[core] Per-bucket icon atlases

src/mbgl/programs/fill_program.cpp

@@ -1,5 +1,5 @@
 #include <mbgl/programs/fill_program.hpp>
-#include <mbgl/sprite/sprite_atlas.hpp>
+#include <mbgl/renderer/image_atlas.hpp>
 #include <mbgl/renderer/cross_faded_property_evaluator.hpp>
 #include <mbgl/tile/tile_id.hpp>
 #include <mbgl/map/transform_state.hpp>
@@ -14,8 +14,8 @@ FillPatternUniforms::Values
 FillPatternUniforms::values(mat4 matrix,
                             Size framebufferSize,
                             Size atlasSize,
-                            const SpriteAtlasElement& a,
-                            const SpriteAtlasElement& b,
+                            const ImagePosition& a,
+                            const ImagePosition& b,
                             const Faded<std::string>& fading,
                             const UnwrappedTileID& tileID,
                             const TransformState& state)