public void DrawText(string text, GLFont font, float startX, float startY, GLBrush brush, float width = 1000)
{
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, font.Texture);
GL.Color4(brush.Color0.R, brush.Color0.G, brush.Color0.B, (byte)255);
GL.Begin(BeginMode.Quads);
int alignmentOffsetX = 0;
if (font.Alignment != 0)
{
font.MeasureString(text, out int minX, out int maxX);
if (font.Alignment == 1)
{
alignmentOffsetX -= minX;
alignmentOffsetX += ((int)width - maxX - minX) / 2;
}
else
{
alignmentOffsetX -= minX;
alignmentOffsetX += ((int)width - maxX - minX);
}
}
int x = (int)(startX + alignmentOffsetX);
int y = (int)(startY + font.OffsetY);
for (int i = 0; i < text.Length; i++)
{
var c0 = text[i];
var info = font.GetCharInfo(c0);
int x0 = x + info.xoffset;
int y0 = y + info.yoffset;
int x1 = x0 + info.width;
int y1 = y0 + info.height;
GL.TexCoord2(info.u0, info.v0); GL.Vertex2(x0, y0);
GL.TexCoord2(info.u1, info.v0); GL.Vertex2(x1, y0);
GL.TexCoord2(info.u1, info.v1); GL.Vertex2(x1, y1);
GL.TexCoord2(info.u0, info.v1); GL.Vertex2(x0, y1);
x += info.xadvance;
if (i != text.Length - 1)
{
char c1 = text[i + 1];
x += font.GetKerning(c0, c1);
}
}
GL.End();
GL.Disable(EnableCap.Texture2D);
}
public GLFont CreateFont(Gdk.Pixbuf pixbuf, string[] def, int size, int alignment, bool ellipsis, int existingTexture = -1)
{
var font = (GLFont)null;
var lines = def;
int baseValue = 0;
int texSizeX = 256;
int texSizeY = 256;
foreach (var line in lines)
{
var splits = line.Split(new[] { ' ', '=', '\"' }, StringSplitOptions.RemoveEmptyEntries);
switch (splits[0])
{
case "common":
{
baseValue = ReadFontParam <int>(splits, "base");
texSizeX = ReadFontParam <int>(splits, "scaleW");
texSizeY = ReadFontParam <int>(splits, "scaleH");
int glTex = existingTexture;
if (glTex == 0)
{
glTex = CreateGLTexture(pixbuf);
}
font = new GLFont(glTex, size - baseValue, alignment, ellipsis);
break;
}
case "char":
{
var charInfo = new GLFont.CharInfo();
int c = ReadFontParam <int>(splits, "id");
int x = ReadFontParam <int>(splits, "x");
int y = ReadFontParam <int>(splits, "y");
charInfo.width = ReadFontParam <int>(splits, "width");
charInfo.height = ReadFontParam <int>(splits, "height");
charInfo.xoffset = ReadFontParam <int>(splits, "xoffset");
charInfo.yoffset = ReadFontParam <int>(splits, "yoffset");
charInfo.xadvance = ReadFontParam <int>(splits, "xadvance");
charInfo.u0 = (x + 0.0f) / (float)texSizeX;
charInfo.v0 = (y + 0.0f) / (float)texSizeY;
charInfo.u1 = (x + 0.0f + charInfo.width) / (float)texSizeX;
charInfo.v1 = (y + 0.0f + charInfo.height) / (float)texSizeY;
font.AddChar((char)c, charInfo);
break;
}
case "kerning":
{
int c0 = ReadFontParam <int>(splits, "first");
int c1 = ReadFontParam <int>(splits, "second");
int amount = ReadFontParam <int>(splits, "amount");
font.AddKerningPair(c0, c1, amount);
break;
}
}
}
return(font);
}
public float MeasureString(string text, GLFont font)
{
font.MeasureString(text, out int minX, out int maxX);
return(maxX - minX);
}
