Android的Eclipse我怎样才能保存呈现GLsurfaceView为* .png图像

Question

嗨，我正在拍照效果应用程序。 因此，我从相机加载位图（我保存原始图像，然后加载）glsurfaceview和应用一些效果，但我找不到像图像文件* .png或* .jpg保存更改的图像的方法。

我看起来几乎到处都是，但它们不适用于我的应用程序。当我尝试保存时总是强行关闭。

这是我的代码。

我找到了一些保存代码，但我无法工作。

main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" > 

    <android.opengl.GLSurfaceView 
     android:id="@+id/effectsview" 
     android:layout_width="fill_parent" 
     android:layout_height="0dp" 
     android:layout_weight="0.05" /> 

    <GridLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" > 
    </GridLayout> 

     <GridLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:columnCount="1" > 

<Button 
    android:id="@+id/button1" 
    android:layout_width="159dp" 
    android:layout_height="wrap_content" 
    android:layout_column="0" 

    android:layout_row="0" 
    android:onClick="saverenderedimage" 
     android:layout_gravity="left|top" 
    android:text="Save Image" /> 

<Button 
    android:id="@+id/Button01" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_gravity="left|top" 
    android:onClick="gomain" 
    android:text="Go Main Menu without saving" /> 

<Button 
    android:id="@+id/button2" 
    android:layout_width="156dp" 
    android:layout_column="0" 
    android:layout_gravity="right|top" 
    android:layout_row="0" 
    android:onClick="sharedialog" 
    android:text="Share" /> 

     </GridLayout> 

</LinearLayout> 

效果选择和施用的.java

public class Effects_selevtor extends Activity implements GLSurfaceView.Renderer { 


     i declared some strings ints (deleted) 

     String imagefilepath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/filename.jpg"; 

     int mCurrentEffect; 

     public void setCurrentEffect(int effect) { 
      mCurrentEffect = effect; 
     } 


     public void onCreate(Bundle savedInstanceState) { 
      this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_effects_selevtor); 
      mEffectView = (GLSurfaceView) findViewById(R.id.effectsview); 
      mEffectView.setEGLContextClientVersion(2); 
      mEffectView.setRenderer(this); 
      mEffectView.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY); 
      mCurrentEffect = R.id.none; 

      Uri imageFileUri = Uri.parse("file:///sdcard/filename.jpg"); 
      Intent cameraIntent = new Intent(
        android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
      cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, imageFileUri); 
      startActivityForResult(cameraIntent, 2); 



     } 



     public void gomain(View View) { 

      startActivity(new Intent(Effects_selevtor.this,HelloEffects.class)); 

     } 


     @Override 
     protected void onActivityResult(int requestCode, int resultCode, Intent data) { 



     if (requestCode == 2) { 


      try { 

       if (bitmap != null) { 
        bitmap.recycle(); 
       } 



       GLES20.glGenTextures(2, mTextures, 0); 

       // Load input bitmap 
       Bitmap bitmap = BitmapFactory.decodeFile(imagefilepath); 
       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(); 

       Toast.makeText(getApplicationContext(), "Touch your phone's Menu button to select effects ", Toast.LENGTH_SHORT).show(); 


      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 
     } 


     public static Bitmap SavePixels(int x, int y, int w, int h, GL10 gl) 
     { 
      int b[]=new int[w*(y+h)]; 
      int bt[]=new int[w*h]; 
      IntBuffer ib=IntBuffer.wrap(b); 
      ib.position(0); 
      gl.glReadPixels(x, 0, w, y+h, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, ib); 

      for(int i=0, k=0; i<h; i++, k++) 
      {//remember, that OpenGL bitmap is incompatible with Android bitmap 
      //and so, some correction need.   
       for(int j=0; j<w; j++) 
       { 
        int pix=b[i*w+j]; 
        int pb=(pix>>16)&0xff; 
        int pr=(pix<<16)&0x00ff0000; 
        int pix1=(pix&0xff00ff00) | pr | pb; 
        bt[(h-k-1)*w+j]=pix1; 
       } 
      } 


      Bitmap sb=Bitmap.createBitmap(bt, w, h, Bitmap.Config.ARGB_8888); 
      return sb; 
     } 

     public static void SavePNG(int x, int y, int w, int h, String name, GL10 gl) 
     { 
      Bitmap bmp=SavePixels(x,y,w,h,gl); 
      try 
      { 
       FileOutputStream fos=new FileOutputStream("/sdcard/CamWay/"+name); 
       bmp.compress(CompressFormat.PNG, 100, fos); 
       try 
       { 
        fos.flush(); 
       } 
       catch (IOException e) 
       { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
       try 
       { 
        fos.close(); 
       } 
       catch (IOException e) 
       { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 

      } 
      catch (FileNotFoundException e) 
      { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      }  
     } 


      public void saverenderedimage(View view) { 


//i tried save but it not worked i don't understand what should i declare for "gl" 

       SavePNG(0, 0,mEffectView.getWidth() , mEffectView.getHeight(), "CamWay.png", gl); 
      // SavePNG(0, 0,mEffectView.getWidth() , mEffectView.getHeight(), imagefilepath, gl); 
       startActivity(new Intent(Effects_selevtor.this,HelloEffects.class)); 

      } 


     public void OnClickselector(View arg0) { 


     startActivity(new Intent(Effects_selevtor.this,HelloEffects.class)); 
    } 


     private void loadTextures() { 
      // Generate textures 
      GLES20.glGenTextures(2, mTextures, 0); 


      // Load input bitmap 
      Bitmap bitmap = BitmapFactory.decodeFile(imagefilepath); 


      // Load input bitmap 

      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(); 
     } 

     private void initEffect() { 
      EffectFactory effectFactory = mEffectContext.getFactory(); 
      if (mEffect != null) { 
       mEffect.release(); 
      } 
      /** 
      * Initialize the correct effect based on the selected menu/action item 
      */ 
      switch (mCurrentEffect) { 

       case R.id.none: 
        break; 



       case R.id.vignette: 
        mEffect = effectFactory.createEffect(
          EffectFactory.EFFECT_VIGNETTE); 
        mEffect.setParameter("scale", .5f); 
        break; 

    //and a lot effect more i deleted for readability 

       default: 
        break; 

      } 
     } 

     private void applyEffect() { 
      mEffect.apply(mTextures[0], mImageWidth, mImageHeight, mTextures[1]); 
     } 

     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]); 
      } 
     } 

     @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); 
      } 


     } 

Answer 1

我实现通过交叉编译libpng并使用它通过JNI保存GLSurfaceView为PNG。