public TileBitmap CreateBitmapByTile(LevelDef level, int beginRow, int beginCol, int width, int height, TileIdentify tile, out bool memoryIsNotEnough)
{
memoryIsNotEnough = false;
try
{
T[][] buffers = null;
bool isOK = ReadRasterFile(out buffers, beginRow, beginCol, width, height, tile);
if (!isOK)
{
return(null);
}
TileBitmap tb = new TileBitmap();
tb.Level = level;
tb.Tile = tile;
tb.Bitmap = BuildBitmap(buffers, level, tile);
return(tb);
}
catch (OutOfMemoryException)
{
memoryIsNotEnough = true;
}
catch (ArgumentException)
{
memoryIsNotEnough = true;
}
return(null);
}
private void CreateLevelBufferWholeFile(FileStream fs, int bandNo, LevelDef levelDef)
{
Size lvSize = levelDef.Size;
float scale = levelDef.Scale;
int rowsOfBlock = lvSize.Height;
int blockCount = 0;
byte[] buffer = CreateBuffer(lvSize.Width, ref rowsOfBlock, out blockCount);
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
IntPtr bufferPointer = handle.AddrOfPinnedObject();
try
{
int bRow = 0, eRow = 0, actualRows = 0;
int oBeginRow = 0, oEndRow = 0;
IRasterBand raster = _dataProvider.GetRasterBand(bandNo);
for (int i = 0; i < blockCount; i++, bRow += rowsOfBlock)
{
eRow = Math.Min(bRow + rowsOfBlock, lvSize.Height);
actualRows = eRow - bRow;
oBeginRow = (int)(bRow / scale);
oEndRow = (int)(eRow / scale);
raster.Read(0, oBeginRow, raster.Width, oEndRow - oBeginRow,
bufferPointer, raster.DataType,
lvSize.Width, actualRows);
fs.Write(buffer, 0, actualRows * lvSize.Width * _dataTypeSize);
}
}
finally
{
handle.Free();
}
}
public LevelDef[] GetLevelDefs(int width, int height)
{
int rowCount = 0, colCount = 0;//not use
int levelCount = GetLevelCount(width, height);
List <LevelDef> levels = new List <LevelDef>(levelCount);
for (int i = 0; i < levelCount; i++)
{
Size size = GetSizeByLevel(i, width, height);
TileIdentify[] tiles = GetTileIdentifies(size.Width, size.Height, out rowCount, out colCount);
//
LevelDef level = new LevelDef();
level.Rows = rowCount;
level.Cols = colCount;
level.LevelNo = i;
level.Scale = Math.Max(size.Width / (float)width, size.Height / (float)height);
level.Size = size;
level.TileIdentities = tiles;
if (tiles != null)
{
foreach (TileIdentify t in tiles)
{
t.Level = level;
}
}
levels.Add(level);
}
return(levels.Count > 0 ? levels.ToArray() : null);
}
public int LoadTileBitmaps(LevelDef[] levels, bool isSync)
{
_levels = levels;
TileIdentify[] visibleTiles;
LevelDef nearestLevel;
_tilesLocator.Compute(_canvas, out nearestLevel, out visibleTiles);
if (nearestLevel.IsEmpty())
{
return(0);
}
try
{
_currentLevel = nearestLevel;
if (visibleTiles != null)
{
foreach (TileIdentify tile in visibleTiles)
{
if (isSync)//同步
{
LoadTileBitmap(tile);
}
else //异步
{
_loadStack.Push(tile);
}
}
}
return(visibleTiles != null ? visibleTiles.Length : 0);
}
finally
{
ReStartLoadWorker();
}
}
public TileIdentify[] GetVisibleTiles(out LevelDef level, out Rectangle rasterRect, out int bRow, out int bCol, out int rows, out int cols)
{
bRow = bCol = rows = cols = 0;
rasterRect = new Rectangle();
level = new LevelDef();
if (_levels == null)
{
return(null);
}
TileIdentify[] visibleTiles;
_tilesLocator.Compute(_canvas, out level, out visibleTiles);
goto firtTimes;
