// Crops unused space from around the edge of a glyph bitmap.
public static void Crop(Glyph glyph)
{
if (glyph == null)
{
throw new NullReferenceException("The given glyph may not be equal to null.");
}
// Crop the top.
while ((glyph.Region.Height > 1) && BitmapUtils.MatchesAlpha(0, glyph.Bitmap, new Rectangle(glyph.Region.X, glyph.Region.Y, glyph.Region.Width, 1)))
{
++glyph.Region.Y;
--glyph.Region.Height;
++glyph.OffsetY;
}
// Crop the bottom.
while ((glyph.Region.Height > 1) && BitmapUtils.MatchesAlpha(0, glyph.Bitmap, new Rectangle(glyph.Region.X, glyph.Region.Bottom - 1, glyph.Region.Width, 1)))
{
--glyph.Region.Height;
}
// Crop the left.
while ((glyph.Region.Width > 1) && BitmapUtils.MatchesAlpha(0, glyph.Bitmap, new Rectangle(glyph.Region.X, glyph.Region.Y, 1, glyph.Region.Height)))
{
++glyph.Region.X;
--glyph.Region.Width;
++glyph.OffsetX;
}
// Crop the right.
while ((glyph.Region.Width > 1) && BitmapUtils.MatchesAlpha(0, glyph.Bitmap, new Rectangle(glyph.Region.Right - 1, glyph.Region.Y, 1, glyph.Region.Height)))
{
--glyph.Region.Width;
++glyph.AdvanceX;
}
}
static void MakeSpriteFont(CommandLineOptions options)
{
// Import.
Console.WriteLine("Importing {0}", options.SourceFont);
float lineSpacing;
Glyph[] glyphs = ImportFont(options, out lineSpacing);
Console.WriteLine("Captured {0} glyphs", glyphs.Length);
// Optimize.
Console.WriteLine("Cropping glyph borders");
foreach (Glyph glyph in glyphs)
{
GlyphCropper.Crop(glyph);
}
Console.WriteLine("Packing glyphs into sprite sheet");
Bitmap bitmap;
if (options.FastPack)
{
bitmap = GlyphPacker.ArrangeGlyphsFast(glyphs);
}
else
{
bitmap = GlyphPacker.ArrangeGlyphs(glyphs);
}
// Emit texture size warning based on known Feature Level limits.
if (bitmap.Width > 16384 || bitmap.Height > 16384)
{
Console.WriteLine("WARNING: Resulting texture is too large for all known Feature Levels (9.1 - 12.1)");
}
else if (bitmap.Width > 8192 || bitmap.Height > 8192)
{
if (options.FeatureLevel < FeatureLevel.FL11_0)
{
Console.WriteLine("WARNING: Resulting texture requires a Feature Level 11.0 or later device.");
}
}
else if (bitmap.Width > 4096 || bitmap.Height > 4096)
{
if (options.FeatureLevel < FeatureLevel.FL10_0)
{
Console.WriteLine("WARNING: Resulting texture requires a Feature Level 10.0 or later device.");
}
}
else if (bitmap.Width > 2048 || bitmap.Height > 2048)
{
if (options.FeatureLevel < FeatureLevel.FL9_3)
{
Console.WriteLine("WARNING: Resulting texture requires a Feature Level 9.3 or later device.");
}
}
// Adjust line and character spacing.
lineSpacing += options.LineSpacing;
foreach (Glyph glyph in glyphs)
{
glyph.AdvanceX += options.CharacterSpacing;
}
// Automatically detect whether this is a monochromatic or color font?
if (options.TextureFormat == TextureFormat.Auto)
{
bool isMono = BitmapUtils.MatchesRGB(Color.White, bitmap);
options.TextureFormat = isMono ? TextureFormat.CompressedMono :
TextureFormat.Rgba32;
}
// Convert to premultiplied alpha format.
if (!options.NoPremultiply)
{
Console.WriteLine("Premultiplying alpha");
BitmapUtils.ConvertToPremultipliedAlpha(bitmap);
}
// Save output files.
if (!string.IsNullOrEmpty(options.DebugOutputSpriteSheet))
{
Console.WriteLine("Saving debug output spritesheet {0}", options.DebugOutputSpriteSheet);
bitmap.Save(options.DebugOutputSpriteSheet);
}
Console.WriteLine("Writing {0} ({1} format)", options.OutputFile, options.TextureFormat);
SpriteFontWriter.WriteSpriteFont(options, glyphs, lineSpacing, bitmap);
}