Files
libakgl/include/akgl
Andrew Kesterson 42b53dcb20 Check the renderer backend before drawing text
akgl_text_rendertextat() called renderer->draw_texture() with no check on
the global renderer, its sdl_renderer or the function pointer itself, so a
backend that has an SDL_Renderer but was never bound segfaults on the first
line of text -- the state akgl_render_bind2d() exists to get a host out of.
All three are now checked, with AKERR_NULLPOINTER as the draw entry points
report, and checked before anything is rasterized rather than after.

tests/text.c grows a software renderer with a bound backend and covers all
three refusals plus the successful draw, wrapped and unwrapped: src/text.c
goes from 58% to 100% line coverage. A made-up SDL_Renderer pointer is not
enough to test this -- SDL refuses the bogus handle on its own and the call
fails for the wrong reason, which a deleted check survives.

Also documents what the tests found: SDL_ttf refuses the empty string, so
drawing an empty line is an error while measuring one is not. Filed in
TODO.md rather than pinned in the suite.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-07-31 12:52:20 -04:00
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