rearrange

include/gfx.h

@@ -0,0 +1,43 @@
+#pragma once
+#include <stdint.h>
+#include <stdbool.h>
+
+// compatibility for adafruit fonts
+#ifndef PROGMEM
+#define PROGMEM
+#endif
+
+typedef struct {
+    uint16_t bitmapOffset;
+    uint8_t  width, height;
+    uint8_t  xAdvance;
+    int8_t   xOffset, yOffset;
+} GFXglyph;
+
+typedef struct {
+    const uint8_t  *bitmap;
+    const GFXglyph *glyph;
+    uint8_t first, last;
+    uint8_t yAdvance;
+} GFXfont;
+
+/**
+ * @brief Canvas struct for the gfx library
+ * Functions take the context and x,y coordinates of a pixel
+ *
+ * @param ctx any context that the draw/clear functions might need, ie display device
+ * @param draw_pixel_callback function that gets called to draw a pixel
+ * @param clear_pixel_callback function that gets called to clear a pixel
+ */
+typedef struct {
+    void (*draw_pixel_callback)(void *ctx, uint8_t x, uint8_t y);
+    void (*clear_pixel_callback)(void *ctx, uint8_t x, uint8_t y);
+    void *ctx;
+} gfx_canvas_t;
+
+int16_t gfx_string_width(const GFXfont *f, const char *s);
+int16_t gfx_draw_string(const gfx_canvas_t *canvas, const GFXfont* f, int16_t x, int16_t y, const char *s, bool inverted);
+int16_t gfx_draw_string_centered(const gfx_canvas_t *canvas, const GFXfont *f, int16_t centerpoint, int16_t y, const char *s, bool inverted);
+void gfx_draw_line(const gfx_canvas_t *canvas, uint8_t start_x, uint8_t start_y, uint8_t end_x, uint8_t end_y, bool inverted);
+void gfx_draw_box(const gfx_canvas_t *canvas, uint8_t pos_x, uint8_t pos_y, uint8_t size_x, uint8_t size_y, bool inverted);
+void gfx_fill_box(const gfx_canvas_t *canvas, uint8_t pos_x, uint8_t pos_y, uint8_t size_x, uint8_t size_y, bool inverted);