public virtual Bitmap ConvertToBitmap([NotNull] SvgImage svgImage,
[NotNull] Matrix sourceMatrix,
[NotNull] Matrix viewMatrix,
int sourceAlignmentWidth,
int sourceAlignmentHeight)
{
if (svgImage == null)
{
throw new ArgumentNullException(nameof(svgImage));
}
if (sourceMatrix == null)
{
throw new ArgumentNullException(nameof(sourceMatrix));
}
if (viewMatrix == null)
{
throw new ArgumentNullException(nameof(viewMatrix));
}
Bitmap result;
if (svgImage.GetImage() is Image image)
{
using (image)
{
var sourceRatio = (float)sourceAlignmentWidth / sourceAlignmentHeight;
var destinationRatio = (float)image.Width / image.Height;
// TODO find a good TOLERANCE
if (Math.Abs(sourceRatio - destinationRatio) < 0.5f)
{
result = new Bitmap(image,
sourceAlignmentWidth,
sourceAlignmentHeight);
}
else
{
int destinationWidth;
int destinationHeight;
if (sourceRatio < destinationRatio)
{
destinationWidth = sourceAlignmentWidth;
destinationHeight = (int)(sourceAlignmentWidth / destinationRatio);
}
else
{
destinationWidth = (int)(sourceAlignmentHeight * destinationRatio);
destinationHeight = sourceAlignmentHeight;
}
var x = (sourceAlignmentWidth - destinationWidth) / 2;
var y = (sourceAlignmentHeight - destinationHeight) / 2;
result = new Bitmap(sourceAlignmentWidth,
sourceAlignmentHeight);
using (var graphics = Graphics.FromImage(result))
{
var rect = new Rectangle(x,
y,
destinationWidth,
destinationHeight);
graphics.DrawImage(image,
rect);
}
}
var rotateFlipType = (RotateFlipType)this.GetRotationSector(sourceMatrix,
viewMatrix);
result.RotateFlip(rotateFlipType);
}
}
else
{
result = null;
}
return(result);
}
