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Code Issues Releases Wiki Activity

Changed the region of the tiles to float, using fatser Win32 BitBlt for much faster memory paint

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This commit is contained in:
Flynn
2022-01-27 10:52:26 +01:00
parent e4c3af0682
commit 6bf01d069c
1 changed files with 127 additions and 6 deletions
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131
KVMControl.cs
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@@ -22,6 +22,8 @@ using System.Drawing;
using System.Windows.Forms;
using System.ComponentModel;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Diagnostics;
namespace MeshCentralRouter
{
@@ -57,6 +59,57 @@ namespace MeshCentralRouter
private long killNextKeyPress = 0;
//System level functions to be used for hook and unhook keyboard input
private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr SetWindowsHookEx(int id, LowLevelKeyboardProc callback, IntPtr hMod, uint dwThreadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern bool UnhookWindowsHookEx(IntPtr hook);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr CallNextHookEx(IntPtr hook, int nCode, IntPtr wp, IntPtr lp);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr GetModuleHandle(string name);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern short GetAsyncKeyState(Keys key);
[DllImport("user32.dll")]
static extern IntPtr GetForegroundWindow();
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)] public static extern IntPtr CreateCompatibleDC(IntPtr hDC);
[DllImport("gdi32.dll", ExactSpelling = true)] public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
[DllImport("gdi32.dll", ExactSpelling = true)] public static extern IntPtr DeleteObject(IntPtr hObject);
[DllImport("gdi32.dll")] private static extern bool BitBlt(IntPtr hdcDest, Int32 nXDest, Int32 nYDest, Int32 nWidth, Int32 nHeight, IntPtr hdcSrc, Int32 nXSrc, Int32 nYSrc, TernaryRasterOperations dwRop);
[DllImport("gdi32.dll")] private static extern bool StretchBlt(IntPtr hdcDest, int nXOriginDest, int nYOriginDest, int nWidthDest, int nHeightDest, IntPtr hdcSrc, int nXOriginSrc, int nYOriginSrc, int nWidthSrc, int nHeightSrc, TernaryRasterOperations dwRop);
[DllImport("gdi32.dll")] static extern bool SetStretchBltMode(IntPtr hdc, StretchMode iStretchMode);
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)] private static extern bool DeleteDC(IntPtr hdc);
public enum StretchMode
{
STRETCH_ANDSCANS = 1,
STRETCH_ORSCANS = 2,
STRETCH_DELETESCANS = 3,
STRETCH_HALFTONE = 4,
}
public enum TernaryRasterOperations
{
SRCCOPY = 0x00CC0020, /* dest = source*/
SRCPAINT = 0x00EE0086, /* dest = source OR dest*/
SRCAND = 0x008800C6, /* dest = source AND dest*/
SRCINVERT = 0x00660046, /* dest = source XOR dest*/
SRCERASE = 0x00440328, /* dest = source AND (NOT dest )*/
NOTSRCCOPY = 0x00330008, /* dest = (NOT source)*/
NOTSRCERASE = 0x001100A6, /* dest = (NOT src) AND (NOT dest) */
MERGECOPY = 0x00C000CA, /* dest = (source AND pattern)*/
MERGEPAINT = 0x00BB0226, /* dest = (NOT source) OR dest*/
PATCOPY = 0x00F00021, /* dest = pattern*/
PATPAINT = 0x00FB0A09, /* dest = DPSnoo*/
PATINVERT = 0x005A0049, /* dest = pattern XOR dest*/
DSTINVERT = 0x00550009, /* dest = (NOT dest)*/
BLACKNESS = 0x00000042, /* dest = BLACK*/
WHITENESS = 0x00FF0062, /* dest = WHITE*/
};
private enum KvmCommands
{
Nop = 0,
@@ -218,7 +271,7 @@ namespace MeshCentralRouter
ushort tile_y = (ushort)((buffer[off + 6] << 8) + buffer[off + 7]);
try { newtile = Image.FromStream(new System.IO.MemoryStream(buffer, off + 8, blen - 8)); } catch (Exception) { return blen; }
Rectangle r = new Rectangle((int)tile_x, (int)tile_y, newtile.Width, newtile.Height);
Rectangle r3 = new Rectangle((int)((double)tile_x / (double)scalefactor) - 2, (int)((double)tile_y / (double)scalefactor) - 2, (int)((double)newtile.Width / (double)scalefactor) + 4, (int)((double)newtile.Height / (double)scalefactor) + 4);
Rectangle r3 = new Rectangle((int)Math.Round((double)tile_x / (double)scalefactor) - 2, (int)Math.Round((double)tile_y / (double)scalefactor) - 2, (int)Math.Round((double)newtile.Width / (double)scalefactor) + 4, (int)Math.Round((double)newtile.Height / (double)scalefactor) + 4);
tilecount++;
