Add cover image display in *Continue Reading* card with framebuffer caching (#200)
## Summary * **What is the goal of this PR?** (e.g., Fixes a bug in the user authentication module, Display the book cover image in the **"Continue Reading"** card on the home screen, with fast navigation using framebuffer caching. * **What changes are included?** - Display book cover image in the "Continue Reading" card on home screen - Load cover from cached BMP (same as sleep screen cover) - Add framebuffer store/restore functions (`copyStoredBwBuffer`, `freeStoredBwBuffer`) for fast navigation after initial render - Fix `drawBitmap` scaling bug: apply scale to offset only, not to base coordinates - Add white text boxes behind title/author/continue reading label for readability on cover - Support both EPUB and XTC file cover images - Increase HomeActivity task stack size from 2048 to 4096 for cover image rendering ## Additional Context * Add any other information that might be helpful for the reviewer (e.g., performance implications, potential risks, specific areas to focus on). - Performance: First render loads cover from SD card (~800ms), subsequent navigation uses cached framebuffer (~instant) - Memory: Framebuffer cache uses ~48KB (6 chunks × 8KB) while on home screen, freed on exit - Fallback: If cover image is not available, falls back to standard text-only display - The `drawBitmap` fix corrects a bug where screenY = (y + offset) scale was incorrectly scaling the base coordinates. Now correctly uses screenY = y + (offset scale)
This commit is contained in:
Eunchurn Park
@@ -409,6 +409,70 @@ bool Epub::generateCoverBmp(bool cropped) const {
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return false;
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}
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std::string Epub::getThumbBmpPath() const { return cachePath + "/thumb.bmp"; }
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bool Epub::generateThumbBmp() const {
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// Already generated, return true
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if (SdMan.exists(getThumbBmpPath().c_str())) {
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return true;
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}
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if (!bookMetadataCache || !bookMetadataCache->isLoaded()) {
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Serial.printf("[%lu] [EBP] Cannot generate thumb BMP, cache not loaded\n", millis());
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return false;
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}
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const auto coverImageHref = bookMetadataCache->coreMetadata.coverItemHref;
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if (coverImageHref.empty()) {
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Serial.printf("[%lu] [EBP] No known cover image for thumbnail\n", millis());
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return false;
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}
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if (coverImageHref.substr(coverImageHref.length() - 4) == ".jpg" ||
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coverImageHref.substr(coverImageHref.length() - 5) == ".jpeg") {
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Serial.printf("[%lu] [EBP] Generating thumb BMP from JPG cover image\n", millis());
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const auto coverJpgTempPath = getCachePath() + "/.cover.jpg";
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FsFile coverJpg;
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if (!SdMan.openFileForWrite("EBP", coverJpgTempPath, coverJpg)) {
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return false;
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}
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readItemContentsToStream(coverImageHref, coverJpg, 1024);
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coverJpg.close();
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if (!SdMan.openFileForRead("EBP", coverJpgTempPath, coverJpg)) {
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return false;
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}
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FsFile thumbBmp;
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if (!SdMan.openFileForWrite("EBP", getThumbBmpPath(), thumbBmp)) {
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coverJpg.close();
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return false;
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}
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// Use smaller target size for Continue Reading card (half of screen: 240x400)
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// Generate 1-bit BMP for fast home screen rendering (no gray passes needed)
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constexpr int THUMB_TARGET_WIDTH = 240;
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constexpr int THUMB_TARGET_HEIGHT = 400;
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const bool success = JpegToBmpConverter::jpegFileTo1BitBmpStreamWithSize(coverJpg, thumbBmp, THUMB_TARGET_WIDTH,
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THUMB_TARGET_HEIGHT);
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coverJpg.close();
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thumbBmp.close();
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SdMan.remove(coverJpgTempPath.c_str());
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if (!success) {
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Serial.printf("[%lu] [EBP] Failed to generate thumb BMP from JPG cover image\n", millis());
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SdMan.remove(getThumbBmpPath().c_str());
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}
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Serial.printf("[%lu] [EBP] Generated thumb BMP from JPG cover image, success: %s\n", millis(),
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success ? "yes" : "no");
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return success;
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} else {
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Serial.printf("[%lu] [EBP] Cover image is not a JPG, skipping thumbnail\n", millis());
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}
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return false;
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}
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uint8_t* Epub::readItemContentsToBytes(const std::string& itemHref, size_t* size, const bool trailingNullByte) const {
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if (itemHref.empty()) {
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Serial.printf("[%lu] [EBP] Failed to read item, empty href\n", millis());
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@@ -46,6 +46,8 @@ class Epub {
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const std::string& getAuthor() const;
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std::string getCoverBmpPath(bool cropped = false) const;
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bool generateCoverBmp(bool cropped = false) const;
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std::string getThumbBmpPath() const;
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bool generateThumbBmp() const;
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uint8_t* readItemContentsToBytes(const std::string& itemHref, size_t* size = nullptr,
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bool trailingNullByte = false) const;
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bool readItemContentsToStream(const std::string& itemHref, Print& out, size_t chunkSize) const;
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@@ -228,7 +228,10 @@ BmpReaderError Bitmap::readNextRow(uint8_t* data, uint8_t* rowBuffer) const {
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}
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case 1: {
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for (int x = 0; x < width; x++) {
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lum = (rowBuffer[x >> 3] & (0x80 >> (x & 7))) ? 0xFF : 0x00;
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// Get palette index (0 or 1) from bit at position x
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const uint8_t palIndex = (rowBuffer[x >> 3] & (0x80 >> (x & 7))) ? 1 : 0;
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// Use palette lookup for proper black/white mapping
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lum = paletteLum[palIndex];
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packPixel(lum);
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}
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break;
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@@ -42,6 +42,8 @@ class Bitmap {
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bool isTopDown() const { return topDown; }
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bool hasGreyscale() const { return bpp > 1; }
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int getRowBytes() const { return rowBytes; }
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bool is1Bit() const { return bpp == 1; }
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uint16_t getBpp() const { return bpp; }
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private:
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static uint16_t readLE16(FsFile& f);
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@@ -88,3 +88,19 @@ uint8_t quantize(int gray, int x, int y) {
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return quantizeSimple(gray);
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}
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}
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// 1-bit noise dithering for fast home screen rendering
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// Uses hash-based noise for consistent dithering that works well at small sizes
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uint8_t quantize1bit(int gray, int x, int y) {
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gray = adjustPixel(gray);
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// Generate noise threshold using integer hash (no regular pattern to alias)
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uint32_t hash = static_cast<uint32_t>(x) * 374761393u + static_cast<uint32_t>(y) * 668265263u;
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hash = (hash ^ (hash >> 13)) * 1274126177u;
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const int threshold = static_cast<int>(hash >> 24); // 0-255
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// Simple threshold with noise: gray >= (128 + noise offset) -> white
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// The noise adds variation around the 128 midpoint
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const int adjustedThreshold = 128 + ((threshold - 128) / 2); // Range: 64-192
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return (gray >= adjustedThreshold) ? 1 : 0;
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}
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@@ -5,8 +5,89 @@
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// Helper functions
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uint8_t quantize(int gray, int x, int y);
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uint8_t quantizeSimple(int gray);
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uint8_t quantize1bit(int gray, int x, int y);
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int adjustPixel(int gray);
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// 1-bit Atkinson dithering - better quality than noise dithering for thumbnails
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// Error distribution pattern (same as 2-bit but quantizes to 2 levels):
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// X 1/8 1/8
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// 1/8 1/8 1/8
