C++ CommandQueue::enqueueAcquireGLObjects方法代码示例

void procOCL_OCV(int tex, int w, int h)
{
    int64_t t = getTimeMs();
    cl::ImageGL imgIn (theContext, CL_MEM_READ_ONLY,  GL_TEXTURE_2D, 0, tex);
    std::vector < cl::Memory > images(1, imgIn);
    theQueue.enqueueAcquireGLObjects(&images);
    theQueue.finish();
    cv::UMat uIn, uOut, uTmp;
    cv::ocl::convertFromImage(imgIn(), uIn);
    LOGD("loading texture data to OpenCV UMat costs %d ms", getTimeInterval(t));
    theQueue.enqueueReleaseGLObjects(&images);

    t = getTimeMs();
    //cv::blur(uIn, uOut, cv::Size(5, 5));
    cv::Laplacian(uIn, uTmp, CV_8U);
    cv:multiply(uTmp, 10, uOut);
    cv::ocl::finish();
    LOGD("OpenCV processing costs %d ms", getTimeInterval(t));

    t = getTimeMs();
    cl::ImageGL imgOut(theContext, CL_MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, tex);
    images.clear();
    images.push_back(imgOut);
    theQueue.enqueueAcquireGLObjects(&images);
    cl_mem clBuffer = (cl_mem)uOut.handle(cv::ACCESS_READ);
    cl_command_queue q = (cl_command_queue)cv::ocl::Queue::getDefault().ptr();
    size_t offset = 0;
    size_t origin[3] = { 0, 0, 0 };
    size_t region[3] = { w, h, 1 };
    CV_Assert(clEnqueueCopyBufferToImage (q, clBuffer, imgOut(), offset, origin, region, 0, NULL, NULL) == CL_SUCCESS);
    theQueue.enqueueReleaseGLObjects(&images);
    cv::ocl::finish();
    LOGD("uploading results to texture costs %d ms", getTimeInterval(t));
}

void procOCL_I2I(int texIn, int texOut, int w, int h)
{
    if(!haveOpenCL) return;

    LOGD("procOCL_I2I(%d, %d, %d, %d)", texIn, texOut, w, h);
    cl::ImageGL imgIn (theContext, CL_MEM_READ_ONLY,  GL_TEXTURE_2D, 0, texIn);
    cl::ImageGL imgOut(theContext, CL_MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, texOut);
    std::vector < cl::Memory > images;
    images.push_back(imgIn);
    images.push_back(imgOut);

    int64_t t = getTimeMs();
    theQueue.enqueueAcquireGLObjects(&images);
    theQueue.finish();
    LOGD("enqueueAcquireGLObjects() costs %d ms", getTimeInterval(t));

    t = getTimeMs();
    cl::Kernel Laplacian(theProgI2I, "Laplacian"); //TODO: may be done once
    Laplacian.setArg(0, imgIn);
    Laplacian.setArg(1, imgOut);
    theQueue.finish();
    LOGD("Kernel() costs %d ms", getTimeInterval(t));

    t = getTimeMs();
    theQueue.enqueueNDRangeKernel(Laplacian, cl::NullRange, cl::NDRange(w, h), cl::NullRange);
    theQueue.finish();
    LOGD("enqueueNDRangeKernel() costs %d ms", getTimeInterval(t));

    t = getTimeMs();
    theQueue.enqueueReleaseGLObjects(&images);
    theQueue.finish();
    LOGD("enqueueReleaseGLObjects() costs %d ms", getTimeInterval(t));
}

    void updateParticles(float timeDelta)
    {
        try
        {
            vector<cl::Memory> glBuffers;
            glBuffers.push_back(m_positions);
            glBuffers.push_back(m_colors);
            
            //this will update our system by calculating new velocity and updating the positions of our particles
            //Make sure OpenGL is done using our VBOs
            glFinish();
            
            // map OpenGL buffer object for writing from OpenCL
            // this passes in the vector of VBO buffer objects (position and color)
            m_queue.enqueueAcquireGLObjects(&glBuffers);
            
            m_particleKernel.setArg(5, timeDelta); //pass in the timestep
            
            //execute the kernel
            m_queue.enqueueNDRangeKernel(m_particleKernel, cl::NullRange, cl::NDRange(m_numParticles),
                                         cl::NullRange);
            //Release the VBOs so OpenGL can play with them
            m_queue.enqueueReleaseGLObjects(&glBuffers, NULL);

            m_queue.finish();
        }
        catch(cl::Error &error)
        {
            LOG_ERROR << error.what() << "(" << oclErrorString(error.err()) << ")";
        }
    }

void MetaBallsApp::update()
{
    std::vector<cl::Memory> acquire( { mClParticleBuf, mClMarchingRenderBuffer, mClMarchingDebugBuffer } );
    mClCommandQueue.enqueueAcquireGLObjects( &acquire );
    updateParticles();
    updateMarching();
    mClCommandQueue.enqueueReleaseGLObjects( &acquire );
}

void PTWeekend::draw()
{
    /*
     * BEGIN - each frame part
     */
    
    /* Enqueue kernel for execution */
    
    glm::vec3 origin,lower_left, hor, ver;
    
    float theta = camera.getFov() * M_PI / 180.0f;
    float half_height = tan(theta / 2.0f);
    float half_width = camera.getAspectRatio() * half_height;
    
    origin = camera.getEyePoint();
    glm::vec3 u, v, w;
    
    w = -glm::normalize(camera.getViewDirection()); //odd...
    u = glm::normalize(glm::cross(glm::vec3(0,1,0), w));
    v = glm::cross(w, u);
    
    lower_left = origin - half_width * u - half_height * v - w;
    hor = 2.0f * half_width * u;
    ver = 2.0f * half_height * v;
    
    pt_assert(cl_set_pinhole_cam_arg(origin, lower_left, hor, ver, cam_buffer, cmd_queue), "Could not fill camera buffer");
    
    clStatus = cmd_queue.enqueueAcquireGLObjects(&img_buffer, NULL, NULL);
    pt_assert(clStatus, "Could not acquire gl objects");
    
    cl::Event profiling_evt;
    
