Struct TextureWindow 

pub struct TextureWindow { /* private fields */ }

GP0(E2) texture-window state.

Mask and offset values are stored in the hardware’s 8-texel units. TextureWindow::NONE is a no-op window. Non-zero masks let a primitive repeat a sub-rectangle of the active tpage without physically duplicating texels in VRAM.

Implementations

impl TextureWindow

pub const NONE: Self

No texture window.

pub const fn new(mask_x: u8, mask_y: u8, offset_x: u8, offset_y: u8) -> Self

Build from raw GP0(E2) fields. Each value must fit in 5 bits.

pub const fn power_of_two_tile( origin_x: u8, origin_y: u8, size_x: u8, size_y: u8, ) -> Self

Build a window for a power-of-two tile.

origin_* and size_* are in texels. Each origin must align to its tile size because GP0(E2) replaces the coordinate bits selected by the mask. The complete tile must fit in the active 256x256 texture page.

pub const fn word(self) -> u32

Encoded GP0(E2) word.

pub const fn origin_texels(self) -> [u8; 2]

Texture-page origin selected by this window, in texels.

Power-of-two atlas placements use the raw offset fields as their aligned page-local origin. Exposing it lets a cooker-proven surface address the same texels directly and omit GP0(E2) from its packets.

Trait Implementations

impl Clone for TextureWindow

fn clone(&self) -> TextureWindow

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TextureWindow

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

Formats the value using the given formatter.

impl PartialEq for TextureWindow

fn eq(&self, other: &TextureWindow) -> 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 TextureWindow

impl Eq for TextureWindow

impl StructuralPartialEq for TextureWindow