UPDATE 2: I've understand I have to create an EGLContext in the first rendering thread and share it with the second one, as explained here http://comments.gmane.org/gmane.comp.handhelds.android.devel/130165
But it isn't enough... At this link http://groups.google.com/group/android-platform/browse_thread/thread/a9931ef61a5648c5 there is a topic where it is explained how to achieve texture sharing (see the answer on 30th May), using EGLImage Object and glEGLImageTargetTexture2DOES() function. The second one is present in Android inside GLES11Ext class, but what about the EGLImage... I can't find it anywhere. It seems that Android provides an older EGL specs or simply a partial EGL specs. Am I wrong? In this case, is there any other way to achieve texture sharing? Thanks in advance! Paolo On 15 Giu, 18:36, Paolo <[email protected]> wrote: > UPDATE 1: > > I have been able to show two different GLsurfaceview showing one > simple square for every surface with OpenGL and it works. > Then I applied a texture on one square and it works. > > Now I'd like to share textures within the second square on the second > GLSurfaceView, but it seems a bit complicated. > > Is there anyone who knows how to work it out? > > Here my code... it's bad code, but it just for testing... > > private static int id_text = -1; //id texture > > public void onSurfaceCreated(GL10 gl, EGLConfig config) { > gl.glShadeModel(GL10.GL_SMOOTH); > gl.glClearColor(0, 0, 0, 0); > > gl.glClearDepthf(1.0f); > gl.glEnable(GL10.GL_DEPTH_TEST); > gl.glDepthFunc(GL10.GL_LEQUAL); > > gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, > GL10.GL_NICEST); > > //TEXTTURE > gl.glEnable(GL11.GL_TEXTURE_2D); > > // create vertex buffer for texture > textureBuffer = setTextureVertex(); > > //if I am the first glsurfaceview (it means texture > sharing == false) I create my texture, otherwise i get the shared one. > if(!textureSharing) > //id_text is the texture id generated, see below > methods > id_text = GlRenderer.loadTexture(gl, context, > R.drawable.texture); > > gl.glDisable(GL11.GL_TEXTURE_2D); > > } > > public void onDrawFrame(GL10 gl) { > gl.glClear(GL10.GL_COLOR_BUFFER_BIT | > GL10.GL_DEPTH_BUFFER_BIT); > > gl.glMatrixMode(GL10.GL_MODELVIEW); > gl.glLoadIdentity(); > > //if my texture id isn't generated yet, nop, else I > use it do for drawing > if (id_text != -1) { > // draw quad > gl.glPushMatrix(); > gl.glColor4f(1, 1, 1, 1); > // create texture > gl.glEnable(GL10.GL_TEXTURE_2D); > gl.glBindTexture(GL10.GL_TEXTURE_2D, id_text); > > gl.glTranslatef(0, 0, -4f); > > gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); > gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY); > > gl.glVertexPointer(3, GL10.GL_FLOAT, 0, quadBuffer); > gl.glTexCoordPointer(2, GL11.GL_FLOAT, 0, > textureBuffer); > gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4); > gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); > > // Disable the vertices buffer. > gl.glDisableClientState(GL11.GL_VERTEX_ARRAY); > gl.glDisableClientState(GL11.GL_TEXTURE_COORD_ARRAY); > > gl.glDisable(GL11.GL_TEXTURE_2D); > gl.glPopMatrix(); > } > } > > public void onSurfaceChanged(GL10 gl, int width, int height) { > // avoid division by zero > if (height == 0) > height = 1; > > // draw on the entire screen > gl.glViewport(0, 0, width, height); > // setup projection matrix > gl.glMatrixMode(GL10.GL_PROJECTION); > gl.glLoadIdentity(); > GLU.gluPerspective(gl, 45.0f, (float)width / (float)height, > 1.0f, > 100.0f); > } > > /* > * Generate a new ID for texture > */ > private static int newTextureID(GL10 gl) { > int[] temp = new int[1]; > gl.glGenTextures(1, temp, 0); > return temp[0]; > } > > /* > * Load Texture > */ > private static int loadTexture(GL10 gl, Context context, int > resource) { > > int id = id_text; > BitmapFactory.Options opts = new BitmapFactory.Options(); > opts.inScaled = false; > Bitmap temp = > BitmapFactory.decodeResource(context.getResources(), resource, opts); > Bitmap texture = Bitmap.createBitmap(temp, 0, 0, > temp.getWidth(), temp.getHeight()); > > id = newTextureID(gl); //generate the ID texture > > gl.glBindTexture(GL10.GL_TEXTURE_2D, id); > > // setup texture parameters > gl.glTexParameterx(GL10.GL_TEXTURE_2D, > GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); > gl.glTexParameterx(GL10.GL_TEXTURE_2D, > GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR); > GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, texture, 0); > > temp.recycle(); > texture.recycle(); > > return id; > > } > > What happen? > The first glsurfaceview shows the correct square textured, the second > one show only a white square.... > > My goal is share only the ID and the to call glBindTexture(), but > maybe I'm wrong. > > Please help me to undestand! Thanks > > Paolo > > On 8 Giu, 20:37, Paolo <[email protected]> wrote: > > > > > Hi there, > > > as the Object of this topic... is it possible to create two different > > OpenGL Contexts in the same activity? I mean creating two different > > glsurfaceviews, where every of them use a different EGLConfig and > > Renderer. > > > And also... what about texture? Can I share texture through the two > > OGL Context? > > > I need to use it either with 2.1, 2.2. 2.3 or 3.0 with tablets for a > > dual indipendent 3D window. > > > Thanks in advance > > > Paolo -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
