Fix line atlas (#2908)

platform/darwin/.gitignore

@@ -1,3 +1,5 @@
 # Generated list files from code generation
 /scripts/generate-style-code.list
 /scripts/update-examples.list
+vulkan.xcworkspace
+

src/mbgl/renderer/layers/render_line_layer.cpp

@@ -558,19 +558,17 @@ void RenderLineLayer::update(gfx::ShaderRegistry& shaders,
 
             // texture
             if (const auto& atlases = tile.getAtlasTextures(); atlases && atlases->icon) {
-                if (!iconTweaker) {
-                    iconTweaker = std::make_shared<gfx::DrawableAtlasesTweaker>(
-                        atlases,
-                        std::nullopt,
-                        idLineImageTexture,
-                        /*isText*/ false,
-                        /*sdfIcons*/ true, // to force linear filter
-                        /*rotationAlignment_*/ AlignmentType::Auto,
-                        /*iconScaled*/ false,
-                        /*textSizeIsZoomConstant_*/ false);
-                }
+                auto iconTweaker = std::make_shared<gfx::DrawableAtlasesTweaker>(
+                    atlases,
+                    std::nullopt,
+                    idLineImageTexture,
+                    /*isText*/ false,
+                    /*sdfIcons*/ true, // to force linear filter
+                    /*rotationAlignment_*/ AlignmentType::Auto,
+                    /*iconScaled*/ false,
+                    /*textSizeIsZoomConstant_*/ false);
 
-                builder->addTweaker(iconTweaker);
+                builder->addTweaker(std::move(iconTweaker));
 
                 setSegments(builder, bucket);
 

src/mbgl/renderer/layers/render_line_layer.hpp

@@ -92,8 +92,6 @@ private:
     gfx::ShaderGroupPtr lineGradientShaderGroup;
     gfx::ShaderGroupPtr lineSDFShaderGroup;
     gfx::ShaderGroupPtr linePatternShaderGroup;
-
-    gfx::DrawableTweakerPtr iconTweaker;
 #endif
 };