how i can put image in background of canvas?

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Java

My question about jogl. I put image on canvas. But i can't change polygons color when i drawing polygon also while there was no background image, set the color of the polygon.

Image code

gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
        gl.glEnable(GL.GL_BLEND);
        BufferedImage bufferedImage = null;
        int w = 0;
        int h = 0;
        try {
            bufferedImage = ImageIO.read(OpenGLFuncition.class.getResource("kibris.png"));
            w = bufferedImage.getWidth();
            h = bufferedImage.getHeight();
        } catch (IOException ex) {
        }
        WritableRaster raster =
                Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE,
                w,
                h,
                4,
                null);
        ComponentColorModel colorModel =
                new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB),
                new int[]{8, 8, 8, 8},
                true,
                false,
                ComponentColorModel.TRANSLUCENT,
                DataBuffer.TYPE_BYTE);
        BufferedImage dukeImg =
                new BufferedImage(colorModel,
                raster,
                false,
                null);

        Graphics2D g = dukeImg.createGraphics();
        g.drawImage(bufferedImage, null, null);
        DataBufferByte dukeBuf =
                (DataBufferByte) raster.getDataBuffer();
        byte[] dukeRGBA = dukeBuf.getData();
        ByteBuffer bb = ByteBuffer.wrap(dukeRGBA);

//        if (durum == 0) {
//   
//            gl.glBindTexture(GL.GL_TEXTURE_2D, 13);
//            gl.glPixelStorei(GL.GL_UNPACK_ALIGNMENT, 1);
//            gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP);
//            gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP);
//        } else {
//          
//        }
        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
        gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR);
        gl.glTexEnvf(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_REPLACE);
        gl.glTexImage2D(GL.GL_TEXTURE_2D, 0, GL.GL_RGBA, w, h, 0, GL.GL_RGBA,
                GL.GL_UNSIGNED_BYTE, bb);

        int left = 0;
        int top = 0;
        gl.glEnable(GL.GL_TEXTURE_2D);
        gl.glBindTexture(GL.GL_TEXTURE_2D, 13);
        gl.glBegin(GL.GL_POLYGON);
        gl.glTexCoord2d(0, 0);
        gl.glVertex2d(left, top);
        gl.glTexCoord2d(1, 0);
        gl.glVertex2d(left + w, top);
        gl.glTexCoord2d(1, 1);
        gl.glVertex2d(left + w, top + h);
        gl.glTexCoord2d(0, 1);
        gl.glVertex2d(left, top + h);
        gl.glEnd();

Is there another way to put pictures to canvas?