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// 1/8
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class Atkinson1BitDitherer {
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public:
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explicit Atkinson1BitDitherer(int width) : width(width) {
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errorRow0 = new int16_t[width + 4](); // Current row
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errorRow1 = new int16_t[width + 4](); // Next row
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errorRow2 = new int16_t[width + 4](); // Row after next
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}
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~Atkinson1BitDitherer() {
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delete[] errorRow0;
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delete[] errorRow1;
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delete[] errorRow2;
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}
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// EXPLICITLY DELETE THE COPY CONSTRUCTOR
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Atkinson1BitDitherer(const Atkinson1BitDitherer& other) = delete;
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// EXPLICITLY DELETE THE COPY ASSIGNMENT OPERATOR
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Atkinson1BitDitherer& operator=(const Atkinson1BitDitherer& other) = delete;
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uint8_t processPixel(int gray, int x) {
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// Apply brightness/contrast/gamma adjustments
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gray = adjustPixel(gray);
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// Add accumulated error
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int adjusted = gray + errorRow0[x + 2];
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if (adjusted < 0) adjusted = 0;
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if (adjusted > 255) adjusted = 255;
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// Quantize to 2 levels (1-bit): 0 = black, 1 = white
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uint8_t quantized;
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int quantizedValue;
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if (adjusted < 128) {
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quantized = 0;
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quantizedValue = 0;
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} else {
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quantized = 1;
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quantizedValue = 255;
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}
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// Calculate error (only distribute 6/8 = 75%)
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int error = (adjusted - quantizedValue) >> 3; // error/8
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// Distribute 1/8 to each of 6 neighbors
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errorRow0[x + 3] += error; // Right
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errorRow0[x + 4] += error; // Right+1
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errorRow1[x + 1] += error; // Bottom-left
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errorRow1[x + 2] += error; // Bottom
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errorRow1[x + 3] += error; // Bottom-right
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errorRow2[x + 2] += error; // Two rows down
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return quantized;
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}
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void nextRow() {
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int16_t* temp = errorRow0;
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errorRow0 = errorRow1;
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errorRow1 = errorRow2;
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errorRow2 = temp;
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memset(errorRow2, 0, (width + 4) * sizeof(int16_t));
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}
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void reset() {
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memset(errorRow0, 0, (width + 4) * sizeof(int16_t));
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memset(errorRow1, 0, (width + 4) * sizeof(int16_t));
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memset(errorRow2, 0, (width + 4) * sizeof(int16_t));
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}
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private:
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int width;
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int16_t* errorRow0;
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int16_t* errorRow1;
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int16_t* errorRow2;
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};
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// Atkinson dithering - distributes only 6/8 (75%) of error for cleaner results
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// Error distribution pattern:
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// X 1/8 1/8
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@@ -154,6 +154,12 @@ void GfxRenderer::drawImage(const uint8_t bitmap[], const int x, const int y, co
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void GfxRenderer::drawBitmap(const Bitmap& bitmap, const int x, const int y, const int maxWidth, const int maxHeight,
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const float cropX, const float cropY) const {
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// For 1-bit bitmaps, use optimized 1-bit rendering path (no crop support for 1-bit)
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if (bitmap.is1Bit() && cropX == 0.0f && cropY == 0.0f) {
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drawBitmap1Bit(bitmap, x, y, maxWidth, maxHeight);
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return;
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}
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float scale = 1.0f;
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bool isScaled = false;
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int cropPixX = std::floor(bitmap.getWidth() * cropX / 2.0f);
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@@ -195,6 +201,9 @@ void GfxRenderer::drawBitmap(const Bitmap& bitmap, const int x, const int y, con
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if (screenY >= getScreenHeight()) {
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break;
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}
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if (screenY < 0) {
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continue;
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}
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if (bitmap.readNextRow(outputRow, rowBytes) != BmpReaderError::Ok) {
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Serial.printf("[%lu] [GFX] Failed to read row %d from bitmap\n", millis(), bmpY);
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@@ -217,6 +226,9 @@ void GfxRenderer::drawBitmap(const Bitmap& bitmap, const int x, const int y, con
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if (screenX >= getScreenWidth()) {
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break;
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}
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if (screenX < 0) {
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continue;
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}
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const uint8_t val = outputRow[bmpX / 4] >> (6 - ((bmpX * 2) % 8)) & 0x3;
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@@ -234,6 +246,143 @@ void GfxRenderer::drawBitmap(const Bitmap& bitmap, const int x, const int y, con
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free(rowBytes);
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}
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void GfxRenderer::drawBitmap1Bit(const Bitmap& bitmap, const int x, const int y, const int maxWidth,
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const int maxHeight) const {
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float scale = 1.0f;
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bool isScaled = false;
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if (maxWidth > 0 && bitmap.getWidth() > maxWidth) {
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scale = static_cast<float>(maxWidth) / static_cast<float>(bitmap.getWidth());
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isScaled = true;
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}
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if (maxHeight > 0 && bitmap.getHeight() > maxHeight) {
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scale = std::min(scale, static_cast<float>(maxHeight) / static_cast<float>(bitmap.getHeight()));
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isScaled = true;
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}
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// For 1-bit BMP, output is still 2-bit packed (for consistency with readNextRow)
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const int outputRowSize = (bitmap.getWidth() + 3) / 4;
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auto* outputRow = static_cast<uint8_t*>(malloc(outputRowSize));
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auto* rowBytes = static_cast<uint8_t*>(malloc(bitmap.getRowBytes()));
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if (!outputRow || !rowBytes) {
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Serial.printf("[%lu] [GFX] !! Failed to allocate 1-bit BMP row buffers\n", millis());
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free(outputRow);
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free(rowBytes);
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return;
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}
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for (int bmpY = 0; bmpY < bitmap.getHeight(); bmpY++) {
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// Read rows sequentially using readNextRow
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if (bitmap.readNextRow(outputRow, rowBytes) != BmpReaderError::Ok) {
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Serial.printf("[%lu] [GFX] Failed to read row %d from 1-bit bitmap\n", millis(), bmpY);
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free(outputRow);
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free(rowBytes);
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return;
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}
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// Calculate screen Y based on whether BMP is top-down or bottom-up
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const int bmpYOffset = bitmap.isTopDown() ? bmpY : bitmap.getHeight() - 1 - bmpY;
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int screenY = y + (isScaled ? static_cast<int>(std::floor(bmpYOffset * scale)) : bmpYOffset);
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if (screenY >= getScreenHeight()) {
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continue; // Continue reading to keep row counter in sync
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}
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if (screenY < 0) {
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continue;
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}
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for (int bmpX = 0; bmpX < bitmap.getWidth(); bmpX++) {
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int screenX = x + (isScaled ? static_cast<int>(std::floor(bmpX * scale)) : bmpX);
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if (screenX >= getScreenWidth()) {
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break;
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}
