1 files changed, 51 insertions, 0 deletions
diff --git a/src/mbgl/renderer/image_atlas.hpp b/src/mbgl/renderer/image_atlas.hpp
new file mode 100644
index 0000000000..b3cc166eff
--- /dev/null
+++ b/src/mbgl/renderer/image_atlas.hpp
@@ -0,0 +1,51 @@
+#pragma once
+
+#include <mbgl/style/image_impl.hpp>
+#include <mbgl/util/rect.hpp>
+
+#include <mapbox/shelf-pack.hpp>
+
+#include <array>
+
+namespace mbgl {
+
+class ImagePosition {
+public:
+    ImagePosition(const mapbox::Bin&, const style::Image::Impl&);
+
+    float pixelRatio;
+    Rect<uint16_t> textureRect;
+
+    std::array<uint16_t, 2> tl() const {
+        return {{
+            textureRect.x,
+            textureRect.y
+        }};
+    }
+
+    std::array<uint16_t, 2> br() const {
+        return {{
+            static_cast<uint16_t>(textureRect.x + textureRect.w),
+            static_cast<uint16_t>(textureRect.y + textureRect.h)
+        }};
+    }
+
+    std::array<float, 2> displaySize() const {
+        return {{
+            textureRect.w / pixelRatio,
+            textureRect.h / pixelRatio,
+        }};
+    }
+};
+
+using ImagePositions = std::map<std::string, ImagePosition>;
+
+class ImageAtlas {
+public:
+    PremultipliedImage image;
+    ImagePositions positions;
+};
+
+ImageAtlas makeImageAtlas(const ImageMap&);
+
+} // namespace mbgl