///////////////////////////////////////////////////////
| 526 | |
| 527 | //////////////////////////////////////////////////////////// |
| 528 | Glyph Font::loadGlyph(std::uint32_t id, unsigned int characterSize, bool bold, float outlineThickness) const |
| 529 | { |
| 530 | // The glyph to return |
| 531 | Glyph glyph; |
| 532 | |
| 533 | // Stop if no font is loaded |
| 534 | if (!m_fontHandles) |
| 535 | return glyph; |
| 536 | |
| 537 | // Get our FT_Face |
| 538 | FT_Face face = m_fontHandles->face; |
| 539 | if (!face) |
| 540 | return glyph; |
| 541 | |
| 542 | // Set the character size |
| 543 | if (!setCurrentSize(characterSize)) |
| 544 | return glyph; |
| 545 | |
| 546 | // Load the glyph corresponding to the code point |
| 547 | FT_Int32 flags = FT_LOAD_TARGET_NORMAL; |
| 548 | if (outlineThickness != 0) |
| 549 | flags |= FT_LOAD_NO_BITMAP; |
| 550 | if (FT_Load_Glyph(face, id, flags) != 0) |
| 551 | return glyph; |
| 552 | |
| 553 | // Retrieve the glyph |
| 554 | FT_Glyph glyphDesc = nullptr; |
| 555 | if (FT_Get_Glyph(face->glyph, &glyphDesc) != 0) |
| 556 | return glyph; |
| 557 | |
| 558 | // Apply bold and outline (there is no fallback for outline) if necessary -- first technique using outline (highest quality) |
| 559 | const FT_Pos weight = 1 << 6; |
| 560 | const bool outline = (glyphDesc->format == FT_GLYPH_FORMAT_OUTLINE); |
| 561 | if (outline) |
| 562 | { |
| 563 | if (bold) |
| 564 | { |
| 565 | auto* outlineGlyph = reinterpret_cast<FT_OutlineGlyph>(glyphDesc); |
| 566 | FT_Outline_Embolden(&outlineGlyph->outline, weight); |
| 567 | } |
| 568 | |
| 569 | if (outlineThickness != 0) |
| 570 | { |
| 571 | FT_Stroker stroker = m_fontHandles->stroker; |
| 572 | |
| 573 | FT_Stroker_Set(stroker, |
| 574 | static_cast<FT_Fixed>(outlineThickness * float{1 << 6}), |
| 575 | FT_STROKER_LINECAP_ROUND, |
| 576 | FT_STROKER_LINEJOIN_ROUND, |
| 577 | 0); |
| 578 | FT_Glyph_Stroke(&glyphDesc, stroker, true); |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | // Convert the glyph to a bitmap (i.e. rasterize it) |
| 583 | // Warning! After this line, do not read any data from glyphDesc directly, use |
| 584 | // bitmapGlyph.root to access the FT_Glyph data. |
| 585 | FT_Glyph_To_Bitmap(&glyphDesc, FT_RENDER_MODE_NORMAL, nullptr, 1); |