|
public static SaveJpeg ( |
||
| bitmap | ||
| fileName | string | |
| quality | int | |
| return | void | |
// Create a bitmap file of the mapDisplay supplied at construction.
// If mapperForWorldFile is not null and real world coords are defined, also create a world file.
public void CreateBitmap(string fileName, RectangleF rect, ImageFormat imageFormat, float dpi, CoordinateMapper mapperForWorldFile)
{
float bitmapWidth, bitmapHeight; // size of the bitmap in pixels.
int pixelWidth, pixelHeight; // bitmapWidth/Height, rounded up to integer.
bitmapWidth = (rect.Width / 25.4F) * dpi;
bitmapHeight = (rect.Height / 25.4F) * dpi;
pixelWidth = (int)Math.Ceiling(bitmapWidth);
pixelHeight = (int)Math.Ceiling(bitmapHeight);
Bitmap bitmap = new Bitmap(pixelWidth, pixelHeight, PixelFormat.Format24bppRgb);
bitmap.SetResolution(dpi, dpi);
// Set the transform
Matrix transform = Geometry.CreateInvertedRectangleTransform(rect, new RectangleF(0, 0, bitmapWidth, bitmapHeight));
// And draw.
mapDisplay.Draw(bitmap, transform);
// JPEG and GIF have special code paths because the default Save method isn't
// really good enough.
if (imageFormat == ImageFormat.Jpeg)
{
BitmapUtil.SaveJpeg(bitmap, fileName, 80);
}
else if (imageFormat == ImageFormat.Gif)
{
BitmapUtil.SaveGif(bitmap, fileName);
}
else
{
bitmap.Save(fileName, imageFormat);
}
bitmap.Dispose();
if (mapperForWorldFile != null && mapperForWorldFile.HasRealWorldCoords)
{
string extension = Path.GetExtension(fileName);
string worldFileName = Path.ChangeExtension(fileName, WorldFileExtension(extension));
CreateWorldFile(worldFileName, rect, bitmapWidth, bitmapHeight, mapperForWorldFile);
}
}
