/// <summary>
/// Creates a scaled version of a <see cref="System.Drawing.Image"/>.
/// </summary>
/// <param name="original">The original <see cref="System.Drawing.Image"/>.</param>
/// <param name="destWidth">The target width.</param>
/// <param name="destHeight">The target height.</param>
/// <param name="keepAspectRatio">If true, the image will maintain the aspect ratio.</param>
/// <param name="bgColor">The background color of the new image.</param>
/// <param name="transparentColor">The color to make transparent in the new image.</param>
/// <returns>
/// A <see cref="Bitmap"/> resized to the given values.
/// </returns>
public static Bitmap CreateScaled(this System.Drawing.Image original, int destWidth, int destHeight, bool keepAspectRatio,
Color?bgColor, Color?transparentColor)
{
var srcRect = new Rectangle(0, 0, original.Width, original.Height);
return(CreateScaled(original, srcRect, destWidth, destHeight, keepAspectRatio, bgColor, transparentColor));
}
/// <summary>
/// Creates a <see cref="SFML.Graphics.Image"/> from a <see cref="System.Drawing.Image"/>.
/// </summary>
/// <param name="img">The <see cref="System.Drawing.Image"/>.</param>
/// <returns>The <see cref="SFML.Graphics.Image"/>.</returns>
public static Image ToSFMLImage(this System.Drawing.Image img)
{
using (var ms = new MemoryStream((img.Width * img.Height * 4) + 64))
{
img.Save(ms, ImageFormat.Bmp);
return(new Image(ms));
}
}
/// <summary>
/// Creates a scaled version of a <see cref="System.Drawing.Image"/>.
/// </summary>
/// <param name="original">The original <see cref="System.Drawing.Image"/>.</param>
/// <param name="srcRect">The source image rectangle.</param>
/// <param name="destWidth">The target width.</param>
/// <param name="destHeight">The target height.</param>
/// <param name="keepAspectRatio">If true, the image will maintain the aspect ratio.</param>
/// <param name="bgColor">The background color of the new image.</param>
/// <param name="transparentColor">The color to make transparent in the new image.</param>
/// <returns>
/// A <see cref="Bitmap"/> resized to the given values.
/// </returns>
public static Bitmap CreateScaled(this System.Drawing.Image original, Rectangle srcRect, int destWidth, int destHeight,
bool keepAspectRatio, Color?bgColor, Color?transparentColor)
{
int w;
int h;
if (keepAspectRatio)
{
// Get the destination size, maintaining aspect ratio
var aspectRatio = (float)original.Width / original.Height;
if (aspectRatio > 1)
{
w = destWidth;
h = (int)(destHeight * (1f / aspectRatio));
if (h <= 4 && destHeight >= 4)
{
h = 4;
}
}
else
{
w = (int)(destWidth * aspectRatio);
h = destHeight;
if (w <= 4 && destWidth >= 4)
{
w = 4;
}
}
}
else
{
// Don't maintain aspect ratio
w = destWidth;
h = destHeight;
}
Debug.Assert(w <= destWidth);
Debug.Assert(h <= destHeight);
// Center
var x = (int)((destWidth - w) / 2f);
var y = (int)((destHeight - h) / 2f);
// Create the new bitmap to return
var ret = new Bitmap(destWidth, destHeight);
using (var g = System.Drawing.Graphics.FromImage(ret))
{
g.PixelOffsetMode = _defaultPixelOffsetMode;
g.CompositingQuality = _defaultCompositingQuality;
g.InterpolationMode = _defaultInterpolationMode;
g.SmoothingMode = _defaultSmoothingMode;
if (bgColor.HasValue)
{
g.Clear(bgColor.Value);
}
var destRect = new Rectangle(x, y, w, h);
g.DrawImage(original, destRect, srcRect, GraphicsUnit.Pixel);
}
if (transparentColor.HasValue)
{
ret.MakeTransparent(transparentColor.Value);
}
Debug.Assert(ret.Width == destWidth);
Debug.Assert(ret.Height == destHeight);
return(ret);
}
