Struct TextureSpec 

pub struct TextureSpec {
    pub width: u32,
    pub height: u32,
    pub format: TextureFormat,
    pub data: Vec<u8>,
    pub generate_mips: bool,
}

Fields

width: u32

height: u32

format: TextureFormat

data: Vec<u8>

Base (mip 0) pixel data, tightly packed, 4 bytes per texel (matching format). Required even when format isn’t literally Rgba8* — mip generation always treats it as 4 bytes/texel.

generate_mips: bool

Implementations

impl TextureSpec

pub fn mip_level_count(&self) -> u32

Number of mip levels this texture will have: the full chain down to 1x1 if generate_mips, otherwise just the base level.

pub fn wgpu_descriptor(&self) -> TextureDescriptor<'static>

Pure conversion — you call device.create_texture(&spec.wgpu_descriptor()) yourself, then write each mip level (see downsample for generating each one from the last).

pub fn downsample(data: &[u8], width: u32, height: u32) -> (Vec<u8>, u32, u32)

Box-filter downsample to half size (minimum 1x1), 4 bytes/texel. Pure data transform — no wgpu involved. Call this once per mip level between your own queue.write_texture calls to build the chain yourself; see mip_level_count for how many levels to write in total.

impl TextureSpec

pub fn new(width: u32, height: u32, data: Vec<u8>, generate_mips: bool) -> Self

pub fn with_format(self, format: TextureFormat) -> Self