internal void DrawInto( SpriteBatch spriteBatch, ref CharacterSource text, Vector2 position, Color color,
float rotation, Vector2 origin, Vector2 scale, SpriteEffects effect, float depth)
{
var flipAdjustment = Vector2.Zero;
var flippedVert = (effect & SpriteEffects.FlipVertically) == SpriteEffects.FlipVertically;
var flippedHorz = (effect & SpriteEffects.FlipHorizontally) == SpriteEffects.FlipHorizontally;
if (flippedVert || flippedHorz)
{
Vector2 size;
MeasureString(ref text, out size);
if (flippedHorz)
{
origin.X *= -1;
flipAdjustment.X = -size.X;
}
if (flippedVert)
{
origin.Y *= -1;
flipAdjustment.Y = LineSpacing - size.Y;
}
}
// TODO: This looks excessive... i suspect we could do most
// of this with simple vector math and avoid this much matrix work.
Matrix transformation, temp;
Matrix.CreateTranslation(-origin.X, -origin.Y, 0f, out transformation);
Matrix.CreateScale((flippedHorz ? -scale.X : scale.X), (flippedVert ? -scale.Y : scale.Y), 1f, out temp);
Matrix.Multiply(ref transformation, ref temp, out transformation);
Matrix.CreateTranslation(flipAdjustment.X, flipAdjustment.Y, 0, out temp);
Matrix.Multiply(ref temp, ref transformation, out transformation);
Matrix.CreateRotationZ(rotation, out temp);
Matrix.Multiply(ref transformation, ref temp, out transformation);
Matrix.CreateTranslation(position.X, position.Y, 0f, out temp);
Matrix.Multiply(ref transformation, ref temp, out transformation);
// Get the default glyph here once.
Glyph? defaultGlyph = null;
if (DefaultCharacter.HasValue)
defaultGlyph = _glyphs[DefaultCharacter.Value];
var currentGlyph = Glyph.Empty;
var offset = Vector2.Zero;
var hasCurrentGlyph = false;
var firstGlyphOfLine = true;
for (var i = 0; i < text.Length; ++i)
{
var c = text[i];
if (c == '\r')
{
hasCurrentGlyph = false;
continue;
}
if (c == '\n')
{
offset.X = 0;
offset.Y += LineSpacing;
hasCurrentGlyph = false;
firstGlyphOfLine = true;
continue;
}
if (hasCurrentGlyph) {
offset.X += Spacing + currentGlyph.Width + currentGlyph.RightSideBearing;
}
hasCurrentGlyph = _glyphs.TryGetValue(c, out currentGlyph);
if (!hasCurrentGlyph)
{
if (!defaultGlyph.HasValue)
throw new ArgumentException(Errors.TextContainsUnresolvableCharacters, "text");
currentGlyph = defaultGlyph.Value;
hasCurrentGlyph = true;
}
if (hasCurrentGlyph) {
// The first character on a line might have a negative left side bearing.
// In this scenario, SpriteBatch/SpriteFont normally offset the text to the right,
// so that text does not hang off the left side of its rectangle.
if (firstGlyphOfLine) {
offset.X = Math.Max(offset.X, 0);
firstGlyphOfLine = false;
} else {
offset.X += currentGlyph.LeftSideBearing;
}
}
var p = offset;
if (flippedHorz)
p.X += currentGlyph.BoundsInTexture.Width;
p.X += currentGlyph.Cropping.X;
if (flippedVert)
p.Y += currentGlyph.BoundsInTexture.Height - LineSpacing;
p.Y += currentGlyph.Cropping.Y;
Vector2.Transform(ref p, ref transformation, out p);
var destRect = new Vector4( p.X, p.Y,
currentGlyph.BoundsInTexture.Width * scale.X,
currentGlyph.BoundsInTexture.Height * scale.Y);
spriteBatch.DrawInternal(
_texture, destRect, currentGlyph.BoundsInTexture,
color, rotation, Vector2.Zero, effect, depth, false);
}
// We need to flush if we're using Immediate sort mode.
