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; } }