## Major Features
### 1. CJK UI Font System
- Implemented external font loading system for CJK characters
- Added Source Han Sans (思源黑体) as base font for UI rendering
- Support for multiple font sizes (20pt, 22pt, 24pt)
- Font selection UI for both reader and UI fonts
- Automatic fallback to built-in fonts when external fonts unavailable
- External UI font now renders ALL characters (including ASCII) for consistent style
- Proportional spacing for external fonts (variable width per character)
### 2. Complete I18N Implementation
- Added comprehensive internationalization system
- Support for English, Chinese Simplified, and Japanese
- Translated all UI strings across the entire application
- Language selection UI in settings with native language names
- English displayed as "English"
- Chinese displayed as "简体中文"
- Japanese displayed as "日本語"
- Dynamic language switching without restart
### 3. Bug Fixes
#### Rendering Race Conditions
- Fixed race condition where parent and child Activity rendering tasks run simultaneously
- Added 500ms delay in child Activity displayTaskLoop() to wait for parent rendering completion
- Unified displayTaskLoop() logic: `if (updateRequired && !subActivity)`
- Prevents duplicate RED RAM writes and incomplete screen refreshes
**Affected Activities:**
- CategorySettingsActivity: Unified displayTaskLoop check logic
- KOReaderSettingsActivity: Added 500ms delay before first render
- CalibreSettingsActivity: Added 500ms delay before first render
- FontSelectActivity: Added 500ms delay before first render
- ClearCacheActivity: Added 500ms delay and subActivity check
- LanguageSelectActivity: Added 500ms delay in displayTaskLoop (not onEnter)
#### Button Response Issues
- Fixed CrossPointWebServer exit button requiring long press
- Added MappedInputManager::update() method
- Call update() before wasPressed() in tight HTTP processing loop
- Button presses during loop are now properly detected
#### ClearCache Crash
- Fixed FreeRTOS mutex deadlock when exiting ClearCache activity
- Added isExiting flag to prevent operations during exit
- Added clearCacheTaskHandle tracking
- Wait for clearCache task completion before deleting mutex
#### External UI Font Rendering
- Fixed ASCII characters not using external UI font (was using built-in EPD font)
- Fixed character spacing too wide (now uses proportional spacing via getGlyphMetrics)
## Technical Details
**Files Added:**
- lib/ExternalFont/: External font loading system
- lib/I18n/: Internationalization system
- lib/GfxRenderer/cjk_ui_font*.h: Pre-rendered CJK font data
- scripts/generate_cjk_ui_font.py: Font generation script
- src/activities/settings/FontSelectActivity.*: Font selection UI
- src/activities/settings/LanguageSelectActivity.*: Language selection UI
- docs/cjk-fonts.md: CJK font documentation
- docs/i18n.md: I18N documentation
**Files Modified:**
- lib/GfxRenderer/: Added CJK font rendering support with proportional spacing
- src/activities/: I18N integration across all activities
- src/MappedInputManager.*: Added update() method
- src/CrossPointSettings.cpp: Added language and font settings
**Memory Usage:**
- Flash: 94.7% (6204434 bytes / 6553600 bytes)
- RAM: 66.4% (217556 bytes / 327680 bytes)
## Testing Notes
All rendering race conditions and button response issues have been fixed and tested.
ClearCache no longer crashes when exiting.
File transfer page now responds to short press on exit button.
External UI font now renders all characters with proper proportional spacing.
Language selection page displays language names in their native scripts.
Co-authored-by: Claude (Anthropic AI Assistant)
# Summary
This PR introduces a reusable Tab Bar component and combines the Recent
Books and File Browser into a unified tabbed page called "My Library"
accessible from the Home screen.
## Features
### New Tab Bar Component
A flexible, reusable tab bar component added to `ScreenComponents` that
can be used throughout the application.
### New Scroll Indicator Component
A page position indicator for lists that span multiple pages.
**Features:**
- Up/down arrow indicators
- Current page fraction display (e.g., "1/3")
- Only renders when content spans multiple pages
### My Library Activity
A new unified view combining Recent Books and File Browser into a single
tabbed page.
