- (BOOL)feedLoad:(const unsigned char *)buffer length:(NSUInteger)length error:(NSError **)error
- (BOOL)feedLoadData:(NSData *)data length:(NSUInteger)length error:(NSError **)error
data
The image file unmanaged memory data.
length
Total size (in bytes) of the image data.
Use this method with the StartFeedLoad and StopFeedLoad methods.
For a description of how the methods relate to each other, refer to StartFeedLoad.
LEADTOOLS will attempt to load corrupted files so you can see at least a portion of the image. For these images, the load methods succeed, but LoadStatus will return an error code.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using Leadtools.Svg;
public void FeedLoadExample()
{
RasterCodecs codecs = new RasterCodecs();
codecs.CancelFeedLoad();
string url = @"https://www.leadtools.com/images/page_graphics/leadlogo.png";
string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "FeedLoad.bmp");
// Create a WebRequest for the URL
WebRequest request = WebRequest.Create(url);
request.Proxy.Credentials = CredentialCache.DefaultCredentials;
// reduce the timeout to 20sec
request.Timeout = 20000;
WebResponse response = request.GetResponse();
try
{
Stream strm = response.GetResponseStream();
// Read chunks from the stream and feed load to the image
codecs.StartFeedLoad(0, CodecsLoadByteOrder.BgrOrGray);
const int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int read;
do
{
System.Windows.Forms.Application.DoEvents();
read = strm.Read(buffer, 0, bufferSize);
Debug.WriteLine("Downloading {0} bytes", read);
if (read > 0)
codecs.FeedLoad(buffer, 0, read);
}
while (read > 0);
}
finally
{
response.Close();
}
RasterImage image = codecs.StopFeedLoad();
// Save the image to disk
codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);
image.Dispose();
// Clean up
codecs.Dispose();
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images";
}
import java.io.*;
import java.net.*;
import java.nio.file.Paths;
import java.util.*;
import java.time.Instant;
import java.time.Duration;
import org.junit.*;
import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;
import static org.junit.Assert.*;
import leadtools.*;
import leadtools.codecs.*;
import leadtools.codecs.RasterCodecs.FeedCallbackThunk;
import leadtools.drawing.internal.*;
import leadtools.imageprocessing.*;
import leadtools.imageprocessing.color.ChangeIntensityCommand;
import leadtools.svg.*;
public void feedLoadExample() throws IOException {
final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images";
RasterCodecs codecs = new RasterCodecs();
URL url = new URL("https://www.leadtools.com/images/page_graphics/leadlogo.png");
String destFileName = combine(LEAD_VARS_IMAGES_DIR, "FeedLoad.bmp");
// Create a WebRequest for the URL
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("GET");
con.setDefaultUseCaches(true);
// reduce the timeout to 20sec
con.setConnectTimeout(20000);
con.setReadTimeout(20000);
con.getResponseCode();
FeedCallbackThunk feedLoad;
try {
InputStream requestInput = con.getInputStream();
// Read chunks from the stream and feed load to the image
feedLoad = codecs.startFeedLoad(0, CodecsLoadByteOrder.BGR_OR_GRAY);
final int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int read;
do {
read = requestInput.read(buffer, 0, bufferSize);
System.out.println("Downloading " + read + " bytes");
if (read > 0)
feedLoad.feedLoad(buffer, 0, read);
} while (read > 0);
requestInput.close();
} finally {
con.disconnect();
}
RasterImage image = feedLoad.stopFeedLoad();
// Save the image to disk
codecs.save(image, destFileName, RasterImageFormat.BMP, 24);
assertTrue("Image unsuccessfully saved", (new File(destFileName)).exists());
System.out.println("Saved image at" + destFileName);
// Clean up
image.dispose();
codecs.dispose();
}
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