mod: Phase 2c-e — GfxRenderer, themes, SleepActivity, SettingsActivity, platformio

- Add drawPixelGray to GfxRenderer for letterbox fill rendering
- Add PRERENDER_THUMB_HEIGHTS to UITheme for placeholder cover generation
- Add [env:mod] build environment to platformio.ini
- Implement sleep screen letterbox fill (solid/dithered) with edge
  caching in SleepActivity, including placeholder cover fallback
- Add Clock settings category to SettingsActivity with timezone,
  NTP sync, and set-time actions; replace CalibreSettings with
  OpdsServerListActivity; add DynamicEnum rendering support
- Add long-press book management to RecentBooksActivity

Made-with: Cursor

lib/GfxRenderer/GfxRenderer.cpp

@@ -180,6 +180,16 @@ void GfxRenderer::drawPixel(const int x, const int y, const bool state) const {
   }
 }
 
+void GfxRenderer::drawPixelGray(const int x, const int y, const uint8_t val2bit) const {
+  if (renderMode == BW && val2bit < 3) {
+    drawPixel(x, y);
+  } else if (renderMode == GRAYSCALE_MSB && (val2bit == 1 || val2bit == 2)) {
+    drawPixel(x, y, false);
+  } else if (renderMode == GRAYSCALE_LSB && val2bit == 1) {
+    drawPixel(x, y, false);
+  }
+}
+
 int GfxRenderer::getTextWidth(const int fontId, const char* text, const EpdFontFamily::Style style) const {
   const auto fontIt = fontMap.find(fontId);
   if (fontIt == fontMap.end()) {

lib/GfxRenderer/GfxRenderer.h

@@ -83,6 +83,7 @@ class GfxRenderer {
 
   // Drawing
   void drawPixel(int x, int y, bool state = true) const;
+  void drawPixelGray(int x, int y, uint8_t val2bit) const;
   void drawLine(int x1, int y1, int x2, int y2, bool state = true) const;
   void drawLine(int x1, int y1, int x2, int y2, int lineWidth, bool state) const;
   void drawArc(int maxRadius, int cx, int cy, int xDir, int yDir, int lineWidth, bool state) const;

platformio.ini

@@ -72,6 +72,22 @@ build_flags =
   -DLOG_LEVEL=2 ; Set log level to debug for development builds
 
 
+[env:mod]
+extends = base
+extra_scripts =
+  ${base.extra_scripts}
+  pre:scripts/inject_mod_version.py
+build_flags =
+  ${base.build_flags}
+  -DOMIT_OPENDYSLEXIC
+  -DOMIT_HYPH_DE
+  -DOMIT_HYPH_ES
+  -DOMIT_HYPH_FR
+  -DOMIT_HYPH_IT
+  -DOMIT_HYPH_RU
+  -DENABLE_SERIAL_LOG
+  -DLOG_LEVEL=2 ; Set log level to debug for mod builds
+
 [env:gh_release]
 extends = base
 build_flags =

src/activities/boot_sleep/SleepActivity.cpp

@@ -5,14 +5,251 @@
 #include <GfxRenderer.h>
 #include <HalStorage.h>
 #include <I18n.h>
+#include <Logging.h>
+#include <PlaceholderCoverGenerator.h>
+#include <Serialization.h>
 #include <Txt.h>
 #include <Xtc.h>
 
