LLFontGlyphInfo* LLFontFreetype::addGlyph(llwchar wch) const
{
if (mFTFace == NULL)
return FALSE;
llassert(!mIsFallback);
//lldebugs << "Adding new glyph for " << wch << " to font" << llendl;
FT_UInt glyph_index;
// Initialize char to glyph map
glyph_index = FT_Get_Char_Index(mFTFace, wch);
if (glyph_index == 0)
{
//llinfos << "Trying to add glyph from fallback font!" << llendl;
font_vector_t::const_iterator iter;
for(iter = mFallbackFonts.begin(); iter != mFallbackFonts.end(); iter++)
{
glyph_index = FT_Get_Char_Index((*iter)->mFTFace, wch);
if (glyph_index)
{
return addGlyphFromFont(*iter, wch, glyph_index);
}
}
}
char_glyph_info_map_t::iterator iter = mCharGlyphInfoMap.find(wch);
if (iter == mCharGlyphInfoMap.end())
{
return addGlyphFromFont(this, wch, glyph_index);
}
return NULL;
}
void LLFontFreetype::resetBitmapCache()
{
for_each(mCharGlyphInfoMap.begin(), mCharGlyphInfoMap.end(), DeletePairedPointer());
mCharGlyphInfoMap.clear();
mFontBitmapCachep->reset();
// Adding default glyph is skipped for fallback fonts here as well as in loadFace().
// This if was added as fix for EXT-4971.
if(!mIsFallback)
{
// Add the empty glyph
addGlyphFromFont(this, 0, 0);
}
}
BOOL LLFont::addChar(const llwchar wch) const
{
if (mFTFace == NULL)
return FALSE;
llassert(!mIsFallback);
//lldebugs << "Adding new glyph for " << wch << " to font" << llendl;
FT_UInt glyph_index;
// Initialize char to glyph map
glyph_index = FT_Get_Char_Index(mFTFace, wch);
if (glyph_index == 0)
{
// Try looking it up in the backup Unicode font
if (mFallbackFontp)
{
//llinfos << "Trying to add glyph from fallback font!" << llendl
LLFontList::iterator iter;
for(iter = mFallbackFontp->begin(); iter != mFallbackFontp->end(); iter++)
{
glyph_index = FT_Get_Char_Index((*iter)->mFTFace, wch);
if (glyph_index)
{
addGlyphFromFont(*iter, wch, glyph_index);
return TRUE;
}
}
}
}
char_glyph_info_map_t::iterator iter = mCharGlyphInfoMap.find(wch);
if (iter == mCharGlyphInfoMap.end() || !(iter->second->mIsRendered))
{
BOOL result = addGlyph(wch, glyph_index);
return result;
}
return FALSE;
}
BOOL LLFontFreetype::loadFace(const std::string& filename, const F32 point_size, const F32 vert_dpi, const F32 horz_dpi, const S32 components, BOOL is_fallback)
{
// Don't leak face objects. This is also needed to deal with
// changed font file names.
if (mFTFace)
{
FT_Done_Face(mFTFace);
mFTFace = NULL;
}
llinfos << "Loading font file: " << filename << llendl;
int error;
error = FT_New_Face( gFTLibrary,
filename.c_str(),
0,
&mFTFace );
if (error)
{
return FALSE;
}
mIsFallback = is_fallback;
F32 pixels_per_em = (point_size / 72.f)*vert_dpi; // Size in inches * dpi
error = FT_Set_Char_Size(mFTFace, /* handle to face object */
0, /* char_width in 1/64th of points */
(S32)(point_size*64), /* char_height in 1/64th of points */
(U32)horz_dpi, /* horizontal device resolution */
(U32)vert_dpi); /* vertical device resolution */
if (error)
{
// Clean up freetype libs.
FT_Done_Face(mFTFace);
mFTFace = NULL;
return FALSE;
}
F32 y_max, y_min, x_max, x_min;
F32 ems_per_unit = 1.f/ mFTFace->units_per_EM;
F32 pixels_per_unit = pixels_per_em * ems_per_unit;
// Get size of bbox in pixels
y_max = mFTFace->bbox.yMax * pixels_per_unit;
y_min = mFTFace->bbox.yMin * pixels_per_unit;
x_max = mFTFace->bbox.xMax * pixels_per_unit;
x_min = mFTFace->bbox.xMin * pixels_per_unit;
mAscender = mFTFace->ascender * pixels_per_unit;
mDescender = -mFTFace->descender * pixels_per_unit;
mLineHeight = mFTFace->height * pixels_per_unit;
S32 max_char_width = llround(0.5f + (x_max - x_min));
S32 max_char_height = llround(0.5f + (y_max - y_min));
mFontBitmapCachep->init(components, max_char_width, max_char_height);
if (!mFTFace->charmap)
{
//llinfos << " no unicode encoding, set whatever encoding there is..." << llendl;
FT_Set_Charmap(mFTFace, mFTFace->charmaps[0]);
}
if (!mIsFallback || !sOpenGLcrashOnRestart) // because this often crashes under Linux...
{
// Add the default glyph
addGlyphFromFont(this, 0, 0);
}
mName = filename;
mPointSize = point_size;
return TRUE;
}
BOOL LLFont::addGlyph(const llwchar wch, const U32 glyph_index) const
{
return addGlyphFromFont(this, wch, glyph_index);
}