private static string GetErrorMessage(int errorCode)
{
StringBuilder sb = new StringBuilder(errorMessagLength);
ScreenshotInterop.SSFormatError(errorCode, sb);
return(sb.ToString());
}
public void Close()
{
if (this.IsOpened)
{
int hr = ScreenshotInterop.SSClose(this.pScreenshot);
this.pScreenshot = IntPtr.Zero;
}
}
public void Open(Bitmap bitmap)
{
this.Close();
Size size = bitmap.Size;
int bpp = Bitmap.GetPixelFormatSize(bitmap.PixelFormat);
int hr = ScreenshotInterop.SSOpen(size.Width, size.Height, bpp, ref this.pScreenshot);
if (hr != 0)
{
throw new ScreenException(hr,
string.Format("SSOpen failed: {0} (error code = 0x{1:X8}).", GetErrorMessage(hr), hr));
}
}
public void Render(RenderingContext context)
{
if (!this.IsOpened)
{
throw new InvalidOperationException();
}
Bitmap bitmap = context.Bitmap;
Rectangle rectangle = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
Rectangle trackBounds = context.Bounds;
BitmapData bitmapData = bitmap.LockBits(rectangle, ImageLockMode.WriteOnly, bitmap.PixelFormat);
try {
int hr = ScreenshotInterop.SSTake(this.pScreenshot, trackBounds.X, trackBounds.Y, bitmapData.Scan0);
if (hr != 0)
{
throw new ScreenException(hr, string.Format("Screenshot.Take failed: {0} (error code = 0x{1:X8}).",
GetErrorMessage(hr), hr));
}
}
finally {
bitmap.UnlockBits(bitmapData);
}
}
public void Render(RenderingContext context)
{
Bitmap bitmap = context.Bitmap;
Rectangle bounds = context.Bounds;
if (this.highlight)
{
// Render highlight
Point position = this.cursorPos;
Point location = bounds.Location;
position.Offset(-location.X, -location.Y);
Rectangle highlightBounds = new Rectangle(
position.X - this.radious,
position.Y - this.radious,
this.radious * 2,
this.radious * 2
);
Color transparentColor = Color.FromArgb(highlightAlpha, this.color.R, this.color.G, this.color.B);
using (SolidBrush brush = new SolidBrush(transparentColor)) {
context.Graphics.FillEllipse(brush, highlightBounds);
}
}
// Render cursor
Rectangle rectangle = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
BitmapData bitmapData = bitmap.LockBits(rectangle, ImageLockMode.ReadWrite, bitmap.PixelFormat);
try {
int bpp = Bitmap.GetPixelFormatSize(bitmap.PixelFormat);
int hr = ScreenshotInterop.SSDrawCursor(bitmapData.Scan0, this.cursorPos.X, this.cursorPos.Y, bounds.X,
bounds.Y, bitmap.Width, bitmap.Height, bpp);
// CHECK hr?
}
finally {
bitmap.UnlockBits(bitmapData);
}
}