toUpLevel:
_tilesLocator.ComputeByLevel(_canvas, level, out visibleTiles);
firtTimes:
if (visibleTiles != null)
{
if (AllTilesIsExist(visibleTiles))
{
ComputeRasterRect(level, visibleTiles, out rasterRect);
GetRowColRange(visibleTiles, out bRow, out bCol, out rows, out cols);
}
else
{
if (level.LevelNo < _levels.Length - 1)
{
level = _levels[level.LevelNo + 1];
goto toUpLevel;
}
}
}
return(visibleTiles);
}
void CanvasEnvelopeChanged(object sender, EventArgs e)
{
TileIdentify[] visibleTiles;
LevelDef suitableLevel;
_tilesLocator.Compute(_canvas, out suitableLevel, out visibleTiles);
if (visibleTiles == null || visibleTiles.Length == 0)
{
return;
}
//visibleTiles的顺序需要调整
_tilesLocator.ComputeExtand(_canvas, suitableLevel, out visibleTiles);
_tileCacheManager.WaitLoading(visibleTiles);
_loadStack.Clear();
_tileCacheManager.ClearPastTiles(visibleTiles);
_currentLevel = suitableLevel;
_tilesLocator.GetRasterRowColOfViewWnd(_canvas, out _bRowAtViewWnd, out _bColAtViewWnd, out _widthAtViewWnd, out _heightAtViewWnd);
foreach (TileIdentify tile in visibleTiles)
{
if (!_tileCacheManager.IsExist(tile))
{
_loadStack.Push(tile);
ReStartLoadWorker();
}
}
}
private Bitmap BuildBitmap(T[][] buffers, LevelDef level, TileIdentify tile)
{
using (IBitmapBuilder <T> builder = GetBitmapBuilder())
{
Bitmap bitmap = null;
if (buffers.Length == 1)
{
bitmap = new Bitmap(_tileSize, _tileSize, PixelFormat.Format8bppIndexed);
bitmap.Palette = BitmapBuilderFactory.GetDefaultGrayColorPalette();
if (st1 == null && _stretcher == null)
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], ref bitmap);
}
else
{
if (_stretcher != null)
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], _stretcher, ref bitmap);
}
else
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], st1.Stretcher, ref bitmap);
}
}
//
if (_colorMapTable != null)
{
ColorPalette plt = BitmapBuilderFactory.GetDefaultGrayColorPalette();
for (int i = 0; i < 256; i++)
{
plt.Entries[i] = Color.Black;
}
int idx = 1;
foreach (ColorMapItem <int> item in _colorMapTable.Items)
{
for (int v = item.MinValue; v < item.MaxValue; v++)
{
plt.Entries[idx] = item.Color;
}
idx++;
}
bitmap.Palette = plt;
}
}
else if (buffers.Length == 3)
{
bitmap = new Bitmap(_tileSize, _tileSize, PixelFormat.Format24bppRgb);
if (st1 == null || st2 == null || st3 == null)
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], buffers[1], buffers[2], ref bitmap);
}
else
{
builder.Build(tile.Width, tile.Height, tile.OffsetX, tile.OffsetY, buffers[0], buffers[1], buffers[2], st1.Stretcher, st2.Stretcher, st3.Stretcher, ref bitmap);
}
}
return(bitmap);
}
}
public void ComputeByLevel(ICanvas canvas, LevelDef level, out TileIdentify[] tiles)
{
UpdateTileComputer(canvas);
int beginRow = 0, beginCol = 0, width = 0, height = 0;
GetRasterRowColOfViewWnd(canvas, out beginRow, out beginCol, out width, out height);
tiles = level.GetTileIdentifiesByOriginal(beginRow, beginCol, width, height);
}
public void ComputeExtand(ICanvas canvas, LevelDef level, out TileIdentify[] tiles)
{
double expandX = canvas.CurrentEnvelope.Width * canvas.CanvasSetting.XExpand;
double expandY = canvas.CurrentEnvelope.Height * canvas.CanvasSetting.YExpand;
