mirror of
https://github.com/daveallie/crosspoint-reader.git
synced 2026-02-04 14:47:37 +03:00
f9b604f04e
## Summary * **What is the goal of this PR?** Add support for XTC (XTeink X4 native) ebook format, which contains pre-rendered 480x800 1-bit bitmap pages optimized for e-ink displays. * **What changes are included?** - New `lib/Xtc/` library with XtcParser for reading XTC files - XtcReaderActivity for displaying XTC pages on e-ink display - XTC file detection in FileSelectionActivity - Cover BMP generation from first XTC page - Correct XTG page header structure (22 bytes) and bit polarity handling ## Additional Context - XTC files contain pre-rendered bitmap pages with embedded status bar (page numbers, progress %) - XTG page header: 22 bytes (magic + dimensions + reserved fields + bitmap size) - Bit polarity: 0 = black, 1 = white - No runtime text rendering needed - pages display directly on e-ink - Faster page display compared to EPUB since no parsing/rendering required - Memory efficient: loads one page at a time (48KB per page) - Tested with XTC files generated from https://x4converter.rho.sh/ - Verified correct page alignment and color rendering - Please report any issues if you test with XTC files from other sources. --------- Co-authored-by: Dave Allie <dave@daveallie.com>
98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
/**
|
|
* Xtc.h
|
|
*
|
|
* Main XTC ebook class for CrossPoint Reader
|
|
* Provides EPUB-like interface for XTC file handling
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
|
|
#include "Xtc/XtcParser.h"
|
|
#include "Xtc/XtcTypes.h"
|
|
|
|
/**
|
|
* XTC Ebook Handler
|
|
*
|
|
* Handles XTC file loading, page access, and cover image generation.
|
|
* Interface is designed to be similar to Epub class for easy integration.
|
|
*/
|
|
class Xtc {
|
|
std::string filepath;
|
|
std::string cachePath;
|
|
std::unique_ptr<xtc::XtcParser> parser;
|
|
bool loaded;
|
|
|
|
public:
|
|
explicit Xtc(std::string filepath, const std::string& cacheDir) : filepath(std::move(filepath)), loaded(false) {
|
|
// Create cache key based on filepath (same as Epub)
|
|
cachePath = cacheDir + "/xtc_" + std::to_string(std::hash<std::string>{}(this->filepath));
|
|
}
|
|
~Xtc() = default;
|
|
|
|
/**
|
|
* Load XTC file
|
|
* @return true on success
|
|
*/
|
|
bool load();
|
|
|
|
/**
|
|
* Clear cached data
|
|
* @return true on success
|
|
*/
|
|
bool clearCache() const;
|
|
|
|
/**
|
|
* Setup cache directory
|
|
*/
|
|
void setupCacheDir() const;
|
|
|
|
// Path accessors
|
|
const std::string& getCachePath() const { return cachePath; }
|
|
const std::string& getPath() const { return filepath; }
|
|
|
|
// Metadata
|
|
std::string getTitle() const;
|
|
|
|
// Cover image support (for sleep screen)
|
|
std::string getCoverBmpPath() const;
|
|
bool generateCoverBmp() const;
|
|
|
|
// Page access
|
|
uint32_t getPageCount() const;
|
|
uint16_t getPageWidth() const;
|
|
uint16_t getPageHeight() const;
|
|
uint8_t getBitDepth() const; // 1 = XTC (1-bit), 2 = XTCH (2-bit)
|
|
|
|
/**
|
|
* Load page bitmap data
|
|
* @param pageIndex Page index (0-based)
|
|
* @param buffer Output buffer
|
|
* @param bufferSize Buffer size
|
|
* @return Number of bytes read
|
|
*/
|
|
size_t loadPage(uint32_t pageIndex, uint8_t* buffer, size_t bufferSize) const;
|
|
|
|
/**
|
|
* Load page with streaming callback
|
|
* @param pageIndex Page index
|
|
* @param callback Callback for each chunk
|
|
* @param chunkSize Chunk size
|
|
* @return Error code
|
|
*/
|
|
xtc::XtcError loadPageStreaming(uint32_t pageIndex,
|
|
std::function<void(const uint8_t* data, size_t size, size_t offset)> callback,
|
|
size_t chunkSize = 1024) const;
|
|
|
|
// Progress calculation
|
|
uint8_t calculateProgress(uint32_t currentPage) const;
|
|
|
|
// Check if file is loaded
|
|
bool isLoaded() const { return loaded; }
|
|
|
|
// Error information
|
|
xtc::XtcError getLastError() const;
|
|
};
|