public void Show()
{
if (RegisterClass() == 0)
{
return;
}
if (Create() == 0)
{
return;
}
GlobalOffscreenBuffer = CreateBackBuffer(WindowWidth, WindowHeight);
var sw = Stopwatch.StartNew();
var frameCount = 0;
var fps = 0.0f;
Win32.MSG Msg = new Win32.MSG();
while (IsRunning)
{
// TODO Frame Rate Limiting
while (Win32.PeekMessage(out Msg, hWnd, 0, 0, 1))
{
if (Msg.message == WM_QUIT)
{
IsRunning = false;
}
// Update Messages
{
Win32.TranslateMessage(ref Msg);
Win32.DispatchMessage(ref Msg);
}
}
// Render
{
Update();
Render(GlobalOffscreenBuffer);
// Paint
IntPtr hDC = Win32.GetDC(hWnd);
var dimensions = GetWindowDimensions(hWnd);
Win32.StretchDIBits(hDC, 0, 0, WindowWidth, WindowHeight, 0, 0, dimensions.Width, GlobalOffscreenBuffer.Height, GlobalOffscreenBuffer.Memory, ref GlobalOffscreenBuffer.Info, 0, (uint)TernaryRasterOperations.SRCCOPY);
ReleaseDC(hWnd, hDC);
}
frameCount++;
fps = frameCount / (sw.ElapsedMilliseconds * 0.001f);
// TODO Do some sleeping to maintain fps limits
SetWindowText(hWnd, "Fps:" + fps);
}
}
private static OffscreenBuffer CreateBackBuffer(int width, int height)
{
var buffer = new OffscreenBuffer();
buffer.Info.Init(); // Populates BiSize
buffer.Info.biWidth = width;
buffer.Info.biHeight = -height; // TopDown
buffer.Info.biPlanes = 1;
buffer.Info.biBitCount = 32;
buffer.Info.biCompression = BitmapCompressionMode.BI_RGB;
buffer.Info.biXPelsPerMeter = 0;
buffer.Info.biYPelsPerMeter = 0;
buffer.Info.biClrUsed = 0;
buffer.Info.biClrImportant = 0;
buffer.Width = width;
buffer.Height = height;
buffer.bpp = 4;
buffer.pitch = buffer.Width * buffer.bpp;
buffer.Memory = new byte[buffer.Width * buffer.Height * buffer.bpp];
return(buffer);
}
public virtual void Render(OffscreenBuffer buffer)
{
// Noop
}