1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #ifndef INCLUDED_BASEBMP_GREYLEVELFORMATS_HXX 25 #define INCLUDED_BASEBMP_GREYLEVELFORMATS_HXX 26 27 #include <basebmp/color.hxx> 28 #include <basebmp/colortraits.hxx> 29 #include <basebmp/accessor.hxx> 30 #include <basebmp/pixeliterator.hxx> 31 #include <basebmp/packedpixeliterator.hxx> 32 #include <basebmp/pixelformatadapters.hxx> 33 #include <basebmp/metafunctions.hxx> 34 35 #include <vigra/numerictraits.hxx> 36 #include <vigra/metaprogramming.hxx> 37 38 #include <functional> 39 40 namespace basebmp 41 { 42 43 template< typename PixelType, 44 typename ColorType, 45 int UsedRange > struct GreylevelGetter : 46 public std::unary_function<PixelType, ColorType> 47 { operator ()basebmp::GreylevelGetter48 ColorType operator()( PixelType const& c ) const 49 { 50 return ColorTraits<ColorType>::fromGreyscale( 51 vigra::NumericTraits<PixelType>::toPromote(c) * 52 vigra::NumericTraits<PixelType>::maxConst / UsedRange ); 53 } 54 }; 55 56 template< typename PixelType, 57 typename ColorType, 58 int UsedRange > struct GreylevelSetter : 59 public std::unary_function<ColorType, PixelType> 60 { operator ()basebmp::GreylevelSetter61 PixelType operator()( ColorType const& c ) const 62 { 63 return vigra::NumericTraits<PixelType>::toPromote( 64 ColorTraits<ColorType>::toGreyscale(c)) * 65 UsedRange / 66 vigra::NumericTraits<PixelType>::maxConst; 67 } 68 }; 69 70 //----------------------------------------------------------------------------- 71 72 template< class Iterator, 73 class Accessor, 74 int UsedRange > struct PixelFormatTraitsTemplate_Greylevel 75 { 76 typedef typename Iterator::value_type pixel_type; 77 78 typedef GreylevelGetter<pixel_type, 79 Color, 80 UsedRange> getter_type; 81 typedef GreylevelSetter<pixel_type, 82 Color, 83 UsedRange> setter_type; 84 85 typedef Iterator iterator_type; 86 typedef Accessor raw_accessor_type; 87 typedef AccessorSelector< 88 getter_type, 89 setter_type > accessor_selector; 90 }; 91 92 template< int BitsPerPixel, 93 bool MsbFirst > struct PixelFormatTraitsTemplate_PackedGreylevel : 94 public PixelFormatTraitsTemplate_Greylevel< 95 PackedPixelIterator< sal_uInt8, 96 BitsPerPixel, 97 true >, 98 NonStandardAccessor< sal_uInt8 >, 99 (1UL << BitsPerPixel)-1 > 100 {}; 101 102 //----------------------------------------------------------------------------- 103 104 // 1bpp MSB 105 typedef PixelFormatTraitsTemplate_PackedGreylevel<1, true> PixelFormatTraits_GREY1_MSB; 106 107 // 1bpp LSB 108 typedef PixelFormatTraitsTemplate_PackedGreylevel<1, false> PixelFormatTraits_GREY1_LSB; 109 BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_GREY1_MSB::getter_type, 110 PixelFormatTraits_GREY1_MSB::setter_type); 111 112 113 // 4bpp MSB 114 typedef PixelFormatTraitsTemplate_PackedGreylevel<4, true> PixelFormatTraits_GREY4_MSB; 115 116 // 4bpp LSB 117 typedef PixelFormatTraitsTemplate_PackedGreylevel<4, false> PixelFormatTraits_GREY4_LSB; 118 BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_GREY4_MSB::getter_type, 119 PixelFormatTraits_GREY4_MSB::setter_type); 120 121 // 8bpp 122 typedef PixelFormatTraitsTemplate_Greylevel< 123 PixelIterator< sal_uInt8 >, 124 StandardAccessor< sal_uInt8 >, 125 255 > PixelFormatTraits_GREY8; 126 BASEBMP_SPECIALIZE_ACCESSORTRAITS(PixelFormatTraits_GREY8::getter_type, 127 PixelFormatTraits_GREY8::setter_type); 128 129 } // namespace basebmp 130 131 #endif /* INCLUDED_BASEBMP_GREYLEVELFORMATS_HXX */ 132