OpenGLES 1.1 with FrameBuffer/ColorBuffer/DepthBuffer for Android with NDK r7b

Question

在閱讀了NDK文檔以及我所有關於OpenGLES的書之後，我都碰到了一堵牆。我試圖將我的iOS OpenGLES設置爲Android NDK R7及更高版本，主要是爲了獲得編碼時忽略的深度緩衝區。

問題是我鬆開了一些物體上的紋理，當我啓用顏色緩衝區，如下所示，深度緩衝區不工作時，我發送對象到背景。

我使用OGLES 1.1 FFP和NDK R7或以上

這裏是我的初始化代碼： -

int32_t ES1Renderer::initRenderer() { 

    EGLint lFormat, lNumConfigs, lErrorResult; 
    EGLConfig lConfig; 

    const EGLint lAttributes[] = { 
     EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT, 
     EGL_BLUE_SIZE, 5, EGL_GREEN_SIZE, 6, EGL_RED_SIZE, 5, 
     EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 
     EGL_NONE 
    }; 

    mDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY); 
    if (mDisplay == EGL_NO_DISPLAY) goto ERROR; 
    if (!eglInitialize(mDisplay, NULL, NULL)) goto ERROR; 

    if(!eglChooseConfig(mDisplay, lAttributes, &lConfig, 1, 
     &lNumConfigs) || (lNumConfigs <= 0)) goto ERROR; 

    if (!eglGetConfigAttrib(mDisplay, lConfig, 
     EGL_NATIVE_VISUAL_ID, &lFormat)) goto ERROR; 
    ANativeWindow_setBuffersGeometry(mApplication->window, 0, 0, 
     lFormat); 


    mSurface = eglCreateWindowSurface(mDisplay, lConfig, 
     mApplication->window, NULL); 
    if (mSurface == EGL_NO_SURFACE) goto ERROR; 
    mContext = eglCreateContext(mDisplay, lConfig, EGL_NO_CONTEXT, 
     NULL); 
    if (mContext == EGL_NO_CONTEXT) goto ERROR; 


    if (!eglMakeCurrent(mDisplay, mSurface, mSurface, mContext) 
    || !eglQuerySurface(mDisplay, mSurface, EGL_WIDTH, &mWidth) 
    || !eglQuerySurface(mDisplay, mSurface, EGL_HEIGHT, &mHeight) 
    || (mWidth <= 0) || (mHeight <= 0)) goto ERROR; 

    //Get the default FrameBuffer and bind it 
    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0); 

    glGenRenderbuffersOES(1, &colorRenderbuffer); 
    glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer); 
    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, colorRenderbuffer); 

    glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &mWidth); 
    glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &mHeight); 

    glGenRenderbuffersOES(1, &depthRenderbuffer); 
    glBindRenderbufferOES(GL_RENDERBUFFER_OES, depthRenderbuffer); 
    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_DEPTH_COMPONENT16_OES, mWidth, mHeight); 
    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, depthRenderbuffer); 


    { 
     const GLfloat   matAmbient[] = {1.0, 1.0, 1.0, 1.0}; 
     const GLfloat   matDiffuse[] = {1.0, 1.0, 1.0, 1.0}; 
     const GLfloat   lightShininess = 20.0; 

     glEnable(GL_COLOR_MATERIAL); 
     glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, matAmbient); 
     glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, matDiffuse); 
     glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, lightShininess); 
    } 

    glViewport(0, 0, mWidth, mHeight); 

    glEnable (GL_DEPTH_TEST); 
    glDepthFunc(GL_LEQUAL ); 
    glDepthMask(GL_TRUE); 

    glEnable (GL_CULL_FACE); 
    glShadeModel(GL_SMOOTH); 

    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); 
    glHint(GL_GENERATE_MIPMAP_HINT  , GL_NICEST); 
    glHint(GL_LINE_SMOOTH_HINT   , GL_NICEST); 
    glHint(GL_POINT_SMOOTH_HINT   , GL_NICEST); 
    glHint(GL_FOG_HINT     , GL_NICEST); 

    glClearColor(0.0f, 0.0f, 0.0f, 1.0f); 

    glMatrixMode(GL_PROJECTION); 

    glOrthof(-1.0,     //LEFT 
        1.0,     //RIGHT 
        -1.0 * mHeight/mWidth, //BOTTOM 
        1.0 * mHeight/mWidth, //TOP 
        -2.0,     //NEAR 
        100.0);    //FAR 

    glMatrixMode(GL_MODELVIEW); 
} 

這裏是我的渲染代碼：

int32_t ES1Renderer::render() { 

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 

    /* 
    RENDERING GOES HERE THE REMOVED FOR EXAMPLE 
    */ 

    glBindRenderbufferOES(GL_RENDERBUFFER_OES, colorRenderbuffer); 

    if (eglSwapBuffers(mDisplay, mSurface) != EGL_TRUE) { 
     return 0; 
    } 

    return 1; 
} 

Answer 1

確定後指針從Sylvain Ratabouil（查看他的書和頁面，如果你想加快NDK7的速度）在Android NDK 7上設置OGLES。我不需要Gen和綁定緩衝區，因爲它們是自動處理的當設置EGL表面時。他建議增加這樣的： -

