static byte[] PackCharacters(CharacterGlyph[] characters, int lineSpace, out int bitmapWidth, out int bitmapHeight)
{
var offsetX = 0u;
var offsetY = 0u;
bitmapWidth = 0;
bitmapHeight = characters.Max(x => x.Bitmap.Height);
int currentRowWidth = 0;
for (int i = 0; i < characters.Length; i++)
{
currentRowWidth += characters[i].Bitmap.Width;
if (currentRowWidth > kMaxFontWidth)
{
currentRowWidth = characters[i].Bitmap.Width;
bitmapHeight += lineSpace;
}
if (currentRowWidth > bitmapWidth)
{
bitmapWidth = currentRowWidth;
}
}
var bitmap = new byte[4 * bitmapHeight * bitmapWidth];
for (int i = 0; i < characters.Length; i++)
{
var sourceBitmap = characters[i].Bitmap;
var sourceBitmapData = sourceBitmap.LockBits(new Rectangle(0, 0, sourceBitmap.Width, sourceBitmap.Height),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
if (offsetX + (uint)characters[i].Bitmap.Width > kMaxFontWidth)
{
offsetX = 0;
offsetY += (uint)lineSpace;
}
var offset = offsetY * bitmapWidth + offsetX;
for (int u = 0; u < sourceBitmap.Height; u++)
{
unsafe
{
var sourceLine = (byte*)sourceBitmapData.Scan0.ToPointer() + sourceBitmapData.Stride * u;
for (int v = 0; v < 4 * sourceBitmap.Width; v++)
{
bitmap[4 * u * bitmapWidth + v + 4 * offset] = *sourceLine;
sourceLine++;
}
}
}
characters[i].Bitmap.UnlockBits(sourceBitmapData);
characters[i].XOffset = offsetX;
characters[i].YOffset = offsetY;
offsetX += (uint)characters[i].Bitmap.Width;
}
GrayToAlpha(bitmap);
//SaveAsBitmap(bitmapWidth, bitmapHeight, bitmap);
return bitmap;
}
// Binary format:
// 4 bytes - bitmap width
// 4 bytes - bitmap height
// * - bitmap data
// 4 bytes - number of characters
// 1 byte - character
// 4 bytes - xOffset
// 4 bytes - yOffset
// 4 bytes - characterWidth
// 4 bytes - characterHeight
// 4 bytes - font line spacing
private static void SaveFont(CharacterGlyph[] characters, float lineSpace, int bitmapWidth, int bitmapHeight, byte[] bitmapData, string outputPath)
{
using (var fileStream = new FileStream(outputPath, FileMode.Create))
{
using (var writer = new BinaryWriter(fileStream))
{
writer.Write(bitmapWidth);
writer.Write(bitmapHeight);
writer.Write(bitmapData);
writer.Write(characters.Length);
foreach (var character in characters)
{
writer.Write((byte)character.Character);
writer.Write(character.XOffset);
writer.Write(character.YOffset);
writer.Write(character.CharacterWidth);
writer.Write(character.CharacterHeight);
}
writer.Write((uint)lineSpace);
}
}
}
private static CharacterGlyph[] ImportFont(Font font, Bitmap stagingBitmap, Graphics stagingGraphics)
{
var characters = new CharacterGlyph[characterRangeTo - characterRangeFrom];
for (int i = characterRangeFrom; i < characterRangeTo; i++)
{
characters[i - characterRangeFrom] = ImportCharacter((char)i, font, stagingBitmap, stagingGraphics);
}
return characters;
}
