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Portable C program that renders a classic Weather Channel "Local on the 8s" screen using ANSI 24-bit color escape codes. Includes a 5x7 bitmap font, framebuffer-based drawing, and PNG screenshot output via libpng. No GUI, no heavy runtimes — just gcc, libpng, and a terminal. https://claude.ai/code/session_012KpuXnB1cGuo1YehDfp5AH
Split the monolithic weatherstar.c into focused modules: - fb.h: framebuffer types, palette, drawing primitives - font.h: 5x7 bitmap font data and text rendering - icons.h: weather icon drawing (sun, cloud) - display.h: WeatherStar 4000 screen layout composition - screenshot.h: PNG output (libpng) and ANSI terminal output - main.c: entry point and CLI parsing Still compiles as a single translation unit (gcc main.c) — no multi-object build complexity. Remove redundant weatherstar.sh wrapper; Makefile is sufficient. Bug fixes and improvements: - Fix memory leak: row buffer leaked on libpng longjmp error path (allocate before setjmp so it can be freed in the error handler) - Fix rounded-rect corner clearing: use integer distance² comparison instead of sqrtf — faster and avoids float-to-int edge cases - Centralise background gradient into fb_bg_at() helper to eliminate duplicated interpolation code across 4 corner branches - Buffer ANSI output per-line instead of per-pixel printf (10x fewer syscalls, ~3.6 MB output now written in 200 fwrite calls vs 128k) - Add null checks for png_create_write_struct / png_create_info_struct https://claude.ai/code/session_012KpuXnB1cGuo1YehDfp5AH
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Design doc for a family dashboard on Pi Zero W: rotating slides rendered with Pillow, blitted directly to /dev/fb0 via mmap. Weather is the first slide, co-located with Pi-hole. https://claude.ai/code/session_012KpuXnB1cGuo1YehDfp5AH
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Portable C program that renders a classic Weather Channel "Local on the
8s" screen using ANSI 24-bit color escape codes. Includes a 5x7 bitmap
font, framebuffer-based drawing, and PNG screenshot output via libpng.
No GUI, no heavy runtimes — just gcc, libpng, and a terminal.
https://claude.ai/code/session_012KpuXnB1cGuo1YehDfp5AH