bool Font::insertGlyph(Char character) {
FT_Error error;
FT_UInt glyphIndex = FT_Get_Char_Index(face, character);
if(!glyphIndex) {
insertPlaceholderGlyph(character);
return false;
}
error = FT_Load_Glyph(face, glyphIndex, FT_LOAD_FORCE_AUTOHINT);
if(error) {
insertPlaceholderGlyph(character);
return false;
}
error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL);
if(error) {
insertPlaceholderGlyph(character);
return false;
}
// Fill in info for this glyph.
Glyph & glyph = glyphs[character];
glyph.index = glyphIndex;
glyph.size.x = face->glyph->bitmap.width;
glyph.size.y = face->glyph->bitmap.rows;
glyph.advance.x = face->glyph->linearHoriAdvance / 65536.0f;
glyph.advance.y = face->glyph->linearVertAdvance / 65536.0f;
glyph.lsb_delta = face->glyph->lsb_delta;
glyph.rsb_delta = face->glyph->rsb_delta;
glyph.draw_offset.x = face->glyph->bitmap_left;
glyph.draw_offset.y = face->glyph->bitmap_top - face->glyph->bitmap.rows;
glyph.uv_start = Vec2f_ZERO;
glyph.uv_end = Vec2f_ZERO;
glyph.texture = 0;
// Some glyphs like spaces have a size of 0...
if(glyph.size.x != 0 && glyph.size.y != 0) {
Image imgGlyph;
imgGlyph.Create(glyph.size.x, glyph.size.y, Image::Format_A8);
FT_Bitmap * srcBitmap = &face->glyph->bitmap;
arx_assert(srcBitmap->pitch >= 0);
arx_assert(unsigned(srcBitmap->pitch) == unsigned(srcBitmap->width));
// Copy pixels
unsigned char * src = srcBitmap->buffer;
unsigned char * dst = imgGlyph.GetData();
memcpy(dst, src, glyph.size.x * glyph.size.y);
Vec2i offset;
if(!textures->insertImage(imgGlyph, glyph.texture, offset)) {
LogWarning << "Could not upload glyph for character U+" << std::hex << character
<< " (" << util::encode<util::UTF8>(character) << ") in font "
<< info.name;
insertPlaceholderGlyph(character);
return false;
}
// Compute UV mapping for each glyph.
const float textureSize = textures->getTextureSize();
glyph.uv_start = Vec2f(offset) / Vec2f(textureSize);
glyph.uv_end = Vec2f(offset + glyph.size) / Vec2f(textureSize);
}
return true;
}
bool Font::insertGlyph(Char character) {
if(!m_size) {
insertPlaceholderGlyph(character);
return false;
}
FT_UInt glyphIndex = FT_Get_Char_Index(m_size->face, character);
if(!glyphIndex) {
insertPlaceholderGlyph(character);
return false;
}
FT_Int32 flags = FT_LOAD_TARGET_LIGHT;
if(m_info.weight != 0) {
flags |= FT_LOAD_FORCE_AUTOHINT;
}
if(FT_Load_Glyph(m_size->face, glyphIndex, flags)) {
insertPlaceholderGlyph(character);
return false;
}
FT_GlyphSlot ftGlyph = m_size->face->glyph;
if(m_info.weight != 0 && ftGlyph->format == FT_GLYPH_FORMAT_OUTLINE) {
FT_Pos strength = FT_MulFix(m_size->face->units_per_EM, m_size->metrics.y_scale) / 24 * m_info.weight / 4;
FT_Outline_Embolden(&ftGlyph->outline, strength);
}
if(FT_Render_Glyph(ftGlyph, FT_RENDER_MODE_NORMAL)) {
insertPlaceholderGlyph(character);
return false;
}
// Fill in info for this glyph.
Glyph & glyph = m_glyphs[character];
glyph.index = glyphIndex;
glyph.size.x = ftGlyph->bitmap.width;
glyph.size.y = ftGlyph->bitmap.rows;
glyph.advance.x = float(ftGlyph->linearHoriAdvance) / 65536.f;
glyph.advance.y = float(ftGlyph->linearVertAdvance) / 65536.f;
glyph.lsb_delta = ftGlyph->lsb_delta;
glyph.rsb_delta = ftGlyph->rsb_delta;
glyph.draw_offset.x = ftGlyph->bitmap_left;
glyph.draw_offset.y = ftGlyph->bitmap_top - ftGlyph->bitmap.rows;
glyph.uv_start = Vec2f(0.f);
glyph.uv_end = Vec2f(0.f);
glyph.texture = 0;
// Some glyphs like spaces have a size of 0...
if(glyph.size.x != 0 && glyph.size.y != 0) {
Image imgGlyph;
imgGlyph.create(size_t(glyph.size.x), size_t(glyph.size.y), Image::Format_A8);
FT_Bitmap & srcBitmap = ftGlyph->bitmap;
arx_assert(srcBitmap.pitch >= 0);
arx_assert(unsigned(srcBitmap.pitch) == unsigned(srcBitmap.width));
// Copy pixels
unsigned char * src = srcBitmap.buffer;
unsigned char * dst = imgGlyph.getData();
memcpy(dst, src, glyph.size.x * glyph.size.y);
Vec2i offset;
if(!m_textures->insertImage(imgGlyph, glyph.texture, offset)) {
LogWarning << "Could not upload glyph for character U+" << std::hex << character
<< " (" << util::encode<util::UTF8>(character) << ") in font "
<< m_info.name;
insertPlaceholderGlyph(character);
return false;
}
// Compute UV mapping for each glyph.
const float textureSize = float(m_textures->getTextureSize());
glyph.uv_start = Vec2f(offset) / Vec2f(textureSize);
glyph.uv_end = Vec2f(offset + glyph.size) / Vec2f(textureSize);
}
return true;
}
