Module image_accessors 

Image pixel access with boundary handling modes.

Port of agg_image_accessors.h — provides pixel access to image buffers with different boundary handling: clip (background color), no-clip, clone (clamp to edge), and wrap (tiling).

Also includes 6 wrap mode structs for coordinate transformation.

Structs

ImageAccessorClip

Image accessor with clipping: returns a background color for out-of-bounds pixels.

ImageAccessorClone

Image accessor with clamping: out-of-bounds coordinates snap to edge pixels.

ImageAccessorNoClip

Image accessor without bounds checking — fastest, assumes all coordinates are valid.

ImageAccessorWrap

Image accessor with tiling: wraps coordinates using WrapMode policies.

WrapModeReflect

Reflect (mirror) wrapping for tiling.

WrapModeReflectAutoPow2

Auto-detecting reflect: uses bitwise for power-of-2 sizes, modulo otherwise.

WrapModeReflectPow2

Power-of-2 reflect wrapping using bitwise operations.

WrapModeRepeat

Repeat (modulo) wrapping for tiling.

WrapModeRepeatAutoPow2

Auto-detecting repeat: uses bitwise AND for power-of-2 sizes, modulo otherwise.

WrapModeRepeatPow2

Power-of-2 repeat wrapping using bitwise AND.

Traits

ImageSource

Trait for image pixel sources used by span image filters.

WrapMode

Coordinate wrapping mode for tiled image access.