public void Detach()
{
if (mRenderingContext != IntPtr.Zero)
{
try
{
using (ScopedLock lLock = ScopedLock.Lock(mRenderingContext))
{
if (Wgl.wglGetCurrentContext() == mRenderingContext)
{
if (!Wgl.wglMakeCurrent(IntPtr.Zero, IntPtr.Zero))
{
throw new Exception("Could not release rendering context");
}
}
lock (mRenderingContexts)
{
mRenderingContexts.Remove(mRenderingContext);
if (!Wgl.wglDeleteContext(mRenderingContext))
{
throw new Exception("Could not delete rendering context");
}
}
}
}
finally
{
try
{
if (mSurface != null)
{
mSurface.Resize -= Surface_Resize;
mSurface.ReleaseDeviceContext -= Surface_ReleaseDeviceContext;
mSurface.Paint -= Surface_Paint;
}
}
finally
{
mSurface = null;
mRenderingContext = IntPtr.Zero;
}
}
}
}
private static int LoadTexture(Bitmap xiTexture)
{
int lTextureId;
lock (mRenderingContexts)
{
if (mRenderingContexts.Count == 0)
{
throw new Exception("No rendering contexts exist");
}
Rectangle rectangle = new Rectangle(0, 0, xiTexture.Width, xiTexture.Height);
BitmapData lData = xiTexture.LockBits(
new Rectangle(0, 0, xiTexture.Width, xiTexture.Height),
ImageLockMode.ReadOnly,
PixelFormat.Format24bppRgb);
using (ScopedLock lLock = ScopedLock.Lock(mRenderingContexts[0]))
{
Gl.glGenTextures(1, out lTextureId);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, lTextureId);
Gl.glTexImage2D(
Gl.GL_TEXTURE_2D,
0,
Gl.GL_RGB8,
xiTexture.Width,
xiTexture.Height,
0,
Gl.GL_BGR,
Gl.GL_UNSIGNED_BYTE,
lData.Scan0);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_LINEAR);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_LINEAR);
}
xiTexture.UnlockBits(lData);
}
return(lTextureId);
}
protected ScopedLock LockContext()
{
ScopedLock lLock = ScopedLock.Lock(mRenderingContext);
try
{
if (Wgl.wglGetCurrentContext() != mRenderingContext)
{
if (!Wgl.wglMakeCurrent(mSurface.DeviceContext, mRenderingContext))
{
throw new Exception("Could not set the rendering context");
}
}
}
catch
{
lLock.Dispose();
throw;
}
return(lLock);
}