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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef INCLUDED_BASEBMP_RGBMASKPIXELFORMATS_HXX
#define INCLUDED_BASEBMP_RGBMASKPIXELFORMATS_HXX
#include <basebmp/color.hxx>
#include <basebmp/colortraits.hxx>
#include <basebmp/accessor.hxx>
#include <basebmp/pixeliterator.hxx>
#include <basebmp/pixelformatadapters.hxx>
#include <basebmp/metafunctions.hxx>
#include <basebmp/endian.hxx>
#include <vigra/numerictraits.hxx>
#include <vigra/metaprogramming.hxx>
#include <functional>
namespace basebmp
{
/** Base class operating on RGB truecolor mask pixel
Use this template, if you have an (integer) pixel type, and three
bitmasks denoting where the channel bits are.
@tpl PixelType
Input pixel type to operate on
@tpl ColorType
Underlying color type, to convert the pixel values into
@tpl RedMask
Bitmask, to access the red bits in the data type
@tpl GreenMask
Bitmask, to access the green bits in the data type
@tpl BlueMask
Bitmask, to access the blue bits in the data type
@tpl SwapBytes
When true, the final pixel values will be byte-swapped before
passed on.
*/
template< typename PixelType,
typename ColorType,
unsigned int RedMask,
unsigned int GreenMask,
unsigned int BlueMask,
bool SwapBytes > struct RGBMaskFunctorBase
{
typedef PixelType pixel_type;
typedef ColorType color_type;
typedef typename make_unsigned<pixel_type>::type unsigned_pixel_type;
typedef typename ColorTraits<ColorType>::component_type component_type;
// calc corrective shifts for all three channels in advance
enum {
red_shift = numberOfTrailingZeros<RedMask>::value,
green_shift = numberOfTrailingZeros<GreenMask>::value,
blue_shift = numberOfTrailingZeros<BlueMask>::value,
red_bits = bitcount<RedMask>::value,
green_bits = bitcount<GreenMask>::value,
blue_bits = bitcount<BlueMask>::value
};
};
template< typename PixelType,
typename ColorType,
unsigned int RedMask,
unsigned int GreenMask,
unsigned int BlueMask,
bool SwapBytes > struct RGBMaskGetter :
public RGBMaskFunctorBase<PixelType,
ColorType,
RedMask,
GreenMask,
BlueMask,
SwapBytes>,
public std::unary_function<PixelType, ColorType>
{
typedef RGBMaskFunctorBase<PixelType,
ColorType,
RedMask,
GreenMask,
BlueMask,
SwapBytes> base_type;
ColorType operator()( PixelType v ) const
{
v = SwapBytes ? byteSwap(v) : v;
const typename base_type::unsigned_pixel_type red (v & RedMask);
const typename base_type::unsigned_pixel_type green(v & GreenMask);
const typename base_type::unsigned_pixel_type blue (v & BlueMask);
// shift color nibbles to right-aligend position. ORing it
// channel value shifted twice the number of channel bits, to
// spread the value into the component_type range
ColorType res( (shiftRight(red,
base_type::red_shift-8*
(signed)sizeof(typename base_type::component_type)+
base_type::red_bits)) |
(shiftRight(red,
base_type::red_shift-8*
(signed)sizeof(typename base_type::component_type)+
2*base_type::red_bits)),
(shiftRight(green,
base_type::green_shift-8*
(signed)sizeof(typename base_type::component_type)+
base_type::green_bits)) |
(shiftRight(green,
base_type::green_shift-8*
(signed)sizeof(typename base_type::component_type)+
2*base_type::green_bits)),
(shiftRight(blue,
base_type::blue_shift-8*
(signed)sizeof(typename base_type::component_type)+
base_type::blue_bits)) |
(shiftRight(blue,
base_type::blue_shift-8*
(signed)sizeof(typename base_type::component_type)+
2*base_type::blue_bits)) );
return res;
}
};
template< typename PixelType,
typename ColorType,
