public IRasterBand[] Clip(IRasterBand srcBand, BlockDef[] blockDefs, int samplePercent, string driver, Action <int, string> progressCallback, params object[] options)
{
if (blockDefs.Length == 0 || blockDefs == null || srcBand == null)
{
return(null);
}
IRasterBand[] targetBands = new IRasterBand[blockDefs.Length];
int blockNums = 0;
foreach (BlockDef it in blockDefs)
{
int tBeginRow = -1, tEndRow = -1, tBeginCol = -1, tEndCol = -1;
int oBeginRow = -1, oEndRow = -1, oBeginCol = -1, oEndCol = -1;
CoordEnvelope oEnvelope = srcBand.CoordEnvelope;
CoordEnvelope tEnvelope = it.ToEnvelope();
Size oSize = new Size(srcBand.Width, srcBand.Height);
Size tSize = ClipCutHelper.GetTargetSize(it, srcBand.ResolutionX, srcBand.ResolutionY);
bool isInternal = new RasterMoasicClipHelper().ComputeBeginEndRowCol(oEnvelope, oSize, tEnvelope, tSize, ref oBeginRow, ref oBeginCol, ref oEndRow, ref oEndCol,
ref tBeginRow, ref tBeginCol, ref tEndRow, ref tEndCol);
IRasterDataDriver rasterDriver = GeoDataDriver.GetDriverByName(driver) as IRasterDataDriver;
//targetBands[blockNums] = ;
blockNums++;
}
return(targetBands);
}
public IRasterDataProvider[] Clip(IRasterDataProvider srcRaster, BlockDef[] blockDefs, int samplePercent, string driver, string outdir, Action <int, string> progressCallback, params object[] options)
{
IRasterDataProvider[] tProviders = new IRasterDataProvider[blockDefs.Length];
if (progressCallback != null)
{
progressCallback(0, "开始数据分幅");
}
for (int blockNums = 0; blockNums < blockDefs.Length; blockNums++)
{
if (progressCallback != null)
{
progressCallback((int)((blockNums + 1.0) / blockDefs.Length * 100), string.Format("正在分幅第{0}/{1}个文件...", (blockNums + 1).ToString(), blockDefs.Length));
}
//位置映射参数
int tBeginRow = -1, tEndRow = -1, tBeginCol = -1, tEndCol = -1;
int oBeginRow = -1, oEndRow = -1, oBeginCol = -1, oEndCol = -1;
CoordEnvelope oEnvelope = srcRaster.CoordEnvelope;
CoordEnvelope tEnvelope = blockDefs[blockNums].ToEnvelope();
Size oSize = new Size(srcRaster.Width, srcRaster.Height);
Size tSize = ClipCutHelper.GetTargetSize(blockDefs[blockNums], srcRaster.ResolutionX, srcRaster.ResolutionY);
bool isInternal = new RasterMoasicClipHelper().ComputeBeginEndRowCol(oEnvelope, oSize, tEnvelope, tSize, ref oBeginRow, ref oBeginCol, ref oEndRow, ref oEndCol,
ref tBeginRow, ref tBeginCol, ref tEndRow, ref tEndCol);
string blockFilename = ClipCutHelper.GetBlockFilename(blockDefs[blockNums], srcRaster.fileName, outdir, driver);
IRasterDataDriver rasterDriver = GeoDataDriver.GetDriverByName(driver) as IRasterDataDriver;
int oWidth = 0;
int oHeight = 0;
float tResolutionX;
float tResolutionY;
if (samplePercent > 0 && samplePercent < 100)
{
oHeight = (int)(tSize.Width * samplePercent * 1f / 100 + 0.5);
oWidth = (int)(tSize.Width * samplePercent * 1f / 100 + 0.5);
tResolutionX = srcRaster.ResolutionX * samplePercent * 1f / 100;
tResolutionY = srcRaster.ResolutionY * samplePercent * 1f / 100;
