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--;
}
}
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++)
{
PositionGlyph(glyphs, i, outputWidth);
outputHeight = Math.Max(outputHeight, glyphs[i].Y + glyphs[i].Height);
}
// Create the merged output bitmap.
outputHeight = MakeValidTextureSize(outputHeight, false);
return CopyGlyphsToOutput(glyphs, outputWidth, outputHeight);
}
// 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);
}
private Glyph ImportGlyph(Factory factory, FontFace fontFace, char character, FontMetrics fontMetrics, float fontSize, FontAntiAliasMode antiAliasMode)
{
var indices = fontFace.GetGlyphIndices(new int[] { character });
var metrics = fontFace.GetDesignGlyphMetrics(indices, false);
var metric = metrics[0];
var width = (float)(metric.AdvanceWidth - metric.LeftSideBearing - metric.RightSideBearing) / fontMetrics.DesignUnitsPerEm * fontSize;
var height = (float)(metric.AdvanceHeight - metric.TopSideBearing - metric.BottomSideBearing) / fontMetrics.DesignUnitsPerEm * fontSize;
var xOffset = (float)metric.LeftSideBearing / fontMetrics.DesignUnitsPerEm * fontSize;
var yOffset = (float)(metric.TopSideBearing - metric.VerticalOriginY) / fontMetrics.DesignUnitsPerEm * fontSize;
var advanceWidth = (float)metric.AdvanceWidth / fontMetrics.DesignUnitsPerEm * fontSize;
//var advanceHeight = (float)metric.AdvanceHeight / fontMetrics.DesignUnitsPerEm * fontSize;
var pixelWidth = (int)Math.Ceiling(width + 4);
var pixelHeight = (int)Math.Ceiling(height + 4);
var matrix = Matrix.Identity;
matrix.M41 = -(float)Math.Floor(xOffset) + 1;
matrix.M42 = -(float)Math.Floor(yOffset) + 1;
Bitmap bitmap;
if (char.IsWhiteSpace(character))
{
bitmap = new Bitmap(1, 1, PixelFormat.Format32bppArgb);
}
else
{
var glyphRun = new GlyphRun
{
FontFace = fontFace,
Advances = new[] { (float)Math.Ceiling(advanceWidth) },
FontSize = fontSize,
BidiLevel = 0,
Indices = indices,
IsSideways = false,
Offsets = new[] { new GlyphOffset() }
};
RenderingMode renderingMode;
if (antiAliasMode != FontAntiAliasMode.Aliased)
{
var rtParams = new RenderingParams(factory);
renderingMode = fontFace.GetRecommendedRenderingMode(fontSize, 1.0f, MeasuringMode.Natural, rtParams);
rtParams.Dispose();
}
else
{
renderingMode = RenderingMode.Aliased;
}
using (var runAnalysis = new GlyphRunAnalysis(factory,
glyphRun,
1.0f,
matrix,
renderingMode,
MeasuringMode.Natural,
0.0f,
0.0f))
{
var bounds = new SharpDX.Rectangle(0, 0, pixelWidth, pixelHeight);
bitmap = new Bitmap(bounds.Width, bounds.Height, PixelFormat.Format32bppArgb);
if (renderingMode == RenderingMode.Aliased)
{
var texture = new byte[bounds.Width * bounds.Height];
runAnalysis.CreateAlphaTexture(TextureType.Aliased1x1, bounds, texture, texture.Length);
for (int y = 0; y < bounds.Height; y++)
{
for (int x = 0; x < bounds.Width; x++)
{
int pixelX = y * bounds.Width + x;
var grey = texture[pixelX];
var color = Color.FromArgb(grey, grey, grey);
bitmap.SetPixel(x, y, color);
}
}
}
else
{
var texture = new byte[bounds.Width * bounds.Height * 3];
runAnalysis.CreateAlphaTexture(TextureType.Cleartype3x1, bounds, texture, texture.Length);
for (int y = 0; y < bounds.Height; y++)
{
for (int x = 0; x < bounds.Width; x++)
{
int pixelX = (y * bounds.Width + x) * 3;
var red = LinearToGamma(texture[pixelX]);
var green = LinearToGamma(texture[pixelX + 1]);
var blue = LinearToGamma(texture[pixelX + 2]);
var color = Color.FromArgb(red, green, blue);
bitmap.SetPixel(x, y, color);
}
}
}
}
}
var glyph = new Glyph(character, bitmap)
{
XOffset = -matrix.M41,
XAdvance = advanceWidth,
YOffset = -matrix.M42,
};
return(glyph);
}
