private void button2_Click(object sender, EventArgs e)
{
//// C# Example
Libdmtx.EncodeOptions o = new Libdmtx.EncodeOptions();
byte[] dataToEncode = Encoding.ASCII.GetBytes("Hello World!");
Libdmtx.DmtxEncoded en = Dmtx.Encode(dataToEncode, o);
pictureBox1.Image = en.Bitmap;
//byte b = dmtxEncodeCreate();
//string s = dmtxVersion();
}
public void TestStrideAndPadding()
{
EncodeOptions encodeOptions = new EncodeOptions {
MarginSize = 2,
ModuleSize = 2
};
DmtxEncoded encoded = Dmtx.Encode(Encoding.ASCII.GetBytes("t"), encodeOptions);
Bitmap bm = encoded.Bitmap;
// make sure we have an image who's stride is not divisable by 3
int stride;
ExecuteBitmapToByteArray(bm, out stride);
if (stride % 3 == 0) {
bm = BitmapIncreaseCanvas(bm, bm.Width + 1, bm.Height, Color.White);
ExecuteBitmapToByteArray(bm, out stride);
}
Assert.AreNotEqual(0, stride % 3, "Stride was divisable by 3 which doesn't make a very good test");
DecodeOptions opt = new DecodeOptions();
Bitmap diagnoseImage;
DmtxDecoded[] decodedImages = Dmtx.Decode(bm, opt, DiagnosticImageStyles.Default, out diagnoseImage);
//diagnoseImage.Save("c:/temp/diagnose.bmp", ImageFormat.Bmp);
Assert.AreEqual(24.0, diagnoseImage.Width, 1.0);
Assert.AreEqual(24.0, diagnoseImage.Height, 1.0);
Assert.AreEqual(1, decodedImages.Length, "Didn't find barcode");
// make sure the left line is straight up and down (not skewed)
for (int y = 4; y < diagnoseImage.Height - 4; y++) {
Color clrLeft = diagnoseImage.GetPixel(1, y);
Color clrRight = diagnoseImage.GetPixel(3, y);
Assert.AreEqual(1.0, clrLeft.GetBrightness(), 0.01, "at location [1, " + y + "]");
Assert.AreEqual(0.698, clrRight.GetBrightness(), 0.01, "at location [3, " + y + "]");
}
}
public void TestEncode()
{
Bitmap expectedBitmap = GetBitmapFromResource("Libdmtx.TestImages.Test001.png");
byte[] data = Encoding.ASCII.GetBytes("Test");
EncodeOptions opt = new EncodeOptions();
DmtxEncoded encodeResults = Dmtx.Encode(data, opt);
Assert.IsNotNull(encodeResults);
AssertAreEqual(expectedBitmap, encodeResults.Bitmap);
}
/// <summary>
/// Encodes data into a DataMatrix barcode.
/// </summary>
/// <param name="data">The data to encode.</param>
/// <param name="options">The options used for encoding.</param>
/// <returns>The results from encoding.</returns>
/// <example>
/// This example shows a basic encoding.
/// <code>
/// byte[] data = Encoding.ASCII.GetBytes("test");
/// EncodeOptions o = new EncodeOptions();
/// DmtxEncoded encodeResults = Dmtx.Encode(data, o);
/// encodeResults.Bitmap.Save("barcode.bmp", ImageFormat.Bmp);
/// </code>
/// </example>
public static DmtxEncoded Encode(byte[] data, EncodeOptions options)
{
IntPtr result;
byte status;
try {
status = DmtxEncode(data, (UInt16)data.Length, out result, options);
} catch (Exception ex) {
throw new DmtxException("Encoding error.", ex);
}
if (status == RETURN_NO_MEMORY) {
throw new DmtxOutOfMemoryException("Not enough memory.");
} else if (status == RETURN_INVALID_ARGUMENT) {
throw new DmtxInvalidArgumentException("Invalid options configuration.");
} else if (status == RETURN_ENCODE_ERROR) {
throw new DmtxException("Error while encoding.");
} else if ((status > 0) || (result == IntPtr.Zero)) {
throw new DmtxException("Unknown error.");
}
DmtxEncoded ret;
EncodedInternal intResult = null;
try {
intResult = (EncodedInternal)Marshal.PtrToStructure(result, typeof(EncodedInternal));
ret = new DmtxEncoded();
ret.SymbolInfo = intResult.SymbolInfo;
ret.Bitmap = new Bitmap((int)intResult.Width, (int)intResult.Height, PixelFormat.Format24bppRgb);
Rectangle rect = new Rectangle(0, 0, ret.Bitmap.Width, ret.Bitmap.Height);
BitmapData bd = ret.Bitmap.LockBits(rect, ImageLockMode.WriteOnly, PixelFormat.Format24bppRgb);
try {
DmtxCopyEncodeResult(intResult.Data, (UInt32)Math.Abs(bd.Stride), bd.Scan0);
} finally {
ret.Bitmap.UnlockBits(bd);
}
} catch (Exception ex) {
throw new DmtxException("Error parsing encode result.", ex);
} finally {
try {
if (intResult != null) {
DmtxFreeEncodeResult(intResult.Data);
}
} catch (Exception ex) {
throw new DmtxException("Error freeing memory.", ex);
}
}
return ret;
}
