refactor canvas

applications/gui/canvas.h

@@ -1,24 +1,35 @@
 #pragma once
 
 #include <stdint.h>
-#include <u8g2.h>
 
-#define COLOR_WHITE 0x00
-#define COLOR_BLACK 0x01
-
-#define CANVAS_FONT_PRIMARY u8g2_font_Born2bSportyV2_tr
-#define CANVAS_FONT_SECONDARY u8g2_font_HelvetiPixel_tr
+typedef enum {
+	ColorWhite = 0x00,
+	ColorBlack = 0x01,
+} Color;
 
 typedef struct Canvas Canvas;
-typedef const uint8_t* font_t;
+typedef const uint8_t* Font;
 
-uint8_t canvas_width(Canvas* canvas);
-uint8_t canvas_height(Canvas* canvas);
+struct _CanvasApi;
 
-void canvas_clear(Canvas* canvas);
+typedef struct _CanvasApi CanvasApi;
 
-void canvas_color_set(Canvas* canvas, uint8_t color);
+typedef struct {
+	Font primary;
+	Font secondary;
+} Fonts;
 
-void canvas_font_set(Canvas* canvas, font_t font);
+struct {
+    Canvas canvas;
+    Fonts* fonts;
+    
+    uint8_t (*width)(CanvasApi* canvas);
+    uint8_t (*height)(CanvasApi* canvas);
 
-void canvas_str_draw(Canvas* canvas, uint8_t x, uint8_t y, const char* str);
+    void (*clear)(CanvasApi* canvas);
+
+    void (*canvas_color_set)(CanvasApi* canvas, Color color);
+    void (*canvas_font_set)(CanvasApi* canvas, Font font);
+
+    void (*draw_str)(CanvasApi* canvas, uint8_t x, uint8_t y, const char* str);
+} _CanvasApi;