public static void CreateBitmapPerGlyph(GLFontGlyph[] sourceGlyphs, GLFontBitmap[] sourceBitmaps, out GLFontGlyph[] destGlyphs, out GLFontBitmap[] destBitmaps)
{
destBitmaps = new GLFontBitmap[sourceGlyphs.Length];
destGlyphs = new GLFontGlyph[sourceGlyphs.Length];
for (int i = 0; i < sourceGlyphs.Length; i++)
{
var sg = sourceGlyphs[i];
destGlyphs[i] = new GLFontGlyph(i, new Rectangle(0, 0, sg.Rect.Width, sg.Rect.Height), sg.YOffset, sg.Character);
destBitmaps[i] = new GLFontBitmap(new Bitmap(sg.Rect.Width, sg.Rect.Height, PixelFormat.Format32bppArgb));
GLFontBitmap.Blit(sourceBitmaps[sg.Page].bitmapData, destBitmaps[i].bitmapData, sg.Rect, 0, 0);
}
}
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 List <GLFontBitmap> GenerateBitmapSheetsAndRepack(GLFontGlyph[] sourceGlyphs, BitmapData[] sourceBitmaps, int destSheetWidth, int destSheetHeight, out GLFontGlyph[] destGlyphs, int destMargin, bool usePowerOfTwo)
{
var pages = new List <GLFontBitmap>();
destGlyphs = new GLFontGlyph[sourceGlyphs.Length];
GLFontBitmap currentPage = null;
int maxY = sourceGlyphs.Max(g => g.Rect.Height);
int finalPageIndex = 0;
int finalPageRequiredWidth = 0;
int finalPageRequiredHeight = 0;
for (int k = 0; k < 2; k++)
{
bool pre = k == 0; //first iteration is simply to determine the required size of the final page, so that we can crop it in advance
int xPos = 0;
int yPos = 0;
int maxYInRow = 0;
int totalTries = 0;
for (int i = 0; i < sourceGlyphs.Length; i++)
{
if (!pre && currentPage == null)
{
if (finalPageIndex == pages.Count)
{
int width = Math.Min(destSheetWidth, usePowerOfTwo ? PowerOfTwo(finalPageRequiredWidth) : finalPageRequiredWidth);
int height = Math.Min(destSheetHeight, usePowerOfTwo ? PowerOfTwo(finalPageRequiredHeight) : finalPageRequiredHeight);
currentPage = new GLFontBitmap(new Bitmap(width, height, PixelFormat.Format32bppArgb));
currentPage.Clear32(255, 255, 255, 0); // clear to white, but totally transparent
}
else
{
currentPage = new GLFontBitmap(new Bitmap(destSheetWidth, destSheetHeight, PixelFormat.Format32bppArgb));
currentPage.Clear32(255, 255, 255, 0); // clear to white, but totally transparent
}
pages.Add(currentPage);
}
totalTries++;
if (totalTries > 10 * sourceGlyphs.Length)
{
throw new Exception("Failed to fit font into texture pages");
}
var rect = sourceGlyphs[i].Rect;
if (xPos + rect.Width + 2 * destMargin <= destSheetWidth && yPos + rect.Height + 2 * destMargin <= destSheetHeight)
{
if (!pre)
{
//add to page
if (sourceBitmaps[sourceGlyphs[i].Page].PixelFormat == PixelFormat.Format32bppArgb)
{
GLFontBitmap.Blit(sourceBitmaps[sourceGlyphs[i].Page], currentPage.bitmapData, rect.X, rect.Y, rect.Width, rect.Height, xPos + destMargin, yPos + destMargin);
}
else
{
GLFontBitmap.BlitMask(sourceBitmaps[sourceGlyphs[i].Page], currentPage.bitmapData, rect.X, rect.Y, rect.Width, rect.Height, xPos + destMargin, yPos + destMargin);
}
destGlyphs[i] = new GLFontGlyph(pages.Count - 1, new Rectangle(xPos + destMargin, yPos + destMargin, rect.Width, rect.Height), sourceGlyphs[i].YOffset, sourceGlyphs[i].Character);
}
else
{
