File indexing completed on 2024-05-12 15:59:37

 /*
  *  SPDX-FileCopyrightText: 2021 Dmitry Kazakov <dimula73@gmail.com>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #ifndef KoOptimizedPixelDataScalerU8ToU16Base_H
 #define KoOptimizedPixelDataScalerU8ToU16Base_H
 
 #include <QtGlobal>
 #include "kritapigment_export.h"
 
 /**
  * @brief Converts an RGB-like color space between U8 and U16 formats
  *
  * In some places we need to extend precision of the color space
  * in a very efficient way. It is specifically needed in the
  * colorsmudge engine, because it operates at an extremely low
  * levels of opacity. The conversion should also happen very
  * efficiently, because colorsmudge requests it on the fly right
  * when the user is painting on the canvas.
  *
  * The actual implementation is placed in class
  * `KoOptimizedPixelDataScalerU8ToU16`.
  *
  * To create a scaler, just call a factory. It will create a version
  * of the scaler optimized for your CPU architecture.
  *
  * \code{.cpp}
  * QScopedPointer<KoOptimizedPixelDataScalerU8ToU16Base> scaler(
  *     KoOptimizedPixelDataScalerU8ToU16Factory::createRgbaScaler());
  *
  * // ...
  *
  * // convert the data from U8 to U16
  * scaler->convertU8ToU16(src, srcRowStride,
  *                        dst, dstRowStride,
  *                        numRows, numColumns);
  *
  * // ...
  *
  * // convert the data back from U16 to U8
  * scaler->convertU16ToU8(src, srcRowStride,
  *                        dst, dstRowStride,
  *                        numRows, numColumns);
  *
  * \endcode
  */
 class KRITAPIGMENT_EXPORT KoOptimizedPixelDataScalerU8ToU16Base
 {
 public:
     KoOptimizedPixelDataScalerU8ToU16Base(int channelsPerPixel);
 
     virtual ~KoOptimizedPixelDataScalerU8ToU16Base();
 
     virtual void convertU8ToU16(const quint8 *src, int srcRowStride,
                                 quint8 *dst, int dstRowStride,
                                 int numRows, int numColumns) const = 0;
 
     virtual void convertU16ToU8(const quint8 *src, int srcRowStride,
                                 quint8 *dst, int dstRowStride,
                                 int numRows, int numColumns) const = 0;
 
     int channelsPerPixel() const;
 
 protected:
     int m_channelsPerPixel;
 };
 
 #endif // KoOptimizedPixelDataScalerU8ToU16Base_H