Add faster pixels drawing methode

Adds a new method for printing graphic and complex shapes onto the display with python. Works with a byte string containing pixels that is interpreted by epicardium.

epicardium/modules/display.c

@@ -76,12 +76,37 @@ int epic_disp_clear(uint16_t color)
 	}
 }
 
+int epic_disp_pixels(
+	const uint8_t *data,
+	size_t data_length,
+	uint8_t offset_x,
+	uint8_t offset_y
+) {
+	int cl = check_lock();
+
+	if (cl < 0) {
+		return cl;
+	} else {
+		for (int i = 0; i < data_length; i += 4) {
+			uint8_t x = data[i] + offset_x;
+			uint8_t y = data[i + 1] + offset_y;
+
+			uint16_t color = (data[i + 3] << 8) | data[i + 2];
+
+			// no checks nessesary (done in gfx)
+			gfx_setpixel(&display_screen, x, y, color);
+		}
+		return 0;
+	}
+}
+
 int epic_disp_pixel(int16_t x, int16_t y, uint16_t color)
 {
 	int cl = check_lock();
 	if (cl < 0) {
 		return cl;
 	} else {
+		// no checks nessesary (done in gfx)
 		gfx_setpixel(&display_screen, x, y, color);
 		return 0;
 	}