I am able to convert a single page TIFF to a PNG in .Net, however, how would I do this for a multipage TIFF?
thanks @Tom Halladay
I'll provide a c# version of your code
private static Bitmap ConvertTiffToBitmapStream(byte[] tiffImage){
System.Drawing.Image ImageBitmap = Bitmap.FromStream(new MemoryStream(tiffImage));
int FrameCount = ImageBitmap.GetFrameCount(FrameDimension.Page);
int RunningHeight = 0;
int MaxWidth = 0;
for (int MeasurementFrameIndex = 0; MeasurementFrameIndex <= FrameCount - 1; MeasurementFrameIndex++){
ImageBitmap.SelectActiveFrame(FrameDimension.Page, MeasurementFrameIndex);
RunningHeight += ImageBitmap.Height;
MaxWidth = Math.Max(MaxWidth, ImageBitmap.Width);
}
Bitmap CombinedBitmap = new Bitmap(MaxWidth, RunningHeight);
int RunningVerticalPosition = 0;
for (int CombinationFrameIndex = 0; CombinationFrameIndex <= FrameCount - 1; CombinationFrameIndex++){
ImageBitmap.SelectActiveFrame(FrameDimension.Page, CombinationFrameIndex);
EmbedBitmap(new Bitmap(ImageBitmap), ref CombinedBitmap, RunningVerticalPosition);
RunningVerticalPosition += ImageBitmap.Height + 1;
}
return CombinedBitmap;
}
private static void EmbedBitmap(Bitmap SourceBitmap, ref Bitmap DestinationBitmap, int VerticalPosition){
Rectangle SourceRectangle = new Rectangle(new Point(0, 0), new Size(SourceBitmap.Width, SourceBitmap.Height));
Rectangle DestinationRectangle = new Rectangle(new Point(0, VerticalPosition), new Size(SourceBitmap.Width, SourceBitmap.Height));
using (Graphics Canvas = Graphics.FromImage(DestinationBitmap)){
Canvas.DrawImage(SourceBitmap, DestinationRectangle, SourceRectangle, GraphicsUnit.Pixel);
}
}