Update face aligment example

Author: Adrià Arrufat

examples/build.zig.zon

@@ -4,8 +4,8 @@
 
     .dependencies = .{
         .zignal = .{
-            .url = "https://github.com/bfactory-ai/zignal/archive/0776105d88325fbeb42f11e6a99371ace421e20b.tar.gz",
-            .hash = "12204c77931cfeaa780324506f738baf97c2a95f8c4fccf30a3e1fa8fdbe0f87bb27",
+            .url = "https://github.com/bfactory-ai/zignal/archive/c784809c4c0eb914694998b5434c25d9efd379b9.tar.gz",
+            .hash = "1220a6447aee50bedc4ecea70a562ef2833267011878db344661627485cdce756b80",
         },
     },
 

examples/src/face_alignment.zig

@@ -59,13 +59,15 @@ pub fn extractAlignedFace(
     const angle = std.math.atan2(p.y, p.x);
     const scale = @sqrt(p.x * p.x + p.y * p.y);
     const center = transform.project(.{ .x = side / 2, .y = side / 2 });
-    var rotated = try image.rotateFrom(allocator, center.x, center.y, angle);
+    var rotated: Image(Rgba) = undefined;
+    try image.rotateFrom(allocator, center, angle, &rotated);
     defer rotated.deinit(allocator);
 
     const rect = Rectangle.initCenter(center.x, center.y, side * scale, side * scale);
-    var crop = try rotated.crop(allocator, rect);
-    defer crop.deinit(allocator);
-    crop.resize(out);
+    var chip: Image(Rgba) = undefined;
+    try rotated.crop(allocator, rect, &chip);
+    defer chip.deinit(allocator);
+    chip.resize(out);
 }
 
 pub export fn extract_aligned_face(

src/image.zig

@@ -2,8 +2,6 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const Rgba = @import("color.zig").Rgba;
 const as = @import("meta.zig").as;
-const isScalar = @import("meta.zig").isScalar;
-const isStruct = @import("meta.zig").isStruct;
 const Rectangle = @import("geometry.zig").Rectangle(f32);
 const Point2d = @import("point.zig").Point2d(f32);