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using System;
using System.Runtime.InteropServices;
namespace GdiTest
{
public class Win32GDI : GDI
{
static bool available = false;
static bool initialized = false;
static Win32GDI instance = null;
public struct Callbacks
{
[DllImport("user32.dll")]
public static extern IntPtr GetDC(IntPtr hWnd);
[DllImport("user32.dll")]
public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
[DllImport("gdi32")]
public static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj);
[DllImport("gdi32")]
public static extern bool DeleteObject(IntPtr hObject);
[DllImport("gdi32.dll")]
public static extern uint GetPixel(IntPtr hdc, int X, int Y);
[DllImport("gdi32.dll")]
public static extern uint SetPixel(IntPtr hdc, int X, int Y, uint crColor);
[DllImport("gdi32")]
public static extern bool MoveToEx(IntPtr hdc, int X, int Y, IntPtr lpPoint);
[DllImport("gdi32.dll")]
public static extern bool LineTo(IntPtr hdc, int nXEnd, int nYEnd);
[DllImport("gdi32")]
public static extern IntPtr CreatePen(int fnPenStyle, int nWidth, int crColor);
[DllImport("gdi32.dll")]
public static extern int BitBlt(
IntPtr hdcDest,
int nXDest,
int nYDest,
int nWidth,
int nHeight,
IntPtr hdcSrc,
int nXSrc,
int nYSrc,
System.Int32 dwRop
);
}
public Win32GDI ()
{
this.init();
}
public static Win32GDI getInstance()
{
if (!initialized)
{
instance = new Win32GDI();
initialized = true;
}
return instance;
}
public override void init()
{
int p = (int) Environment.OSVersion.Platform;
if ((p == 4) || (p == 6) || (p == 128)) {
available = false;
} else {
available = true;
}
}
public override bool isAvailable()
{
return available;
}
public override IntPtr GetDC(IntPtr hWnd)
{
if (available)
return Callbacks.GetDC(hWnd);
else
return (IntPtr) null;
}
public override int ReleaseDC(IntPtr hWnd, IntPtr hDC)
{
if (available)
return Callbacks.ReleaseDC(hWnd, hDC);
else
return 0;
}
public override IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj)
{
if (available)
return Callbacks.SelectObject(hdc, hgdiobj);
else
return (IntPtr) null;
}
public override bool DeleteObject(IntPtr hObject)
{
if (available)
return Callbacks.DeleteObject(hObject);
else
return false;
}
public override uint GetPixel(IntPtr hdc, int X, int Y)
{
if (available)
return Callbacks.GetPixel(hdc, X, Y);
else
return 0;
}
public override uint SetPixel(IntPtr hdc, int X, int Y, uint crColor)
{
if (available)
return Callbacks.SetPixel(hdc, X, Y, crColor);
else
return 0;
}
public System.Drawing.Color GetPixelColor(int x, int y)
{
IntPtr hdc = GetDC(IntPtr.Zero);
uint pixel = Callbacks.GetPixel(hdc, x, y);
ReleaseDC(IntPtr.Zero, hdc);
System.Drawing.Color color = System.Drawing.Color.FromArgb((int)(pixel & 0x000000FF),
(int)(pixel & 0x0000FF00) >> 8,
(int)(pixel & 0x00FF0000) >> 16);
return color;
}
public override bool MoveToEx(IntPtr hdc, int X, int Y, IntPtr lpPoint)
{
if (available)
return Callbacks.MoveToEx(hdc, X, Y, lpPoint);
else
return false;
}
public override bool LineTo(IntPtr hdc, int nXEnd, int nYEnd)
{
if (available)
return Callbacks.LineTo(hdc, nXEnd, nYEnd);
else
return false;
}
public override IntPtr CreatePen(int fnPenStyle, int nWidth, int crColor)
{
if (available)
return Callbacks.CreatePen(fnPenStyle, nWidth, crColor);
else
return (IntPtr) null;
}
public override int BitBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight,
IntPtr hdcSrc, int nXSrc, int nYSrc, System.Int32 dwRop)
{
if (available)
return Callbacks.BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, dwRop);
else
return 0;
}
}
}
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