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Update GeoTaggedImage.WPF.cs

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Clemens 2022-01-08 23:09:01 +01:00
parent b29f6b63d0
commit e31fde26b4
1 changed files with 34 additions and 15 deletions
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49
MapImages/WPF/GeoTaggedImage.WPF.cs
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@ -3,6 +3,7 @@
// Licensed under the Microsoft Public License (Ms-PL) // Licensed under the Microsoft Public License (Ms-PL)
using System; using System;
using System.Collections.Generic;
using System.IO; using System.IO;
using System.Linq; using System.Linq;
using System.Threading.Tasks; using System.Threading.Tasks;
@ -32,17 +33,15 @@ namespace MapControl.Images
var mdata = bitmap.Metadata as BitmapMetadata; var mdata = bitmap.Metadata as BitmapMetadata;
if (mdata.GetQuery(PixelScaleQuery) is double[] pixelScale && if (mdata.GetQuery(PixelScaleQuery) is double[] ps &&
mdata.GetQuery(TiePointQuery) is double[] tiePoint && mdata.GetQuery(TiePointQuery) is double[] tp &&
pixelScale.Length == 3 && tiePoint.Length >= 6) ps.Length == 3 && tp.Length >= 6)
{ {
transform = new Matrix(pixelScale[0], 0d, 0d, -pixelScale[1], tiePoint[3], tiePoint[4]); transform = new Matrix(ps[0], 0d, 0d, -ps[1], tp[3], tp[4]);
} }
else if (mdata.GetQuery(TransformationQuery) is double[] transformation && else if (mdata.GetQuery(TransformationQuery) is double[] tf && tf.Length == 16)
transformation.Length == 16)
{ {
transform = new Matrix(transformation[0], transformation[1], transformation[4], transform = new Matrix(tf[0], tf[1], tf[4], tf[5], tf[3], tf[7]);
transformation[5], transformation[3], transformation[7]);
} }
else else
{ {
@ -60,21 +59,41 @@ namespace MapControl.Images
public static BitmapSource ConvertTransparentPixel(BitmapSource source, int transparentPixel) public static BitmapSource ConvertTransparentPixel(BitmapSource source, int transparentPixel)
{ {
List<Color> colors = null;
var format = source.Format;
var bpp = format.BitsPerPixel;
if (format == PixelFormats.Indexed8 ||
format == PixelFormats.Indexed4 ||
format == PixelFormats.Indexed2)
{
colors = source.Palette.Colors.ToList();
}
else if (format == PixelFormats.Gray8 ||
format == PixelFormats.Gray4 ||
format == PixelFormats.Gray2)
{
format = bpp == 8 ? PixelFormats.Indexed8
: bpp == 4 ? PixelFormats.Indexed4 : PixelFormats.Indexed2;
colors = Enumerable.Range(0, (1 << bpp))
.Select(i => Color.FromRgb((byte)i, (byte)i, (byte)i)).ToList();
}
var target = source; var target = source;
if (source.Format == PixelFormats.Gray8 && transparentPixel < 256) if (colors != null && transparentPixel < colors.Count)
{ {
var colors = Enumerable.Range(0, 256) colors[transparentPixel] = Colors.Transparent;
.Select(i => Color.FromArgb(i == transparentPixel ? (byte)0 : (byte)255, (byte)i, (byte)i, (byte)i))
.ToList();
var buffer = new byte[source.PixelWidth * source.PixelHeight]; var stride = (source.PixelWidth * bpp + 7) / 8;
var buffer = new byte[stride * source.PixelHeight];
source.CopyPixels(buffer, source.PixelWidth, 0); source.CopyPixels(buffer, stride, 0);
target = BitmapSource.Create( target = BitmapSource.Create(
source.PixelWidth, source.PixelHeight, source.DpiX, source.DpiY, source.PixelWidth, source.PixelHeight, source.DpiX, source.DpiY,
PixelFormats.Indexed8, new BitmapPalette(colors), buffer, source.PixelWidth); format, new BitmapPalette(colors), buffer, stride);
target.Freeze(); target.Freeze();
} }