Module raster_cache 

Keys of the cached rasters of layers.

Structs

LayerRasterCacheHashes

Hashes of a layer’s content and of its render effect, which key its raster cache entries.

LayerRasterCacheIdentity

Identity of a node’s cached raster of one kind. It stays the same while the content changes.

LayerRasterCacheKey

Key of one cached layer raster. It covers the kind of entry, the owning node, the content and effect hashes, the layer bounds, the pixel size, the raster scale and the sub-pixel phase.

RasterScale

The device scale a layer raster is drawn at, compared exactly: a raster drawn at one scale places its edges and glyphs where no other scale does, so it serves only that scale.

Constants

LAYER_RASTER_CACHE_KIND_COUNT

Number of distinct LayerRasterCacheKey kinds; see LayerRasterCacheKey::kind_slot and LAYER_RASTER_CACHE_KIND_LABELS.

LAYER_RASTER_CACHE_KIND_LABELS

Short labels per kind slot, in LayerRasterCacheKey::kind_slot order.