public static TileImage[] SplitToTileImage(Image orgImage, ushort maxWidth, ushort maxHeigth)
{
List<TileImage> imgList = new List<TileImage>();
int orgWidth = orgImage.Width;
int orgHeight = orgImage.Height;
int gridWidth = (orgWidth - 1) / maxWidth + 1;
int gridHeigth = (orgHeight - 1) / maxHeigth + 1;
int minWidth = orgWidth % maxWidth;
int minHeigth = orgHeight % maxHeigth;
if (minWidth == 0) minWidth = maxWidth;
if (minHeigth == 0) minHeigth = maxHeigth;
for (int xIdx = 0; xIdx < gridWidth; xIdx++)
{
int destWidth = maxWidth;
if (xIdx == gridWidth - 1)
{
destWidth = minWidth;
}
for (int yIdx = 0; yIdx < gridHeigth; yIdx++)
{
int destHeight = maxHeigth;
if (yIdx == gridHeigth - 1)
{
destHeight = minHeigth;
}
Bitmap destImg = new Bitmap(destWidth, destHeight);
Graphics g = Graphics.FromImage(destImg);
Rectangle destRect = new Rectangle(0, 0, destWidth, destHeight);
Rectangle sourceRect = new Rectangle(xIdx * maxWidth, yIdx * maxHeigth, destWidth, destHeight);
g.DrawImage(orgImage, destRect, sourceRect, GraphicsUnit.Pixel);
TileImage tImg = new TileImage();
tImg.image = destImg;
tImg.x = xIdx * maxWidth;
tImg.y = yIdx * maxHeigth;
imgList.Add(tImg);
}
}
return imgList.ToArray();
}