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if (screenX < 0) {
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continue;
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}
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// Get 2-bit value (result of readNextRow quantization)
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const uint8_t val = outputRow[bmpX / 4] >> (6 - ((bmpX * 2) % 8)) & 0x3;
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// For 1-bit source: 0 or 1 -> map to black (0,1,2) or white (3)
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// val < 3 means black pixel (draw it)
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if (val < 3) {
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drawPixel(screenX, screenY, true);
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}
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// White pixels (val == 3) are not drawn (leave background)
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}
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}
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free(outputRow);
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free(rowBytes);
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}
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void GfxRenderer::fillPolygon(const int* xPoints, const int* yPoints, int numPoints, bool state) const {
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if (numPoints < 3) return;
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// Find bounding box
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int minY = yPoints[0], maxY = yPoints[0];
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for (int i = 1; i < numPoints; i++) {
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if (yPoints[i] < minY) minY = yPoints[i];
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if (yPoints[i] > maxY) maxY = yPoints[i];
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}
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// Clip to screen
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if (minY < 0) minY = 0;
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if (maxY >= getScreenHeight()) maxY = getScreenHeight() - 1;
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// Allocate node buffer for scanline algorithm
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auto* nodeX = static_cast<int*>(malloc(numPoints * sizeof(int)));
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if (!nodeX) {
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Serial.printf("[%lu] [GFX] !! Failed to allocate polygon node buffer\n", millis());
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return;
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}
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// Scanline fill algorithm
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for (int scanY = minY; scanY <= maxY; scanY++) {
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int nodes = 0;
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// Find all intersection points with edges
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int j = numPoints - 1;
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for (int i = 0; i < numPoints; i++) {
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if ((yPoints[i] < scanY && yPoints[j] >= scanY) || (yPoints[j] < scanY && yPoints[i] >= scanY)) {
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// Calculate X intersection using fixed-point to avoid float
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int dy = yPoints[j] - yPoints[i];
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if (dy != 0) {
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nodeX[nodes++] = xPoints[i] + (scanY - yPoints[i]) * (xPoints[j] - xPoints[i]) / dy;
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}
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}
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j = i;
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}
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// Sort nodes by X (simple bubble sort, numPoints is small)
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for (int i = 0; i < nodes - 1; i++) {
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for (int k = i + 1; k < nodes; k++) {
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if (nodeX[i] > nodeX[k]) {
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int temp = nodeX[i];
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nodeX[i] = nodeX[k];
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nodeX[k] = temp;
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}
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}
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}
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// Fill between pairs of nodes
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for (int i = 0; i < nodes - 1; i += 2) {
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int startX = nodeX[i];
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int endX = nodeX[i + 1];
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// Clip to screen
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if (startX < 0) startX = 0;
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if (endX >= getScreenWidth()) endX = getScreenWidth() - 1;
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// Draw horizontal line
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for (int x = startX; x <= endX; x++) {
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drawPixel(x, scanY, state);
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}
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}
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}
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free(nodeX);
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}
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void GfxRenderer::clearScreen(const uint8_t color) const { einkDisplay.clearScreen(color); }
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void GfxRenderer::invertScreen() const {
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@@ -68,6 +68,8 @@ class GfxRenderer {
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void drawImage(const uint8_t bitmap[], int x, int y, int width, int height) const;
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void drawBitmap(const Bitmap& bitmap, int x, int y, int maxWidth, int maxHeight, float cropX = 0,
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float cropY = 0) const;
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void drawBitmap1Bit(const Bitmap& bitmap, int x, int y, int maxWidth, int maxHeight) const;
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void fillPolygon(const int* xPoints, const int* yPoints, int numPoints, bool state = true) const;
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// Text
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int getTextWidth(int fontId, const char* text, EpdFontFamily::Style style = EpdFontFamily::REGULAR) const;
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@@ -97,8 +99,8 @@ class GfxRenderer {
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void copyGrayscaleLsbBuffers() const;
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void copyGrayscaleMsbBuffers() const;
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void displayGrayBuffer() const;
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bool storeBwBuffer(); // Returns true if buffer was stored successfully
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void restoreBwBuffer();
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bool storeBwBuffer(); // Returns true if buffer was stored successfully
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void restoreBwBuffer(); // Restore and free the stored buffer
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void cleanupGrayscaleWithFrameBuffer() const;
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||||
|
||||
// Low level functions
|
||||
|
||||
@@ -87,8 +87,47 @@ void writeBmpHeader8bit(Print& bmpOut, const int width, const int height) {
|
||||
}
|
||||
}
|
||||
|
||||
// Helper function: Write BMP header with 1-bit color depth (black and white)
|
||||
static void writeBmpHeader1bit(Print& bmpOut, const int width, const int height) {
|
||||
// Calculate row padding (each row must be multiple of 4 bytes)
|
||||
const int bytesPerRow = (width + 31) / 32 * 4; // 1 bit per pixel, round up to 4-byte boundary
|
||||
const int imageSize = bytesPerRow * height;
|
||||
const uint32_t fileSize = 62 + imageSize; // 14 (file header) + 40 (DIB header) + 8 (palette) + image
|
||||
|
||||
// BMP File Header (14 bytes)
|
||||
bmpOut.write('B');
|
||||
bmpOut.write('M');
|
||||
write32(bmpOut, fileSize); // File size
|
||||
write32(bmpOut, 0); // Reserved
|
||||
write32(bmpOut, 62); // Offset to pixel data (14 + 40 + 8)
|
||||
|
||||
// DIB Header (BITMAPINFOHEADER - 40 bytes)
|
||||
write32(bmpOut, 40);
|
||||
write32Signed(bmpOut, width);
|
||||
write32Signed(bmpOut, -height); // Negative height = top-down bitmap
|
||||
write16(bmpOut, 1); // Color planes
|
||||
write16(bmpOut, 1); // Bits per pixel (1 bit)
|
||||
write32(bmpOut, 0); // BI_RGB (no compression)
|
||||
write32(bmpOut, imageSize);
|
||||
write32(bmpOut, 2835); // xPixelsPerMeter (72 DPI)
|
||||
write32(bmpOut, 2835); // yPixelsPerMeter (72 DPI)
|
||||
write32(bmpOut, 2); // colorsUsed
|
||||
write32(bmpOut, 2); // colorsImportant
|
||||
|
||||
// Color Palette (2 colors x 4 bytes = 8 bytes)
|
||||
// Format: Blue, Green, Red, Reserved (BGRA)
|
||||
// Note: In 1-bit BMP, palette index 0 = black, 1 = white
|
||||
uint8_t palette[8] = {
|
||||
0x00, 0x00, 0x00, 0x00, // Color 0: Black
|
||||
0xFF, 0xFF, 0xFF, 0x00 // Color 1: White
|
||||
};
|
||||
for (const uint8_t i : palette) {
|
||||
bmpOut.write(i);
|
||||
}
|
||||
}
|
||||
|
||||
// Helper function: Write BMP header with 2-bit color depth
|
||||
void JpegToBmpConverter::writeBmpHeader(Print& bmpOut, const int width, const int height) {
|
||||
static void writeBmpHeader2bit(Print& bmpOut, const int width, const int height) {
|
||||
// Calculate row padding (each row must be multiple of 4 bytes)
|
||||
const int bytesPerRow = (width * 2 + 31) / 32 * 4; // 2 bits per pixel, round up
|
||||
const int imageSize = bytesPerRow * height;
|
||||
@@ -159,9 +198,11 @@ unsigned char JpegToBmpConverter::jpegReadCallback(unsigned char* pBuf, const un
|
||||
return 0; // Success
|
||||
}
|
||||
|
||||
// Core function: Convert JPEG file to 2-bit BMP
|
||||
bool JpegToBmpConverter::jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut) {
|
||||
Serial.printf("[%lu] [JPG] Converting JPEG to BMP\n", millis());
|
||||
// Internal implementation with configurable target size and bit depth
|
||||
bool JpegToBmpConverter::jpegFileToBmpStreamInternal(FsFile& jpegFile, Print& bmpOut, int targetWidth, int targetHeight,
|
||||
bool oneBit) {
|
||||
Serial.printf("[%lu] [JPG] Converting JPEG to %s BMP (target: %dx%d)\n", millis(), oneBit ? "1-bit" : "2-bit",
|
||||
targetWidth, targetHeight);
|
||||
|
||||
// Setup context for picojpeg callback
|
||||
JpegReadContext context = {.file = jpegFile, .bufferPos = 0, .bufferFilled = 0};
|
||||
@@ -196,10 +237,10 @@ bool JpegToBmpConverter::jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut) {
|
||||
uint32_t scaleY_fp = 65536;
|
||||
bool needsScaling = false;
|
||||
|
||||
if (USE_PRESCALE && (imageInfo.m_width > TARGET_MAX_WIDTH || imageInfo.m_height > TARGET_MAX_HEIGHT)) {
|
||||
if (targetWidth > 0 && targetHeight > 0 && (imageInfo.m_width > targetWidth || imageInfo.m_height > targetHeight)) {
|
||||
// Calculate scale to fit within target dimensions while maintaining aspect ratio
|
||||
const float scaleToFitWidth = static_cast<float>(TARGET_MAX_WIDTH) / imageInfo.m_width;
|
||||
const float scaleToFitHeight = static_cast<float>(TARGET_MAX_HEIGHT) / imageInfo.m_height;
|
||||
const float scaleToFitWidth = static_cast<float>(targetWidth) / imageInfo.m_width;
|
||||
const float scaleToFitHeight = static_cast<float>(targetHeight) / imageInfo.m_height;
|
||||
// We scale to the smaller dimension, so we can potentially crop later.
|
||||
// TODO: ideally, we already crop here.
