mirror of
https://github.com/livingcomputermuseum/ContrAlto.git
synced 2026-02-16 04:33:31 +00:00
715 lines
23 KiB
C#
715 lines
23 KiB
C#
using Contralto.CPU;
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using Contralto.Display;
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using Contralto.IO;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace Contralto
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{
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public partial class AltoWindow : Form, IAltoDisplay
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{
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public AltoWindow()
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{
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InitializeComponent();
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InitKeymap();
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_mouseCaptured = false;
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_currentCursorState = true;
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_displayBuffer = new Bitmap(608, 808, PixelFormat.Format1bppIndexed);
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DisplayBox.Image = _displayBuffer;
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ReleaseMouse();
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SystemStatusLabel.Text = _systemStoppedText;
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DiskStatusLabel.Text = String.Empty;
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}
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public void AttachSystem(AltoSystem system)
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{
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_system = system;
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_system.AttachDisplay(this);
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_controller = new ExecutionController(_system);
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_controller.ErrorCallback += OnExecutionError;
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// Update disk image UI info
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Drive0ImageName.Text = _system.DiskController.Drives[0].IsLoaded ? System.IO.Path.GetFileName(_system.DiskController.Drives[0].Pack.PackName) : _noImageLoadedText;
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Drive1ImageName.Text = _system.DiskController.Drives[1].IsLoaded ? System.IO.Path.GetFileName(_system.DiskController.Drives[1].Pack.PackName) : _noImageLoadedText;
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}
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/// <summary>
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/// Handler for "System->Start" menu. Start the Alto system running.
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="e"></param>
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private void OnSystemStartMenuClick(object sender, EventArgs e)
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{
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// Disable "Start" menu item
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SystemStartMenuItem.Enabled = false;
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// Enable "Reset" menu item
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SystemResetMenuItem.Enabled = true;
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_controller.StartExecution();
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SystemStatusLabel.Text = _systemRunningText;
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}
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private void OnSystemResetMenuClick(object sender, EventArgs e)
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{
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_controller.Reset();
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}
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private void OnSystemDrive0LoadClick(object sender, EventArgs e)
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{
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string path = ShowImageLoadDialog(0);
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if (String.IsNullOrEmpty(path))
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{
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return;
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}
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try
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{
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// Commit loaded pack back to disk
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CommitDiskPack(0);
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_system.LoadDrive(0, path);
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Drive0ImageName.Text = System.IO.Path.GetFileName(path);
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}
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catch(Exception ex)
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{
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MessageBox.Show(
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String.Format("An error occurred while loading image: {0}", ex.Message),
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"Image load error", MessageBoxButtons.OK);
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}
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}
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private void OnSystemDrive0UnloadClick(object sender, EventArgs e)
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{
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CommitDiskPack(0);
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_system.UnloadDrive(0);
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Drive0ImageName.Text = _noImageLoadedText;
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}
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private void OnSystemDrive1LoadClick(object sender, EventArgs e)
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{
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string path = ShowImageLoadDialog(1);
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if (String.IsNullOrEmpty(path))
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{
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return;
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}
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try
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{
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// Commit loaded pack back to disk
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CommitDiskPack(1);
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_system.LoadDrive(1, path);
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Drive1ImageName.Text = System.IO.Path.GetFileName(path);
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}
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catch (Exception ex)
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{
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MessageBox.Show(
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String.Format("An error occurred while loading image: {0}", ex.Message),
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"Image load error", MessageBoxButtons.OK);
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}
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}
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private void OnSystemDrive1UnloadClick(object sender, EventArgs e)
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{
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CommitDiskPack(1);
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_system.UnloadDrive(1);
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Drive1ImageName.Text = _noImageLoadedText;
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}
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private void OnHelpAboutClick(object sender, EventArgs e)
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{
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AboutBox about = new AboutBox();
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about.ShowDialog();
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}
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private void OnDebuggerShowClick(object sender, EventArgs e)
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{
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if (_debugger == null)
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{
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_debugger = new Debugger(_system, _controller);
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_debugger.LoadSourceCode(MicrocodeBank.ROM0, "Disassembly\\altoIIcode3.mu");
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_debugger.LoadSourceCode(MicrocodeBank.ROM1, "Disassembly\\MesaROM.mu");
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_debugger.FormClosed += OnDebuggerClosed;
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_debugger.Show();
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// Disable the Start/Reset menu items
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// (debugger will control those now)
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SystemStartMenuItem.Enabled = false;
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SystemResetMenuItem.Enabled = false;
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}
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else
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{
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// Debugger is already opened, just bring it to the front
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_debugger.BringToFront();
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}
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}
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private void OnDebuggerClosed(object sender, FormClosedEventArgs e)
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{
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// Re-enable start/reset menu items depending on current execution state.
