From a31fb3c987b7011b7ccb7735f8210f2feaff1d90 Mon Sep 17 00:00:00 2001
From: Raph <rafal83@users.noreply.github.com>
Date: Wed, 15 Mar 2023 23:23:01 +0100
Subject: [PATCH] Add option flip_x (#4555)

* Adding flip_x

* Adding flip_x

* Adding flip_x

* Adding flip_x

* Adding flip_x

* convert tab to space

* update format
---
 esphome/components/max7219digit/display.py       |  3 +++
 esphome/components/max7219digit/max7219digit.cpp | 12 ++++++++++--
 esphome/components/max7219digit/max7219digit.h   |  2 ++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/esphome/components/max7219digit/display.py b/esphome/components/max7219digit/display.py
index 2753f70eef..faa8a08f4a 100644
--- a/esphome/components/max7219digit/display.py
+++ b/esphome/components/max7219digit/display.py
@@ -7,6 +7,7 @@ CODEOWNERS = ["@rspaargaren"]
 DEPENDENCIES = ["spi"]
 
 CONF_ROTATE_CHIP = "rotate_chip"
+CONF_FLIP_X = "flip_x"
 CONF_SCROLL_SPEED = "scroll_speed"
 CONF_SCROLL_DWELL = "scroll_dwell"
 CONF_SCROLL_DELAY = "scroll_delay"
@@ -67,6 +68,7 @@ CONFIG_SCHEMA = (
                 CONF_SCROLL_DWELL, default="1000ms"
             ): cv.positive_time_period_milliseconds,
             cv.Optional(CONF_REVERSE_ENABLE, default=False): cv.boolean,
+            cv.Optional(CONF_FLIP_X, default=False): cv.boolean,
         }
     )
     .extend(cv.polling_component_schema("500ms"))
@@ -91,6 +93,7 @@ async def to_code(config):
     cg.add(var.set_scroll(config[CONF_SCROLL_ENABLE]))
     cg.add(var.set_scroll_mode(config[CONF_SCROLL_MODE]))
     cg.add(var.set_reverse(config[CONF_REVERSE_ENABLE]))
+    cg.add(var.set_flip_x([CONF_FLIP_X]))
 
     if CONF_LAMBDA in config:
         lambda_ = await cg.process_lambda(
diff --git a/esphome/components/max7219digit/max7219digit.cpp b/esphome/components/max7219digit/max7219digit.cpp
index 1b9ae230f7..c65b8e4823 100644
--- a/esphome/components/max7219digit/max7219digit.cpp
+++ b/esphome/components/max7219digit/max7219digit.cpp
@@ -261,13 +261,21 @@ void MAX7219Component::send64pixels(uint8_t chip, const uint8_t pixels[8]) {
     if (this->orientation_ == 0) {
       for (uint8_t i = 0; i < 8; i++) {
         // run this loop 8 times for all the pixels[8] received
-        b |= ((pixels[i] >> col) & 1) << (7 - i);  // change the column bits into row bits
+        if (this->flip_x_) {
+          b |= ((pixels[i] >> col) & 1) << i;  // change the column bits into row bits
+        } else {
+          b |= ((pixels[i] >> col) & 1) << (7 - i);  // change the column bits into row bits
+        }
       }
     } else if (this->orientation_ == 1) {
       b = pixels[col];
     } else if (this->orientation_ == 2) {
       for (uint8_t i = 0; i < 8; i++) {
-        b |= ((pixels[i] >> (7 - col)) & 1) << i;
+        if (this->flip_x_) {
+          b |= ((pixels[i] >> (7 - col)) & 1) << (7 - i);
+        } else {
+          b |= ((pixels[i] >> (7 - col)) & 1) << i;
+        }
       }
     } else {
       b = pixels[7 - col];
diff --git a/esphome/components/max7219digit/max7219digit.h b/esphome/components/max7219digit/max7219digit.h
index 3619478697..17e369a9d9 100644
--- a/esphome/components/max7219digit/max7219digit.h
+++ b/esphome/components/max7219digit/max7219digit.h
@@ -67,6 +67,7 @@ class MAX7219Component : public PollingComponent,
   void set_scroll(bool on_off) { this->scroll_ = on_off; };
   void set_scroll_mode(ScrollMode mode) { this->scroll_mode_ = mode; };
   void set_reverse(bool on_off) { this->reverse_ = on_off; };
+  void set_flip_x(bool flip_x) { this->flip_x_ = flip_x; };
 
   void send_char(uint8_t chip, uint8_t data);
   void send64pixels(uint8_t chip, const uint8_t pixels[8]);
@@ -108,6 +109,7 @@ class MAX7219Component : public PollingComponent,
   ChipLinesStyle chip_lines_style_;
   bool scroll_;
   bool reverse_;
+  bool flip_x_;
   bool update_{false};
   uint16_t scroll_speed_;
   uint16_t scroll_delay_;