/// <summary>
/// Creates a new <see cref="GlyphRenderState"/> structure from the parameters to the <see cref="DrawStringInternal{TSource}"/> method.
/// </summary>
public static GlyphRenderState FromDrawStringParameters(UltravioletFontFace fontFace,
Vector2 position, Vector2 origin, Vector2 scale, Single rotation, SpriteEffects effects, Size2 measure)
{
// Determine whether the text is flipped.
var isFlippedHorizontally = (effects & SpriteEffects.FlipHorizontally) == SpriteEffects.FlipHorizontally;
var isFlippedVertically = (effects & SpriteEffects.FlipVertically) == SpriteEffects.FlipVertically;
// Calculate the text area from its measurement.
var areaTL = new Vector2(position.X - origin.X, position.Y - origin.Y);
var areaBR = new Vector2(position.X - origin.X + measure.Width, position.Y - origin.Y + measure.Height);
// Calculate the transformation matrix.
var transformRotation = Matrix.CreateRotationZ(rotation);
var transformScale = Matrix.CreateScale(scale.X, scale.Y, 1f);
Matrix.Multiply(ref transformRotation, ref transformScale, out var transform);
// Transform the text area.
Vector2.Transform(ref areaTL, ref transform, out var areaTransformedTL);
Vector2.Transform(ref areaBR, ref transform, out var areaTransformedBR);
var areaSize = new Size2F(areaBR.X - areaTL.X, areaBR.Y - areaTL.Y);
var areaTransformedSize = new Size2F(
areaTransformedBR.X - areaTransformedTL.X,
areaTransformedBR.Y - areaTransformedTL.Y);
var textStartPosition = new Vector2(
isFlippedHorizontally ? areaTransformedBR.X : areaTransformedTL.X,
isFlippedVertically ? areaTransformedBR.Y : areaTransformedTL.Y);
// Create the new render state object.
return(new GlyphRenderState()
{
FontFace = fontFace,
TextStartPosition = textStartPosition,
TextRenderPosition = textStartPosition,
TextPosition = position,
TextOrigin = origin,
TextScale = scale,
TextIsFlippedHorizontally = isFlippedHorizontally,
TextIsFlippedVertically = isFlippedVertically,
TextDirection = new Vector2(isFlippedHorizontally ? -1 : 1, isFlippedVertically ? -1 : 1),
TextTransform = transform,
TextArea = new RectangleF(areaTL, areaSize),
TextAreaTransformed = new RectangleF(areaTransformedTL, areaTransformedSize),
});
}
/// <summary>
/// Initializes a new instance of the <see cref="UltravioletFont{TFontFace}"/> class.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="regular">The font's regular font face.</param>
/// <param name="bold">The font's bold font face.</param>
/// <param name="italic">The font's italic font face.</param>
/// <param name="boldItalic">The font's bold italic font face.</param>
protected UltravioletFont(UltravioletContext uv, UltravioletFontFace regular, UltravioletFontFace bold, UltravioletFontFace italic, UltravioletFontFace boldItalic)
: base(uv)
{
uv.ValidateResource(regular);
uv.ValidateResource(bold);
uv.ValidateResource(italic);
uv.ValidateResource(boldItalic);
if (regular == null && bold == null && italic == null && boldItalic == null)
{
throw new ArgumentException(UltravioletStrings.InvalidFontFaces);
}
this.Regular = regular;
this.Bold = bold;
this.Italic = italic;
this.BoldItalic = boldItalic;
}