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SystemStartMenuItem.Enabled = !_controller.IsRunning;
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SystemResetMenuItem.Enabled = _controller.IsRunning;
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_debugger = null;
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}
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private void OnFileExitClick(object sender, EventArgs e)
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{
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_controller.StopExecution();
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this.Close();
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}
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private void OnAltoWindowClosed(object sender, FormClosedEventArgs e)
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{
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// Commit loaded packs back to disk
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CommitDiskPack(0);
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CommitDiskPack(1);
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}
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private string ShowImageLoadDialog(int drive)
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{
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OpenFileDialog fileDialog = new OpenFileDialog();
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fileDialog.DefaultExt = "dsk";
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fileDialog.Filter = "Raw Alto Disk Images (*.dsk)|*.dsk|All Files (*.*)|*.*";
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fileDialog.Multiselect = false;
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fileDialog.Title = String.Format("Select image to load into drive {0}", drive);
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DialogResult res = fileDialog.ShowDialog();
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if (res == DialogResult.OK)
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{
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return fileDialog.FileName;
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}
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else
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{
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return null;
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}
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}
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/// <summary>
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/// Error handling
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/// </summary>
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/// <param name="e"></param>
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private void OnExecutionError(Exception e)
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{
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// TODO: invoke the debugger when an error is hit
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//OnDebuggerShowClick(null, null);
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SystemStatusLabel.Text = _systemErrorText;
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}
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//
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// Disk handling
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//
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private void CommitDiskPack(int driveId)
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{
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DiabloDrive drive = _system.DiskController.Drives[driveId];
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if (drive.IsLoaded)
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{
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using (FileStream fs = new FileStream(drive.Pack.PackName, FileMode.Create, FileAccess.Write))
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{
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try
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{
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drive.Pack.Save(fs);
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}
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catch (Exception e)
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{
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MessageBox.Show(String.Format("Unable to save disk {0}'s contents. Error {0}. Any changes have been lost.", e.Message), "Disk save error");
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}
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}
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}
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}
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//
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// Display handling
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//
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public void Render()
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{
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BeginInvoke(new DisplayDelegate(RefreshDisplayBox));
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}
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private void RefreshDisplayBox()
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{
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// Update the display
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BitmapData data = _displayBuffer.LockBits(_displayRect, ImageLockMode.WriteOnly, PixelFormat.Format1bppIndexed);
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IntPtr ptr = data.Scan0;
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System.Runtime.InteropServices.Marshal.Copy(_displayData, 0, ptr, _displayData.Length - 4);
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_displayBuffer.UnlockBits(data);
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DisplayBox.Refresh();
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// If you want interlacing to be more visible:
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//Array.Clear(_displayData, 0, _displayData.Length);
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}
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/// <summary>
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/// Invoked by the DisplayController to put a word on the emulated screen.
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/// </summary>
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/// <param name="scanline"></param>
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/// <param name="wordOffset"></param>
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/// <param name="word"></param>
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public void DrawDisplayWord(int scanline, int wordOffset, ushort word, bool lowRes)
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{
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// TODO: move magic numbers to constants
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if (lowRes)
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{
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// Low resolution; double up pixels.
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int address = scanline * 76 + wordOffset * 4;
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if (address > _displayData.Length)
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{
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throw new InvalidOperationException("Display word address is out of bounds.");
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}
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UInt32 stretched = StretchWord(word);
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_displayData[address] = (byte)(stretched >> 24);
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_displayData[address + 1] = (byte)(stretched >> 16);
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_displayData[address + 2] = (byte)(stretched >> 8);
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_displayData[address + 3] = (byte)(stretched);
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}
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else
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{
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int address = scanline * 76 + wordOffset * 2;
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if (address > _displayData.Length)
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{
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throw new InvalidOperationException("Display word address is out of bounds.");
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}
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_displayData[address] = (byte)(word >> 8);
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_displayData[address + 1] = (byte)(word);
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}
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}
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/// <summary>
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/// Invoked by the DisplayController to draw the cursor at the specified position on the given
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/// scanline.
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/// </summary>
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/// <param name="scanline">The scanline (Y)</param>
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/// <param name="xOffset">X offset (in pixels)</param>
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/// <param name="cursorWord">The word to be drawn</param>
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public void DrawCursorWord(int scanline, int xOffset, ushort cursorWord)
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{
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int address = scanline * 76 + xOffset / 8;
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//
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// Grab the 32 bits straddling the cursor from the display buffer
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// so we can merge the 16 cursor bits in.
