private static void WriteMeta(BinaryWriter bw, ImageInfoBase imageInfo)
{
bw.Write(imageInfo.HorizontalRes);
bw.Write(imageInfo.VerticalRes);
bw.Write(imageInfo.Size.Width);
bw.Write(imageInfo.Size.Height);
bw.Write((int)imageInfo.PixelFormat);
bw.Write(imageInfo.RawFormat.ToByteArray());
bw.Write(imageInfo.Palette.Length);
foreach (Color color in imageInfo.Palette)
{
bw.Write(color.ToArgb());
}
}
private static void ReadMeta(BinaryReader br, ImageInfoBase imageInfo)
{
imageInfo.HorizontalRes = br.ReadSingle();
imageInfo.VerticalRes = br.ReadSingle();
imageInfo.Size = new Size(br.ReadInt32(), br.ReadInt32());
imageInfo.PixelFormat = (PixelFormat)br.ReadInt32();
imageInfo.RawFormat = new Guid(br.ReadBytes(16));
var palette = new Color[br.ReadInt32()];
imageInfo.Palette = palette;
for (int i = 0; i < palette.Length; i++)
{
palette[i] = Color.FromArgb(br.ReadInt32());
}
}
public static Drawing CreateDrawing(
WordprocessingDocument package,
Stream imageStream,
ImagePartType imagePartType,
int percentage, long maxWidthInEmus)
{
var imagePart = package.MainDocumentPart.AddImagePart(imagePartType);
#if NET35 || NET45
var img = new BitmapImage();
using (imageStream)
{
img.BeginInit();
img.StreamSource = imageStream;
img.EndInit();
imageStream.Seek(0, SeekOrigin.Begin);
imagePart.FeedData(imageStream);
// imagePart will also dispose the stream.
}
var widthPx = img.PixelWidth;
var heightPx = img.PixelHeight;
var horzRezDpi = (int)img.DpiX;
var vertRezDpi = (int)img.DpiY;
#else
ImageInfoBase imageInfo = null;
using (imageStream)
{
var type = GetImageInfoType(imagePartType);
imageInfo = ImageInfo.GetInfo(type, imageStream);
if (imageInfo == null)
{
throw new ArgumentException("Unsupported image format.");
}
imageStream.Seek(0, SeekOrigin.Begin);
imagePart.FeedData(imageStream);
// imagePart will also dispose the stream.
}
var widthPx = imageInfo.Width;
var heightPx = imageInfo.Height;
var horzRezDpi = imageInfo.DpiH;
var vertRezDpi = imageInfo.DpiV;
#endif
const int emusPerInch = 914400;
var widthEmus = (long)widthPx * emusPerInch / horzRezDpi;
var heightEmus = (long)heightPx * emusPerInch / vertRezDpi;
if (widthEmus > maxWidthInEmus)
{
var ratio = heightEmus * 1.0m / widthEmus;
widthEmus = maxWidthInEmus;
heightEmus = (long)(widthEmus * ratio);
}
if (percentage != 100)
{
widthEmus = widthEmus * percentage / 100;
heightEmus = heightEmus * percentage / 100;
}
var drawing = GetDrawing(package.MainDocumentPart.GetIdOfPart(imagePart), widthEmus, heightEmus);
return(drawing);
}
