public void Merge(BBox b)
{
xMin = Math.Min(xMin, b.xMin);
yMin = Math.Min(yMin, b.yMin);
xMax = Math.Max(xMax, b.xMax);
yMax = Math.Max(yMax, b.yMax);
}
// Compute the Bounding Box of multilines
public BBox Measure(string[] lines, float interline)
{
Outline.Point position = new Outline.Point(); // start at 0,0
Outline.Point lineTransition = new Outline.Point(0, -Height * interline);
BBox bbox = new BBox();
foreach (string line in lines)
{
BBox lbox = Measure(line);
lbox.Translate(position);
bbox.Merge(lbox);
position.Translate(lineTransition);
}
return(bbox);
}
public Outline GetTextOutline(string[] lines, ref Outline.Point position, HorizontalJustification h, VerticalJustification v, bool useKerning, float interline)
{
//int nblines = lines.Length;
// total cbox
BBox bbox = Measure(lines, interline);
float startY = 0;
switch (v)
{
case VerticalJustification.Origin:
startY = position.Y;
break;
case VerticalJustification.Top:
startY = position.Y - bbox.yMax;
break;
case VerticalJustification.Bottom:
startY = position.Y - bbox.yMin;
break;
case VerticalJustification.Center:
startY = position.Y + (bbox.yMax - bbox.yMin) / 2 - bbox.yMax;
break;
}
Outline outline = new Outline();
Outline.Point pos = new Outline.Point();
foreach (string line in lines)
{
pos.X = position.X;
pos.Y = startY;
Outline o = GetStringOutline(line, ref pos, h, VerticalJustification.Origin, useKerning);
outline.AddOutline(o);
startY -= Height * interline;
}
return(outline);
}
// Compute the Bounding Box a text line
public BBox Measure(string txt)
{
BBox bbox = new BBox();
Outline.Point advance = new Outline.Point();
foreach (char c in txt)
{
Outline.Point cadv;
BBox cbbox = Measure(c, out cadv);
// translate char bbox to total advancement so far
cbbox.Translate(advance);
bbox.Merge(cbbox);
// add char adv to total adv
advance.Translate(cadv);
}
return(bbox);
}
// Compute the Bounding box of a single glyph
public BBox Measure(char c, out Outline.Point advance)
{
// load glyph for c in face slot
int code = FT.FT_Load_Char(face_, (uint)c, (int)(FT.FT_LOAD_DEFAULT | (1 << 3))); // FT_LOAD_DEFAULT, FT_LOAD_NO_BITMAP, FT_LOAD_NO_SCALE ?
FT.CheckError(code);
// Check that the glyph is in Outline format
FT.FT_FaceRec facerec = FT.HandleToRecord <FT.FT_FaceRec>(face_);
IntPtr slot = facerec.glyph;
FT.FT_GlyphSlotRec slotrec = FT.HandleToRecord <FT.FT_GlyphSlotRec>(slot);
if (slotrec.format != FT.GLYPH_FORMAT_OUTLINE)
{
throw new FTError("Bad glyph format (" + slotrec.format + ")");
}
// get glyph in gptr
IntPtr gptr;
code = FT.FT_Get_Glyph(slotrec, out gptr);
FT.CheckError(code);
FT.FT_BBox ft_bbox;
FT.FT_Glyph_Get_CBox(gptr, 0, out ft_bbox);
FT.FT_Done_Glyph(gptr);
BBox bbox = new BBox(ft_bbox, vectorScale_);
advance = new Outline.Point(slotrec.advance, vectorScale_);
return(bbox);
}
// Compute the outline for a whole line
public Outline GetStringOutline(string txt, ref Outline.Point position, HorizontalJustification h, VerticalJustification v, bool useKerning, float spacing, float emboldStrenght, int isteps)
{
Outline res = new Outline();
// first set pen position according to requested text justification