}
else
{
oHeight = tSize.Height;
oWidth = tSize.Width;
tResolutionX = srcRaster.ResolutionX;
tResolutionY = srcRaster.ResolutionY;
}
string[] optionString = new string[] {
"INTERLEAVE=BSQ",
"VERSION=LDF",
"WITHHDR=TRUE",
"SPATIALREF=" + srcRaster.SpatialRef.ToProj4String(),
"MAPINFO={" + 1 + "," + 1 + "}:{" + tEnvelope.MinX + "," + tEnvelope.MaxY + "}:{" + tResolutionX + "," + tResolutionY + "}"
};
tProviders[blockNums] = rasterDriver.Create(blockFilename, oWidth, oHeight, srcRaster.BandCount, srcRaster.DataType, optionString);
int rowStep = ClipCutHelper.ComputeRowStep(srcRaster, oBeginRow, oEndRow);
for (int oRow = oBeginRow; oRow < oEndRow; oRow += rowStep)
{
if (oRow + rowStep > oEndRow)
{
rowStep = oEndRow - oRow;
}
for (int bandIndex = 1; bandIndex <= srcRaster.BandCount; bandIndex++)
{
int sample = (oEndCol - oBeginCol);
int typeSize = ClipCutHelper.GetSize(srcRaster.DataType);
int bufferSize = sample * rowStep * typeSize;
byte[] databuffer = new byte[bufferSize];
unsafe
{
fixed(byte *ptr = databuffer)
{
IntPtr buffer = new IntPtr(ptr);
srcRaster.GetRasterBand(bandIndex).Read(oBeginCol, oRow, sample, rowStep, buffer, srcRaster.DataType, sample, rowStep);
if (samplePercent > 0 && samplePercent < 100)
{
tProviders[blockNums].GetRasterBand(bandIndex).Write((int)(tBeginCol * samplePercent * 1f / 100 + 0.5), (int)((tBeginRow + (oRow - oBeginRow)) * samplePercent * 1f / 100 + 0.5), (int)(sample * samplePercent * 1f / 100 + 0.5), (int)(rowStep * samplePercent * 1f / 100 + 0.5), buffer, srcRaster.DataType, (int)(sample * samplePercent * 1f / 100 + 0.5), (int)(rowStep * samplePercent * 1f / 100 + 0.5));
}
else
{
tProviders[blockNums].GetRasterBand(bandIndex).Write(tBeginCol, tBeginRow + (oRow - oBeginRow), sample, rowStep, buffer, srcRaster.DataType, sample, rowStep);
}
}
}
}
}
}
return(tProviders);
}
public IRasterDataProvider Clip(IRasterDataProvider srcRaster, BlockDef blockDefs, int samplePercent, string driver, string outdir, Action <int, string> progressCallback, out double validPercent, params object[] options)
{
IRasterDataProvider tProviders = null;
if (progressCallback != null)
{
progressCallback(0, "开始数据分幅");
}
//位置映射参数
int tBeginRow = -1, tEndRow = -1, tBeginCol = -1, tEndCol = -1;
int oBeginRow = -1, oEndRow = -1, oBeginCol = -1, oEndCol = -1;
CoordEnvelope oEnvelope = srcRaster.CoordEnvelope;
CoordEnvelope tEnvelope = blockDefs.ToEnvelope();
Size oSize = new Size(srcRaster.Width, srcRaster.Height);
Size tSize = ClipCutHelper.GetTargetSize(blockDefs, srcRaster.ResolutionX, srcRaster.ResolutionY);
bool isInternal = new RasterMoasicClipHelper().ComputeBeginEndRowCol(oEnvelope, oSize, tEnvelope, tSize, ref oBeginRow, ref oBeginCol, ref oEndRow, ref oEndCol,
ref tBeginRow, ref tBeginCol, ref tEndRow, ref tEndCol);
string blockFilename = ClipCutHelper.GetBlockFilename(blockDefs, srcRaster.fileName, outdir, driver);
