Module rendering_buffer 

Rendering buffer — row-oriented access to pixel data.

Port of agg_rendering_buffer.h — provides two strategies for accessing rows in a rectangular pixel buffer:

• RowAccessor: computes row pointers on demand (multiplication per access). Cheap to create; good default.
• RowPtrCache: pre-computes and caches row pointers in a Vec. Faster per-row access; requires allocation.

Both support positive strides (top-down) and negative strides (bottom-up, e.g. BMP format). The RenderingBuffer type alias defaults to RowAccessor.

Structs

RowAccessor

Row accessor that computes row pointers via base + y * stride.

RowData

Row data returned by row() — a slice range and pointer into a row.

RowPtrCache

Row pointer cache that pre-computes pointers for O(1) row access.

Traits

RenderingBufferAccess

Common interface for rendering buffer access (used by copy_from).

Type Aliases

RenderingBuffer

Default rendering buffer type (matches C++ typedef row_accessor<int8u> rendering_buffer).