1 files changed, 39 insertions, 0 deletions
diff --git a/src/mbgl/shader/texture_rect_vertex.hpp b/src/mbgl/shader/texture_rect_vertex.hpp
new file mode 100644
index 0000000000..e2e2526f16
--- /dev/null
+++ b/src/mbgl/shader/texture_rect_vertex.hpp
@@ -0,0 +1,39 @@
+#pragma once
+
+#include <cstdint>
+#include <cmath>
+
+namespace mbgl {
+
+// A vertex that holds a position, offset and texture coordinate. Used for symbol layer icons and glyphs.
+class TextureRectVertex {
+public:
+    TextureRectVertex(int16_t x, int16_t y, float ox, float oy, uint16_t tx, uint16_t ty, float minzoom, float maxzoom, float labelminzoom, uint8_t labelangle)
+        : a_pos {
+              x,
+              y
+          },
+          a_offset {
+              static_cast<int16_t>(::round(ox * 64)),  // use 1/64 pixels for placement
+              static_cast<int16_t>(::round(oy * 64))
+          },
+          a_texture_pos {
+              static_cast<uint16_t>(tx / 4),
+              static_cast<uint16_t>(ty / 4)
+          },
+          a_data {
+              static_cast<uint8_t>(labelminzoom * 10), // 1/10 zoom levels: z16 == 160
+              static_cast<uint8_t>(labelangle),
+              static_cast<uint8_t>(minzoom * 10),
+              static_cast<uint8_t>(::fmin(maxzoom, 25) * 10)
+          } {}
+
+    const int16_t a_pos[2];
+    const int16_t a_offset[2];
+    const uint16_t a_texture_pos[2];
+    const uint8_t a_data[4];
+
+    static void bind(const int8_t* offset);
+};
+
+} // namespace mbgl