public Bitmap PerspectiveTransform8bit(Bitmap srcImage, PointF2D[,] points, PerspectiveTransType type)
{
Bitmap purImage = new Bitmap(srcImage.Width, srcImage.Height, PixelFormat.Format8bppIndexed);
Rectangle size = new Rectangle(0, 0, srcImage.Width, srcImage.Height);
BitmapData srcData = srcImage.LockBits(size, ImageLockMode.ReadOnly, PixelFormat.Format8bppIndexed);
BitmapData purData = purImage.LockBits(size, ImageLockMode.ReadWrite, PixelFormat.Format8bppIndexed);
unsafe
{
float[] linkPoints = new float[50];
for (int row = 0; row < 5; row++)
{
for (int col = 0; col < 10; col += 2)
{
int fixIndex = row * 10 + col;
linkPoints[fixIndex] = points[row, (col >> 1)].X == srcImage.Width + 10 ? points[row, (col >> 1)].X - 11 : points[row, (col >> 1)].X - 10;
linkPoints[fixIndex + 1] = points[row, (col >> 1)].Y == srcImage.Height + 10 ? points[row, (col >> 1)].Y - 11 : points[row, (col >> 1)].Y - 10;
}
}
IntPtr srcPtr = srcData.Scan0;
IntPtr purPtr = purData.Scan0;
ivcPerspectiveTransform8bit(srcPtr, purPtr
, srcImage.Width, srcImage.Height
, linkPoints
, (int)type);
}
purImage.Palette = _colorPalette;
srcImage.UnlockBits(srcData);
purImage.UnlockBits(purData);
return(purImage);
}
private void checkBox2_CheckedChanged(object sender, EventArgs e)
{
string type = ((CheckBox)sender).Text;
if (type == "鄰近" && ((CheckBox)sender).Checked)
{
_transType = PerspectiveTransType.TRANS_NEAREST;
checkBox3.Checked = false;
checkBox4.Checked = false;
}
else if (type == "雙線" && ((CheckBox)sender).Checked)
{
_transType = PerspectiveTransType.TRANS_LINEAR;
checkBox2.Checked = false;
checkBox3.Checked = false;
}
else if (((CheckBox)sender).Checked)
{
_transType = PerspectiveTransType.TRANS_BICUBIC;
checkBox2.Checked = false;
checkBox4.Checked = false;
}
}