|
||||
const float scale = (scaleToFitWidth > scaleToFitHeight) ? scaleToFitWidth : scaleToFitHeight;
|
||||
@@ -218,16 +259,19 @@ bool JpegToBmpConverter::jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut) {
|
||||
needsScaling = true;
|
||||
|
||||
Serial.printf("[%lu] [JPG] Pre-scaling %dx%d -> %dx%d (fit to %dx%d)\n", millis(), imageInfo.m_width,
|
||||
imageInfo.m_height, outWidth, outHeight, TARGET_MAX_WIDTH, TARGET_MAX_HEIGHT);
|
||||
imageInfo.m_height, outWidth, outHeight, targetWidth, targetHeight);
|
||||
}
|
||||
|
||||
// Write BMP header with output dimensions
|
||||
int bytesPerRow;
|
||||
if (USE_8BIT_OUTPUT) {
|
||||
if (USE_8BIT_OUTPUT && !oneBit) {
|
||||
writeBmpHeader8bit(bmpOut, outWidth, outHeight);
|
||||
bytesPerRow = (outWidth + 3) / 4 * 4;
|
||||
} else if (oneBit) {
|
||||
writeBmpHeader1bit(bmpOut, outWidth, outHeight);
|
||||
bytesPerRow = (outWidth + 31) / 32 * 4; // 1 bit per pixel
|
||||
} else {
|
||||
writeBmpHeader(bmpOut, outWidth, outHeight);
|
||||
writeBmpHeader2bit(bmpOut, outWidth, outHeight);
|
||||
bytesPerRow = (outWidth * 2 + 31) / 32 * 4;
|
||||
}
|
||||
|
||||
@@ -258,11 +302,16 @@ bool JpegToBmpConverter::jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Create ditherer if enabled (only for 2-bit output)
|
||||
// Create ditherer if enabled
|
||||
// Use OUTPUT dimensions for dithering (after prescaling)
|
||||
AtkinsonDitherer* atkinsonDitherer = nullptr;
|
||||
FloydSteinbergDitherer* fsDitherer = nullptr;
|
||||
if (!USE_8BIT_OUTPUT) {
|
||||
Atkinson1BitDitherer* atkinson1BitDitherer = nullptr;
|
||||
|
||||
if (oneBit) {
|
||||
// For 1-bit output, use Atkinson dithering for better quality
|
||||
atkinson1BitDitherer = new Atkinson1BitDitherer(outWidth);
|
||||
} else if (!USE_8BIT_OUTPUT) {
|
||||
if (USE_ATKINSON) {
|
||||
atkinsonDitherer = new AtkinsonDitherer(outWidth);
|
||||
} else if (USE_FLOYD_STEINBERG) {
|
||||
@@ -348,12 +397,25 @@ bool JpegToBmpConverter::jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut) {
|
||||
// No scaling - direct output (1:1 mapping)
|
||||
memset(rowBuffer, 0, bytesPerRow);
|
||||
|
||||
if (USE_8BIT_OUTPUT) {
|
||||
if (USE_8BIT_OUTPUT && !oneBit) {
|
||||
for (int x = 0; x < outWidth; x++) {
|
||||
const uint8_t gray = mcuRowBuffer[bufferY * imageInfo.m_width + x];
|
||||
rowBuffer[x] = adjustPixel(gray);
|
||||
}
|
||||
} else if (oneBit) {
|
||||
// 1-bit output with Atkinson dithering for better quality
|
||||
for (int x = 0; x < outWidth; x++) {
|
||||
const uint8_t gray = mcuRowBuffer[bufferY * imageInfo.m_width + x];
|
||||
const uint8_t bit =
|
||||
atkinson1BitDitherer ? atkinson1BitDitherer->processPixel(gray, x) : quantize1bit(gray, x, y);
|
||||
// Pack 1-bit value: MSB first, 8 pixels per byte
|
||||
const int byteIndex = x / 8;
|
||||
const int bitOffset = 7 - (x % 8);
|
||||
rowBuffer[byteIndex] |= (bit << bitOffset);
|
||||
}
|
||||
if (atkinson1BitDitherer) atkinson1BitDitherer->nextRow();
|
||||
} else {
|
||||
// 2-bit output
|
||||
for (int x = 0; x < outWidth; x++) {
|
||||
const uint8_t gray = adjustPixel(mcuRowBuffer[bufferY * imageInfo.m_width + x]);
|
||||
uint8_t twoBit;
|
||||
@@ -411,12 +473,25 @@ bool JpegToBmpConverter::jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut) {
|
||||
if (srcY_fp >= nextOutY_srcStart && currentOutY < outHeight) {
|
||||
memset(rowBuffer, 0, bytesPerRow);
|
||||
|
||||
if (USE_8BIT_OUTPUT) {
|
||||
if (USE_8BIT_OUTPUT && !oneBit) {
|
||||
for (int x = 0; x < outWidth; x++) {
|
||||
const uint8_t gray = (rowCount[x] > 0) ? (rowAccum[x] / rowCount[x]) : 0;
|
||||
rowBuffer[x] = adjustPixel(gray);
|
||||
}
|
||||
} else if (oneBit) {
|
||||
// 1-bit output with Atkinson dithering for better quality
|
||||
for (int x = 0; x < outWidth; x++) {
|
||||
const uint8_t gray = (rowCount[x] > 0) ? (rowAccum[x] / rowCount[x]) : 0;
|
||||
const uint8_t bit = atkinson1BitDitherer ? atkinson1BitDitherer->processPixel(gray, x)
|
||||
: quantize1bit(gray, x, currentOutY);
|
||||
// Pack 1-bit value: MSB first, 8 pixels per byte
|
||||
const int byteIndex = x / 8;
|
||||
const int bitOffset = 7 - (x % 8);
|
||||
rowBuffer[byteIndex] |= (bit << bitOffset);
|
||||
}
|
||||
if (atkinson1BitDitherer) atkinson1BitDitherer->nextRow();
|
||||
} else {
|
||||
// 2-bit output
|
||||
for (int x = 0; x < outWidth; x++) {
|
||||
const uint8_t gray = adjustPixel((rowCount[x] > 0) ? (rowAccum[x] / rowCount[x]) : 0);
|
||||
uint8_t twoBit;
|
||||
@@ -464,9 +539,29 @@ bool JpegToBmpConverter::jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut) {
|
||||
if (fsDitherer) {
|
||||
delete fsDitherer;
|
||||
}
|
||||
if (atkinson1BitDitherer) {
|
||||
delete atkinson1BitDitherer;
|
||||
}
|
||||
free(mcuRowBuffer);
|
||||
free(rowBuffer);
|
||||
|
||||
Serial.printf("[%lu] [JPG] Successfully converted JPEG to BMP\n", millis());
|
||||
return true;
|
||||
}
|
||||
|
||||
// Core function: Convert JPEG file to 2-bit BMP (uses default target size)
|
||||
bool JpegToBmpConverter::jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut) {
|
||||
return jpegFileToBmpStreamInternal(jpegFile, bmpOut, TARGET_MAX_WIDTH, TARGET_MAX_HEIGHT, false);
|
||||
}
|
||||
|
||||
// Convert with custom target size (for thumbnails, 2-bit)
|
||||
bool JpegToBmpConverter::jpegFileToBmpStreamWithSize(FsFile& jpegFile, Print& bmpOut, int targetMaxWidth,
|
||||
int targetMaxHeight) {
|
||||
return jpegFileToBmpStreamInternal(jpegFile, bmpOut, targetMaxWidth, targetMaxHeight, false);
|
||||
}
|
||||
|
||||
// Convert to 1-bit BMP (black and white only, no grays) for fast home screen rendering
|
||||
bool JpegToBmpConverter::jpegFileTo1BitBmpStreamWithSize(FsFile& jpegFile, Print& bmpOut, int targetMaxWidth,
|
||||
int targetMaxHeight) {
|
||||
return jpegFileToBmpStreamInternal(jpegFile, bmpOut, targetMaxWidth, targetMaxHeight, true);
|
||||
}
|
||||
|
||||
@@ -5,11 +5,15 @@ class Print;
|
||||
class ZipFile;
|
||||
|
||||
class JpegToBmpConverter {
|
||||
static void writeBmpHeader(Print& bmpOut, int width, int height);
|
||||
// [COMMENTED OUT] static uint8_t grayscaleTo2Bit(uint8_t grayscale, int x, int y);
|
||||
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);
|
||||
};
|
||||
|
||||
261
lib/Xtc/Xtc.cpp
261
lib/Xtc/Xtc.cpp
@@ -293,6 +293,267 @@ bool Xtc::generateCoverBmp() const {
|
||||
return true;
|
||||
}
|
||||
|
||||
std::string Xtc::getThumbBmpPath() const { return cachePath + "/thumb.bmp"; }
|
||||
|
||||
bool Xtc::generateThumbBmp() const {
|
||||
// Already generated
|
||||
if (SdMan.exists(getThumbBmpPath().c_str())) {
|
||||
return true;
|
||||
}
|
||||
|
||||
if (!loaded || !parser) {
|
||||
Serial.printf("[%lu] [XTC] Cannot generate thumb BMP, file not loaded\n", millis());
|
||||
return false;
|
||||
}
|
||||
|
||||
if (parser->getPageCount() == 0) {
|
||||
Serial.printf("[%lu] [XTC] No pages in XTC file\n", millis());
|
||||
return false;
|
||||
}
|
||||
|
||||
// Setup cache directory
|
||||
setupCacheDir();
|
||||
|
||||
// Get first page info for cover
|
||||
xtc::PageInfo pageInfo;
|
||||
if (!parser->getPageInfo(0, pageInfo)) {
|
||||
Serial.printf("[%lu] [XTC] Failed to get first page info\n", millis());
|
||||
return false;
|
||||
}
|
||||
|
||||
// Get bit depth
|
||||
const uint8_t bitDepth = parser->getBitDepth();
|
||||
|
||||
