public static void DrawLineEFLA(this WriteableBitmap bmp, int x1, int y1, int x2, int y2, Color color, EFLAMode mode)
{
int a = color.A + 1;
int col = (color.A << 24)
| ((byte) ((color.R*a) >> 8) << 16)
| ((byte) ((color.G*a) >> 8) << 8)
| ((byte) ((color.B*a) >> 8));
DrawLineEFLA(bmp, x1, y1, x2, y2, col, mode);
}
public static void DrawLineEFLA(this WriteableBitmap bmp, int x1, int y1, int x2, int y2, int color, EFLAMode mode)
{
int w = bmp.PixelWidth;
int h = bmp.PixelHeight;
bmp.Lock();
bool yLonger;
int incrementVal, endVal;
int shortLen;
int longLen;
unsafe
{
var pixels = (int*) bmp.BackBuffer;
int x, y;
switch (mode)
{
case EFLAMode.Div:
yLonger = false;
shortLen = y2 - y1;
longLen = x2 - x1;
if (Math.Abs(shortLen) > Math.Abs(longLen))
{
int swap = shortLen;
shortLen = longLen;
longLen = swap;
yLonger = true;
}
if (longLen < 0) incrementVal = -1;
else incrementVal = 1;
double divDiff;
if (shortLen == 0) divDiff = longLen;
else divDiff = longLen/(double) shortLen;
if (yLonger)
{
for (int i = 0; i != longLen; i += incrementVal)
{
x = x1 + (int) (i/divDiff);
y = y1 + i;
pixels[y*w + x] = color;
}
}
else
{
for (int i = 0; i != longLen; i += incrementVal)
{
x = x1 + i;
y = y1 + (int) (i/divDiff);
pixels[y*w + x] = color;
}
}
break;
case EFLAMode.Mul:
yLonger = false;
shortLen = y2 - y1;
longLen = x2 - x1;
if (Math.Abs(shortLen) > Math.Abs(longLen))
{
int swap = shortLen;
shortLen = longLen;
longLen = swap;
yLonger = true;
}
if (longLen < 0) incrementVal = -1;
else incrementVal = 1;
double multDiff;
if (longLen == 0.0) multDiff = shortLen;
else multDiff = shortLen/(double) longLen;
if (yLonger)
{
for (int i = 0; i != longLen; i += incrementVal)
{
x = x1 + (int) (i*multDiff);
y = y1 + i;
pixels[y*w + x] = color;
}
}
else
{
for (int i = 0; i != longLen; i += incrementVal)
{
x = x1 + i;
y = y1 + (int) (i*multDiff);
pixels[y*w + x] = color;
}
}
break;
case EFLAMode.Add:
yLonger = false;
shortLen = y2 - y1;
longLen = x2 - x1;
if (Math.Abs(shortLen) > Math.Abs(longLen))
{
int swap = shortLen;
shortLen = longLen;
longLen = swap;
yLonger = true;
}
endVal = longLen;
if (longLen < 0)
{
incrementVal = -1;
longLen = -longLen;
}
else incrementVal = 1;
double decInc;
if (longLen == 0) decInc = shortLen;
else decInc = (shortLen/(double) longLen);
double j = 0.0;
if (yLonger)
{
for (int i = 0; i != endVal; i += incrementVal)
{
x = x1 + (int) j;
y = y1 + i;
pixels[y*w + x] = color;
j += decInc;
}
}
else
{
for (int i = 0; i != endVal; i += incrementVal)
{
x = x1 + i;
y = y1 + (int) j;
pixels[y*w + x] = color;
j += decInc;
}
}
break;
case EFLAMode.AddFixed:
yLonger = false;
shortLen = y2 - y1;
longLen = x2 - x1;
if (Math.Abs(shortLen) > Math.Abs(longLen))
{
int swap = shortLen;
shortLen = longLen;
longLen = swap;
yLonger = true;
}
endVal = longLen;
if (longLen < 0)
{
incrementVal = -1;
longLen = -longLen;
}
else incrementVal = 1;
int decIncI = 0;
if (longLen == 0) decInc = 0;
else decIncI = (shortLen << 16)/longLen;
int jI = 0;
if (yLonger)
{
for (int i = 0; i != endVal; i += incrementVal)
{
x = x1 + (jI >> 16);
y = y1 + i;
pixels[y*w + x] = color;
jI += decIncI;
}
}
else
{
for (int i = 0; i != endVal; i += incrementVal)
{
x = x1 + i;
y = y1 + (jI >> 16);
pixels[y*w + x] = color;
jI += decIncI;
}
}
break;
case EFLAMode.AddFixedPreCal:
break;
default:
throw new ArgumentOutOfRangeException("mode");
}
}
bmp.AddDirtyRect(new Int32Rect(0, 0, bmp.PixelWidth, bmp.PixelHeight));
bmp.Unlock();
}