+#include <algorithm>
+#include <cmath>
+
 #include "CrossPointSettings.h"
 #include "CrossPointState.h"
 #include "components/UITheme.h"
 #include "fontIds.h"
 #include "images/Logo120.h"
+#include "util/BookSettings.h"
+
+#define USE_SLEEP_DOUBLE_FAST_REFRESH 1
+
+namespace {
+
+constexpr int EDGE_SAMPLE_DEPTH = 20;
+constexpr uint8_t val2bitToGray(uint8_t val2bit) { return val2bit * 85; }
+
+struct LetterboxFillData {
+  uint8_t avgA = 128;
+  uint8_t avgB = 128;
+  int letterboxA = 0;
+  int letterboxB = 0;
+  bool horizontal = false;
+  bool valid = false;
+};
+
+uint8_t snapToEinkLevel(uint8_t gray) {
+  if (gray < 43) return 0;
+  if (gray < 128) return 85;
+  if (gray < 213) return 170;
+  return 255;
+}
+
+// clang-format off
+constexpr uint8_t BAYER_4X4[4][4] = {
+  {  0, 128,  32, 160},
+  {192,  64, 224,  96},
+  { 48, 176,  16, 144},
+  {240, 112, 208,  80}
+};
+// clang-format on
+
+uint8_t quantizeBayerDither(int gray, int x, int y) {
+  const int threshold = BAYER_4X4[y & 3][x & 3];
+  const int scaled = gray * 3;
+  if (scaled < 255) return (scaled + threshold >= 255) ? 1 : 0;
+  if (scaled < 510) return ((scaled - 255) + threshold >= 255) ? 2 : 1;
+  return ((scaled - 510) + threshold >= 255) ? 3 : 2;
+}
+
+constexpr uint8_t EDGE_CACHE_VERSION = 2;
+
+bool loadEdgeCache(const std::string& path, int screenWidth, int screenHeight, LetterboxFillData& data) {
+  FsFile file;
+  if (!Storage.openFileForRead("SLP", path, file)) return false;
+
+  uint8_t version;
+  serialization::readPod(file, version);
+  if (version != EDGE_CACHE_VERSION) {
+    file.close();
+    return false;
+  }
+
+  uint16_t cachedW, cachedH;
+  serialization::readPod(file, cachedW);
+  serialization::readPod(file, cachedH);
+  if (cachedW != static_cast<uint16_t>(screenWidth) || cachedH != static_cast<uint16_t>(screenHeight)) {
+    file.close();
+    return false;
+  }
+
+  uint8_t horizontal;
+  serialization::readPod(file, horizontal);
+  data.horizontal = (horizontal != 0);
+  serialization::readPod(file, data.avgA);
+  serialization::readPod(file, data.avgB);
+
+  int16_t lbA, lbB;
+  serialization::readPod(file, lbA);
+  serialization::readPod(file, lbB);
+  data.letterboxA = lbA;
+  data.letterboxB = lbB;
+
+  file.close();
+  data.valid = true;
+  return true;
+}
+
+bool saveEdgeCache(const std::string& path, int screenWidth, int screenHeight, const LetterboxFillData& data) {
+  if (!data.valid) return false;
+  FsFile file;
+  if (!Storage.openFileForWrite("SLP", path, file)) return false;
+
+  serialization::writePod(file, EDGE_CACHE_VERSION);
+  serialization::writePod(file, static_cast<uint16_t>(screenWidth));
+  serialization::writePod(file, static_cast<uint16_t>(screenHeight));
+  serialization::writePod(file, static_cast<uint8_t>(data.horizontal ? 1 : 0));
+  serialization::writePod(file, data.avgA);
+  serialization::writePod(file, data.avgB);
+  serialization::writePod(file, static_cast<int16_t>(data.letterboxA));
+  serialization::writePod(file, static_cast<int16_t>(data.letterboxB));
+  file.close();
+  return true;
+}
+
+LetterboxFillData computeEdgeAverages(const Bitmap& bitmap, int imgX, int imgY, int pageWidth, int pageHeight,
+                                      float scale, float cropX, float cropY) {
+  LetterboxFillData data;
+
+  const int cropPixX = static_cast<int>(std::floor(bitmap.getWidth() * cropX / 2.0f));
+  const int cropPixY = static_cast<int>(std::floor(bitmap.getHeight() * cropY / 2.0f));
+  const int visibleWidth = bitmap.getWidth() - 2 * cropPixX;
+  const int visibleHeight = bitmap.getHeight() - 2 * cropPixY;
+
+  if (visibleWidth <= 0 || visibleHeight <= 0) return data;
+
+  const int outputRowSize = (bitmap.getWidth() + 3) / 4;
+  auto* outputRow = static_cast<uint8_t*>(malloc(outputRowSize));
+  auto* rowBytes = static_cast<uint8_t*>(malloc(bitmap.getRowBytes()));
+  if (!outputRow || !rowBytes) {
+    free(outputRow);
+    free(rowBytes);
+    return data;
+  }
+
+  if (imgY > 0) {
+    data.horizontal = true;
+    const int scaledHeight = static_cast<int>(std::round(static_cast<float>(visibleHeight) * scale));
+    data.letterboxA = imgY;
+    data.letterboxB = pageHeight - imgY - scaledHeight;
+    if (data.letterboxB < 0) data.letterboxB = 0;
+
+    const int sampleRows = std::min(EDGE_SAMPLE_DEPTH, visibleHeight);
+    uint64_t sumTop = 0, sumBot = 0;
+    int countTop = 0, countBot = 0;
