public PixelData(int width, int height, int bytesPerPixel, byte[] raw, GetPixelDelegate getPixel, SetPixelDelegate setPixel)
{
Width = width;
Height = height;
BytesPerPixel = bytesPerPixel;
Raw = raw;
_setPixel = setPixel;
_getPixel = getPixel;
}
public static void SetPixel(
int x,
int y,
int texWidth,
int texHeight,
SetPixelDelegate setPixelDelegate,
int rad = 2)
{
if (x + rad < 0 || y + rad < 0)
{
return;
}
if (x - rad >= texWidth || y - rad >= texHeight)
{
return;
}
int dx_start = x - rad >= 0 ? -rad : -x;
int dx_end = x + rad < texWidth ? rad : texWidth - x - 1;
int dy_start = y - rad >= 0 ? -rad : -y;
int dy_end = y + rad < texHeight ? rad : texHeight - y - 1;
int rad_sq = rad * rad;
for (int dx = dx_start; dx <= dx_end; dx++)
{
int cur_x = x + dx;
int dx_sq = dx * dx;
for (int dy = dy_start; dy <= dy_end; dy++)
{
if (dx_sq + dy * dy <= rad_sq)
{
setPixelDelegate(cur_x, y + dy);
}
}
}
}
public void SetGraphicsMode(ScreenSize aSize, ColorDepth aDepth)
{
switch (aSize)
{
case ScreenSize.Size320x200:
if (aDepth == ColorDepth.BitDepth8)
{
WriteVGARegisters(g_320x200x8);
PixelWidth = 320;
PixelHeight = 200;
Colors = 256;
SetPixel = new SetPixelDelegate(SetPixel320x200x8);
GetPixel = new GetPixelDelegate(GetPixel320x200x8);
}
else if (aDepth == ColorDepth.BitDepth4)
{
WriteVGARegisters(g_320x200x4);
PixelWidth = 320;
PixelHeight = 200;
Colors = 16;
//SetPixel = new SetPixelDelegate(SetPixel320x200x4);
//GetPixel = new GetPixelDelegate(GetPixel320x200x4);
}
else throw new Exception("Unsupported color depth passed for specified screen size");
break;
case ScreenSize.Size640x480:
if (aDepth == ColorDepth.BitDepth2)
{
WriteVGARegisters(g_640x480x2);
PixelWidth = 640;
PixelHeight = 480;
Colors = 4;
//SetPixel = new SetPixelDelegate(SetPixel640x480x2);
//GetPixel = new GetPixelDelegate(GetPixel640x480x2);
}
else if (aDepth == ColorDepth.BitDepth4)
{
WriteVGARegisters(g_640x480x4);
PixelWidth = 640;
PixelHeight = 480;
Colors = 16;
SetPixel = new SetPixelDelegate(SetPixel640x480x4);
GetPixel = new GetPixelDelegate(GetPixel640x480x4);
}
else throw new Exception("Unsupported color depth passed for specified screen size");
break;
case ScreenSize.Size720x480:
if (aDepth == ColorDepth.BitDepth4)
{
WriteVGARegisters(g_720x480x4);
PixelWidth = 720;
PixelHeight = 480;
Colors = 16;
SetPixel = new SetPixelDelegate(SetPixel720x480x4);
GetPixel = new GetPixelDelegate(GetPixel720x480x4);
}
else throw new Exception("Unsupported color depth passed for specified screen size");
break;
default:
throw new Exception("Unknown screen size");
}
}
public VGAScreen()
{
SetPixel = new SetPixelDelegate(SetPixelNoMode);
GetPixel = new GetPixelDelegate(GetPixelNoMode);
}
public static void SetMode640x480x4()
{
WriteVGARegisters(g_640x480x16);
PixelWidth = 640;
PixelHeight = 480;
Colors = 16;
SetPixel = new SetPixelDelegate(SetPixel640x480x4);
}
public static void SetMode320x200x8()
{
WriteVGARegisters(g_320x200x256);
PixelWidth = 320;
PixelHeight = 200;
Colors = 256;
SetPixel = new SetPixelDelegate(SetPixel320x200x8);
}
public static void DrawLine(Texture2D tex, Point2D p1, Point2D p2, Color color, SetPixelDelegate setPixel)
{
int x1 = p1.X;
int y1 = p1.Y;
int x2 = p2.X;
int y2 = p2.Y;
// zmienne pomocnicze
int d, dx, dy, ai, bi, xi, yi;
int x = x1, y = y1;
// ustalenie kierunku rysowania
if (x1 < x2)
{
xi = 1;
dx = x2 - x1;
}
else
{
xi = -1;
dx = x1 - x2;
}
// ustalenie kierunku rysowania
if (y1 < y2)
{
yi = 1;
dy = y2 - y1;
}
else
{
yi = -1;
dy = y1 - y2;
}
// pierwszy piksel
if (x >= tex.width || x < 0 || y >= tex.height || y < 0)
return;
setPixel(new Point2D(x, y), color);
// oś wiodąca OX
if (dx > dy)
{
ai = (dy - dx) * 2;
bi = dy * 2;
d = bi - dx;
// pętla po kolejnych x
while (x != x2)
{
// test współczynnika
if (d >= 0)
{
x += xi;
y += yi;
d += ai;
}
else
{
d += bi;
x += xi;
}
if (x >= tex.width || x < 0 || y >= tex.height || y < 0)
return;
setPixel(new Point2D(x, y), color);
}
}
// oś wiodąca OY
else
{
ai = ( dx - dy ) * 2;
bi = dx * 2;
d = bi - dy;
// pętla po kolejnych y
while (y != y2)
{
// test współczynnika
if (d >= 0)
{
x += xi;
y += yi;
d += ai;
}
else
{
d += bi;
y += yi;
}
if (x >= tex.width || x < 0 || y >= tex.height || y < 0)
return;
setPixel(new Point2D(x, y), color);
}
}
}
