Method CoreTextVisualRun

src/os/macosx/string_osx.cpp:233–265

}

CoreTextParagraphLayout::CoreTextVisualRun::CoreTextVisualRun(CTRunRef run, Font *font, const CoreTextParagraphLayoutFactory::CharType *buff) : font(font)
{
	this->glyphs.resize(CTRunGetGlyphCount(run));

	/* Query map of glyphs to source string index. */
	auto map = std::make_unique<CFIndex[]>(this->glyphs.size());
	CTRunGetStringIndices(run, CFRangeMake(0, 0), map.get());

	this->glyph_to_char.resize(this->glyphs.size());
	for (size_t i = 0; i < this->glyph_to_char.size(); i++) this->glyph_to_char[i] = (int)map[i];

	auto pts = std::make_unique<CGPoint[]>(this->glyphs.size());
	CTRunGetPositions(run, CFRangeMake(0, 0), pts.get());
	auto advs = std::make_unique<CGSize[]>(this->glyphs.size());
	CTRunGetAdvances(run, CFRangeMake(0, 0), advs.get());
	this->positions.reserve(this->glyphs.size());

	/* Convert glyph array to our data type. At the same time, substitute
	 * the proper glyphs for our private sprite glyphs. */
	auto gl = std::make_unique<CGGlyph[]>(this->glyphs.size());
	CTRunGetGlyphs(run, CFRangeMake(0, 0), gl.get());
	for (size_t i = 0; i < this->glyphs.size(); i++) {
		if (buff[this->glyph_to_char[i]] >= SCC_SPRITE_START && buff[this->glyph_to_char[i]] <= SCC_SPRITE_END && (gl[i] == 0 || gl[i] == 3)) {
			/* A glyph of 0 indicates not found, while apparently 3 is what char 0xFFFC maps to. */
			this->glyphs[i] = font->fc->MapCharToGlyph(buff[this->glyph_to_char[i]]);
			this->positions.emplace_back(pts[i].x, pts[i].x + advs[i].width - 1, (font->fc->GetHeight() - ScaleSpriteTrad(FontCache::GetDefaultFontHeight(font->fc->GetSize()))) / 2); // Align sprite font to centre
		} else {
			this->glyphs[i] = gl[i];
			this->positions.emplace_back(pts[i].x, pts[i].x + advs[i].width - 1, pts[i].y);
		}
	}
	this->total_advance = (int)std::ceil(CTRunGetTypographicBounds(run, CFRangeMake(0, 0), nullptr, nullptr, nullptr));
}

/**
 * Get the height of the line.