// Calculate target dimensions for thumbnail (fit within 240x400 Continue Reading card)
|
||||
constexpr int THUMB_TARGET_WIDTH = 240;
|
||||
constexpr int THUMB_TARGET_HEIGHT = 400;
|
||||
|
||||
// Calculate scale factor
|
||||
float scaleX = static_cast<float>(THUMB_TARGET_WIDTH) / pageInfo.width;
|
||||
float scaleY = static_cast<float>(THUMB_TARGET_HEIGHT) / pageInfo.height;
|
||||
float scale = (scaleX < scaleY) ? scaleX : scaleY;
|
||||
|
||||
// Only scale down, never up
|
||||
if (scale >= 1.0f) {
|
||||
// Page is already small enough, just use cover.bmp
|
||||
// Copy cover.bmp to thumb.bmp
|
||||
if (generateCoverBmp()) {
|
||||
FsFile src, dst;
|
||||
if (SdMan.openFileForRead("XTC", getCoverBmpPath(), src)) {
|
||||
if (SdMan.openFileForWrite("XTC", getThumbBmpPath(), dst)) {
|
||||
uint8_t buffer[512];
|
||||
while (src.available()) {
|
||||
size_t bytesRead = src.read(buffer, sizeof(buffer));
|
||||
dst.write(buffer, bytesRead);
|
||||
}
|
||||
dst.close();
|
||||
}
|
||||
src.close();
|
||||
}
|
||||
Serial.printf("[%lu] [XTC] Copied cover to thumb (no scaling needed)\n", millis());
|
||||
return SdMan.exists(getThumbBmpPath().c_str());
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
uint16_t thumbWidth = static_cast<uint16_t>(pageInfo.width * scale);
|
||||
uint16_t thumbHeight = static_cast<uint16_t>(pageInfo.height * scale);
|
||||
|
||||
Serial.printf("[%lu] [XTC] Generating thumb BMP: %dx%d -> %dx%d (scale: %.3f)\n", millis(), pageInfo.width,
|
||||
pageInfo.height, thumbWidth, thumbHeight, scale);
|
||||
|
||||
// Allocate buffer for page data
|
||||
size_t bitmapSize;
|
||||
if (bitDepth == 2) {
|
||||
bitmapSize = ((static_cast<size_t>(pageInfo.width) * pageInfo.height + 7) / 8) * 2;
|
||||
} else {
|
||||
bitmapSize = ((pageInfo.width + 7) / 8) * pageInfo.height;
|
||||
}
|
||||
uint8_t* pageBuffer = static_cast<uint8_t*>(malloc(bitmapSize));
|
||||
if (!pageBuffer) {
|
||||
Serial.printf("[%lu] [XTC] Failed to allocate page buffer (%lu bytes)\n", millis(), bitmapSize);
|
||||
return false;
|
||||
}
|
||||
|
||||
// Load first page (cover)
|
||||
size_t bytesRead = const_cast<xtc::XtcParser*>(parser.get())->loadPage(0, pageBuffer, bitmapSize);
|
||||
if (bytesRead == 0) {
|
||||
Serial.printf("[%lu] [XTC] Failed to load cover page for thumb\n", millis());
|
||||
free(pageBuffer);
|
||||
return false;
|
||||
}
|
||||
|
||||
// Create thumbnail BMP file - use 1-bit format for fast home screen rendering (no gray passes)
|
||||
FsFile thumbBmp;
|
||||
if (!SdMan.openFileForWrite("XTC", getThumbBmpPath(), thumbBmp)) {
|
||||
Serial.printf("[%lu] [XTC] Failed to create thumb BMP file\n", millis());
|
||||
free(pageBuffer);
|
||||
return false;
|
||||
}
|
||||
|
||||
// Write 1-bit BMP header for fast home screen rendering
|
||||
const uint32_t rowSize = (thumbWidth + 31) / 32 * 4; // 1 bit per pixel, aligned to 4 bytes
|
||||
const uint32_t imageSize = rowSize * thumbHeight;
|
||||
const uint32_t fileSize = 14 + 40 + 8 + imageSize; // 8 bytes for 2-color palette
|
||||
|
||||
// File header
|
||||
thumbBmp.write('B');
|
||||
thumbBmp.write('M');
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&fileSize), 4);
|
||||
uint32_t reserved = 0;
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&reserved), 4);
|
||||
uint32_t dataOffset = 14 + 40 + 8; // 1-bit palette has 2 colors (8 bytes)
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&dataOffset), 4);
|
||||
|
||||
// DIB header
|
||||
uint32_t dibHeaderSize = 40;
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&dibHeaderSize), 4);
|
||||
int32_t widthVal = thumbWidth;
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&widthVal), 4);
|
||||
int32_t heightVal = -static_cast<int32_t>(thumbHeight); // Negative for top-down
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&heightVal), 4);
|
||||
uint16_t planes = 1;
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&planes), 2);
|
||||
uint16_t bitsPerPixel = 1; // 1-bit for black and white
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&bitsPerPixel), 2);
|
||||
uint32_t compression = 0;
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&compression), 4);
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&imageSize), 4);
|
||||
int32_t ppmX = 2835;
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&ppmX), 4);
|
||||
int32_t ppmY = 2835;
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&ppmY), 4);
|
||||
uint32_t colorsUsed = 2;
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&colorsUsed), 4);
|
||||
uint32_t colorsImportant = 2;
|
||||
thumbBmp.write(reinterpret_cast<const uint8_t*>(&colorsImportant), 4);
|
||||
|
||||
// Color palette (2 colors for 1-bit: black and white)
|
||||
uint8_t palette[8] = {
|
||||
0x00, 0x00, 0x00, 0x00, // Color 0: Black
|
||||
0xFF, 0xFF, 0xFF, 0x00 // Color 1: White
|
||||
};
|
||||
thumbBmp.write(palette, 8);
|
||||
|
||||
// Allocate row buffer for 1-bit output
|
||||
uint8_t* rowBuffer = static_cast<uint8_t*>(malloc(rowSize));
|
||||
if (!rowBuffer) {
|
||||
free(pageBuffer);
|
||||
thumbBmp.close();
|
||||
return false;
|
||||
}
|
||||
|
||||
// Fixed-point scale factor (16.16)
|
||||
uint32_t scaleInv_fp = static_cast<uint32_t>(65536.0f / scale);
|
||||
|
||||
// Pre-calculate plane info for 2-bit mode
|
||||
const size_t planeSize = (bitDepth == 2) ? ((static_cast<size_t>(pageInfo.width) * pageInfo.height + 7) / 8) : 0;
|
||||
const uint8_t* plane1 = (bitDepth == 2) ? pageBuffer : nullptr;
|
||||
const uint8_t* plane2 = (bitDepth == 2) ? pageBuffer + planeSize : nullptr;
|
||||
const size_t colBytes = (bitDepth == 2) ? ((pageInfo.height + 7) / 8) : 0;
|
||||
const size_t srcRowBytes = (bitDepth == 1) ? ((pageInfo.width + 7) / 8) : 0;
|
||||
|
||||
for (uint16_t dstY = 0; dstY < thumbHeight; dstY++) {
|
||||
memset(rowBuffer, 0xFF, rowSize); // Start with all white (bit 1)
|
||||
|
||||
// Calculate source Y range with bounds checking
|
||||
uint32_t srcYStart = (static_cast<uint32_t>(dstY) * scaleInv_fp) >> 16;
|
||||
uint32_t srcYEnd = (static_cast<uint32_t>(dstY + 1) * scaleInv_fp) >> 16;
|
||||
if (srcYStart >= pageInfo.height) srcYStart = pageInfo.height - 1;
|
||||
if (srcYEnd > pageInfo.height) srcYEnd = pageInfo.height;
|
||||
if (srcYEnd <= srcYStart) srcYEnd = srcYStart + 1;
|
||||
if (srcYEnd > pageInfo.height) srcYEnd = pageInfo.height;
|
||||
|
||||
for (uint16_t dstX = 0; dstX < thumbWidth; dstX++) {
|
||||
// Calculate source X range with bounds checking
|
||||
uint32_t srcXStart = (static_cast<uint32_t>(dstX) * scaleInv_fp) >> 16;
|
||||
uint32_t srcXEnd = (static_cast<uint32_t>(dstX + 1) * scaleInv_fp) >> 16;
|
||||
if (srcXStart >= pageInfo.width) srcXStart = pageInfo.width - 1;
|
||||
if (srcXEnd > pageInfo.width) srcXEnd = pageInfo.width;
|
||||
if (srcXEnd <= srcXStart) srcXEnd = srcXStart + 1;
|
||||
if (srcXEnd > pageInfo.width) srcXEnd = pageInfo.width;
|
||||
|
||||
// Area averaging: sum grayscale values (0-255 range)
|
||||
uint32_t graySum = 0;
|
||||
uint32_t totalCount = 0;
|
||||
|
||||
for (uint32_t srcY = srcYStart; srcY < srcYEnd && srcY < pageInfo.height; srcY++) {
|
||||
for (uint32_t srcX = srcXStart; srcX < srcXEnd && srcX < pageInfo.width; srcX++) {
|
||||
uint8_t grayValue = 255; // Default: white
|
||||
|
||||
if (bitDepth == 2) {
|
||||
// XTH 2-bit mode: pixel value 0-3
|
||||
// Bounds check for column index
