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ClemensFischer 2026-04-13 17:14:49 +02:00
parent c14377f976
commit 65aba44af6
152 changed files with 11962 additions and 12115 deletions
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123
MBTiles/Shared/MBTileSource.cs
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@ -13,74 +13,73 @@ using Microsoft.UI.Xaml.Media;
using ImageSource = Avalonia.Media.IImage;
#endif
namespace MapControl.MBTiles
namespace MapControl.MBTiles;
public sealed partial class MBTileSource : TileSource, IDisposable
{
public sealed partial class MBTileSource : TileSource, IDisposable
private static ILogger Logger => field ??= ImageLoader.LoggerFactory?.CreateLogger<MBTileSource>();
private SQLiteConnection connection;
public IDictionary<string, string> Metadata { get; } = new Dictionary<string, string>();
public async Task OpenAsync(string file)
{
private static ILogger Logger => field ??= ImageLoader.LoggerFactory?.CreateLogger<MBTileSource>();
Close();
private SQLiteConnection connection;
connection = new SQLiteConnection("Data Source=" + FilePath.GetFullPath(file) + ";Read Only=True");
public IDictionary<string, string> Metadata { get; } = new Dictionary<string, string>();
await connection.OpenAsync();
public async Task OpenAsync(string file)
using var command = new SQLiteCommand("select * from metadata", connection);
var reader = await command.ExecuteReaderAsync();
while (await reader.ReadAsync())
{
Close();
connection = new SQLiteConnection("Data Source=" + FilePath.GetFullPath(file) + ";Read Only=True");
await connection.OpenAsync();
using var command = new SQLiteCommand("select * from metadata", connection);
var reader = await command.ExecuteReaderAsync();
while (await reader.ReadAsync())
{
Metadata[(string)reader["name"]] = (string)reader["value"];
}
}
public void Close()
{
if (connection != null)
{
Metadata.Clear();
connection.Dispose();
connection = null;
}
}
public void Dispose()
{
Close();
}
public override async Task<ImageSource> LoadImageAsync(int zoomLevel, int column, int row)
{
ImageSource image = null;
try
{
using var command = new SQLiteCommand("select tile_data from tiles where zoom_level=@z and tile_column=@x and tile_row=@y", connection);
command.Parameters.AddWithValue("@z", zoomLevel);
command.Parameters.AddWithValue("@x", column);
command.Parameters.AddWithValue("@y", (1 << zoomLevel) - row - 1);
var buffer = (byte[])await command.ExecuteScalarAsync();
if (buffer?.Length > 0)
{
image = await ImageLoader.LoadImageAsync(buffer);
}
}
catch (Exception ex)
{
Logger?.LogError(ex, "LoadImageAsync");
}
return image;
Metadata[(string)reader["name"]] = (string)reader["value"];
}
}
public void Close()
{
if (connection != null)
{
Metadata.Clear();
connection.Dispose();
connection = null;
}
}
public void Dispose()
{
Close();
}
public override async Task<ImageSource> LoadImageAsync(int zoomLevel, int column, int row)
{
ImageSource image = null;
try
{
using var command = new SQLiteCommand("select tile_data from tiles where zoom_level=@z and tile_column=@x and tile_row=@y", connection);
command.Parameters.AddWithValue("@z", zoomLevel);
command.Parameters.AddWithValue("@x", column);
command.Parameters.AddWithValue("@y", (1 << zoomLevel) - row - 1);
var buffer = (byte[])await command.ExecuteScalarAsync();
if (buffer?.Length > 0)
{
image = await ImageLoader.LoadImageAsync(buffer);
}
}
catch (Exception ex)
{
Logger?.LogError(ex, "LoadImageAsync");
}
return image;
}
}