static int Main(string[] args)
{
if (!driver.Init(WIDTH, HEIGHT))
{
Debug.Print("Failed to initialize!");
return(-1);
}
// Setup the graphics (window size, display mode, etc)
if (!driver.SetupGraphics($"assets{Path.DirectorySeparatorChar.ToString(CultureInfo.CurrentCulture)}CHIP-8.logo.bmp"))
{
Debug.Print("Failed to setup graphics!");
return(-2);
}
// Setup the input system (register input callbacks)
if (!driver.SetupInput())
{
Debug.Print("Failed to setup input!");
return(-3);
}
if (!LoadMedia())
{
Debug.Print("Failed to load media!");
return(-4);
}
//Main loop flag
var quit = false;
//Event handler
SDL.SDL_Event evt;
//Set default current surface
currentTexture = textures[(int)KeyPressSurface.Default];
Debug.Print("Loaded...");
var pixelColor = appleIIcGreen;
var backgroundColor = gray;
// Initialize the CHIP-8 system (Clear the memory, registers and screen)
myChip8 = new CPU((uint)((pixelColor.a << 24) | (pixelColor.r << 16) | (pixelColor.g << 8) | pixelColor.b),
(uint)((backgroundColor.a << 24) | (backgroundColor.r << 16) | (backgroundColor.g << 8) | backgroundColor.b));
myChip8.OnDraw += DrawGraphics;
myChip8.OnStartSound += OnStartSound;
myChip8.OnEndSound += OnEndSound;
// Load (copy) the game into the memory
myChip8.LoadGame($"progs{Path.DirectorySeparatorChar.ToString(CultureInfo.CurrentCulture)}demo.ch8");
//Rotation variables
double angle = 0;
screenCenter = new SDL.SDL_Point
{
x = WIDTH / 2,
y = HEIGHT / 2
};
//Start counting frames per second
countedFrames = 0;
fpsTimer.Start();
//While application is running
while (!quit)
{
if (!debugKeys && !debugPixels)
{
// Emulate one cycle of the system
myChip8.EmulateCycle();
}
//Handle events on queue
while (SDL.SDL_PollEvent(out evt) != 0)
{
//User requests quit
switch (evt.type)
{
case SDL.SDL_EventType.SDL_QUIT:
Debug.Print("Quitting...");
quit = true;
break;
case SDL.SDL_EventType.SDL_KEYDOWN:
//Select surfaces based on key press
switch (evt.key.keysym.sym)
{
case SDL.SDL_Keycode.SDLK_ESCAPE:
Debug.Print("ESCAPE");
Debug.Print("Quitting...");
quit = true;
break;
case SDL.SDL_Keycode.SDLK_UP:
currentTexture = textures[(int)KeyPressSurface.Up];
Debug.Print("UP");
break;
case SDL.SDL_Keycode.SDLK_DOWN:
currentTexture = textures[(int)KeyPressSurface.Down];
Debug.Print("DOWN");
break;
case SDL.SDL_Keycode.SDLK_LEFT:
currentTexture = textures[(int)KeyPressSurface.Left];
Debug.Print("LEFT");
break;
case SDL.SDL_Keycode.SDLK_RIGHT:
currentTexture = textures[(int)KeyPressSurface.Right];
Debug.Print("RIGHT");
break;
case SDL.SDL_Keycode.SDLK_1:
keys[0x0] = 1;
Debug.Print("1");
break;
case SDL.SDL_Keycode.SDLK_2:
keys[0x1] = 1;
Debug.Print("2");
break;
case SDL.SDL_Keycode.SDLK_3:
keys[0x2] = 1;
Debug.Print("3");
break;
