[iOS][macOS] Add ImageSource bindings

2 files changed, 11 insertions, 8 deletions

diff --git a/src/mbgl/renderer/buckets/raster_bucket.cpp b/src/mbgl/renderer/buckets/raster_bucket.cpp
index 8c9c1658a1..49ec0065c3 100644
--- a/src/mbgl/renderer/buckets/raster_bucket.cpp
+++ b/src/mbgl/renderer/buckets/raster_bucket.cpp
@@ -13,7 +13,9 @@ RasterBucket::RasterBucket(UnassociatedImage&& image_) : image(std::move(image_)
 }
 
 void RasterBucket::upload(gl::Context& context) {
-    texture = context.createTexture(image);
+    if (!texture) {
+        texture = context.createTexture(image);
+    }
     if (!vertices.empty()) {
         vertexBuffer = context.createVertexBuffer(std::move(vertices));
         indexBuffer = context.createIndexBuffer(std::move(indices));
@@ -27,7 +29,7 @@ void RasterBucket::clear() {
     segments.clear();
     vertices.clear();
     indices.clear();
-    
+
     uploaded = false;
 }
 void RasterBucket::render(Painter& painter,
diff --git a/src/mbgl/renderer/sources/render_image_source.cpp b/src/mbgl/renderer/sources/render_image_source.cpp
index 7fb7caa580..f5068b9d7f 100644
--- a/src/mbgl/renderer/sources/render_image_source.cpp
+++ b/src/mbgl/renderer/sources/render_image_source.cpp
@@ -135,12 +135,13 @@ void RenderImageSource::update(Immutable<style::Source::Impl> baseImpl_,
         geomCoords.push_back(gc);
     }
     
-    if (!bucket) {
-        UnassociatedImage img = impl().getImage().clone();
-        if (!img.valid()) {
-            return;
-        }
-        bucket = std::make_unique<RasterBucket>(std::move(img));
+    const UnassociatedImage& image = impl().getImage();
+    if (!image.valid()) {
+        return;
+    }
+    
+    if (!bucket || image != bucket->image) {
+        bucket = std::make_unique<RasterBucket>(image.clone());
     } else {
         bucket->clear();
     }