protected void DrawBackground(Cairo.Context cr)
{
var totalRect = GetTotalBounds();
cr.SetSourceColor(BackgroundColor);
cr.Rectangle(totalRect.X, totalRect.Y, totalRect.Width, totalRect.Height);
cr.Fill();
cr.Save();
cr.Translate(XOffset, YOffset);
cr.Scale(Scale, Scale);
if (Surface != null)
{
cr.SetSource(Surface, 0, 0);
using (SurfacePattern pattern = (SurfacePattern)cr.GetSource()) {
pattern.Filter = Filter.Nearest;
}
cr.Paint();
}
else if (Image != null)
{
using (Surface source = new BitmapSurface(Image)) {
cr.SetSource(source, 0, 0);
using (SurfacePattern pattern = (SurfacePattern)cr.GetSource()) {
pattern.Filter = Filter.Nearest;
}
cr.Paint();
}
}
else
{
Cairo.Rectangle extents = cr.ClipExtents();
for (int i = 0; i < Width * Height; i++)
{
int tileX = i % Width;
int tileY = i / Width;
Cairo.Rectangle rect = GetTileRectWithPadding(tileX, tileY, scale: false, offset: false);
if (!CairoHelper.RectsOverlap(extents, rect))
{
continue;
}
cr.Save();
cr.Translate(rect.X + TilePaddingX, rect.Y + TilePaddingY);
cr.Rectangle(0, 0, TileWidth, TileHeight);
cr.Clip();
TileDrawer(i, cr);
cr.Restore();
}
}
cr.Restore(); // Undo scale, offset
}
static BitmapSurface GetBitmapSurface(Bitmap bitmap)
{
if (surfaceDict.ContainsKey(bitmap))
{
throw new Exception("Tried to lock an already locked bitmap!");
}
surfaceDict[bitmap] = new BitmapSurface(bitmap);
return(surfaceDict[bitmap]);
}
public override void Draw(Bitmap bitmap, int x, int y)
{
using (Cairo.Surface s = new BitmapSurface(bitmap)) {
cr.SetSourceSurface(s, x + xOffset, y + yOffset);
using (Cairo.SurfacePattern pattern = (Cairo.SurfacePattern)cr.GetSource()) {
pattern.Filter = Cairo.Filter.Nearest;
}
cr.Paint();
}
}
/// <summary>
/// Makes a copy of a bitmap as a Cairo.ImageSurface. No need to unlock the bitmap later.
/// I don't know why, but this seems to have caused segfaults, so don't use it I guess...
/// </summary>
public static Cairo.Surface CopyBitmap(System.Drawing.Bitmap bitmap)
{
throw new Exception("This function caused segfaults, don't use it...");
byte[] data;
using (Cairo.ImageSurface surface = new BitmapSurface(bitmap)) {
data = new byte[surface.Height * surface.Stride];
System.Runtime.InteropServices.Marshal.Copy(surface.DataPtr, data, 0, data.Length);
return(new Cairo.ImageSurface(data, surface.Format, surface.Width, surface.Height, surface.Stride));
}
}
// Overridable function which generates the image for a tile on the map.
// Child classes could choose override "TileDrawer" instead. The advantage of overriding
// this function is that the image will be cached.
protected virtual Cairo.Surface GenerateTileImage(int x, int y)
{
RoomLayout layout = GetRoomLayout(x, y);
var tileSurface = this.Window.CreateSimilarSurface(Cairo.Content.Color,
(int)(layout.Width * 16 * _scale), (int)(layout.Height * 16 * _scale));
// The below line works fine, but doesn't look as good on hidpi monitors
//_surface = new Cairo.ImageSurface(Cairo.Format.Rgb24,
// (int)(layout.Width * 16 * _scale), (int)(layout.Height * 16 * _scale));
Bitmap img = layout.GetImage();
using (var cr = new Cairo.Context(tileSurface))
using (var source = new BitmapSurface(img)) {
cr.Scale(_scale, _scale);
cr.SetSource(source, 0, 0);
cr.Paint();
}
return(tileSurface);
}
