Struct MaskLayer 

#[repr(C, packed(1))]
pub struct MaskLayer {
    pub transform: [f32; 6],
    pub min: [f32; 2],
    pub max: [f32; 2],
    pub mask_tex_idx: u32,
    pub prev_mask_idx: i32,
    pub kind: u32,
    pub paint_style: u32,
    pub stroke_half_width: f32,
    pub aa_epsilon: f32,
    pub p0: [f32; 4],
}

The mask layer describes an alpha channel layer that is used in the fragment shader to sample the alpha channel and apply it to the color.

Fields

transform: [f32; 6]

A 2x3 column-major matrix, transform a vertex position to its mask texture position for atlas, or local position for sdf.

min: [f32; 2]

The min bound for atlas texture space, or local rect min for sdf.

max: [f32; 2]

The max bound for atlas texture space, or local rect max for sdf.

mask_tex_idx: u32

The index of the texture(alpha) that contained this layer, load_textures method provide all textures a draw phase need.

prev_mask_idx: i32

The index of the previous mask layer needs to continue to be applied. The negative value means there isn’t any more mask layer that needs to be applied.

kind: u32

0 for atlas, 1 for sdf-rect.

paint_style: u32

0 for fill, 1 for stroke.

stroke_half_width: f32

half stroke width in local space when paint_style is stroke.

aa_epsilon: f32

anti-aliasing epsilon.

p0: [f32; 4]

generic sdf parameters. for circle: [cx, cy, r, 0], for round-rect: corner radii.

Trait Implementations

impl AsBytes for MaskLayer

where [f32; 6]: AsBytes, [f32; 2]: AsBytes, u32: AsBytes, i32: AsBytes, f32: AsBytes, [f32; 4]: AsBytes,

fn as_bytes(&self) -> &[u8]

Gets the bytes of this value.

fn write_to(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to bytes.

fn write_to_prefix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the prefix of bytes.

fn write_to_suffix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the suffix of bytes.

impl Clone for MaskLayer

fn clone(&self) -> MaskLayer

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.