学步园

status_t SurfaceFlinger::readyToRun()
{
    LOGI( "SurfaceFlinger's main thread ready to run. "
            "Initializing graphics H/W...");
    // we only support one display currently
    int dpy = 0;
    {
        // initialize the main display
        GraphicPlane& plane(graphicPlane(dpy));
        DisplayHardware* const hw = new DisplayHardware(this, dpy);
        plane.setDisplayHardware(hw);
    }
    // create the shared control-block
    mServerHeap = new MemoryHeapBase(4096,
            MemoryHeapBase::READ_ONLY, "SurfaceFlinger
read-only heap");
    LOGE_IF(mServerHeap==0, "can't
create shared memory dealer");
    
    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
    LOGE_IF(mServerCblk==0, "can't
get to shared control block's address");   
    new(mServerCblk) surface_flinger_cblk_t;
    // initialize primary screen
    // (other display should be initialized in the same manner, but
    // asynchronously, as they could come and go. None of this is supported
    // yet).
    const GraphicPlane& plane(graphicPlane(dpy));
    const DisplayHardware& hw = plane.displayHardware();
    const uint32_t w = hw.getWidth();
    const uint32_t h = hw.getHeight();
    const uint32_t f = hw.getFormat();
    hw.makeCurrent();
    // initialize the shared control block

    mServerCblk->connected |= 1<<dpy;
    display_cblk_t* dcblk = mServerCblk->displays + dpy;
    memset(dcblk, 0, sizeof(display_cblk_t));
    dcblk->w = plane.getWidth();
    dcblk->h = plane.getHeight();
    dcblk->format = f;
    dcblk->orientation = ISurfaceComposer::eOrientationDefault;
    dcblk->xdpi = hw.getDpiX();
    dcblk->ydpi = hw.getDpiY();
    dcblk->fps = hw.getRefreshRate();
    dcblk->density = hw.getDensity();
    asm volatile ("":::"memory");
    // Initialize OpenGL|ES

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, 0);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
    glPixelStorei(GL_PACK_ALIGNMENT, 4); 
    glEnableClientState(GL_VERTEX_ARRAY);
    glEnable(GL_SCISSOR_TEST);
    glShadeModel(GL_FLAT);
    glDisable(GL_DITHER);
    glDisable(GL_CULL_FACE);

    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
    const uint16_t g1 = pack565(0x17,0x2f,0x17);
    const uint16_t textureData[4] = { g0, g1, g1, g0 };
    glGenTextures(1, &mWormholeTexName);
    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, textureData);
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrthof(0, w, h, 0, 0, 1);
   LayerDim::initDimmer(this, w, h);
    mReadyToRunBarrier.open();
    /*
     * We're now ready to accept clients...
     */
    // start boot animation
    property_set("ctl.start", "bootanim");   
    return NO_ERROR;
}

DisplayHardware::DisplayHardware(
        const sp<SurfaceFlinger>& flinger,
        uint32_t dpy)
    : DisplayHardwareBase(flinger, dpy)
{
    init(dpy);
}

void DisplayHardware::init(uint32_t dpy)
{
    mNativeWindow = new FramebufferNativeWindow();

    ...

static inline int framebuffer_open(const struct hw_module_t* module, 
        struct framebuffer_device_t** device) {
    return module->methods->open(module, 
            GRALLOC_HARDWARE_FB0, (struct hw_device_t**)device);
}
static inline int gralloc_open(const struct hw_module_t* module, 
        struct alloc_device_t** device) {
    return module->methods->open(module, 
            GRALLOC_HARDWARE_GPU0, (struct hw_device_t**)device);
}