Custom drawable layer v3 (#3210)

src/mbgl/mtl/uniform_buffer.cpp

@@ -39,7 +39,7 @@ void UniformBuffer::update(const void* data, std::size_t dataSize) {
     buffer.update(data, dataSize, /*offset=*/0);
 }
 
-void UniformBufferArray::bind(RenderPass& renderPass) const noexcept {
+void UniformBufferArray::bindMtl(RenderPass& renderPass) const noexcept {
     for (size_t id = 0; id < allocatedSize(); id++) {
         const auto& uniformBuffer = get(id);
         if (!uniformBuffer) continue;
@@ -54,5 +54,9 @@ void UniformBufferArray::bind(RenderPass& renderPass) const noexcept {
     }
 }
 
+void UniformBufferArray::bind(gfx::RenderPass& renderPass) {
+    bindMtl(static_cast<RenderPass&>(renderPass));
+}
+
 } // namespace mtl
 } // namespace mbgl