adding lots of unit tests, improving image sampling, adding image sampling deref

src/Result.zig

@@ -478,6 +478,12 @@ pub fn getMemberCounts(self: *const Self) usize {
 }
 
 pub inline fn flushPtr(self: *Self, allocator: std.mem.Allocator) RuntimeError!void {
-    const value = self.getValue() catch return;
-    try value.flushPtr(allocator);
+    if (self.variant) |*variant| switch (variant.*) {
+        .Variable => |*v| try v.value.flushPtr(allocator),
+        .AccessChain => |*a| {
+            if (!std.mem.allEqual(u8, std.mem.asBytes(&a.value), 0xaa))
+                try a.value.flushPtr(allocator);
+        },
+        else => {},
+    };
 }