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C# Dataset.ReadRaster方法代碼示例

本文整理匯總了C#中OSGeo.GDAL.Dataset.ReadRaster方法的典型用法代碼示例。如果您正苦於以下問題:C# Dataset.ReadRaster方法的具體用法?C# Dataset.ReadRaster怎麽用?C# Dataset.ReadRaster使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在OSGeo.GDAL.Dataset的用法示例。


在下文中一共展示了Dataset.ReadRaster方法的2個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的C#代碼示例。

示例1: SaveBitmapDirect


//.........這裏部分代碼省略.........
        else
        {
            if (channelCount == 1)
            {
                if (channelSize > 8)
                {
                    pixelFormat = PixelFormat.Format16bppGrayScale;
                    dataType = DataType.GDT_Int16;
                    pixelSpace = 2;
                }
                else
                {
                    pixelFormat = PixelFormat.Format24bppRgb;
                    channelCount = 3;
                    dataType = DataType.GDT_Byte;
                    pixelSpace = 3;
                }
            }
            else
            {
                if (hasAlpha)
                {
                    if (channelSize > 8)
                    {
                        pixelFormat = PixelFormat.Format64bppArgb;
                        dataType = DataType.GDT_UInt16;
                        pixelSpace = 8;
                    }
                    else
                    {
                        pixelFormat = PixelFormat.Format32bppArgb;
                        dataType = DataType.GDT_Byte;
                        pixelSpace = 4;
                    }
                    channelCount = 4;
                }
                else
                {
                    if (channelSize > 8)
                    {
                        pixelFormat = PixelFormat.Format48bppRgb;
                        dataType = DataType.GDT_UInt16;
                        pixelSpace = 6;
                    }
                    else
                    {
                        pixelFormat = PixelFormat.Format24bppRgb;
                        dataType = DataType.GDT_Byte;
                        pixelSpace = 3;
                    }
                    channelCount = 3;
                }
            }
        }

        // Create a Bitmap to store the GDAL image in
        Bitmap bitmap = new Bitmap(imageWidth, imageHeight, pixelFormat);

        if (isIndexed)
        {
            // setting up the color table
            if (ct != null)
            {
                int iCol = ct.GetCount();
                ColorPalette pal = bitmap.Palette;
                for (int i = 0; i < iCol; i++)
                {
                    ColorEntry ce = ct.GetColorEntry(i);
                    pal.Entries[i] = Color.FromArgb(ce.c4, ce.c1, ce.c2, ce.c3);
                }
                bitmap.Palette = pal;
            }
            else
            {
                // grayscale
                ColorPalette pal = bitmap.Palette;
                for (int i = 0; i < 256; i++)
                    pal.Entries[i] = Color.FromArgb(255, i, i, i);
                bitmap.Palette = pal;
            }
        }

        // Use GDAL raster reading methods to read the image data directly into the Bitmap
        BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, imageWidth, imageHeight), ImageLockMode.ReadWrite, pixelFormat);

        try
        {
            int stride = bitmapData.Stride;
            IntPtr buf = bitmapData.Scan0;

            ds.ReadRaster(xOff, yOff, width, height, buf, imageWidth, imageHeight, dataType,
                channelCount, bandMap, pixelSpace, stride, 1);
        }
        finally
        {
            bitmap.UnlockBits(bitmapData);
        }

        bitmap.Save(filename);
    }
開發者ID:jay1204,項目名稱:SOD-modeling-cpp,代碼行數:101,代碼來源:GDALDatasetRasterIO.cs

示例2: LoadBitmapDirect

    private static void LoadBitmapDirect(Dataset ds, Bitmap bitmap, int xOff, int yOff, int width, int height, int imageWidth, int imageHeight, int iOverview)
    {
        if (isIndexed)
        {
            // setting up the color table
            if (ct != null)
            {
                int iCol = ct.GetCount();
                ColorPalette pal = bitmap.Palette;
                for (int i = 0; i < iCol; i++)
                {
                    ColorEntry ce = ct.GetColorEntry(i);
                    pal.Entries[i] = Color.FromArgb(ce.c4, ce.c1, ce.c2, ce.c3);
                }
                bitmap.Palette = pal;
            }
            else
            {
                // grayscale
                ColorPalette pal = bitmap.Palette;
                for (int i = 0; i < 256; i++)
                    pal.Entries[i] = Color.FromArgb(255, i, i, i);
                bitmap.Palette = pal;
            }
        }

        // Use GDAL raster reading methods to read the image data directly into the Bitmap
        BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, imageWidth, imageHeight), ImageLockMode.ReadWrite, pixelFormat);

        try
        {
            int stride = bitmapData.Stride;
            IntPtr buf = bitmapData.Scan0;

            ds.ReadRaster(xOff, yOff, width, height, buf, imageWidth, imageHeight, dataType,
                channelCount, bandMap, pixelSpace, stride, 1);
        }
        finally
        {
            bitmap.UnlockBits(bitmapData);
        }
    }
開發者ID:wlhm1984,項目名稱:osgEarthX,代碼行數:42,代碼來源:GDALAdjustContrast.cs


注:本文中的OSGeo.GDAL.Dataset.ReadRaster方法示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台,相關代碼片段篩選自各路編程大神貢獻的開源項目,源碼版權歸原作者所有,傳播和使用請參考對應項目的License;未經允許,請勿轉載。