fecd1849b9
## 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)
20 lines
904 B
C++
20 lines
904 B
C++
#pragma once
|
|
|
|
class FsFile;
|
|
class Print;
|
|
class ZipFile;
|
|
|
|
class JpegToBmpConverter {
|
|
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);
|
|
};
|