1 files changed, 40 insertions, 0 deletions
diff --git a/src/canvas.h b/src/canvas.h
new file mode 100644
index 0000000..2bdb775
--- /dev/null
+++ b/src/canvas.h
@@ -0,0 +1,40 @@
+struct Layer {
+    unsigned int *pix;
+};
+
+struct Canvas {
+	unsigned char layer_arr_cnt, layer_arr_sz;
+	unsigned int cur_col, cur_layer;
+	unsigned int w, h, zoom;
+	char *proj_path;
+	struct Layer **layers;
+	int x, y;
+	void *back, *pres;
+	void *temp_pix;
+	uint *pres_pix;
+};
+
+typedef struct Layer Layer;
+typedef struct Canvas Canvas;
+
+extern unsigned char is_drawing;
+extern const unsigned int maxzoom; /* move to another tab */
+extern Canvas* cur_canvas;  /* current canvas */
+
+Canvas         *canvas_init(unsigned int, unsigned int, void *);
+Canvas         *canvas_import_png(const char *, void *);
+Canvas         *canvas_open(const char *, void *); /* TODO: open function per version */
+void            canvas_destroy(Canvas *);
+void            canvas_redraw(Canvas *, void *, int, int);
+void            canvas_present(Canvas *, void *);
+void            canvas_zoom_change(Canvas *, short int);
+void            canvas_point_draw(Canvas *, long int, long int);
+void            canvas_mousel_up(Canvas *);
+void            canvas_mousel_down(Canvas *, long int, long int);
+void            canvas_mouse_move(Canvas *, long int, long int);
+void            canvas_add_layer(Canvas *, unsigned char);
+void            canvas_move_x(Canvas *, long int);
+void            canvas_move_y(Canvas *, long int);
+void            canvas_refresh(Canvas *);
+unsigned char   canvas_save(Canvas *, const char *, short int);
+unsigned char   canvas_export_png(Canvas *, const char *, void *);