How to load android.Image jpeg data as Texture2d RGBA format?

Massdrive · January 31, 2024, 7:47am

Hi,
I’m trying to load phone cam stream as a texture for a Quad geometry.
Right now , I have to save the android.image to a jpeg file then use assetManager to load it.
or set the Image format as Pixel.rgba888 then I have no difficulty to copy data buffer to a JME texture2D.
Problem for me is, only jpeg format is guaranteed for all android phones.

Is there a way to just transfer the Android.Image jpeg buffer data into a rgba format data ?

Pavl_G · January 31, 2024, 9:27am

Have you tried using ByteBuffer Image.Plane#getBuffer() to retrieve the direct byte buffer?

EDIT:
I think this is then what you need after retrieving the direct buffer, it should be fitted here to transfer the data to a JME image:

github.com

jMonkeyEngine/jmonkeyengine/blob/8560c20f8815b38af76b9937f9779404df7377d4/jme3-core/src/main/java/com/jme3/opencl/Image.java#L349-L362


      
          /**
           * Performs an async/non-blocking write from the specified byte buffer into the image.
           *
           * @param queue the command queue
           * @param src the source buffer
           * @param origin the image origin location, see class description for the format
           * @param region the copied region, see class description for the format
           * @param rowPitch the row pitch of the target buffer, must be set to 0 if the image is 1D.
           * If set to 0 for 2D and 3D image, the row pitch is calculated as {@code bytesPerElement * width}
           * @param slicePitch the slice pitch of the target buffer, must be set to 0 for 1D and 2D images.
           * If set to 0 for 3D images, the slice pitch is calculated as {@code rowPitch * height}
           * @return the event object indicating the status of the operation
           */
          public abstract Event writeImageAsync(CommandQueue queue, ByteBuffer src, long[] origin, long[] region, long rowPitch, long slicePitch);

Massdrive · February 1, 2024, 6:07am

Yes, I did.
Problem is : the data in the direct buffer is in Android.ImageFormat.jpeg format and I’d like to transform it into Jme.Image formats like: RGBA8888.

Gutsyneca · February 21, 2024, 1:04pm

Regarding your query, converting Android.Image jpeg buffer data into RGBA format might require some custom processing. You could explore libraries or APIs that specialize in image manipulation to facilitate this conversion seamlessly. It might involve decoding the JPEG data and then re-encoding it into the desired RGBA format.
While diving into this conversion process, don’t forget to optimize your image handling for better performance and storage efficiency. Compressing images can be a game-changer in this aspect. compress image tools offer a user-friendly way to reduce file sizes without compromising image quality, ensuring smooth operation in your application.