private void IterateStringEm(string text, Vector2 position, bool draw, float realFontSize, Color4 color, CoordinateType coordinateType,
out StringMetrics metrics)
{
var scale = realFontSize / FontSize;
IterateString(text, position, draw, scale, color, coordinateType, out metrics);
}
private void IterateString(string text, Vector2 position, bool draw, float scale, Color4 color, CoordinateType coordinateType,
out StringMetrics metrics)
{
metrics = new StringMetrics();
float scalY = coordinateType == CoordinateType.SNorm ? -1 : 1;
var visualText = NBidi.NBidi.LogicalToVisual(text);
var codePoints = Helpers.ConvertToCodePointArray(visualText);
for (var i = 0; i < codePoints.Length; i++)
{
var c = codePoints[i];
var charDesc = GetCharDescription(c);
var charMetrics = charDesc.ToStringMetrics(position, scale, scale * scalY);
if (draw)
{
if (charMetrics.FullRectSize.X != 0 && charMetrics.FullRectSize.Y != 0)
{
var posY = position.Y - scalY * charMetrics.OverhangTop;
var posX = position.X - charMetrics.OverhangLeft;
Sprite.Draw(charDesc.TableDescription.Srv, new Vector2(posX, posY), charMetrics.FullRectSize, Vector2.Zero, 0,
charDesc.TexCoordsStart, charDesc.TexCoordsSize, color, coordinateType);
}
}
metrics.Merge(charMetrics);
position.X += charMetrics.Size.X;
// Break newlines
if (c == '\r')
{
position.X = metrics.TopLeft.X;
}
if (c == '\n')
{
position.Y = metrics.BottomRight.Y - charMetrics.Size.Y / 2;
}
}
}
/// <summary>
/// Merges this instance of StringMetrics with another instance.
/// The textblock and overhangs of this instance will be increased to cover both instances.
/// </summary>
/// <param name="second">The second StringMetrics instance. This object will not be changed.</param>
/// <exception cref="System.ArgumentException">Thrown when one instance has flipped axes and the other does not.</exception>
public void Merge(StringMetrics second)
{
// If current instance has no values yet, take the values of the second instance
if (Size.X == 0 && Size.Y == 0)
{
TopLeft = second.TopLeft;
Size = second.Size;
OverhangLeft = second.OverhangLeft;
OverhangRight = second.OverhangRight;
OverhangTop = second.OverhangTop;
OverhangBottom = second.OverhangBottom;
return;
}
// If second instance is not visible, do nothing
if (second.FullRectSize.X == 0 && second.FullRectSize.Y == 0)
{
return;
}
// Flipped y axis means that positive y points upwards
// Flipped x axis means that positive x points to the right
var xAxisFlipped = Size.X < 0;
var yAxisFlipped = Size.Y < 0;
// Check, if axes of both instances point in the same direction
if (Size.X * second.Size.X < 0)
{
throw new ArgumentException("The x-axis of the current instance is " +
(xAxisFlipped ? "" : "not ") + "flipped. The x-axis of the second instance has to point in the same direction");
}
if (Size.Y * second.Size.Y < 0)
{
throw new ArgumentException("The y-axis of the current instance is " +
(yAxisFlipped ? "" : "not ") + "flipped. The y-axis of the second instance has to point in the same direction");
}
// Update flipped info if it cannot be obtained from the current instance
if (Size.X == 0)
{
xAxisFlipped = second.Size.X < 0;
}
if (Size.Y == 0)
{
yAxisFlipped = second.Size.Y < 0;
}
// Find the functions to determine the topmost of two values and so on
Func <float, float, float> findTopMost, findBottomMost;
Func <float, float, float> findLeftMost, findRightMost;
if (yAxisFlipped)
{
findTopMost = Math.Max;
findBottomMost = Math.Min;
}
else
{
findTopMost = Math.Min;
findBottomMost = Math.Max;
}
if (xAxisFlipped)
{
findLeftMost = Math.Max;
findRightMost = Math.Min;
}
else
{
findLeftMost = Math.Min;
findRightMost = Math.Max;
}
// Find new textblock
var top = findTopMost(TopLeft.Y, second.TopLeft.Y);
var bottom = findBottomMost(TopLeft.Y + Size.Y, second.TopLeft.Y + second.Size.Y);
var left = findLeftMost(TopLeft.X, second.TopLeft.X);
var right = findRightMost(TopLeft.X + Size.X, second.TopLeft.X + second.Size.X);
// Find new overhangs
var topOverhangPos = findTopMost(FullRectTopLeft.Y, second.FullRectTopLeft.Y);
var bottomOverhangPos = findBottomMost(FullRectTopLeft.Y + FullRectSize.Y, second.FullRectTopLeft.Y + second.FullRectSize.Y);
var leftOverhangPos = findLeftMost(FullRectTopLeft.X, second.FullRectTopLeft.X);
var rightOverhangPos = findRightMost(FullRectTopLeft.X + FullRectSize.X, second.FullRectTopLeft.X + second.FullRectSize.X);
TopLeft = new Vector2(left, top);
Size = new Vector2(right - left, bottom - top);
OverhangLeft = (left - leftOverhangPos) * (xAxisFlipped ? -1 : 1);
OverhangRight = (rightOverhangPos - right) * (xAxisFlipped ? -1 : 1);
OverhangTop = (top - topOverhangPos) * (yAxisFlipped ? -1 : 1);
OverhangBottom = (bottomOverhangPos - bottom) * (yAxisFlipped ? -1 : 1);
}
/// <summary>
/// Draws the string in the specified coordinate system aligned in the given rectangle. The text is not clipped or wrapped.
