/// <summary>
/// Find the first intercept between two glyph bounding boxes
/// </summary>
/// <param name="charSet">The character set to test</param>
/// <returns>The overlapping characters</returns>
private static char[] FirstIntercept(Dictionary <char, QFontGlyph> charSet)
{
char[] keys = Helper.ToArray(charSet.Keys);
for (int i = 0; i < keys.Length; i++)
{
for (int j = i + 1; j < keys.Length; j++)
{
if (charSet[keys[i]].Page == charSet[keys[j]].Page && RectangleIntersect(charSet[keys[i]].Rect, charSet[keys[j]].Rect))
{
return(new[] { keys[i], keys[j] });
}
}
}
return(null);
}
public static QFontData LoadQFontDataFromFile(string filePath, float downSampleFactor, QFontConfiguration loaderConfig)
{
var lines = new List <String>();
StreamReader reader = new StreamReader(filePath);
string line;
while ((line = reader.ReadLine()) != null)
{
lines.Add(line);
}
reader.Close();
var data = new QFontData();
int pageCount = 0;
char[] charSet;
data.Deserialize(lines, out pageCount, out charSet);
string namePrefix = filePath.Replace(".qfont", "").Replace(" ", "");
var bitmapPages = new List <QBitmap>();
if (pageCount == 1)
{
bitmapPages.Add(new QBitmap(namePrefix + ".png"));
}
else
{
for (int i = 0; i < pageCount; i++)
{
bitmapPages.Add(new QBitmap(namePrefix + "_sheet_" + i));
}
}
foreach (var glyph in data.CharSetMapping.Values)
{
RetargetGlyphRectangleOutwards(bitmapPages[glyph.page].bitmapData, glyph, false, loaderConfig.KerningConfig.alphaEmptyPixelTolerance);
}
var intercept = FirstIntercept(data.CharSetMapping);
if (intercept != null)
{
throw new Exception("Failed to load font from file. Glyphs '" + intercept[0] + "' and '" + intercept[1] + "' were overlapping. If you are texturing your font without locking pixel opacity, then consider using a larger glyph margin. This can be done by setting QFontBuilderConfiguration myQfontBuilderConfig.GlyphMargin, and passing it into CreateTextureFontFiles.");
}
if (downSampleFactor > 1.0f)
{
foreach (var page in bitmapPages)
{
page.DownScale32((int)(page.bitmap.Width * downSampleFactor), (int)(page.bitmap.Height * downSampleFactor));
}
foreach (var glyph in data.CharSetMapping.Values)
{
glyph.rect = new Rectangle((int)(glyph.rect.X * downSampleFactor),
(int)(glyph.rect.Y * downSampleFactor),
(int)(glyph.rect.Width * downSampleFactor),
(int)(glyph.rect.Height * downSampleFactor));
glyph.yOffset = (int)(glyph.yOffset * downSampleFactor);
}
}
else if (downSampleFactor < 1.0f)
{
// If we were simply to shrink the entire texture, then at some point we will make glyphs overlap, breaking the font.
// For this reason it is necessary to copy every glyph to a separate bitmap, and then shrink each bitmap individually.
QFontGlyph[] shrunkGlyphs;
QBitmap[] shrunkBitmapsPerGlyph;
CreateBitmapPerGlyph(Helper.ToArray(data.CharSetMapping.Values), bitmapPages.ToArray(), out shrunkGlyphs, out shrunkBitmapsPerGlyph);
//shrink each bitmap
for (int i = 0; i < shrunkGlyphs.Length; i++)
{
var bmp = shrunkBitmapsPerGlyph[i];
bmp.DownScale32(Math.Max((int)(bmp.bitmap.Width * downSampleFactor), 1), Math.Max((int)(bmp.bitmap.Height * downSampleFactor), 1));
shrunkGlyphs[i].rect = new Rectangle(0, 0, bmp.bitmap.Width, bmp.bitmap.Height);
shrunkGlyphs[i].yOffset = (int)(shrunkGlyphs[i].yOffset * downSampleFactor);
}
var shrunkBitmapData = new BitmapData[shrunkBitmapsPerGlyph.Length];
for (int i = 0; i < shrunkBitmapsPerGlyph.Length; i++)
{
shrunkBitmapData[i] = shrunkBitmapsPerGlyph[i].bitmapData;
}
//use roughly the same number of pages as before..
int newWidth = (int)(bitmapPages[0].bitmap.Width * (0.1f + downSampleFactor));
int newHeight = (int)(bitmapPages[0].bitmap.Height * (0.1f + downSampleFactor));
//free old bitmap pages since we are about to chuck them away
for (int i = 0; i < pageCount; i++)
{
bitmapPages[i].Free();
}
QFontGlyph[] shrunkRepackedGlyphs;
bitmapPages = GenerateBitmapSheetsAndRepack(shrunkGlyphs, shrunkBitmapData, newWidth, newHeight, out shrunkRepackedGlyphs, 4);
data.CharSetMapping = CreateCharGlyphMapping(shrunkRepackedGlyphs);
foreach (var bmp in shrunkBitmapsPerGlyph)
{
bmp.Free();
}
pageCount = bitmapPages.Count;
}
data.Pages = new TexturePage[pageCount];
for (int i = 0; i < pageCount; i++)
{
data.Pages[i] = new TexturePage(bitmapPages[i].bitmapData);
}
if (downSampleFactor != 1.0f)
{
foreach (var glyph in data.CharSetMapping.Values)
{
RetargetGlyphRectangleOutwards(bitmapPages[glyph.page].bitmapData, glyph, false, loaderConfig.KerningConfig.alphaEmptyPixelTolerance);
}
intercept = FirstIntercept(data.CharSetMapping);
if (intercept != null)
{
throw new Exception("Failed to load font from file. Glyphs '" + intercept[0] + "' and '" + intercept[1] + "' were overlapping. This occurred only after resizing your texture font, implying that there is a bug in QFont. ");
}
}
var glyphList = new List <QFontGlyph>();
foreach (var c in charSet)
{
glyphList.Add(data.CharSetMapping[c]);
}
if (loaderConfig.ShadowConfig != null)
{
data.dropShadowFont = BuildDropShadow(bitmapPages, glyphList.ToArray(), loaderConfig.ShadowConfig, Helper.ToArray(charSet), loaderConfig.KerningConfig.alphaEmptyPixelTolerance);
}
data.KerningPairs = KerningCalculator.CalculateKerning(Helper.ToArray(charSet), glyphList.ToArray(), bitmapPages, loaderConfig.KerningConfig);
data.CalculateMeanWidth();
data.CalculateMaxHeight();
for (int i = 0; i < pageCount; i++)
{
bitmapPages[i].Free();
}
return(data);
}