bool HarfBuzzShaper::shapeHarfBuzzRuns(bool shouldSetDirection) { HarfBuzzScopedPtr<hb_buffer_t> harfBuzzBuffer(hb_buffer_create(), hb_buffer_destroy); hb_buffer_set_unicode_funcs(harfBuzzBuffer.get(), hb_icu_get_unicode_funcs()); for (unsigned i = 0; i < m_harfBuzzRuns.size(); ++i) { unsigned runIndex = m_run.rtl() ? m_harfBuzzRuns.size() - i - 1 : i; HarfBuzzRun* currentRun = m_harfBuzzRuns[runIndex].get(); const SimpleFontData* currentFontData = currentRun->fontData(); if (currentFontData->isSVGFont()) return false; hb_buffer_set_script(harfBuzzBuffer.get(), currentRun->script()); if (shouldSetDirection) hb_buffer_set_direction(harfBuzzBuffer.get(), currentRun->rtl() ? HB_DIRECTION_RTL : HB_DIRECTION_LTR); else // Leaving direction to HarfBuzz to guess is *really* bad, but will do for now. hb_buffer_guess_segment_properties(harfBuzzBuffer.get()); // Add a space as pre-context to the buffer. This prevents showing dotted-circle // for combining marks at the beginning of runs. static const uint16_t preContext = ' '; hb_buffer_add_utf16(harfBuzzBuffer.get(), &preContext, 1, 1, 0); if (m_font->isSmallCaps() && u_islower(m_normalizedBuffer[currentRun->startIndex()])) { String upperText = String(m_normalizedBuffer.get() + currentRun->startIndex(), currentRun->numCharacters()); upperText.makeUpper(); currentFontData = m_font->glyphDataForCharacter(upperText[0], false, SmallCapsVariant).fontData; hb_buffer_add_utf16(harfBuzzBuffer.get(), upperText.characters(), currentRun->numCharacters(), 0, currentRun->numCharacters()); } else hb_buffer_add_utf16(harfBuzzBuffer.get(), m_normalizedBuffer.get() + currentRun->startIndex(), currentRun->numCharacters(), 0, currentRun->numCharacters()); FontPlatformData* platformData = const_cast<FontPlatformData*>(¤tFontData->platformData()); HarfBuzzFace* face = platformData->harfBuzzFace(); if (!face) return false; if (m_font->fontDescription().orientation() == Vertical) face->setScriptForVerticalGlyphSubstitution(harfBuzzBuffer.get()); HarfBuzzScopedPtr<hb_font_t> harfBuzzFont(face->createFont(), hb_font_destroy); hb_shape(harfBuzzFont.get(), harfBuzzBuffer.get(), m_features.isEmpty() ? 0 : m_features.data(), m_features.size()); currentRun->applyShapeResult(harfBuzzBuffer.get()); setGlyphPositionsForHarfBuzzRun(currentRun, harfBuzzBuffer.get()); hb_buffer_reset(harfBuzzBuffer.get()); } return true; }
bool HarfBuzzShaper::shape(GlyphBuffer* glyphBuffer) { m_totalWidth = 0; while (setupHarfBuzzRun()) { if (!shapeHarfBuzzRun()) return false; setGlyphPositionsForHarfBuzzRun(glyphBuffer); } if (!m_harfbuzzRuns.size()) return false; return true; }
bool HarfBuzzShaper::shapeHarfBuzzRuns() { HarfBuzzScopedPtr<hb_buffer_t> harfbuzzBuffer(hb_buffer_create(), hb_buffer_destroy); hb_buffer_set_unicode_funcs(harfbuzzBuffer.get(), hb_icu_get_unicode_funcs()); if (m_run.rtl() || m_run.directionalOverride()) hb_buffer_set_direction(harfbuzzBuffer.get(), m_run.rtl() ? HB_DIRECTION_RTL : HB_DIRECTION_LTR); for (unsigned i = 0; i < m_harfbuzzRuns.size(); ++i) { unsigned runIndex = m_run.rtl() ? m_harfbuzzRuns.size() - i - 1 : i; HarfBuzzRun* currentRun = m_harfbuzzRuns[runIndex].get(); const SimpleFontData* currentFontData = currentRun->fontData(); if (m_font->isSmallCaps() && u_islower(m_normalizedBuffer[currentRun->startIndex()])) { String upperText = String(m_normalizedBuffer.get() + currentRun->startIndex(), currentRun->numCharacters()); upperText.makeUpper(); currentFontData = m_font->glyphDataForCharacter(upperText[0], false, SmallCapsVariant).fontData; hb_buffer_add_utf16(harfbuzzBuffer.get(), upperText.characters(), currentRun->numCharacters(), 0, currentRun->numCharacters()); } else hb_buffer_add_utf16(harfbuzzBuffer.get(), m_normalizedBuffer.get() + currentRun->startIndex(), currentRun->numCharacters(), 0, currentRun->numCharacters()); FontPlatformData* platformData = const_cast<FontPlatformData*>(¤tFontData->platformData()); HarfBuzzNGFace* face = platformData->harfbuzzFace(); if (!face) return false; HarfBuzzScopedPtr<hb_font_t> harfbuzzFont(face->createFont(), hb_font_destroy); hb_shape(harfbuzzFont.get(), harfbuzzBuffer.get(), m_features.isEmpty() ? 0 : m_features.data(), m_features.size()); currentRun->applyShapeResult(harfbuzzBuffer.get()); setGlyphPositionsForHarfBuzzRun(currentRun, harfbuzzBuffer.get()); hb_buffer_reset(harfbuzzBuffer.get()); if (m_run.rtl() || m_run.directionalOverride()) hb_buffer_set_direction(harfbuzzBuffer.get(), m_run.rtl() ? HB_DIRECTION_RTL : HB_DIRECTION_LTR); } return true; }