add canvas_buffer to api

applications/services/gui/canvas.c

@@ -1,4 +1,5 @@
 #include "canvas_i.h"
+#include "canvas.h"
 #include "icon_animation_i.h"
 
 #include <furi.h>

applications/services/gui/canvas.h

@@ -85,6 +85,22 @@ typedef enum {
 /** Canvas anonymous structure */
 typedef struct Canvas Canvas;
 
+/** Get canvas buffer.
+ *
+ * @param      canvas  Canvas instance
+ *
+ * @return     pointer to buffer
+ */
+uint8_t* canvas_get_buffer(Canvas* canvas);
+
+/** Get canvas buffer size.
+ *
+ * @param      canvas  Canvas instance
+ *
+ * @return     size of canvas in bytes
+ */
+size_t canvas_get_buffer_size(const Canvas* canvas);
+
 /** Reset canvas drawing tools configuration
  *
  * @param      canvas  Canvas instance

applications/services/gui/canvas_i.h

@@ -61,22 +61,6 @@ Canvas* canvas_init(void);
  */
 void canvas_free(Canvas* canvas);
 
-/** Get canvas buffer.
- *
- * @param      canvas  Canvas instance
- *
- * @return     pointer to buffer
- */
-uint8_t* canvas_get_buffer(Canvas* canvas);
-
-/** Get canvas buffer size.
- *
- * @param      canvas  Canvas instance
- *
- * @return     size of canvas in bytes
- */
-size_t canvas_get_buffer_size(const Canvas* canvas);
-
 /** Set drawing region relative to real screen buffer
  *
  * @param      canvas    Canvas instance