Speed up property checking

Author: nint8835

src/ffi.mjs

@@ -104,3 +104,13 @@ export function ensurePixelExists(imageData, x, y, callback) {
 
   return callback(imageData, x, y);
 }
+
+/**
+ * Returns whether a given pixel value has a given property.
+ * @param {number} pixelVal - The pixel value.
+ * @param {number} property - The property.
+ * @returns {bool} - Whether the pixel value has the property.
+ */
+export function hasProperty(pixelVal, property) {
+  return !!(pixelVal & property);
+}

src/properties.gleam

@@ -1,5 +1,3 @@
-import gleam/int
-
 // 00000000 00000001 00000000 00000000
 pub const grows = 0x00010000
 
@@ -12,6 +10,5 @@ pub const floats = 0x00000100
 // 00000000 00000000 00000000 00000001
 pub const experiences_gravity = 0x00000001
 
-pub fn has_property(pixel_val: Int, property: Int) -> Bool {
-  int.bitwise_and(pixel_val, property) != 0
-}
+@external(javascript, "./ffi.mjs", "hasProperty")
+pub fn has_property(pixel_val: Int, property: Int) -> Bool