add constants for brightness in C api

crates/servicepoint_binding_c/examples/lang_c/include/servicepoint.h

@@ -8,6 +8,21 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+/**
+ * Count of possible brightness values
+ */
+#define SP_BRIGHTNESS_LEVELS 12
+
+/**
+ * see [Brightness::MAX]
+ */
+#define SP_BRIGHTNESS_MAX 11
+
+/**
+ * see [Brightness::MIN]
+ */
+#define SP_BRIGHTNESS_MIN 0
+
 /**
  * pixel count on whole screen
  */

crates/servicepoint_binding_c/src/brightness_grid.rs

@@ -4,9 +4,17 @@
 
 use crate::SPByteSlice;
 use servicepoint::{Brightness, DataRef, Grid, PrimitiveGrid};
+use std::convert::Into;
 use std::intrinsics::transmute;
 use std::ptr::NonNull;
 
+/// see [Brightness::MIN]
+pub const SP_BRIGHTNESS_MIN: u8 = 0;
+/// see [Brightness::MAX]
+pub const SP_BRIGHTNESS_MAX: u8 = 11;
+/// Count of possible brightness values
+pub const SP_BRIGHTNESS_LEVELS: u8 = 12;
+
 /// A grid containing brightness values.
 ///
 /// # Examples

crates/servicepoint_binding_cs/ServicePoint/BindGen/ServicePoint.g.cs

@@ -17,6 +17,9 @@ namespace ServicePoint.BindGen
         public const nuint SP_TILE_SIZE = 8;
         public const nuint SP_TILE_WIDTH = 56;
         public const nuint SP_TILE_HEIGHT = 20;
+        public const byte SP_BRIGHTNESS_MIN = 0;
+        public const byte SP_BRIGHTNESS_MAX = 11;
+        public const byte SP_BRIGHTNESS_LEVELS = 12;
 
 
         /// <summary>