// baselayer index = 0
private void DrawVisibleMapRectangle(ResourceClass.GWEDFile.OverlayStruct baseLayer, int tileRefIndex)
{
ushort tilePixel = 64;
if (baseImage == null)
{
baseImage = new Bitmap(baseLayer.xtile * tilePixel, baseLayer.ytile * tilePixel,
PixelFormat.Format24bppRgb);
}
baseImage = (Image)tisFile.CreateTileLayerImage((Bitmap)baseImage, baseLayer.tileMaps,
tileRefIndex, CalculateTileRect(baseLayer, tilePixel), tilePixel, currBright);
this.picAreaMap.Image = baseImage;
}
private TileRect CalculateTileRect(ResourceClass.GWEDFile.OverlayStruct baseLayer, ushort tilePixel)
{
TileRect tileRect = new TileRect();
if (ApplicationRuntime.AppParams.HighMemoryUsage)
{
tileRect.minX = 0;
tileRect.maxX = baseLayer.xtile;
tileRect.minY = 0;
tileRect.maxY = baseLayer.ytile;
}
else
{
double minX = Math.Abs(this.picAreaMap.DisplayRectangle.Left);
double maxX = minX + this.picAreaMap.ClientSize.Width;
double minY = Math.Abs(this.picAreaMap.DisplayRectangle.Top);
double maxY = minY + this.picAreaMap.ClientSize.Height;
tileRect.minX = (ushort)Math.Floor(minX / tilePixel);
tileRect.maxX = (ushort)Math.Ceiling(maxX / tilePixel);
tileRect.minY = (ushort)Math.Floor(minY / tilePixel);
tileRect.maxY = (ushort)Math.Ceiling(maxY / tilePixel);
int diff = tileRect.maxX - baseLayer.xtile;
if (diff > 0)
{
tileRect.minX = (ushort)(tileRect.minX - diff < 0 ? 0 : tileRect.minX - diff);
tileRect.maxX = baseLayer.xtile;
}
diff = tileRect.maxY - baseLayer.ytile;
if (diff > 0)
{
tileRect.minY = (ushort)(tileRect.minY - diff < 0 ? 0 : tileRect.minY - diff);
tileRect.maxY = baseLayer.ytile;
}
}
return(tileRect);
}
