Method cachedMesh

src/IECoreScene/Font.cpp:483–522

		mutable std::vector<MeshPtr> m_meshes;

		const Mesh *cachedMesh( char c ) const
		{
			if( c < 0 )
			{
				// Map all invalid characters to capital X
				c = 'X';
			}
			FreeTypeMutex::scoped_lock lock( g_freeTypeMutex );

			// see if we have it cached
			if( m_meshes[c] )
			{
				return m_meshes[c].get();
			}

			// not in cache, so load it
			FT_Load_Char( m_face, c, FT_LOAD_NO_BITMAP | FT_LOAD_NO_SCALE );

			// get the mesh
			Mesher m( (FT_Pos)(m_curveTolerance * m_face->units_per_EM) );
			MeshPrimitivePtr primitive = m.mesh( &(m_face->glyph->outline) );

			// transform it so an EM is 1 unit
			M44f transform; transform.scale( V3f( 1.0f / m_face->units_per_EM ) );
			TransformOpPtr transformOp = new TransformOp;
			transformOp->inputParameter()->setValue( primitive );
			transformOp->matrixParameter()->setValue( new M44fData( transform ) );
			transformOp->copyParameter()->setTypedValue( false );
			transformOp->operate();

			// put it in the cache
			MeshPtr mesh( new Mesh );
			mesh->primitive = primitive;
			mesh->bound = primitive->bound();
			mesh->advance = V2f( m_face->glyph->advance.x, m_face->glyph->advance.y ) / m_face->units_per_EM;
			m_meshes[c] = mesh;

			// return it
			return mesh.get();
		}

		typedef tbb::spin_mutex FreeTypeMutex;
		static FreeTypeMutex g_freeTypeMutex;