kc3-lang/angle/src/libGLESv2/Fence.cpp

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• Author : daniel@transgaming.com
  Date : 2012-10-31 19:55:33
  Hash : 76d3e6e0
  Message : Rename renderer namespace to rx Trac #21999 Author: Shannon Woods Signed-off-by: Daniel Koch git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1379 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/libGLESv2/Fence.cpp

• //
  // Copyright (c) 2002-2010 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.
  //
  
  // Fence.cpp: Implements the gl::Fence class, which supports the GL_NV_fence extension.
  
  #include "libGLESv2/Fence.h"
  
  #include "libGLESv2/main.h"
  
  namespace gl
  {
  
  Fence::Fence(rx::Renderer9 *renderer)
  {
      mRenderer = renderer;
      mQuery = NULL;
      mCondition = GL_NONE;
      mStatus = GL_FALSE;
  }
  
  Fence::~Fence()
  {
      if (mQuery != NULL)
      {
          mRenderer->freeEventQuery(mQuery);
      }
  }
  
  GLboolean Fence::isFence()
  {
      // GL_NV_fence spec:
      // A name returned by GenFencesNV, but not yet set via SetFenceNV, is not the name of an existing fence.
      return mQuery != NULL;
  }
  
  // D3D9_REPLACE
  void Fence::setFence(GLenum condition)
  {
      if (!mQuery)
      {
          mQuery = mRenderer->allocateEventQuery();
          if (!mQuery)
          {
              return error(GL_OUT_OF_MEMORY);
          }
      }
  
      HRESULT result = mQuery->Issue(D3DISSUE_END);
      ASSERT(SUCCEEDED(result));
  
      mCondition = condition;
      mStatus = GL_FALSE;
  }
  
  // D3D9_REPLACE
  GLboolean Fence::testFence()
  {
      if (mQuery == NULL)
      {
          return error(GL_INVALID_OPERATION, GL_TRUE);
      }
  
      HRESULT result = mQuery->GetData(NULL, 0, D3DGETDATA_FLUSH);
  
      if (checkDeviceLost(result))
      {
         return error(GL_OUT_OF_MEMORY, GL_TRUE);
      }
  
      ASSERT(result == S_OK || result == S_FALSE);
      mStatus = result == S_OK;
      return mStatus;
  }
  
  void Fence::finishFence()
  {
      if (mQuery == NULL)
      {
          return error(GL_INVALID_OPERATION);
      }
  
      while (!testFence())
      {
          Sleep(0);
      }
  }
  
  void Fence::getFenceiv(GLenum pname, GLint *params)
  {
      if (mQuery == NULL)
      {
          return error(GL_INVALID_OPERATION);
      }
  
      switch (pname)
      {
          case GL_FENCE_STATUS_NV:
          {
              // GL_NV_fence spec:
              // Once the status of a fence has been finished (via FinishFenceNV) or tested and the returned status is TRUE (via either TestFenceNV
              // or GetFenceivNV querying the FENCE_STATUS_NV), the status remains TRUE until the next SetFenceNV of the fence.
              if (mStatus)
              {
                  params[0] = GL_TRUE;
                  return;
              }
              
              HRESULT result = mQuery->GetData(NULL, 0, 0); // D3D9_REPLACE
              
              if (checkDeviceLost(result))
              {
                  params[0] = GL_TRUE;
                  return error(GL_OUT_OF_MEMORY);
              }
  
              ASSERT(result == S_OK || result == S_FALSE);
              mStatus = result == S_OK;
              params[0] = mStatus;
              
              break;
          }
          case GL_FENCE_CONDITION_NV:
              params[0] = mCondition;
              break;
          default:
              return error(GL_INVALID_ENUM);
              break;
      }
  }
  
  }