I assume you are uploading texture then drawing it just after. This can be very slow as it stalls the GPU. Try doing double or triple-buffering so that the texture you upload with texImage2D is only drawn at next or next-next frame.
Regards, On Sun, Oct 31, 2010 at 14:13, 袁堂夫 <[email protected]> wrote: > Hi,how are you? > We use Opengl 2.0 to develop a video programme on android with nexus one. > We find that the fuction glTexImage2D is too slow,but we write a > shader programme accord to the sample GL2JNILib. > I guess the GPU is not working, why it happened? how to fix it? > help me,please.Thank you very much. > ----------------------some important code--------------------------- > VideoView(Context context) > { > super(context); > // m_Activity=(hello)context; > m_AndroidHolder = getHolder(); > m_AndroidHolder.addCallback(this); > m_AndroidHolder.setType(SurfaceHolder.SURFACE_TYPE_GPU); > m_AndroidHolder.setFormat(PixelFormat.RGB_565); > . > . > .} > ------------------------------ > public void initEGL() > { > mEGL = (EGL10)EGLContext.getEGL(); > mGLDisplay = mEGL.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY); > int[] curGLVersion = new int[2]; > mEGL.eglInitialize(mGLDisplay, curGLVersion); > ConfigChooser configChooser= new ConfigChooser(5, 6, 5, 0, 0, 0); > mGLConfig = configChooser.chooseConfig(mEGL,mGLDisplay); > mGLSurface = mEGL.eglCreateWindowSurface(mGLDisplay, > mGLConfig,m_View.m_AndroidHolder, null); > int[] attrib_list = {0x3098, 2, EGL10.EGL_NONE }; > mGLContext = mEGL.eglCreateContext(mGLDisplay, mGLConfig, > EGL10.EGL_NO_CONTEXT, attrib_list); > mEGL.eglMakeCurrent(mGLDisplay, mGLSurface, mGLSurface, mGLContext); > } > ------------------------------ > glActiveTexture ( GL_TEXTURE0 ); > glBindTexture ( GL_TEXTURE_2D, userData.textureId[0] ); > glUniform1i ( userData.samplerLocY, 0); > glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); > glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); > glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, > GL_CLAMP_TO_EDGE); > glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, > GL_CLAMP_TO_EDGE); > glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width, height, 0, > GL_LUMINANCE, GL_UNSIGNED_BYTE, pict->data[0]); > > -- > 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 > -- 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
