use CoreImage for decoding/encoding images on osx/ios

1 files changed, 13 insertions, 1 deletions

diff --git a/test/headless.cpp b/test/headless.cpp
index e1bdbdc061..3837beb9a0 100644
--- a/test/headless.cpp
+++ b/test/headless.cpp
@@ -92,13 +92,25 @@ TEST_P(HeadlessTest, render) {
         map.setLonLatZoom(longitude, latitude, zoom);
         map.setBearing(bearing);
 
+
         // Run the loop. It will terminate when we don't have any further listeners.
         map.run();
 
         const unsigned int w = width * pixelRatio;
         const unsigned int h = height * pixelRatio;
 
-        const std::string image = util::compress_png(w, h, view.readPixels().get(), true);
+        auto pixels = view.readPixels();
+
+        const int stride = w * 4;
+        auto tmp = std::unique_ptr<char[]>(new char[stride]());
+        char *rgba = reinterpret_cast<char *>(pixels.get());
+        for (int i = 0, j = height - 2; i < j; i++, j--) {
+            memcpy(tmp.get(), rgba + i * stride, stride);
+            memcpy(rgba + i * stride, rgba + j * stride, stride);
+            memcpy(rgba + j * stride, tmp.get(), stride);
+        }
+
+        const std::string image = util::compress_png(w, h, pixels.get());
         util::write_file(actual_image, image);
     }
 }