unsigned int RedMask,
unsigned int GreenMask,
unsigned int BlueMask,
bool SwapBytes > struct RGBMaskSetter :
public RGBMaskFunctorBase<PixelType,
ColorType,
RedMask,
GreenMask,
BlueMask,
SwapBytes>,
public std::unary_function<ColorType, PixelType>
{
typedef RGBMaskFunctorBase<PixelType,
ColorType,
RedMask,
GreenMask,
BlueMask,
SwapBytes> base_type;
PixelType operator()( ColorType const& c ) const
{
const typename base_type::unsigned_pixel_type red (c.getRed());
const typename base_type::unsigned_pixel_type green(c.getGreen());
const typename base_type::unsigned_pixel_type blue (c.getBlue());
typename base_type::unsigned_pixel_type res(
(shiftLeft(red,
base_type::red_shift-8*
(signed)sizeof(typename base_type::component_type)+
base_type::red_bits) & RedMask) |
(shiftLeft(green,
base_type::green_shift-8*
(signed)sizeof(typename base_type::component_type)+
base_type::green_bits) & GreenMask) |
(shiftLeft(blue,
base_type::blue_shift-8*
(signed)sizeof(typename base_type::component_type)+
base_type::blue_bits) & BlueMask) );
return SwapBytes ? byteSwap(res) : res;
}
};
//-----------------------------------------------------------------------------
template< typename PixelType,
unsigned int RedMask,
unsigned int GreenMask,
unsigned int BlueMask,
bool SwapBytes > struct PixelFormatTraitsTemplate_RGBMask
{
typedef PixelType pixel_type;
typedef RGBMaskGetter<pixel_type,
Color,
RedMask,
GreenMask,
BlueMask,
SwapBytes> getter_type;
typedef RGBMaskSetter<pixel_type,
Color,
RedMask,
GreenMask,
BlueMask,
SwapBytes> setter_type;
typedef PixelIterator<pixel_type> iterator_type;
typedef StandardAccessor<pixel_type> raw_accessor_type;
typedef AccessorSelector<
getter_type, setter_type> accessor_selector;
};
//-----------------------------------------------------------------------------
#ifdef OSL_LITENDIAN
# define BASEBMP_TRUECOLORMASK_LSB_SWAP false
# define BASEBMP_TRUECOLORMASK_MSB_SWAP true
#else
# ifdef OSL_BIGENDIAN
# define BASEBMP_TRUECOLORMASK_LSB_SWAP true
# define BASEBMP_TRUECOLORMASK_MSB_SWAP false
# else
# error Undetermined endianness!
# endif
#endif
//-----------------------------------------------------------------------------
// 16bpp MSB RGB
typedef PixelFormatTraitsTemplate_RGBMask<
sal_uInt16,
0xF800,
0x07E0,
0x001F,
BASEBMP_TRUECOLORMASK_MSB_SWAP > PixelFormatTraits_RGB16_565_MSB;
BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_RGB16_565_MSB::getter_type,
PixelFormatTraits_RGB16_565_MSB::setter_type);
// 16bpp LSB RGB
typedef PixelFormatTraitsTemplate_RGBMask<
sal_uInt16,
0xF800,
0x07E0,
0x001F,
BASEBMP_TRUECOLORMASK_LSB_SWAP > PixelFormatTraits_RGB16_565_LSB;
BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_RGB16_565_LSB::getter_type,
PixelFormatTraits_RGB16_565_LSB::setter_type);
// 32bpp endian-sensitive RGB
typedef PixelFormatTraitsTemplate_RGBMask<
sal_uInt32,
0xFF0000,
0x00FF00,
0x0000FF,
BASEBMP_TRUECOLORMASK_LSB_SWAP > PixelFormatTraits_RGB32_888;
BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_RGB32_888::getter_type,
PixelFormatTraits_RGB32_888::setter_type);
// 32bpp endian-sensitive BGR
typedef PixelFormatTraitsTemplate_RGBMask<
sal_uInt32,
0xFF0000,
0x00FF00,
0x0000FF,
BASEBMP_TRUECOLORMASK_MSB_SWAP > PixelFormatTraits_BGR32_888;
BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_BGR32_888::getter_type,
PixelFormatTraits_BGR32_888::setter_type);
} // namespace basebmp
#endif /* INCLUDED_BASEBMP_RGBMASKPIXELFORMATS_HXX */
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