1 files changed, 70 insertions, 0 deletions
diff --git a/gui.h b/gui.h
new file mode 100644
index 0000000..50927f4
--- /dev/null
+++ b/gui.h
@@ -0,0 +1,70 @@
+#ifndef gui_h
+#define gui_h
+
+#include "rect.h"
+
+struct App;
+struct Arena;
+struct GUI;
+struct Renderer;
+
+typedef enum {
+	gui_el_type_btn,
+	gui_el_type_scrollable
+} GUI_El_Type;
+
+typedef struct GUI_El {
+	GUI_El_Type type;
+	struct GUI_El* next;
+	Rect r;
+} GUI_El;
+
+typedef struct {
+	GUI_El el;
+	char* text;
+	int hover, active;
+} GUI_Btn;
+
+typedef struct {
+	int x, y;
+} GUI_Scroll_State;
+
+typedef void (*GUI_Scrollable_Draw_Fn)(
+	struct GUI*,
+	struct Renderer*,
+	const Rect*,
+	const GUI_Scroll_State*
+);
+
+typedef struct {
+	GUI_El el;
+	GUI_Scrollable_Draw_Fn draw;
+	GUI_Scroll_State* ss;
+} GUI_Scrollable;
+
+typedef struct GUI {
+	const struct App* app;
+	struct Arena* a;
+	GUI_El* first, * prev;
+	int cursor[2], pad;
+} GUI;
+
+int gui_text_width(const char* text, int len);
+int gui_text_height(void);
+
+void gui_begin(GUI* g, const struct App* app, struct Arena* a);
+void gui_end(GUI* g, struct Renderer* r);
+Rect gui_viewport(GUI* g);
+Rect gui_cut_left(Rect* a, int v);
+Rect gui_cut_right(Rect* a, int v);
+Rect gui_cut_down(Rect* a, int v);
+Rect gui_cut_up(Rect* a, int v);
+int gui_btn(GUI* g, Rect r, const char* text);
+void gui_scrollable(
+	GUI* g,
+	Rect r,
+	GUI_Scroll_State* state,
+	GUI_Scrollable_Draw_Fn fn
+);
+
+#endif