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Diffstat (limited to 'basebmp/inc/basebmp/rgbmaskpixelformats.hxx')
| -rw-r--r-- | basebmp/inc/basebmp/rgbmaskpixelformats.hxx | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/basebmp/inc/basebmp/rgbmaskpixelformats.hxx b/basebmp/inc/basebmp/rgbmaskpixelformats.hxx new file mode 100644 index 000000000000..e0a12e211ddf --- /dev/null +++ b/basebmp/inc/basebmp/rgbmaskpixelformats.hxx @@ -0,0 +1,285 @@ +/************************************************************************* + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: rgbmaskpixelformats.hxx,v $ + * + * $Revision: 1.1 $ + * + * last change: $Author: thb $ $Date: 2006-07-11 11:38:55 $ + * + * The Contents of this file are made available subject to + * the terms of GNU Lesser General Public License Version 2.1. + * + * + * GNU Lesser General Public License Version 2.1 + * ============================================= + * Copyright 2005 by Sun Microsystems, Inc. + * 901 San Antonio Road, Palo Alto, CA 94303, USA + * + * 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. + * + * This library 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 for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + ************************************************************************/ + +#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, + int RedMask, + int GreenMask, + 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, + int RedMask, + int GreenMask, + 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); + + ColorType res( (shiftRight(red, + base_type::red_shift-8* + sizeof(typename base_type::component_type)+ + base_type::red_bits)) | + (shiftRight(red, + base_type::red_shift-8* + sizeof(typename base_type::component_type)+ + 2*base_type::red_bits)), + + (shiftRight(green, + base_type::green_shift-8* + sizeof(typename base_type::component_type)+ + base_type::green_bits)) | + (shiftRight(green, + base_type::green_shift-8* + sizeof(typename base_type::component_type)+ + 2*base_type::green_bits)), + + (shiftRight(blue, + base_type::blue_shift-8* + sizeof(typename base_type::component_type)+ + base_type::blue_bits)) | + (shiftRight(blue, + base_type::blue_shift-8* + sizeof(typename base_type::component_type)+ + 2*base_type::blue_bits)) ); + return res; + } +}; + +template< typename PixelType, + typename ColorType, + int RedMask, + int GreenMask, + 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* + sizeof(typename base_type::component_type)+ + base_type::red_bits) & RedMask) | + (shiftLeft(green, + base_type::green_shift-8* + sizeof(typename base_type::component_type)+ + base_type::green_bits) & GreenMask) | + (shiftLeft(blue, + base_type::blue_shift-8* + sizeof(typename base_type::component_type)+ + base_type::blue_bits) & BlueMask) ); + + return SwapBytes ? byteSwap(res) : res; + } +}; + +//----------------------------------------------------------------------------- + +template< typename PixelType, + int RedMask, + int GreenMask, + 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, + false > PixelFormatTraits_RGB32_888; +BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_RGB32_888::getter_type, + PixelFormatTraits_RGB32_888::setter_type); + + +} // namespace basebmp + +#endif /* INCLUDED_BASEBMP_RGBMASKPIXELFORMATS_HXX */ |