private void UpdateDisplay() // redraws the display to the screen, cannot be in GraphicsHandler due to drawing to the forms elements
{
// start timer to see how long frame takes
Stopwatch frameDrawTime = Stopwatch.StartNew();
// draws the black borders around the main window
GraphicsHandler.DrawBorder();
int[] vram = GLOBAL.VRAM.GetContents(); // gets the characters on screen
// draw each character to the screen
for (int i = 0; i < vram.Length; i++)
{
GraphicsHandler.DrawChar(i % 40, i / 40, vram[i]); // i % 40, i / 40 turns the 1D vram array to 2D co-ordinates for the GraphicsHandler object
}
// gets window size properties
int[] dimensions = GraphicsHandler.GetDimensions();
int width = dimensions[0];
int height = dimensions[1];
int borderSize = GLOBAL.AppConfig.border_size;
int displayScale = GLOBAL.AppConfig.display_scale;
// upscales the output by displayScale with nearest neighbour (for no blurring pixels)
displayPictureBox.Image = GraphicsHandler.DrawCursor(GraphicsHandler.GetDisplay(), GLOBAL.cursorPos[0], GLOBAL.cursorPos[1], cursorVisible);
Graphics graphics = Graphics.FromImage(zoomedDisplay);
graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
// draw the upscaled image to the screen
graphics.DrawImage(displayPictureBox.Image, 0, 0, (width + (borderSize * 2)) * displayScale, (height + (borderSize * 2)) * displayScale);
displayPictureBox.Image = zoomedDisplay;
// update screen and clear memory
displayPictureBox.Refresh();
graphics.Dispose();
// store how long it took to draw that drame
frameDrawTime.Stop();
lastFrameTime = frameDrawTime.Elapsed.TotalMilliseconds;
}
private void SetupEnviroment() // prepare the application before main execution
{
// reads user config file
FileHandler.ReadAppConfig();
// gets window size properties
int[] dimensions = GraphicsHandler.GetDimensions();
int width = dimensions[0];
int height = dimensions[1];
int borderSize = GLOBAL.AppConfig.border_size;
int displayScale = GLOBAL.AppConfig.display_scale;
// gets the user's display resolution
int windowWidth = Screen.FromControl(this).Bounds.Width;
int windowHeight = Screen.FromControl(this).Bounds.Height;
// gets the wanted size for the window
int newWidth = (width + (borderSize * 2)) * displayScale;
int newHeight = (height + (borderSize * 2)) * displayScale;
if (newWidth > windowWidth || newHeight > windowHeight - 50) // if resulting window would be larger than resolution, -50 height accounting for the taskbar
{
// reset the scale to the default value
ErrorHandler.ShowSystemError(6);
GLOBAL.AppConfig.display_scale = 3;
// calculate a new size
displayScale = GLOBAL.AppConfig.display_scale;
newWidth = (width + (borderSize * 2)) * displayScale;
newHeight = (height + (borderSize * 2)) * displayScale;
}
// changes GUI elements depending on the display scale value and border width
displayPictureBox.Size = new Size(newWidth, newHeight); // the area showing the main program
this.Size = new Size(newWidth + 15, newHeight + 88); // the window size. extra size accounts for window border and buttons
zoomedDisplay = new Bitmap(newWidth, newHeight); // final image the user sees
// changes button location based on display scale and border width
int newY = newHeight; // right below main program area
int newButtonWidth = newWidth / 4; // 4 buttons
// location
toggleKeyboardButton.Location = new Point(newButtonWidth * 0, newY);
toggleDebugButton.Location = new Point(newButtonWidth * 1, newY);
LoadProgramButton.Location = new Point(newButtonWidth * 2, newY);
SaveProgramButton.Location = new Point(newButtonWidth * 3, newY);
// dimensions
toggleKeyboardButton.Size = new Size(newButtonWidth, 50);
toggleDebugButton.Size = new Size(newButtonWidth, 50);
LoadProgramButton.Size = new Size(newButtonWidth, 50);
SaveProgramButton.Size = new Size(newButtonWidth, 50);
GLOBAL.C64_ROM.LoadCharsetData(); // loads character set
GLOBAL.VRAM.FillContents(0x20); // fills the vram (characters on screen) with spaces, hex 0x20
// setup display and print the default text on boot
displayPictureBox.Image = GraphicsHandler.GetDisplay();
GLOBAL.C64_ROM.ShowStartupText();
GLOBAL.cursorPos = new int[] { 0, 32 };
PrintReady(8);
GLOBAL.cursorPos = new int[] { 0, 48 };
// sets up the performance monitoring object
string currentProcessName = Process.GetCurrentProcess().ProcessName;
cpuUsage = new PerformanceCounter("Process", "% Processor Time", currentProcessName, true);
ramUsage = new PerformanceCounter("Process", "Private Bytes", currentProcessName, true);
// cursor fires CursorTick_Event three times a second
cursorTick.Interval = 333;
cursorTick.Tick += new EventHandler(CursorTick_Event);
cursorTick.Enabled = true;
}