From 69118120d9145f24a40c70675de8d5dfda5483a8 Mon Sep 17 00:00:00 2001
From: LuBeDa <lb@sell-e.de>
Date: Tue, 10 May 2022 11:56:29 +0200
Subject: [PATCH] added prev_frame for animation (#3427)

---
 esphome/components/display/display_buffer.cpp | 6 ++++++
 esphome/components/display/display_buffer.h   | 1 +
 2 files changed, 7 insertions(+)

diff --git a/esphome/components/display/display_buffer.cpp b/esphome/components/display/display_buffer.cpp
index d00fdd5240..ca866a43d2 100644
--- a/esphome/components/display/display_buffer.cpp
+++ b/esphome/components/display/display_buffer.cpp
@@ -584,6 +584,12 @@ void Animation::next_frame() {
     this->current_frame_ = 0;
   }
 }
+void Animation::prev_frame() {
+  this->current_frame_--;
+  if (this->current_frame_ < 0) {
+    this->current_frame_ = this->animation_frame_count_ - 1;
+  }
+}
 
 DisplayPage::DisplayPage(display_writer_t writer) : writer_(std::move(writer)) {}
 void DisplayPage::show() { this->parent_->show_page(this); }
diff --git a/esphome/components/display/display_buffer.h b/esphome/components/display/display_buffer.h
index 86221c5f96..33f55aa3d1 100644
--- a/esphome/components/display/display_buffer.h
+++ b/esphome/components/display/display_buffer.h
@@ -478,6 +478,7 @@ class Animation : public Image {
   int get_animation_frame_count() const;
   int get_current_frame() const;
   void next_frame();
+  void prev_frame();
 
  protected:
   int current_frame_;