BitmapPalettes.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / Imaging / BitmapPalettes.cs / 1305600 / BitmapPalettes.cs
                        
                        
                            //------------------------------------------------------------------------------ 
//  Microsoft Avalon
//  Copyright (c) Microsoft Corporation, All rights reserved.
//
//  File: BitmapPalettes.cs 
//
//----------------------------------------------------------------------------- 
 
using System;
using System.Collections; 
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Reflection;
using MS.Internal; 
using System.Diagnostics;
using System.Windows.Media; 
using System.Globalization; 
using System.Runtime.InteropServices;
 
namespace System.Windows.Media.Imaging
{
    #region BitmapPalettes
    ///  
    /// Pre-defined palette types
    ///  
    static public class BitmapPalettes 
    {
        ///  
        /// BlackAndWhite
        /// 
        static public Imaging.BitmapPalette BlackAndWhite
        { 
            get
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedBW, false); 
            }
        } 

        /// 
        /// BlackAndWhiteTransparent
        ///  
        static public Imaging.BitmapPalette BlackAndWhiteTransparent
        { 
            get 
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedBW, true); 
            }
        }

        ///  
        /// Halftone8
        ///  
        static public Imaging.BitmapPalette Halftone8 
        {
            get 
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone8, false);
            }
        } 

        ///  
        /// Halftone8Transparent 
        /// 
        static public Imaging.BitmapPalette Halftone8Transparent 
        {
            get
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone8, true); 
            }
        } 
 
        /// 
        /// Halftone27 
        /// 
        static public Imaging.BitmapPalette Halftone27
        {
            get 
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone27, false); 
            } 
        }
 
        /// 
        /// Halftone27Transparent
        /// 
        static public Imaging.BitmapPalette Halftone27Transparent 
        {
            get 
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone27, true);
            } 
        }


        ///  
        /// Halftone64
        ///  
        static public Imaging.BitmapPalette Halftone64 
        {
            get 
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone64, false);
            }
        } 

        ///  
        /// Halftone64Transparent 
        /// 
        static public Imaging.BitmapPalette Halftone64Transparent 
        {
            get
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone64, true); 
            }
        } 
 
        /// 
        /// Halftone125 
        /// 
        static public Imaging.BitmapPalette Halftone125
        {
            get 
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone125, false); 
            } 
        }
 
        /// 
        /// Halftone125Transparent
        /// 
        static public Imaging.BitmapPalette Halftone125Transparent 
        {
            get 
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone125, true);
            } 
        }

        /// 
        /// Halftone216 
        /// 
        static public Imaging.BitmapPalette Halftone216 
        { 
            get
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone216, false);
            }
        }
 
        /// 
        /// Halftone216Transparent 
        ///  
        static public Imaging.BitmapPalette Halftone216Transparent
        { 
            get
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone216, true);
            } 
        }
 
        ///  
        /// Halftone252
        ///  
        static public Imaging.BitmapPalette Halftone252
        {
            get
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone252, false);
            } 
        } 

        ///  
        /// Halftone252Transparent
        /// 
        static public Imaging.BitmapPalette Halftone252Transparent
        { 
            get
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone252, true); 
            }
        } 

        /// 
        /// Halftone256
        ///  
        static public Imaging.BitmapPalette Halftone256
        { 
            get 
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone256, false); 
            }
        }

        ///  
        /// Halftone256Transparent
        ///  
        static public Imaging.BitmapPalette Halftone256Transparent 
        {
            get 
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone256, true);
            }
        } 

        ///  
        /// Gray4 
        /// 
        static public Imaging.BitmapPalette Gray4 
        {
            get
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedGray4, false); 
            }
        } 
 
        /// 
        /// Gray4Transparent 
        /// 
        static public Imaging.BitmapPalette Gray4Transparent
        {
            get 
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedGray4, true); 
            } 
        }
 
        /// 
        /// Gray16
        /// 
        static public Imaging.BitmapPalette Gray16 
        {
            get 
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedGray16, false);
            } 
        }

        /// 
        /// Gray16Transparent 
        /// 
        static public Imaging.BitmapPalette Gray16Transparent 
        { 
            get
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedGray16, true);
            }
        }
 
        /// 
        /// Gray256 
        ///  
        static public Imaging.BitmapPalette Gray256
        { 
            get
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedGray256, false);
            } 
        }
 
        ///  
        /// Gray256Transparent
        ///  
        static public Imaging.BitmapPalette Gray256Transparent
        {
            get
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedGray256, true);
            } 
        } 

        ///  
        /// WebPalette
        /// 
        static public Imaging.BitmapPalette WebPalette
        { 
            get
            { 
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone216, false); 
            }
        } 

        /// 
        /// WebpaletteTransparent
        ///  
        static public Imaging.BitmapPalette WebPaletteTransparent
        { 
            get 
            {
                return BitmapPalettes.FromMILPaletteType(WICPaletteType.WICPaletteTypeFixedHalftone216, true); 
            }
        }

        static internal Imaging.BitmapPalette FromMILPaletteType(WICPaletteType type, bool hasAlpha) 
        {
            int key = (int)type; 
 
            Debug.Assert(key < c_maxPalettes);
 
            Imaging.BitmapPalette palette;
            Imaging.BitmapPalette[] palettes;

            if (hasAlpha) 
            {
                palettes = transparentPalettes; 
            } 
            else
            { 
                palettes = opaquePalettes;
            }

            palette = palettes[key]; 

            if (palette == null) 
            { 
                lock (palettes)
                { 
                    // palettes might have changed while waiting for the lock.
                    // Need to check again.

                    palette = palettes[key]; 
                    if (palette == null)
                    { 
                        palette = new Imaging.BitmapPalette(type, hasAlpha); 
                        palettes[key] = palette;
                    } 
                }
            }

            return palette; 
        }
 
        static private Imaging.BitmapPalette[] transparentPalettes 
        {
            get 
            {
                if (s_transparentPalettes == null)
                {
                    s_transparentPalettes = new Imaging.BitmapPalette[c_maxPalettes]; 
                }
 
                return s_transparentPalettes; 
            }
        } 

        static private Imaging.BitmapPalette[] opaquePalettes
        {
            get 
            {
                if (s_opaquePalettes == null) 
                { 
                    s_opaquePalettes = new Imaging.BitmapPalette[c_maxPalettes];
                } 

                return s_opaquePalettes;
            }
        } 

        static private Imaging.BitmapPalette[] s_transparentPalettes; 
        static private Imaging.BitmapPalette[] s_opaquePalettes; 

        private const int c_maxPalettes = 64; 
    }
    #endregion // Imaging.BitmapPalettes
}
 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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