// Adds the specified caharacter to the texture packer.
private void LoadGlyph(char c, out RectangleF rectangle)
{
if (pack == null)
{
PrepareTexturePacker();
}
RectangleF glyph_rect = MeasureText(c.ToString(), SizeF.Empty, load_glyph_string_format);
SizeF glyph_size = new SizeF(glyph_rect.Right, glyph_rect.Bottom); // We need to do this, since the origin might not be (0, 0)
Glyph g = new Glyph(c, font, glyph_size);
Rectangle rect;
try
{
pack.Add(g, out rect);
}
catch (InvalidOperationException expt)
{
// TODO: The TexturePacker is full, create a new font sheet.
Trace.WriteLine(expt);
throw;
}
GL.BindTexture(TextureTarget.Texture2D, texture);
gfx.Clear(System.Drawing.Color.Transparent);
gfx.DrawString(g.Character.ToString(), g.Font, System.Drawing.Brushes.White, 0.0f, 0.0f, default_string_format);
BitmapData bitmap_data = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly,
System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.PushClientAttrib(ClientAttribMask.ClientPixelStoreBit);
try
{
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1.0f);
GL.PixelStore(PixelStoreParameter.UnpackRowLength, bmp.Width);
GL.TexSubImage2D(TextureTarget.Texture2D, 0, (int)rect.Left, (int)rect.Top,
rect.Width, rect.Height,
OpenTK.Graphics.PixelFormat.Rgba,
PixelType.UnsignedByte, bitmap_data.Scan0);
}
finally
{
GL.PopClientAttrib();
}
bmp.UnlockBits(bitmap_data);
rectangle = RectangleF.FromLTRB(
rect.Left / (float)texture_width,
rect.Top / (float)texture_height,
rect.Right / (float)texture_width,
rect.Bottom / (float)texture_height);
loaded_glyphs.Add(g.Character, rectangle);
}
public void WriteRegion(Rectangle source, Rectangle target, int mipLevel, Bitmap bitmap)
{
if (bitmap == null)
{
throw new ArgumentNullException("data");
}
GraphicsUnit unit = GraphicsUnit.Pixel;
if (!bitmap.GetBounds(ref unit).Contains(source))
{
throw new InvalidOperationException("The source Rectangle is larger than the Bitmap.");
}
if (mipLevel < 0)
{
throw new ArgumentOutOfRangeException("mipLevel");
}
Bind();
BitmapData data = null;
GL.PushClientAttrib(ClientAttribMask.ClientPixelStoreBit);
try
{
data = bitmap.LockBits(source, ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
GL.PixelStore(PixelStoreParameter.UnpackRowLength, bitmap.Width);
GL.TexSubImage2D(TextureTarget.Texture2D, mipLevel,
target.Left, target.Top,
target.Width, target.Height,
OpenTK.Graphics.PixelFormat.Bgra,
PixelType.UnsignedByte, data.Scan0);
}
finally
{
GL.PopClientAttrib();
if (data != null)
{
bitmap.UnlockBits(data);
}
}
}
