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POHow to generate a dynamic GRF image to ZPL ZEBRA print
 

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  1. POHow to generate a dynamic GRF image to ZPL ZEBRA print
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    <p>I have a problem.</p> <p>I´m generating a dynamic BMP image and trying to send this to a ZEBRA printer by ZPL commands. I need to convert my BMP to a GRF image. I think that my Hexadecimal extracted by the BMP image isn´t correct.</p> <p>The printed image is blurred and incorrect.</p> <p>This is my code:</p> <pre><code>string bitmapFilePath = @oldArquivo; // file is attached to this support article byte[] bitmapFileData = System.IO.File.ReadAllBytes(bitmapFilePath); int fileSize = bitmapFileData.Length; Bitmap ImgTemp = new Bitmap(bitmapFilePath); Size ImgSize = ImgTemp.Size; ImgTemp.Dispose(); // The following is known about test.bmp. It is up to the developer // to determine this information for bitmaps besides the given test.bmp. int width = ImgSize.Width; int height = ImgSize.Height; int bitmapDataOffset = 62; // 62 = header of the image int bitmapDataLength = fileSize - 62;// 8160; double widthInBytes = Math.Ceiling(width / 8.0); // Copy over the actual bitmap data from the bitmap file. // This represents the bitmap data without the header information. byte[] bitmap = new byte[bitmapDataLength]; Buffer.BlockCopy(bitmapFileData, bitmapDataOffset, bitmap, 0, (bitmapDataLength)); // Invert bitmap colors for (int i = 0; i &lt; bitmapDataLength; i++) { bitmap[i] ^= 0xFF; } // Create ASCII ZPL string of hexadecimal bitmap data string ZPLImageDataString = BitConverter.ToString(bitmap).Replace("-", string.Empty); string comandoCompleto = "~DG" + nomeImagem + ".GRF,0" + bitmapDataLength.ToString() + ",0" + widthInBytes.ToString() + "," + ZPLImageDataString; </code></pre>
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