/// <summary>
/// 当色柱长度变化时，重画色柱
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ColorBarPictureBox_Resize(object sender, EventArgs e)
{
if (ColorBarPictureBox.Width <= 0 || ColorBarPictureBox.Height <= 0)
{
return;
}
Bitmap bp = new Bitmap(ColorBarPictureBox.Width, ColorBarPictureBox.Height, PixelFormat.Format32bppArgb);
BitmapData bData = bp.LockBits(new Rectangle(0, 0, bp.Width, bp.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
Color[] colors = ColorBar.GetRGB(ColorbarSelect, bp.Width);
unsafe
{
Color c;
byte *p = (byte *)bData.Scan0;
for (int i = 0; i < bp.Width; i++)
{
c = colors[bp.Width - i - 1];
for (int j = 0; j < bp.Height; j++)
{
int offset = i * 4 + j * bData.Stride;
p[offset] = c.B;
p[offset + 1] = c.G;
p[offset + 2] = c.R;
p[offset + 3] = (byte)255;
}
}
}
bp.UnlockBits(bData);
ColorBarPictureBox.BackgroundImage = bp;
}
/// <summary>
/// 重绘频谱图
/// </summary>
/// <param name="tmppic"></param>
/// <param name="weight"></param>
private void RedrawWeight(PictureBox tmppic, double[,] weight)
{
Bitmap bp = new Bitmap(tmppic.Width, tmppic.Height, PixelFormat.Format32bppArgb);
BitmapData bData = bp.LockBits(new Rectangle(0, 0, bp.Width, bp.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
short maxcolor = 255;
Color[] colors = ColorBar.GetRGB(ColorbarSelect, maxcolor);
unsafe
{
double scalewidth = (double)(weight.GetLength(0) - 1) / (bp.Width - 1);
double tmpwidth = 0;
double scaleheight = (double)(weight.GetLength(0) - 1) / (bp.Height - 1);
double tmpheight = 0;
short weight16x = -1, weight16y = -1;
double u, v;
byte * p = (byte *)bData.Scan0;
short tmpweight;
for (int i = 0; i < bp.Width; i++)
{
tmpheight = 0;
weight16x = (short)Math.Floor(tmpwidth);
u = tmpwidth - weight16x;
for (int j = 0; j < bp.Height; j++)
{
weight16y = (short)Math.Floor(tmpheight);
v = tmpheight - weight16y;
tmpweight = (short)Math.Round((weight[weight16x, weight16y] * (1 - u) * (1 - v)
+ weight[Math.Min(weight.GetLength(0) - 1, weight16x + 1), weight16y] * u * (1 - v)
+ weight[weight16x, Math.Min(weight.GetLength(1) - 1, weight16y + 1)] * (1 - u) * v
+ weight[Math.Min(weight.GetLength(0) - 1, weight16x + 1), Math.Min(weight.GetLength(1) - 1, weight16y + 1)] * u * v) / maxweight * maxcolor);
Color c = colors[tmpweight];
int offset = i * 4 + j * bData.Stride;
p[offset] = c.B;
p[offset + 1] = c.G;
p[offset + 2] = c.R;
p[offset + 3] = (byte)255;
tmpheight += scaleheight;
}
tmpwidth += scalewidth;
}
}
bp.UnlockBits(bData);
tmppic.BackgroundImage = bp;
}