1 files changed, 54 insertions, 0 deletions
diff --git a/src/wall-atlas.cpp b/src/wall-atlas.cpp
new file mode 100644
index 00000000..9b711f60
--- /dev/null
+++ b/src/wall-atlas.cpp
@@ -0,0 +1,54 @@
+#include "wall-atlas.hpp"
+#include "compat/assert.hpp"
+#include <utility>
+#include <Magnum/ImageView.h>
+#include <Magnum/GL/TextureFormat.h>
+
+namespace floormat {
+
+size_t wall_atlas::enum_to_index(enum rotation r)
+{
+    fm_debug_assert(r < rotation_COUNT);
+
+    auto x = uint8_t(r);
+    x >>= 1;
+    return x;
+}
+
+wall_atlas::wall_atlas(wall_info info, const ImageView2D& image,
+                       ArrayView<const wall_frame_set> rotations,
+                       ArrayView<const wall_frame> frames) :
+    _array{NoInit, frames.size()}, _info(std::move(info))
+{
+    fm_assert(info.depth > 0);
+    fm_assert(rotations.size() <= _rotations.size());
+    _rotation_count = (uint8_t)rotations.size();
+    for (auto i = 0uz; const auto& fr : frames)
+        _array[i++] = fr;
+    for (auto i = 0uz; const auto& r : rotations)
+        _rotations[i++] = r;
+
+    _texture.setLabel(_name)
+            .setWrapping(GL::SamplerWrapping::ClampToEdge)
+            .setMagnificationFilter(GL::SamplerFilter::Nearest)
+            .setMinificationFilter(GL::SamplerFilter::Linear)
+            .setMaxAnisotropy(1)
+            .setBorderColor(Color4{1, 0, 0, 1})
+            .setStorage(1, GL::textureFormat(image.format()), image.size())
+            .setSubImage(0, {}, image);
+}
+
+wall_atlas::wall_atlas() = default;
+wall_atlas::~wall_atlas() noexcept = default;
+const wall_frame_set& wall_atlas::frameset(size_t i) const { return _rotations[i]; }
+const wall_frame_set& wall_atlas::frameset(enum rotation r) const { return frameset(enum_to_index(r)); }
+const ArrayView<const wall_frame> wall_atlas::array() const { return _array; }
+StringView wall_atlas::name() const { return _info.name; }
+
+ArrayView<const wall_frame> wall_frames::items(const wall_atlas& a) const
+{
+    fm_debug_assert(index != (uint32_t)-1);
+    return { a.array() + index, count };
+}
+
+} // namespace floormat