Module canvas

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AutoRestoredCanvas: Stack helper class calls Canvas::restore_to_count() when AutoCanvasRestore goes out of scope. Use this to guarantee that the canvas is restored to a known state.
Canvas: Canvas provides an interface for drawing, and how the drawing is clipped and transformed. Canvas contains a stack of Matrix and clip values.
Lattice: Lattice divides crate::Bitmap or crate::Image into a rectangular grid. Grid entries on even columns and even rows are fixed; these entries are always drawn at their original size if the destination is large enough. If the destination side is too small to hold the fixed entries, all fixed entries are proportionately scaled down to fit. The grid entries not on even columns and rows are scaled to fit the remaining space, if any.
OwnedCanvas: Represents a Canvas that is owned and dropped when it goes out of scope and is bound to the lifetime of some other value (an array of pixels for example).
SaveLayerFlags: SaveLayerFlags provides options that may be used in any combination in SaveLayerRec, defining how layer allocated by Canvas::save_layer() operates. It may be set to zero, [PRESERVE_LCD_TEXT], [INIT_WITH_PREVIOUS], or both flags.
SaveLayerRec: SaveLayerRec contains the state used to create the layer.
TopLayerPixels: Provides access to Canvas’s pixels.

AutoCanvasRestore
GlyphPositions: Used to pass either a slice of Point or RSXform to Canvas::draw_glyphs_at.
PointMode
SrcRectConstraint