private void button1_Click(object sender, EventArgs e)
{
//1.
MsdfGenParams msdfGenParams = new MsdfGenParams();
//GlyphImage glyphImg = MsdfGlyphGen.CreateMsdfImage(tx, msdfGenParams);
Msdfgen.Shape shape1 = new Msdfgen.Shape();
//
Msdfgen.Contour cnt = new Msdfgen.Contour();
//cnt.AddLine(0, 0, 50, 0);
//cnt.AddLine(50, 0, 50, 50);
//cnt.AddLine(50, 50, 0, 50);
//cnt.AddLine(0, 50, 0, 0);
//cnt.AddLine(10, 20, 50, 0);
//cnt.AddLine(50, 0, 80, 20);
//cnt.AddLine(80, 20, 50, 60);
//cnt.AddLine(50, 60, 10, 20);
//for msdf we draw shape clock-wise
cnt.AddLine(10, 20, 50, 60);
cnt.AddLine(50, 60, 80, 20);
cnt.AddLine(80, 20, 50, 0);
cnt.AddLine(50, 0, 10, 20);
shape1.contours.Add(cnt);
//
//
var genParams = new MsdfGenParams();
BitmapAtlasItemSource glyphImg = MsdfImageGen.CreateMsdfImageV1(shape1, genParams);
using (Bitmap bmp = new Bitmap(glyphImg.Width, glyphImg.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
{
int[] buffer = glyphImg.GetImageBuffer();
var bmpdata = bmp.LockBits(new System.Drawing.Rectangle(0, 0, glyphImg.Width, glyphImg.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, bmp.PixelFormat);
System.Runtime.InteropServices.Marshal.Copy(buffer, 0, bmpdata.Scan0, buffer.Length);
bmp.UnlockBits(bmpdata);
bmp.Save("msdf_shape.png");
//
}
}
//siged distance field generator
public static void GenerateSdf(FloatBmp output,
Shape shape,
double range,
Vector2 scale,
Vector2 translate)
{
List <Contour> contours = shape.contours;
int contourCount = contours.Count;
int w = output.Width, h = output.Height;
List <int> windings = new List <int>(contourCount);
for (int i = 0; i < contourCount; ++i)
{
windings.Add(contours[i].winding());
}
//# ifdef MSDFGEN_USE_OPENMP
//#pragma omp parallel
//#endif
{
//# ifdef MSDFGEN_USE_OPENMP
//#pragma omp for
//#endif
double[] contourSD = new double[contourCount];
for (int y = 0; y < h; ++y)
{
int row = shape.InverseYAxis ? h - y - 1 : y;
for (int x = 0; x < w; ++x)
{
double dummy = 0;
Vector2 p = (new Vector2(x + .5, y + .5) / scale) - translate;
double negDist = -SignedDistance.INFINITE.distance;
double posDist = SignedDistance.INFINITE.distance;
int winding = 0;
for (int i = 0; i < contourCount; ++i)
{
Contour contour = contours[i];
SignedDistance minDistance = SignedDistance.INFINITE;
List <EdgeHolder> edges = contour.edges;
int edgeCount = edges.Count;
for (int ee = 0; ee < edgeCount; ++ee)
{
EdgeHolder edge = edges[ee];
SignedDistance distance = edge.edgeSegment.signedDistance(p, out dummy);
if (distance < minDistance)
{
minDistance = distance;
}
}
contourSD[i] = minDistance.distance;
if (windings[i] > 0 && minDistance.distance >= 0 && Math.Abs(minDistance.distance) < Math.Abs(posDist))
{
posDist = minDistance.distance;
}
if (windings[i] < 0 && minDistance.distance <= 0 && Math.Abs(minDistance.distance) < Math.Abs(negDist))
{
negDist = minDistance.distance;
}
}
double sd = SignedDistance.INFINITE.distance;
if (posDist >= 0 && Math.Abs(posDist) <= Math.Abs(negDist))
{
sd = posDist;
winding = 1;
for (int i = 0; i < contourCount; ++i)
{
if (windings[i] > 0 && contourSD[i] > sd && Math.Abs(contourSD[i]) < Math.Abs(negDist))
{
sd = contourSD[i];
}
}
}
else if (negDist <= 0 && Math.Abs(negDist) <= Math.Abs(posDist))
{
sd = negDist;
winding = -1;
for (int i = 0; i < contourCount; ++i)
{
if (windings[i] < 0 && contourSD[i] < sd && Math.Abs(contourSD[i]) < Math.Abs(posDist))
