Xteink-X4-crosspoint-reader/lib/JpegToBmpConverter/JpegToBmpConverter.h

#pragma once

class FsFile;
class Print;
class ZipFile;

class JpegToBmpConverter {
  static unsigned char jpegReadCallback(unsigned char* pBuf, unsigned char buf_size,
                                        unsigned char* pBytes_actually_read, void* pCallback_data);
  static bool jpegFileToBmpStreamInternal(class FsFile& jpegFile, Print& bmpOut, int targetWidth, int targetHeight,
                                          bool oneBit);

 public:
  static bool jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut);
  // Convert with custom target size (for thumbnails)
  static bool jpegFileToBmpStreamWithSize(FsFile& jpegFile, Print& bmpOut, int targetMaxWidth, int targetMaxHeight);
  // Convert to 1-bit BMP (black and white only, no grays) for fast home screen rendering
  static bool jpegFileTo1BitBmpStreamWithSize(FsFile& jpegFile, Print& bmpOut, int targetMaxWidth, int targetMaxHeight);
  // Extract JPEG dimensions without loading full image
  static bool getJpegDimensions(FsFile& jpegFile, int* width, int* height);
};