146 lines
6.1 KiB
C
146 lines
6.1 KiB
C
/* backlight.c — MeowOS launcher 拆分模块（LAUNCHER_SPLIT_PLAN 拆分）。*/
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/* 本文件由拆分工具从 meow_launcherd.c 按职责搬移；逻辑与原文 0-diff（仅 static 可见性按跨模块需求调整）。*/
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#include "meow_launcher_internal.h"
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/* ---- MeowOS 面板自持（M2.6：播放器已死，MeowOS 拥有面板/背光，无拔河）----
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* 电源键按时长三分：单击（短按松开）= 息屏/亮屏；3s=电源菜单；8s=强制关机。
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* 息屏 = 亮度0 + FBIOBLANK(4)（面板下电，同时挂起 goodix 触摸，无误触）；
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* 亮屏 = FBIOBLANK(0) + 恢复亮度。 */
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int meow_screen_on = 1;
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int meow_saved_brightness = 60;
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int meow_auto_slept = 0; /* M2.17：当前是否「超时自动息屏」置位（手动电源息屏不置位） */
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/* brightness save/restore (defined below, used by run_menu) */
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int saved_brightness = -1;
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/* M2.86：亮度「待补应用」挂起标志。launcher 被 sysui 在 S70 早拉起，早于 /usr/data(UBIFS) 就绪，
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* settings_load 读到的是纯默认值（display.brightness=101→clamp 100）；此时 apply_user_brightness
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* 若照写 100 即「开机遇 100 满亮」。修：设置未真正读到盘上时挂起，待 run_menu 轮询 settings_load
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* 成功（meow_settings_loaded()==1）后补应用真实用户亮度。 */
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int meow_brightness_pending = 0;
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/* M2.53：MeowOS 主屏接管时把亮度强制压回用户设置值（display.brightness，经
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* meow_settings_brightness_clamped() —— 下限 brightness_min 默认 1、上限 100），
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* 覆盖 HibyOS 播放器写入 sysfs 的背光下限（16/25）。仅应在「MeowOS 真正接管画面」
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* （播放器已死、主屏常驻，即 run_menu 的 had_player==0）时调用；播放器会话期间的
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* 覆盖菜单（had_player==1）不去抢亮度——尊重播放器背光（§红线）。
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* M2.86：设置未读到（meow_settings_loaded()==0，S70 早启动 /usr/data 未就绪）时不盲目写 100 ——
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* 挂起 meow_brightness_pending，待设置就绪后由 settings_load()（run_menu 每 2s 重试）补应用。 */
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void apply_user_brightness(void)
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{
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if (!meow_settings_loaded()) {
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if (!meow_brightness_pending)
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logmsg("apply user brightness: settings unloaded, defer (not forcing 100)");
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meow_brightness_pending = 1;
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return;
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}
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int v = meow_settings_brightness_clamped();
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if (v <= 0) v = 60; /* 防御：clamp 后不可能 ≤0，仅兜底 */
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write_brightness(v);
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g_sys.brightness = v;
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meow_brightness_pending = 0;
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logmsg("apply user brightness (MeowOS takeover) -> %d", v);
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}
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/* ---- backlight save/restore ---- */
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int read_brightness(void)
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{
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int fd = open(BACKLIGHT, O_RDONLY);
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if (fd < 0) return -1;
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char buf[16];
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int n = read(fd, buf, sizeof buf - 1);
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close(fd);
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if (n <= 0) return -1;
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buf[n] = 0;
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return atoi(buf);
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}
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static void write_file(const char *path, const char *val)
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{
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int fd = open(path, O_WRONLY);
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if (fd < 0) return;
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int l = strlen(val);
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if (write(fd, val, l) < 0)
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logmsg("write %s <- %s: %s", path, val, strerror(errno));
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close(fd);
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}
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void write_brightness(int val)
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{
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char buf[8];
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int l = snprintf(buf, sizeof buf, "%d\n", val);
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int fd = open(BACKLIGHT, O_WRONLY);
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if (fd < 0) { logmsg("backlight open fail: %s", strerror(errno)); return; }
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if (write(fd, buf, l) < 0) logmsg("backlight write %d: %s", val, strerror(errno));
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close(fd);
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}
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/* Bring the panel up for the menu, but ONLY when it is actually dark:
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* brightness 0 (the player's own screen-off/standby writes brightness 0
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* then FBIOBLANK(4); on this device bl_power stays 0, so brightness==0 is
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* the reliable indicator — keep the bl_power check as a belt-and-suspenders
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* for other states). A normal brightness is left completely untouched so
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* the menu never yanks the brightness up (Bug A).
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*
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* CRITICAL (2026-08-28 hotfix): we NEVER touch FBIOBLANK here — the panel
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* blank state belongs to the player's display state machine. fb_open()
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* already unblanks for the menu (the menu must be visible); forcibly
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* unblanking while the player thinks the screen is blanked leaves the
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* player's state machine inconsistent (it stops drawing, UI freezes —
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* this is the Bug B keeper deadlock, do not reintroduce). */
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void ensure_backlight(void)
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{
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int cur = read_brightness();
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int blp = read_file_int(BACKLIGHT_POWER);
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if (cur > 0 && blp <= 0) {
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logmsg("backlight: screen on (%d), leave untouched", cur);
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return;
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}
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int target = (saved_brightness > 0) ? saved_brightness : 60;
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logmsg("backlight off (cur=%d bl_power=%d) -> %d", cur, blp, target);
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if (cur <= 0) write_brightness(target);
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if (blp > 0) write_file(BACKLIGHT_POWER, "0\n");
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}
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/* Restore the backlight after the player resumes (app exit / SIGTERM).
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* Minimal duty after the 2026-08-28 hotfix:
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* - if the menu opened while the player had blanked the panel (screen
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* timeout), re-blank it (brightness 0 + FBIOBLANK(4)) so the physical
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* panel matches the player's display state machine — no frozen frame,
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* and the player still owns the blank state;
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* - otherwise only write brightness back when it reads 0, and never
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* unblank (unblanking behind the player's back wedges its display state
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* machine — see ensure_backlight). A normal brightness is left
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* completely untouched (Bug A: no forced brightness raise). */
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void restore_backlight(void)
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{
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if (menu_opened_blank) {
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logmsg("restore: panel was blanked at menu open, re-blank (0 + FBIOBLANK 4)");
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write_brightness(0);
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int fbfd = open(FB_DEV, O_RDWR);
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if (fbfd >= 0) { ioctl(fbfd, FBIOBLANK, 4); close(fbfd); }
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menu_opened_blank = 0;
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return;
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}
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int cur = read_brightness();
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int blp = read_file_int(BACKLIGHT_POWER);
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if (cur <= 0 || blp > 0) {
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int target = (saved_brightness > 0) ? saved_brightness : 60;
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logmsg("restore backlight (cur=%d bl_power=%d) -> %d (saved=%d)",
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cur, blp, target, saved_brightness);
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if (cur <= 0) write_brightness(target);
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if (blp > 0) write_file(BACKLIGHT_POWER, "0\n");
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}
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}
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