With a mouse, the menus' pointer (platform_ui_pointer_set_active) was the
system's cursor. The game window now has a cursor of its own:
port/assets/cursor/menu_cursor.png, an 80 x 116 blue arrow with a
transparent background, embedded by tools/embed_assets.py as the window
icon is and made into an SDL colour cursor when the window is created.
At 100% display scale the cursor is the picture at a quarter of its size
(20 x 29, by two halvings); the picture itself is the alternate image SDL
scales from at larger display scales (SDL_HINT_MOUSE_DPI_SCALE_CURSORS,
which SDL implements on Windows). The hot spot is the arrow's tip, the
picture's top-left corner.
Desktop builds only: the code sits beside the window icon's, so Android
and the web keep theirs. The cursor shows wherever SDL shows one over the
window, which is the menus' pointer, the scoreboard's and a mouse freed
with F12; in play the mouse stays captured and hidden as before.
Checked on Windows: the build, and one start to the main menu with a
hidden window. A check line (not in this commit) logged the cursor made
and active, 20 x 29 with the 80 x 116 alternate, and saved SDL's 20 x 29
image, which looks as intended. Not built here for Linux, where SDL uses
the 20 x 29 image at every display scale.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
