void BuildLine(OpenGLFont font, string text, int startIndex, float x, float y, float spaceAdjust)
{
for (int i = 0; i < text.Length; i++, startIndex++)
{
char c = text[i];
Glyphs[startIndex] = new GlyphPosition(x, y, font.CharacterWidths[c], font.myHeight);
FontCoords[startIndex] = font.TextureCoordinates[c];
x += font.CharacterWidths[c] - font.myLeadingSpace - font.myTrailingSpace;
if (c == ' ')
{
x += spaceAdjust;
}
short stripindex = (short)(startIndex * 4);
short index = (short)(startIndex * 6);
Indices[index] = stripindex;
Indices[index + 1] = (short)(stripindex + 1);
Indices[index + 2] = (short)(stripindex + 2);
Indices[index + 3] = (short)(stripindex + 2);
Indices[index + 4] = (short)(stripindex + 1);
Indices[index + 5] = (short)(stripindex + 3);
}
}
public GlyphRun(OpenGLFont font, string text, float sizeWidth, float sizeHeight, OpenGLTextAlignment alignment, bool autoEllipsis)
{
Font = font;
List <LineBreak> linebreaks = new List <LineBreak>();
string processingText = text;
int totalHeight = 0;
int totalWidth = 0;
int totalChars = 0;
int intWidth;
if (sizeWidth != float.PositiveInfinity)
{
intWidth = (int)sizeWidth;
}
else
{
intWidth = int.MaxValue;
}
int intHeight;
if (sizeHeight != float.PositiveInfinity)
{
intHeight = (int)sizeHeight;
}
else
{
intHeight = int.MaxValue;
}
LineBreak lineBreak = FitString(processingText, 0, intWidth);
while (lineBreak.Index != processingText.Length)
{
LineBreak nextBreak = FitString(processingText, lineBreak.Index, intWidth);
// see if this line needs ellipsis
if (Font.myHeight + Font.myHeight + totalHeight > intHeight && autoEllipsis)
{
string lineText = lineBreak.Text;
int ellipsisStart = lineText.Length - 3;
if (ellipsisStart < 0)
{
ellipsisStart = 0;
}
lineText = lineText.Substring(0, ellipsisStart) + "...";
lineBreak.Width = MeasureString(lineText);
lineBreak.Text = lineText;
break;
}
linebreaks.Add(lineBreak);
totalWidth = Math.Max(totalWidth, lineBreak.Width);
totalHeight += Font.myHeight;
totalChars += lineBreak.Text.Length;
lineBreak = nextBreak;
}
linebreaks.Add(lineBreak);
totalHeight += Font.myHeight;
totalWidth = Math.Max(totalWidth, lineBreak.Width);
totalChars += lineBreak.Text.Length;
myTriangleCount = totalChars * 2;
GlyphPosition[] rectangles = new GlyphPosition[totalChars];
GlyphTexCoords[] texCoords = new GlyphTexCoords[totalChars];
short[] indices = new short[totalChars * 6];
Glyphs = rectangles;
FontCoords = texCoords;
Indices = indices;
if (sizeWidth == float.PositiveInfinity)
{
myWidth = totalWidth;
}
else
{
myWidth = sizeWidth;
}
if (sizeHeight == float.PositiveInfinity)
{
myHeight = totalHeight;
}
else
{
myHeight = sizeHeight;
}
float y = 0;
int curChars = 0;
for (int i = 0; i < linebreaks.Count; i++)
{
LineBreak lbreak = linebreaks[i];
float x;
float spaceAdjust = 0;
string lbreakText = lbreak.Text;
switch (alignment)
{
case OpenGLTextAlignment.Left:
x = 0;
break;
case OpenGLTextAlignment.Right:
x = myWidth - lbreak.Width;
break;
case OpenGLTextAlignment.Center:
x = (myWidth - lbreak.Width) / 2;
break;
case OpenGLTextAlignment.Justified:
x = 0;
if (i != linebreaks.Count - 1)
{
lbreakText = lbreakText.TrimStart(' ').TrimEnd(' ');
int spaceCount = 0;
foreach (char c in lbreakText)
{
if (c == ' ')
{
spaceCount++;
}
}
int newWidth = MeasureString(lbreakText);
if (spaceCount != 0)
{
spaceAdjust = (myWidth - newWidth) / spaceCount;
}
}
break;
default:
throw new ArgumentException("Unknown alignment type.");
}
BuildLine(font, lbreakText, curChars, x, y, spaceAdjust);
y += Font.myHeight;
curChars += lbreakText.Length;
}
}