Enum BlendMode 

pub enum BlendMode {
    Opaque,
    Average,
    Add,
    Subtract,
    AddQuarter,
}

PS1 semi-transparency mode.

The four non-opaque variants map directly to GP0(E1) / tpage bits 5..6. Opaque means the primitive command’s semi-transparent bit is kept clear, so the destination pixel is overwritten.

Variants

Opaque

Overwrite destination pixels.

Average

(background + foreground) / 2.

Add

background + foreground, clamped per channel.

Subtract

background - foreground, clamped per channel.

AddQuarter

background + foreground / 4, clamped per channel.

Implementations

impl BlendMode

pub const fn from_texture_page_bits(bits: u8) -> Self

Decode the two tpage semi-transparency bits.

Hardware tpage bits do not encode “opaque”; the primitive opcode decides whether blending is active. This therefore returns one of the four blending variants.

pub const fn from_tpage_bits(bits: u8) -> Self

👎Deprecated:

renamed to from_texture_page_bits

Renamed to from_texture_page_bits.

pub const fn texture_page_bits(self) -> u8

Encode as GP0(E1) / tpage bits 5..6.

Opaque uses the common average-blend encoding because the primitive semi-transparent bit will be clear.

pub const fn is_translucent(self) -> bool

True when a primitive using this material should set its semi-transparent command bit.

Trait Implementations

impl Clone for BlendMode

fn clone(&self) -> BlendMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BlendMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for BlendMode

fn eq(&self, other: &BlendMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for BlendMode

impl Eq for BlendMode

impl StructuralPartialEq for BlendMode