glyphInfoGet

pub fn glyphInfoGet(self: *Entry, gpa: std.mem.Allocator, codepoint: u32) (std.mem.Allocator.Error || Error)!GlyphInfo {
            if (ascii_start <= codepoint and codepoint < ascii_size)
                return self.glyph_info_ascii[codepoint - ascii_start];

            if (self.glyph_info.get(codepoint)) |gi| return gi;

            const gi = try self.glyphInfoGenerate(codepoint);

            // new glyph, need to regen texture atlas on next render
            //std.debug.print("new glyph {}\n", .{codepoint});
            self.invalidateTextureAtlas();

            try self.glyph_info.put(gpa, codepoint, gi);
            return gi;
        }