/// <summary>Returns the original (unscaled) image of the specified type.</summary>
private Image getImage(SokobanImage imageType)
{
switch (imageType)
{
case SokobanImage.Piece:
return(Properties.Resources.Skin_Piece);
case SokobanImage.PieceOnTarget:
return(Properties.Resources.Skin_PieceTarget);
case SokobanImage.PieceSelected:
return(Properties.Resources.Skin_PieceSelected);
case SokobanImage.Sokoban:
return(Properties.Resources.Skin_Sokoban);
case SokobanImage.Wall:
return(Properties.Resources.Skin_Wall);
case SokobanImage.Target:
return(Properties.Resources.Skin_Target);
case SokobanImage.TargetUnderPiece:
return(Properties.Resources.Skin_TargetUnder);
default:
throw new Exception("Unknown Sokoban image type");
}
}
/// <summary>Returns the specified image scaled for the current cell size. Images are cached for efficiency.</summary>
private Image getScaledImage(SokobanImage imageType)
{
// If we have it - return it
Size sz = new Size(CellWidth, CellHeight);
if (_cachedImage.ContainsKey(sz))
{
_cachedImageAge[sz] = DateTime.Now;
return(_cachedImage[sz][imageType]);
}
// Discard the oldest version if too many
if (_cachedImage.Count > _cachedMaxSizes)
{
KeyValuePair <Size, DateTime> last = new KeyValuePair <Size, DateTime>(new Size(), DateTime.Now);
foreach (KeyValuePair <Size, DateTime> kvp in _cachedImageAge)
{
if (kvp.Value < last.Value)
{
last = kvp;
}
}
_cachedImage.Remove(last.Key);
_cachedImageAge.Remove(last.Key);
}
// Create scaled versions
_cachedImage[sz] = new Dictionary <SokobanImage, Bitmap>();
RectangleF dest = new RectangleF(0, 0, CellWidth * 1.5f + 1f, CellHeight * 1.5f + 1f);
foreach (SokobanImage si in Enum.GetValues(typeof(SokobanImage)))
{
_cachedImage[sz][si] = new Bitmap((int)dest.Width + 1, (int)dest.Height + 1);
using (var g = Graphics.FromImage(_cachedImage[sz][si]))
{
if (si == SokobanImage.Wall)
{
g.InterpolationMode = InterpolationMode.Bicubic;
}
else
{
g.InterpolationMode = InterpolationMode.High;
}
g.DrawImage(getImage(si), dest);
}
}
// Return the requested one
_cachedImageAge[sz] = DateTime.Now;
return(_cachedImage[sz][imageType]);
}
/// <summary>
/// Draws a specified image into the specified cell.
/// </summary>
/// <param name="g">Graphics object to render onto.</param>
/// <param name="x">X co-ordinate of the cell to render into.</param>
/// <param name="y">Y co-ordinate of the cell to render into.</param>
/// <param name="imageType">Identifies the image to be drawn.</param>
public void DrawCell(Graphics g, int x, int y, SokobanImage imageType)
{
Rectangle rect = CellRect(x, y);
g.DrawImageUnscaled(getScaledImage(imageType), rect.Left, rect.Top);
}
/// <summary>Draws a specified image into the specified cell.</summary>
/// <param name="g">Graphics object to render onto.</param>
/// <param name="pos">Co-ordinates of the cell to render into.</param>
/// <param name="imageType">Identifies the image to be drawn.</param>
public void DrawCell(Graphics g, Point pos, SokobanImage imageType)
{
DrawCell(g, pos.X, pos.Y, imageType);
}
