jpeg_decoder.h

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#pragma once
#include "image_decoder.h"
#include "runtime_image.h"
#include "esphome/core/defines.h"
#include "esphome/core/helpers.h"
#ifdef USE_RUNTIME_IMAGE_JPEG
#include <JPEGDEC.h>
 
namespace esphome::runtime_image {
 
class JpegDecoder : public ImageDecoder {
 public:
  JpegDecoder(RuntimeImage *image) : ImageDecoder(image, JPEG) {}
  ~JpegDecoder() override {}
 
  int HOT decode(uint8_t *buffer, size_t size) override;
 
  bool uses_direct_rgb565() const { return this->direct_rgb565_; }
  void draw_rgb565(int x, int y, int w, int h, const uint8_t *pixels);
 
 protected:
  bool prepare_rgb565_scaling_(int width, int height);
 
  JPEGDEC jpeg_{};
  FixedVector<uint16_t> x_boundaries_{};
  FixedVector<uint16_t> y_boundaries_{};
  int source_width_{0};
  int source_height_{0};
  bool direct_rgb565_{false};
};
 
}  // namespace esphome::runtime_image
 
#endif  // USE_RUNTIME_IMAGE_JPEG