public static void DrawLineEFLA(this WriteableBitmap bmp, int x1, int y1, int x2, int y2, int color, EFLAMode mode)
{
int w = bmp.PixelWidth;
int h = bmp.PixelHeight;
bmp.Lock();
bool yLonger;
int incrementVal, endVal;
int shortLen;
int longLen;
unsafe
{
var pixels = (int *)bmp.BackBuffer;
int x, y;
switch (mode)
{
case EFLAMode.Div:
yLonger = false;
shortLen = y2 - y1;
longLen = x2 - x1;
if (Math.Abs(shortLen) > Math.Abs(longLen))
{
int swap = shortLen;
shortLen = longLen;
longLen = swap;
yLonger = true;
}
if (longLen < 0)
{
incrementVal = -1;
}
else
{
incrementVal = 1;
}
double divDiff;
if (shortLen == 0)
{
divDiff = longLen;
}
else
{
divDiff = longLen / (double)shortLen;
}
if (yLonger)
{
for (int i = 0; i != longLen; i += incrementVal)
{
x = x1 + (int)(i / divDiff);
y = y1 + i;
pixels[y * w + x] = color;
}
}
else
{
for (int i = 0; i != longLen; i += incrementVal)
{
x = x1 + i;
y = y1 + (int)(i / divDiff);
pixels[y * w + x] = color;
}
}
break;
case EFLAMode.Mul:
yLonger = false;
shortLen = y2 - y1;
longLen = x2 - x1;
if (Math.Abs(shortLen) > Math.Abs(longLen))
{
int swap = shortLen;
shortLen = longLen;
longLen = swap;
yLonger = true;
}
if (longLen < 0)
{
incrementVal = -1;
}
else
{
incrementVal = 1;
}
double multDiff;
if (longLen == 0.0)
{
multDiff = shortLen;
}
else
{
multDiff = shortLen / (double)longLen;
}
if (yLonger)
{
for (int i = 0; i != longLen; i += incrementVal)
{
x = x1 + (int)(i * multDiff);
y = y1 + i;
pixels[y * w + x] = color;
}
}
else
{
for (int i = 0; i != longLen; i += incrementVal)
{
x = x1 + i;
y = y1 + (int)(i * multDiff);
pixels[y * w + x] = color;
}
}
break;
case EFLAMode.Add:
yLonger = false;
shortLen = y2 - y1;
longLen = x2 - x1;
if (Math.Abs(shortLen) > Math.Abs(longLen))
{
int swap = shortLen;
shortLen = longLen;
longLen = swap;
yLonger = true;
}
endVal = longLen;
if (longLen < 0)
{
incrementVal = -1;
longLen = -longLen;
}
else
{
incrementVal = 1;
}
double decInc;
if (longLen == 0)
{
decInc = shortLen;
}
else
{
decInc = (shortLen / (double)longLen);
}
double j = 0.0;
if (yLonger)
{
for (int i = 0; i != endVal; i += incrementVal)
{
x = x1 + (int)j;
y = y1 + i;
pixels[y * w + x] = color;
j += decInc;
}
}
else
{
for (int i = 0; i != endVal; i += incrementVal)
{
x = x1 + i;
y = y1 + (int)j;
pixels[y * w + x] = color;
j += decInc;
}
}
break;
case EFLAMode.AddFixed:
yLonger = false;
shortLen = y2 - y1;
longLen = x2 - x1;
if (Math.Abs(shortLen) > Math.Abs(longLen))
{
int swap = shortLen;
shortLen = longLen;
longLen = swap;
yLonger = true;
}
endVal = longLen;
if (longLen < 0)
{
incrementVal = -1;
longLen = -longLen;
}
else
{
incrementVal = 1;
}
int decIncI = 0;
if (longLen == 0)
{
decInc = 0;
}
else
{
decIncI = (shortLen << 16) / longLen;
}
int jI = 0;
if (yLonger)
{
for (int i = 0; i != endVal; i += incrementVal)
{
x = x1 + (jI >> 16);
y = y1 + i;
pixels[y * w + x] = color;
jI += decIncI;
}
}
else
{
for (int i = 0; i != endVal; i += incrementVal)
{
x = x1 + i;
y = y1 + (jI >> 16);
pixels[y * w + x] = color;
jI += decIncI;
}
}
break;
case EFLAMode.AddFixedPreCal:
break;
default:
throw new ArgumentOutOfRangeException("mode");
}
}
bmp.AddDirtyRect(new Int32Rect(0, 0, bmp.PixelWidth, bmp.PixelHeight));
bmp.Unlock();
}
public static void DrawLineEFLA(this WriteableBitmap bmp, int x1, int y1, int x2, int y2, Color color, EFLAMode mode)
{
int a = color.A + 1;
int col = (color.A << 24)
| ((byte)((color.R * a) >> 8) << 16)
| ((byte)((color.G * a) >> 8) << 8)
| ((byte)((color.B * a) >> 8));
DrawLineEFLA(bmp, x1, y1, x2, y2, col, mode);
}
