cfb: support non vtiled displays

Added support for drawing points on non-vtiled displays.

Signed-off-by: Yishai Jaffe <[email protected]>

Author: yishai1999

subsys/fb/cfb.c

@@ -273,8 +273,16 @@ static uint8_t draw_char_htmono(const struct char_framebuffer *fb,
 static inline void draw_point(struct char_framebuffer *fb, int16_t x, int16_t y)
 {
 	const bool need_reverse = ((fb->screen_info & SCREEN_INFO_MONO_MSB_FIRST) != 0);
-	const size_t index = ((y / 8) * fb->x_res);
-	uint8_t m = BIT(y % 8);
+	size_t index;
+	uint8_t m;
+
+	if ((fb->screen_info & SCREEN_INFO_MONO_VTILED) != 0) {
+		index = (x + (y / 8) * fb->x_res);
+		m = BIT(y % 8);
+	} else {
+		index = ((x / 8) + y * (fb->x_res / 8));
+		m = BIT(x % 8);
+	}
 
 	if (x < 0 || x >= fb->x_res) {
 		return;
@@ -288,7 +296,7 @@ static inline void draw_point(struct char_framebuffer *fb, int16_t x, int16_t y)
 		m = byte_reverse(m);
 	}
 
-	fb->buf[index + x] |= m;
+	fb->buf[index] |= m;
 }
 
 static void draw_line(struct char_framebuffer *fb, int16_t x0, int16_t y0, int16_t x1, int16_t y1)