int beginRow = 0, beginCol = 0, width = 0, height = 0;
GetRasterRowColOfViewWnd(canvas, expandX, expandY, out beginRow, out beginCol, out width, out height);
tiles = level.GetTileIdentifiesByOriginal(beginRow, beginCol, width, height);
}
public TileIdentify(int row, int col, int offsetX, int offsetY, int beginRow, int beginCol, int width, int height)
{
_row = row;
_col = col;
_offsetX = offsetX;
_offsetY = offsetY;
_beginRow = beginRow;
_beginCol = beginCol;
_width = width;
_height = height;
_level = new LevelDef();
}
public void ReLoadTileBitmapsBySync(LevelDef[] levels)
{
_levels = levels;
for (int i = levels.Length - 1; i >= 0; i--)
{
LevelDef lv = levels[i];
foreach (TileIdentify tile in lv.TileIdentities)
{
_loadStack.Push(tile);
}
}
ReStartLoadWorker();
}
private TileBitmap LoadTileBitmap(TileIdentify tile)
{
int beginRow = 0, beginCol = 0, width = 0, height = 0;
LevelDef level = tile.Level;
level.GetOriginalRowColByDataBlock(tile, ref beginRow, ref beginCol, ref width, ref height);
TileBitmap tb = _dataProviderReader.CreateBitmapByTile(level, beginRow, beginCol, width, height, tile);
if (!_disposed && tb != null)
{
_tileCacheManager.Put(tb);
}
return(tb);
}
public void ReLoadTileBitmapsBySync(LevelDef[] levels)
{
_levels = levels;
ComputeTotalTileCount();
for (int i = levels.Length - 1; i >= 0; i--)
{
LevelDef lv = levels[i];
foreach (TileIdentify tile in lv.TileIdentities)
{
_loadStack.Push(tile);
}
}
_loadWorker.RunWorkerAsync();
_loadWorkerIsStarted = true;
}
public void Compute(ICanvas canvas, out LevelDef level, out TileIdentify[] tiles)
{
level = new LevelDef();
tiles = null;
UpdateTileComputer(canvas);
level = GetNearestLevel(canvas);
if (level.IsEmpty())
{
return;
}
int beginRow = 0, beginCol = 0, width = 0, height = 0;
GetRasterRowColOfViewWnd(canvas, out beginRow, out beginCol, out width, out height);
tiles = level.GetTileIdentifiesByOriginal(beginRow, beginCol, width, height);
}
private TileBitmap LoadTileBitmap(TileIdentify tile, out bool memoryIsNotEnough)
{
memoryIsNotEnough = false;
int beginRow = 0, beginCol = 0, width = 0, height = 0;
LevelDef level = tile.Level;
level.GetOriginalRowColByDataBlock(tile, ref beginRow, ref beginCol, ref width, ref height);
TileBitmap tb = _dataProviderReader.CreateBitmapByTile(level, beginRow, beginCol, width, height, tile, out memoryIsNotEnough);
if (!_disposed && tb != null)
{
_tileCacheManager.Put(tb);
_loadedTitleCount++;
}
return(tb);
}
private LevelDef GetNearestLevel(ICanvas canvas)
{
float scale = 1 / (canvas.ResolutionX / _originalResolutionX);
float dlt = 0;
float minDlt = float.MaxValue;
LevelDef retLevel = new LevelDef();
foreach (LevelDef level in _leves)
{
dlt = Math.Abs(level.Scale - scale);
if (dlt < minDlt)
{
retLevel = level;
minDlt = dlt;
}
}
return(retLevel);
}
private void CreateLevelBuffer(int bandNo, LevelDef levelDef)
{
Size lvSize = levelDef.Size;
string fName = GetLevelBufferFileName(bandNo, levelDef);
if (File.Exists(fName) && (new FileInfo(fName)).Length == lvSize.Width * lvSize.Height * _dataTypeSize)
{
return;
}
float scale = levelDef.Scale;
int rowsOfBlock = lvSize.Height;
int blockCount = 0;
