Method LoadFont

src/SFGUI/Renderer.cpp:530–577

/// @cond

sf::Vector2f Renderer::LoadFont( const sf::Font& font, unsigned int size ) {
	// Get the font face that Laurent tries to hide from us.
	struct FontStruct {
		void* library;
		void* font_face; // Authentic SFML comment: implementation details
		void* unused1;
		void* unused2;
		int* unused3;
		std::string family;

		// Since maps allocate everything non-contiguously on the heap we can use void* instead of Page here.
		mutable std::map<unsigned int, void*> unused4;
		mutable std::vector<std::uint8_t> unused5;
	};

	// All your font face are belong to us too.
	void* face = reinterpret_cast<const FontStruct&>( font ).font_face;

	FontID id( face, size );

	std::map<FontID, PrimitiveTexture::Ptr >::iterator iter( m_fonts.find( id ) );

	if( iter != m_fonts.end() ) {
		return iter->second->offset;
	}

	// If the user does not specify their own character sets, make sure all the glyphs we need are loaded.
	if( m_character_sets.empty() ) {
		for( std::uint32_t codepoint = 0; codepoint < 0x0370; ++codepoint ) {
			(void)font.getGlyph( codepoint, size, false );
		}
	}

	// Make a local copy to avoid unnecessary dereferencing.
	for( const auto character_set : m_character_sets ) {
		for( auto codepoint = character_set.first; codepoint < character_set.second; ++codepoint ) {
			(void)font.getGlyph( codepoint, size, false );
		}
	}

	const auto image = font.getTexture( size ).copyToImage();

	const auto handle = LoadTexture( image );

	m_fonts[id] = handle;

	return handle->offset;
}

PrimitiveTexture::Ptr Renderer::LoadTexture( const sf::Texture& texture ) {
	return LoadTexture( texture.copyToImage() );