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GrayScaleMode support for WPF .NET Frameworks projects #206

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23 changes: 23 additions & 0 deletions GMap.NET/GMap.NET.WindowsPresentation/ColorMatrixs.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
#if NETFRAMEWORK && !NET5_0_OR_GREATER
using System.Drawing.Imaging;
#endif

namespace GMap.NET.WindowsPresentation
{
#if NETFRAMEWORK && !NET5_0_OR_GREATER
public static class ColorMatrixs
{
public static readonly ColorMatrix GrayScale = new ColorMatrix(new[]
{
new[] {.3f, .3f, .3f, 0, 0}, new[] {.59f, .59f, .59f, 0, 0},
new[] {.11f, .11f, .11f, 0, 0}, new float[] {0, 0, 0, 1, 0}, new float[] {0, 0, 0, 0, 1}
});

public static readonly ColorMatrix Negative = new ColorMatrix(new[]
{
new float[] {-1, 0, 0, 0, 0}, new float[] {0, -1, 0, 0, 0}, new float[] {0, 0, -1, 0, 0},
new float[] {0, 0, 0, 1, 0}, new float[] {1, 1, 1, 0, 1}
});
}
#endif
}
61 changes: 61 additions & 0 deletions GMap.NET/GMap.NET.WindowsPresentation/GMapControl.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,9 @@
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Diagnostics;
#if NETFRAMEWORK && !NET5_0_OR_GREATER
using System.Drawing.Imaging;
#endif
using System.Globalization;
using System.Linq;
using System.Threading.Tasks;
Expand Down Expand Up @@ -407,6 +410,64 @@ public bool TouchEnabled

#endregion

#if NETFRAMEWORK && !NET5_0_OR_GREATER
private bool _grayScale;

[Category("GMap.NET")]
public bool GrayScaleMode
{
get
{
return _grayScale;
}
set
{
_grayScale = value;
ColorMatrix = value ? ColorMatrixs.GrayScale : null;
}
}

private bool _negative;

[Category("GMap.NET")]
public bool NegativeMode
{
get
{
return _negative;
}
set
{
_negative = value;
ColorMatrix = value ? ColorMatrixs.Negative : null;
}
}

ColorMatrix _colorMatrix;

[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
[Browsable(false)]
public ColorMatrix ColorMatrix
{
get
{
return _colorMatrix;
}
set
{
_colorMatrix = value;
if (GMapProvider.TileImageProxy != null && GMapProvider.TileImageProxy is GMapImageProxy)
{
(GMapProvider.TileImageProxy as GMapImageProxy).ColorMatrix = value;
if (_core != null && _core.IsStarted)
{
ReloadMap();
}
}
}
}
#endif

readonly Core _core = new Core();

PointLatLng _selectionStart;
Expand Down
70 changes: 67 additions & 3 deletions GMap.NET/GMap.NET.WindowsPresentation/GMapImage.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,9 @@
using System.Diagnostics;
#if NETFRAMEWORK && !NET5_0_OR_GREATER
using System.Drawing;
using System.Drawing.Imaging;
using GMap.NET.Internals;
#endif
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
Expand Down Expand Up @@ -44,22 +49,51 @@ public static void Enable()

public static readonly GMapImageProxy Instance = new GMapImageProxy();

#if NETFRAMEWORK && !NET5_0_OR_GREATER
internal ColorMatrix ColorMatrix;

static readonly bool Win7OrLater = Stuff.IsRunningOnWin7OrLater();
#endif

public override PureImage FromStream(Stream stream)
{
if (stream != null)
{
try
{
GMapImage ret = null;
#if NETFRAMEWORK && !NET5_0_OR_GREATER
if (ColorMatrix == null)
{
#endif
var m = BitmapFrame.Create(stream,
BitmapCreateOptions.IgnoreColorProfile,
BitmapCacheOption.OnLoad);

var ret = new GMapImage {Img = m};
ret = new GMapImage { Img = m };
#if NETFRAMEWORK && !NET5_0_OR_GREATER
}
else
{
var m = Image.FromStream(stream, true, !Win7OrLater);
var bitmap = ApplyColorMatrix(m, ColorMatrix);
using (var memory = new MemoryStream())
{
bitmap.Save(memory, ImageFormat.Png);
memory.Position = 0;

var bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.StreamSource = memory;
bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
bitmapImage.EndInit();
ret = new GMapImage { Img = bitmapImage };
}
}
#endif
if (ret.Img.CanFreeze)
{
ret.Img.Freeze();
}

return ret;
}
catch
Expand Down Expand Up @@ -95,6 +129,36 @@ public override bool Save(Stream stream, PureImage image)

return false;
}

#if NETFRAMEWORK && !NET5_0_OR_GREATER
Bitmap ApplyColorMatrix(Image original, ColorMatrix matrix)
{
// create a blank bitmap the same size as original
var newBitmap = new Bitmap(original.Width, original.Height);

using (original) // destroy original
{
// get a graphics object from the new image
using (var g = Graphics.FromImage(newBitmap))
{
// set the color matrix attribute
using (var attributes = new ImageAttributes())
{
attributes.SetColorMatrix(matrix);
g.DrawImage(original,
new Rectangle(0, 0, original.Width, original.Height),
0,
0,
original.Width,
original.Height,
GraphicsUnit.Pixel,
attributes);
}
}
}
return newBitmap;
}
#endif
}

//internal class TileVisual : FrameworkElement
Expand Down