// Compute outline for a single glyph
// if flatten is true convert curve into a list of segments
// out parameter advance is set to the default glyph advancement
// if embold <> 0, embold the outline by the desired strength
public Outline GetGlyphOutline(uint idx, out Outline.Point advance, bool flatten, float embold, int isteps)
{
// TODO: add outline caching ?
// load glyph for c in face slot
//int code = FT.FT_Load_Char(face_, (uint)c, FT.FT_LOAD_DEFAULT); // FT_LOAD_DEFAULT, FT_LOAD_NO_BITMAP, FT_LOAD_NO_SCALE ?
int code = FT.FT_Load_Glyph(face_, idx, FT.FT_LOAD_DEFAULT);
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(string.Format("Bad glyph format (0x{0:x4})", slotrec.format));
//throw new FTError("Bad glyph format (" + slotrec.format + ")");
}
// Get glyph outline in gptr
IntPtr gptr;
code = FT.FT_Get_Glyph(slotrec, out gptr);
FT.CheckError(code);
// Embold outline
if (embold != 0)
{
// Console.WriteLine("EMBOLD=" + embold);
// IntPtr optr = FT.fthelper_glyph_get_outline_address(slot);
FT.FT_Outline_Embolden(slotrec.outline, (int)(embold * 64 * 100)); // convert to 26.6 fractional format
}
// Decompose outline
Outline outline = null;
if (flatten)
{
outline = Outline.FlattenGlyph(slotrec, vectorScale_, isteps);
}
else
{
outline = Outline.DecomposeGlyph(slotrec, vectorScale_, isteps);
}
FT.FT_Done_Glyph(gptr);
advance = new Outline.Point(slotrec.advance, vectorScale_);
return(outline);
}
public unsafe UnityEngine.Texture2D RenderIntoTexture(char c)
{
int code;
FT.FT_FaceRec facerec = FT.HandleToRecord <FT.FT_FaceRec>(face_);
IntPtr slot = facerec.glyph;
code = FT.FT_Load_Char(face_, c, FT.FT_LOAD_RENDER /*|FT.FT_LOAD_TARGET_NORMAL*/);
if (code != 0)
{
return(null);
}
FT.FT_GlyphSlotRec slotrec = FT.HandleToRecord <FT.FT_GlyphSlotRec>(slot);
FTSharp.FT.FT_Bitmap ftbm = slotrec.bitmap;
UnityEngine.Texture2D texbuffer = new UnityEngine.Texture2D((int)ftbm.width, (int)ftbm.rows, UnityEngine.TextureFormat.ARGB32, false);
if (((int)ftbm.pixel_mode) != 2)
{
UnityEngine.Debug.LogError("Unsupported bitmap depth :" + ((int)ftbm.pixel_mode).ToString());
return(null);
}
// FT_PIXEL_MODE_MONO,
//FT_PIXEL_MODE_GRAY,
UnityEngine.Color32 [] clrs = texbuffer.GetPixels32();
int i = 0;
// UNSAFE DOES NOT WORK IN THE WEB PLAYER !
for (int y = 0; y < ftbm.rows; y++)
{
long j = (((ftbm.rows - (1 + y)) * ftbm.pitch));
byte *bo = ((byte *)ftbm.buffer);
for (int x = 0; x < ftbm.width; x++)
{
clrs[i].a = clrs[i].r = clrs[i].g = clrs[i].b = (bo[j + x]);
i++;
}
}
texbuffer.SetPixels32(clrs);
texbuffer.Apply();
return(texbuffer);
}
// 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);
}
float vectorScale_; // (point_size * resolution)/ (72 * face->units_per_em)
public Font(string path, float height, uint dpi)
{
lib = FTLibrary.Instance;
dpi_ = dpi;
int code = FT.FT_New_Face(lib.Handle, path, 0, out face_);
FT.CheckError(code);
FT.FT_FaceRec facerec = FT.HandleToRecord <FT.FT_FaceRec>(face_);
familyName_ = facerec.family_name;
styleName_ = facerec.style_name;
face_has_kerning_ = ((facerec.face_flags & FT.FT_FACE_FLAG_KERNING) != 0);
face_units_per_EM_ = facerec.units_per_EM;
face_height_ = facerec.height;
//Console.WriteLine("new FONT = unit-per-em=" + face_units_per_EM_);
//setCharSize(pointsize);
setCharHeight(height);
}
public void RenderText(string text, DrawBitmapF drawBitmap, int penx, int peny)
{
int code;
FT.FT_FaceRec facerec = FT.HandleToRecord <FT.FT_FaceRec>(face_);
IntPtr slot = facerec.glyph;
foreach (char c in text)
{
code = FT.FT_Load_Char(face_, c, FT.FT_LOAD_RENDER /*|FT.FT_LOAD_TARGET_NORMAL*/);
if (code != 0)
{
continue;
}
FT.FT_GlyphSlotRec slotrec = FT.HandleToRecord <FT.FT_GlyphSlotRec>(slot);
//Bitmap bitmap = new Bitmap(slotrec.bitmap);
// drawBitmap(bitmap, penx + slotrec.bitmap_left, peny + slotrec.bitmap_top);
//drawBitmap(bitmap, penx + slotrec.bitmap_left, peny - slotrec.bitmap_top);
drawBitmap(slotrec.bitmap, penx + slotrec.bitmap_left, peny - slotrec.bitmap_top);
penx += (slotrec.advance.x >> 6);
}
}
