Method FallbackVisualRun

src/gfx_layout_fallback.cpp:112–135

* Create the visual run. * @param font The font to use for this run. * @param chars The characters to use for this run. * @param char_count The number of characters in this run. * @param char_offset This run's offset from the start of the layout input string. * @param x The initial x position for this run. */

 * @param x           The initial x position for this run.
 */
FallbackParagraphLayout::FallbackVisualRun::FallbackVisualRun(Font *font, const char32_t *chars, int char_count, int char_offset, int x) :
		font(font)
{
	const bool isbuiltin = font->fc->IsBuiltInFont();

	this->glyphs.reserve(char_count);
	this->glyph_to_char.reserve(char_count);
	this->positions.reserve(char_count);

	int advance = x;
	for (int i = 0; i < char_count; i++) {
		const GlyphID &glyph_id = this->glyphs.emplace_back(font->fc->MapCharToGlyph(chars[i]));
		int x_advance = font->fc->GetGlyphWidth(glyph_id);
		if (isbuiltin) {
			this->positions.emplace_back(advance, advance + x_advance - 1, font->fc->GetAscender()); // Apply sprite font's ascender.
		} else if (chars[i] >= SCC_SPRITE_START && chars[i] <= SCC_SPRITE_END) {
			this->positions.emplace_back(advance, advance + x_advance - 1, (font->fc->GetHeight() - ScaleSpriteTrad(FontCache::GetDefaultFontHeight(font->fc->GetSize()))) / 2); // Align sprite font to centre
		} else {
			this->positions.emplace_back(advance, advance + x_advance - 1, 0); // No ascender adjustment.
		}
		advance += x_advance;
		this->glyph_to_char.push_back(char_offset + i);
	}
}

/**
 * Get the height of the line.