public static Bitmap RotateBitmap_NoPadding(Bitmap image, double degrees, Color?bgColor)
{
PointF[] points = new PointF[] {
new PointF(0, 0),
new PointF(image.Width, 0),
new PointF(0, image.Height),
new PointF(image.Width, image.Height),
};
double angle = PolarPoint.ToRadians(degrees);
float minX = int.MaxValue, minY = int.MaxValue, maxX = int.MinValue, maxY = int.MinValue;
for (int i = 0; i < points.Length; i++)
{
PolarPoint p = new PolarPoint(points[i]);
p.Angle += angle;
points[i] = p.ToPointF();
minX = Math.Min(minX, points[i].X);
minY = Math.Min(minY, points[i].Y);
maxX = Math.Max(maxX, points[i].X);
maxY = Math.Max(maxY, points[i].Y);
}
Size size = Size.Ceiling(new SizeF(maxX - minX, maxY - minY));
Bitmap target = new Bitmap(size.Width, size.Height);
using (Graphics g = Graphics.FromImage(target))
{
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
if (bgColor != null && bgColor != Color.Transparent)
{
using (Brush b = new SolidBrush(bgColor.Value))
g.FillRectangle(b, 0, 0, size.Width, size.Height);
}
g.TranslateTransform(-minX, -minY);
g.DrawImage(image, new PointF[] { points[0], points[1], points[2] });
}
return(target);
}
public static Bitmap RotateBitmap_NoPadding(Bitmap image, double degrees, Color? bgColor)
{
PointF[] points = new PointF[] {
new PointF(0, 0),
new PointF(image.Width, 0),
new PointF(0, image.Height),
new PointF(image.Width, image.Height),
};
double angle = PolarPoint.ToRadians(degrees);
float minX = int.MaxValue, minY = int.MaxValue, maxX = int.MinValue, maxY = int.MinValue;
for (int i = 0; i < points.Length; i++)
{
PolarPoint p = new PolarPoint(points[i]);
p.Angle += angle;
points[i] = p.ToPointF();
minX = Math.Min(minX, points[i].X);
minY = Math.Min(minY, points[i].Y);
maxX = Math.Max(maxX, points[i].X);
maxY = Math.Max(maxY, points[i].Y);
}
Size size = Size.Ceiling(new SizeF(maxX - minX, maxY - minY));
Bitmap target = new Bitmap(size.Width, size.Height);
using (Graphics g = Graphics.FromImage(target))
{
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
if (bgColor != null && bgColor != Color.Transparent)
{
using (Brush b = new SolidBrush(bgColor.Value))
g.FillRectangle(b, 0, 0, size.Width, size.Height);
}
g.TranslateTransform(-minX, -minY);
g.DrawImage(image, new PointF[] { points[0], points[1], points[2] });
}
return target;
}