{
sd = contourSD[i];
}
}
}
for (int i = 0; i < contourCount; ++i)
{
if (windings[i] != winding && Math.Abs(contourSD[i]) < Math.Abs(sd))
{
sd = contourSD[i];
}
}
output.SetPixel(x, row, (float)(sd / range + .5));
}
}
}
}
public static void generateMSDF(FloatRGBBmp output, Shape shape, double range, Vector2 scale, Vector2 translate, double edgeThreshold)
{
List <Contour> contours = shape.contours;
int contourCount = contours.Count;
int w = output.Width;
int h = output.Height;
List <int> windings = new List <int>(contourCount);
for (int i = 0; i < contourCount; ++i)
{
windings.Add(contours[i].winding());
}
var contourSD = new MultiDistance[contourCount];
for (int y = 0; y < h; ++y)
{
int row = shape.InverseYAxis ? h - y - 1 : y;
for (int x = 0; x < w; ++x)
{
Vector2 p = (new Vector2(x + .5, y + .5) / scale) - translate;
EdgePoint sr = new EdgePoint {
minDistance = SignedDistance.INFINITE
},
sg = new EdgePoint {
minDistance = SignedDistance.INFINITE
},
sb = new EdgePoint {
minDistance = SignedDistance.INFINITE
};
double d = Math.Abs(SignedDistance.INFINITE.distance);
double negDist = -Math.Abs(SignedDistance.INFINITE.distance);
double posDist = Math.Abs(SignedDistance.INFINITE.distance);
int winding = 0;
for (int n = 0; n < contourCount; ++n)
{
//for-each contour
Contour contour = contours[n];
List <EdgeHolder> edges = contour.edges;
int edgeCount = edges.Count;
EdgePoint r = new EdgePoint {
minDistance = SignedDistance.INFINITE
},
g = new EdgePoint {
minDistance = SignedDistance.INFINITE
},
b = new EdgePoint {
minDistance = SignedDistance.INFINITE
};
for (int ee = 0; ee < edgeCount; ++ee)
{
EdgeHolder edge = edges[ee];
double param;
SignedDistance distance = edge.edgeSegment.signedDistance(p, out param);
if (edge.HasComponent(EdgeColor.RED) && distance < r.minDistance)
{
r.minDistance = distance;
r.nearEdge = edge;
r.nearParam = param;
}
if (edge.HasComponent(EdgeColor.GREEN) && distance < g.minDistance)
{
g.minDistance = distance;
g.nearEdge = edge;
g.nearParam = param;
}
if (edge.HasComponent(EdgeColor.BLUE) && distance < b.minDistance)
{
b.minDistance = distance;
b.nearEdge = edge;
b.nearParam = param;
}
}
//----------------
if (r.minDistance < sr.minDistance)
{
sr = r;
}
if (g.minDistance < sg.minDistance)
{
sg = g;
}
if (b.minDistance < sb.minDistance)
{
sb = b;
}
//----------------
double medMinDistance = Math.Abs(median(r.minDistance.distance, g.minDistance.distance, b.minDistance.distance));
if (medMinDistance < d)
{
d = medMinDistance;
winding = -windings[n];
}
if (r.nearEdge != null)
{
r.nearEdge.edgeSegment.distanceToPseudoDistance(ref r.minDistance, p, r.nearParam);
}
if (g.nearEdge != null)
{
g.nearEdge.edgeSegment.distanceToPseudoDistance(ref g.minDistance, p, g.nearParam);
}
if (b.nearEdge != null)
{
b.nearEdge.edgeSegment.distanceToPseudoDistance(ref b.minDistance, p, b.nearParam);
}
//--------------
medMinDistance = median(r.minDistance.distance, g.minDistance.distance, b.minDistance.distance);
contourSD[n].r = r.minDistance.distance;
contourSD[n].g = g.minDistance.distance;
contourSD[n].b = b.minDistance.distance;
contourSD[n].med = medMinDistance;
if (windings[n] > 0 && medMinDistance >= 0 && Math.Abs(medMinDistance) < Math.Abs(posDist))
{
posDist = medMinDistance;
}
if (windings[n] < 0 && medMinDistance <= 0 && Math.Abs(medMinDistance) < Math.Abs(negDist))
