qoi_decoder.h

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#pragma once
 
#include "esphome/core/defines.h"
#ifdef USE_RUNTIME_IMAGE_QOI
 
#include <memory>
 
#include "image_decoder.h"
#include "runtime_image.h"
 
namespace esphome::runtime_image {
 
class QoiDecoder : public ImageDecoder {
 public:
  QoiDecoder(RuntimeImage *image) : ImageDecoder(image, QOI) {}
 
  void reset() override;
  int HOT decode(uint8_t *buffer, size_t size) override;
 
  bool is_finished() const override {
    if (this->bits_per_pixel_ == 0) {
      // header not yet received, so dimensions not yet determined
      return false;
    }
    // QOI is finished when we've decoded all pixel data
    return this->paint_index_ >= static_cast<size_t>(this->width_ * this->height_);
  }
 
 protected:
  std::unique_ptr<Color[]> color_table_;
  size_t current_index_{0};
  size_t paint_index_{0};
  size_t width_{0};
  size_t height_{0};
  Color last_pixel_{0, 0, 0, 255};  // QOI spec defines initial previous pixel as opaque black
  uint16_t bits_per_pixel_{0};
};
 
}  // namespace esphome::runtime_image
 
#endif  // USE_RUNTIME_IMAGE_QOI