public void DrawTiles(Graphics g, Point p, Rectangle terrainRectangle, Func <Point, int> terrain)
{
// Calculate and clip screen coordinates of terrain
var sx1 = Math.Max(p.X + terrainRectangle.Left * TileSize, (int)g.ClipBounds.Left);
var sy1 = Math.Max(p.Y + terrainRectangle.Top * TileSize, (int)g.ClipBounds.Top);
var sx2 = Math.Min(p.X + terrainRectangle.Right * TileSize, (int)g.ClipBounds.Right);
var sy2 = Math.Min(p.Y + terrainRectangle.Bottom * TileSize, (int)g.ClipBounds.Bottom);
if (sx1 >= sx2 || sy1 >= sy2)
{
return;
}
// Calculate clipped terrain coordinates
var tx1 = (sx1 - p.X) / TileSize;
var ty1 = (sy1 - p.Y) / TileSize;
var tx2 = (sx2 - p.X) / TileSize;
var ty2 = (sy2 - p.Y) / TileSize;
// Prepare pixmap; pixmap covers screen coordinates (sx1,sy1) to (sx2,sy2)
if (_Pixmap == null || _Pixmap.Width != sx2 - sx1 || _Pixmap.Height != sy2 - sy1)
{
_Pixmap = new Pixmap(sx2 - sx1, sy2 - sy1);
}
// Prepare layers pixmaps
if (_PixmapsTileSize != TileSize)
{
foreach (var layer in _Layers)
{
layer.CreatePixmaps(TileSize);
}
_PixmapsTileSize = TileSize;
}
// Prepare terrain cache
int originX = tx1 - 1;
int originY = ty1 - 1;
int sizeX = tx2 - tx1 + 2 + 2;
int sizeY = ty2 - ty1 + 2 + 2;
if (_Terrain == null || _Terrain.Length != sizeX * sizeY)
{
_Terrain = new int[sizeX * sizeY];
}
for (int y = 0; y < sizeY; ++y)
{
for (int x = 0; x < sizeX; ++x)
{
_Terrain[x + y * sizeX] = terrain(new Point(x + originX, y + originY));
}
}
// Draw all layers
foreach (var layer in _Layers)
{
if (layer.Layout == LayerLayout.Corners)
{
// For all terrain locations to draw
Parallel.For(ty1, ty2 + 2, ty =>
// for (int ty = ty1; ty < ty2 + 2; ++ty)
{
for (int tx = tx1; tx < tx2 + 2; ++tx)
{
// Get pixmap position of terrain location
int px = tx * TileSize + p.X - sx1 - TileSize / 2;
int py = ty * TileSize + p.Y - sy1 - TileSize / 2;
// Get layers masks of surrounding terrain locations (corners)
int cmask1 = _Terrain[(tx - originX - 1) + (ty - originY - 1) * sizeX];
int cmask2 = _Terrain[(tx - originX) + (ty - originY - 1) * sizeX];
int cmask3 = _Terrain[(tx - originX - 1) + (ty - originY) * sizeX];
int cmask4 = _Terrain[(tx - originX) + (ty - originY) * sizeX];
// Prepare seed for selecting random variations of tiles
int seed = tx | (ty << 16);
// Draw tile
int code = 0;
if ((cmask1 & layer.ConnectionsMask) != 0)
{
code += 1;
}
if ((cmask2 & layer.ConnectionsMask) != 0)
{
code += 2;
}
if ((cmask3 & layer.ConnectionsMask) != 0)
{
code += 4;
}
if ((cmask4 & layer.ConnectionsMask) != 0)
{
code += 8;
}
if (code != 0)
{
Point coords = layer.GetTileCoords(code, seed);
var srcRect = new Rectangle(TileSize * coords.X, TileSize * coords.Y, TileSize, TileSize);
if (layer.WrapPixmap != null)
{
Pixmap.Draw2(layer.TilesPixmap, layer.WrapPixmap, _Pixmap, srcRect, new Point(tx * TileSize, ty * TileSize), new Point(px, py));
}
else
{
Pixmap.Draw(layer.TilesPixmap, _Pixmap, srcRect, px, py);
}
}
}
});
}
else
{
// For all terrain locations to draw
Parallel.For(ty1, ty2 + 1, ty =>
//for (int ty = ty1; ty < ty2 + 1; ++ty)
{
for (int tx = tx1; tx < tx2 + 1; ++tx)
{
// If location contains this layer
int mask = terrain(new Point(tx, ty));
if ((mask & layer.Mask) != 0)
{
// Get pixmap position of terrain location
int px = tx * TileSize + p.X - sx1;
int py = ty * TileSize + p.Y - sy1;
// Get layers masks of surrounding terrain locations (sides)
//int lmask = terrain(new Point(tx - 1, ty));
//int umask = terrain(new Point(tx, ty - 1));
//int rmask = terrain(new Point(tx + 1, ty));
//int dmask = terrain(new Point(tx, ty + 1));
int lmask = _Terrain[(tx - originX - 1) + (ty - originY) * sizeX];
int umask = _Terrain[(tx - originX) + (ty - originY - 1) * sizeX];
int rmask = _Terrain[(tx - originX + 1) + (ty - originY) * sizeX];
int dmask = _Terrain[(tx - originX) + (ty - originY + 1) * sizeX];
// Prepare seed for selecting random variations of tiles
int seed = tx | (ty << 16);
// Draw tile
int code = 0;
if ((lmask & layer.ConnectionsMask) != 0)
{
code += 1;
}
if ((umask & layer.ConnectionsMask) != 0)
{
code += 2;
}
if ((rmask & layer.ConnectionsMask) != 0)
{
code += 4;
}
if ((dmask & layer.ConnectionsMask) != 0)
{
code += 8;
}
Point coords = layer.GetTileCoords(code, seed);
var srcRect = new Rectangle(TileSize * coords.X, TileSize * coords.Y, TileSize, TileSize);
if (layer.WrapPixmap != null)
{
Pixmap.Draw2(layer.TilesPixmap, layer.WrapPixmap, _Pixmap, srcRect, new Point(tx * TileSize, ty * TileSize), new Point(px, py));
}
else
{
Pixmap.Draw(layer.TilesPixmap, _Pixmap, srcRect, px, py);
}
}
}
});
}
}
// Copy pixmap to graphics
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed;
g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighSpeed;
g.DrawImageUnscaled(_Pixmap.Bitmap, new Point(sx1, sy1));
}