byte[] buffer = CreateBuffer(lvSize.Width, ref rowsOfBlock, out blockCount);
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
IntPtr bufferPointer = handle.AddrOfPinnedObject();
try
{
using (FileStream fs = new FileStream(fName, FileMode.Create))
{
int bRow = 0, eRow = 0, actualRows = 0;
int oBeginRow = 0, oEndRow = 0;
IRasterBand raster = _dataProvider.GetRasterBand(bandNo);
for (int i = 0; i < blockCount; i++, bRow += rowsOfBlock)
{
eRow = Math.Min(bRow + rowsOfBlock, lvSize.Height);
actualRows = eRow - bRow;
oBeginRow = (int)(bRow / scale);
oEndRow = (int)(eRow / scale);
raster.Read(0, oBeginRow, raster.Width, oEndRow - oBeginRow,
bufferPointer, raster.DataType,
lvSize.Width, actualRows);
fs.Write(buffer, 0, actualRows * lvSize.Width * _dataTypeSize);
}
}
}
finally
{
handle.Free();
}
}
public LevelDef GetSuitableLevel(LevelDef[] levels, int wndWidth, int wndHeight, int dataWidth, int dataHeight)
{
float scaleX = wndWidth / (float)dataWidth;
float scaleY = wndHeight / (float)dataHeight;
float scale = Math.Min(scaleX, scaleY);
float dlt = 0;
float minDlt = float.MaxValue;
LevelDef retLevel = new LevelDef();
foreach (LevelDef level in levels)
{
dlt = Math.Abs(level.Scale - scale);
if (dlt < minDlt)
{
retLevel = level;
minDlt = dlt;
}
}
return(retLevel);
}
void CanvasEnvelopeChanged(object sender, EventArgs e)
{
TileIdentify[] visibleTiles;
LevelDef suitableLevel;
_tilesLocator.Compute(_canvas, out suitableLevel, out visibleTiles);
if (visibleTiles == null)
{
return;
}
_currentLevel = suitableLevel;
_tilesLocator.GetRasterRowColOfViewWnd(_canvas, out _bRowAtViewWnd, out _bColAtViewWnd, out _widthAtViewWnd, out _heightAtViewWnd);
foreach (TileIdentify tile in visibleTiles)
{
if (!_tileCacheManager.IsExist(tile))
{
_loadStack.Push(tile);
}
}
}
public TileBitmap CreateBitmapByTile(LevelDef level, int beginRow, int beginCol, int width, int height, TileIdentify tile)
{
lock (_lockObj)
{
T[][] buffers = null;
//从磁盘中读取缓存的瓦片
tryAgainLine:
if (_enableDiskCache && _fileDiskCacheManager.IsExist(tile, _selectedBandNos))
{
buffers = new T[_selectedBandNos.Length][];
for (int i = 0; i < _selectedBandNos.Length; i++)
{
buffers[i] = _fileDiskCacheManager.GetTile <T>(tile, _selectedBandNos[i]);
if (buffers[i] == null)//缓存已经从磁盘清除
{
goto tryAgainLine;
}
}
}
else
{
bool isOK = ReadRasterFile(out buffers, beginRow, beginCol, width, height, tile);
if (!isOK)
{
return(null);
}
Console.WriteLine("direct read , " + Environment.TickCount.ToString());
//将该瓦片保存在磁盘
if (_enableDiskCache)
{
_asyncCacheHandler.BeginInvoke(buffers, tile, _selectedBandNos, null, null);
}
}
TileBitmap tb = new TileBitmap();
tb.Level = level;
tb.Tile = tile;
tb.Bitmap = BuildBitmap(buffers, level, tile);
return(tb);
}
}
private void CreateBufferByTile(LevelDef levelDef, int bandNo)
{
TileIdentify[] tiles = levelDef.TileIdentities;
if (tiles == null || tiles.Length == 0)
{
return;
}
byte[] buffer = new byte[_tileSetting.TileSize * _tileSetting.TileSize * _dataTypeSize];
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
IntPtr ptr = handle.AddrOfPinnedObject();
float scale = levelDef.Scale;
try
{
int oBeginRow, oBeginCol, oWidth, oHeight;
IRasterBand raster = _dataProvider.GetRasterBand(bandNo);