EGL_DEPTH_SIZE, 16, EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 

到

const EGLint lAttributes[] = { EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT, 
     EGL_BLUE_SIZE, 5, EGL_GREEN_SIZE, 6, EGL_RED_SIZE, 5, 
     EGL_DEPTH_SIZE, 16, EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 
     EGL_SURFACE_TYPE, EGL_WINDOW_BIT, EGL_NONE }; 

那固定我的深度緩存，注意檢查EGL狀態確保它是支持的。以下是我使用的完整安裝實現： -

int32_t ES1Renderer::initialiseRenderer() { 

    EGLint lFormat, lNumConfigs, lErrorResult; 
    EGLConfig lConfig; 

    const EGLint lAttributes[] = { EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT, 
     EGL_BLUE_SIZE, 5, EGL_GREEN_SIZE, 6, EGL_RED_SIZE, 5, 
     EGL_DEPTH_SIZE, 16, EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 
     EGL_SURFACE_TYPE, EGL_WINDOW_BIT, EGL_NONE }; 

    mDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY); 
    if (mDisplay == EGL_NO_DISPLAY) 
     goto ERROR; 
    if (!eglInitialize(mDisplay, NULL, NULL)) 
     goto ERROR; 

    if (!eglChooseConfig(mDisplay, lAttributes, &lConfig, 1, &lNumConfigs) 
     || (lNumConfigs <= 0)) 
    goto ERROR; 

    if (!eglGetConfigAttrib(mDisplay, lConfig, EGL_NATIVE_VISUAL_ID, &lFormat)) 
    goto ERROR; 
    ANativeWindow_setBuffersGeometry(mApplication->window, 0, 0, lFormat); 

    mSurface = eglCreateWindowSurface(mDisplay, lConfig, mApplication->window, 
     NULL); 
    if (mSurface == EGL_NO_SURFACE) 
    goto ERROR; 
    mContext = eglCreateContext(mDisplay, lConfig, EGL_NO_CONTEXT, NULL); 
    if (mContext == EGL_NO_CONTEXT) 
    goto ERROR; 

    if (!eglMakeCurrent(mDisplay, mSurface, mSurface, mContext) 
     || !eglQuerySurface(mDisplay, mSurface, EGL_WIDTH, &mWidth) 
     || !eglQuerySurface(mDisplay, mSurface, EGL_HEIGHT, &mHeight) 
     || (mWidth <= 0) || (mHeight <= 0)) 
    goto ERROR; 

{ 
    const GLfloat matAmbient[] = { 1.0, 1.0, 1.0, 1.0 }; 
    const GLfloat matDiffuse[] = { 1.0, 1.0, 1.0, 1.0 }; 
    const GLfloat lightShininess = 20.0; 

    glEnable(GL_COLOR_MATERIAL); 
    glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, matAmbient); 
    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, matDiffuse); 
    glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, lightShininess); 
} 

glLoadIdentity(); 

#ifdef ORTHOGANAL_PROJECTION 

glViewport(0, 0, mWidth, mHeight); 
#endif 

    glEnable (GL_DEPTH_TEST); 
    glDepthFunc(GL_LEQUAL ); 
    glDepthMask(GL_TRUE); 

    glEnable (GL_CULL_FACE); 
    //glShadeModel(GL_SMOOTH); 

    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); 
    glHint(GL_GENERATE_MIPMAP_HINT  , GL_NICEST); 
    glHint(GL_LINE_SMOOTH_HINT   , GL_NICEST); 
    glHint(GL_POINT_SMOOTH_HINT   , GL_NICEST); 
    glHint(GL_FOG_HINT     , GL_NICEST); 

    glClearColor(0.0f, 0.0f, 0.0f, 1.0f); 

    glMatrixMode(GL_PROJECTION); 

    glEnable(GL_NORMALIZE); 
    glEnable(GL_DEPTH_TEST); 
    glDisable(GL_CULL_FACE); 
    //glShadeModel(GL_FLAT); 

    #ifdef ORTHOGANAL_PROJECTION 

glOrthof(-1.0, //LEFT 
     1.0, //RIGHT 
     -1.0 * mHeight/mWidth, //BOTTOM 
     1.0 * mHeight/mWidth, //TOP 
     -2.0, //NEAR 
     100.0); //FAR 


    #else 

{ 
    GLfloat mWidthf = mWidth; 
    GLfloat mHeightf = mHeight; 

    const GLfloat zNear = 0.1; 
    const GLfloat zFar = 1000.0; 
    const GLfloat fieldOfView = 60.0; 

    GLfloat size = zNear * tanf(DEGREES_TO_RADIANS(fieldOfView)/2.0); 

    glFrustumf(-size, size, -size/(mWidthf/mHeightf), 
      size/(mWidthf/mHeightf), zNear, zFar); 

    glViewport(0, 0, mWidthf, mHeightf); 
} 
    #endif 

    glMatrixMode(GL_MODELVIEW); 
} 

渲染代碼與上面相同。