Distorted Android

///////////////////////////////////////////////////////////////////////////////////////////////////

// modify it under the terms of the GNU Lesser General Public                                    //

// License as published by the Free Software Foundation; either                                  //

// version 2.1 of the License, or (at your option) any later version.                            //

// Lesser General Public License for more details.                                               //

// License along with this library; if not, write to the Free Software                           //

// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA                //

///////////////////////////////////////////////////////////////////////////////////////////////////

import android.graphics.Canvas;

import android.graphics.Paint;

 * Class which represents the Screen.

 * <p>

 * User is able to render to it just like to a DistortedFramebuffer.

 */

  private static final float DEBUG_FRAC     = 0.5f;

  private static final int DEBUG_MODE_FPS  = 1;

  private static final int DEBUG_MODE_FRAME= 2;

  private boolean mDebugAllocated;

  private MeshQuad debugMesh;

  private DistortedTexture debugTexture;

  private DistortedEffects debugEffects;

  private Canvas debugCanvas;

  private Bitmap debugBitmap;

  private long[] durations;

  private int currDuration;

  private static final MatrixEffectMove mMoveEffect = new MatrixEffectMove(mMoveVector);

  private int mToBeBlittedFBO;    // FBO one we have rendered. Then, we keep blitting the one we

  private boolean mFirstCircle;   // rendered FBO_QUEUE_SIZE ago.

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * Create a new Screen. Initially 1x1 in size.

 * <p>

  public DistortedScreen()

    {

    mToBeBlittedFBO = 0;

    mFirstCircle = true;

 * Draws all the attached children to this OutputSurface.

 * <p>

 * Must be called from a thread holding OpenGL Context.

 *

 * @param time Current time, in milliseconds. This will be passed to all the Effects stored in the children Nodes.

 * @return Number of objects rendered.

 */

  public int render(long time)

    {

      if( lastTime==0 ) lastTime = time;

        {

        currDuration++;

        if (currDuration >= NUM_FRAMES) currDuration = 0;

        durations[NUM_FRAMES] += ((time - lastTime) - durations[currDuration]);

        durations[currDuration] = time - lastTime;

        debugString = "" + ((int)(10000.0f*NUM_FRAMES/durations[NUM_FRAMES]))/10.0f;

        }

      else if( mDebugMode==DEBUG_MODE_FRAME )

        {

        debugString = "" + frameNumber;

        frameNumber++;

        }

        mDebugAllocated = true;

        debugString = "";

          {

          mDebugWidth = (int)(mWidth*DEBUG_SCR_FRAC);

          mDebugHeight= (int)(mWidth*DEBUG_SCR_FRAC*DEBUG_FRAC);

          if( mDebugWidth<=0 || mDebugHeight<=0 )

            {

            int width = 100;

            mDebugWidth = (int)(width*DEBUG_SCR_FRAC);

            mDebugHeight= (int)(width*DEBUG_SCR_FRAC*DEBUG_FRAC);

            }

        debugMesh = new MeshQuad();

        debugTexture = new DistortedTexture();

        debugTexture.setTexture(debugBitmap);

        debugCanvas = new Canvas(debugBitmap);

        debugEffects = new DistortedEffects();

        debugEffects.apply( new MatrixEffectScale( new Static3D(mDebugWidth,mDebugHeight,1) ) );

        debugEffects.apply(mMoveEffect);

        mPaint = new Paint();

        mPaint.setAntiAlias(true);

        mPaint.setTextAlign(Paint.Align.CENTER);

        mPaint.setTextSize(0.7f*mDebugHeight);

        }

      mPaint.setColor(mDebugBackColor);

      debugCanvas.drawRect(0, 0, mDebugWidth, mDebugHeight, mPaint);

      mPaint.setColor(mDebugTextColor);

      debugCanvas.drawText(debugString, 0.5f*mDebugWidth, 0.75f*mDebugHeight, mPaint);

      }

    // make it equal to 3.

    // This of course introduces a delay and uses more memory, but it does not appear to have any effect

    // on speed. Maybe a slight positive effect if any!

    GLES30.glDepthMask(false);

    GLES30.glDisable(GLES30.GL_STENCIL_TEST);

    GLES30.glDisable(GLES30.GL_DEPTH_TEST);

    GLES30.glDisable(GLES30.GL_BLEND);

      {

      mQueueSize = DistortedLibrary.getQueueSize();

      }

    if( ++mCurRenderedFBO>=mQueueSize )

      mCurRenderedFBO = 0;

      if (mFirstCircle) mFirstCircle = false;

      }

      mToBeBlittedFBO=0;

      }

    if( err!=GLES30.GL_NO_ERROR )

      {

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * Make the library show Frames Per Second in the upper-left corner.

 * <p>

 */

  public void showFPS()

    int height    = (int)(mWidth*DEBUG_SCR_FRAC*DEBUG_FRAC);

    int gap       = 5;

    int textColor = 0xffffffff;

    int backColor = 0xff000000;

    showFPS(width,height,gap,textColor,backColor);

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * Make the library show Frames Per Second in the upper-left corner.

 * Set appropriate params.

 * <p>

 */

  public void showFPS(int width, int height, int gap, int textColor, int backColor)

    {

    mDebugWidth     = width;

    mDebugHeight    = height;

    mDebugGap       = gap;

    mDebugBackColor = backColor;

    mDebugTextColor = textColor;

      durations = new long[NUM_FRAMES + 1];

      currDuration = 0;

      durations[NUM_FRAMES] = NUM_FRAMES * 16;               // close to 1000/16 ~ 60

///////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * Make the library show current frame number in the upper-left corner.

 * <p>

 */

  public void showFrameNumber()

    {

    if( mDebugMode!=DEBUG_MODE_FRAME )

      {

      mDebugMode = DEBUG_MODE_FRAME;

      frameNumber = 0;

      }

    }