foreach (TileIdentify tile in tiles)
{
string fName = GetTileBufferFileName(tile, bandNo) + "_" + tile.Width.ToString() + "_" + tile.Height + ".RAW";
if (File.Exists(fName) && (new FileInfo(fName)).Length == tile.Width * tile.Height * _dataTypeSize)
{
continue;
}
oBeginRow = (int)(tile.BeginRow / scale);
oBeginCol = (int)(tile.BeginCol / scale);
oWidth = (int)(tile.Width / scale);
oHeight = (int)(tile.Height / scale);
raster.Read(oBeginCol, oBeginRow, oWidth, oHeight, ptr, raster.DataType, tile.Width, tile.Height);
using (FileStream fs = new FileStream(fName, FileMode.Create))
{
fs.Write(buffer, 0, tile.Width * tile.Height * _dataTypeSize);
}
}
}
finally
{
handle.Free();
}
}
private void ComputeRasterRect(LevelDef level, TileIdentify[] visibleTiles, out Rectangle rasterRect)
{
rasterRect = new Rectangle();
if (visibleTiles == null)
{
return;
}
int x = 0, y = 0, w = 0, h = 0;
int tileSize = _tileSetting.TileSize;
int top = int.MaxValue, bottom = int.MinValue;
int left = int.MaxValue, right = int.MinValue;
foreach (TileIdentify tile in visibleTiles)
{
level.GetOriginalRowCol(tileSize, tile, ref y, ref x, ref w, ref h);
if (x < left)
{
left = x;
}
if ((x + w) > right)
{
right = x + w;
}
if (y < top)
{
top = y;
}
if ((y + h) > bottom)
{
bottom = y + h;
}
}
rasterRect.X = left;
rasterRect.Y = top;
rasterRect.Width = right - left;
rasterRect.Height = bottom - top;
}
public int LoadTileBitmaps(LevelDef[] levels, bool isSync)
{
_levels = levels;
ComputeTotalTileCount();
//同步加载最适合的级别(修改为异步5.15)
TileIdentify[] visibleTiles;
LevelDef nearestLevel;
_tilesLocator.Compute(_canvas, out nearestLevel, out visibleTiles);
if (nearestLevel.IsEmpty())
{
return(0);
}
_currentLevel = nearestLevel;
if (visibleTiles != null)
{
foreach (TileIdentify tile in visibleTiles)
{
bool memoryIsNotEnough = false;
if (isSync)//同步
{
LoadTileBitmap(tile, out memoryIsNotEnough);
if (memoryIsNotEnough)
{
Console.WriteLine("LoadTileBitmaps：内存不足，无法完成请求的瓦片！");
return(0);
}
}
else //异步
{
_loadStack.Push(tile);
}
}
foreach (TileIdentify tile in nearestLevel.TileIdentities)
{
if (Array.IndexOf(visibleTiles, tile) < 0)
{
_loadStack.Push(tile);
}
}
}
else
{
foreach (TileIdentify tile in nearestLevel.TileIdentities)
{
_loadStack.Push(tile);
}
}
//MessageBox.Show("最小层加载完毕");
//将剩余级别插入异步装载队列(从低分辨率开始)
for (int i = levels.Length - 1; i >= 0; i--)
{
LevelDef lv = levels[i];
if (lv.LevelNo != nearestLevel.LevelNo)
{
foreach (TileIdentify tile in lv.TileIdentities)
{
_loadStack.Push(tile);
}
}
}
//MessageBox.Show("剩余层已添加到队列");
_loadWorker.RunWorkerAsync();
_loadWorkerIsStarted = true;
//MessageBox.Show("异步加载已启动");
return(visibleTiles != null ? visibleTiles.Length : 0);
}
public TileBitmap GetTileBitmap(TileIdentify tile)
{
LevelDef level = tile.Level;
return(_tileCacheManager.Get(level.LevelNo, tile.Row, tile.Col));
}
private void PrintCurrentLevel(LevelDef nearestLevel, ICanvas canvas)
{
Console.WriteLine(nearestLevel.ToString());
Console.Write(" ");
Console.WriteLine((1 / canvas.ResolutionX).ToString());
}
private string GetLevelBufferFileName(int bandNo, LevelDef levelDef)
{
return(Path.Combine(_fDir, string.Format("B{0}_L{1}", bandNo, levelDef.LevelNo)));
}
