[occt.git] / src / Quantity / Quantity_ColorRGBAHasher.hxx

// Copyright (c) 2017 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#ifndef _Quantity_ColorRGBAHasher_HeaderFile
#define _Quantity_ColorRGBAHasher_HeaderFile

#include <Quantity_ColorRGBA.hxx>
#include <Quantity_ColorHasher.hxx>

//! Hasher of Quantity_ColorRGBA.
struct Quantity_ColorRGBAHasher
{

  //! Returns hash code for the given color.
  static Standard_Integer HashCode (const Quantity_ColorRGBA& theColor,
                                    const Standard_Integer    theUpper)
  {
    const NCollection_Vec4<float>& aColor = theColor;
    uint32_t aColor32 = (uint32_t(aColor.a() * 255.0f) << 24)
                      + (uint32_t(aColor.b() * 255.0f) << 16)
                      + (uint32_t(aColor.g() * 255.0f) << 8)
                      +  uint32_t(aColor.r() * 255.0f);
    return ((aColor32 & 0x7fffffff) % theUpper) + 1;
  }

  //! Returns true if two colors are equal.
  static Standard_Boolean IsEqual (const Quantity_ColorRGBA& theColor1,
                                   const Quantity_ColorRGBA& theColor2)
  {
    return theColor1 == theColor2;
  }

};

#endif // _Quantity_ColorRGBAHasher_HeaderFile
Commit	Line	Data
a71a71de	1	// Copyright (c) 2017 OPEN CASCADE SAS
	2	//
	3	// This file is part of Open CASCADE Technology software library.
	4	//
	5	// This library is free software; you can redistribute it and/or modify it under
	6	// the terms of the GNU Lesser General Public License version 2.1 as published
	7	// by the Free Software Foundation, with special exception defined in the file
	8	// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
	9	// distribution for complete text of the license and disclaimer of any warranty.
	10	//
	11	// Alternatively, this file may be used under the terms of Open CASCADE
	12	// commercial license or contractual agreement.
	13
	14	#ifndef _Quantity_ColorRGBAHasher_HeaderFile
	15	#define _Quantity_ColorRGBAHasher_HeaderFile
	16
	17	#include <Quantity_ColorRGBA.hxx>
	18	#include <Quantity_ColorHasher.hxx>
	19
	20	//! Hasher of Quantity_ColorRGBA.
	21	struct Quantity_ColorRGBAHasher
	22	{
	23
	24	//! Returns hash code for the given color.
	25	static Standard_Integer HashCode (const Quantity_ColorRGBA& theColor,
	26	const Standard_Integer theUpper)
	27	{
	28	const NCollection_Vec4<float>& aColor = theColor;
	29	uint32_t aColor32 = (uint32_t(aColor.a() * 255.0f) << 24)
	30	+ (uint32_t(aColor.b() * 255.0f) << 16)
	31	+ (uint32_t(aColor.g() * 255.0f) << 8)
	32	+ uint32_t(aColor.r() * 255.0f);
	33	return ((aColor32 & 0x7fffffff) % theUpper) + 1;
	34	}
	35
	36	//! Returns true if two colors are equal.
	37	static Standard_Boolean IsEqual (const Quantity_ColorRGBA& theColor1,
	38	const Quantity_ColorRGBA& theColor2)
	39	{
	40	return theColor1 == theColor2;
	41	}
	42
	43	};
	44
	45	#endif // _Quantity_ColorRGBAHasher_HeaderFile