internal static CharLocation Create(BitmapChar bitmapChar, float scale = 1, float x = 0, float y = 0)
{
CharLocation charLocation = (CharLocation)_pool.GetObject();
charLocation.Char = bitmapChar;
charLocation.Scale = scale;
charLocation.X = x;
charLocation.Y = y;
return(charLocation);
}
/** Draws text into a QuadBatch. */
public void FillMeshBatch(MeshBatch meshBatch, float width, float height, string text,
TextFormat format, TextOptions options = null)
{
List <CharLocation> charLocations = ArrangeChars(
width, height, text, format, options);
int numChars = charLocations.Count;
_helperImage.Color = format.Color;
for (int i = 0; i < numChars; ++i)
{
CharLocation charLocation = charLocations[i];
_helperImage.Texture = charLocation.Char.Texture;
_helperImage.ReadjustSize();
_helperImage.X = charLocation.X;
_helperImage.Y = charLocation.Y;
_helperImage.Scale = charLocation.Scale;
meshBatch.AddMesh(_helperImage);
}
}
private List <CharLocation> ArrangeChars(float width, float height, string text, TextFormat format, TextOptions options)
{
if (text.Length == 0)
{
return(new List <CharLocation>());
}
if (options == null)
{
options = sDefaultOptions;
}
bool kerning = format.Kerning;
float leading = format.Leading;
HAlign hAlign = format.HorizontalAlign;
VAlign vAlign = format.VerticalAlign;
float fontSize = format.Size;
bool autoScale = options.AutoScale;
bool wordWrap = options.WordWrap;
bool finished = false;
CharLocation charLocation;
int numChars;
float containerWidth = 0;
float containerHeight = 0;
float scale = 0;
int i;
if (fontSize < 0f)
{
fontSize *= -Size;
}
float currentY = 0;
while (!finished)
{
sLines.Clear();
scale = fontSize / Size;
containerWidth = (width - 2 * Padding) / scale;
containerHeight = (height - 2 * Padding) / scale;
if (LineHeight <= containerHeight)
{
int lastWhiteSpace = -1;
int lastCharId = -1;
float currentX = 0;
currentY = 0;
List <CharLocation> currentLine = new List <CharLocation>();
numChars = text.Length;
for (i = 0; i < numChars; i++)
{
bool lineFull = false;
int charId = text[i]; // casting to int automatically returns the ASCII value
BitmapChar bitmapChar = GetChar(charId);
if (charId == CHAR_NEWLINE || charId == CHAR_CARRIAGE_RETURN)
{
lineFull = true;
}
else if (bitmapChar == null)
{
Debug.WriteLine("font " + Name + " missing character: " + text[i] + " ID:" + charId);
}
else
{
if (charId == CHAR_SPACE || charId == CHAR_TAB)
{
lastWhiteSpace = i;
}
if (kerning)
{
currentX += bitmapChar.GetKerning(lastCharId);
}
charLocation = CharLocation.Create(bitmapChar, 1.0f, currentX + bitmapChar.XOffset, currentY + bitmapChar.YOffset);
currentLine.Add(charLocation);
currentX += bitmapChar.XAdvance;
lastCharId = charId;
if (charLocation.X + bitmapChar.Width > containerWidth)
{
if (wordWrap)
{
// when autoscaling, we must not split a word in half -> restart
if (autoScale && lastWhiteSpace == -1)
{
break;
}
// remove characters and add them again to next line
int numCharsToRemove = lastWhiteSpace == -1 ? 1 : i - lastWhiteSpace;
currentLine.RemoveRange(currentLine.Count - numCharsToRemove, numCharsToRemove);
if (currentLine.Count == 0)
{
break;
}
i -= numCharsToRemove;
}
else
{
if (autoScale)
{
break;
}
currentLine.RemoveAt(currentLine.Count - 1);
// continue with next line, if there is one
while (i < numChars - 1 && text[i] != CHAR_NEWLINE)
{
++i;
}
}
lineFull = true;
}
}
if (i == numChars - 1)
{
sLines.Add(currentLine);
finished = true;
}
else if (lineFull)
{
sLines.Add(currentLine);
if (lastWhiteSpace == i)
{
currentLine.RemoveAt(currentLine.Count - 1);
}
if (currentY + leading + 2 * LineHeight <= containerHeight)
{
currentLine = new List <CharLocation>();
currentX = 0;
currentY += LineHeight + leading;
lastWhiteSpace = -1;
lastCharId = -1;
}
else
{
break;
}
}
}
}
if (autoScale && !finished && fontSize > 3)
{
fontSize -= 1;
}
else
{
finished = true;
}
}
List <CharLocation> finalLocations = new List <CharLocation>();
int numLines = sLines.Count;
float bottom = currentY + LineHeight;
int yOffset = 0;
if (vAlign == VAlign.Bottom)
{
yOffset = (int)(containerHeight - bottom);
}
else if (vAlign == VAlign.Center)
{
yOffset = (int)((containerHeight - bottom) / 2);
}
for (int lineId = 0; lineId < numLines; ++lineId)
{
var line = sLines[lineId];
numChars = line.Count;
if (numChars == 0)
{
continue;
}
int xOffset = 0;
CharLocation lastLocation = line[line.Count - 1];
float right = lastLocation.X - lastLocation.Char.XOffset + lastLocation.Char.XAdvance;
if (hAlign == HAlign.Right)
{
xOffset = (int)(containerWidth - right);
}
else if (hAlign == HAlign.Center)
{
xOffset = (int)((containerWidth - right) / 2);
}
for (int c = 0; c < numChars; ++c)
{
charLocation = line[c];
charLocation.X = scale * (charLocation.X + xOffset + OffsetX) + Padding;
charLocation.Y = scale * (charLocation.Y + yOffset + OffsetY) + Padding;
charLocation.Scale = scale;
if (charLocation.Char.Width > 0 && charLocation.Char.Height > 0)
{
finalLocations.Add(charLocation);
}
}
}
return(finalLocations);
}