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//
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UInt32 displayWord = (UInt32)((_displayData[address] << 24) |
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(_displayData[address + 1] << 16) |
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(_displayData[address + 2] << 8) |
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_displayData[address + 3]);
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UInt32 longcursorWord = (UInt32)(cursorWord << 16);
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displayWord ^= (longcursorWord >> (xOffset % 8));
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_displayData[address] = (byte)(displayWord >> 24);
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_displayData[address + 1] = (byte)(displayWord >> 16);
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_displayData[address + 2] = (byte)(displayWord >> 8);
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_displayData[address + 3] = (byte)(displayWord);
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}
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/// <summary>
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/// "Stretches" a 16 bit word into a 32-bit word (for low-res display purposes).
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/// </summary>
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/// <param name="word"></param>
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/// <returns></returns>
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private UInt32 StretchWord(ushort word)
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{
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UInt32 stretched = 0;
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for (int i = 0x8000, j = 15; j >= 0; i = i >> 1, j--)
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{
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uint bit = (uint)(word & i) >> j;
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stretched |= (bit << (j * 2 + 1));
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stretched |= (bit << (j * 2));
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}
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return stretched;
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}
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//
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// Keyboard and Mouse handling
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//
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/// <summary>
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/// Handle modifier keys here mostly because Windows Forms doesn't
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/// normally distinguish between left and right shift; the Alto keyboard does.
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/// CTRL is also handled here just because.
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/// </summary>
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/// <param name="m"></param>
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/// <returns></returns>
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protected override bool ProcessKeyEventArgs(ref Message m)
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{
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// Grab the scancode from the message
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int scanCode = ((int)m.LParam >> 16) & 0x1ff;
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bool down = false;
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const int WM_KEYDOWN = 0x100;
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const int WM_KEYUP = 0x101;
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if (m.Msg == WM_KEYDOWN)
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{
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down = true;
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}
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else if (m.Msg == WM_KEYUP)
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{
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down = false;
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}
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else
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{
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// Something else?
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return base.ProcessKeyEventArgs(ref m);
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}
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AltoKey modifierKey = AltoKey.None;
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switch(scanCode)
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{
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case 0x2a: // LShift
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modifierKey = AltoKey.LShift;
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break;
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case 0x36:
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modifierKey = AltoKey.RShift;
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break;
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case 0x1d:
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case 0x11d:
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modifierKey = AltoKey.CTRL;
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break;
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}
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if (modifierKey != AltoKey.None)
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{
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if (down)
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{
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_system.Keyboard.KeyDown(modifierKey);
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}
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else
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{
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_system.Keyboard.KeyUp(modifierKey);
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}
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return true; // handled
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}
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return base.ProcessKeyEventArgs(ref m);
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}
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// Hacky initial implementation of keyboard input.
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private void OnKeyDown(object sender, KeyEventArgs e)
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{
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if (!_mouseCaptured)
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{
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return;
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}
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// Handle non-modifier keys here
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if (_keyMap.ContainsKey(e.KeyCode))
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{
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_system.Keyboard.KeyDown(_keyMap[e.KeyCode]);
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}
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if (e.Alt)
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{
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ReleaseMouse();
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e.SuppressKeyPress = true;
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}
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}
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private void OnKeyUp(object sender, KeyEventArgs e)
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{
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if (!_mouseCaptured)
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{
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return;
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}
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// Handle non-modifier keys here
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if (_keyMap.ContainsKey(e.KeyCode))
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{
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_system.Keyboard.KeyUp(_keyMap[e.KeyCode]);
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}
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if (e.Alt)
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{
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ReleaseMouse();
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e.SuppressKeyPress = true;
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}
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}
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private void OnDisplayMouseMove(object sender, MouseEventArgs e)
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{
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if (!_mouseCaptured)
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{
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// We do nothing with mouse input unless we have capture.
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return;
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}
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if (_skipNextMouseMove)
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{
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_skipNextMouseMove = false;
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return;
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}
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// We implement a crude "mouse capture" behavior by forcing the mouse cursor to the
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// center of the display window and taking the delta of the last movement and using it
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// to move the Alto's mouse.
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// In this way the Windows cursor never leaves our window (important in order to prevent
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// other programs from getting clicked on while Missile Command is being played) and we
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// still get motion events.