+
+    for (int bmpY = 0; bmpY < bitmap.getHeight(); bmpY++) {
+      if (bitmap.readNextRow(outputRow, rowBytes) != BmpReaderError::Ok) break;
+      const int logicalY = bitmap.isTopDown() ? bmpY : bitmap.getHeight() - 1 - bmpY;
+      if (logicalY < cropPixY || logicalY >= bitmap.getHeight() - cropPixY) continue;
+      const int outY = logicalY - cropPixY;
+
+      const bool inTop = (outY < sampleRows);
+      const bool inBot = (outY >= visibleHeight - sampleRows);
+      if (!inTop && !inBot) continue;
+
+      for (int bmpX = cropPixX; bmpX < bitmap.getWidth() - cropPixX; bmpX++) {
+        const uint8_t val = (outputRow[bmpX / 4] >> (6 - ((bmpX * 2) % 8))) & 0x3;
+        const uint8_t gray = val2bitToGray(val);
+        if (inTop) { sumTop += gray; countTop++; }
+        if (inBot) { sumBot += gray; countBot++; }
+      }
+    }
+
+    data.avgA = countTop > 0 ? static_cast<uint8_t>(sumTop / countTop) : 128;
+    data.avgB = countBot > 0 ? static_cast<uint8_t>(sumBot / countBot) : 128;
+    data.valid = true;
+  } else if (imgX > 0) {
+    data.horizontal = false;
+    const int scaledWidth = static_cast<int>(std::round(static_cast<float>(visibleWidth) * scale));
+    data.letterboxA = imgX;
+    data.letterboxB = pageWidth - imgX - scaledWidth;
+    if (data.letterboxB < 0) data.letterboxB = 0;
+
+    const int sampleCols = std::min(EDGE_SAMPLE_DEPTH, visibleWidth);
+    uint64_t sumLeft = 0, sumRight = 0;
+    int countLeft = 0, countRight = 0;
+
+    for (int bmpY = 0; bmpY < bitmap.getHeight(); bmpY++) {
+      if (bitmap.readNextRow(outputRow, rowBytes) != BmpReaderError::Ok) break;
+      const int logicalY = bitmap.isTopDown() ? bmpY : bitmap.getHeight() - 1 - bmpY;
+      if (logicalY < cropPixY || logicalY >= bitmap.getHeight() - cropPixY) continue;
+
+      for (int bmpX = cropPixX; bmpX < cropPixX + sampleCols; bmpX++) {
+        const uint8_t val = (outputRow[bmpX / 4] >> (6 - ((bmpX * 2) % 8))) & 0x3;
+        sumLeft += val2bitToGray(val);
+        countLeft++;
+      }
+      for (int bmpX = bitmap.getWidth() - cropPixX - sampleCols; bmpX < bitmap.getWidth() - cropPixX; bmpX++) {
+        const uint8_t val = (outputRow[bmpX / 4] >> (6 - ((bmpX * 2) % 8))) & 0x3;
+        sumRight += val2bitToGray(val);
+        countRight++;
+      }
+    }
+
+    data.avgA = countLeft > 0 ? static_cast<uint8_t>(sumLeft / countLeft) : 128;
+    data.avgB = countRight > 0 ? static_cast<uint8_t>(sumRight / countRight) : 128;
+    data.valid = true;
+  }
+
+  bitmap.rewindToData();
+  free(outputRow);
+  free(rowBytes);
+  return data;
+}
+
+void drawLetterboxFill(GfxRenderer& renderer, const LetterboxFillData& data, uint8_t fillMode) {
+  if (!data.valid) return;
+
+  const bool isSolid = (fillMode == CrossPointSettings::SLEEP_SCREEN_LETTERBOX_FILL::LETTERBOX_SOLID);
+  const uint8_t levelA = isSolid ? snapToEinkLevel(data.avgA) / 85 : 0;
+  const uint8_t levelB = isSolid ? snapToEinkLevel(data.avgB) / 85 : 0;
+
+  if (data.horizontal) {
+    if (data.letterboxA > 0) {
+      for (int y = 0; y < data.letterboxA; y++)
+        for (int x = 0; x < renderer.getScreenWidth(); x++) {
+          const uint8_t lv = isSolid ? levelA : quantizeBayerDither(data.avgA, x, y);
+          renderer.drawPixelGray(x, y, lv);
+        }
+    }
+    if (data.letterboxB > 0) {
+      const int start = renderer.getScreenHeight() - data.letterboxB;
+      for (int y = start; y < renderer.getScreenHeight(); y++)
+        for (int x = 0; x < renderer.getScreenWidth(); x++) {
+          const uint8_t lv = isSolid ? levelB : quantizeBayerDither(data.avgB, x, y);
+          renderer.drawPixelGray(x, y, lv);
+        }
+    }
+  } else {
+    if (data.letterboxA > 0) {
+      for (int x = 0; x < data.letterboxA; x++)
+        for (int y = 0; y < renderer.getScreenHeight(); y++) {
+          const uint8_t lv = isSolid ? levelA : quantizeBayerDither(data.avgA, x, y);
+          renderer.drawPixelGray(x, y, lv);
+        }
+    }
+    if (data.letterboxB > 0) {
+      const int start = renderer.getScreenWidth() - data.letterboxB;
+      for (int x = start; x < renderer.getScreenWidth(); x++)
+        for (int y = 0; y < renderer.getScreenHeight(); y++) {
+          const uint8_t lv = isSolid ? levelB : quantizeBayerDither(data.avgB, x, y);
+          renderer.drawPixelGray(x, y, lv);
+        }
+    }
+  }
+}
+
+}  // namespace
 
