JPG to PNG merge

JPG to PNG merge

Aspose.Imaging allows to merge images from, JPG to PNG merge. Below example shows how to perform it for horizontal merge

import com.aspose.imaging.*;
import com.aspose.imaging.fileformats.jpeg.JpegImage;
import com.aspose.imaging.imageoptions.JpegOptions;
import com.aspose.imaging.imageoptions.PngOptions;
import com.aspose.imaging.sources.FileCreateSource;

String[] imagePaths = { "image1.jpg", "image2.jpg", "image3.jpg", "image4.JPG", "image5.png" };

String outputPath = "output-horizontal.jpg";
String tempFilePath = "temp.jpg";

// Getting resulting image size.
int newWidth = 0;
int newHeight = 0;
for (String imagePath : imagePaths)
{
	try (RasterImage image = (RasterImage) Image.load(imagePath))
	{
		Size size = image.getSize();
		newWidth += size.getWidth();
		newHeight = Math.max(newHeight, size.getHeight());
	}
}

// Combining images into new one.
try (JpegOptions options = new JpegOptions())
{
	Source tempFileSource = new FileCreateSource(tempFilePath, true);
	options.setSource(tempFileSource);
	options.setQuality(100);

	try (JpegImage newImage = (JpegImage) Image.create(options, newWidth, newHeight))
	{
		int stitchedWidth = 0;
		for (String imagePath : imagePaths)
		{
			try(RasterImage image = (RasterImage) Image.load(imagePath))
			{
				Rectangle bounds = new Rectangle(stitchedWidth, 0, image.getWidth(), image.getHeight());
				newImage.saveArgb32Pixels(bounds, image.loadArgb32Pixels(image.getBounds()));
				stitchedWidth += image.getWidth();
			}
		}

		newImage.save(outputPath, new PngOptions());
	}
}

and vertical merge

import com.aspose.imaging.Image;
import com.aspose.imaging.RasterImage;
import com.aspose.imaging.Rectangle;
import com.aspose.imaging.Size;
import com.aspose.imaging.fileformats.jpeg.JpegImage;
import com.aspose.imaging.imageoptions.JpegOptions;
import com.aspose.imaging.imageoptions.PngOptions;
import com.aspose.imaging.sources.StreamSource;


String[] imagePaths = { "image1.jpg", "image2.jpg", "image3.jpg", "image4.JPG", "image5.png" };

String outputPath = "output-vertical.jpg";

// Getting resulting image size.
int newWidth = 0;
int newHeight = 0;
for (String imagePath : imagePaths)
{
	try (RasterImage image = (RasterImage) Image.load(imagePath))
	{
		Size size = image.getSize();
		newWidth = Math.max(newWidth, size.getWidth());
		newHeight += size.getHeight();
	}
}

// Combining images into new one.
try (JpegOptions options = new JpegOptions())
{
	options.setSource(new StreamSource()); // empty
	options.setQuality(100);

	try (JpegImage newImage = (JpegImage) Image.create(options, newWidth, newHeight))
	{
		int stitchedHeight = 0;
		for (String imagePath : imagePaths)
		{
			try(RasterImage image = (RasterImage) Image.load(imagePath))
			{
				Rectangle bounds = new Rectangle(0, stitchedHeight, image.getWidth(), image.getHeight());
				newImage.saveArgb32Pixels(bounds, image.loadArgb32Pixels(image.getBounds()));
				stitchedHeight += image.getHeight();
			}
		}

		newImage.save(outputPath, new PngOptions());
	}
}