private static void RetargetGlyphRectangleOutwards(BitmapData bitmapData, GLFontGlyph glyph, bool setYOffset, byte alphaTolerance)
{
int startX, endX;
int startY, endY;
var rect = glyph.Rect;
EmptyDel emptyPix;
if (bitmapData.PixelFormat == PixelFormat.Format32bppArgb)
{
emptyPix = delegate(BitmapData data, int x, int y) { return(GLFontBitmap.EmptyAlphaPixel(data, x, y, alphaTolerance)); }
}
;
else
{
emptyPix = delegate(BitmapData data, int x, int y) { return(GLFontBitmap.EmptyPixel(data, x, y)); }
};
unsafe
{
for (startX = rect.X; startX >= 0; startX--)
{
bool foundPix = false;
for (int j = rect.Y; j <= rect.Y + rect.Height; j++)
{
if (!emptyPix(bitmapData, startX, j))
{
foundPix = true;
break;
}
}
if (foundPix)
{
startX++;
break;
}
}
for (endX = rect.X + rect.Width; endX < bitmapData.Width; endX++)
{
bool foundPix = false;
for (int j = rect.Y; j <= rect.Y + rect.Height; j++)
{
if (!emptyPix(bitmapData, endX, j))
{
foundPix = true;
break;
}
}
if (foundPix)
{
endX--;
break;
}
}
for (startY = rect.Y; startY >= 0; startY--)
{
bool foundPix = false;
for (int i = startX; i <= endX; i++)
{
if (!emptyPix(bitmapData, i, startY))
{
foundPix = true;
break;
}
}
if (foundPix)
{
startY++;
break;
}
}
for (endY = rect.Y + rect.Height; endY < bitmapData.Height; endY++)
{
bool foundPix = false;
for (int i = startX; i <= endX; i++)
{
if (!emptyPix(bitmapData, i, endY))
{
foundPix = true;
break;
}
}
if (foundPix)
{
endY--;
break;
}
}
}
glyph.Rect = new Rectangle(startX, startY, endX - startX + 1, endY - startY + 1);
if (setYOffset)
{
glyph.YOffset = glyph.Rect.Y;
}
}
public static Dictionary <String, int> CalculateKerning(char[] charSet, GLFontGlyph[] glyphs, List <GLFontBitmap> bitmapPages, GLFontKerningConfiguration config)
{
var kerningPairs = new Dictionary <String, int>();
//we start by computing the index of the first and last non-empty pixel in each row of each glyph
XLimits[][] limits = new XLimits[charSet.Length][];
int maxHeight = 0;
for (int n = 0; n < charSet.Length; n++)
{
var rect = glyphs[n].Rect;
var page = bitmapPages[glyphs[n].Page];
limits[n] = new XLimits[rect.Height];
maxHeight = Math.Max(rect.Height, maxHeight);
int yStart = rect.Y;
int yEnd = rect.Y + rect.Height;
int xStart = rect.X;
int xEnd = rect.X + rect.Width;
for (int j = yStart; j < yEnd; j++)
{
int last = xStart;
bool yetToFindFirst = true;
for (int i = xStart; i < xEnd; i++)
{
if (!GLFontBitmap.EmptyAlphaPixel(page.bitmapData, i, j, config.AlphaEmptyPixelTolerance))
{
if (yetToFindFirst)
{
limits[n][j - yStart].Min = i - xStart;
yetToFindFirst = false;
}
last = i;
}
}
limits[n][j - yStart].Max = last - xStart;
if (yetToFindFirst)
{
limits[n][j - yStart].Min = xEnd - 1;
}
}
}
//we now bring up each row to the max (or min) of it's two adjacent rows, this is to stop glyphs sliding together too closely
var tmp = new XLimits[maxHeight];
for (int n = 0; n < charSet.Length; n++)
{
//clear tmp
for (int j = 0; j < limits[n].Length; j++)
{
tmp[j] = limits[n][j];
}
for (int j = 0; j < limits[n].Length; j++)
{
if (j != 0)
{
tmp[j].Min = Math.Min(limits[n][j - 1].Min, tmp[j].Min);
tmp[j].Max = Math.Max(limits[n][j - 1].Max, tmp[j].Max);
}
if (j != limits[n].Length - 1)
{
tmp[j].Min = Math.Min(limits[n][j + 1].Min, tmp[j].Min);
tmp[j].Max = Math.Max(limits[n][j + 1].Max, tmp[j].Max);
}
}
for (int j = 0; j < limits[n].Length; j++)
{
limits[n][j] = tmp[j];
}
}
for (int i = 0; i < charSet.Length; i++)
{
for (int j = 0; j < charSet.Length; j++)
{
kerningPairs.Add("" + charSet[i] + charSet[j], 1 - Kerning(glyphs[i], glyphs[j], limits[i], limits[j], config));
}
}
return(kerningPairs);
}
private static void RetargetGlyphRectangleInwards(BitmapData bitmapData, GLFontGlyph glyph, bool setYOffset, byte alphaTolerance)
{
int startX, endX;
int startY, endY;
var rect = glyph.Rect;
EmptyDel emptyPix;
if (bitmapData.PixelFormat == PixelFormat.Format32bppArgb)
{
emptyPix = delegate(BitmapData data, int x, int y) { return(GLFontBitmap.EmptyAlphaPixel(data, x, y, alphaTolerance)); }
}
;
else
{
emptyPix = delegate(BitmapData data, int x, int y) { return(GLFontBitmap.EmptyPixel(data, x, y)); }
};
unsafe
{
for (startX = rect.X; startX < bitmapData.Width; startX++)
{
for (int j = rect.Y; j < rect.Y + rect.Height; j++)
{
if (!emptyPix(bitmapData, startX, j))
{
goto Done1;
}
}
}
Done1:
for (endX = rect.X + rect.Width - 1; endX >= 0; endX--)
{
for (int j = rect.Y; j < rect.Y + rect.Height; j++)
{
if (!emptyPix(bitmapData, endX, j))
{
goto Done2;
}
}
}
Done2:
for (startY = rect.Y; startY < bitmapData.Height; startY++)
{
for (int i = startX; i < endX; i++)
{
if (!emptyPix(bitmapData, i, startY))
{
goto Done3;
}
}
}
Done3:
for (endY = rect.Y + rect.Height - 1; endY >= 0; endY--)
{
for (int i = startX; i < endX; i++)
{
if (!emptyPix(bitmapData, i, endY))
{
goto Done4;
}
}
}
Done4 :;
}
if (endY < startY)
{
startY = endY = rect.Y;
}
if (endX < startX)
{
startX = endX = rect.X;
}
glyph.Rect = new Rectangle(startX, startY, endX - startX + 1, endY - startY + 1);
if (setYOffset)
{
glyph.YOffset = glyph.Rect.Y;
}
}