Vendor dependencies for 0.3.0 release

vendor/taffy/examples/common/image.rs

@@ -0,0 +1,18 @@
+use taffy::geometry::Size;
+
+pub struct ImageContext {
+    pub width: f32,
+    pub height: f32,
+}
+
+pub fn image_measure_function(
+    known_dimensions: taffy::geometry::Size<Option<f32>>,
+    image_context: &ImageContext,
+) -> taffy::geometry::Size<f32> {
+    match (known_dimensions.width, known_dimensions.height) {
+        (Some(width), Some(height)) => Size { width, height },
+        (Some(width), None) => Size { width, height: (width / image_context.width) * image_context.height },
+        (None, Some(height)) => Size { width: (height / image_context.height) * image_context.width, height },
+        (None, None) => Size { width: image_context.width, height: image_context.height },
+    }
+}