nx_x11_pixmap.nx

nx_x11_pixmap.nx -- bits-up X11 off-screen pixmap drawable. Part of the "Nishi troubleshoots Nishi" self-closing-loop arc. Off-screen pixmaps let us render the SAME drawing code-path to a drawable we can read back via GetImage, then drop to a file the developer (human OR Claude) can open without needing a live X11 session. Replaces "ask the user did you see X?" with "diff /tmp/nishi_render.ppm against the expected golden." X11 Protocol §6 Pixmap. CreatePixmap (opcode 53): byte 0: opcode = 53 byte 1: depth bytes 2-3: request_length (4-byte units) = 4 bytes 4-7: pixmap id (allocated via nx_x11_alloc_id) bytes 8-11: drawable (typically the window -- gives screen context) bytes 12-13: width bytes 14-15: height FreePixmap (opcode 54): byte 0: 54 byte 1: unused bytes 2-3: request_length = 2 bytes 4-7: pixmap id license_tier: ORIGINAL genealogy_id: international-research-sources/x_org/xproto_v11_r0 lineage_id: nishi_x11_pixmap_q10