/// </summary>
/// <param name="text">The text to draw</param>
/// <param name="rect">The rectangle in which to align the text</param>
/// <param name="align">Alignment of text in rectangle</param>
/// <param name="realFontSize">The real font size in the chosen coordinate system</param>
/// <param name="color">The color in which to draw the text</param>
/// <param name="coordinateType">The chosen coordinate system</param>
/// <returns>The StringMetrics for the rendered text</returns>
public StringMetrics DrawString(string text, RectangleF rect, TextAlignment align, float realFontSize, Color4 color,
CoordinateType coordinateType)
{
// If text is aligned top and left, no adjustment has to be made
if (align.HasFlag(TextAlignment.Top) && align.HasFlag(TextAlignment.Left))
{
return(DrawString(text, new Vector2(rect.X, rect.Y), realFontSize, color, coordinateType));
}
text = text.Replace("\r", "");
var rawTextMetrics = MeasureString(text, realFontSize, coordinateType);
var mMetrics = MeasureString("m", realFontSize, coordinateType);
float startY;
if (align.HasFlag(TextAlignment.Top))
{
startY = rect.Top;
}
else if (align.HasFlag(TextAlignment.VerticalCenter))
{
startY = rect.Top + rect.Height / 2 - rawTextMetrics.Size.Y / 2;
}
else
{
startY = rect.Bottom - rawTextMetrics.Size.Y;
}
var totalMetrics = new StringMetrics();
// break text into lines
var lines = text.Split('\n');
for (var i = 0; i < lines.Length; i++)
{
var line = lines[i];
float startX;
if (align.HasFlag(TextAlignment.Left))
{
startX = rect.X;
}
else
{
var lineMetrics = MeasureString(line, realFontSize, coordinateType);
startX = align.HasFlag(TextAlignment.HorizontalCenter) ?
rect.X + rect.Width / 2 - lineMetrics.Size.X / 2 :
rect.Right - lineMetrics.Size.X;
}
{
var lineMetrics = DrawString(line, new Vector2(startX, startY), realFontSize, color, coordinateType);
startY += mMetrics.Size.Y < 0 ?
Math.Min(lineMetrics.Size.Y, mMetrics.Size.Y) :
Math.Max(lineMetrics.Size.Y, mMetrics.Size.Y);
totalMetrics.Merge(lineMetrics);
}
}
return(totalMetrics);
}
private void IterateString(string text, Vector2 position, float angle, bool draw, float scale, Color4 color, CoordinateType coordinateType,
out StringMetrics metrics)
{
metrics = new StringMetrics();
float scalY = coordinateType == CoordinateType.SNorm ? -1 : 1;
var visualText = NBidi.NBidi.LogicalToVisual(text);
var codePoints = Helpers.ConvertToCodePointArray(visualText);
float sine, cosine;
if (angle != 0f)
{
sine = (float)Math.Sin(angle);
cosine = (float)Math.Cos(angle);
}
else
{
sine = cosine = 0f;
}
var x = 0f;
var y = Lazier.Create(() => Math.Abs(GetCharDescription('M').CharSize.Y *scale *scalY));
for (var i = 0; i < codePoints.Length; i++)
{
var c = codePoints[i];
var charDesc = GetCharDescription(c);
var charMetrics = charDesc.ToStringMetrics(position, scale, scale * scalY);
metrics.Merge(charMetrics);
if (c != '\r' && c != '\n')
{
if (draw)
{
var h = charMetrics.FullRectSize.Y;
if (h != 0 && charMetrics.FullRectSize.X != 0)
{
var fix = new Vector2(-charMetrics.OverhangLeft, -scalY * charMetrics.OverhangTop);
if (angle != 0f)
{
fix = SpriteRenderer.Rotate(fix, sine, cosine);
}
Sprite.Draw(charDesc.TableDescription.Srv, position + fix, charMetrics.FullRectSize,
Vector2.Zero, sine, cosine, charDesc.TexCoordsStart, charDesc.TexCoordsSize, color, coordinateType);
}
}
}
var delta = new Vector2(charMetrics.Size.X + KerningAdjustment, 0f);
switch (c)
{
case '\n':
delta.Y += y.Value;
goto case '\r';
case '\r':
delta.X = -x;
x = 0f;
break;
default:
x += delta.X;
break;
}
if (angle != 0f)
{
delta = SpriteRenderer.Rotate(delta, sine, cosine);
}
position += delta;
}
}
