xref: /aoo41x/main/basegfx/inc/basegfx/raster/bpixelraster.hxx (revision ce9c7ef7)

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 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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,
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#ifndef _BGFX_RASTER_BPIXELRASTER_HXX
#define _BGFX_RASTER_BPIXELRASTER_HXX

#include <algorithm>
#include <sal/types.h>
#include <basegfx/pixel/bpixel.hxx>
#include <rtl/memory.h>

//////////////////////////////////////////////////////////////////////////////
// predeclarations

//////////////////////////////////////////////////////////////////////////////

namespace basegfx
{
	class BPixelRaster
	{
	private:
		// do not allow copy constructor and assignment operator
		BPixelRaster(const BPixelRaster&);
		BPixelRaster& operator=(const BPixelRaster&);

	protected:
		sal_uInt32					mnWidth;
		sal_uInt32					mnHeight;
		sal_uInt32					mnCount;
		BPixel*						mpContent;

	public:
		// reset
		void reset()
		{
            rtl_zeroMemory(mpContent, sizeof(BPixel) * mnCount);
		}

		// constructor/destructor
		BPixelRaster(sal_uInt32 nWidth, sal_uInt32 nHeight)
		:	mnWidth(nWidth),
			mnHeight(nHeight),
			mnCount(nWidth * nHeight),
			mpContent(new BPixel[mnCount])
		{
			reset();
		}

		~BPixelRaster()
		{
			delete [] mpContent;
		}

		// coordinate calcs between X/Y and span
		sal_uInt32 getIndexFromXY(sal_uInt32 nX, sal_uInt32 nY) const { return (nX + (nY * mnWidth)); }
		sal_uInt32 getXFromIndex(sal_uInt32 nIndex) const { return (nIndex % mnWidth); }
		sal_uInt32 getYFromIndex(sal_uInt32 nIndex) const { return (nIndex / mnWidth); }

		// data access read
		sal_uInt32 getWidth() const { return mnWidth; }
		sal_uInt32 getHeight() const { return mnHeight; }
		sal_uInt32 getCount() const { return mnCount; }

		// data access read only
		const BPixel& getBPixel(sal_uInt32 nIndex) const
		{
#ifdef DBG_UTIL
			if(nIndex >= mnCount)
			{
				OSL_ENSURE(false, "getBPixel: Access out of range (!)");
				return BPixel::getEmptyBPixel();
			}
#endif
			return mpContent[nIndex];
		}

		// data access read/write
		BPixel& getBPixel(sal_uInt32 nIndex)
		{
#ifdef DBG_UTIL
			if(nIndex >= mnCount)
			{
				OSL_ENSURE(false, "getBPixel: Access out of range (!)");
				return mpContent[0L];
			}
#endif
			return mpContent[nIndex];
		}
	};
} // end of namespace basegfx

#endif /* _BGFX_RASTER_BPIXELRASTER_HXX */