case SDL.SDL_Keycode.SDLK_4:
keys[0x3] = 1;
Debug.Print("4");
break;
case SDL.SDL_Keycode.SDLK_q:
keys[0x4] = 1;
Debug.Print("q");
break;
case SDL.SDL_Keycode.SDLK_w:
keys[0x5] = 1;
Debug.Print("w");
break;
case SDL.SDL_Keycode.SDLK_e:
keys[0x6] = 1;
Debug.Print("e");
break;
case SDL.SDL_Keycode.SDLK_r:
keys[0x7] = 1;
Debug.Print("r");
break;
case SDL.SDL_Keycode.SDLK_a:
keys[0x8] = 1;
Debug.Print("a");
break;
case SDL.SDL_Keycode.SDLK_s:
keys[0x9] = 1;
Debug.Print("s");
break;
case SDL.SDL_Keycode.SDLK_d:
keys[0xA] = 1;
Debug.Print("d");
break;
case SDL.SDL_Keycode.SDLK_f:
keys[0xA] = 1;
Debug.Print("f");
break;
case SDL.SDL_Keycode.SDLK_z:
keys[0xB] = 1;
Debug.Print("z");
break;
case SDL.SDL_Keycode.SDLK_y:
keys[0xB] = 1;
Debug.Print("y");
break;
case SDL.SDL_Keycode.SDLK_x:
keys[0xC] = 1;
Debug.Print("x");
break;
case SDL.SDL_Keycode.SDLK_c:
keys[0xD] = 1;
Debug.Print("c");
break;
case SDL.SDL_Keycode.SDLK_v:
keys[0xE] = 1;
Debug.Print("v");
break;
case SDL.SDL_Keycode.SDLK_BACKSPACE:
debugKeys = false;
debugPixels = !debugPixels;
if (debugPixels)
{
Debug.Print("Entering debug pixel mode");
}
else
{
Debug.Print("Leaving debug pixel mode");
}
break;
case SDL.SDL_Keycode.SDLK_RETURN:
debugKeys = !debugKeys;
debugPixels = false;
if (debugKeys)
{
Debug.Print("Entering debug keys mode");
}
else
{
Debug.Print("Leaving debug keys mode");
}
break;
case SDL.SDL_Keycode.SDLK_PLUS:
zoom += 0.5f;
Debug.Print($"Zoom level: {zoom.ToString(NumberFormatInfo.CurrentInfo)}x");
break;
case SDL.SDL_Keycode.SDLK_MINUS:
zoom -= 0.5f;
Debug.Print($"Zoom level: {zoom.ToString(NumberFormatInfo.CurrentInfo)}x");
break;
case SDL.SDL_Keycode.SDLK_0:
zoom = 1.0f;
Debug.Print($"Zoom level: {zoom.ToString(NumberFormatInfo.CurrentInfo)}x");
break;
default:
currentTexture = textures[(int)KeyPressSurface.Default];
Debug.Print("Default Key Press");
break;
}
break;
case SDL.SDL_EventType.SDL_KEYUP:
//Select surfaces based on key press
switch (evt.key.keysym.sym)
{
case SDL.SDL_Keycode.SDLK_UP:
currentTexture = textures[(int)KeyPressSurface.Default];
break;
case SDL.SDL_Keycode.SDLK_DOWN:
currentTexture = textures[(int)KeyPressSurface.Default];
break;
case SDL.SDL_Keycode.SDLK_LEFT:
currentTexture = textures[(int)KeyPressSurface.Default];
break;
case SDL.SDL_Keycode.SDLK_RIGHT:
currentTexture = textures[(int)KeyPressSurface.Default];
break;
case SDL.SDL_Keycode.SDLK_1:
keys[0x0] = 0;
Debug.Print("1");
break;
case SDL.SDL_Keycode.SDLK_2:
keys[0x1] = 0;
Debug.Print("2");
break;
case SDL.SDL_Keycode.SDLK_3:
keys[0x2] = 0;
Debug.Print("3");
break;
case SDL.SDL_Keycode.SDLK_4:
keys[0x3] = 0;
Debug.Print("4");
break;
case SDL.SDL_Keycode.SDLK_q:
keys[0x4] = 0;
Debug.Print("q");
break;
case SDL.SDL_Keycode.SDLK_w:
keys[0x5] = 0;
Debug.Print("w");
break;
case SDL.SDL_Keycode.SDLK_e:
keys[0x6] = 0;
Debug.Print("e");
break;
case SDL.SDL_Keycode.SDLK_r:
keys[0x7] = 0;
Debug.Print("r");
break;
case SDL.SDL_Keycode.SDLK_a:
keys[0x8] = 0;
Debug.Print("a");
break;
case SDL.SDL_Keycode.SDLK_s:
keys[0x9] = 0;
Debug.Print("s");
break;
case SDL.SDL_Keycode.SDLK_d:
keys[0xA] = 0;
Debug.Print("d");
break;
case SDL.SDL_Keycode.SDLK_f:
keys[0xA] = 0;
Debug.Print("f");
break;
case SDL.SDL_Keycode.SDLK_z:
keys[0xB] = 0;
break;
case SDL.SDL_Keycode.SDLK_y:
keys[0xB] = 0;
break;
case SDL.SDL_Keycode.SDLK_x:
keys[0xC] = 0;
break;
case SDL.SDL_Keycode.SDLK_c:
keys[0xD] = 0;
break;
case SDL.SDL_Keycode.SDLK_v:
keys[0xE] = 0;
break;
default:
currentTexture = textures[(int)KeyPressSurface.Default];
break;
}
break;
}
}
if (debugKeys)
{
if (!SDLDriver.Render(currentTexture))
{
Debug.Print("Failed to render texture!");
}
}
if (debugPixels)
{
angle = RotateRectangle(angle);
}
// Store key press state (Press and Release)
// If we press or release a key, we should store this state in the part that emulates the keypad
myChip8.SetKeys(keys);
// 60 Hz = 1000 ms /60 = 16.666 ms => approx. 17 ms (17 ms * 60 = 1020 ms)
//SDL.SDL_Delay(17);
//Calculate and correct fps
var avgFPS = countedFrames / (fpsTimer.Ticks / 1000.0);
// It is possible for there to be a very small amount of time passed
// for the first frame and have it give us a really high fps.
// This is why we correct the value if it is really high.
if (avgFPS > 2000000)
{
avgFPS = 0;
}
//Set text to be rendered
timerText = $"Average {avgFPS.ToString("F2", NumberFormatInfo.CurrentInfo)} Frames Per Second";
var color = white;
if (debugKeys)
{
color = black;
}
if (debugPixels)
{
color = green1;
}
//Render text
if (!fpsTextTexture.LoadFromRenderedText(timerText, color))
{
Debug.Print("Unable to render FPS texture!");
}
//Clear screen
//SDL.SDL_SetRenderDrawColor(driver.rendererPtr, 0xFF, 0xFF, 0xFF, 0xFF);
//SDL.SDL_RenderClear(driver.rendererPtr);
//Render textures
fpsTextTexture.Render((WIDTH - fpsTextTexture.Width) / 2, (HEIGHT - (int)(fpsTextTexture.Height * 1.75)));
//Update screen
if (!driver.Present())
{
Debug.Print("Failed to present render!");
}
++countedFrames;
}
return(0);
}
private void MainForm_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Escape:
Debug.Print("ESCAPE");
Debug.Print("Quitting...");
quit = true;
Close();
break;
case Keys.Up:
Debug.Print("UP");
break;
case Keys.Down:
Debug.Print("DOWN");
break;
case Keys.Left:
Debug.Print("LEFT");
break;
case Keys.Right:
Debug.Print("RIGHT");
break;
case Keys.D1:
keys[0x0] = 1;
Debug.Print("1");
break;
case Keys.D2:
keys[0x1] = 1;
Debug.Print("2");
break;
case Keys.D3:
keys[0x2] = 1;