spriteBatch.FlushIfNeeded();
}
internal void DrawInto(
SpriteBatch spriteBatch,
ref CharacterSource text,
Vector2 position,
Color color,
float rotation,
Vector2 origin,
Vector2 scale,
SpriteEffects effect,
float depth
)
{
Vector2 flipAdjustment = Vector2.Zero;
bool flippedVert = (effect & SpriteEffects.FlipVertically) == SpriteEffects.FlipVertically;
bool flippedHorz = (effect & SpriteEffects.FlipHorizontally) == SpriteEffects.FlipHorizontally;
if (flippedVert || flippedHorz)
{
Vector2 size;
MeasureString(ref text, out size);
if (flippedHorz)
{
origin.X *= -1;
flipAdjustment.X = -size.X;
}
if (flippedVert)
{
origin.Y *= -1;
flipAdjustment.Y = LineSpacing - size.Y;
}
}
/* TODO: This looks excessive... i suspect we could do most
* of this with simple vector math and avoid this much matrix work.
*/
Matrix transformation, temp;
Matrix.CreateTranslation(-origin.X, -origin.Y, 0f, out transformation);
Matrix.CreateScale((flippedHorz ? -scale.X : scale.X), (flippedVert ? -scale.Y : scale.Y), 1f, out temp);
Matrix.Multiply(ref transformation, ref temp, out transformation);
Matrix.CreateTranslation(flipAdjustment.X, flipAdjustment.Y, 0, out temp);
Matrix.Multiply(ref temp, ref transformation, out transformation);
Matrix.CreateRotationZ(rotation, out temp);
Matrix.Multiply(ref transformation, ref temp, out transformation);
Matrix.CreateTranslation(position.X, position.Y, 0f, out temp);
Matrix.Multiply(ref transformation, ref temp, out transformation);
// Get the default glyph here once.
Glyph?defaultGlyph = null;
if (DefaultCharacter.HasValue)
{
defaultGlyph = _glyphs[DefaultCharacter.Value];
}
Glyph currentGlyph = Glyph.Empty;
Vector2 offset = Vector2.Zero;
bool hasCurrentGlyph = false;
bool firstGlyphOfLine = true;
for (int i = 0; i < text.Length; i += 1)
{
char c = text[i];
if (c == '\r')
{
hasCurrentGlyph = false;
continue;
}
if (c == '\n')
{
offset.X = 0;
offset.Y += LineSpacing;
hasCurrentGlyph = false;
firstGlyphOfLine = true;
continue;
}
if (hasCurrentGlyph)
{
offset.X += Spacing + currentGlyph.Width + currentGlyph.RightSideBearing;
}
hasCurrentGlyph = _glyphs.TryGetValue(c, out currentGlyph);
if (!hasCurrentGlyph)
{
if (!defaultGlyph.HasValue)
{
throw new ArgumentException(Errors.TextContainsUnresolvableCharacters, "text");
}
currentGlyph = defaultGlyph.Value;
hasCurrentGlyph = true;
}
if (hasCurrentGlyph)
{
/* The first character on a line might have a negative left side bearing.
* In this scenario, SpriteBatch/SpriteFont normally offset the text to the right,
* so that text does not hang off the left side of its rectangle.
*/
if (firstGlyphOfLine)
{
offset.X = Math.Max(offset.X, 0);
firstGlyphOfLine = false;
}
else
{
offset.X += currentGlyph.LeftSideBearing;
}
}
Vector2 p = offset;
if (flippedHorz)
{
p.X += currentGlyph.BoundsInTexture.Width;
}
p.X += currentGlyph.Cropping.X;
if (flippedVert)
{
p.Y += currentGlyph.BoundsInTexture.Height - LineSpacing;
}
p.Y += currentGlyph.Cropping.Y;
Vector2.Transform(ref p, ref transformation, out p);
Vector4 destRect = new Vector4(
p.X,
p.Y,
currentGlyph.BoundsInTexture.Width * scale.X,
currentGlyph.BoundsInTexture.Height * scale.Y
);
spriteBatch.DrawInternal(
_texture,
destRect,
currentGlyph.BoundsInTexture,
color,
rotation,
Vector2.Zero,
effect,
depth,
false
);
}
// We need to flush if we're using Immediate sort mode.
spriteBatch.FlushIfNeeded();
}
