  bool TransformFeedback::hasBoundProgram(GLuint program) const
  {
      return mState.mProgram != nullptr && mState.mProgram->id() == program;
  }
  
  void TransformFeedback::bindGenericBuffer(const Context *context, Buffer *buffer)
  {
      mState.mGenericBuffer.set(context, buffer);
      mImplementation->bindGenericBuffer(mState.mGenericBuffer);
  }
  
  void TransformFeedback::detachBuffer(const Context *context, GLuint bufferName)
  {
      for (size_t index = 0; index < mState.mIndexedBuffers.size(); index++)
      {
          if (mState.mIndexedBuffers[index].id() == bufferName)
          {
              mState.mIndexedBuffers[index].set(context, nullptr);
              mImplementation->bindIndexedBuffer(index, mState.mIndexedBuffers[index]);
          }
      }
  
      if (mState.mGenericBuffer.id() == bufferName)
      {
          mState.mGenericBuffer.set(context, nullptr);
          mImplementation->bindGenericBuffer(mState.mGenericBuffer);
      }
  }
  
  const BindingPointer<Buffer> &TransformFeedback::getGenericBuffer() const
  {
      return mState.mGenericBuffer;
  }
  
  void TransformFeedback::bindIndexedBuffer(const Context *context,
                                            size_t index,
                                            Buffer *buffer,
                                            size_t offset,
                                            size_t size)
  {
      ASSERT(index < mState.mIndexedBuffers.size());
      mState.mIndexedBuffers[index].set(context, buffer, offset, size);
      mImplementation->bindIndexedBuffer(index, mState.mIndexedBuffers[index]);
  }
  
  const OffsetBindingPointer<Buffer> &TransformFeedback::getIndexedBuffer(size_t index) const
  {
      ASSERT(index < mState.mIndexedBuffers.size());
      return mState.mIndexedBuffers[index];
  }
  
  size_t TransformFeedback::getIndexedBufferCount() const
  {
      return mState.mIndexedBuffers.size();
  }
  
  rx::TransformFeedbackImpl *TransformFeedback::getImplementation()
  {
      return mImplementation;
  }
  
  const rx::TransformFeedbackImpl *TransformFeedback::getImplementation() const
  {
      return mImplementation;
  }
  
  }