Constant webrender::renderer::VERTEX_DATA_TEXTURE_COUNT

pub const VERTEX_DATA_TEXTURE_COUNT: usize = 3;

The size of the array of each type of vertex data texture that is round-robin-ed each frame during bind_frame_data. Doing this helps avoid driver stalls while updating the texture in some drivers. The size of these textures are typically very small (e.g. < 16 kB) so it’s not a huge waste of memory. Despite that, this is a short-term solution - we want to find a better way to provide this frame data, which will likely involve some combination of UBO/SSBO usage. Although this only affects some platforms, it’s enabled on all platforms to reduce testing differences between platforms.