1 files changed, 53 insertions, 0 deletions
diff --git a/archive/src/systems/screenspace.h b/archive/src/systems/screenspace.h
new file mode 100644
index 0000000..5f0c579
--- /dev/null
+++ b/archive/src/systems/screenspace.h
@@ -0,0 +1,53 @@
+/**
+ * @brief Drawing shapes for UI or other reasons in screenspace
+ */
+#pragma once
+
+#include "colours.h"
+#include "darray.h"
+#include "defines.h"
+#include "render_types.h"
+
+/** A draw_cmd packet for rendering a rectangle */
+struct draw_rect {
+  i32 x, y;  // signed ints so we can draw things offscreen (e.g. a window half inside the viewport)
+  u32 width, height;
+  rgba colour;
+  // TODO: border colour, gradients
+};
+
+/** A draw_cmd packet for rendering a circle */
+struct draw_circle {
+  i32 x, y;
+  f32 radius;
+  rgba colour;
+};
+
+/** @brief Tagged union that represents a UI shape to be drawn. */
+typedef struct draw_cmd {
+  enum { DRAW_RECT, CIRCLE } draw_cmd_type;
+  union {
+    struct draw_rect rect;
+    struct draw_circle circle;
+  };
+} draw_cmd;
+
+KITC_DECL_TYPED_ARRAY(draw_cmd)
+
+typedef struct screenspace_state {
+  u32 rect_vbo;
+  u32 rect_vao;
+  // shader rect_shader;
+  draw_cmd_darray* draw_cmd_buf;
+} screenspace_state;
+
+// --- Lifecycle
+bool screenspace_2d_init(screenspace_state* state);
+void screenspace_2d_shutdown(screenspace_state* state);
+/** Drains the draw_cmd buffer and emits draw calls to render each one */
+void screenspace_2d_render(screenspace_state* state);
+
+struct core;
+
+/** @brief Draw a rectangle to the screen. (0,0) is the bottom-left */
+void draw_rectangle(struct core* core, rgba colour, i32 x, i32 y, u32 width, u32 height);
+\ No newline at end of file