{
negDist = medMinDistance;
}
}
if (sr.nearEdge != null)
{
sr.nearEdge.edgeSegment.distanceToPseudoDistance(ref sr.minDistance, p, sr.nearParam);
}
if (sg.nearEdge != null)
{
sg.nearEdge.edgeSegment.distanceToPseudoDistance(ref sg.minDistance, p, sg.nearParam);
}
if (sb.nearEdge != null)
{
sb.nearEdge.edgeSegment.distanceToPseudoDistance(ref sb.minDistance, p, sb.nearParam);
}
MultiDistance msd;
msd.r = msd.g = msd.b = msd.med = SignedDistance.INFINITE.distance;
if (posDist >= 0 && Math.Abs(posDist) <= Math.Abs(negDist))
{
msd.med = SignedDistance.INFINITE.distance;
winding = 1;
for (int i = 0; i < contourCount; ++i)
{
if (windings[i] > 0 && contourSD[i].med > msd.med && Math.Abs(contourSD[i].med) < Math.Abs(negDist))
{
msd = contourSD[i];
}
}
}
else if (negDist <= 0 && Math.Abs(negDist) <= Math.Abs(posDist))
{
msd.med = -SignedDistance.INFINITE.distance;
winding = -1;
for (int i = 0; i < contourCount; ++i)
{
if (windings[i] < 0 && contourSD[i].med < msd.med && Math.Abs(contourSD[i].med) < Math.Abs(posDist))
{
msd = contourSD[i];
}
}
}
for (int i = 0; i < contourCount; ++i)
{
if (windings[i] != winding && Math.Abs(contourSD[i].med) < Math.Abs(msd.med))
{
msd = contourSD[i];
}
}
if (median(sr.minDistance.distance, sg.minDistance.distance, sb.minDistance.distance) == msd.med)
{
msd.r = sr.minDistance.distance;
msd.g = sg.minDistance.distance;
msd.b = sb.minDistance.distance;
}
output.SetPixel(x, row,
new FloatRGB(
(float)(msd.r / range + .5),
(float)(msd.g / range + .5),
(float)(msd.b / range + .5)
));
}
}
if (edgeThreshold > 0)
{
msdfErrorCorrection(output, edgeThreshold / (scale * range));
}
}
public static void generateMSDF_legacy(FloatRGBBmp output, Shape shape, double range, Vector2 scale, Vector2 translate,
double edgeThreshold)
{
int w = output.Width;
int h = output.Height;
//#ifdef MSDFGEN_USE_OPENMP
// #pragma omp parallel for
//#endif
for (int y = 0; y < h; ++y)
{
int row = shape.InverseYAxis ? h - y - 1 : y;
for (int x = 0; x < w; ++x)
{
Vector2 p = (new Vector2(x + .5, y + .5) / scale) - translate;
EdgePoint r = new EdgePoint {
minDistance = SignedDistance.INFINITE
},
g = new EdgePoint {
minDistance = SignedDistance.INFINITE
},
b = new EdgePoint {
minDistance = SignedDistance.INFINITE
};
//r.nearEdge = g.nearEdge = b.nearEdge = null;
//r.nearParam = g.nearParam = b.nearParam = 0;
List <Contour> contours = shape.contours;
int m = contours.Count;
for (int n = 0; n < m; ++n)
{
Contour contour = contours[n];
List <EdgeHolder> edges = contour.edges;
int j = edges.Count;
for (int i = 0; i < j; ++i)
{
EdgeHolder edge = edges[i];
double param;
SignedDistance distance = edge.edgeSegment.signedDistance(p, out param);
if (edge.HasComponent(EdgeColor.RED) && distance < r.minDistance)
{
r.minDistance = distance;
r.nearEdge = edge;
r.nearParam = param;
}
if (edge.HasComponent(EdgeColor.GREEN) && distance < g.minDistance)
{
g.minDistance = distance;
g.nearEdge = edge;
g.nearParam = param;
}
if (edge.HasComponent(EdgeColor.BLUE) && distance < b.minDistance)
{
b.minDistance = distance;
b.nearEdge = edge;
b.nearParam = param;
}
}
if (r.nearEdge != null)
{
r.nearEdge.edgeSegment.distanceToPseudoDistance(ref r.minDistance, p, r.nearParam);
}
if (g.nearEdge != null)
{
g.nearEdge.edgeSegment.distanceToPseudoDistance(ref g.minDistance, p, g.nearParam);
}