|
||||
if (srcX < pageInfo.width) {
|
||||
const size_t colIndex = pageInfo.width - 1 - srcX;
|
||||
const size_t byteInCol = srcY / 8;
|
||||
const size_t bitInByte = 7 - (srcY % 8);
|
||||
const size_t byteOffset = colIndex * colBytes + byteInCol;
|
||||
// Bounds check for buffer access
|
||||
if (byteOffset < planeSize) {
|
||||
const uint8_t bit1 = (plane1[byteOffset] >> bitInByte) & 1;
|
||||
const uint8_t bit2 = (plane2[byteOffset] >> bitInByte) & 1;
|
||||
const uint8_t pixelValue = (bit1 << 1) | bit2;
|
||||
// Convert 2-bit (0-3) to grayscale: 0=black, 3=white
|
||||
// pixelValue: 0=white, 1=light gray, 2=dark gray, 3=black (XTC polarity)
|
||||
grayValue = (3 - pixelValue) * 85; // 0->255, 1->170, 2->85, 3->0
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// 1-bit mode
|
||||
const size_t byteIdx = srcY * srcRowBytes + srcX / 8;
|
||||
const size_t bitIdx = 7 - (srcX % 8);
|
||||
// Bounds check for buffer access
|
||||
if (byteIdx < bitmapSize) {
|
||||
const uint8_t pixelBit = (pageBuffer[byteIdx] >> bitIdx) & 1;
|
||||
// XTC polarity: 1=black, 0=white
|
||||
grayValue = pixelBit ? 0 : 255;
|
||||
}
|
||||
}
|
||||
|
||||
graySum += grayValue;
|
||||
totalCount++;
|
||||
}
|
||||
}
|
||||
|
||||
// Calculate average grayscale and quantize to 1-bit with noise dithering
|
||||
uint8_t avgGray = (totalCount > 0) ? static_cast<uint8_t>(graySum / totalCount) : 255;
|
||||
|
||||
// Hash-based noise dithering for 1-bit output
|
||||
uint32_t hash = static_cast<uint32_t>(dstX) * 374761393u + static_cast<uint32_t>(dstY) * 668265263u;
|
||||
hash = (hash ^ (hash >> 13)) * 1274126177u;
|
||||
const int threshold = static_cast<int>(hash >> 24); // 0-255
|
||||
const int adjustedThreshold = 128 + ((threshold - 128) / 2); // Range: 64-192
|
||||
|
||||
// Quantize to 1-bit: 0=black, 1=white
|
||||
uint8_t oneBit = (avgGray >= adjustedThreshold) ? 1 : 0;
|
||||
|
||||
// Pack 1-bit value into row buffer (MSB first, 8 pixels per byte)
|
||||
const size_t byteIndex = dstX / 8;
|
||||
const size_t bitOffset = 7 - (dstX % 8);
|
||||
// Bounds check for row buffer access
|
||||
if (byteIndex < rowSize) {
|
||||
if (oneBit) {
|
||||
rowBuffer[byteIndex] |= (1 << bitOffset); // Set bit for white
|
||||
} else {
|
||||
rowBuffer[byteIndex] &= ~(1 << bitOffset); // Clear bit for black
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Write row (already padded to 4-byte boundary by rowSize)
|
||||
thumbBmp.write(rowBuffer, rowSize);
|
||||
}
|
||||
|
||||
free(rowBuffer);
|
||||
thumbBmp.close();
|
||||
free(pageBuffer);
|
||||
|
||||
Serial.printf("[%lu] [XTC] Generated thumb BMP (%dx%d): %s\n", millis(), thumbWidth, thumbHeight,
|
||||
getThumbBmpPath().c_str());
|
||||
return true;
|
||||
}
|
||||
|
||||
uint32_t Xtc::getPageCount() const {
|
||||
if (!loaded || !parser) {
|
||||
return 0;
|
||||
|
||||
@@ -62,6 +62,9 @@ class Xtc {
|
||||
// Cover image support (for sleep screen)
|
||||
std::string getCoverBmpPath() const;
|
||||
bool generateCoverBmp() const;
|
||||
// Thumbnail support (for Continue Reading card)
|
||||
std::string getThumbBmpPath() const;
|
||||
bool generateThumbBmp() const;
|
||||
|
||||
// Page access
|
||||
uint32_t getPageCount() const;
|
||||
|
||||
@@ -1,8 +1,10 @@
|
||||
#include "HomeActivity.h"
|
||||
|
||||
#include <Bitmap.h>
|
||||
#include <Epub.h>
|
||||
#include <GfxRenderer.h>
|
||||
#include <SDCardManager.h>
|
||||
#include <Xtc.h>
|
||||
|
||||
#include <cstring>
|
||||
#include <vector>
|
||||
@@ -15,6 +17,29 @@
|
||||
#include "fontIds.h"
|
||||
#include "util/StringUtils.h"
|
||||
|
||||
namespace {
|
||||
// UTF-8 safe string truncation - removes one character from the end
|
||||
// Returns the new size after removing one UTF-8 character
|
||||
size_t utf8RemoveLastChar(std::string& str) {
|
||||
if (str.empty()) return 0;
|
||||
size_t pos = str.size() - 1;
|
||||
// Walk back to find the start of the last UTF-8 character
|
||||
// UTF-8 continuation bytes start with 10xxxxxx (0x80-0xBF)
|
||||
while (pos > 0 && (static_cast<unsigned char>(str[pos]) & 0xC0) == 0x80) {
|
||||
--pos;
|
||||
}
|
||||
str.resize(pos);
|
||||
return pos;
|
||||
}
|
||||
|
||||
// Truncate string by removing N UTF-8 characters from the end
|
||||
void utf8TruncateChars(std::string& str, size_t numChars) {
|
||||
for (size_t i = 0; i < numChars && !str.empty(); ++i) {
|
||||
utf8RemoveLastChar(str);
|
||||
}
|
||||
}
|
||||
} // namespace
|
||||
|
||||
void HomeActivity::taskTrampoline(void* param) {
|
||||
auto* self = static_cast<HomeActivity*>(param);
|
||||
self->displayTaskLoop();
|
||||
@@ -46,7 +71,7 @@ void HomeActivity::onEnter() {
|
||||
lastBookTitle = lastBookTitle.substr(lastSlash + 1);
|
||||
}
|
||||
|
||||
// If epub, try to load the metadata for title/author
|
||||
// If epub, try to load the metadata for title/author and cover
|
||||
if (StringUtils::checkFileExtension(lastBookTitle, ".epub")) {
|
||||
Epub epub(APP_STATE.openEpubPath, "/.crosspoint");
|
||||
epub.load(false);
|
||||
@@ -56,10 +81,31 @@ void HomeActivity::onEnter() {
|
||||
if (!epub.getAuthor().empty()) {
|
||||
lastBookAuthor = std::string(epub.getAuthor());
|
||||
}
|
||||
} else if (StringUtils::checkFileExtension(lastBookTitle, ".xtch")) {
|
||||
lastBookTitle.resize(lastBookTitle.length() - 5);
|
||||
} else if (StringUtils::checkFileExtension(lastBookTitle, ".xtc")) {
|
||||
lastBookTitle.resize(lastBookTitle.length() - 4);
|
||||
// Try to generate thumbnail image for Continue Reading card
|
||||
if (epub.generateThumbBmp()) {
|
||||
coverBmpPath = epub.getThumbBmpPath();
|
||||
hasCoverImage = true;
|
||||
}
|
||||
} else if (StringUtils::checkFileExtension(lastBookTitle, ".xtch") ||
|
||||
StringUtils::checkFileExtension(lastBookTitle, ".xtc")) {
|
||||
// Handle XTC file
|
||||
Xtc xtc(APP_STATE.openEpubPath, "/.crosspoint");
|
||||
if (xtc.load()) {
|
||||
if (!xtc.getTitle().empty()) {
|
||||
lastBookTitle = std::string(xtc.getTitle());
|
||||
}
|
||||
// Try to generate thumbnail image for Continue Reading card
|
||||
if (xtc.generateThumbBmp()) {
|
||||
coverBmpPath = xtc.getThumbBmpPath();
|
||||
hasCoverImage = true;
|
||||
}
|
||||
}
|
||||
// Remove extension from title if we don't have metadata
|
||||
if (StringUtils::checkFileExtension(lastBookTitle, ".xtch")) {
|
||||
lastBookTitle.resize(lastBookTitle.length() - 5);
|
||||
} else if (StringUtils::checkFileExtension(lastBookTitle, ".xtc")) {
|
||||
lastBookTitle.resize(lastBookTitle.length() - 4);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@@ -69,7 +115,7 @@ void HomeActivity::onEnter() {
|
||||
updateRequired = true;
|
||||
|
||||
xTaskCreate(&HomeActivity::taskTrampoline, "HomeActivityTask",
|
||||
4096, // Stack size
|
||||
4096, // Stack size (increased for cover image rendering)
|
||||
this, // Parameters
|
||||
1, // Priority
|
||||
&displayTaskHandle // Task handle
|
||||
@@ -87,6 +133,51 @@ void HomeActivity::onExit() {
|
||||
}
|
||||
vSemaphoreDelete(renderingMutex);
|
||||
renderingMutex = nullptr;
|
||||
|
||||
// Free the stored cover buffer if any
|
||||
freeCoverBuffer();
|
||||
}
|
||||
|
||||
bool HomeActivity::storeCoverBuffer() {
|
||||
uint8_t* frameBuffer = renderer.getFrameBuffer();
|
||||
if (!frameBuffer) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Free any existing buffer first
