image.h

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// File:        image.h
// Description: Image wrapper.
//
// 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.
 
#ifndef TESSERACT_CCSTRUCT_IMAGE_H_
#define TESSERACT_CCSTRUCT_IMAGE_H_
 
#include <tesseract/export.h>
 
struct Pix;
 
namespace tesseract {
 
class TESS_API Image {
public:
  Pix *pix_ = nullptr;
 
public:
  Image() = default;
  Image(Pix *pix) : pix_(pix) {}
 
  // service
  bool operator==(decltype(nullptr)) const { return pix_ == nullptr; }
  bool operator!=(decltype(nullptr)) const { return pix_ != nullptr; }
  explicit operator bool() const { return pix_ != nullptr; }
  operator Pix *() const { return pix_; }
  explicit operator Pix **() { return &pix_; }
  Pix *operator->() const { return pix_; }
 
  // api
  Image clone() const; // increases refcount
  Image copy() const;  // does full copy
  void destroy();
  bool isZero() const;
 
  // ops
  Image operator|(Image) const;
  Image &operator|=(Image);
  Image operator&(Image) const;
  Image &operator&=(Image);
};
 
} // namespace tesseract
 
#endif // TESSERACT_CCSTRUCT_IMAGE_H_