 void SleepActivity::onEnter() {
   Activity::onEnter();
@@ -137,7 +374,8 @@ void SleepActivity::renderDefaultSleepScreen() const {
   renderer.displayBuffer(HalDisplay::HALF_REFRESH);
 }
 
-void SleepActivity::renderBitmapSleepScreen(const Bitmap& bitmap) const {
+void SleepActivity::renderBitmapSleepScreen(const Bitmap& bitmap, const std::string& edgeCachePath,
+                                            uint8_t fillModeOverride) const {
   int x, y;
   const auto pageWidth = renderer.getScreenWidth();
   const auto pageHeight = renderer.getScreenHeight();
@@ -145,62 +383,99 @@ void SleepActivity::renderBitmapSleepScreen(const Bitmap& bitmap) const {
 
   LOG_DBG("SLP", "bitmap %d x %d, screen %d x %d", bitmap.getWidth(), bitmap.getHeight(), pageWidth, pageHeight);
   if (bitmap.getWidth() > pageWidth || bitmap.getHeight() > pageHeight) {
-    // image will scale, make sure placement is right
     float ratio = static_cast<float>(bitmap.getWidth()) / static_cast<float>(bitmap.getHeight());
     const float screenRatio = static_cast<float>(pageWidth) / static_cast<float>(pageHeight);
 
     LOG_DBG("SLP", "bitmap ratio: %f, screen ratio: %f", ratio, screenRatio);
     if (ratio > screenRatio) {
-      // image wider than viewport ratio, scaled down image needs to be centered vertically
       if (SETTINGS.sleepScreenCoverMode == CrossPointSettings::SLEEP_SCREEN_COVER_MODE::CROP) {
         cropX = 1.0f - (screenRatio / ratio);
-        LOG_DBG("SLP", "Cropping bitmap x: %f", cropX);
         ratio = (1.0f - cropX) * static_cast<float>(bitmap.getWidth()) / static_cast<float>(bitmap.getHeight());
       }
       x = 0;
       y = std::round((static_cast<float>(pageHeight) - static_cast<float>(pageWidth) / ratio) / 2);
-      LOG_DBG("SLP", "Centering with ratio %f to y=%d", ratio, y);
     } else {
-      // image taller than viewport ratio, scaled down image needs to be centered horizontally
       if (SETTINGS.sleepScreenCoverMode == CrossPointSettings::SLEEP_SCREEN_COVER_MODE::CROP) {
         cropY = 1.0f - (ratio / screenRatio);
-        LOG_DBG("SLP", "Cropping bitmap y: %f", cropY);
         ratio = static_cast<float>(bitmap.getWidth()) / ((1.0f - cropY) * static_cast<float>(bitmap.getHeight()));
       }
       x = std::round((static_cast<float>(pageWidth) - static_cast<float>(pageHeight) * ratio) / 2);
       y = 0;
-      LOG_DBG("SLP", "Centering with ratio %f to x=%d", ratio, x);
     }
   } else {
-    // center the image
     x = (pageWidth - bitmap.getWidth()) / 2;
     y = (pageHeight - bitmap.getHeight()) / 2;
   }
 
   LOG_DBG("SLP", "drawing to %d x %d", x, y);
+
+  const float effectiveWidth = (1.0f - cropX) * bitmap.getWidth();
+  const float effectiveHeight = (1.0f - cropY) * bitmap.getHeight();
+  const float scale =
+      std::min(static_cast<float>(pageWidth) / effectiveWidth, static_cast<float>(pageHeight) / effectiveHeight);
+
+  const uint8_t fillMode = (fillModeOverride != BookSettings::USE_GLOBAL &&
+                            fillModeOverride < CrossPointSettings::SLEEP_SCREEN_LETTERBOX_FILL_COUNT)
+                               ? fillModeOverride
+                               : SETTINGS.sleepScreenLetterboxFill;
+  const bool wantFill = (fillMode != CrossPointSettings::SLEEP_SCREEN_LETTERBOX_FILL::LETTERBOX_NONE);
+
+  LetterboxFillData fillData;
+  const bool hasLetterbox = (x > 0 || y > 0);
+  if (hasLetterbox && wantFill) {
+    bool cacheLoaded = false;
+    if (!edgeCachePath.empty()) {
+      cacheLoaded = loadEdgeCache(edgeCachePath, pageWidth, pageHeight, fillData);
+    }
+    if (!cacheLoaded) {
+      fillData = computeEdgeAverages(bitmap, x, y, pageWidth, pageHeight, scale, cropX, cropY);
+      if (fillData.valid && !edgeCachePath.empty()) {
+        saveEdgeCache(edgeCachePath, pageWidth, pageHeight, fillData);
+      }
+    }
+  }
+
   renderer.clearScreen();
 
   const bool hasGreyscale = bitmap.hasGreyscale() &&
                             SETTINGS.sleepScreenCoverFilter == CrossPointSettings::SLEEP_SCREEN_COVER_FILTER::NO_FILTER;
+  const bool isInverted =
+      SETTINGS.sleepScreenCoverFilter == CrossPointSettings::SLEEP_SCREEN_COVER_FILTER::INVERTED_BLACK_AND_WHITE;
 