|
||||
freeCoverBuffer();
|
||||
|
||||
const size_t bufferSize = GfxRenderer::getBufferSize();
|
||||
coverBuffer = static_cast<uint8_t*>(malloc(bufferSize));
|
||||
if (!coverBuffer) {
|
||||
return false;
|
||||
}
|
||||
|
||||
memcpy(coverBuffer, frameBuffer, bufferSize);
|
||||
return true;
|
||||
}
|
||||
|
||||
bool HomeActivity::restoreCoverBuffer() {
|
||||
if (!coverBuffer) {
|
||||
return false;
|
||||
}
|
||||
|
||||
uint8_t* frameBuffer = renderer.getFrameBuffer();
|
||||
if (!frameBuffer) {
|
||||
return false;
|
||||
}
|
||||
|
||||
const size_t bufferSize = GfxRenderer::getBufferSize();
|
||||
memcpy(frameBuffer, coverBuffer, bufferSize);
|
||||
return true;
|
||||
}
|
||||
|
||||
void HomeActivity::freeCoverBuffer() {
|
||||
if (coverBuffer) {
|
||||
free(coverBuffer);
|
||||
coverBuffer = nullptr;
|
||||
}
|
||||
coverBufferStored = false;
|
||||
}
|
||||
|
||||
void HomeActivity::loop() {
|
||||
@@ -138,8 +229,12 @@ void HomeActivity::displayTaskLoop() {
|
||||
}
|
||||
}
|
||||
|
||||
void HomeActivity::render() const {
|
||||
renderer.clearScreen();
|
||||
void HomeActivity::render() {
|
||||
// If we have a stored cover buffer, restore it instead of clearing
|
||||
const bool bufferRestored = coverBufferStored && restoreCoverBuffer();
|
||||
if (!bufferRestored) {
|
||||
renderer.clearScreen();
|
||||
}
|
||||
|
||||
const auto pageWidth = renderer.getScreenWidth();
|
||||
const auto pageHeight = renderer.getScreenHeight();
|
||||
@@ -154,34 +249,101 @@ void HomeActivity::render() const {
|
||||
constexpr int bookY = 30;
|
||||
const bool bookSelected = hasContinueReading && selectorIndex == 0;
|
||||
|
||||
// Bookmark dimensions (used in multiple places)
|
||||
const int bookmarkWidth = bookWidth / 8;
|
||||
const int bookmarkHeight = bookHeight / 5;
|
||||
const int bookmarkX = bookX + bookWidth - bookmarkWidth - 10;
|
||||
const int bookmarkY = bookY + 5;
|
||||
|
||||
// Draw book card regardless, fill with message based on `hasContinueReading`
|
||||
{
|
||||
if (bookSelected) {
|
||||
renderer.fillRect(bookX, bookY, bookWidth, bookHeight);
|
||||
} else {
|
||||
renderer.drawRect(bookX, bookY, bookWidth, bookHeight);
|
||||
// Draw cover image as background if available (inside the box)
|
||||
// Only load from SD on first render, then use stored buffer
|
||||
if (hasContinueReading && hasCoverImage && !coverBmpPath.empty() && !coverRendered) {
|
||||
// First time: load cover from SD and render
|
||||
FsFile file;
|
||||
if (SdMan.openFileForRead("HOME", coverBmpPath, file)) {
|
||||
Bitmap bitmap(file);
|
||||
if (bitmap.parseHeaders() == BmpReaderError::Ok) {
|
||||
// Calculate position to center image within the book card
|
||||
int coverX, coverY;
|
||||
|
||||
if (bitmap.getWidth() > bookWidth || bitmap.getHeight() > bookHeight) {
|
||||
const float imgRatio = static_cast<float>(bitmap.getWidth()) / static_cast<float>(bitmap.getHeight());
|
||||
const float boxRatio = static_cast<float>(bookWidth) / static_cast<float>(bookHeight);
|
||||
|
||||
if (imgRatio > boxRatio) {
|
||||
coverX = bookX;
|
||||
coverY = bookY + (bookHeight - static_cast<int>(bookWidth / imgRatio)) / 2;
|
||||
} else {
|
||||
coverX = bookX + (bookWidth - static_cast<int>(bookHeight * imgRatio)) / 2;
|
||||
coverY = bookY;
|
||||
}
|
||||
} else {
|
||||
coverX = bookX + (bookWidth - bitmap.getWidth()) / 2;
|
||||
coverY = bookY + (bookHeight - bitmap.getHeight()) / 2;
|
||||
}
|
||||
|
||||
// Draw the cover image centered within the book card
|
||||
renderer.drawBitmap(bitmap, coverX, coverY, bookWidth, bookHeight);
|
||||
|
||||
// Draw border around the card
|
||||
renderer.drawRect(bookX, bookY, bookWidth, bookHeight);
|
||||
|
||||
// No bookmark ribbon when cover is shown - it would just cover the art
|
||||
|
||||
// Store the buffer with cover image for fast navigation
|
||||
coverBufferStored = storeCoverBuffer();
|
||||
coverRendered = true;
|
||||
|
||||
// First render: if selected, draw selection indicators now
|
||||
if (bookSelected) {
|
||||
renderer.drawRect(bookX + 1, bookY + 1, bookWidth - 2, bookHeight - 2);
|
||||
renderer.drawRect(bookX + 2, bookY + 2, bookWidth - 4, bookHeight - 4);
|
||||
}
|
||||
}
|
||||
file.close();
|
||||
}
|
||||
} else if (!bufferRestored && !coverRendered) {
|
||||
// No cover image: draw border or fill, plus bookmark as visual flair
|
||||
if (bookSelected) {
|
||||
renderer.fillRect(bookX, bookY, bookWidth, bookHeight);
|
||||
} else {
|
||||
renderer.drawRect(bookX, bookY, bookWidth, bookHeight);
|
||||
}
|
||||
|
||||
// Draw bookmark ribbon when no cover image (visual decoration)
|
||||
if (hasContinueReading) {
|
||||
const int notchDepth = bookmarkHeight / 3;
|
||||
const int centerX = bookmarkX + bookmarkWidth / 2;
|
||||
|
||||
const int xPoints[5] = {
|
||||
bookmarkX, // top-left
|
||||
bookmarkX + bookmarkWidth, // top-right
|
||||
bookmarkX + bookmarkWidth, // bottom-right
|
||||
centerX, // center notch point
|
||||
bookmarkX // bottom-left
|
||||
};
|
||||
const int yPoints[5] = {
|
||||
bookmarkY, // top-left
|
||||
bookmarkY, // top-right
|
||||
bookmarkY + bookmarkHeight, // bottom-right
|
||||
bookmarkY + bookmarkHeight - notchDepth, // center notch point
|
||||
bookmarkY + bookmarkHeight // bottom-left
|
||||
};
|
||||
|
||||
// Draw bookmark ribbon (inverted if selected)
|
||||
renderer.fillPolygon(xPoints, yPoints, 5, !bookSelected);
|
||||
}
|
||||
}
|
||||
|
||||
// Bookmark icon in the top-right corner of the card
|
||||
const int bookmarkWidth = bookWidth / 8;
|
||||
const int bookmarkHeight = bookHeight / 5;
|
||||
const int bookmarkX = bookX + bookWidth - bookmarkWidth - 8;
|
||||
constexpr int bookmarkY = bookY + 1;
|
||||
|
||||
// Main bookmark body (solid)
|
||||
renderer.fillRect(bookmarkX, bookmarkY, bookmarkWidth, bookmarkHeight, !bookSelected);
|
||||
|
||||
// Carve out an inverted triangle notch at the bottom center to create angled points
|
||||
const int notchHeight = bookmarkHeight / 2; // depth of the notch
|
||||
for (int i = 0; i < notchHeight; ++i) {
|
||||
const int y = bookmarkY + bookmarkHeight - 1 - i;
|
||||
const int xStart = bookmarkX + i;
|
||||
const int width = bookmarkWidth - 2 * i;
|
||||
if (width <= 0) {
|
||||
break;
|
||||
}
|
||||
// Draw a horizontal strip in the opposite color to "cut" the notch
|
||||
renderer.fillRect(xStart, y, width, 1, bookSelected);
|
||||
// If buffer was restored, draw selection indicators if needed
|
||||
if (bufferRestored && bookSelected && coverRendered) {
|
||||
// Draw selection border (no bookmark inversion needed since cover has no bookmark)
|
||||
renderer.drawRect(bookX + 1, bookY + 1, bookWidth - 2, bookHeight - 2);
|
||||
renderer.drawRect(bookX + 2, bookY + 2, bookWidth - 4, bookHeight - 4);
|
||||
} else if (!coverRendered && !bufferRestored) {
|
||||
// Selection border already handled above in the no-cover case
|
||||
}
|
||||
}
|
||||
|
||||
@@ -218,18 +380,25 @@ void HomeActivity::render() const {
|
||||
lines.back().append("...");
|
||||
|
||||
while (!lines.back().empty() && renderer.getTextWidth(UI_12_FONT_ID, lines.back().c_str()) > maxLineWidth) {
|
||||
lines.back().resize(lines.back().size() - 5);
|
||||
// Remove "..." first, then remove one UTF-8 char, then add "..." back
|
||||
lines.back().resize(lines.back().size() - 3); // Remove "..."
