private unsafe void DrawChar(BdfChar fontChar, IntPtr dispBuf, int dispBW, int dispBH, int dx, int dy, int icolor)
{
dx = dx - this.fbLeft + fontChar.bbLeft;
dy = dy + this.fbH - fontChar.bbH + this.fbBottom - fontChar.bbBottom;
int x1 = dx;
int y1 = dy;
int x2 = dx + fbW - 1;
int y2 = dy + fbH - 1;
if (x1 >= dispBW || x2 < 0 || y1 >= dispBH || y2 < 0)
{
return;
}
int fw = fontChar.bbW;
int fh = fontChar.bbH;
byte[] src = fontChar.bitmap;
for (int y = 0; y < fh; y++)
{
if (dy + y < 0 || dy + y >= dispBH)
{
continue;
}
int *dst = (int *)dispBuf + dispBW * (dy + y) + dx;
int srcIdx = y * fw;
for (int x = 0; x < fw; x++, srcIdx++, dst++)
{
if (dx + x < 0 || dx + x >= dispBW)
{
continue;
}
if (src[srcIdx] != 0)
{
*dst = icolor;
}
}
}
}
public BdfFont(string bdf)
{
string[] lines = bdf.Split(new char[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
int bitmapIdx = -1;
foreach (var line in lines)
{
string name = string.Empty;
string data = string.Empty;
var spaceIdx = line.IndexOf(' ');
if (spaceIdx > 0)
{
name = line.Substring(0, spaceIdx);
data = line.Substring(spaceIdx + 1);
}
else
{
name = line;
}
if (name == "ENDCHAR")
{
currChar = null;
bitmapIdx = -1;
}
if (bitmapIdx != -1)
{
ParseBitmap(currChar.bitmap, bitmapIdx, line, currChar.bbW);
bitmapIdx += currChar.bbW;
}
else
{
if (name == "FONTBOUNDINGBOX")
{
var words = data.Split(' ');
this.fbW = int.Parse(words[0]);
this.fbH = int.Parse(words[1]);
this.fbLeft = int.Parse(words[2]);
this.fbBottom = int.Parse(words[3]);
}
else if (name == "STARTCHAR")
{
currChar = new BdfChar();
currChar.name = data;
}
else if (name == "ENCODING")
{
int charIdx = int.Parse(data);
fontChars[charIdx] = currChar;
currChar.encoding = charIdx;
}
else if (name == "DWIDTH")
{
var words = data.Split(' ');
currChar.width = int.Parse(words[0]);
}
else if (name == "BBX")
{
var words = data.Split(' ');
currChar.bbW = int.Parse(words[0]);
currChar.bbH = int.Parse(words[1]);
currChar.bbLeft = int.Parse(words[2]);
currChar.bbBottom = int.Parse(words[3]);
currChar.bitmap = new byte[currChar.bbW * currChar.bbH];
}
else if (name == "BITMAP")
{
bitmapIdx = 0;
}
}
}
}
