protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
e.Graphics.Clear(BackColor);
Rectangle clip = e.ClipRectangle;
clip.Offset(-AutoScrollPosition.X, -AutoScrollPosition.Y);
e.Graphics.TranslateTransform(AutoScrollPosition.X, AutoScrollPosition.Y);
int columns = (int)((AutoScrollMinSize.Width - (2 * ElementPadding)) / ItemWidth);
int rows = (Elements.Length + columns - 1) / columns;
int firstRow = (int)Math.Max(clip.Top / ItemHeight, 0);
int lastRow = (int)Math.Min((clip.Bottom - 1 - (2 * ElementPadding)) / ItemHeight, rows - 1);
int firstColumn = (int)Math.Max(clip.Left / ItemWidth, 0);
int lastColumn = (int)Math.Min((clip.Right - 1 - (2 * ElementPadding)) / ItemWidth, columns - 1);
if (Palette != null)
{
bool swapAxes = (Rotate & 1U) != 0U;
bool reverseX = FlipX != (((Rotate + 1U) & 2U) != 0U);
bool reverseY = FlipY != ((Rotate & 2U) != 0U);
int[,] transform = new int[, ] {
{ swapAxes ? 0 : 1, swapAxes ? 1 : 0, 0 }, { swapAxes ? 1 : 0, swapAxes ? 0 : 1, 0 }, { 0, 0, 1 }
};
if (reverseX)
{
transform[0, 0] = -transform[0, 0];
transform[0, 1] = -transform[0, 1];
}
if (reverseY)
{
transform[1, 0] = -transform[1, 0];
transform[1, 1] = -transform[1, 1];
}
transform[0, 0] *= (int)ScaleX;
transform[0, 1] *= (int)ScaleX;
transform[1, 0] *= (int)ScaleY;
transform[1, 1] *= (int)ScaleY;
transform[1, 2] = (int)((ItemHeight * firstRow) + (2 * ElementPadding) + (reverseY ? (((swapAxes ? ElementWidth : ElementHeight) * ScaleY) - 1) : 0));
for (int row = firstRow; row <= lastRow; row++, transform[1, 2] += (int)ItemHeight)
{
transform[0, 2] = (int)((ItemWidth * firstColumn) + (2 * ElementPadding) + (reverseX ? (((swapAxes ? ElementHeight : ElementWidth) * ScaleX) - 1) : 0));
for (int column = firstColumn; (column <= lastColumn) && (((row * columns) + column) < Elements.Length); column++, transform[0, 2] += (int)ItemWidth)
{
GfxElement element = Elements[(row * columns) + column];
if (element != null)
{
element.Draw(e.Graphics, Palette, transform);
}
}
}
}
}
public void DrawExportTileset(Graphics graphics, long ElementsCount, long RowCount, long ColumnCount)
{
if (Palette == null)
{
throw new Exception("Cannot export with null palette.");
}
else
{
int rows = (int)RowCount;
int columns = (int)ColumnCount;
bool swapAxes = (Rotate & 1U) != 0U;
bool reverseX = FlipX != (((Rotate + 1U) & 2U) != 0U);
bool reverseY = FlipY != ((Rotate & 2U) != 0U);
int[,] transform = new int[, ] {
{ swapAxes ? 0 : 1, swapAxes ? 1 : 0, 0 }, { swapAxes ? 1 : 0, swapAxes ? 0 : 1, 0 }, { 0, 0, 1 }
};
if (reverseX)
{
transform[0, 0] = -transform[0, 0];
transform[0, 1] = -transform[0, 1];
}
if (reverseY)
{
transform[1, 0] = -transform[1, 0];
transform[1, 1] = -transform[1, 1];
}
transform[1, 2] = (int)(reverseY ? (swapAxes ? ElementWidth : ElementHeight) : 0);
for (int row = 0; row <= rows; row++, transform[1, 2] += (swapAxes ? (int)ElementWidth : (int)ElementHeight))
{
transform[0, 2] = (int)((ElementWidth * 0) + (reverseX ? (swapAxes ? ElementHeight : ElementWidth) : 0));
for (int column = 0; (column <= columns) && (((row * columns) + column) < Elements.Length); column++, transform[0, 2] += (swapAxes ? (int)ElementHeight : (int)ElementWidth))
{
GfxElement element = Elements[(row * columns) + column];
if (element != null)
{
element.Draw(graphics, Palette, transform);
}
}
}
}
}
