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GeoImage implementation

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ClemensFischer 2024-09-02 15:49:53 +02:00
parent 07849eb1d8
commit 3468940ebf
6 changed files with 87 additions and 110 deletions
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32
MapControl/WPF/GeoImage.WPF.cs
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@ -6,46 +6,40 @@ using System;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
namespace MapControl
{
public partial class GeoImage : Image
public partial class GeoImage
{
private void SetImage(ImageSource image)
{
Source = image;
Stretch = Stretch.Fill;
}
private Point BitmapSize => new Point(bitmapSource.PixelWidth, bitmapSource.PixelHeight);
private static Task<GeoBitmap> ReadGeoTiffAsync(string sourcePath)
private Task LoadGeoTiffAsync(string sourcePath)
{
return Task.Run(() =>
{
var geoBitmap = new GeoBitmap();
using (var stream = File.OpenRead(sourcePath))
{
geoBitmap.Bitmap = BitmapFrame.Create(stream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
bitmapSource = BitmapFrame.Create(stream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
}
var metadata = (BitmapMetadata)geoBitmap.Bitmap.Metadata;
var metadata = (BitmapMetadata)bitmapSource.Metadata;
if (metadata.GetQuery(QueryString(ModelPixelScaleTag)) is double[] pixelScale &&
pixelScale.Length == 3 &&
metadata.GetQuery(QueryString(ModelTiePointTag)) is double[] tiePoint &&
tiePoint.Length >= 6)
{
geoBitmap.Transform = new Matrix(pixelScale[0], 0d, 0d, -pixelScale[1], tiePoint[3], tiePoint[4]);
transformMatrix = new Matrix(pixelScale[0], 0d, 0d, -pixelScale[1], tiePoint[3], tiePoint[4]);
}
else if (metadata.GetQuery(QueryString(ModelTransformationTag)) is double[] transformValues &&
transformValues.Length == 16)
{
geoBitmap.Transform = new Matrix(transformValues[0], transformValues[1],
transformValues[4], transformValues[5],
transformValues[3], transformValues[7]);
transformMatrix = new Matrix(transformValues[0], transformValues[1],
transformValues[4], transformValues[5],
transformValues[3], transformValues[7]);
}
else
{
@ -54,16 +48,14 @@ namespace MapControl
if (metadata.GetQuery(QueryString(GeoKeyDirectoryTag)) is short[] geoKeyDirectory)
{
geoBitmap.Projection = GetProjection(geoKeyDirectory);
SetProjection(geoKeyDirectory);
}
if (metadata.GetQuery(QueryString(NoDataTag)) is string noData &&
int.TryParse(noData, out int noDataValue))
{
geoBitmap.Bitmap = ConvertTransparentPixel(geoBitmap.Bitmap, noDataValue);
bitmapSource = ConvertTransparentPixel(bitmapSource, noDataValue);
}
return geoBitmap;
});
}