private void AddGlyphToTexture(char glyph, int index)
{
int width, height, xOffset, yOffset;
var glyphIndex = font.FindGlyphIndex(glyph);
if (glyphIndex == 0)
{
Debug.Print($"Glyph not found in font {glyph.ToString()}");
return;
}
byte[] rawData = font.GetCodepointBitmap(
glyph, fontScale, fontScale,
out width, out height, out xOffset, out yOffset
);
if (width == 0 | height == 0)
{
return;
}
int boxX0, boxY0, boxX1, boxY1;
font.GetCodepointBitmapBox(
glyph, fontScale, fontScale, out boxX0, out boxY0, out boxX1, out boxY1
);
var textureData = new Color[width * height];
foreach (int i in Enumerable.Range(0, width * height))
{
textureData[i] = new Color(rawData[i], rawData[i], rawData[i], rawData[i]);
}
var quarterTileSize = appConfig.canvasTileSize / 4;
var baseline = ((index / appConfig.glyphPaletteSize) * appConfig.canvasTileSize) + appConfig.canvasTileSize - quarterTileSize;
var tilePosX = Math.Max(0, ((index % appConfig.glyphPaletteSize) * appConfig.canvasTileSize) + boxX0);
var tilePosY = Math.Max(0, baseline + boxY0);
if (width + tilePosX > textureSize)
{
width = textureSize - tilePosX;
}
if (height + tilePosY > textureSize)
{
height = textureSize - tilePosY;
}
texture.SetData(
0, new Rectangle(tilePosX, tilePosY, width, height), textureData, 0, width * height
);
}