| /************************************************************** |
| * |
| * 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_INTCONVERSION_HXX |
| #define INCLUDED_BASEBMP_INTCONVERSION_HXX |
| |
| #include <vigra/rgbvalue.hxx> |
| #include <functional> |
| |
| namespace basebmp |
| { |
| // metafunctions to retrieve correct POD from/to basebmp::Color |
| //------------------------------------------------------------------------ |
| |
| /// type-safe conversion from RgbValue to packed int32 |
| template< class RgbVal > struct UInt32FromRgbValue |
| { |
| sal_uInt32 operator()( RgbVal const& c ) const |
| { |
| return (c[0] << 16) | (c[1] << 8) | c[2]; |
| } |
| }; |
| |
| /// type-safe conversion from packed int32 to RgbValue |
| template< class RgbVal > struct RgbValueFromUInt32 |
| { |
| RgbVal operator()( sal_uInt32 c ) const |
| { |
| return RgbVal((c >> 16) & 0xFF, |
| (c >> 8) & 0xFF, |
| c & 0xFF); |
| } |
| }; |
| |
| /// Get converter from given data type to sal_uInt32 |
| template< typename DataType > struct uInt32Converter |
| { |
| typedef std::identity<DataType> to; |
| typedef std::identity<DataType> from; |
| }; |
| template< unsigned int RedIndex, |
| unsigned int GreenIndex, |
| unsigned int BlueIndex > struct uInt32Converter< |
| vigra::RGBValue< sal_uInt8, |
| RedIndex, |
| GreenIndex, |
| BlueIndex > > |
| { |
| typedef UInt32FromRgbValue< |
| vigra::RGBValue< sal_uInt8, |
| RedIndex, |
| GreenIndex, |
| BlueIndex > > |
| to; |
| typedef RgbValueFromUInt32< |
| vigra::RGBValue< sal_uInt8, |
| RedIndex, |
| GreenIndex, |
| BlueIndex > > |
| from; |
| }; |
| } |
| |
| #endif /* INCLUDED_BASEBMP_INTCONVERSION_HXX */ |