+#if USE_SLEEP_DOUBLE_FAST_REFRESH
+  const bool useDoubleFast =
+      fillData.valid && fillMode == CrossPointSettings::SLEEP_SCREEN_LETTERBOX_FILL::LETTERBOX_DITHERED;
+#else
+  const bool useDoubleFast = false;
+#endif
+
+  if (useDoubleFast) {
+    renderer.clearScreen();
+    renderer.displayBuffer(HalDisplay::FAST_REFRESH);
+
+    if (fillData.valid) drawLetterboxFill(renderer, fillData, fillMode);
     renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight, cropX, cropY);
-
-  if (SETTINGS.sleepScreenCoverFilter == CrossPointSettings::SLEEP_SCREEN_COVER_FILTER::INVERTED_BLACK_AND_WHITE) {
-    renderer.invertScreen();
-  }
-
+    if (isInverted) renderer.invertScreen();
+    renderer.displayBuffer(HalDisplay::FAST_REFRESH);
+  } else {
+    if (fillData.valid) drawLetterboxFill(renderer, fillData, fillMode);
+    renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight, cropX, cropY);
+    if (isInverted) renderer.invertScreen();
     renderer.displayBuffer(HalDisplay::HALF_REFRESH);
+  }
 
   if (hasGreyscale) {
     bitmap.rewindToData();
     renderer.clearScreen(0x00);
     renderer.setRenderMode(GfxRenderer::GRAYSCALE_LSB);
+    if (fillData.valid) drawLetterboxFill(renderer, fillData, fillMode);
     renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight, cropX, cropY);
     renderer.copyGrayscaleLsbBuffers();
 
     bitmap.rewindToData();
     renderer.clearScreen(0x00);
     renderer.setRenderMode(GfxRenderer::GRAYSCALE_MSB);
+    if (fillData.valid) drawLetterboxFill(renderer, fillData, fillMode);
     renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight, cropX, cropY);
     renderer.copyGrayscaleMsbBuffers();
 
@@ -225,11 +500,10 @@ void SleepActivity::renderCoverSleepScreen() const {
   }
 
   std::string coverBmpPath;
+  std::string bookCachePath;
   bool cropped = SETTINGS.sleepScreenCoverMode == CrossPointSettings::SLEEP_SCREEN_COVER_MODE::CROP;
 
-  // Check if the current book is XTC, TXT, or EPUB
   if (FsHelpers::hasXtcExtension(APP_STATE.openEpubPath)) {
-    // Handle XTC file
     Xtc lastXtc(APP_STATE.openEpubPath, "/.crosspoint");
     if (!lastXtc.load()) {
       LOG_ERR("SLP", "Failed to load last XTC");
@@ -237,13 +511,18 @@ void SleepActivity::renderCoverSleepScreen() const {
     }
 
     if (!lastXtc.generateCoverBmp()) {
+      LOG_DBG("SLP", "XTC cover generation failed, trying placeholder");
+      PlaceholderCoverGenerator::generate(lastXtc.getCoverBmpPath(), lastXtc.getTitle(), lastXtc.getAuthor(), 480, 800);
+    }
+
+    if (!Storage.exists(lastXtc.getCoverBmpPath().c_str())) {
       LOG_ERR("SLP", "Failed to generate XTC cover bmp");
       return (this->*renderNoCoverSleepScreen)();
     }
 
     coverBmpPath = lastXtc.getCoverBmpPath();
+    bookCachePath = lastXtc.getCachePath();
   } else if (FsHelpers::hasTxtExtension(APP_STATE.openEpubPath)) {
-    // Handle TXT file - looks for cover image in the same folder
     Txt lastTxt(APP_STATE.openEpubPath, "/.crosspoint");
     if (!lastTxt.load()) {
       LOG_ERR("SLP", "Failed to load last TXT");
@@ -251,36 +530,58 @@ void SleepActivity::renderCoverSleepScreen() const {
     }
 
     if (!lastTxt.generateCoverBmp()) {
+      LOG_DBG("SLP", "TXT cover generation failed, trying placeholder");
+      PlaceholderCoverGenerator::generate(lastTxt.getCoverBmpPath(), lastTxt.getTitle(), "", 480, 800);
+    }
+
+    if (!Storage.exists(lastTxt.getCoverBmpPath().c_str())) {
       LOG_ERR("SLP", "No cover image found for TXT file");
       return (this->*renderNoCoverSleepScreen)();
     }
 
     coverBmpPath = lastTxt.getCoverBmpPath();
+    bookCachePath = lastTxt.getCachePath();
   } else if (FsHelpers::hasEpubExtension(APP_STATE.openEpubPath)) {
-    // Handle EPUB file
     Epub lastEpub(APP_STATE.openEpubPath, "/.crosspoint");
-    // Skip loading css since we only need metadata here
     if (!lastEpub.load(true, true)) {
       LOG_ERR("SLP", "Failed to load last epub");
       return (this->*renderNoCoverSleepScreen)();
     }
 
     if (!lastEpub.generateCoverBmp(cropped)) {
+      LOG_DBG("SLP", "EPUB cover generation failed, trying placeholder");
+      PlaceholderCoverGenerator::generate(lastEpub.getCoverBmpPath(cropped), lastEpub.getTitle(),
+                                          lastEpub.getAuthor(), 480, 800);
+    }
+
+    if (!Storage.exists(lastEpub.getCoverBmpPath(cropped).c_str())) {
       LOG_ERR("SLP", "Failed to generate cover bmp");
       return (this->*renderNoCoverSleepScreen)();
     }
 
     coverBmpPath = lastEpub.getCoverBmpPath(cropped);
+    bookCachePath = lastEpub.getCachePath();
   } else {
     return (this->*renderNoCoverSleepScreen)();
   }
 
