BITMAPINFOHEADER::biClrUsed值,在某些APP(如光大)中需要指定用以表明调色板颜色数量
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@ -469,6 +469,7 @@ std::string scanned_img::file_header(SANE_ImageType type, float resolution)
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pal_size = 2 * sizeof(int);
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else if (bih.biBitCount == 8)
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pal_size = 256 * sizeof(int);
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bih.biClrUsed = pal_size / sizeof(int); // some APP (PJScanner.exe 光大……) use this field to calculate pallete
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{
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BITMAPFILEHEADER fh = { 0 };
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