private unsafe Texture CreateTexture(TextKey key)
{
var size = key.Size;
var actualFont = key.Font;
var image = _textImagePool.Acquire(new ImageKey
{
Width = (int)Math.Ceiling(size.X),
Height = (int)Math.Ceiling(size.Y)
});
// Clear image to transparent.
// TODO: Don't need to do this for a newly created image.
fixed(void *pin = &image.DangerousGetPinnableReferenceToPixelBuffer())
{
Unsafe.InitBlock(pin, 0, (uint)(image.Width * image.Height * 4));
}
image.Mutate(x =>
{
var location = new SixLabors.Primitives.PointF(0, size.Y / 2.0f);
// TODO: Vertical centering is not working properly.
location.Y *= 0.8f;
var color = key.Color;
x.DrawText(
new TextGraphicsOptions
{
WrapTextWidth = size.X,
HorizontalAlignment = key.Alignment == TextAlignment.Center
? HorizontalAlignment.Center
: HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Center
},
key.Text,
actualFont,
new Bgra32(
(byte)(color.R * 255.0f),
(byte)(color.G * 255.0f),
(byte)(color.B * 255.0f),
(byte)(color.A * 255.0f)),
location);
});
Texture texture;
// Draw image to texture.
fixed(void *pin = &image.DangerousGetPinnableReferenceToPixelBuffer())
{
texture = _graphicsDevice.ResourceFactory.CreateTexture(
TextureDescription.Texture2D(
(uint)image.Width,
(uint)image.Height,
1,
1,
PixelFormat.B8_G8_R8_A8_UNorm,
TextureUsage.Sampled));
_graphicsDevice.UpdateTexture(
texture,
new IntPtr(pin),
(uint)(image.Width * image.Height * 4),
0, 0, 0,
texture.Width,
texture.Height,
1,
0,
0);
}
_textImagePool.ReleaseAll();
return(texture);
}