public void DrawCircle(int x0, int y0, uint radius, Color8i color)
{
int f = 1 - (int)radius;
int ddF_x = 0;
int ddF_y = -2 * (int)radius;
int x = 0;
int y = (int)radius;
SetPixel(x0, y0 + (int)radius, color);
SetPixel(x0, y0 - (int)radius, color);
SetPixel(x0 + (int)radius, y0, color);
SetPixel(x0 - (int)radius, y0, color);
while (x < y)
{
if (f >= 0)
{
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x + 1;
SetPixel(x0 + x, y0 + y, color);
SetPixel(x0 - x, y0 + y, color);
SetPixel(x0 + x, y0 - y, color);
SetPixel(x0 - x, y0 - y, color);
SetPixel(x0 + y, y0 + x, color);
SetPixel(x0 - y, y0 + x, color);
SetPixel(x0 + y, y0 - x, color);
SetPixel(x0 - y, y0 - x, color);
}
}
public void DrawCircleFilled(int x0, int y0, uint radius, Color8i color)
{
for (int i = x0 - (int)radius; i <= x0 + radius; i++)
{
for (int k = y0 - (int)radius; k <= y0 + radius; k++)
{
// check if point in image
if (i < 1 | i > Width - 1) continue;
if (k < 1 | k > Height - 1) continue;
// calc distance
Tuple2is a = new Tuple2is(x0, y0);
Tuple2is b = new Tuple2is(i, k);
double distance = a % b;
if (radius > distance)
{
SetPixel(i, k, color);
}
}
}
}
public void DrawRectangle(int x, int y, uint w, uint h, Color8i color)
{
DrawLine(x, y, x + (int)w, y, color); // von 1 zu 2
DrawLine(x + (int)w, y, x + (int)w, y + (int)h, color); // von 2 zu 3
DrawLine(x + (int)w, y + (int)h, x, y + (int)h, color); // von 3 zu 4
DrawLine(x, y + (int)h, x, y, color); // von 4 zu 1
}
public void DrawRectangleFilled(int x, int y, uint w, uint h, Color8i color)
{
if (x >= Width || y >= Height) throw new ArgumentOutOfRangeException("x or y", "Out of image.");
uint bpp = GetBytePerPixelFromChannelFormat(ChannelFormat);
uint start = (uint)System.Math.Max(-x, 0);
uint end = (uint)System.Math.Min(w, Width - x);
uint jstart = (uint)System.Math.Max(-y, 0);
uint jend = (uint)System.Math.Min(h, Height - y);
unsafe
{
fixed(byte* dst_=imageData)
{
byte* dst__ = dst_ + x * bpp + start;
uint dw = Width * bpp;
if (ChannelFormat == ChannelFormat.Gray)
{
byte g = color.R;
for (uint j = jstart; j < jend; j++)
{
byte* dst = dst__ + dw * (y + j);
for (uint i = start; i < end; i++) *dst++ = g;
}
}
else if (ChannelFormat == ChannelFormat.RGB)
{
byte r = color.R;
byte g = color.G;
byte b = color.B;
for (uint j = jstart; j < jend; j++)
{
byte* dst = dst__ + dw * (y + j);
for (uint i = start; i < end; i++)
{
*dst++ = b;
*dst++ = g;
*dst++ = r;
}
}
}
else if (ChannelFormat == ChannelFormat.BGR)
{
byte r = color.R;
byte g = color.G;
byte b = color.B;
for (uint j = jstart; j < jend; j++)
{
byte* dst = dst__ + dw * (y + j);
for (uint i = start; i < end; i++)
{
*dst++ = r;
*dst++ = g;
*dst++ = b;
}
}
}
else if (ChannelFormat == ChannelFormat.RGBA)
{
byte r = color.R;
byte g = color.G;
byte b = color.B;
byte a = color.A;
for (uint j = jstart; j < jend; j++)
{
byte* dst = dst__ + dw * (y + j);
for (uint i = start; i < end; i++)
{
*dst++ = b;
*dst++ = g;
*dst++ = r;
*dst++ = a;
}
}
}
else if (ChannelFormat == ChannelFormat.BGRA)
{
byte r = color.R;
byte g = color.G;
byte b = color.B;
byte a = color.A;
for (uint j = jstart; j < jend; j++)
{
byte* dst = dst__ + dw * (y + j);
for (uint i = start; i < end; i++)
{
*dst++ = r;
*dst++ = g;
*dst++ = b;
*dst++ = a;
}
}
}
else if (ChannelFormat == ChannelFormat.GrayAlpha)
{
byte g = color.R;
byte a = color.A;
for (uint j = jstart; j < jend; j++)
{
byte* dst = dst__ + dw * (y + j);
for (uint i = start; i < end; i++)
{
*dst++ = g;
*dst++ = a;
}
}
}
}
}
}
/// <summary>
/// Sets the pixel.
