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https://github.com/daveallie/crosspoint-reader.git
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6fbdd06101
Display book cover image as background in the Continue Reading card on the home screen, improving visual identification of the current book. Key changes: - Add thumbnail generation (thumb.bmp) for EPUB and XTC/XTCH files - Uses same dithering/scaling algorithms as sleep screen covers - Target size: 240x400 (half screen) for optimal Continue Reading card fit - Add JpegToBmpConverter::jpegFileToBmpStreamWithSize() for custom target sizes - Add GfxRenderer::copyStoredBwBuffer() and freeStoredBwBuffer() for framebuffer caching to maintain fast navigation performance - Add UTF-8 safe string truncation for Korean/CJK text in title/author display - Draw white boxes behind title/author text for readability over cover image - Increase HomeActivityTask stack size to 4096 for cover image rendering - Add bounds checking in XTC thumbnail generation to prevent buffer overflow
18 lines
724 B
C++
18 lines
724 B
C++
#pragma once
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class FsFile;
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class Print;
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class ZipFile;
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class JpegToBmpConverter {
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// [COMMENTED OUT] static uint8_t grayscaleTo2Bit(uint8_t grayscale, int x, int y);
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static unsigned char jpegReadCallback(unsigned char* pBuf, unsigned char buf_size,
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unsigned char* pBytes_actually_read, void* pCallback_data);
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static bool jpegFileToBmpStreamInternal(class FsFile& jpegFile, Print& bmpOut, int targetWidth, int targetHeight);
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public:
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static bool jpegFileToBmpStream(FsFile& jpegFile, Print& bmpOut);
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// Convert with custom target size (for thumbnails)
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static bool jpegFileToBmpStreamWithSize(FsFile& jpegFile, Print& bmpOut, int targetMaxWidth, int targetMaxHeight);
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};
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