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POIs Opengl Development GPU Dependant?
 

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  1. POIs Opengl Development GPU Dependant?
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    <p>I am developing an android application in opengl ES2.0.In this Application I used to draw multiple lines and circles by touch event in GL surfaceView.</p> <p>As opengl depends on GPU, Currently it works fine in Google Nexus 7(ULP GeForce). </p> <p>In Samsung Galaxy Note 2(MALI 400MP) I'm trying to draw more than one line, but it clears the previous line and draw current line as new.</p> <p>In Sony Xperia Neo V(Adreno 205) I'm trying to draw a new line, it crashes the surface as shown in below image.<img src="https://i.stack.imgur.com/XY7dy.jpg" alt="enter image description here"></p> <p>Is it possible to make it work on all devices or do I need to write code for Individual GPU?</p> <hr> <h2>Source code</h2> <h3>MainActivity.java</h3> <pre><code>//in OnCreate method of my activity, i set the glsurfaceview and renderer final ActivityManager activityManager = ( ActivityManager ) getSystemService( Context.ACTIVITY_SERVICE ); final ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo( ); final boolean supportsEs2 = ( configurationInfo.reqGlEsVersion &gt;= 0x20000 || Build.FINGERPRINT.startsWith( "generic" ) ); if( supportsEs2 ) { Log.i( "JO", "configurationInfo.reqGlEsVersion:" + configurationInfo.reqGlEsVersion + "supportsEs2:" + supportsEs2 ); // Request an OpenGL ES 2.0 compatible context. myGlsurfaceView.setEGLContextClientVersion( 2 ); final DisplayMetrics displayMetrics = new DisplayMetrics( ); getWindowManager( ).getDefaultDisplay( ).getMetrics( displayMetrics ); // Set the renderer to our demo renderer, defined below. myRenderer = new MyRenderer( this, myGlsurfaceView ); myGlsurfaceView.setRenderer( myRenderer, displayMetrics.density ); myGlsurfaceView.setRenderMode( GLSurfaceView.RENDERMODE_CONTINUOUSLY ); MyGLSurfaceView.java //in this im getting the coordinates of my touch on the glSurfaceView to draw the line and //passing those points to the renderer class public MyGLsurfaceview( Context context ) { super( context ); Log.i( "JO", "MyGLsurfaceview1" ); } public MyGLsurfaceview( Context context, AttributeSet attrs ) { super( context, attrs ); con = context; mActivity = new MainActivity( ); mActivity.myGlsurfaceView = this; Log.i( "JO", "MyGLsurfaceview2" ); } public void setRenderer( MyRenderer renderer, float density ) { Log.i( "JO", "setRenderer" ); myRenderer = renderer; myDensity = density; mGestureDetector = new GestureDetector( con, mGestureListener ); super.setRenderer( renderer ); setRenderMode( GLSurfaceView.RENDERMODE_CONTINUOUSLY ); } @Override public boolean onTouchEvent( MotionEvent ev ) { boolean retVal = mGestureDetector.onTouchEvent( ev ); if( myline ) { switch ( ev.getAction( ) ) { case MotionEvent.ACTION_DOWN: isLUp = false; if( count == 1 ) { dx = ev.getX( ); dy = ev.getY( ); dx = ( dx / ( getWidth( ) / 2 ) ) - 1; dy = 1 - ( dy / ( getHeight( ) / 2 ) ); firstX = dx; firstY = dy; } else if( count == 2 ) { ux = ev.getX( ); uy = ev.getY( ); ux = ( ux / ( getWidth( ) / 2 ) ) - 1; uy = 1 - ( uy / ( getHeight( ) / 2 ) ); secondX = ux; secondY = uy; myRenderer.dx = firstX; myRenderer.dy = firstY; myRenderer.ux = secondX; myRenderer.uy = secondY; midX = ( firstX + secondX ) / 2; midY = ( firstY + secondY ) / 2; Log.e( "JO", "Line:firstX" + firstX + "firstY" + firstY ); lp = new LinePoints( firstX, firstY, secondX, secondY, midX, midY ); lineArray.add( lp ); myRenderer.isNewClick = false; myRenderer.isEnteredAngle = false; myRenderer.myline = true; myRenderer.mycircle = false; myRenderer.mydashedline = false; myRenderer.eraseCircle = false; myRenderer.eraseLine = false; myRenderer.eraseSelCir = false; myRenderer.angle = angle; myRenderer.length = length; requestRender( ); count = 0; } count++; break; case MotionEvent.ACTION_MOVE: isLUp = true; break; case MotionEvent.ACTION_UP: if( isLUp ) { ux = ev.getX( ); uy = ev.getY( ); ux = ( ux / ( getWidth( ) / 2 ) ) - 1; uy = 1 - ( uy / ( getHeight( ) / 2 ) ); Log.i( "JO", "line2:" + ux + "," + uy ); secondX = ux; secondY = uy; myRenderer.dx = firstX; myRenderer.dy = firstY; myRenderer.ux = secondX; myRenderer.uy = secondY; midX = ( firstX + secondX ) / 2; midY = ( firstY + secondY ) / 2; Log.e( "JO", "Line:firstX" + firstX + "firstY" + firstY ); lp = new LinePoints( firstX, firstY, secondX, secondY, midX, midY ); lineArray.add( lp ); myRenderer.isNewClick = false; myRenderer.isEnteredAngle = false; myRenderer.myline = true; myRenderer.mycircle = false; myRenderer.mydashedline = false; myRenderer.mysnaptoedge = false; myRenderer.mysnaptoMiddle = false; myRenderer.eraseCircle = false; myRenderer.eraseLine = false; myRenderer.eraseSelCir = false; count = 1; requestRender( ); } break; } } } } </code></pre> <h3>MyRenderer.java</h3> <pre><code>//renderer class to render the line to the glsurfaceview Lines line; public MyRenderer( MainActivity mainActivity, MyGLsurfaceview myGlsurfaceView ) { Log.i( "JO", "MyRenderer" ); this.main = mainActivity; myGlsurface = myGlsurfaceView; } public void onDrawFrame( GL10 gl ) { line.draw( dx, dy, ux, uy ); } @Override public void onSurfaceCreated( GL10 gl, EGLConfig config ) { Log.i( "JO", "onSurfaceCreated" ); // Set the background frame color GLES20.glClearColor( 0.0f, 0.0f, 0.0f, 1.0f ); // Create the GLText glText = new GLText( main.getAssets( ) ); // Load the font from file (set size + padding), creates the texture // NOTE: after a successful call to this the font is ready for // rendering! glText.load( "Roboto-Regular.ttf", 14, 2, 2 ); // Create Font (Height: 14 // Pixels / X+Y Padding // 2 Pixels) // enable texture + alpha blending GLES20.glEnable( GLES20.GL_BLEND ); GLES20.glBlendFunc( GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA ); } @Override public void onSurfaceChanged( GL10 gl, int width, int height ) { // Adjust the viewport based on geometry changes, // such as screen rotation GLES20.glViewport( 0, 0, width, height ); ratio = ( float ) width / height; width_surface = width; height_surface = height; /* * // this projection matrix is applied to object coordinates // in the * onDrawFrame() method Matrix.frustumM(mProjMatrix, 0, -ratio, ratio, * -1, 1, 3, 7); */ // Take into account device orientation if( width &gt; height ) { Matrix.frustumM( mProjMatrix, 0, -ratio, ratio, -1, 1, 1, 10 ); } else { Matrix.frustumM( mProjMatrix, 0, -1, 1, -1 / ratio, 1 / ratio, 1, 10 ); } // Save width and height this.width = width; // Save Current Width this.height = height; // Save Current Height int useForOrtho = Math.min( width, height ); // TODO: Is this wrong? Matrix.orthoM( mVMatrix, 0, -useForOrtho / 2, useForOrtho / 2, -useForOrtho / 2, useForOrtho / 2, 0.1f, 100f ); } </code></pre> <h3>Line.java</h3> <pre><code>//Line class to draw line public class Lines { final String vertexShaderCode = "attribute vec4 vPosition;" + "void main() {" + " gl_Position = vPosition;" + "}"; final String fragmentShaderCode = "precision mediump float;" + "uniform vec4 vColor;" + "void main() {" + " gl_FragColor = vColor;" + "}"; final FloatBuffer vertexBuffer; final int mProgram; int mPositionHandle; int mColorHandle; // number of coordinates per vertex in this array final int COORDS_PER_VERTEX = 3; float lineCoords[] = new float[6]; final int vertexCount = lineCoords.length / COORDS_PER_VERTEX; final int vertexStride = COORDS_PER_VERTEX * 4; // bytes per vertex // Set color with red, green, blue and alpha (opacity) values float lcolor[] = { 1.0f, 1.0f, 1.0f, 1.0f }; public Lines( ) { // initialize vertex byte buffer for shape coordinates ByteBuffer bb = ByteBuffer.allocateDirect( // (number of coordinate values * 4 bytes per float) lineCoords. length * 4 ); // use the device hardware's native byte order bb.order( ByteOrder.nativeOrder( ) ); // create a floating point buffer from the ByteBuffer vertexBuffer = bb.asFloatBuffer( ); // prepare shaders and OpenGL program int vertexShader = MyRenderer.loadShader( GLES20.GL_VERTEX_SHADER, vertexShaderCode ); int fragmentShader = MyRenderer.loadShader( GLES20.GL_FRAGMENT_SHADER, fragmentShaderCode ); mProgram = GLES20.glCreateProgram( ); // create empty OpenGL Program GLES20.glAttachShader( mProgram, vertexShader ); // add the vertex shader // to program GLES20.glAttachShader( mProgram, fragmentShader ); // add the fragment // shader to program GLES20.glLinkProgram( mProgram ); // create OpenGL program executables } public void draw( float dX, float dY, float uX, float uY ) { lineCoords[0] = dX; lineCoords[1] = dY; lineCoords[2] = 0.0f; lineCoords[3] = uX; lineCoords[4] = uY; lineCoords[5] = 0.0f; Log.i( "JO", "lineCoords:" + lineCoords[0] + "," + lineCoords[1] + "," + lineCoords[3] + "," + lineCoords[4] ); vertexBuffer.put( lineCoords ); vertexBuffer.position( 0 ); // Add program to OpenGL environment GLES20.glUseProgram( mProgram ); // get handle to vertex shader's vPosition member mPositionHandle = GLES20.glGetAttribLocation( mProgram, "vPosition" ); // Enable a handle to the triangle vertices GLES20.glEnableVertexAttribArray( mPositionHandle ); // Prepare the triangle coordinate data GLES20.glVertexAttribPointer( mPositionHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false, vertexStride, vertexBuffer ); // get handle to fragment shader's vColor member mColorHandle = GLES20.glGetUniformLocation( mProgram, "vColor" ); // Set color for drawing the triangle GLES20.glUniform4fv( mColorHandle, 1, lcolor, 0 ); GLES20.glLineWidth( 3 ); // Draw the triangle GLES20.glDrawArrays( GLES20.GL_LINES, 0, vertexCount ); // Disable vertex array GLES20.glDisableVertexAttribArray( mPositionHandle ); } } </code></pre>
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    1. USdeiva
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    1. COHow about you show us some of your drawing code? The idea of OpenGL(-ES) is to be device **independent**, so you either found several driver bugs, or you're doing something very wrong.
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      1. POIs Opengl Development GPU Dependant?
      1. USdatenwolf
    2. COYou can see my code [here](http://tuxbalaji.wordpress.com/2013/06/19/draw-a-line-using-opengles2-0-by-touch-event-in-android/)
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    3. COHow about putting the relevant code in the question so it will still be around if the external link dies.
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      1. USGrimmy
 

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