[core] Add `line-gradient` property

Porting of https://github.com/mapbox/mapbox-gl-js/pull/6303
See the link above for the description of the feature and
its limitations).

Based on patch from @lbud (Lauren Budorick).

1 files changed, 14 insertions, 0 deletions

diff --git a/src/mbgl/shaders/line_gradient.cpp b/src/mbgl/shaders/line_gradient.cpp
new file mode 100644
index 0000000000..9409086add
--- /dev/null
+++ b/src/mbgl/shaders/line_gradient.cpp
@@ -0,0 +1,14 @@
+// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED.
+
+#include <mbgl/shaders/line_gradient.hpp>
+#include <mbgl/shaders/source.hpp>
+
+namespace mbgl {
+namespace shaders {
+
+const char* line_gradient::name = "line_gradient";
+const char* line_gradient::vertexSource = source() + 43378;
+const char* line_gradient::fragmentSource = source() + 47687;
+
+} // namespace shaders
+} // namespace mbgl