public static void Crop(Glyph glyph)
{
// Crop the top.
while ((glyph.Subrect.Height > 1) && BitmapUtils.IsAlphaEntirely(0, glyph.Bitmap, new Rectangle(glyph.Subrect.X, glyph.Subrect.Y, glyph.Subrect.Width, 1)))
{
glyph.Subrect.Y++;
glyph.Subrect.Height--;
glyph.YOffset++;
}
// Crop the bottom.
while ((glyph.Subrect.Height > 1) && BitmapUtils.IsAlphaEntirely(0, glyph.Bitmap, new Rectangle(glyph.Subrect.X, glyph.Subrect.Bottom - 1, glyph.Subrect.Width, 1)))
{
glyph.Subrect.Height--;
}
// Crop the left.
while ((glyph.Subrect.Width > 1) && BitmapUtils.IsAlphaEntirely(0, glyph.Bitmap, new Rectangle(glyph.Subrect.X, glyph.Subrect.Y, 1, glyph.Subrect.Height)))
{
glyph.Subrect.X++;
glyph.Subrect.Width--;
glyph.XOffset++;
}
// Crop the right.
while ((glyph.Subrect.Width > 1) && BitmapUtils.IsAlphaEntirely(0, glyph.Bitmap, new Rectangle(glyph.Subrect.Right - 1, glyph.Subrect.Y, 1, glyph.Subrect.Height)))
{
glyph.Subrect.Width--;
glyph.XAdvance++;
}
}
public static Bitmap ArrangeGlyphsFast(Glyph[] sourceGlyphs)
{
// Build up a list of all the glyphs needing to be arranged.
List<ArrangedGlyph> glyphs = new List<ArrangedGlyph>();
int largestWidth = 1;
int largestHeight = 1;
for (int i = 0; i < sourceGlyphs.Length; i++)
{
ArrangedGlyph glyph = new ArrangedGlyph();
glyph.Source = sourceGlyphs[i];
// Leave a one pixel border around every glyph in the output bitmap.
glyph.Width = sourceGlyphs[i].Subrect.Width + 2;
glyph.Height = sourceGlyphs[i].Subrect.Height + 2;
if (glyph.Width > largestWidth)
largestWidth = glyph.Width;
if (glyph.Height > largestHeight)
largestHeight = glyph.Height;
glyphs.Add(glyph);
}
// Work out how big the output bitmap should be.
int outputWidth = GuessOutputWidth(sourceGlyphs);
// Place each glyph in a grid based on the largest glyph size
int curx = 0;
int cury = 0;
for (int i = 0; i < glyphs.Count; i++)
{
glyphs[i].X = curx;
glyphs[i].Y = cury;
curx += largestWidth;
if (curx + largestWidth > outputWidth)
{
curx = 0;
cury += largestHeight;
}
}
// Create the merged output bitmap.
int outputHeight = MakeValidTextureSize(cury + largestHeight, false);
return CopyGlyphsToOutput(glyphs, outputWidth, outputHeight);
}
public static void WriteSpriteFont(CommandLineOptions options, Glyph[] glyphs, float lineSpacing, Bitmap bitmap)
{
using (FileStream file = File.OpenWrite(options.OutputFile))
using (BinaryWriter writer = new BinaryWriter(file))
{
WriteMagic(writer);
WriteGlyphs(writer, glyphs);
writer.Write(lineSpacing);
writer.Write(options.DefaultCharacter);
WriteBitmap(writer, options, bitmap);
}
}
public static Bitmap ArrangeGlyphs(Glyph[] sourceGlyphs)
{
// Build up a list of all the glyphs needing to be arranged.
List<ArrangedGlyph> glyphs = new List<ArrangedGlyph>();
for (int i = 0; i < sourceGlyphs.Length; i++)
{
ArrangedGlyph glyph = new ArrangedGlyph();
glyph.Source = sourceGlyphs[i];
// Leave a one pixel border around every glyph in the output bitmap.
glyph.Width = sourceGlyphs[i].Subrect.Width + 2;
glyph.Height = sourceGlyphs[i].Subrect.Height + 2;
glyphs.Add(glyph);
}
// Sort so the largest glyphs get arranged first.
glyphs.Sort(CompareGlyphSizes);
// Work out how big the output bitmap should be.
int outputWidth = GuessOutputWidth(sourceGlyphs);
int outputHeight = 0;
// Choose positions for each glyph, one at a time.
for (int i = 0; i < glyphs.Count; i++)
{
if (i > 0 && (i % 500) == 0)
{
Console.Write(".");
}
PositionGlyph(glyphs, i, outputWidth);
outputHeight = Math.Max(outputHeight, glyphs[i].Y + glyphs[i].Height);
}
if (glyphs.Count >= 500)
{
Console.WriteLine();
}
// Create the merged output bitmap.
outputHeight = MakeValidTextureSize(outputHeight, false);
return CopyGlyphsToOutput(glyphs, outputWidth, outputHeight);
}
static void WriteGlyphs(BinaryWriter writer, Glyph[] glyphs)
{
writer.Write(glyphs.Length);
foreach (Glyph glyph in glyphs)
{
writer.Write((int)glyph.Character);
writer.Write(glyph.Subrect.Left);
writer.Write(glyph.Subrect.Top);
writer.Write(glyph.Subrect.Right);
writer.Write(glyph.Subrect.Bottom);
writer.Write(glyph.XOffset);
writer.Write(glyph.YOffset);
writer.Write(glyph.XAdvance);
}
}
// Heuristic guesses what might be a good output width for a list of glyphs.
static int GuessOutputWidth(Glyph[] sourceGlyphs)
{
int maxWidth = 0;
int totalSize = 0;
foreach (Glyph glyph in sourceGlyphs)
{
maxWidth = Math.Max(maxWidth, glyph.Subrect.Width);
totalSize += glyph.Subrect.Width * glyph.Subrect.Height;
}
int width = Math.Max((int)Math.Sqrt(totalSize), maxWidth);
return MakeValidTextureSize(width, true);
}