Debug.Print("3");
break;
case Keys.D4:
keys[0x3] = 1;
Debug.Print("4");
break;
case Keys.Q:
keys[0x4] = 1;
Debug.Print("q");
break;
case Keys.W:
keys[0x5] = 1;
Debug.Print("w");
break;
case Keys.E:
keys[0x6] = 1;
Debug.Print("e");
break;
case Keys.R:
keys[0x7] = 1;
Debug.Print("r");
break;
case Keys.A:
keys[0x8] = 1;
Debug.Print("a");
break;
case Keys.S:
keys[0x9] = 1;
Debug.Print("s");
break;
case Keys.D:
keys[0xA] = 1;
Debug.Print("d");
break;
case Keys.F:
keys[0xA] = 1;
Debug.Print("f");
break;
case Keys.Z:
keys[0xB] = 1;
Debug.Print("z");
break;
case Keys.Y:
keys[0xB] = 1;
Debug.Print("y");
break;
case Keys.X:
keys[0xC] = 1;
Debug.Print("x");
break;
case Keys.C:
keys[0xD] = 1;
Debug.Print("c");
break;
case Keys.V:
keys[0xE] = 1;
Debug.Print("v");
break;
case Keys.Back:
debugKeys = false;
debugPixels = !debugPixels;
if (debugPixels)
{
Debug.Print("Entering debug pixel mode");
}
else
{
Debug.Print("Leaving debug pixel mode");
}
break;
case Keys.Enter:
debugKeys = !debugKeys;
debugPixels = false;
if (debugKeys)
{
Debug.Print("Entering debug keys mode");
}
else
{
Debug.Print("Leaving debug keys mode");
}
break;
case Keys.Oemplus:
case Keys.Add:
zoom += 0.5f;
Debug.Print($"Zoom level: {zoom.ToString(NumberFormatInfo.CurrentInfo)}x");
break;
case Keys.OemMinus:
case Keys.Subtract:
zoom -= 0.5f;
Debug.Print($"Zoom level: {zoom.ToString(NumberFormatInfo.CurrentInfo)}x");
break;
case Keys.D0:
zoom = 1.0f;
Debug.Print($"Zoom level: {zoom.ToString(NumberFormatInfo.CurrentInfo)}x");
break;
default:
Debug.Print("Default Key Press");
break;
}
myChip8.SetKeys(keys);
e.Handled = true;
}
private void OnKeyUp(object sender, KeyEventArgs e)
{
switch (e.Key)
{
case Key.Up:
break;
case Key.Down:
break;
case Key.Left:
break;
case Key.Right:
break;
case Key.D1:
keys[0x0] = 0;
Debug.Print("1");
break;
case Key.D2:
keys[0x1] = 0;
Debug.Print("2");
break;
case Key.D3:
keys[0x2] = 0;
Debug.Print("3");
break;
case Key.D4:
keys[0x3] = 0;
Debug.Print("4");
break;
case Key.Q:
keys[0x4] = 0;
Debug.Print("q");
break;
case Key.W:
keys[0x5] = 0;
Debug.Print("w");
break;
case Key.E:
keys[0x6] = 0;
Debug.Print("e");
break;
case Key.R:
keys[0x7] = 0;
Debug.Print("r");
break;
case Key.A:
keys[0x8] = 0;
Debug.Print("a");
break;
case Key.S:
keys[0x9] = 0;
Debug.Print("s");
break;
case Key.D:
keys[0xA] = 0;
Debug.Print("d");
break;
case Key.F:
keys[0xA] = 0;
Debug.Print("f");
break;
case Key.Z:
keys[0xB] = 0;
Debug.Print("z");
break;
case Key.Y:
keys[0xB] = 0;
Debug.Print("y");
break;
case Key.X:
keys[0xC] = 0;
Debug.Print("x");
break;
case Key.C:
keys[0xD] = 0;
Debug.Print("c");
break;
case Key.V:
keys[0xE] = 0;
Debug.Print("v");
break;
default:
break;
}
myChip8.SetKeys(keys);
e.Handled = true;
}
