package integeruser.jglsdk.glimg;

import integeruser.jglsdk.glimg.ImageFormat.*;
import integeruser.jglsdk.glimg.ImageSet.Dimensions;

import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.nio.file.Paths;

import static org.lwjgl.stb.STBImage.stbi_load;


/**
 * Visit https://github.com/integeruser/jgltut for info and updates.
 * Original: https://bitbucket.org/alfonse/unofficial-opengl-sdk/src/default/glimg/source/StbLoader.cpp
 */
public class StbLoader {
    private static ImageSet buildImageSetFromIntegerData(ByteBuffer image, int width, int height, int numComponents) {
        Dimensions imageDimensions = new Dimensions();
        imageDimensions.numDimensions = 2;
        imageDimensions.depth = 0;
        imageDimensions.width = width;
        imageDimensions.height = height;

        UncheckedImageFormat uncheckedImageFormat = new UncheckedImageFormat();
        uncheckedImageFormat.type = PixelDataType.NORM_UNSIGNED_INTEGER;

        switch (numComponents) {
            case 1:
                uncheckedImageFormat.format = PixelComponents.COLOR_RED;
                break;

            case 2:
                uncheckedImageFormat.format = PixelComponents.COLOR_RG;
                break;

            case 3:
                uncheckedImageFormat.format = PixelComponents.COLOR_RGB;
                break;

            case 4:
                uncheckedImageFormat.format = PixelComponents.COLOR_RGBA;
                break;
        }

        uncheckedImageFormat.order = ComponentOrder.RGBA;
        uncheckedImageFormat.bitDepth = BitDepth.PER_COMP_8;
        uncheckedImageFormat.lineAlignment = 1;

        byte[] imageData = new byte[width * height * numComponents];
        image.get(imageData);

        ImageCreator imgCreator = new ImageCreator(new ImageFormat(uncheckedImageFormat), imageDimensions, 1, 1, 1);
        imgCreator.setImageData(imageData, true, 0, 0, 0);
        return imgCreator.createImage();
    }

    public static ImageSet loadFromFile(String imagePath) throws IOException, URISyntaxException {
        String path = Paths.get(StbLoader.class.getResource(imagePath).toURI()).toString();
        int[] x = new int[1];
        int[] y = new int[1];
        int[] comp = new int[1];
        ByteBuffer image = stbi_load(path, x, y, comp, 0);

        return buildImageSetFromIntegerData(image, x[0], y[0], comp[0]);
    }
}

package integeruser.jglsdk.glimg;

import integeruser.jglsdk.glimg.ImageFormat.*;
import integeruser.jglsdk.glimg.ImageSet.Dimensions;

import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.nio.file.Paths;

import static org.lwjgl.stb.STBImage.stbi_load;


/**
 * Visit https://github.com/integeruser/jgltut for info and updates.
 * Original: https://bitbucket.org/alfonse/unofficial-opengl-sdk/src/default/glimg/source/StbLoader.cpp
 */
public class StbLoader {
    private static ImageSet buildImageSetFromIntegerData(ByteBuffer image, int width, int height, int numComponents) {
        Dimensions imageDimensions = new Dimensions();
        imageDimensions.numDimensions = 2;
        imageDimensions.depth = 0;
        imageDimensions.width = width;
        imageDimensions.height = height;

        UncheckedImageFormat uncheckedImageFormat = new UncheckedImageFormat();
        uncheckedImageFormat.type = PixelDataType.NORM_UNSIGNED_INTEGER;

        switch (numComponents) {
            case 1:
                uncheckedImageFormat.format = PixelComponents.COLOR_RED;
                break;

            case 2:
                uncheckedImageFormat.format = PixelComponents.COLOR_RG;
                break;

            case 3:
                uncheckedImageFormat.format = PixelComponents.COLOR_RGB;
                break;

            case 4:
                uncheckedImageFormat.format = PixelComponents.COLOR_RGBA;
                break;
        }

        uncheckedImageFormat.order = ComponentOrder.RGBA;
        uncheckedImageFormat.bitDepth = BitDepth.PER_COMP_8;
        uncheckedImageFormat.lineAlignment = 1;

        byte[] imageData = new byte[width * height * numComponents];
        image.get(imageData);

        ImageCreator imgCreator = new ImageCreator(new ImageFormat(uncheckedImageFormat), imageDimensions, 1, 1, 1);
        imgCreator.setImageData(imageData, true, 0, 0, 0);
        return imgCreator.createImage();
    }

    public static ImageSet loadFromFile(String imagePath) throws URISyntaxException {
        String path = Paths.get(StbLoader.class.getResource(imagePath).toURI()).toString();
        int[] x = new int[1];
        int[] y = new int[1];
        int[] comp = new int[1];
        ByteBuffer image = stbi_load(path, x, y, comp, 0);

        return buildImageSetFromIntegerData(image, x[0], y[0], comp[0]);
    }
}

Remove unused throw