text: /*
   * gl_compute_program.h - GL compute program class
   *
   *  Copyright (c) 2018 Intel Corporation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   * Author: Yinhang Liu <yinhangx.liu@intel.com>
   */
  
  #ifndef XCAM_GL_COMPUTE_PROGRAM_H
  #define XCAM_GL_COMPUTE_PROGRAM_H
  
  #include <gles/gl_program.h>
  
  namespace XCam {
  
  struct GLGroupsSize {
      GLint x, y, z;
      GLGroupsSize () : x (0), y (0), z (0) {}
  };
  
  class GLComputeProgram
      : public GLProgram
  {
  public:
      static SmartPtr<GLComputeProgram> create_compute_program (const char *name = NULL);
      ~GLComputeProgram ();
  
      bool set_groups_size (const GLGroupsSize &size);
      void set_barrier (bool barrier, GLbitfield barrier_bit = GL_SHADER_STORAGE_BARRIER_BIT) {
          _barrier = barrier;
          _barrier_bit = barrier_bit;
      }
  
      virtual XCamReturn work ();
      virtual XCamReturn finish ();
  
  private:
      explicit GLComputeProgram (GLuint id, const char *name);
  
      XCamReturn dispatch ();
      XCamReturn barrier (GLbitfield barrier_bit);
  
      bool get_max_groups_size (GLGroupsSize &size);
      bool check_groups_size (const GLGroupsSize &size);
  
  private:
      XCAM_DEAD_COPY (GLComputeProgram);
  
  private:
      bool                       _barrier;
      GLbitfield                 _barrier_bit;
      GLGroupsSize               _groups_size;
      static GLGroupsSize        _max_groups_size;
  };
  
  }
  
  #endif // XCAM_GL_COMPUTE_PROGRAM_H
  