1 files changed, 19 insertions, 0 deletions
diff --git a/gfx/wr/examples/common/image_helper.rs b/gfx/wr/examples/common/image_helper.rs
new file mode 100644
index 0000000000..368674c0e1
--- /dev/null
+++ b/gfx/wr/examples/common/image_helper.rs
@@ -0,0 +1,19 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use webrender::api::{ImageData, ImageDescriptor, ImageFormat, ImageDescriptorFlags};
+
+pub fn make_checkerboard(width: u32, height: u32) -> (ImageDescriptor, ImageData) {
+    let mut image_data = Vec::new();
+    for y in 0 .. height {
+        for x in 0 .. width {
+            let lum = 255 * (((x & 8) == 0) ^ ((y & 8) == 0)) as u8;
+            image_data.extend_from_slice(&[lum, lum, lum, 0xff]);
+        }
+    }
+    (
+        ImageDescriptor::new(width as i32, height as i32, ImageFormat::BGRA8, ImageDescriptorFlags::IS_OPAQUE),
+        ImageData::new(image_data)
+    )
+}