/// <summary>
/// Update the splash screen.
/// </summary>
public void UpdateSplash()
{
// Calculate the upper-left corner of the splash screen image
int x = (graphics.ScreenWidth - splash.Width) >> 1;
int y = (graphics.ScreenHeight - splash.Height) >> 1;
// The source region is the entire image
src.X = 0;
src.Y = 0;
src.Width = splash.Width;
src.Height = splash.Height;
// Draw the splash screen
graphics.DrawBitmap(x, y, src, splash);
// Flip the back buffers
graphics.Flip();
// Store the tick at which this frame started
Timer.Stopwatch sw = new Timer.Stopwatch();
Int64 startTick = sw.CurrentTick();
// Draw the splash screen
graphics.DrawBitmap(x, y, src, splash);
// Draw a "Loading" message as this might take a while
graphics.DrawText(graphics.ScreenWidth >> 1,
graphics.ScreenHeight - 50,
"Loading...",
Color.White, ui.Font, FontDrawOptions.DrawTextCenter);
// Flip the back buffers
graphics.Flip();
if (!introLoaded)
{
LoadIntro();
}
// delay if the splash screen hasn't been up long enough
while (sw.DeltaTimeMilliseconds(sw.CurrentTick(), startTick)
< TotalSplashTime * 1000.0F)
{
Thread.Sleep(0);
}
mode = ModeSwitch.UpdateIntro;
}
/// <summary>
/// Start the game. This method loads the game resources and
/// runs the main game loop.
/// </summary>
public void Run()
{
// Load and validate the splash screen
splash = graphics.CreateBitmap(GetFullPath(@"Data\Splash\splash.bmp"), false);
Debug.Assert(splash != null,
"GameMain.Run: Failed to initialized splash screen");
Debug.Assert(splash.Width <= graphics.ScreenWidth &&
splash.Height <= graphics.ScreenHeight,
"GameMain.Run: Splash screen has invalid dimensions");
// Load the game ui now because it has font information that is
// needed for drawing the 'Loading...' tag
DataSet dsUI = new DataSet();
Debug.Assert(dsUI != null,
"GameMain.LoadLevel: Failed to initialize UI DataSet");
dsUI.Locale = CultureInfo.InvariantCulture;
// Load the ui xml file
dsUI.ReadXml(GetFullPath(@"Data\UI\ui.xml"));
// Load the resources specified in the xml file
ui = new UserInterface(dsUI, graphics, level);
Debug.Assert(ui != null,
"GameMain.LoadLevel: Failed to initialize UI");
// Set the current update method as the splash screen updater
update = new UpdateDelegate(UpdateSplash);
// Loop until the game is done
while (!done)
{
// Switch the update delegate if a switch was requested.
switch (mode)
{
case ModeSwitch.UpdateLevel:
gi.ClearKeyPresses();
update = new UpdateDelegate(UpdateLevel);
numFrames = 0;
secondsElapsedForCurrentFrames = 0;
break;
case ModeSwitch.UpdateCountdown:
intro.Dispose();
intro = null;
level.Update(gi);
update = new UpdateDelegate(UpdateCountdown);
break;
case ModeSwitch.UpdateIntro:
LoadLevel();
update = new UpdateDelegate(UpdateIntro);
splash.Dispose();
splash = null;
break;
}
mode = ModeSwitch.None;
// Store the tick at which this frame started
Int64 startTick = sw.CurrentTick();
// Check if the user pressed the exit key
if (gi.KeyPressed((int)gi.HardwareKeys[Player.ButtonMap()[
(int)Player.Buttons.Quit]]))
{
done = true;
}
else if (levelLoaded && (level.Done || gi.KeyPressed(
(int)gi.HardwareKeys[Player.ButtonMap()[
(int)Player.Buttons.ResetLevel]])))
{
Reset();
Application.DoEvents();
continue;
}
// Update the game
update();
// Check for pending events from the OS
Application.DoEvents();
// Lock the framerate...
Int64 deltaMS = sw.DeltaTimeMilliseconds(sw.CurrentTick(), startTick);
Int64 minMS = (Int64)(1000.0F * MinSecondsPerFrame);
Int64 maxMS = (Int64)(1000.0F * MaxSecondsPerFrame);
// Check if the frame time was fast enough
if (deltaMS <= minMS)
{
// Loop until the frame time is met
do
{
if (gi.KeyPressed((int)gi.HardwareKeys[
Player.ButtonMap()[(int)Player.Buttons.Quit]]))
{
done = true;
break;
}
// Thread.Sleep(0);
Application.DoEvents();
deltaMS = sw.DeltaTimeMilliseconds(sw.CurrentTick(),
startTick);
} while (deltaMS < minMS);
}
// Increment the number of frames
numFrames++;
// Increment the overall time for these frames
if (deltaMS < maxMS)
{
secondsElapsedForCurrentFrames += deltaMS / 1000.0F;
}
else
{
secondsElapsedForCurrentFrames += maxMS / 1000.0F;
}
// Make sure enough time has elapsed since the last check
if (level != null && secondsElapsedForCurrentFrames >
level.FrameRateCheckRate)
{
currentSecondsPerFrame =
secondsElapsedForCurrentFrames / numFrames;
numFrames = 0;
secondsElapsedForCurrentFrames = 0;
}
}
}
