light meter: initial UI work

watch-faces/sensor/light_meter_face.h

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+/*
+ * MIT License
+ *
+ * Copyright (c) 2024 Joey Castillo
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include "movement.h"
+
+#ifdef HAS_IR_SENSOR
+
+/*
+ * LIGHT METER
+ *
+ * EXTREME WORK IN PROGRESS on a photographic light meter.
+ * Currently does not display working exposure readings! This commit is just a
+ * user interface for the light meter, with fake readings until I calibrate it.
+ *
+ */
+
+typedef enum {
+    LIGHT_METER_APERTURE_F1 = 0,
+    LIGHT_METER_APERTURE_F1_4,
+    LIGHT_METER_APERTURE_F2,
+    LIGHT_METER_APERTURE_F2_8,
+    LIGHT_METER_APERTURE_F4,
+    LIGHT_METER_APERTURE_F5_6,
+    LIGHT_METER_APERTURE_F8,
+    LIGHT_METER_APERTURE_F11,
+    LIGHT_METER_APERTURE_F16,
+    LIGHT_METER_APERTURE_F22,
+    LIGHT_METER_APERTURE_F32,
+    LIGHT_METER_APERTURE_COUNT
+} light_meter_aperture_t;
+
+typedef enum {
+    LIGHT_METER_SHUTTER_1_4 = 0,
+    LIGHT_METER_SHUTTER_1_8,
+    LIGHT_METER_SHUTTER_1_15,
+    LIGHT_METER_SHUTTER_1_30,
+    LIGHT_METER_SHUTTER_1_60,
+    LIGHT_METER_SHUTTER_1_125,
+    LIGHT_METER_SHUTTER_1_250,
+    LIGHT_METER_SHUTTER_1_500,
+    LIGHT_METER_SHUTTER_1_1000,
+    LIGHT_METER_SHUTTER_1_2000,
+    LIGHT_METER_SHUTTER_1_4000,
+    LIGHT_METER_SHUTTER_COUNT
+} light_meter_shutter_speed_t;
+
+typedef enum {
+    LIGHT_METER_ISO_25 = 0,
+    LIGHT_METER_ISO_50,
+    LIGHT_METER_ISO_100,
+    LIGHT_METER_ISO_200,
+    LIGHT_METER_ISO_400,
+    LIGHT_METER_ISO_800,
+    LIGHT_METER_ISO_1600,
+    LIGHT_METER_ISO_3200,
+    LIGHT_METER_ISO_COUNT
+} light_meter_iso_t;
+
+typedef enum {
+    LIGHT_METER_MODE_APERTURE_PRIORITY = 0,
+    LIGHT_METER_MODE_SHUTTER_PRIORITY,
+    LIGHT_METER_MODE_AP_IS_SETTING_ISO,
+    LIGHT_METER_MODE_SP_IS_SETTING_ISO
+} light_meter_mode_t;
+
+typedef struct {
+    light_meter_mode_t mode;
+    light_meter_iso_t iso;
+    light_meter_aperture_t aperture_priority;
+    light_meter_shutter_speed_t shutter_priority;
+} light_meter_state_t;
+
+void light_meter_face_setup(uint8_t watch_face_index, void ** context_ptr);
+void light_meter_face_activate(void *context);
+bool light_meter_face_loop(movement_event_t event, void *context);
+void light_meter_face_resign(void *context);
+
+#define light_meter_face ((const watch_face_t){ \
+    light_meter_face_setup, \
+    light_meter_face_activate, \
+    light_meter_face_loop, \
+    light_meter_face_resign, \
+    NULL, \
+})
+
+#endif // HAS_IR_SENSOR