1 files changed, 35 insertions, 0 deletions
diff --git a/big-atlas-tool/big-atlas.hpp b/big-atlas-tool/big-atlas.hpp
new file mode 100644
index 00000000..8d3f166a
--- /dev/null
+++ b/big-atlas-tool/big-atlas.hpp
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <Magnum/Magnum.h>
+#include <Magnum/Math/Vector2.h>
+#include <opencv2/core/mat.hpp>
+
+namespace std::filesystem { class path; }
+
+struct big_atlas_frame {
+    cv::Mat4b frame;
+    Magnum::Vector2i position;
+};
+
+struct big_atlas_row {
+    std::vector<big_atlas_frame> frames;
+    int xpos = 0, ypos = 0;
+};
+
+struct big_atlas_builder {
+    [[nodiscard]] std::vector<big_atlas_frame> add_atlas(const std::filesystem::path& filename);
+    big_atlas_frame& add_frame(const cv::Mat4b& frame);
+    constexpr Magnum::Vector2i size() const { return {maxy, maxx}; }
+    const std::vector<big_atlas_row>& rows() const { return _rows; }
+
+private:
+    std::tuple<big_atlas_row&, int, int> advance();
+    std::vector<big_atlas_row> _rows = {{}};
+    int ypos = 0, maxx = 0, maxy = 0;
+
+    static constexpr Magnum::Vector2i TILE_SIZE = { 100, 100 },
+                                      MAX_TEXTURE_SIZE = { 500, 500 };
+
+    static_assert(!!TILE_SIZE[0] && !!TILE_SIZE[1] && !!MAX_TEXTURE_SIZE[0] && !!MAX_TEXTURE_SIZE[1]);
+    static_assert(MAX_TEXTURE_SIZE[0] >= TILE_SIZE[0] && MAX_TEXTURE_SIZE[1] >= TILE_SIZE[1]);
+};