if (b.nearEdge != null)
{
b.nearEdge.edgeSegment.distanceToPseudoDistance(ref b.minDistance, p, b.nearParam);
}
output.SetPixel(x, row,
new FloatRGB(
(float)(r.minDistance.distance / range + .5),
(float)(g.minDistance.distance / range + .5),
(float)(b.minDistance.distance / range + .5)
));
}
}
}
if (edgeThreshold > 0)
{
msdfErrorCorrection(output, edgeThreshold / (scale * range));
}
}
static Shape CreateShape(VertexStore vxs, out EdgeBmpLut bmpLut)
{
List <EdgeSegment> flattenEdges = new List <EdgeSegment>();
Shape shape = new Shape(); //start with blank shape
int i = 0;
double x, y;
VertexCmd cmd;
Contour cnt = null;
double latestMoveToX = 0;
double latestMoveToY = 0;
double latestX = 0;
double latestY = 0;
List <ContourCorner> corners = new List <ContourCorner>();
List <int> edgeOfNextContours = new List <int>();
List <int> cornerOfNextContours = new List <int>();
while ((cmd = vxs.GetVertex(i, out x, out y)) != VertexCmd.NoMore)
{
switch (cmd)
{
case VertexCmd.Close:
{
//close current cnt
if ((latestMoveToX != latestX) ||
(latestMoveToY != latestY))
{
//add line to close the shape
if (cnt != null)
{
flattenEdges.Add(cnt.AddLine(latestX, latestY, latestMoveToX, latestMoveToY));
}
}
if (cnt != null)
{
//***
CreateCorners(cnt, corners);
edgeOfNextContours.Add(flattenEdges.Count);
cornerOfNextContours.Add(corners.Count);
shape.contours.Add(cnt);
//***
cnt = null;
}
}
break;
case VertexCmd.C3:
{
//C3 curve (Quadratic)
if (cnt == null)
{
cnt = new Contour();
}
VertexCmd cmd1 = vxs.GetVertex(i + 1, out double x1, out double y1);
i++;
if (cmd1 != VertexCmd.LineTo)
{
throw new NotSupportedException();
}
//in this version,
//we convert Quadratic to Cubic (https://stackoverflow.com/questions/9485788/convert-quadratic-curve-to-cubic-curve)
//Control1X = StartX + ((2f/3) * (ControlX - StartX))
//Control2X = EndX + ((2f/3) * (ControlX - EndX))
//flattenEdges.Add(cnt.AddCubicSegment(
// latestX, latestY,
// ((2f / 3) * (x - latestX)) + latestX, ((2f / 3) * (y - latestY)) + latestY,
// ((2f / 3) * (x - x1)) + x1, ((2f / 3) * (y - y1)) + y1,
// x1, y1));
flattenEdges.Add(cnt.AddQuadraticSegment(latestX, latestY, x, y, x1, y1));
latestX = x1;
latestY = y1;
}
break;
case VertexCmd.C4:
{
//C4 curve (Cubic)
if (cnt == null)
{
cnt = new Contour();
}
VertexCmd cmd1 = vxs.GetVertex(i + 1, out double x2, out double y2);
VertexCmd cmd2 = vxs.GetVertex(i + 2, out double x3, out double y3);
i += 2;
if (cmd1 != VertexCmd.C4 || cmd2 != VertexCmd.LineTo)
{
throw new NotSupportedException();
}
flattenEdges.Add(cnt.AddCubicSegment(latestX, latestY, x, y, x2, y2, x3, y3));
latestX = x3;
latestY = y3;
}
break;
case VertexCmd.LineTo:
{
if (cnt == null)
{
cnt = new Contour();
}
LinearSegment lineseg = cnt.AddLine(latestX, latestY, x, y);
flattenEdges.Add(lineseg);
latestX = x;
latestY = y;
}
break;
case VertexCmd.MoveTo:
{
latestX = latestMoveToX = x;
latestY = latestMoveToY = y;
if (cnt != null)
{
shape.contours.Add(cnt);
cnt = null;
}
}
break;
}
i++;
}
if (cnt != null)
{
shape.contours.Add(cnt);
CreateCorners(cnt, corners);
edgeOfNextContours.Add(flattenEdges.Count);
cornerOfNextContours.Add(corners.Count);
cnt = null;
}
GroupingOverlapContours(shape);
//from a given shape we create a corner-arm for each corner
bmpLut = new EdgeBmpLut(corners, flattenEdges, edgeOfNextContours, cornerOfNextContours);
return(shape);
}