+  uint8_t fillModeOverride = BookSettings::USE_GLOBAL;
+  if (!bookCachePath.empty()) {
+    auto bookSettings = BookSettings::load(bookCachePath);
+    fillModeOverride = bookSettings.letterboxFillOverride;
+  }
+
   FsFile file;
   if (Storage.openFileForRead("SLP", coverBmpPath, file)) {
     Bitmap bitmap(file);
     if (bitmap.parseHeaders() == BmpReaderError::Ok) {
       LOG_DBG("SLP", "Rendering sleep cover: %s", coverBmpPath.c_str());
-      renderBitmapSleepScreen(bitmap);
+      std::string edgeCachePath;
+      const auto dotPos = coverBmpPath.rfind(".bmp");
+      if (dotPos != std::string::npos) {
+        edgeCachePath = coverBmpPath.substr(0, dotPos) + "_edges.bin";
+      }
+      renderBitmapSleepScreen(bitmap, edgeCachePath, fillModeOverride);
       file.close();
       return;
     }

src/activities/boot_sleep/SleepActivity.h

@@ -1,4 +1,7 @@
 #pragma once
+
+#include <string>
+
 #include "../Activity.h"
 
 class Bitmap;
@@ -13,6 +16,7 @@ class SleepActivity final : public Activity {
   void renderDefaultSleepScreen() const;
   void renderCustomSleepScreen() const;
   void renderCoverSleepScreen() const;
-  void renderBitmapSleepScreen(const Bitmap& bitmap) const;
+  void renderBitmapSleepScreen(const Bitmap& bitmap, const std::string& edgeCachePath = "",
+                               uint8_t fillModeOverride = 0xFF) const;
   void renderBlankSleepScreen() const;
 };

src/activities/home/RecentBooksActivity.cpp

@@ -6,10 +6,13 @@
 
 #include <algorithm>
 
+#include "BookManageMenuActivity.h"
 #include "MappedInputManager.h"
 #include "RecentBooksStore.h"
+#include "activities/ActivityResult.h"
 #include "components/UITheme.h"
 #include "fontIds.h"
+#include "util/BookManager.h"
 
 namespace {
 constexpr unsigned long GO_HOME_MS = 1000;
@@ -44,11 +47,64 @@ void RecentBooksActivity::onExit() {
   recentBooks.clear();
 }
 
+void RecentBooksActivity::openManageMenu(const std::string& bookPath) {
+  const bool isArchived = BookManager::isArchived(bookPath);
+  const std::string capturedPath = bookPath;
+  startActivityForResult(
+      std::make_unique<BookManageMenuActivity>(renderer, mappedInput, capturedPath, isArchived, false),
+      [this, capturedPath](const ActivityResult& result) {
+        if (result.isCancelled) {
+          requestUpdate();
+          return;
+        }
+        const auto& menuResult = std::get<MenuResult>(result.data);
+        auto action = static_cast<BookManageMenuActivity::Action>(menuResult.action);
+        bool success = false;
+        switch (action) {
+          case BookManageMenuActivity::Action::ARCHIVE:
+            success = BookManager::archiveBook(capturedPath);
+            break;
+          case BookManageMenuActivity::Action::UNARCHIVE:
+            success = BookManager::unarchiveBook(capturedPath);
+            break;
+          case BookManageMenuActivity::Action::DELETE:
+            success = BookManager::deleteBook(capturedPath);
+            break;
+          case BookManageMenuActivity::Action::DELETE_CACHE:
+            success = BookManager::deleteBookCache(capturedPath);
+            break;
+          case BookManageMenuActivity::Action::REINDEX:
+            success = BookManager::reindexBook(capturedPath, false);
+            break;
+          case BookManageMenuActivity::Action::REINDEX_FULL:
+            success = BookManager::reindexBook(capturedPath, true);
+            break;
+        }
+        {
+          RenderLock lock(*this);
+          GUI.drawPopup(renderer, success ? tr(STR_DONE) : tr(STR_ACTION_FAILED));
+        }
+        loadRecentBooks();
+        selectorIndex = 0;
+        requestUpdate();
+      });
+}
+
 void RecentBooksActivity::loop() {
   const int pageItems = UITheme::getInstance().getNumberOfItemsPerPage(renderer, true, false, true, true);
 
