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);
}
}
//The initial bitmap is simply a long thin strip of all glyphs in a row
private Bitmap CreateInitialBitmap(Font font, SizeF maxSize, int initialMargin, out GLFontGlyph[] glyphs, GLFontRenderHint renderHint)
{
glyphs = new GLFontGlyph[charSet.Length];
int spacing = (int)Math.Ceiling(maxSize.Width) + 2 * initialMargin;
Bitmap bmp = new Bitmap(spacing * charSet.Length, (int)Math.Ceiling(maxSize.Height) + 2 * initialMargin + 1, PixelFormat.Format24bppRgb);
Graphics graph = Graphics.FromImage(bmp);
switch (renderHint)
{
case GLFontRenderHint.SizeDependent:
graph.TextRenderingHint = font.Size <= 12.0f ? TextRenderingHint.ClearTypeGridFit : TextRenderingHint.AntiAlias;
break;
case GLFontRenderHint.AntiAlias:
graph.TextRenderingHint = TextRenderingHint.AntiAlias;
break;
case GLFontRenderHint.AntiAliasGridFit:
graph.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
break;
case GLFontRenderHint.ClearTypeGridFit:
graph.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;
break;
case GLFontRenderHint.SystemDefault:
graph.TextRenderingHint = TextRenderingHint.SystemDefault;
break;
}
int xOffset = initialMargin;
for (int i = 0; i < charSet.Length; i++)
{
graph.DrawString("" + charSet[i], font, Brushes.White, xOffset, initialMargin);
var charSize = graph.MeasureString("" + charSet[i], font);
glyphs[i] = new GLFontGlyph(0, new Rectangle(xOffset - initialMargin, 0, (int)charSize.Width + initialMargin * 2, (int)charSize.Height + initialMargin * 2), 0, charSet[i]);
xOffset += (int)charSize.Width + initialMargin * 2;
}
graph.Flush();
graph.Dispose();
return(bmp);
}
private static int Kerning(GLFontGlyph g1, GLFontGlyph g2, XLimits[] lim1, XLimits[] lim2, GLFontKerningConfiguration config)
{
int yOffset1 = g1.YOffset;
int yOffset2 = g2.YOffset;
int startY = Math.Max(yOffset1, yOffset2);
int endY = Math.Min(g1.Rect.Height + yOffset1, g2.Rect.Height + yOffset2);
int w1 = g1.Rect.Width;
int worstCase = w1;
//TODO - offset startY, endY by yOffset1 so that lim1[j-yOffset1] can be written as lim1[j], will need another var for yOffset2
for (int j = startY; j < endY; j++)
{
worstCase = Math.Min(worstCase, w1 - lim1[j - yOffset1].Max + lim2[j - yOffset2].Min);
}
worstCase = Math.Min(worstCase, g1.Rect.Width);
worstCase = Math.Min(worstCase, g2.Rect.Width);
//modify by character kerning rules
GLFontCharacterKerningRule kerningRule = config.GetOverridingCharacterKerningRuleForPair("" + g1.Character + g2.Character);
if (kerningRule == GLFontCharacterKerningRule.Zero)
{
return(0);
}
else if (kerningRule == GLFontCharacterKerningRule.NotMoreThanHalf)
{
return((int)Math.Min(Math.Min(g1.Rect.Width, g2.Rect.Width) * 0.5f, worstCase));
}
return(worstCase);
}
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;
}
}