private void IterateString(string text, STRVector position, bool draw, float scale, STRColor color, CoordinateType coordinateType, out StringMetrics metrics)
{
metrics = new StringMetrics();
STRVector startPosition = position;
float scalY = coordinateType == SpriteTextRenderer.CoordinateType.SNorm ? -1 : 1;
string visualText = NBidi.NBidi.LogicalToVisual(text);
int[] codePoints = Helpers.ConvertToCodePointArray(visualText);
foreach (int c in codePoints)
{
var charDesc = GetCharDescription(c);
var charMetrics = charDesc.ToStringMetrics(position, scale, scale * scalY);
if (draw)
{
if (charMetrics.FullRectSize.X != 0 && charMetrics.FullRectSize.Y != 0)
{
float posY = position.Y - scalY * charMetrics.OverhangTop;
float posX = position.X - charMetrics.OverhangLeft;
Sprite.Draw(charDesc.TableDescription.SRV, new STRVector(posX, posY), charMetrics.FullRectSize, STRVector.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;
}
}
}
private void IterateString(string text, Vector2 position, bool draw, float scale, Color4 color, CoordinateType coordinateType, out StringMetrics metrics)
{
metrics = new StringMetrics();
Vector2 startPosition = position;
float scalY = coordinateType == SpriteTextRenderer.CoordinateType.SNorm ? -1 : 1;
foreach (char c in text)
{
var charDesc = GetCharDescription(c);
var charMetrics = charDesc.ToStringMetrics(position, scale, scale * scalY);
if (draw)
{
if (charMetrics.FullRectSize.X != 0 && charMetrics.FullRectSize.Y != 0)
{
float posY = position.Y - scalY * charMetrics.OverhangTop;
float posX = position.X - charMetrics.OverhangLeft;
Sprite.Draw(charDesc.TableDescription.SRV, new Vector2(posX, posY), charMetrics.FullRectSize, 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;
}
}
}
private void IterateStringEm(string text, Vector2 position, bool Draw, float realFontSize, Color4 color, CoordinateType coordinateType, out StringMetrics metrics)
{
float scale = realFontSize / FontSize;
IterateString(text, position, Draw, scale, color, coordinateType, out metrics);
}
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 //Bottom
{
startY = rect.Bottom - rawTextMetrics.Size.Y;
}
var totalMetrics = new StringMetrics();
//break text into lines
var lines = text.Split('\n');
foreach (var line in lines)
{
float startX;
if (align.HasFlag(TextAlignment.Left))
{
startX = rect.X;
}
else
{
var lineMetrics = MeasureString(line, realFontSize, coordinateType);
if (align.HasFlag(TextAlignment.HorizontalCenter))
{
startX = rect.X + rect.Width / 2 - lineMetrics.Size.X / 2;
}
else //Right
{
startX = rect.Right - lineMetrics.Size.X;
}
}
var lineMetrics2 = DrawString(line, new Vector2(startX, startY), realFontSize, color, coordinateType);
float lineHeight;
if (mMetrics.Size.Y < 0)
{
lineHeight = Math.Min(lineMetrics2.Size.Y, mMetrics.Size.Y);
}
else
{
lineHeight = Math.Max(lineMetrics2.Size.Y, mMetrics.Size.Y);
}
startY += lineHeight;
totalMetrics.Merge(lineMetrics2);
}
return(totalMetrics);
}
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
bool xAxisFlipped = Size.X < 0;
bool yAxisFlipped = Size.Y < 0;
//Check, if axes of both instances point in the same direction
if (this.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 (this.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
float top = findTopMost(this.TopLeft.Y, second.TopLeft.Y);
float bottom = findBottomMost(this.TopLeft.Y + this.Size.Y, second.TopLeft.Y + second.Size.Y);
float left = findLeftMost(this.TopLeft.X, second.TopLeft.X);
float right = findRightMost(this.TopLeft.X + this.Size.X, second.TopLeft.X + second.Size.X);
//Find new overhangs
float topOverhangPos = findTopMost(this.FullRectTopLeft.Y, second.FullRectTopLeft.Y);
float bottomOverhangPos = findBottomMost(this.FullRectTopLeft.Y + this.FullRectSize.Y, second.FullRectTopLeft.Y + second.FullRectSize.Y);
float leftOverhangPos = findLeftMost(this.FullRectTopLeft.X, second.FullRectTopLeft.X);
float rightOverhangPos = findRightMost(this.FullRectTopLeft.X + this.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);
}