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Point middle = new Point(DisplayBox.Width / 2, DisplayBox.Height / 2 );
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int dx = e.X - middle.X;
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int dy = e.Y - middle.Y;
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_system.Mouse.MouseMove(dx, dy);
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// Force (invisible) cursor to middle of window
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Cursor.Position = DisplayBox.PointToScreen(middle);
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// Don't handle the very next Mouse Move event (which will just be the motion we caused in the
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// above line...)
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_skipNextMouseMove = true;
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}
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private void OnDisplayMouseDown(object sender, MouseEventArgs e)
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{
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AltoMouseButton button = AltoMouseButton.None;
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switch (e.Button)
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{
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case MouseButtons.Left:
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button = AltoMouseButton.Left;
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break;
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case MouseButtons.Right:
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button = AltoMouseButton.Right;
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break;
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case MouseButtons.Middle:
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button = AltoMouseButton.Middle;
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break;
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}
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_system.Mouse.MouseDown(button);
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}
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private void OnDisplayMouseUp(object sender, MouseEventArgs e)
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{
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if (!_mouseCaptured)
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{
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// On mouse-up, capture the mouse if the system is running.
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if (_controller.IsRunning)
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{
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CaptureMouse();
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}
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return;
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}
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AltoMouseButton button = AltoMouseButton.None;
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switch (e.Button)
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{
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case MouseButtons.Left:
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button = AltoMouseButton.Left;
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break;
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case MouseButtons.Right:
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button = AltoMouseButton.Right;
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break;
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case MouseButtons.Middle:
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button = AltoMouseButton.Middle;
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break;
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}
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_system.Mouse.MouseUp(button);
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}
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private void CaptureMouse()
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{
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// In mouse-capture mode we do the following:
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// - Set the mouse pointer to nothing (so we just see the Alto mouse pointer)
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// - Keep the mouse within our window bounds (so it doesn't escape our window, hence "capture").
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// - Put some text in the Status area telling people how to leave...
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_mouseCaptured = true;
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ShowCursor(false);
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CaptureStatusLabel.Text = "Alto Mouse/Keyboard captured. Press Alt to release.";
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}
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private void ReleaseMouse()
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{
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_mouseCaptured = false;
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ShowCursor(true);
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CaptureStatusLabel.Text = "Click on display to capture Alto Mouse/Keyboard.";
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}
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/// <summary>
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/// Work around Windows Forms's bizarre refcounted cursor behavior...
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/// </summary>
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/// <param name="show"></param>
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private void ShowCursor(bool show)
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{
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if (show == _currentCursorState)
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{
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return;
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}
