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Avalonia GeoImage

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ClemensFischer 2024-05-31 19:51:37 +02:00
parent 5718f68608
commit 1f72ddd76d
6 changed files with 97 additions and 100 deletions
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22
MapControl/WPF/GeoImage.WPF.cs
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@ -17,30 +17,28 @@ namespace MapControl
{
return await Task.Run(() =>
{
BitmapSource bitmap;
Matrix transform;
MapProjection projection = null;
var geoBitmap = new GeoBitmap();
using (var stream = File.OpenRead(sourcePath))
{
bitmap = BitmapFrame.Create(stream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
geoBitmap.Bitmap = BitmapFrame.Create(stream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
}
var metadata = (BitmapMetadata)bitmap.Metadata;
var metadata = (BitmapMetadata)geoBitmap.Bitmap.Metadata;
if (metadata.GetQuery(QueryString(ModelPixelScaleTag)) is double[] pixelScale &&
pixelScale.Length == 3 &&
metadata.GetQuery(QueryString(ModelTiePointTag)) is double[] tiePoint &&
tiePoint.Length >= 6)
{
transform = new Matrix(pixelScale[0], 0d, 0d, -pixelScale[1], tiePoint[3], tiePoint[4]);
geoBitmap.Transform = new Matrix(pixelScale[0], 0d, 0d, -pixelScale[1], tiePoint[3], tiePoint[4]);
}
else if (metadata.GetQuery(QueryString(ModelTransformationTag)) is double[] transformValues &&
transformValues.Length == 16)
{
transform = new Matrix(transformValues[0], transformValues[1],
transformValues[4], transformValues[5],
transformValues[3], transformValues[7]);
geoBitmap.Transform = new Matrix(transformValues[0], transformValues[1],
transformValues[4], transformValues[5],
transformValues[3], transformValues[7]);
}
else
{
@ -49,16 +47,16 @@ namespace MapControl
if (metadata.GetQuery(QueryString(GeoKeyDirectoryTag)) is short[] geoKeyDirectory)
{
projection = GetProjection(sourcePath, geoKeyDirectory);
geoBitmap.Projection = GetProjection(sourcePath, geoKeyDirectory);
}
if (metadata.GetQuery(QueryString(NoDataTag)) is string noData &&
int.TryParse(noData, out int noDataValue))
{
bitmap = ConvertTransparentPixel(bitmap, noDataValue);
geoBitmap.Bitmap = ConvertTransparentPixel(geoBitmap.Bitmap, noDataValue);
}
return new GeoBitmap(bitmap, transform, projection);
return geoBitmap;
});
}