Font::Font(const res::path & fontFile, unsigned int fontSize, FT_Face face)
: info(fontFile, fontSize)
, referenceCount(0)
, face(face)
, textures(0) {
// TODO-font: Compute optimal size using m_FTFace->bbox
const unsigned int TEXTURE_SIZE = 512;
// Insert all the glyphs into texture pages
textures = new PackedTexture(TEXTURE_SIZE, Image::Format_A8);
// Insert the replacement characters first as they may be needed if others are missing
insertGlyph('?');
insertGlyph(util::REPLACEMENT_CHAR);
// Pre-load glyphs for displayable ASCII characters
for(Char chr = 32; chr < FONT_PRELOAD_LIMIT; ++chr) {
if(chr != '?') {
insertGlyph(chr);
}
}
textures->upload();
}
Font::Font(const res::path & file, unsigned size, unsigned weight, FT_Face face)
: m_info(file, size, weight)
, m_referenceCount(0)
, m_size(NULL)
, m_textures(NULL) {
FT_New_Size(face, &m_size);
FT_Activate_Size(m_size);
// Windows default is 96dpi
// FreeType default is 72dpi
FT_Set_Char_Size(m_size->face, 0, m_info.size * 64, 64, 64);
// TODO Compute optimal size using m_FTFace->bbox
const unsigned int TEXTURE_SIZE = 512;
// Insert all the glyphs into texture pages
m_textures = new PackedTexture(TEXTURE_SIZE, Image::Format_A8);
// Insert the replacement characters first as they may be needed if others are missing
insertGlyph('?');
insertGlyph(util::REPLACEMENT_CHAR);
// Pre-load glyphs for displayable ASCII characters
for(Char chr = 32; chr < FONT_PRELOAD_LIMIT; ++chr) {
if(chr != '?') {
insertGlyph(chr);
}
}
m_textures->upload();
}
Font::glyph_iterator Font::getNextGlyph(text_iterator & it, text_iterator end) {
Char chr = util::UTF8::read(it, end);
if(chr == util::INVALID_CHAR) {
return glyphs.end();
}
glyph_iterator glyph = glyphs.find(chr);
if(glyph != glyphs.end()) {
return glyph; // an existing glyph
}
if(chr < FONT_PRELOAD_LIMIT) {
// We pre-load all glyphs for ASCII characters, so there is no point in checking again
return glyphs.end();
}
if(!insertGlyph(chr)) {
// No new glyph was inserted but the character was mapped to an existing one
return glyphs.find(chr);
}
arx_assert(glyphs.find(chr) != glyphs.end());
// As we need to re-upload the textures now, first check for more missing glyphs
insertMissingGlyphs(it, end);
// Re-upload the changed textures
textures->upload();
return glyphs.find(chr); // the newly inserted glyph
}
/** Update the supported characters for this font if required.
*/
void FontWithFace::updateCharactersList()
{
if (m_fallback_font != NULL)
m_fallback_font->updateCharactersList();
if (m_new_char_holder.empty()) return;
for (const wchar_t& c : m_new_char_holder)
{
const GlyphInfo& gi = getGlyphInfo(c);
insertGlyph(c, gi);
}
m_new_char_holder.clear();
} // updateCharactersList
bool Font::insertMissingGlyphs(text_iterator begin, text_iterator end) {
Char chr;
bool changed = false;
for(text_iterator it = begin; (chr = util::UTF8::read(it, end)) != util::INVALID_CHAR; ) {
if(glyphs.find(chr) == glyphs.end()) {
if(chr >= FONT_PRELOAD_LIMIT && insertGlyph(chr)) {
changed = true;
}
}
}
return changed;
}
// ----------------------------------------------------------------------------
void FontWithFace::updateCharactersList()
{
if (m_fallback_font != NULL)
m_fallback_font->updateCharactersList();
if (m_new_char_holder.empty()) return;
for (const wchar_t& c : m_new_char_holder)
{
const GlyphInfo& gi = getGlyphInfo(c);
insertGlyph(c, gi);
}
m_new_char_holder.clear();
// Update last glyph page
video::ITexture* page_texture = irr_driver->getVideoDriver()
->addTexture("Glyph_page", m_page);
m_spritebank->setTexture(m_spritebank->getTextureCount() - 1,
page_texture);
irr_driver->getVideoDriver()->removeTexture(page_texture);
assert(page_texture->getReferenceCount() == 1);
} // updateCharactersList