nx_cdmap_raster_lib.nx

nx_cdmap_raster_lib.nx -- THE SOVEREIGN RASTERISER FOR THE POSITION MAP (datavis DV6 export, 2026-09-15). A compare page's position map is an inline SVG the emitter writes from nx_swcompare_lib (cdmap_pass). This library turns that SVG subset into ink: it reads the page's :root colour tokens, walks the figure's elements in document order (rect, circle, line, polyline with the momentum arrow marker, polygon, text incl. the -90 rotated axis title and the note groups), paints them into an i64 framebuffer (r + g*256 + b*65536, the packing nx_png writes) at an integer scale, draws every glyph as coverage through the estate's own TrueType engine (nx_ttf_fontlib, the same engine the pixel referee nx_cdmap_pixjudge already trusts), and writes the PNG through nx_png. It also writes the STANDALONE SVG twin: the figure's bytes with the svg namespace declared and every var(--nx-color-*) resolved to the rgb the page defined, so the file renders identically outside the page's stylesheet. WHY A SUBSET AND NOT A GENERAL SVG ENGINE: the emitter is the ONLY producer of these bytes, so the set of constructs is closed and known (cdp_* in nx_swcompare_lib), and every construct outside it is COUNTED and NAMED in the stats, never silently dropped: a render that cannot say what it skipped is a picture of the renderer's blind spots. SCOPE STATED: the face is Liberation Sans (SIL-OFL data, licence beside the bytes) where the page asks for system-ui, letter-spacing and rounded rect corners are not drawn, and a text rotated by anything but -90 degrees is skipped by name. The pixel referee (DV2) and this rasteriser share the font engine, so a label the referee measures as ink is the same ink this file paints. license_tier: ORIGINAL