reorganized repo to show clear module boundaries

src/lib/include/paradiso/bitmap.hpp

@@ -0,0 +1,47 @@
+#ifndef PARADISO_BITMAP_HPP
+#define PARADISO_BITMAP_HPP
+
+#include "geometry.hpp"
+#include "globals.hpp"
+#include "rgba.hpp"
+
+#include <type_traits>
+#include <vector>
+#include <cassert>
+
+namespace paradiso {
+struct Bitmap final {
+
+    constexpr static Bitmap empty(Size size) noexcept {
+        return {.size = size, .data = std::vector<RGBA>{size.area()}};
+    }
+
+    template <typename... Arguments>
+    static constexpr Bitmap from_data(Size size, Arguments... values) noexcept {
+        assert(sizeof...(Arguments) == size.height * size.width);
+        return {
+            .size = size,
+            .data = {values...}
+            };
+    }
+
+    constexpr auto fill(const RGBA& color) noexcept {
+        std::fill(data.begin(), data.end(), color);
+        return *this;
+    }
+
+    constexpr RGBA& pixel(std::integral auto x, std::integral auto y) {
+        return data[y * size.width + x];
+    }
+
+    constexpr const RGBA& pixel(std::integral auto x,
+                                std::integral auto y) const {
+        return data[y * size.width + x];
+    }
+
+    Size size{.width = 0, .height = 0};
+    std::vector<RGBA> data{};
+};
+} // namespace paradiso
+
+#endif