public static Canvas GetFullScreenCanvas(Mode mode)
{
if (MyVideoDriver == null)
return MyVideoDriver = new VBEScreen(mode);
/* We have already got a VideoDriver istance simple change its mode */
MyVideoDriver.Mode = mode;
return MyVideoDriver;
}
public VBEScreen(Mode mode) : base(mode)
{
if (!IsModeValid(mode))
throw new ArgumentOutOfRangeException($"Mode {mode} is not supported by VBE Driver");
VBEDriver = new VBEDriver((ushort)mode.Rows, (ushort)mode.Columns, (ushort)mode.ColorDepth);
}
public bool Equals(Mode other)
{
if (this.columns == other.columns && this.rows == other.rows && this.color_depth == other.color_depth)
return true;
return false;
}
public int CompareTo(Mode other)
{
// color_depth has no effect on the orderiring
if (this.columns < other.columns && this.rows < other.rows)
return -1;
if (this.columns > other.columns && this.rows > other.rows)
return 1;
// They are effectively Equals
return 0;
}
public VGA(bool buffered = true)
{
byte[] g_320x200x256 =
{
/* MISC */
0x63,
/* SEQ */
0x03, 0x01, 0x0F, 0x00, 0x0E,
/* CRTC */
0x5F, 0x4F, 0x50, 0x82, 0x54, 0x80, 0xBF, 0x1F,
0x00, 0x41, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x9C, 0x0E, 0x8F, 0x28, 0x40, 0x96, 0xB9, 0xA3,
0xFF,
/* GC */
0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x05, 0x0F,
0xFF,
/* AC */
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x41, 0x00, 0x0F, 0x00, 0x00
};
fixed(byte *fixedPTR = g_320x200x256)
{
WriteRegs(fixedPTR);
}
if (!buffered)
{
writeOnVGAMem = true;
return;
}
ScrW = 320;
ScrH = 200;
PixelStride = (byte)((BitsPerPixel | 7) >> 3);
Pitch = ScrW * PixelStride;
BackBuffer = (byte *)(ScrH * Pitch);
bufsize = ScrH * Pitch;
Mode = new Sys.Graphics.Mode(ScrW, ScrH, Sys.Graphics.ColorDepth.ColorDepth8);
colorsInBuffer = new Color[(ScrH * ScrW)];
}
/// <summary>
/// Use this to setup the screen, this will disable the console.
/// </summary>
/// <param name="Mode">The desired Mode resolution</param>
private void SetMode(Mode mode)
{
if (!IsModeValid(mode))
throw new ArgumentOutOfRangeException($"Mode {mode} is not supported by VBE Driver");
ushort xres = (ushort)Mode.Rows;
ushort yres = (ushort)Mode.Columns;
ushort bpp = (ushort)Mode.ColorDepth;
//set the screen
VBEDriver.VBESet(xres, yres, bpp);
}
protected Canvas(Mode mode)
{
this.mode = mode;
aviableModes = getAviableModes();
defaultGraphicMode = getDefaultGraphicMode();
}
protected bool IsModeValid(Mode mode)
{
/* This would have been the more "modern" version but LINQ is not working */
//return aviableModes.Exists(element => element == mode);
foreach(var elem in aviableModes)
{
if (elem == mode)
return true;
}
/* 'mode' was not in the 'aviableModes' List ==> 'mode' in NOT Valid */
return false;
}
