Split display_buffer sub-components into own files (#4950)

* Split display_buffer sub-components into own files

Move the Image, Animation and Font classes to their own h/cpp pairs,
instead of having everything into the display_buffer h/cpp files.

* Fixed COLOR_ON duplicate definition

esphome/components/display/animation.cpp

@@ -0,0 +1,69 @@
+#include "animation.h"
+
+#include "esphome/core/hal.h"
+
+namespace esphome {
+namespace display {
+
+Animation::Animation(const uint8_t *data_start, int width, int height, uint32_t animation_frame_count, ImageType type)
+    : Image(data_start, width, height, type),
+      animation_data_start_(data_start),
+      current_frame_(0),
+      animation_frame_count_(animation_frame_count),
+      loop_start_frame_(0),
+      loop_end_frame_(animation_frame_count_),
+      loop_count_(0),
+      loop_current_iteration_(1) {}
+void Animation::set_loop(uint32_t start_frame, uint32_t end_frame, int count) {
+  loop_start_frame_ = std::min(start_frame, animation_frame_count_);
+  loop_end_frame_ = std::min(end_frame, animation_frame_count_);
+  loop_count_ = count;
+  loop_current_iteration_ = 1;
+}
+
+uint32_t Animation::get_animation_frame_count() const { return this->animation_frame_count_; }
+int Animation::get_current_frame() const { return this->current_frame_; }
+void Animation::next_frame() {
+  this->current_frame_++;
+  if (loop_count_ && this->current_frame_ == loop_end_frame_ &&
+      (this->loop_current_iteration_ < loop_count_ || loop_count_ < 0)) {
+    this->current_frame_ = loop_start_frame_;
+    this->loop_current_iteration_++;
+  }
+  if (this->current_frame_ >= animation_frame_count_) {
+    this->loop_current_iteration_ = 1;
+    this->current_frame_ = 0;
+  }
+
+  this->update_data_start_();
+}
+void Animation::prev_frame() {
+  this->current_frame_--;
+  if (this->current_frame_ < 0) {
+    this->current_frame_ = this->animation_frame_count_ - 1;
+  }
+
+  this->update_data_start_();
+}
+
+void Animation::set_frame(int frame) {
+  unsigned abs_frame = abs(frame);
+
+  if (abs_frame < this->animation_frame_count_) {
+    if (frame >= 0) {
+      this->current_frame_ = frame;
+    } else {
+      this->current_frame_ = this->animation_frame_count_ - abs_frame;
+    }
+  }
+
+  this->update_data_start_();
+}
+
+void Animation::update_data_start_() {
+  const uint32_t image_size = image_type_to_width_stride(this->width_, this->type_) * this->height_;
+  this->data_start_ = this->animation_data_start_ + image_size * this->current_frame_;
+}
+
+}  // namespace display
+}  // namespace esphome