|
||||
utf8RemoveLastChar(lines.back());
|
||||
lines.back().append("...");
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
int wordWidth = renderer.getTextWidth(UI_12_FONT_ID, i.c_str());
|
||||
while (wordWidth > maxLineWidth && i.size() > 5) {
|
||||
// Word itself is too long, trim it
|
||||
i.resize(i.size() - 5);
|
||||
i.append("...");
|
||||
wordWidth = renderer.getTextWidth(UI_12_FONT_ID, i.c_str());
|
||||
while (wordWidth > maxLineWidth && !i.empty()) {
|
||||
// Word itself is too long, trim it (UTF-8 safe)
|
||||
utf8RemoveLastChar(i);
|
||||
// Check if we have room for ellipsis
|
||||
std::string withEllipsis = i + "...";
|
||||
wordWidth = renderer.getTextWidth(UI_12_FONT_ID, withEllipsis.c_str());
|
||||
if (wordWidth <= maxLineWidth) {
|
||||
i = withEllipsis;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
int newLineWidth = renderer.getTextWidth(UI_12_FONT_ID, currentLine.c_str());
|
||||
@@ -261,24 +430,85 @@ void HomeActivity::render() const {
|
||||
// Vertically center the title block within the card
|
||||
int titleYStart = bookY + (bookHeight - totalTextHeight) / 2;
|
||||
|
||||
// If cover image was rendered, draw white box behind title and author
|
||||
if (coverRendered) {
|
||||
constexpr int boxPadding = 8;
|
||||
// Calculate the max text width for the box
|
||||
int maxTextWidth = 0;
|
||||
for (const auto& line : lines) {
|
||||
const int lineWidth = renderer.getTextWidth(UI_12_FONT_ID, line.c_str());
|
||||
if (lineWidth > maxTextWidth) {
|
||||
maxTextWidth = lineWidth;
|
||||
}
|
||||
}
|
||||
if (!lastBookAuthor.empty()) {
|
||||
std::string trimmedAuthor = lastBookAuthor;
|
||||
while (renderer.getTextWidth(UI_10_FONT_ID, trimmedAuthor.c_str()) > maxLineWidth && !trimmedAuthor.empty()) {
|
||||
utf8RemoveLastChar(trimmedAuthor);
|
||||
}
|
||||
if (renderer.getTextWidth(UI_10_FONT_ID, trimmedAuthor.c_str()) <
|
||||
renderer.getTextWidth(UI_10_FONT_ID, lastBookAuthor.c_str())) {
|
||||
trimmedAuthor.append("...");
|
||||
}
|
||||
const int authorWidth = renderer.getTextWidth(UI_10_FONT_ID, trimmedAuthor.c_str());
|
||||
if (authorWidth > maxTextWidth) {
|
||||
maxTextWidth = authorWidth;
|
||||
}
|
||||
}
|
||||
|
||||
const int boxWidth = maxTextWidth + boxPadding * 2;
|
||||
const int boxHeight = totalTextHeight + boxPadding * 2;
|
||||
const int boxX = (pageWidth - boxWidth) / 2;
|
||||
const int boxY = titleYStart - boxPadding;
|
||||
|
||||
// Draw white filled box
|
||||
renderer.fillRect(boxX, boxY, boxWidth, boxHeight, false);
|
||||
// Draw black border around the box
|
||||
renderer.drawRect(boxX, boxY, boxWidth, boxHeight, true);
|
||||
}
|
||||
|
||||
for (const auto& line : lines) {
|
||||
renderer.drawCenteredText(UI_12_FONT_ID, titleYStart, line.c_str(), !bookSelected);
|
||||
renderer.drawCenteredText(UI_12_FONT_ID, titleYStart, line.c_str(), !bookSelected || coverRendered);
|
||||
titleYStart += renderer.getLineHeight(UI_12_FONT_ID);
|
||||
}
|
||||
|
||||
if (!lastBookAuthor.empty()) {
|
||||
titleYStart += renderer.getLineHeight(UI_10_FONT_ID) / 2;
|
||||
std::string trimmedAuthor = lastBookAuthor;
|
||||
// Trim author if too long
|
||||
// Trim author if too long (UTF-8 safe)
|
||||
bool wasTrimmed = false;
|
||||
while (renderer.getTextWidth(UI_10_FONT_ID, trimmedAuthor.c_str()) > maxLineWidth && !trimmedAuthor.empty()) {
|
||||
trimmedAuthor.resize(trimmedAuthor.size() - 5);
|
||||
utf8RemoveLastChar(trimmedAuthor);
|
||||
wasTrimmed = true;
|
||||
}
|
||||
if (wasTrimmed && !trimmedAuthor.empty()) {
|
||||
// Make room for ellipsis
|
||||
while (renderer.getTextWidth(UI_10_FONT_ID, (trimmedAuthor + "...").c_str()) > maxLineWidth &&
|
||||
!trimmedAuthor.empty()) {
|
||||
utf8RemoveLastChar(trimmedAuthor);
|
||||
}
|
||||
trimmedAuthor.append("...");
|
||||
}
|
||||
renderer.drawCenteredText(UI_10_FONT_ID, titleYStart, trimmedAuthor.c_str(), !bookSelected);
|
||||
renderer.drawCenteredText(UI_10_FONT_ID, titleYStart, trimmedAuthor.c_str(), !bookSelected || coverRendered);
|
||||
}
|
||||
|
||||
renderer.drawCenteredText(UI_10_FONT_ID, bookY + bookHeight - renderer.getLineHeight(UI_10_FONT_ID) * 3 / 2,
|
||||
"Continue Reading", !bookSelected);
|
||||
// "Continue Reading" label at the bottom
|
||||
const int continueY = bookY + bookHeight - renderer.getLineHeight(UI_10_FONT_ID) * 3 / 2;
|
||||
if (coverRendered) {
|
||||
// Draw white box behind "Continue Reading" text
|
||||
const char* continueText = "Continue Reading";
|
||||
const int continueTextWidth = renderer.getTextWidth(UI_10_FONT_ID, continueText);
|
||||
constexpr int continuePadding = 6;
|
||||
const int continueBoxWidth = continueTextWidth + continuePadding * 2;
|
||||
const int continueBoxHeight = renderer.getLineHeight(UI_10_FONT_ID) + continuePadding;
|
||||
const int continueBoxX = (pageWidth - continueBoxWidth) / 2;
|
||||
const int continueBoxY = continueY - continuePadding / 2;
|
||||
renderer.fillRect(continueBoxX, continueBoxY, continueBoxWidth, continueBoxHeight, false);
|
||||
renderer.drawRect(continueBoxX, continueBoxY, continueBoxWidth, continueBoxHeight, true);
|
||||
renderer.drawCenteredText(UI_10_FONT_ID, continueY, continueText, true);
|
||||
} else {
|
||||
renderer.drawCenteredText(UI_10_FONT_ID, continueY, "Continue Reading", !bookSelected);
|
||||
}
|
||||
} else {
|
||||
// No book to continue reading
|
||||
const int y =
|
||||
|
||||
@@ -14,8 +14,13 @@ class HomeActivity final : public Activity {
|
||||
bool updateRequired = false;
|
||||
bool hasContinueReading = false;
|
||||
bool hasOpdsUrl = false;
|
||||
bool hasCoverImage = false;
|
||||
bool coverRendered = false; // Track if cover has been rendered once
|
||||
bool coverBufferStored = false; // Track if cover buffer is stored
|
||||
uint8_t* coverBuffer = nullptr; // HomeActivity's own buffer for cover image
|
||||
std::string lastBookTitle;
|
||||
std::string lastBookAuthor;
|
||||
std::string coverBmpPath;
|
||||
const std::function<void()> onContinueReading;
|
||||
const std::function<void()> onReaderOpen;
|
||||
const std::function<void()> onSettingsOpen;
|
||||
@@ -24,8 +29,11 @@ class HomeActivity final : public Activity {
|
||||
|
||||
static void taskTrampoline(void* param);
|
||||
[[noreturn]] void displayTaskLoop();
|
||||
void render() const;
|
||||
void render();
|
||||
int getMenuItemCount() const;
|
||||
bool storeCoverBuffer(); // Store frame buffer for cover image
|
||||
bool restoreCoverBuffer(); // Restore frame buffer from stored cover
|
||||
void freeCoverBuffer(); // Free the stored cover buffer
|
||||
|
||||
public:
|
||||
explicit HomeActivity(GfxRenderer& renderer, MappedInputManager& mappedInput,
|
||||
|
||||
Reference in New Issue
Block a user