    
    
    clStatus = cmd_queue.enqueueNDRangeKernel(kernel,
                                              cl::NDRange(0,0),
                                              cl::NDRange(img_width, img_height),
                                              cl::NDRange(local_width,local_height),
                                              NULL,
                                              &profiling_evt);
    profiling_evt.wait();
    
    pt_assert(clStatus, "Could not enqueue the kernel");
    clStatus = cmd_queue.enqueueReleaseGLObjects(&img_buffer, NULL, NULL);
    pt_assert(clStatus, "Could not release gl objects");
    cmd_queue.finish();
    
    cl_ulong time_start = profiling_evt.getProfilingInfo<CL_PROFILING_COMMAND_START>();
    cl_ulong time_end = profiling_evt.getProfilingInfo<CL_PROFILING_COMMAND_END>();
    cl_ulong total_time = time_end - time_start;
    std::cout << "Total time: " << total_time * 0.001 * 0.001 << " ms \n";
    
    /*
     * END - each frame part
     */
    
    gl::draw(imgTex, Rectf(0, 0, getWindowWidth(), getWindowHeight()));
}

void mainLoop( cl::CommandQueue& queue, cl::Context& context, cl::Kernel kernel, cl::Buffer clImgDesc, cl::Buffer clCamera ){
  cl::Event eAcquire, eRelease, eExecute;
  cl_int err;


  glFinish();
  checkGLErr( "glFinish()" );

  queue.enqueueWriteBuffer( clImgDesc, CL_TRUE, 0, 1 * sizeof(ImageDescriptor), (const void*)&imgDesc);

  err = queue.enqueueAcquireGLObjects( vSharedUnits, NULL, &eAcquire );
  checkErr(err, "CommandQueue::enqueueAcquireGLObjects()");

  eAcquire.wait();


  err = queue.enqueueNDRangeKernel( kernel, cl::NullRange, cl::NDRange(WIDTH, HEIGHT), cl::NullRange, NULL, &eExecute);

  checkErr(err, "CommandQueue::enqueueNDRangeKernel()");
  //std::cout<<"Kernel executing"<< std::endl ;
  clock_t ti = clock();
  eExecute.wait();
  clock_t tf = clock();

  queue.finish();
  err = queue.enqueueReleaseGLObjects( vSharedUnits, NULL, &eRelease );
  checkErr(err, "CommandQueue::enqueueReleaseGLObjects()");

  eRelease.wait();


  imgDesc.numSamples += SAMPLES;

  pAccumulator->glBind( GL_DRAW_FRAMEBUFFER );
  checkGLErr( "glBind GL_DRAW_FRAMEBUFFER, Accumulator " );
  pCLTarget->glBind( GL_READ_FRAMEBUFFER );
  checkGLErr( "glBind GL_READ_FRAMEBUFFER, Main Target " );
  glBlitFramebuffer( 0, 0, WIDTH, HEIGHT, 0, 0, WIDTH, HEIGHT, GL_COLOR_BUFFER_BIT, GL_NEAREST );
  checkGLErr( "glBlitFramebuffer" );

  glBindFramebuffer( GL_DRAW_FRAMEBUFFER, 0 );
  checkGLErr( "glBind GL_DRAW_FRAMEBUFFER, 0 " );
  pCLTarget->glBind( GL_READ_FRAMEBUFFER );
  checkGLErr( "glBind GL_READ_FRAMEBUFFER, something " );
  glBlitFramebuffer( 0, 0, WIDTH, HEIGHT, 0, 0, WIDTH, HEIGHT, GL_COLOR_BUFFER_BIT, GL_NEAREST );
  checkGLErr( "glBlitFramebuffer" );

  glfwPollEvents();

  pCamera->glfwHandleCursor( ((float)(tf - ti))/(CLOCKS_PER_SEC * 1.0f) );
  if( sceneChanged() ){
    //printf("scene changed..!");
    imgDesc.numSamples = 0;
    CLCamera* cam = pCamera->getCLCamera();
    queue.enqueueWriteBuffer( clCamera, CL_TRUE, 0, 1 * sizeof(CLCamera), (const void*)cam );
    delete cam;
  }

  glfwSwapBuffers( window );
  checkGLErr( "glSwapBuffers" );

  //Block for a while.
  //int i;
  //std::cin >> i;

  //float timeTaken = ( (float)(tf - ti) ) / (float)CLOCKS_PER_SEC;
  //std::cout<<"Time taken: "<< timeTaken * 1000 << "ms" << std::endl;
  //std::cout<<"Predicted FPS: "<< 1 / timeTaken << " FPS"<< std::endl;
  if( imgDesc.numSamples % 10 == 0 )
    std::cout<<"numSamples: "<<imgDesc.numSamples<<std::endl;
  //handleFrameCounter();

}