Struct ImageScratch 

pub struct ImageScratch {
    pub visible_tiles: Range<VisibleImageTile>,
    pub src_color: Option<RenderTaskId>,
    pub normalized_uvs: bool,
    pub adjustment: AdjustedImageSource,
    pub tight_local_clip_rect: LayoutRect,
    pub may_need_repetition: bool,
    pub gpu_address: GpuBufferAddress,
}

Per-frame scratch data for an Image primitive. Captures the per-frame outputs of ImageData::update: the source render task (or a Range of per-tile tasks for tiled images), normalized-uvs flag, image adjustment from snapshots, and a tight local clip rect derived from the prim’s clip chain. Pushed during prepare and read by batch.

Fields

visible_tiles: Range<VisibleImageTile>

Range into PrimitiveFrameScratch.visible_image_tiles for tiled images. Empty for non-tiled images.

src_color: Option<RenderTaskId>

Source render task for non-tiled images.

normalized_uvs: bool

Whether to render with normalized UVs (set for some external images).

adjustment: AdjustedImageSource

Adjustment applied when sampling from a wider source (e.g. snapshot images).

tight_local_clip_rect: LayoutRect

Tight local clip rect derived from the prim’s clip chain. We rely on having this in cases where decomposing repeated images can produce primitives that partially cover the original image rect, and for snapshot images where the snapshot area is tighter than the rasterized area.

may_need_repetition: bool

Whether this draw needs the repetition-capable image shader. Set to false when the stretch_size covers the prim (no tiling) or when the image was decomposed into per-tile prims at scene-build time. Read by batch to choose between brush_image and brush_fast_image.

gpu_address: GpuBufferAddress

Address of the per-instance image-brush GPU block. Lives here (rather than on the template’s PrimTemplateCommonData) because the resolved stretch size and adjustment-mapped values vary per instance, even when many instances share a single template.

Implementations

impl ImageScratch

pub fn empty() -> Self

Trait Implementations

impl Debug for ImageScratch

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

Formats the value using the given formatter.

impl Serialize for ImageScratch

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.