**Tabs:**
- **Recent** - Shows recently opened books
- **Files** - Browse SD card directory structure
**Navigation:**
- Up/Down or Left/Right: Navigate through list items
- Left/Right (when first item selected): Switch between tabs
- Confirm: Open selected book or enter directory
- Back: Go up directory (Files tab) or return home
- Long press Back: Jump to root directory (Files tab)
**UI Elements:**
- Tab bar with selection indicator
- Scroll/page indicator on right side
- Side button hints (up/down arrows)
- Dynamic bottom button labels ("BACK" in subdirectories, "HOME" at
root)
## Tab Bar Usage
The tab bar component is designed to be reusable across different
activities. Here's how to use it:
### Basic Example
```cpp
#include "ScreenComponents.h"
void MyActivity::render() const {
renderer.clearScreen();
// Define tabs with labels and selection state
std::vector<TabInfo> tabs = {
{"Tab One", currentTab == 0}, // Selected when currentTab is 0
{"Tab Two", currentTab == 1}, // Selected when currentTab is 1
{"Tab Three", currentTab == 2} // Selected when currentTab is 2
};
// Draw tab bar at Y position 15, returns height of the tab bar
int tabBarHeight = ScreenComponents::drawTabBar(renderer, 15, tabs);
// Position your content below the tab bar
int contentStartY = 15 + tabBarHeight + 10; // Add some padding
// Draw content based on selected tab
if (currentTab == 0) {
renderTabOneContent(contentStartY);
} else if (currentTab == 1) {
renderTabTwoContent(contentStartY);
} else {
renderTabThreeContent(contentStartY);
}
renderer.displayBuffer();
}
```
Video Demo: https://share.cleanshot.com/P6NBncFS
<img width="250"
src="https://github.com/user-attachments/assets/07de4418-968e-4a88-9b42-ac5f53d8a832"
/>
<img width="250"
src="https://github.com/user-attachments/assets/e40201ed-dcc8-4568-b008-cd2bf13ebb2a"
/>
<img width="250"
src="https://github.com/user-attachments/assets/73db269f-e629-4696-b8ca-0b8443451a05"
/>
---------
Co-authored-by: Dave Allie <dave@daveallie.com>
## Summary
* This builds upon the helpful PR
https://github.com/crosspoint-reader/crosspoint-reader/pull/341, and
adds support for the setting to also apply to the XTC reader, which I
believed has just been missed and was not intentionally left out.
* XTC does not have chapter support yet, but it does skip 10 pages when
long-pressed, and so I think this is useful.
---
### AI Usage
Did you use AI tools to help write this code? No
## Summary
* **What is the goal of this PR?**
* This PR adds a setting to (additionally) map the forward page turn
onto the powerbutton when in `EPUBReaderActivity` and powerbutton short
press is not mapped to sleep mode. I find the powerbutton to be exactly
where my thumb is while reading so it is very convenient to map the
forwardpage turn to that. Maybe Im not alone with this ^^
* **What changes are included?**
## Additional Context
* Add any other information that might be helpful for the reviewer
(e.g., performance implications, potential risks, specific areas to
focus on).
## Summary
* **What is the goal of this PR?** (e.g., Fixes a bug in the user
authentication module, Implements the new feature for
file uploading.)
* **What changes are included?**
## Additional Context
* Add any other information that might be helpful for the reviewer
(e.g., performance implications, potential risks, specific areas to
focus on).
---------
Co-authored-by: ratedcounsel <hello@ratedcounsel.com>
Co-authored-by: Dave Allie <dave@daveallie.com>
## Summary
* Update EpdFontFamily::Style to be u8 instead of u32 (saving 3 bytes
per word)
* Update layout width/height to be u16 from int
* Update page element count to be u16 from u32
* Update text block element count to be u16 from u32
* Bumped section bin version to version 8
## Summary
* Swap to updated SDCardManager which uses SdFat
* Add exFAT support
* Swap to using FsFile everywhere
* Use newly exposed `SdMan` macro to get to static instance of
SDCardManager
* Move a bunch of FsHelpers up to SDCardManager
## Summary
- **What is the goal of this PR?** Add chapter selection support to the
XTC reader activity, including parsing chapter metadata from XTC files.
- **What changes are included?** Implemented XTC chapter parsing and
exposure in the XTC library, added a chapter selection activity for XTC,
integrated it into XtcReaderActivity, and normalized chapter page
indices by shifting them to 0-based.
## Additional Context
- The reader uses 0-based page indexing (first page = 0), but the XTC
chapter table appears to be 1-based (first page = 1), so chapter
start/end pages are shifted down by 1 during parsing.
## Summary
**What is the goal of this PR?**
Adds a setting to swap the front buttons. The default functionality are:
Back/Confirm/Left/Right. When this setting is enabled they become:
Left/Right/Back/Confirm. This makes it more comfortable to use when
holding in your right hand since your thumb can more easily rest on the
next button. The original firmware has a similar setting.
**What changes are included?**
- Add the new setting.
- Create a mapper to dynamically switch the buttons based on the
setting.
- Use mapper on the various activity screens.
- Update the button hints to reflect the swapped buttons.
## Additional Context
Full disclosure: I used Codex CLI to put this PR together, but did
review it to make sure it makes sense.
Also tested on my device:
https://share.cleanshot.com/k76891NY
## 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>
