Convert RGBA color buffer to RGB color buffer - Android Graphics

Android examples for Graphics:Color RGB Value

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Description

Convert RGBA color buffer to RGB color buffer

Demo Code


import java.nio.ByteBuffer;

public class Main{
    /**/*from w  w  w  .ja v a2s  .c o m*/
     * Convert RGBA color buffer to RGB color buffer 
     * 
     * @param rgbaBuffer The RGBA buffer
     * @return The converted RGB buffer
     */
    public static ByteBuffer RGBAtoRGB(final ByteBuffer rgbaBuffer) {
        //android.util.Log.d(TAG,"RGBAtoRGB()");
        final ByteBuffer rgbBuffer = ByteBufferPool.getInstance()
                .getDirectByteBuffer(rgbaBuffer.capacity() * 3 / 4);
        rgbBuffer.position(0);
        rgbaBuffer.position(0);
        final byte[] pixelBytes = new byte[3];
        while (rgbaBuffer.hasRemaining()) {
            ((ByteBuffer) rgbaBuffer).get(pixelBytes);
            rgbBuffer.put(pixelBytes);
            ((ByteBuffer) rgbaBuffer).get();
        }

        ByteBufferPool.getInstance().returnDirectBuffer(rgbaBuffer);

        return (ByteBuffer) rgbBuffer.position(0);
    }
}

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