finalPageRequiredWidth = Math.Max(finalPageRequiredWidth, xPos + rect.Width + 2 * destMargin);
finalPageRequiredHeight = Math.Max(finalPageRequiredHeight, yPos + rect.Height + 2 * destMargin);
}
xPos += rect.Width + 2 * destMargin;
maxYInRow = Math.Max(maxYInRow, rect.Height);
continue;
}
if (xPos + rect.Width + 2 * destMargin > destSheetWidth)
{
i--;
yPos += maxYInRow + 2 * destMargin;
xPos = 0;
if (yPos + maxY + 2 * destMargin > destSheetHeight)
{
yPos = 0;
if (!pre)
{
currentPage = null;
}
else
{
finalPageRequiredWidth = 0;
finalPageRequiredHeight = 0;
finalPageIndex++;
}
}
continue;
}
}
}
return(pages);
}
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;
}
}
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;
}
}
public void DownScale32(int newWidth, int newHeight)
{
GLFontBitmap newBitmap = new GLFontBitmap(new Bitmap(newWidth, newHeight, bitmap.PixelFormat));
if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
{
throw new Exception("DownsScale32 only works on 32 bit images");
}
float xscale = (float)bitmapData.Width / newWidth;
float yscale = (float)bitmapData.Height / newHeight;
byte r = 0, g = 0, b = 0, a = 0;
float summedR = 0f;
float summedG = 0f;
float summedB = 0f;
float summedA = 0f;
int left, right, top, bottom; //the area of old pixels covered by the new bitmap
float targetStartX, targetEndX;
float targetStartY, targetEndY;
float leftF, rightF, topF, bottomF; //edges of new pixel in old pixel coords
float weight;
float weightScale = xscale * yscale;
float totalColourWeight = 0f;
for (int m = 0; m < newHeight; m++)
{
for (int n = 0; n < newWidth; n++)
{
leftF = n * xscale;
rightF = (n + 1) * xscale;
topF = m * yscale;
bottomF = (m + 1) * yscale;
left = (int)leftF;
right = (int)rightF;
top = (int)topF;
bottom = (int)bottomF;
if (left < 0)
{
left = 0;
}
if (top < 0)
{
top = 0;
}
if (right >= bitmapData.Width)
{
right = bitmapData.Width - 1;
}
if (bottom >= bitmapData.Height)
{
bottom = bitmapData.Height - 1;
}
summedR = 0f;
summedG = 0f;
summedB = 0f;
summedA = 0f;
totalColourWeight = 0f;
for (int j = top; j <= bottom; j++)
{
for (int i = left; i <= right; i++)
{
targetStartX = Math.Max(leftF, i);
targetEndX = Math.Min(rightF, i + 1);
targetStartY = Math.Max(topF, j);
targetEndY = Math.Min(bottomF, j + 1);
weight = (targetEndX - targetStartX) * (targetEndY - targetStartY);
GetPixel32(i, j, ref r, ref g, ref b, ref a);
summedA += weight * a;
if (a != 0)
{
summedR += weight * r;
summedG += weight * g;
summedB += weight * b;
totalColourWeight += weight;
}
}
}
summedR /= totalColourWeight;
summedG /= totalColourWeight;
summedB /= totalColourWeight;
summedA /= weightScale;
if (summedR < 0)
{
summedR = 0f;
}
if (summedG < 0)
{
summedG = 0f;
}
if (summedB < 0)
{
summedB = 0f;
}
if (summedA < 0)
{
summedA = 0f;
}
if (summedR >= 256)
{
summedR = 255;
}
if (summedG >= 256)
{
summedG = 255;
}
if (summedB >= 256)
{
summedB = 255;
}
if (summedA >= 256)
{
summedA = 255;
}
newBitmap.PutPixel32(n, m, (byte)summedR, (byte)summedG, (byte)summedB, (byte)summedA);
}
}
this.Free();
this.bitmap = newBitmap.bitmap;
this.bitmapData = newBitmap.bitmapData;
}
