881f866d86
- Add JpegToBmpConverter::getJpegDimensions() to extract JPEG dimensions - Fix getCoverBmpPath() ternary operator precedence bug - Pre-calculate exact dimensions per mode: * FIT: width=480px, height=(480*jpegHeight)/jpegWidth * CROP: height=800px, width=(800*jpegWidth)/jpegHeight - Generate separate cache files (cover_fit.bmp vs cover_crop.bmp) - Eliminates runtime scaling artifacts, improves sleep screen clarity
22 lines
1.0 KiB
C++
22 lines
1.0 KiB
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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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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bool oneBit);
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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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// Convert to 1-bit BMP (black and white only, no grays) for fast home screen rendering
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static bool jpegFileTo1BitBmpStreamWithSize(FsFile& jpegFile, Print& bmpOut, int targetMaxWidth, int targetMaxHeight);
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// Get JPEG dimensions without full conversion
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static bool getJpegDimensions(FsFile& jpegFile, int& width, int& height);
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};
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