internal void Cleanup(ref WriteableBitmap backbuffer)
{
if (backbuffer == null || backbuffer.Width != this.size.Width || backbuffer.Height != this.size.Height)
{
backbuffer = new WriteableBitmap(
this.size.Width,
this.size.Height,
96,
96,
PixelFormats.Pbgra32,
BitmapPalettes.WebPalette);
readBuf = new byte[this.size.Width * this.size.Height * 4];
}
GL.ReadPixels(0, 0, this.size.Width, this.size.Height, PixelFormat.Bgra, PixelType.UnsignedByte, readBuf);
// copy pixels upside down
backbuffer.Lock();
var src = new Int32Rect(0, 0, (int)backbuffer.Width, 1);
for (int y = 0; y < (int)backbuffer.Height; y++)
{
src.Y = (int)backbuffer.Height - y - 1;
backbuffer.WritePixels(src, readBuf, backbuffer.BackBufferStride, 0, y);
}
backbuffer.AddDirtyRect(new Int32Rect(0, 0, (int)backbuffer.Width, (int)backbuffer.Height));
backbuffer.Unlock();
}
private void GlControlPaint(object sender, PaintEventArgs e)
{
if (!_loaded)
{
GL.ClearColor(Color4.LightSteelBlue);
GL.Clear(ClearBufferMask.ColorBufferBit);
}
else if (!_bound)
{
GL.ClearColor(Color4.SteelBlue);
GL.Clear(ClearBufferMask.ColorBufferBit);
}
else if (_screenCap)
{
_screenCap = false;
SuspendLayout();
_graph.HideUI();
Size tmp = glControl.Size;
glControl.Size = new Size(2000, 750);
CanvasManager.ChangeViewportSize(glControl.Size);
GL.ClearColor(Color4.White);
GL.Clear(ClearBufferMask.ColorBufferBit);
_graph.DrawGraph();
Bitmap bmp = new Bitmap(glControl.Width, this.glControl.Height);
BitmapData data =
bmp.LockBits(glControl.ClientRectangle, ImageLockMode.WriteOnly,
System.Drawing.Imaging.PixelFormat.Format24bppRgb);
GL.Finish();
GL.ReadPixels(0, 0, this.glControl.Width, this.glControl.Height, PixelFormat.Bgr, PixelType.UnsignedByte, data.Scan0);
bmp.UnlockBits(data);
bmp.RotateFlip(RotateFlipType.RotateNoneFlipY);
bmp.Save(_screenCapFile, ImageFormat.Png);
glControl.Size = tmp;
CanvasManager.ChangeViewportSize(glControl.Size);
_graph.ShowUI();
ResumeLayout();
}
else
{
GL.ClearColor(Color4.White);
GL.Clear(ClearBufferMask.ColorBufferBit);
_graph.DrawGraph();
}
glControl.SwapBuffers();
}