// Creates a font atlas from FntFile
public static void CreateFontAtlas(FntFile fntFile, Color backColor, Color textColor, out Texture2D atlasTextureOut, out Rect[] atlasRectsOut)
{
const int atlasDim = 256;
// Create atlas colors array
Color32[] atlasColors = new Color32[atlasDim * atlasDim];
// Add Daggerfall glyphs
int xpos = 0, ypos = 0;
Rect[] rects = new Rect[FntFile.MaxGlyphCount];
for (int i = 0; i < FntFile.MaxGlyphCount; i++)
{
// Get glyph colors
Rect rect;
Color32[] glyphColors = GetGlyphColors(fntFile, i, backColor, textColor, out rect);
// Offset pixel rect
rect.x += xpos;
rect.y += ypos;
// Flip pixel rect top-bottom
float top = rect.yMin;
float bottom = rect.yMax;
rect.yMin = bottom;
rect.yMax = top;
// Convert to UV coords and store
rect.xMin /= atlasDim;
rect.yMin /= atlasDim;
rect.xMax /= atlasDim;
rect.yMax /= atlasDim;
rects[i] = rect;
// Insert into atlas
InsertColors(
ref glyphColors,
ref atlasColors,
xpos,
ypos,
FntFile.GlyphFixedDimension,
FntFile.GlyphFixedDimension,
atlasDim,
atlasDim);
// Offset position
xpos += FntFile.GlyphFixedDimension;
if (xpos >= atlasDim)
{
xpos = 0;
ypos += FntFile.GlyphFixedDimension;
}
}
// Create texture from colors array
atlasTextureOut = MakeTexture2D(ref atlasColors, atlasDim, atlasDim, TextureFormat.ARGB32, false);
atlasRectsOut = rects;
}
// Gets a glyph from FntFile as Color32 array
public static Color32[] GetGlyphColors(FntFile fntFile, int index, Color backColor, Color textColor, out Rect sizeOut)
{
// Get actual glyph rect
sizeOut = new Rect(0, 0, fntFile.GetGlyphWidth(index), fntFile.FixedHeight);
// Get glyph byte data as color array
byte[] data = fntFile.GetGlyphPixels(index);
Color32[] colors = new Color32[data.Length];
for (int y = 0; y < FntFile.GlyphFixedDimension; y++)
{
for (int x = 0; x < FntFile.GlyphFixedDimension; x++)
{
int pos = y * FntFile.GlyphFixedDimension + x;
if (data[pos] > 0)
colors[pos] = textColor;
else
colors[pos] = backColor;
}
}
return colors;
}
// Gets proportial-width glyph data from FntFile as Color32 array
public static Color32[] GetProportionalGlyphColors(FntFile fntFile, int index, Color backColor, Color textColor, bool invertY = false)
{
// Get actual glyph dimensions
int width = fntFile.GetGlyphWidth(index);
int height = fntFile.FixedHeight;
Color32[] colors = new Color32[width * height];
// Get glyph byte data as color array
byte[] data = fntFile.GetGlyphPixels(index);
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int srcPos = y * FntFile.GlyphFixedDimension + x;
int dstPos = (invertY) ? (height - 1 - y) * width + x : y * width + x;
colors[dstPos] = (data[srcPos] > 0) ? textColor : backColor;
}
}
return colors;
}
