AsyncTask all i get is a blank/black texture screen
AsyncTask all i get is a blank/black texture screen
am using Open GL ES 2.0 to perform certain effects on bitmaps, now if i load a bitmap directly on UI thread it takes alot of time, hence im using AsyncTask....
Problem:-
When i use AsyncTask,all i get is a blank/black texture screen,without asynctask it display the bitmap after 7-8 seconds depending on the size.
Following is the code:-
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Note: Text content in the code blocks is automatically word-wrapped
public class TinypostFilters extends Activity implements GLSurfaceView.Renderer {
private Uri myuri;
int dw;
int dh;
private GLSurfaceView mEffectView;
private int[] mTextures = new int[2];
private EffectContext mEffectContext;
private Effect mEffect;
private TextureRenderer mTexRenderer = new TextureRenderer();
private int mImageWidth;
private int mImageHeight;
private boolean mInitialized = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tinypost_filters);
/*
* Initialize renderer and set it to only render when explicitly
* requested with the RENDERMODE_WHEN_DIRTY option.
*/
mEffectView = (GLSurfaceView) findViewById(R.id.effectsview);
mEffectView.setEGLContextClientVersion(2);
mEffectView.setRenderer(this);
mEffectView.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
mCurrentEffect = R.id.none;
}
@Override
public void onDrawFrame(GL10 gl) {
if (!mInitialized) {
// Only need to do this once
mEffectContext = EffectContext.createWithCurrentGlContext();
mTexRenderer.init();
loadTextures();
mInitialized = true;
}
if (mCurrentEffect != R.id.none) {
// if an effect is chosen initialize it and apply it to the texture
initEffect();
//applyEffect();
}
renderResult();
}
@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
if (mTexRenderer != null) {
mTexRenderer.updateViewSize(width, height);
}
}
@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
}
private void loadTextures() {
// Generate textures
GLES20.glGenTextures(2, mTextures, 0);
// Load input bitmap
try {
//load Bitmap from previous activity
myuri = Uri.parse(getIntent().getStringExtra("uri"));
Bitmap bitmap=new BitmapWorkerTask().execute(myuri).get();
mImageWidth = bitmap.getWidth();
mImageHeight = bitmap.getHeight();
mTexRenderer.updateTextureSize(mImageWidth, mImageHeight);
// Upload to texture
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextures[0]);
GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);
// Set texture parameters
GLToolbox.initTexParams();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void renderResult() {
if (mCurrentEffect != R.id.none) {
// if no effect is chosen, just render the original bitmap
mTexRenderer.renderTexture(mTextures[1]);
} else {
// render the result of applyEffect()
mTexRenderer.renderTexture(mTextures[0]);
}
}
//this method decodes the bitmap
public Bitmap decodeSampledBitmapFromResource(Uri uri, int reqWidth,
int reqHeight) {
Display currentDisplay = getWindowManager().getDefaultDisplay();
Point size = new Point();
currentDisplay.getSize(size);
dw = size.x;
dh = size.y;
// Load up the image's dimensions not the image itself
BitmapFactory.Options bmpFactoryOptions = new BitmapFactory.Options();
bmpFactoryOptions.inJustDecodeBounds = true;
Bitmap bmp = null;
try {
bmp = BitmapFactory.decodeStream(getContentResolver()
.openInputStream(uri), null, bmpFactoryOptions);
} catch (Exception e) {
}
int widthRatio = (int) Math.ceil(bmpFactoryOptions.outWidth
/ (float) reqWidth);
int heightRatio = (int) Math.ceil(bmpFactoryOptions.outHeight
/ (float) reqHeight);
if (heightRatio > 1 && widthRatio > 1) {
if (heightRatio > widthRatio) {
bmpFactoryOptions.inSampleSize = heightRatio;
} else {
bmpFactoryOptions.inSampleSize = widthRatio;
}
bmpFactoryOptions.inJustDecodeBounds = false;
try {
bmp = BitmapFactory.decodeStream(getContentResolver()
.openInputStream(uri), null, bmpFactoryOptions);
} catch (Exception e) {
}
}
return bmp;
}
class BitmapWorkerTask extends AsyncTask<Uri, Void, Bitmap> {
Uri uri;
@Override
protected Bitmap doInBackground(Uri... imageuri) {
uri = imageuri[0];
return decodeSampledBitmapFromResource(uri, dw, dh);
}
}
}
public class TinypostFilters extends Activity implements GLSurfaceView.Renderer {
private Uri myuri;
int dw;
int dh;
private GLSurfaceView mEffectView;
private int[] mTextures = new int[2];
private EffectContext mEffectContext;
private Effect mEffect;
private TextureRenderer mTexRenderer = new TextureRenderer();
private int mImageWidth;
private int mImageHeight;
private boolean mInitialized = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tinypost_filters);
/*
* Initialize renderer and set it to only render when explicitly
* requested with the RENDERMODE_WHEN_DIRTY option.
