/// <summary>
/// finds FontGlyph in map and returns it, or null if none.
/// </summary>
/// <param name="codepoint"></param>
/// <returns></returns>
protected virtual FontGlyph FindFontGlyph(char codepoint)
{
FontGlyph fontGlyph = null;
d_cp_map.TryGetValue(codepoint, out fontGlyph);
return(fontGlyph);
}
//! Destructor.
// TODO: ~PixmapFont();
public void DefineMapping(char codepoint, string image_name, float horz_advance)
{
var image = ImageManager.GetSingleton().Get(d_imageNamePrefix + '/' + image_name);
var adv = (horz_advance == -1.0f)
? (float)(int)(image.GetRenderedSize().Width + image.GetRenderedOffset().X)
: horz_advance;
if (d_autoScaled != AutoScaledMode.Disabled)
{
adv *= d_origHorzScaling;
}
if (codepoint > d_maxCodepoint)
{
d_maxCodepoint = codepoint;
}
// create a new FontGlyph with given character code
var glyph = new FontGlyph(adv, image, true);
if (image.GetRenderedOffset().Y < -d_ascender)
{
d_ascender = -image.GetRenderedOffset().Y;
}
if (image.GetRenderedSize().Height + image.GetRenderedOffset().Y > -d_descender)
{
d_descender = -(image.GetRenderedSize().Height + image.GetRenderedOffset().Y);
}
d_height = d_ascender - d_descender;
// add glyph to the map
d_cp_map[codepoint] = glyph;
}
/// <summary>
/// initialise FontGlyph for given codepoint.
/// </summary>
/// <param name="cp"></param>
/// <param name="fontGlyph"></param>
private void InitialiseFontGlyph(char cp, FontGlyph fontGlyph)
{
// load-up required glyph metrics (don't render)
try
{
var glyphIdx = d_fontFace.GetCharIndex(cp);
d_fontFace.LoadGlyph(glyphIdx, LoadFlags.Default | LoadFlags.ForceAutohint, LoadTarget.Normal);
var adv = (float)d_fontFace.Glyph.Metrics.HorizontalAdvance * FT_POS_COEF;
fontGlyph.SetAdvance(adv);
fontGlyph.SetValid(true);
}
catch
{
}
}
private void InitialiseGlyphMap()
{
uint gindex;
uint codepoint = d_fontFace.GetFirstChar(out gindex);
uint maxCodepoint = codepoint;
while (gindex != 0)
{
if (maxCodepoint < codepoint)
{
maxCodepoint = codepoint;
}
d_cp_map[(char)codepoint] = new FontGlyph();
codepoint = d_fontFace.GetNextChar(codepoint, out gindex);
}
SetMaxCodepoint((char)maxCodepoint);
}
/// <summary>
/// Calculates and returns the size this glyph takes up if it is the last character, or
/// the size the glyph takes until the next character begins (considering kerning).
/// </summary>
/// <param name="currentCodePoint"></param>
/// <param name="nextCodePoint"></param>
/// <param name="isFollowedByAnotherCharacter"></param>
/// <param name="?"></param>
/// <param name="curExtent"></param>
/// <param name="advExtent"></param>
public void GetGlyphExtents(char currentCodePoint, char nextCodePoint, bool isFollowedByAnotherCharacter, ref float curExtent, ref float advExtent, float x_scale)
{
var currentGlyph = GetGlyphData(currentCodePoint);
if (currentGlyph != null)
{
FontGlyph nextGlyph = null;
if (isFollowedByAnotherCharacter)
{
nextGlyph = GetGlyphData(nextCodePoint);
}
var width = currentGlyph.GetRenderedAdvance(nextGlyph, x_scale);
if (advExtent + width > curExtent)
{
curExtent = advExtent + width;
}
advExtent += currentGlyph.GetAdvance(x_scale);
}
}