| /************************************************************** |
| * |
| * 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, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| #ifndef INCLUDED_BASEBMP_GREYLEVELFORMATS_HXX |
| #define INCLUDED_BASEBMP_GREYLEVELFORMATS_HXX |
| |
| #include <basebmp/color.hxx> |
| #include <basebmp/colortraits.hxx> |
| #include <basebmp/accessor.hxx> |
| #include <basebmp/pixeliterator.hxx> |
| #include <basebmp/packedpixeliterator.hxx> |
| #include <basebmp/pixelformatadapters.hxx> |
| #include <basebmp/metafunctions.hxx> |
| |
| #include <vigra/numerictraits.hxx> |
| #include <vigra/metaprogramming.hxx> |
| |
| #include <functional> |
| |
| namespace basebmp |
| { |
| |
| template< typename PixelType, |
| typename ColorType, |
| int UsedRange > struct GreylevelGetter : |
| public std::unary_function<PixelType, ColorType> |
| { |
| ColorType operator()( PixelType const& c ) const |
| { |
| return ColorTraits<ColorType>::fromGreyscale( |
| vigra::NumericTraits<PixelType>::toPromote(c) * |
| vigra::NumericTraits<PixelType>::maxConst / UsedRange ); |
| } |
| }; |
| |
| template< typename PixelType, |
| typename ColorType, |
| int UsedRange > struct GreylevelSetter : |
| public std::unary_function<ColorType, PixelType> |
| { |
| PixelType operator()( ColorType const& c ) const |
| { |
| return vigra::NumericTraits<PixelType>::toPromote( |
| ColorTraits<ColorType>::toGreyscale(c)) * |
| UsedRange / |
| vigra::NumericTraits<PixelType>::maxConst; |
| } |
| }; |
| |
| //----------------------------------------------------------------------------- |
| |
| template< class Iterator, |
| class Accessor, |
| int UsedRange > struct PixelFormatTraitsTemplate_Greylevel |
| { |
| typedef typename Iterator::value_type pixel_type; |
| |
| typedef GreylevelGetter<pixel_type, |
| Color, |
| UsedRange> getter_type; |
| typedef GreylevelSetter<pixel_type, |
| Color, |
| UsedRange> setter_type; |
| |
| typedef Iterator iterator_type; |
| typedef Accessor raw_accessor_type; |
| typedef AccessorSelector< |
| getter_type, |
| setter_type > accessor_selector; |
| }; |
| |
| template< int BitsPerPixel, |
| bool MsbFirst > struct PixelFormatTraitsTemplate_PackedGreylevel : |
| public PixelFormatTraitsTemplate_Greylevel< |
| PackedPixelIterator< sal_uInt8, |
| BitsPerPixel, |
| true >, |
| NonStandardAccessor< sal_uInt8 >, |
| (1UL << BitsPerPixel)-1 > |
| {}; |
| |
| //----------------------------------------------------------------------------- |
| |
| // 1bpp MSB |
| typedef PixelFormatTraitsTemplate_PackedGreylevel<1, true> PixelFormatTraits_GREY1_MSB; |
| |
| // 1bpp LSB |
| typedef PixelFormatTraitsTemplate_PackedGreylevel<1, false> PixelFormatTraits_GREY1_LSB; |
| BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_GREY1_MSB::getter_type, |
| PixelFormatTraits_GREY1_MSB::setter_type); |
| |
| |
| // 4bpp MSB |
| typedef PixelFormatTraitsTemplate_PackedGreylevel<4, true> PixelFormatTraits_GREY4_MSB; |
| |
| // 4bpp LSB |
| typedef PixelFormatTraitsTemplate_PackedGreylevel<4, false> PixelFormatTraits_GREY4_LSB; |
| BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_GREY4_MSB::getter_type, |
| PixelFormatTraits_GREY4_MSB::setter_type); |
| |
| // 8bpp |
| typedef PixelFormatTraitsTemplate_Greylevel< |
| PixelIterator< sal_uInt8 >, |
| StandardAccessor< sal_uInt8 >, |
| 255 > PixelFormatTraits_GREY8; |
| BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_GREY8::getter_type, |
| PixelFormatTraits_GREY8::setter_type); |
| |
| } // namespace basebmp |
| |
| #endif /* INCLUDED_BASEBMP_GREYLEVELFORMATS_HXX */ |
