Regenerate the coverage numbers

77.2% line and 83.1% function coverage across 2637 lines, up from 72.2% / 78.6%,
with the three new suites at 91% (audio), 95% (draw) and 58% (text). All 19
suites pass: the note recording character as an intentional failure was stale,
and neither tests/character.c nor src/character.c has changed since it was
written.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

TODO.md

@@ -379,30 +379,35 @@ ctest --test-dir build-coverage --output-on-failure
 
 Reports land in `build-coverage/coverage/` (`index.html`, `coverage.xml`).
 
-**Line coverage 72.2%, function coverage 78.6%** (1534/2125 lines), up from a
-39.6% / 44.3% baseline. `character` is the one intentionally failing suite;
-everything else passes.
+**Line coverage 77.2%, function coverage 83.1%** (2035/2637 lines), up from a
+39.6% / 44.3% baseline. All 19 suites pass. (An earlier revision of this file
+recorded `character` as an intentionally failing suite; it passes now, and
+nothing in `tests/character.c` or `src/character.c` has changed since — the fix
+came from elsewhere in the tree and this note was never updated.)
 
 | File | Lines | Functions |
 |---|---|---|
-| `src/actor.c` | 205/258 (80%) | 16/18 |
+| `src/actor.c` | 205/258 (79%) | 16/18 |
 | `src/assets.c` | 0/21 (0%) | 0/1 |
+| `src/audio.c` | 189/207 (91%) | 19/20 |
 | `src/character.c` | 104/118 (88%) | 6/7 |
-| `src/controller.c` | 220/243 (90%) | 9/9 |
-| `src/draw.c` | 0/13 (0%) | 0/1 |
-| `src/game.c` | 124/230 (54%) | 10/15 |
-| `src/heap.c` | 116/116 (100%) | 12/12 |
+| `src/controller.c` | 247/270 (91%) | 12/12 |
+| `src/draw.c` | 253/267 (95%) | 11/12 |
+| `src/error.c` | 9/9 (100%) | 1/1 |
+| `src/game.c` | 124/231 (54%) | 10/15 |
+| `src/heap.c` | 111/111 (100%) | 12/12 |
 | `src/json_helpers.c` | 111/111 (100%) | 11/11 |
 | `src/physics.c` | 140/140 (100%) | 10/10 |
-| `src/registry.c` | 76/102 (74%) | 11/12 |
+| `src/registry.c` | 76/102 (75%) | 11/12 |
 | `src/renderer.c` | 7/70 (10%) | 1/7 |
 | `src/sprite.c` | 93/101 (92%) | 5/5 |
 | `src/staticstring.c` | 16/17 (94%) | 2/2 |
-| `src/text.c` | 0/28 (0%) | 0/2 |
+| `src/text.c` | 26/45 (58%) | 3/4 |
 | `src/tilemap.c` | 201/426 (47%) | 10/20 |
 | `src/util.c` | 121/131 (92%) | 7/8 |
+| `src/version.c` | 2/2 (100%) | 1/1 |
 
-Branch coverage reads 18.6% and should not be used as a target. The akerror
+Branch coverage reads 20.8% and should not be used as a target. The akerror
 control-flow macros (`ATTEMPT`/`CATCH`/`PROCESS`/`FINISH`, `FAIL_*_RETURN`)
 expand into large branch trees per call site, most of them unreachable in normal
 operation — `src/game.c` reports over 1700 branches across 230 lines. Track line
@@ -439,14 +444,24 @@ Done:
 - `tests/actor.c` — extended with the eight control-map handlers, automatic
   facing, movement logic, the animation frame state machine, `akgl_actor_update`,
   and character/sprite binding lookups. 80%.
+- `tests/audio.c` — every waveform, the ADSR envelope stage by stage, gate
+  expiry and release, voice summing and clamping, the master level, and device
+  open/shutdown under the dummy driver. 91%.
+- `tests/draw.c` — every primitive against a 64x64 software renderer with the
+  pixels read back, including flood-fill containment, save/paste roundtrip, and
+  that drawing restores the renderer's draw color. 95%.
+- `tests/text.c` — font loading into the registry and both measurement entry
+  points against a monospaced fixture font. 58%; the rest of `src/text.c` is
+  `akgl_text_rendertextat`, which needs the harness.
 
 ## Remaining work
 
 ### Needs the offscreen renderer harness
 
-`src/renderer.c` (63 lines), `src/text.c` (28), `src/draw.c` (13),
-`src/assets.c` (21), `akgl_actor_render`/`actor_visible` in `src/actor.c` (53),
-and the drawing half of `src/tilemap.c` all need a live `renderer` global.
+`src/renderer.c` (63 lines), `akgl_text_rendertextat` in `src/text.c` (19),
+`akgl_draw_background` in `src/draw.c` (13), `src/assets.c` (21),
+`akgl_actor_render`/`actor_visible` in `src/actor.c` (53), and the drawing half
+of `src/tilemap.c` all need a live `renderer` global.
 
 Build `tests/harness.c` / `tests/harness.h` with `akgl_test_init_headless()` and
 `akgl_test_shutdown_headless()`: set the dummy video and audio drivers,
@@ -464,10 +479,15 @@ Then:
   rotated `draw_texture` path including `angle != 0` with a NULL center; the
   `draw_mesh` "not implemented" stub; and `draw_world` layer ordering. Note
   `defflags` at `src/renderer.c:113` is uninitialized until the `if` body runs.
-- **`tests/text.c`**, **`tests/draw.c`**, **`tests/assets.c`** — font loading
-  into `AKGL_REGISTRY_FONT`, text rendering with wrap on and off, background
-  drawing at zero/negative/oversized dimensions, and BGM loading into
-  `AKGL_REGISTRY_MUSIC` under the dummy audio driver.
+- **`tests/assets.c`** — BGM loading into `AKGL_REGISTRY_MUSIC` under the dummy
+  audio driver.
+- **`tests/text.c` extensions** — text rendering with wrap on and off.
+  `tests/text.c` exists and covers font loading and measurement; only
+  `akgl_text_rendertextat` is left.
+- **`tests/draw.c` extensions** — `akgl_draw_background` at zero, negative and
+  oversized dimensions. `tests/draw.c` exists and covers every other primitive
+  against a software renderer; `akgl_draw_background` is the one function in the
+  file that still reads the global `renderer` rather than taking a backend.
 - **`tests/tilemap.c` extensions** — `akgl_tilemap_draw`, `_draw_tileset`, and
   `akgl_tilemap_load_layer_image`.