Example usage for android.opengl ETC1 getEncodedDataSize

Introduction

In this page you can find the example usage for android.opengl ETC1 getEncodedDataSize.

Prototype

public static native int getEncodedDataSize(int width, int height);

Source Link

Document

Return the size of the encoded image data (does not include size of PKM header).

Usage

From source file:org.ros.android.rviz_for_android.drawable.loader.ColladaLoader.java

private ETC1Texture compressBitmap(Bitmap uncompressedBitmap) {
    // Rescale the bitmap to be half its current size
    Bitmap uncompressedBitmapResize = Bitmap.createScaledBitmap(uncompressedBitmap,
            uncompressedBitmap.getWidth() / 4, uncompressedBitmap.getHeight() / 4, true);
    uncompressedBitmap.recycle();/*from w ww  .  j  a  v a  2 s  .c o m*/

    // Copy the bitmap to a byte buffer
    ByteBuffer uncompressedBytes = ByteBuffer.allocateDirect(uncompressedBitmapResize.getByteCount())
            .order(ByteOrder.nativeOrder());
    uncompressedBitmapResize.copyPixelsToBuffer(uncompressedBytes);
    uncompressedBytes.position(0);

    int width = uncompressedBitmapResize.getWidth();
    int height = uncompressedBitmapResize.getHeight();

    // Compress the texture
    int encodedSize = ETC1.getEncodedDataSize(width, height);
    ByteBuffer compressed = ByteBuffer.allocateDirect(encodedSize).order(ByteOrder.nativeOrder());
    ETC1.encodeImage(uncompressedBytes, width, height, 2, 2 * width, compressed);

    ETC1Texture retval = new ETC1Texture(width, height, compressed);

    // We're done with the uncompressed bitmap, release it
    uncompressedBitmapResize.recycle();

    return retval;
}

---