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Merged
radicazz merged 4 commits into from
Jan 9, 2026
Merged

feature: add start + end menus #3

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59e9b05
feat: add ui panel helpers
radicazz Jan 9, 2026
48df9af
feat: add start menu and game state
radicazz Jan 9, 2026
872a3ff
feat: add game over menu with restart
radicazz Jan 9, 2026
84532a6
chore: update agent notes
radicazz Jan 9, 2026
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6 changes: 5 additions & 1 deletion AGENTS.md
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Original file line number Diff line number Diff line change
Expand Up @@ -13,8 +13,11 @@ ctest --test-dir build --output-on-failure
- `src/main.c`: main loop (fixed-timestep update + render).
- `src/snake.c`, `src/snake.h`: game state, movement, collisions, rendering.
- `src/modules/window.c`, `src/modules/window.h`: SDL window/renderer + SDL_ttf init/teardown + timing.
- `src/modules/audio.c`, `src/modules/audio.h`: audio manager + sound loading/playing.
- `src/modules/ui.c`, `src/modules/ui.h`: reusable UI widgets (buttons/panels).
- `src/utils/*`: `vector2i_*` + `dynamic_array_*`.
- `tests/dynamic_array_tests.c`: only unit test target (`dynamic_array_tests`).
- `tests/dynamic_array_tests.c`: unit test target (`dynamic_array_tests`).
- `tests/vector_tests.c`: unit test target (`vector_tests`).

## Conventions (follow these)

Expand All @@ -24,6 +27,7 @@ ctest --test-dir build --output-on-failure
- Lifetimes: `*_destroy()` must be safe after partial init; free resources once, then set pointers to `NULL`.
- Avoid unbounded loops; random placement must have an upper bound + a deterministic fallback.
- Prefer `snprintf` over `sprintf`; avoid implicit truncation.
- Commit messages: use Conventional Commit prefixes (`feat:`, `fix:`, `refactor:`, `chore:`, etc.) with a short summary.

## CMake notes

Expand Down
46 changes: 46 additions & 0 deletions src/modules/ui.c
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Expand Up @@ -56,3 +56,49 @@ bool ui_button_render(SDL_Renderer* renderer, const ui_button_t* button) {

return true;
}

void ui_panel_init(ui_panel_t* panel, SDL_Color fill_color, SDL_Color border_color) {
SDL_assert(panel != NULL);

panel->rect.x = 0.f;
panel->rect.y = 0.f;
panel->rect.w = 0.f;
panel->rect.h = 0.f;
panel->fill_color = fill_color;
panel->border_color = border_color;
}

void ui_panel_layout_from_content(ui_panel_t* panel, const vector2i_t* screen_size, const vector2i_t* content_size,
float padding_x, float padding_y) {
SDL_assert(panel != NULL);
SDL_assert(screen_size != NULL);
SDL_assert(content_size != NULL);

panel->rect.w = (float)content_size->x + padding_x * 2.f;
panel->rect.h = (float)content_size->y + padding_y * 2.f;
panel->rect.x = ((float)screen_size->x - panel->rect.w) * 0.5f;
panel->rect.y = ((float)screen_size->y - panel->rect.h) * 0.5f;
}

bool ui_panel_render(SDL_Renderer* renderer, const ui_panel_t* panel) {
SDL_assert(renderer != NULL);
SDL_assert(panel != NULL);

SDL_SetRenderDrawColor(renderer, panel->fill_color.r, panel->fill_color.g, panel->fill_color.b,
panel->fill_color.a);
if (SDL_RenderFillRect(renderer, &panel->rect) == false) {
return false;
}

if (panel->border_color.a == 0) {
return true;
}

SDL_SetRenderDrawColor(renderer, panel->border_color.r, panel->border_color.g, panel->border_color.b,
panel->border_color.a);
if (SDL_RenderRect(renderer, &panel->rect) == false) {
return false;
}

return true;
}
36 changes: 36 additions & 0 deletions src/modules/ui.h
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,12 @@ typedef struct {
SDL_Color border_color;
} ui_button_t;

typedef struct {
SDL_FRect rect;
SDL_Color fill_color;
SDL_Color border_color;
} ui_panel_t;

/**
* @brief Initialize a button with colors and zeroed geometry.
*
Expand Down Expand Up @@ -63,4 +69,34 @@ bool ui_button_contains(const ui_button_t* button, float x, float y);
*/
bool ui_button_render(SDL_Renderer* renderer, const ui_button_t* button);

/**
* @brief Initialize a panel with colors and zeroed geometry.
*
* @param panel Panel to initialize.
* @param fill_color Fill color for the panel body.
* @param border_color Border color for the panel outline.
*/
void ui_panel_init(ui_panel_t* panel, SDL_Color fill_color, SDL_Color border_color);

/**
* @brief Size and center a panel based on content size and padding.
*
* @param panel Panel to size and position.
* @param screen_size Screen size in pixels.
* @param content_size Content size in pixels.
* @param padding_x Horizontal padding around the content.
* @param padding_y Vertical padding around the content.
*/
void ui_panel_layout_from_content(ui_panel_t* panel, const vector2i_t* screen_size, const vector2i_t* content_size,
float padding_x, float padding_y);

/**
* @brief Render the panel body and optional border.
*
* @param renderer SDL renderer to draw with.
* @param panel Panel to draw.
* @return true if rendering succeeded, false otherwise.
*/
bool ui_panel_render(SDL_Renderer* renderer, const ui_panel_t* panel);

#endif // UI_H
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