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POlibjpeg/CreateDIBSection problem
 

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    <p>I'm writing a Win32-based application that displays jpeg images from a database. I picked libjpeg as the decoder, but most images display incorrectly. It can be fixed by increasing or decreasing the width of image by one, however, images that have been displayed correctly before display incorrectly after this fix. Here's part of my code (excluding RGB to BGR conversion):</p> <pre><code>int JpegToRaw(BYTE *input, int insize, BYTE *output, int &amp;width, int &amp;height) { struct jpeg_decompress_struct cinfo; struct jpeg_error_mgr jerr; cinfo.err = jpeg_std_error(&amp;jerr); jpeg_create_decompress(&amp;cinfo); jpeg_mem_src(&amp;cinfo, input, insize); jpeg_read_header(&amp;cinfo, TRUE); jpeg_start_decompress(&amp;cinfo); //--cinfo.output_width; or ++cinfo.output_width; int row_stride = cinfo.output_width * 3; int outsize = row_stride * cinfo.output_height; output = (BYTE *)malloc(outsize * sizeof(BYTE)); BYTE *pos = output; while (cinfo.output_scanline &lt; cinfo.output_height) { jpeg_read_scanlines(&amp;cinfo, &amp;pos, 1); pos += row_stride; } width = cinfo.output_width; height = cinfo.output_height; jpeg_finish_decompress(&amp;cinfo); jpeg_destroy_decompress(&amp;cinfo); return outsize; } HBITMAP RawToBitmap(BYTE *input, int size, int width, int height) { BITMAPINFO bi; bi.bmiHeader.biSize = sizeof(bi24BitInfo.bmiHeader); bi.bmiHeader.biWidth = width; bi.bmiHeader.biHeight = -height; bi.bmiHeader.biPlanes = 1; bi.bmiHeader.biBitCount = 24; bi.bmiHeader.biCompression = BI_RGB; HBITMAP hBitmap = CreateDIBSection(NULL, &amp;bi, DIB_RGB_COLORS, NULL, NULL, 0); SetBitmapBits(hBitmap, size, input); return hBitmap; } </code></pre> <p>I'm sure I pass valid jpeg arrays to <code>JpegToRaw()</code>, but I have no idea why do the images display different. Can someone help me to get it?</p>
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