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1 : : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : : /*
3 : : * This file is part of the LibreOffice project.
4 : : *
5 : : * This Source Code Form is subject to the terms of the Mozilla Public
6 : : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : : *
9 : : * This file incorporates work covered by the following license notice:
10 : : *
11 : : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : : * contributor license agreements. See the NOTICE file distributed
13 : : * with this work for additional information regarding copyright
14 : : * ownership. The ASF licenses this file to you under the Apache
15 : : * License, Version 2.0 (the "License"); you may not use this file
16 : : * except in compliance with the License. You may obtain a copy of
17 : : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : : */
19 : :
20 : : #ifndef INCLUDED_BASEBMP_PIXELFORMATADAPTERS_HXX
21 : : #define INCLUDED_BASEBMP_PIXELFORMATADAPTERS_HXX
22 : :
23 : : #include <basebmp/accessortraits.hxx>
24 : : #include <basebmp/accessoradapters.hxx>
25 : :
26 : : #include <vigra/metaprogramming.hxx>
27 : :
28 : : namespace basebmp
29 : : {
30 : :
31 : : // convenience functionality, providing everything necessary for a new
32 : : // pixel format. simply plug in two conversion functors from/to a
33 : : // common color format.
34 : :
35 : : /** Accessor selection metafunction, used to wrap a given accessor
36 : : with one converting between the pixel and color types
37 : :
38 : : Use the nested template's typedef type, to retrieve an
39 : : AccessorAdapter which operates on a pixel value accessor, and
40 : : provides color values to the outside.
41 : :
42 : : Nested like this, to avoid template template parameters at other
43 : : places: an instantiated version of AccessorSelector can be passed
44 : : to other templates, which in turn can invoke the nested meta
45 : : function.
46 : : */
47 : : template< typename Getter,
48 : : typename Setter > struct AccessorSelector
49 : : {
50 : : template< typename Accessor > struct wrap_accessor
51 : : {
52 : : typedef UnaryFunctionAccessorAdapter< Accessor,
53 : : Getter,
54 : : Setter > type;
55 : : };
56 : : };
57 : :
58 : : //-----------------------------------------------------------------------------
59 : :
60 : : /** Convert color value to pixel data type
61 : : */
62 : : template< class Accessor, typename DataType > struct ColorConvert
63 : : {
64 : 5027814 : DataType operator()( const Accessor& acc,
65 : : typename Accessor::value_type v ) const
66 : : {
67 : 5027814 : return acc.setter(v);
68 : : }
69 : : };
70 : :
71 : : //-----------------------------------------------------------------------------
72 : :
73 : : /** Macro generates partial specialization for color-conversion
74 : : UnaryFunctionAccessorAdapter, and the given getter/setter functors
75 : : */
76 : : #define BASEBMP_SPECIALIZE_ACCESSORTRAITS(Getter,Setter) \
77 : : template< class Accessor > struct AccessorTraits< \
78 : : UnaryFunctionAccessorAdapter< Accessor, \
79 : : Getter, \
80 : : Setter > > \
81 : : { \
82 : : typedef typename Accessor::value_type data_type; \
83 : : typedef UnaryFunctionAccessorAdapter< \
84 : : Accessor, \
85 : : Getter, \
86 : : Setter > accessor_type; \
87 : : typedef typename accessor_type::value_type value_type; \
88 : : typedef ColorConvert< accessor_type, \
89 : : data_type > color_lookup; \
90 : : typedef Accessor raw_accessor; \
91 : : typedef vigra::VigraFalseType xor_accessor; \
92 : : template< class MaskAccessor, \
93 : : class Iterator, \
94 : : class MaskIterator > struct masked_accessor\
95 : : { typedef vigra::VigraFalseType type; }; \
96 : : }
97 : :
98 : : } // namespace basebmp
99 : :
100 : : #endif /* INCLUDED_BASEBMP_PIXELFORMATADAPTERS_HXX */
101 : :
102 : : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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