热敏打印机打印二维码图片

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http://blog.csdn.net/sdvch/article/details/45079375

最近研究热敏打印机打印二维码，用到了北洋OPOS二次开发包DLL，借鉴该代码：http://www.cnblogs.com/datacool/archive/2012/11/27/2014666.html ,下面是扩展的一个打印图片的方法

/// <summary> /// 打印图片 /// </summary> /// <param name="bmp"></param> public void PrintBmp(Bitmap bmp){ byte[] data = new byte[] { 0x1B, 0x33, 0x00 }; POS_WriteFile(POS_IntPtr, data, (uint)data.Length); data[0] = (byte)'x00'; data[1] = (byte)'x00'; data[2] = (byte)'x00'; // Clear to Zero. Color pixelColor; //ESC * m nL nH d1…dk 选择位图模式 // ESC * m nL nH byte[] escBmp = new byte[] { 0x1B, 0x2A, 0x00, 0x00, 0x00 }; escBmp[2] = (byte)'x21'; //nL, nH escBmp[3] = (byte)(bmp.Width % 256); escBmp[4] = (byte)(bmp.Width / 256);//循环图片像素打印图片//循环高 for (int i = 0; i < (bmp.Height / 24 + 1); i++){//设置模式为位图模式 POS_WriteFile(POS_IntPtr, escBmp, (uint)escBmp.Length);//循环宽 for (int j = 0; j < bmp.Width; j++){ for (int k = 0; k < 24; k++){ if (((i * 24) + k) < bmp.Height) // if within the BMP size{ pixelColor = bmp.GetPixel(j, (i * 24) + k); if (pixelColor.R == 0){ data[k / 8] += (byte)(128 >> (k % 8));}}}//一次写入一个data，24个像素 POS_WriteFile(POS_IntPtr, data, (uint)data.Length); data[0] = (byte)'x00'; data[1] = (byte)'x00'; data[2] = (byte)'x00'; // Clear to Zero.}//换行，打印第二行 byte[] data2 = { 0xA }; POS_WriteFile(POS_IntPtr, data2, (uint)data2.Length); } // data byte[] data3 = { 0xA, 0xA }; POS_WriteFile(POS_IntPtr, data3, (uint)data3.Length);

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