- Add XTCH container format support (.xtch extension)
- Add XTH page format with two bit-plane, column-major storage
- Update XtcParser to handle both XTC/XTCH magic and XTG/XTH pages
- Update XtcReaderActivity for XTH column-major rendering
- Update cover BMP generation for 2-bit grayscale
- Add README with format documentation
XTH format details:
- Two bit planes stored sequentially (Bit1, then Bit2)
- Column-major order, scanned right to left
- 8 vertical pixels per byte (MSB = topmost)
- Grayscale: 0=White, 1=Dark Grey, 2=Light Grey, 3=Black
XTC pages have pre-rendered status bar, so the renderStatusBar
function is not needed. Remove it along with unused constants
and Battery.h include to fix cppcheck warnings.
Add support for XTC (XTeink X4 native) ebook format with pre-rendered
bitmap pages. Key changes:
- Add Xtc library with XtcParser for reading XTC files
- XTC format: 22-byte XTG page headers with 480x800 1-bit bitmaps
- XtcReaderActivity for displaying XTC pages on e-ink display
- Correct bit polarity: 0=black, 1=white in XTC format
- FileSelectionActivity: detect and handle .xtc files
- ReaderActivity: route to XtcReaderActivity for XTC files
- Cover BMP generation from first XTC page
XTC pages include pre-rendered status bar with page numbers and
progress, so no additional overlay is needed.
