private void CreateCharacterGlyph(char lineCharacter, ref float totalGlyphWidth,
float lineStartX)
{
Glyph characterGlyph = GetGlyphFromDictionary(lineCharacter);
totalGlyphWidth += GetKerningFromDictionary(lineCharacter, lastGlyph);
var newDrawInfo = PlaceGlyphInLine(characterGlyph, lineStartX, totalGlyphWidth);
glyphs.Add(newDrawInfo);
lastDrawData = newDrawInfo;
totalGlyphWidth += (float)Math.Round(characterGlyph.AdvanceWidth);
lastGlyph = characterGlyph;
}
private void LoadGlyph(XmlData glyphData, Size fontMapSize)
{
char character = glyphData.GetAttributeValue("Character", ' ');
var glyph = new Glyph
{
UV = new Rectangle(glyphData.GetAttributeValue("UV")),
LeftSideBearing = glyphData.GetAttributeValue("LeftBearing", 0.0f),
RightSideBearing = glyphData.GetAttributeValue("RightBearing", 0.0f)
};
glyph.AdvanceWidth = glyphData.GetAttributeValue("AdvanceWidth", glyph.UV.Width - 2.0f);
glyph.PrecomputedFontMapUV = Rectangle.BuildUVRectangle(glyph.UV, fontMapSize);
GlyphDictionary.Add(character, glyph);
}
private Glyph ParseCharacter(Size maxTextPixelSize, bool isClipping, Glyph lastGlyph,
List<char> currentTextLine)
{
char character = parsedLine[characterIndex];
glyph = glyphDictionary[character];
float glyphWidth = glyph.AdvanceWidth;
glyphWidth += GetGlyphWidth(character, lastGlyph);
glyphWidth = GetNextFullPixel(glyphWidth);
glyphWidth += GetGlyphWidthOfNextCharacterInLine();
if (isClipping)
HandleClipping(maxTextPixelSize, currentTextLine, character, glyphWidth);
else
HandleNoClipping(currentTextLine, character, glyphWidth);
lastGlyph = glyph;
return lastGlyph;
}
private GlyphDrawData PlaceGlyphInLine(Glyph characterGlyph, float lineStartX,
float totalGlyphWidth)
{
var glyph = new GlyphDrawData();
var position =
new Vector2D((lineStartX + totalGlyphWidth + characterGlyph.LeftSideBearing).Round(),
lastDrawData.DrawArea.Top);
glyph.DrawArea = new Rectangle(position, characterGlyph.UV.Size);
glyph.UV = characterGlyph.PrecomputedFontMapUV;
return glyph;
}
private static int GetKerningFromDictionary(char textChar, Glyph lastGlyph)
{
int characterKerning;
return lastGlyph != null && lastGlyph.Kernings != null &&
lastGlyph.Kernings.TryGetValue(textChar, out characterKerning) ? characterKerning : 0;
}
private static int GetGlyphWidth(char character, Glyph lastGlyph)
{
int charKerning;
if (lastGlyph != null && lastGlyph.Kernings != null &&
lastGlyph.Kernings.TryGetValue(character, out charKerning))
return charKerning;
return 0;
}
public List<List<char>> SplitTextIntoLines(string text, Size maxTextPixelSize,
bool isClipping)
{
characterLines = new List<List<char>>();
if (String.IsNullOrEmpty(text))
return characterLines;
if (isClipping && IsFontFittingIntoHeight(maxTextPixelSize.Height))
return characterLines;
MaxTextLineWidth = 0.0f;
TextLineWidths = new List<float>();
parsedLines = parser.GetLines(text);
for (lineIndex = 0; lineIndex < parsedLines.Count; lineIndex++)
{
parsedLine = parsedLines[lineIndex];
var currentTextLine = new List<char>();
currentTextLineWidth = 0.0f;
currentWord = new List<char>();
currentWordWidth = 0.0f;
wordNumber = 0;
Glyph lastGlyph = null;
for (characterIndex = 0; characterIndex < parsedLine.Count; characterIndex++)
{
char character = parsedLine[characterIndex];
glyph = glyphDictionary[character];
float glyphWidth = glyph.AdvanceWidth;
glyphWidth += GetGlyphWidth(character, lastGlyph);
glyphWidth = GetNextFullPixel(glyphWidth);
glyphWidth += GetGlyphWidthOfNextCharacterInLine();
if (isClipping)
{
currentWord.Add(character);
if (!IsSpaceOrTab(character))
currentWordWidth += glyphWidth;
if (IsSpaceOrTab(character) || IsLastCharacterInLine())
{
if (IsEnoughSpaceForWordInCurrentLineAvailable(maxTextPixelSize) || wordNumber == 0)
{
currentTextLine.AddRange(currentWord);
currentTextLineWidth += currentWordWidth;
if (IsSpaceOrTab(character))
currentTextLineWidth += glyphWidth;
wordNumber++;
}
else
MoveRestOfLineToTheNextLine();
currentWord = new List<char>();
currentWordWidth = 0.0f;
}
}
else
{
currentTextLine.Add(character);
currentTextLineWidth += glyphWidth;
}
lastGlyph = glyph;
}
characterLines.Add(currentTextLine);
TextLineWidths.Add(currentTextLineWidth);
UpdateMaxTextLineWidth();
if (!IsEnoughSpaceForNextLineAvailable(isClipping, maxTextPixelSize))
break;
}
return characterLines;
}