// Winform mode
@@ -226,8 +279,21 @@ namespace MeshCentralRouter
{
lock (desktop)
{
desktopGraphics.DrawImage(newtile, new Rectangle((int)tile_x, (int)tile_y, newtile.Width, newtile.Height), new Rectangle(0, 0, newtile.Width, newtile.Height), GraphicsUnit.Pixel);
if (debugmode)
Graphics MemGraphics = Graphics.FromImage(newtile);
IntPtr hBitmap = ((Bitmap)newtile).GetHbitmap();
IntPtr memdc = MemGraphics.GetHdc();
IntPtr pOrig = SelectObject(memdc, hBitmap);
IntPtr dcDst = desktopGraphics.GetHdc();
bool bok = BitBlt(dcDst, (int)tile_x, (int)tile_y, (int)newtile.Width, (int)newtile.Height, memdc, (int)0, (int)0, TernaryRasterOperations.SRCCOPY);
IntPtr pNew = SelectObject(memdc, pOrig); // == hBitmap
DeleteObject(pNew);
desktopGraphics.ReleaseHdc(dcDst);
MemGraphics.ReleaseHdc(memdc);
if(debugmode)
{
desktopGraphics.DrawRectangle(RedPen, new Rectangle((int)tile_x, (int)tile_y, newtile.Width - 1, newtile.Height - 1));
desktopGraphics.DrawString(string.Format("{0} / {1}kb", tilecount, blen / 2014), DebugFont, RedPen.Brush, new Point((int)tile_x, (int)tile_y));
@@ -362,7 +428,7 @@ namespace MeshCentralRouter
else
{
//g.DrawImage((Image)desktop, new Rectangle(0, 0, Width, Height), 0, 0, screenWidth, screenHeight, GraphicsUnit.Pixel);
g.DrawImage((Image)desktop, e.ClipRectangle, (int)((double)e.ClipRectangle.Left * (double)scalefactor), (int)((double)e.ClipRectangle.Top * (double)scalefactor), (int)((double)e.ClipRectangle.Width * (double)scalefactor), (int)((double)e.ClipRectangle.Height * (double)scalefactor), GraphicsUnit.Pixel);
g.DrawImage((Image)desktop, e.ClipRectangle, (float)((double)e.ClipRectangle.Left * (double)scalefactor), (float)((double)e.ClipRectangle.Top * (double)scalefactor), (float)((double)e.ClipRectangle.Width * (double)scalefactor), (float)((double)e.ClipRectangle.Height * (double)scalefactor), GraphicsUnit.Pixel);
}
}
}
@@ -422,7 +488,7 @@ namespace MeshCentralRouter
if (remoteKeyboardMap == true) { SendKey((byte)e.KeyCode, action); return; } // Use old key system that uses the remote keyboard mapping.
string keycode = e.KeyCode.ToString();
if ((action == 0) && (e.Control == false) && (e.Alt == false) && (((e.KeyValue >= 48) && (e.KeyValue <= 57)) || (keycode.Length == 1) || (keycode.StartsWith("Oem") == true))) return;
if ((action == 0) && (e.Control == false) && (e.Alt == false) && (((e.KeyValue >= 48) && (e.KeyValue <= 57))|| ((e.KeyValue >= 96) && (e.KeyValue <= 105)) || (keycode.Length == 1) || (keycode.StartsWith("Oem") == true))) return;
if ((e.Control == true) || (e.Alt == true)) { killNextKeyPress = DateTime.Now.Ticks; }
SendKey((byte)e.KeyCode, action);
e.Handled = true;
@@ -738,5 +804,60 @@ namespace MeshCentralRouter
return false;
}
// Structure contain information about low-level keyboard input event
private struct KBDLLHOOKSTRUCT
{
public Keys key;
public int scanCode;
public int flags;
public int time;
public IntPtr extra;
}
//Declaring Global objects
private IntPtr ptrHook;
private LowLevelKeyboardProc objKeyboardProcess;
private IntPtr captureKey(int nCode, IntPtr wp, IntPtr lp)
{
bool bIsForegroundWindow = false;
try { bIsForegroundWindow = GetForegroundWindow() == this.ParentForm.Handle; } catch { }
if(nCode >= 0 && bIsForegroundWindow)
{
KBDLLHOOKSTRUCT objKeyInfo = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lp, typeof(KBDLLHOOKSTRUCT));
// Disabling Windows keys
if(objKeyInfo.key == Keys.RWin || objKeyInfo.key == Keys.LWin)
{
bool bKeyDown = wp == (IntPtr)0x0100/*WM_KEYDOWN*/;
SendKey(new KeyEventArgs((Keys)objKeyInfo.key), (byte)(bKeyDown ? 0 : 1));
// SendKey(new KeyEventArgs((Keys)objKeyInfo.key), 0);
return (IntPtr)1; // if 0 is returned then All the above keys will be enabled
// return (IntPtr)0; // if 0 is returned then All the above keys will be enabled
}
}
return CallNextHookEx(ptrHook, nCode, wp, lp);
}
bool HasAltModifier(int flags)
{
return (flags & 0x20) == 0x20;
}
private void KVMControl_Load(object sender, EventArgs e)
{
ProcessModule objCurrentModule = Process.GetCurrentProcess().MainModule;
objKeyboardProcess = new LowLevelKeyboardProc(captureKey);
ptrHook = SetWindowsHookEx(13, objKeyboardProcess, GetModuleHandle(objCurrentModule.ModuleName), 0);
}
/* Code to Disable WinKey, Alt+Tab, Ctrl+Esc Ends Here */
}
}