/// </summary>
/// <param name="x">The x coordinate.</param>
/// <param name="y">The y coordinate.</param>
/// <param name="color">Color.</param>
public void SetPixel(uint x, uint y, Color8i color)
{
if (x >= Width || y >= Height) return;
ulong pos = y * Width + x;
pos *= GetBytePerPixelFromChannelFormat(ChannelFormat);
switch (ChannelFormat)
{
case ChannelFormat.Gray:
{
imageData[pos] = color.R;
break;
}
case ChannelFormat.GrayAlpha:
{
imageData[pos] = color.R;
imageData[pos + 1] = color.A;
break;
}
case ChannelFormat.BGR:
{
imageData[pos] = color.R;
imageData[pos + 1] = color.G;
imageData[pos + 2] = color.B;
break;
}
case ChannelFormat.BGRA:
{
imageData[pos] = color.R;
imageData[pos + 1] = color.G;
imageData[pos + 2] = color.B;
imageData[pos + 3] = color.A;
break;
}
case ChannelFormat.RGB:
{
imageData[pos] = color.B;
imageData[pos + 1] = color.G;
imageData[pos + 2] = color.R;
break;
}
case ChannelFormat.RGBA:
{
imageData[pos] = color.B;
imageData[pos + 1] = color.G;
imageData[pos + 2] = color.R;
imageData[pos + 3] = color.A;
break;
}
}
}
public void SetPixel(int x, int y, Color8i color)
{
SetPixel((uint)x, (uint)y, color);
}
public void DrawLine(int xStart, int yStart, int xEnd, int yEnd, Color8i color)
{
// Init
int x, y, t, dist, xerr, yerr, dx, dy, incx, incy;
// Calculate distance
dx = xEnd - xStart;
dy = yEnd - yStart;
// Estimate sign
if (dx < 0)
{
incx = -1;
dx = -dx;
}
else if (dx > 0) incx = 1;
else incx = 0;
if (dy < 0)
{
incy = -1;
dy = -dy;
}
else if (dy > 0) incy = 1;
else incy = 0;
// which distance is greater?
dist = (dx > dy) ? dx : dy;
// Init
x = xStart;
y = yStart;
xerr = dx;
yerr = dy;
// Calculate pixel
for (t = 0; t < dist; ++t)
{
SetPixel(x, y, color);
xerr += dx;
yerr += dy;
if (xerr > dist)
{
xerr -= dist;
x += incx;
}
if (yerr > dist)
{
yerr -= dist;
y += incy;
}
}
SetPixel(xEnd, yEnd, color);
}
/// <summary>
/// Fills the with mandelbrot.
/// </summary>
/// <param name="x1">Cut of graphic.</param>
/// <param name="y1">Cut of graphic.</param>
/// <param name="x2">Cut of graphic.</param>
/// <param name="y2">Cut of graphic.</param>
/// <param name="depth">Calc depth.</param>
public void FillWithMandelbrot(double x1, double y1, double x2, double y2, byte depth)
{
int d; // Counter for depth
double dx, dy; // Increment per pixel
double px, py; // current word coordinate
double u, v; // calculation variables
double ax, ay; // calculation variables
Color8i[] c = new Color8i[256];
// create random colors
Random randomColors = new Random();
for (int i = 0; i < 256; i++)
{
c[i] = new Color8i((byte)randomColors.Next(255), (byte)randomColors.Next(255), (byte)randomColors.Next(255));
}
dx = (x2 - x1) / Width;
dy = (y2 - y1) / Height;
// create the image
for (uint y = 0; y < Height; y++)
{
for (uint x = 0; x < Width; x++)
{
px = x1 + x * dx;
py = y1 + y * dy;
d = 0;
ax = 0;
ay = 0;
do
{
u = ax * ax - ay * ay + px;
v = 2 * ax * ay + py;
ax = u;
ay = v;
d++;
}
while(!(ax * ax + ay * ay > 8 || d == depth));
SetPixel(x, y, c[d]);
}
}
}
public void Fill(Color8i color)
{
unsafe
{
fixed(byte* dst_=imageData)
{
byte* dst = dst_;
if (ChannelFormat == ChannelFormat.Gray)
{
byte g = color.R;
int len = imageData.Length;
for (int i = 0; i < len; i++) *dst++ = g;
}
else if (ChannelFormat == ChannelFormat.RGB)
{
byte r = color.R;
byte g = color.G;
byte b = color.B;
int len = imageData.Length / 3;
for (int i = 0; i < len; i++)
{
*dst++ = b;
*dst++ = g;
*dst++ = r;
}
}
else if (ChannelFormat == ChannelFormat.BGR)
{
byte r = color.R;
byte g = color.G;
byte b = color.B;
int len = imageData.Length / 3;
for (int i = 0; i < len; i++)
{
*dst++ = r;
*dst++ = g;
*dst++ = b;
}
}
else if (ChannelFormat == ChannelFormat.RGBA)
{
byte r = color.R;
byte g = color.G;
byte b = color.B;
byte a = color.A;
int len = imageData.Length / 4;
for (int i = 0; i < len; i++)
{
*dst++ = b;
*dst++ = g;
*dst++ = r;
*dst++ = a;
}
}
else if (ChannelFormat == ChannelFormat.BGRA)
{
byte r = color.R;
byte g = color.G;
byte b = color.B;
byte a = color.A;
int len = imageData.Length / 4;
for (int i = 0; i < len; i++)
{
*dst++ = r;
*dst++ = g;
*dst++ = b;
*dst++ = a;
}
}
else if (ChannelFormat == ChannelFormat.GrayAlpha)
{
byte g = color.R;
byte a = color.A;
int len = imageData.Length / 2;
for (int i = 0; i < len; i++)
{
*dst++ = g;
*dst++ = a;
}
}
}
}
}
