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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 class NativeGdi
{
[DllImport("user32.dll")]
public static extern IntPtr GetDC(IntPtr hWnd);
[DllImport("user32.dll")]
public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
[DllImport("gdi32.dll")]
public static extern int GetPixel(IntPtr hdc, int X, int Y);
[DllImport("gdi32.dll")]
public static extern int SetPixel(IntPtr hdc, int X, int Y, 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 NativeGdi.GetDC(hWnd);
else
return (IntPtr) null;
}
public override int ReleaseDC(IntPtr hWnd, IntPtr hDC)
{
if (available)
return NativeGdi.ReleaseDC(hWnd, hDC);
else
return 0;
}
public override int GetPixel(IntPtr hdc, int X, int Y)
{
if (available)
return NativeGdi.GetPixel(hdc, X, Y);
else
return 0;
}
public override int SetPixel(IntPtr hdc, int X, int Y, int crColor)
{
if (available)
return NativeGdi.SetPixel(hdc, X, Y, crColor);
else
return 0;
}
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 NativeGdi.BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, dwRop);
else
return 0;
}
}
}
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