if (h != HorizontalJustification.Origin || v != VerticalJustification.Origin)
{
// Compute Bounding box and set original advancement according to justification
BBox bbox = Measure(txt);
switch (h)
{
case HorizontalJustification.Left:
position.X = position.X - bbox.xMin;
break;
case HorizontalJustification.Right:
position.X = position.X - bbox.xMax;
break;
case HorizontalJustification.Center:
position.X = position.X - (bbox.xMin + bbox.xMax) / 2;
break;
}
switch (v)
{
case VerticalJustification.Top:
position.Y = position.Y - bbox.yMax;
break;
case VerticalJustification.Bottom:
position.Y = position.Y - bbox.yMin;
break;
case VerticalJustification.Center:
position.Y = position.Y - (bbox.yMin + bbox.yMax) / 2;
break;
}
}
// Console.WriteLine("Original pen position=" + position);
if (!HasKerning)
{
useKerning = false;
}
uint prev = 0;
for (int i = 0; i < txt.Length; ++i)
{
uint idx = (uint)FT.FT_Get_Char_Index(face_, txt[i]);
if (useKerning && prev != 0 && idx != 0) // adjust with kerning properties
{
position.Translate(GetKerning((uint)prev, idx));
}
Outline.Point adv;
Outline o = GetGlyphOutline(idx, out adv, true, emboldStrenght, isteps);
o.Translate(position);
res.AddOutline(o);
adv.Scale(spacing);
position.Translate(adv);
prev = idx;
}
/*
* foreach (char c in txt)
* {
* Outline.Point adv;
* Outline o = GetGlyphOutline(c, out adv, true);
* o.Translate(advance);
* res.AddOutline(o);
* advance.Translate(adv);
* }
*/
return(res);
}
// Compute the Bounding Box of multilines
public BBox Measure(string[] lines, float interline)
{
Outline.Point position = new Outline.Point(); // start at 0,0
Outline.Point lineTransition = new Outline.Point(0, - Height * interline);
BBox bbox = new BBox();
foreach (string line in lines)
{
BBox lbox = Measure(line);
lbox.Translate(position);
bbox.Merge(lbox);
position.Translate(lineTransition);
}
return bbox;
}
// Compute the Bounding Box a text line
public BBox Measure(string txt)
{
BBox bbox = new BBox();
Outline.Point advance = new Outline.Point();
foreach (char c in txt)
{
Outline.Point cadv;
BBox cbbox = Measure(c, out cadv);
// translate char bbox to total advancement so far
cbbox.Translate(advance);
bbox.Merge(cbbox);
// add char adv to total adv
advance.Translate(cadv);
}
return bbox;
}
// Compute the Bounding box of a single glyph
public BBox Measure(char c, out Outline.Point advance)
{
// load glyph for c in face slot
int code = FT.FT_Load_Char(face_, (uint)c, (int)(FT.FT_LOAD_DEFAULT|( 1 << 3 ))); // FT_LOAD_DEFAULT, FT_LOAD_NO_BITMAP, FT_LOAD_NO_SCALE ?
FT.CheckError(code);
// Check that the glyph is in Outline format
FT.FT_FaceRec facerec = FT.HandleToRecord<FT.FT_FaceRec>(face_);
IntPtr slot = facerec.glyph;
FT.FT_GlyphSlotRec slotrec = FT.HandleToRecord<FT.FT_GlyphSlotRec>(slot);
if (slotrec.format != FT.GLYPH_FORMAT_OUTLINE)
{
throw new FTError("Bad glyph format (" + slotrec.format + ")");
}
// get glyph in gptr
IntPtr gptr;
code = FT.FT_Get_Glyph(slot, out gptr);
FT.CheckError(code);
FT.FT_BBox ft_bbox;
FT.FT_Glyph_Get_CBox(gptr, 0, out ft_bbox);
FT.FT_Done_Glyph(gptr);
BBox bbox = new BBox(ft_bbox, vectorScale_);
advance = new Outline.Point(slotrec.advance, vectorScale_);
return bbox;
}
