kc3-lang/angle/src/libANGLE/renderer/gl/TransformFeedbackGL.cpp

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• Hash : 1a683460
  Author :
  Date : 2015-09-29T15:09:59
  

  Implement TransformFeedbackGL.
  
  Reland with supression for TransformFeedbackTest.MultiContext on Linux
  AMD.
  
  BUG=angleproject:889
  
  Change-Id: I6f2a2e856dacf16308de222dd0936bedbb3b175c
  Reviewed-on: https://chromium-review.googlesource.com/307871
  Tryjob-Request: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Tested-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/renderer/gl/TransformFeedbackGL.cpp

• //
  // Copyright 2015 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.
  //
  
  // TransformFeedbackGL.cpp: Implements the class methods for TransformFeedbackGL.
  
  #include "libANGLE/renderer/gl/TransformFeedbackGL.h"
  
  #include "common/debug.h"
  #include "libANGLE/Data.h"
  #include "libANGLE/renderer/gl/BufferGL.h"
  #include "libANGLE/renderer/gl/FunctionsGL.h"
  #include "libANGLE/renderer/gl/StateManagerGL.h"
  
  namespace rx
  {
  
  TransformFeedbackGL::TransformFeedbackGL(const FunctionsGL *functions,
                                           StateManagerGL *stateManager,
                                           size_t maxTransformFeedbackBufferBindings)
      : TransformFeedbackImpl(),
        mFunctions(functions),
        mStateManager(stateManager),
        mTransformFeedbackID(0),
        mIsActive(false),
        mIsPaused(false),
        mCurrentIndexedBuffers(maxTransformFeedbackBufferBindings)
  {
      mFunctions->genTransformFeedbacks(1, &mTransformFeedbackID);
  }
  
  TransformFeedbackGL::~TransformFeedbackGL()
  {
      mStateManager->deleteTransformFeedback(mTransformFeedbackID);
      mTransformFeedbackID = 0;
  
      for (auto &bufferBinding : mCurrentIndexedBuffers)
      {
          bufferBinding.set(nullptr);
      }
  }
  
  void TransformFeedbackGL::begin(GLenum primitiveMode)
  {
      // Do not begin directly, StateManagerGL will handle beginning and resuming transform feedback.
  }
  
  void TransformFeedbackGL::end()
  {
      syncActiveState(false, GL_NONE);
  }
  
  void TransformFeedbackGL::pause()
  {
      syncPausedState(true);
  }
  
  void TransformFeedbackGL::resume()
  {
      // Do not resume directly, StateManagerGL will handle beginning and resuming transform feedback.
  }
  
  void TransformFeedbackGL::bindGenericBuffer(const BindingPointer<gl::Buffer> &binding)
  {
  }
  
  void TransformFeedbackGL::bindIndexedBuffer(size_t index, const OffsetBindingPointer<gl::Buffer> &binding)
  {
      // Directly bind buffer (not through the StateManager methods) because the buffer bindings are
      // tracked per transform feedback object
      if (binding != mCurrentIndexedBuffers[index])
      {
          mStateManager->bindTransformFeedback(GL_TRANSFORM_FEEDBACK, mTransformFeedbackID);
          if (binding.get() != nullptr)
          {
              const BufferGL *bufferGL = GetImplAs<BufferGL>(binding.get());
              if (binding.getSize() != 0)
              {
                  mFunctions->bindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER,
                                              static_cast<GLuint>(index), bufferGL->getBufferID(),
                                              binding.getOffset(), binding.getSize());
              }
              else
              {
                  mFunctions->bindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, static_cast<GLuint>(index),
                                             bufferGL->getBufferID());
              }
          }
          else
          {
              mFunctions->bindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, static_cast<GLuint>(index), 0);
          }
  
          mCurrentIndexedBuffers[index] = binding;
      }
  }
  
  GLuint TransformFeedbackGL::getTransformFeedbackID() const
  {
      return mTransformFeedbackID;
  }
  
  void TransformFeedbackGL::syncActiveState(bool active, GLenum primitiveMode) const
  {
      if (mIsActive != active)
      {
          mIsActive = active;
          mIsPaused = false;
  
          mStateManager->bindTransformFeedback(GL_TRANSFORM_FEEDBACK, mTransformFeedbackID);
          if (mIsActive)
          {
              mFunctions->beginTransformFeedback(primitiveMode);
          }
          else
          {
              mFunctions->endTransformFeedback();
          }
      }
  }
  
  void TransformFeedbackGL::syncPausedState(bool paused) const
  {
      if (mIsActive && mIsPaused != paused)
      {
          mIsPaused = paused;
  
          mStateManager->bindTransformFeedback(GL_TRANSFORM_FEEDBACK, mTransformFeedbackID);
          if (mIsPaused)
          {
              mFunctions->pauseTransformFeedback();
          }
          else
          {
              mFunctions->resumeTransformFeedback();
          }
      }
  }
  
  }
  

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