-  if (mappedInput.wasReleased(MappedInputManager::Button::Confirm)) {
+  if (mappedInput.isPressed(MappedInputManager::Button::Confirm) && mappedInput.getHeldTime() >= LONG_PRESS_MS) {
     if (!recentBooks.empty() && selectorIndex < static_cast<int>(recentBooks.size())) {
+      ignoreNextConfirmRelease = true;
+      openManageMenu(recentBooks[selectorIndex].path);
+      return;
+    }
+  }
+
+  if (mappedInput.wasReleased(MappedInputManager::Button::Confirm)) {
+    if (ignoreNextConfirmRelease) {
+      ignoreNextConfirmRelease = false;
+    } else if (!recentBooks.empty() && selectorIndex < static_cast<int>(recentBooks.size())) {
       LOG_DBG("RBA", "Selected recent book: %s", recentBooks[selectorIndex].path.c_str());
       onSelectBook(recentBooks[selectorIndex].path);
       return;

src/activities/home/RecentBooksActivity.h

@@ -18,8 +18,11 @@ class RecentBooksActivity final : public Activity {
   // Recent tab state
   std::vector<RecentBook> recentBooks;
 
-  // Data loading
+  bool ignoreNextConfirmRelease = false;
+  static constexpr unsigned long LONG_PRESS_MS = 700;
+
   void loadRecentBooks();
+  void openManageMenu(const std::string& bookPath);
 
  public:
   explicit RecentBooksActivity(GfxRenderer& renderer, MappedInputManager& mappedInput)

src/activities/settings/SettingsActivity.cpp

@@ -3,14 +3,21 @@
 #include <GfxRenderer.h>
 #include <Logging.h>
 
+#include <algorithm>
+#include <cstdlib>
+#include <ctime>
+
 #include "ButtonRemapActivity.h"
-#include "CalibreSettingsActivity.h"
 #include "ClearCacheActivity.h"
 #include "CrossPointSettings.h"
 #include "KOReaderSettingsActivity.h"
 #include "LanguageSelectActivity.h"
 #include "MappedInputManager.h"
+#include "NtpSyncActivity.h"
+#include "OpdsServerListActivity.h"
 #include "OtaUpdateActivity.h"
+#include "SetTimeActivity.h"
+#include "SetTimezoneOffsetActivity.h"
 #include "SettingsList.h"
 #include "StatusBarSettingsActivity.h"
 #include "activities/network/WifiSelectionActivity.h"
@@ -18,13 +25,15 @@
 #include "fontIds.h"
 
 const StrId SettingsActivity::categoryNames[categoryCount] = {StrId::STR_CAT_DISPLAY, StrId::STR_CAT_READER,
-                                                              StrId::STR_CAT_CONTROLS, StrId::STR_CAT_SYSTEM};
+                                                              StrId::STR_CAT_CONTROLS, StrId::STR_CAT_SYSTEM,
+                                                              StrId::STR_CAT_CLOCK};
 
 void SettingsActivity::onEnter() {
   Activity::onEnter();
 
   // Build per-category vectors from the shared settings list
   displaySettings.clear();
+  clockSettings.clear();
   readerSettings.clear();
   controlsSettings.clear();
   systemSettings.clear();
@@ -33,6 +42,8 @@ void SettingsActivity::onEnter() {
     if (setting.category == StrId::STR_NONE_OPT) continue;
     if (setting.category == StrId::STR_CAT_DISPLAY) {
       displaySettings.push_back(setting);
+    } else if (setting.category == StrId::STR_CAT_CLOCK) {
+      clockSettings.push_back(setting);
     } else if (setting.category == StrId::STR_CAT_READER) {
       readerSettings.push_back(setting);
     } else if (setting.category == StrId::STR_CAT_CONTROLS) {
@@ -40,10 +51,10 @@ void SettingsActivity::onEnter() {
     } else if (setting.category == StrId::STR_CAT_SYSTEM) {
       systemSettings.push_back(setting);
     }
-    // Web-only categories (KOReader Sync, OPDS Browser) are skipped for device UI
   }
 
