[core] Harden Transform anchor & padding usage

Use optional values for anchor & padding in Map and Transform functions
instead of NaNs. Added unit tests to stress some edge cases.

1 files changed, 3 insertions, 3 deletions

diff --git a/platform/default/glfw_view.cpp b/platform/default/glfw_view.cpp
index 790b0a4dd7..a931928d6d 100644
--- a/platform/default/glfw_view.cpp
+++ b/platform/default/glfw_view.cpp
@@ -326,7 +326,7 @@ void GLFWView::onScroll(GLFWwindow *window, double /*xOffset*/, double yOffset)
         scale = 1.0 / scale;
     }
 
-    view->map->scaleBy(scale, { view->lastX, view->lastY });
+    view->map->scaleBy(scale, mbgl::ScreenCoordinate { view->lastX, view->lastY });
 }
 
 void GLFWView::onWindowResize(GLFWwindow *window, int width, int height) {
@@ -363,9 +363,9 @@ void GLFWView::onMouseClick(GLFWwindow *window, int button, int action, int modi
             double now = glfwGetTime();
             if (now - view->lastClick < 0.4 /* ms */) {
                 if (modifiers & GLFW_MOD_SHIFT) {
-                    view->map->scaleBy(0.5, { view->lastX, view->lastY }, mbgl::Milliseconds(500));
+                    view->map->scaleBy(0.5, mbgl::ScreenCoordinate { view->lastX, view->lastY }, mbgl::Milliseconds(500));
                 } else {
-                    view->map->scaleBy(2.0, { view->lastX, view->lastY }, mbgl::Milliseconds(500));
+                    view->map->scaleBy(2.0, mbgl::ScreenCoordinate { view->lastX, view->lastY }, mbgl::Milliseconds(500));
                 }
             }
             view->lastClick = now;