*/
mEffectView = (GLSurfaceView) findViewById(R.id.effectsview);
mEffectView.setEGLContextClientVersion(2);
mEffectView.setRenderer(this);
mEffectView.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
mCurrentEffect = R.id.none;
}
@Override
public void onDrawFrame(GL10 gl) {
if (!mInitialized) {
// Only need to do this once
mEffectContext = EffectContext.createWithCurrentGlContext();
mTexRenderer.init();
loadTextures();
mInitialized = true;
}
if (mCurrentEffect != R.id.none) {
// if an effect is chosen initialize it and apply it to the texture
initEffect();
//applyEffect();
}
renderResult();
}
@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
if (mTexRenderer != null) {
mTexRenderer.updateViewSize(width, height);
}
}
@Override
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
}
private void loadTextures() {
// Generate textures
GLES20.glGenTextures(2, mTextures, 0);
// Load input bitmap
try {
//load Bitmap from previous activity
myuri = Uri.parse(getIntent().getStringExtra("uri"));
Bitmap bitmap=new BitmapWorkerTask().execute(myuri).get();
mImageWidth = bitmap.getWidth();
mImageHeight = bitmap.getHeight();
mTexRenderer.updateTextureSize(mImageWidth, mImageHeight);
// Upload to texture
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextures[0]);
GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);
// Set texture parameters
GLToolbox.initTexParams();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void renderResult() {
if (mCurrentEffect != R.id.none) {
// if no effect is chosen, just render the original bitmap
mTexRenderer.renderTexture(mTextures[1]);
} else {
// render the result of applyEffect()
mTexRenderer.renderTexture(mTextures[0]);
}
}
//this method decodes the bitmap
public Bitmap decodeSampledBitmapFromResource(Uri uri, int reqWidth,
int reqHeight) {
Display currentDisplay = getWindowManager().getDefaultDisplay();
Point size = new Point();
currentDisplay.getSize(size);
dw = size.x;
dh = size.y;
// Load up the image's dimensions not the image itself
BitmapFactory.Options bmpFactoryOptions = new BitmapFactory.Options();
bmpFactoryOptions.inJustDecodeBounds = true;
Bitmap bmp = null;
try {
bmp = BitmapFactory.decodeStream(getContentResolver()
.openInputStream(uri), null, bmpFactoryOptions);
} catch (Exception e) {
}
int widthRatio = (int) Math.ceil(bmpFactoryOptions.outWidth
/ (float) reqWidth);
int heightRatio = (int) Math.ceil(bmpFactoryOptions.outHeight
/ (float) reqHeight);
if (heightRatio > 1 && widthRatio > 1) {
if (heightRatio > widthRatio) {
bmpFactoryOptions.inSampleSize = heightRatio;
} else {
bmpFactoryOptions.inSampleSize = widthRatio;
}
bmpFactoryOptions.inJustDecodeBounds = false;
try {
bmp = BitmapFactory.decodeStream(getContentResolver()
.openInputStream(uri), null, bmpFactoryOptions);
} catch (Exception e) {
}
}
return bmp;
}
class BitmapWorkerTask extends AsyncTask<Uri, Void, Bitmap> {
Uri uri;
@Override
protected Bitmap doInBackground(Uri... imageuri) {
uri = imageuri[0];
return decodeSampledBitmapFromResource(uri, dw, dh);
}
}
}I've tried refactoring here and there,but without any success...any help is appreciated,thanks!