Hi everyone. I want to use glReadPixels() to make new texture from current displayed image. But alpha value returned from glReadPixels() is always 255, so I can't make texture with transparency.
Here is a part of my code. (in GLSurfaceView.Renderer's onSurfaceCreated()) gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f); gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_ALPHA_BITS); object0.draw(gl); object1.draw(gl); x = y = 0; texture_width = texture_height = 128; ByteBuffer pixels = ByteBuffer.allocate(texture_width * texture_height * 4); pixels.order(ByteOrder.nativeOrder()); gl.glReadPixels (x,y,texture_width,texture_height,GL10.GL_RGBA,GL10.GL_UNSIGNED_BYTE, pixels); int[] textureNo = new int[1]; gl.glGenTextures(1, textureNo, 0); gl.glBindTexture(GL10.GL_TEXTURE_2D, textureNo[0]); gl.glTexImage2D(GL10.GL_TEXTURE_2D, 0, GL10.GL_RGBA, ts, ts, 0, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, pixels); //end RGB value is OK, but Alpha value is always 255, regardless of the 4th argument of glClearColor and object's transparent region is filled with glClearColor()'s RGB value. Is there any way to make texture with transparency from current displayed image? Thanks for your help. -- 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