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if (show)
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{
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Cursor.Show();
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}
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else
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{
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Cursor.Hide();
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}
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_currentCursorState = show;
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}
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|
|
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private void OnWindowLeave(object sender, EventArgs e)
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|
{
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// We are no longer the focus, make sure to release the mouse.
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ReleaseMouse();
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|
}
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|
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private void OnWindowDeactivate(object sender, EventArgs e)
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|
{
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|
// We are no longer the focus, make sure to release the mouse.
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|
ReleaseMouse();
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|
}
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|
|
|
private void InitKeymap()
|
|
{
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|
_keyMap = new Dictionary<Keys, AltoKey>();
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|
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_keyMap.Add(Keys.A, AltoKey.A);
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_keyMap.Add(Keys.B, AltoKey.B);
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_keyMap.Add(Keys.C, AltoKey.C);
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|
_keyMap.Add(Keys.D, AltoKey.D);
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|
_keyMap.Add(Keys.E, AltoKey.E);
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|
_keyMap.Add(Keys.F, AltoKey.F);
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|
_keyMap.Add(Keys.G, AltoKey.G);
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|
_keyMap.Add(Keys.H, AltoKey.H);
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|
_keyMap.Add(Keys.I, AltoKey.I);
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|
_keyMap.Add(Keys.J, AltoKey.J);
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|
_keyMap.Add(Keys.K, AltoKey.K);
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|
_keyMap.Add(Keys.L, AltoKey.L);
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|
_keyMap.Add(Keys.M, AltoKey.M);
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|
_keyMap.Add(Keys.N, AltoKey.N);
|
|
_keyMap.Add(Keys.O, AltoKey.O);
|
|
_keyMap.Add(Keys.P, AltoKey.P);
|
|
_keyMap.Add(Keys.Q, AltoKey.Q);
|
|
_keyMap.Add(Keys.R, AltoKey.R);
|
|
_keyMap.Add(Keys.S, AltoKey.S);
|
|
_keyMap.Add(Keys.T, AltoKey.T);
|
|
_keyMap.Add(Keys.U, AltoKey.U);
|
|
_keyMap.Add(Keys.V, AltoKey.V);
|
|
_keyMap.Add(Keys.W, AltoKey.W);
|
|
_keyMap.Add(Keys.X, AltoKey.X);
|
|
_keyMap.Add(Keys.Y, AltoKey.Y);
|
|
_keyMap.Add(Keys.Z, AltoKey.Z);
|
|
_keyMap.Add(Keys.D0, AltoKey.D0);
|
|
_keyMap.Add(Keys.D1, AltoKey.D1);
|
|
_keyMap.Add(Keys.D2, AltoKey.D2);
|
|
_keyMap.Add(Keys.D3, AltoKey.D3);
|
|
_keyMap.Add(Keys.D4, AltoKey.D4);
|
|
_keyMap.Add(Keys.D5, AltoKey.D5);
|
|
_keyMap.Add(Keys.D6, AltoKey.D6);
|
|
_keyMap.Add(Keys.D7, AltoKey.D7);
|
|
_keyMap.Add(Keys.D8, AltoKey.D8);
|
|
_keyMap.Add(Keys.D9, AltoKey.D9);
|
|
_keyMap.Add(Keys.Space, AltoKey.Space);
|
|
_keyMap.Add(Keys.OemPeriod, AltoKey.Period);
|
|
_keyMap.Add(Keys.Oemcomma, AltoKey.Comma);
|
|
_keyMap.Add(Keys.OemQuotes, AltoKey.Quote);
|
|
_keyMap.Add(Keys.OemBackslash, AltoKey.BSlash);
|
|
_keyMap.Add(Keys.OemQuestion, AltoKey.FSlash);
|
|
_keyMap.Add(Keys.Oemplus, AltoKey.Plus);
|
|
_keyMap.Add(Keys.OemMinus, AltoKey.Minus);
|
|
_keyMap.Add(Keys.Escape, AltoKey.ESC);
|
|
_keyMap.Add(Keys.Delete, AltoKey.DEL);
|
|
_keyMap.Add(Keys.Left, AltoKey.Arrow);
|
|
_keyMap.Add(Keys.LShiftKey, AltoKey.LShift);
|
|
_keyMap.Add(Keys.RShiftKey, AltoKey.RShift);
|
|
_keyMap.Add(Keys.ControlKey, AltoKey.CTRL);
|
|
_keyMap.Add(Keys.Return, AltoKey.Return);
|
|
_keyMap.Add(Keys.F1, AltoKey.BlankTop);
|
|
_keyMap.Add(Keys.F2, AltoKey.BlankMiddle);
|
|
_keyMap.Add(Keys.F3, AltoKey.BlankBottom);
|
|
_keyMap.Add(Keys.Back, AltoKey.BS);
|
|
_keyMap.Add(Keys.Tab, AltoKey.TAB);
|
|
_keyMap.Add(Keys.OemSemicolon, AltoKey.Semicolon);
|
|
_keyMap.Add(Keys.OemOpenBrackets, AltoKey.LBracket);
|
|
_keyMap.Add(Keys.OemCloseBrackets, AltoKey.RBracket);
|
|
_keyMap.Add(Keys.Down, AltoKey.LF);
|
|
}
|
|
|
|
|
|
// Display related data.
|
|
// Note: display is actually 606 pixels wide, but that's not an even multiple of 8, so we round up.
|
|
private byte[] _displayData = new byte[808 * 76 + 4]; // + 4 to make cursor display logic simpler.
|
|
private Bitmap _displayBuffer;
|
|
private Rectangle _displayRect = new Rectangle(0, 0, 608, 808);
|
|
private delegate void DisplayDelegate();
|
|
|
|
// Input related data
|
|
|
|
// Keyboard mapping from windows vkeys to Alto keys
|
|
private Dictionary<Keys, AltoKey> _keyMap;
|
|
|
|
private bool _mouseCaptured;
|
|
private bool _currentCursorState;
|
|
private bool _skipNextMouseMove;
|
|
|
|
// The Alto system we're running
|
|
private AltoSystem _system;
|
|
|
|
// The controller for the system (to allow control by both debugger and main UI)
|
|
private ExecutionController _controller;
|
|
|
|
// The debugger, which may or may not be running.
|
|
private Debugger _debugger;
|
|
|
|
// strings. TODO: move to resource
|
|
private const string _noImageLoadedText = "<no image loaded>";
|
|
private const string _systemStoppedText = "Alto Stopped.";
|
|
private const string _systemRunningText = "Alto Running.";
|
|
private const string _systemErrorText = "Alto Stopped due to error. See Debugger.";
|
|
|
|
|
|
}
|
|
}
|