   // Append device-only ACTION items
+  rebuildClockActions();
   controlsSettings.insert(controlsSettings.begin(),
                           SettingInfo::Action(StrId::STR_REMAP_FRONT_BUTTONS, SettingAction::RemapFrontButtons));
   systemSettings.push_back(SettingInfo::Action(StrId::STR_WIFI_NETWORKS, SettingAction::Network));
@@ -132,6 +143,9 @@ void SettingsActivity::loop() {
       case 3:
         currentSettings = &systemSettings;
         break;
+      case 4:
+        currentSettings = &clockSettings;
+        break;
     }
     settingsCount = static_cast<int>(currentSettings->size());
   }
@@ -173,7 +187,7 @@ void SettingsActivity::toggleCurrentSetting() {
         startActivityForResult(std::make_unique<KOReaderSettingsActivity>(renderer, mappedInput), resultHandler);
         break;
       case SettingAction::OPDSBrowser:
-        startActivityForResult(std::make_unique<CalibreSettingsActivity>(renderer, mappedInput), resultHandler);
+        startActivityForResult(std::make_unique<OpdsServerListActivity>(renderer, mappedInput, false), resultHandler);
         break;
       case SettingAction::Network:
         startActivityForResult(std::make_unique<WifiSelectionActivity>(renderer, mappedInput, false), resultHandler);
@@ -187,16 +201,51 @@ void SettingsActivity::toggleCurrentSetting() {
       case SettingAction::Language:
         startActivityForResult(std::make_unique<LanguageSelectActivity>(renderer, mappedInput), resultHandler);
         break;
+      case SettingAction::SetTime:
+        startActivityForResult(std::make_unique<SetTimeActivity>(renderer, mappedInput), resultHandler);
+        break;
+      case SettingAction::SetTimezoneOffset:
+        startActivityForResult(std::make_unique<SetTimezoneOffsetActivity>(renderer, mappedInput), resultHandler);
+        break;
+      case SettingAction::SyncClock:
+        startActivityForResult(std::make_unique<NtpSyncActivity>(renderer, mappedInput), resultHandler);
+        break;
       case SettingAction::None:
-        // Do nothing
         break;
     }
-    return;  // Results will be handled in the result handler, so we can return early here
+    return;
+  } else if (setting.type == SettingType::ENUM && setting.valueGetter && setting.valueSetter) {
+    const uint8_t currentValue = setting.valueGetter();
+    setting.valueSetter((currentValue + 1) % static_cast<uint8_t>(setting.enumValues.size()));
   } else {
     return;
   }
 
   SETTINGS.saveToFile();
+
+  setenv("TZ", SETTINGS.getTimezonePosixStr(), 1);
+  tzset();
+  rebuildClockActions();
+}
+
+void SettingsActivity::rebuildClockActions() {
+  clockSettings.erase(std::remove_if(clockSettings.begin(), clockSettings.end(),
+                                     [](const SettingInfo& s) { return s.type == SettingType::ACTION; }),
+                      clockSettings.end());
+
+  clockSettings.push_back(SettingInfo::Action(StrId::STR_SYNC_CLOCK, SettingAction::SyncClock));
+  clockSettings.push_back(SettingInfo::Action(StrId::STR_SET_TIME, SettingAction::SetTime));
+
+  if (SETTINGS.timezone == CrossPointSettings::TZ_CUSTOM) {
+    clockSettings.push_back(SettingInfo::Action(StrId::STR_SET_UTC_OFFSET, SettingAction::SetTimezoneOffset));
+  }
+
+  if (currentSettings == &clockSettings) {
+    settingsCount = static_cast<int>(clockSettings.size());
+    if (selectedSettingIndex > settingsCount) {
+      selectedSettingIndex = settingsCount;
+    }
+  }
 }
 
 void SettingsActivity::render(RenderLock&&) {
@@ -235,6 +284,11 @@ void SettingsActivity::render(RenderLock&&) {
         } else if (setting.type == SettingType::ENUM && setting.valuePtr != nullptr) {
           const uint8_t value = SETTINGS.*(setting.valuePtr);
           valueText = I18N.get(setting.enumValues[value]);
+        } else if (setting.type == SettingType::ENUM && setting.valueGetter) {
+          const uint8_t value = setting.valueGetter();
+          if (value < setting.enumValues.size()) {
+            valueText = I18N.get(setting.enumValues[value]);
+          }
         } else if (setting.type == SettingType::VALUE && setting.valuePtr != nullptr) {
           valueText = std::to_string(SETTINGS.*(setting.valuePtr));
         }

src/activities/settings/SettingsActivity.h

@@ -21,6 +21,9 @@ enum class SettingAction {
   ClearCache,
   CheckForUpdates,
   Language,
+  SetTime,
+  SetTimezoneOffset,
+  SyncClock,
 };
 
 struct SettingInfo {
@@ -148,16 +151,18 @@ class SettingsActivity final : public Activity {
 
   // Per-category settings derived from shared list + device-only actions
   std::vector<SettingInfo> displaySettings;
+  std::vector<SettingInfo> clockSettings;
   std::vector<SettingInfo> readerSettings;
   std::vector<SettingInfo> controlsSettings;
   std::vector<SettingInfo> systemSettings;
   const std::vector<SettingInfo>* currentSettings = nullptr;
 
-  static constexpr int categoryCount = 4;
+  static constexpr int categoryCount = 5;
   static const StrId categoryNames[categoryCount];
 
   void enterCategory(int categoryIndex);
   void toggleCurrentSetting();
+  void rebuildClockActions();
 
  public:
   explicit SettingsActivity(GfxRenderer& renderer, MappedInputManager& mappedInput)

src/components/UITheme.h

@@ -30,5 +30,10 @@ class UITheme {
   std::unique_ptr<BaseTheme> currentTheme;
 };
 
+// Known theme thumbnail heights to prerender when opening a book for the first time.
+// Correspond to homeCoverHeight values across all themes (Lyra=226, Base=400).
+static constexpr int PRERENDER_THUMB_HEIGHTS[] = {226, 400};
+static constexpr int PRERENDER_THUMB_HEIGHTS_COUNT = 2;
+
 // Helper macro to access current theme
 #define GUI UITheme::getInstance().getTheme()