IRasterDataDriver rasterDriver = GeoDataDriver.GetDriverByName(driver) as IRasterDataDriver;
int oWidth = 0;
int oHeight = 0;
float tResolutionX;
float tResolutionY;
if (samplePercent > 0 && samplePercent < 100)
{
oHeight = (int)(tSize.Width * samplePercent * 1f / 100 + 0.5);
oWidth = (int)(tSize.Width * samplePercent * 1f / 100 + 0.5);
tResolutionX = srcRaster.ResolutionX * samplePercent * 1f / 100;
tResolutionY = srcRaster.ResolutionY * samplePercent * 1f / 100;
}
else
{
oHeight = tSize.Height;
oWidth = tSize.Width;
tResolutionX = srcRaster.ResolutionX;
tResolutionY = srcRaster.ResolutionY;
}
string[] optionString = new string[] {
"INTERLEAVE=BSQ",
"VERSION=LDF",
"WITHHDR=TRUE",
"SPATIALREF=" + srcRaster.SpatialRef.ToProj4String(),
"MAPINFO={" + 1 + "," + 1 + "}:{" + tEnvelope.MinX + "," + tEnvelope.MaxY + "}:{" + tResolutionX + "," + tResolutionY + "}"
};
tProviders = rasterDriver.Create(blockFilename, oWidth, oHeight, srcRaster.BandCount, srcRaster.DataType, optionString);
int rowStep = ClipCutHelper.ComputeRowStep(srcRaster, oBeginRow, oEndRow);
int sample = (oEndCol - oBeginCol);
int typeSize = ClipCutHelper.GetSize(srcRaster.DataType);
long allPixelByte = sample * (oEndRow - oBeginRow) * typeSize * srcRaster.BandCount;
long validPixelByte = 0;
long validPer = (int)(allPixelByte * 0.1f);
int stepCount = (int)((oEndRow - oBeginRow) / rowStep + 0.5) * srcRaster.BandCount;
int step = 0;
int percent = 0;
for (int oRow = oBeginRow; oRow < oEndRow; oRow += rowStep)
{
if (oRow + rowStep > oEndRow)
{
rowStep = oEndRow - oRow;
}
for (int bandIndex = 1; bandIndex <= srcRaster.BandCount; bandIndex++)
{
step++;
percent = (int)(step * 1.0f / stepCount * 100);
if (progressCallback != null)
{
progressCallback(percent, "完成数据分幅" + percent + "%");
}
int bufferSize = sample * rowStep * typeSize;
byte[] databuffer = new byte[bufferSize];
unsafe
{
fixed(byte *ptr = databuffer)
{
IntPtr buffer = new IntPtr(ptr);
srcRaster.GetRasterBand(bandIndex).Read(oBeginCol, oRow, sample, rowStep, buffer, srcRaster.DataType, sample, rowStep);
if (validPixelByte < validPer)
{
foreach (byte b in databuffer)
{
if (b != 0)
{
validPixelByte++;
}
}
}
if (validPixelByte == 0)
{
continue;
}
if (samplePercent > 0 && samplePercent < 100)
{
tProviders.GetRasterBand(bandIndex).Write((int)(tBeginCol * samplePercent * 1f / 100 + 0.5), (int)((tBeginRow + (oRow - oBeginRow)) * samplePercent * 1f / 100 + 0.5), (int)(sample * samplePercent * 1f / 100 + 0.5), (int)(rowStep * samplePercent * 1f / 100 + 0.5), buffer, srcRaster.DataType, (int)(sample * samplePercent * 1f / 100 + 0.5), (int)(rowStep * samplePercent * 1f / 100 + 0.5));
}
else
{
tProviders.GetRasterBand(bandIndex).Write(tBeginCol, tBeginRow + (oRow - oBeginRow), sample, rowStep, buffer, srcRaster.DataType, sample, rowStep);
}
}
}
}
}
validPercent = validPixelByte * 1.0d / allPixelByte;
if (progressCallback != null)
{
progressCallback(100, "完成数据分幅");
}
return(tProviders);
}