png_decoder.h

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#pragma once
 
#include "esphome/core/defines.h"
#include "esphome/core/helpers.h"
#include "image_decoder.h"
#include "runtime_image.h"
#ifdef USE_RUNTIME_IMAGE_PNG
#include <pngle.h>
 
namespace esphome::runtime_image {
 
class PngDecoder : public ImageDecoder {
 public:
  PngDecoder(RuntimeImage *image);
  ~PngDecoder() override;
 
  void reset() override {
    ImageDecoder::reset();
    if (this->pngle_) {
      pngle_reset(this->pngle_);
    }
    this->pixels_decoded_ = 0;
  }
 
  int prepare(size_t expected_size) override;
  int HOT decode(uint8_t *buffer, size_t size) override;
 
  void increment_pixels_decoded(uint32_t count) { this->pixels_decoded_ += count; }
  uint32_t get_pixels_decoded() const { return this->pixels_decoded_; }
 
 protected:
  pngle_t *pngle_{nullptr};
  uint32_t pixels_decoded_{0};
};
 
}  // namespace esphome::runtime_image
 
#endif  // USE_RUNTIME_IMAGE_PNG