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

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• Hash : 6c1f671b
  Author :
  Date : 2017-02-14T19:08:04
  

  Add destroy hooks for several GL objects.
  
  These hooks allow the back-end renderer to free object resources
  without having to store pointers to shared device handles for
  each and every object. This will allow us to save memory on
  back-ends that really care about memory overhead.
  
  There is a downside in that there is more boilerplate in passing
  gl::Context handles around everywhere.
  
  BUG=angleproject:1684
  
  Change-Id: I89463bba8d23f92920e8956650cb73c7fc6d66b7
  Reviewed-on: https://chromium-review.googlesource.com/426401
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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• 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);
  }
  
  void TransformFeedback::destroy(const Context *context)
  {
      if (mState.mProgram)
      {
          mState.mProgram->release(context);
          mState.mProgram = nullptr;
      }
  }
  
  TransformFeedback::~TransformFeedback()
  {
      ASSERT(!mState.mProgram);
      mState.mGenericBuffer.set(nullptr);
      for (size_t i = 0; i < mState.mIndexedBuffers.size(); i++)
      {
          mState.mIndexedBuffers[i].set(nullptr);
      }
  
      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(Buffer *buffer)
  {
      mState.mGenericBuffer.set(buffer);
      mImplementation->bindGenericBuffer(mState.mGenericBuffer);
  }
  
  void TransformFeedback::detachBuffer(GLuint bufferName)
  {
      for (size_t index = 0; index < mState.mIndexedBuffers.size(); index++)
      {
          if (mState.mIndexedBuffers[index].id() == bufferName)
          {
              mState.mIndexedBuffers[index].set(nullptr);
              mImplementation->bindIndexedBuffer(index, mState.mIndexedBuffers[index]);
          }
      }
  
      if (mState.mGenericBuffer.id() == bufferName)
      {
          mState.mGenericBuffer.set(nullptr);
          mImplementation->bindGenericBuffer(mState.mGenericBuffer);
      }
  }
  
  const BindingPointer<Buffer> &TransformFeedback::getGenericBuffer() const
  {
      return mState.mGenericBuffer;
  }
  
  void TransformFeedback::bindIndexedBuffer(size_t index, Buffer *buffer, size_t offset, size_t size)
  {
      ASSERT(index < mState.mIndexedBuffers.size());
      mState.mIndexedBuffers[index].set(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;
  }
  
  }
  

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