C++ eglCreatePbufferSurface函数代码示例

bool EGLPlatform::initSurface()
{
	// create the surface
#if USE_PBUFFER
	EGLint attribs[] = {
		EGL_WIDTH, width,
		EGL_HEIGHT, height,
		EGL_TEXTURE_FORMAT, EGL_TEXTURE_RGBA,
		EGL_TEXTURE_TARGET, EGL_TEXTURE_2D,
		EGL_NONE
	};
	this->surface = eglCreatePbufferSurface(this->display, this->config, attribs);
#elif USE_PIXMAP
	EGLint attribs[] = {EGL_NONE};
	this->surface = eglCreatePixmapSurface(this->display, this->config, this->pixmap, attribs);
#else
	EGLint attribs[] = {EGL_NONE};
	this->surface = eglCreateWindowSurface(this->display, this->config, this->window, NULL);
#endif
	if(this->surface == EGL_NO_SURFACE)
	{
		printf("Error: EGL surface creation failed (error code: 0x%x)\n", eglGetError());
		return false;
	}
	
	return true;
}

EglContext::EglContext(EglContext* shared) :
m_display (EGL_NO_DISPLAY),
m_context (EGL_NO_CONTEXT),
m_surface (EGL_NO_SURFACE),
m_config  (NULL)
{
    // Get the initialized EGL display
    m_display = getInitializedDisplay();

    // Get the best EGL config matching the default video settings
    m_config = getBestConfig(m_display, VideoMode::getDesktopMode().bitsPerPixel, ContextSettings());
    updateSettings();

    // Note: The EGL specs say that attrib_list can be NULL when passed to eglCreatePbufferSurface,
    // but this is resulting in a segfault. Bug in Android?
    EGLint attrib_list[] = {
        EGL_WIDTH, 1,
        EGL_HEIGHT,1,
        EGL_NONE
    };

    m_surface = eglCheck(eglCreatePbufferSurface(m_display, m_config, attrib_list));

    // Create EGL context
    createContext(shared);
}

EGLSurface EGLDisplayOpenVG::createPbufferSurface(const IntSize& size, const EGLConfig& config, EGLint* errorCode)
{
    const EGLint attribList[] = {
        EGL_WIDTH, size.width(),
        EGL_HEIGHT, size.height(),
        EGL_NONE
    };
    EGLSurface surface = eglCreatePbufferSurface(m_display, config, attribList);

    if (errorCode)
        *errorCode = eglGetError();
    else
        ASSERT_EGL_NO_ERROR();

    if (surface == EGL_NO_SURFACE)
        return EGL_NO_SURFACE;

    EGLint surfaceConfigId;
    EGLBoolean success = eglGetConfigAttrib(m_display, config, EGL_CONFIG_ID, &surfaceConfigId);
    ASSERT(success == EGL_TRUE);
    ASSERT(surfaceConfigId != EGL_BAD_ATTRIBUTE);

    ASSERT(!m_surfaceConfigIds.contains(surface));
    m_surfaceConfigIds.set(surface, surfaceConfigId);
    return surface;
}

bool GlesBox::createSurface(uint32_t width, uint32_t height, uint64_t native_windows_id) {
  if (core_->surface_ != nullptr) {
    eglDestroySurface(core_->surface_, core_->surface_);
    core_->surface_ = nullptr;
  }

  // Create a surface
  core_->width_ = width;
  core_->height_ = height;
  EGLint PBufAttribs[] = { 
    EGL_WIDTH, (EGLint)core_->width_,
    EGL_HEIGHT, (EGLint)core_->height_,
    EGL_LARGEST_PBUFFER, EGL_TRUE,
    EGL_NONE
  };
  if (native_windows_id != 0) {//attach on native windows
    EGLNativeWindowType handle = reinterpret_cast<EGLNativeWindowType>(native_windows_id);
    core_->surface_ = eglCreateWindowSurface(core_->display_, core_->config_, handle, NULL);
  }
  else // off-render
    core_->surface_ = eglCreatePbufferSurface(core_->display_, core_->config_, PBufAttribs);

  if (core_->surface_ == EGL_NO_SURFACE) {
    LOGE("eglCreateWindowSurface fail: %d.", eglGetError());
    return false;
  }

  return true;
}

JNIEXPORT jlong JNICALL Java_org_lwjgl_opengles_EGL_neglCreatePbufferSurface(JNIEnv *env, jclass clazz, jlong dpy_ptr, jlong config_ptr, jlong attrib_list) {
    EGLDisplay dpy = (EGLDisplay)(intptr_t)dpy_ptr;
    EGLConfig config = (EGLConfig)(intptr_t)config_ptr;
    const EGLint *attrib_list_address = (EGLint *)(intptr_t)attrib_list;

    return (intptr_t)eglCreatePbufferSurface(dpy, config, attrib_list_address);
}

static void
make_pbuffer(int width, int height)
{
   static const EGLint config_attribs[] = {
      EGL_RED_SIZE, 8,
      EGL_GREEN_SIZE, 8,
      EGL_BLUE_SIZE, 8,
      EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE,
      EGL_NONE
   };
   EGLint pbuf_attribs[] = {
      EGL_WIDTH, width,
      EGL_HEIGHT, height,
      EGL_TEXTURE_FORMAT, EGL_TEXTURE_RGB,
      EGL_TEXTURE_TARGET, EGL_TEXTURE_2D,
      EGL_NONE
   };
   EGLConfig config;
   EGLint num_configs;

   if (!eglChooseConfig(dpy, config_attribs, &config, 1, &num_configs) ||
       !num_configs) {
      printf("Error: couldn't get an EGL visual config for pbuffer\n");
      exit(1);
   }

   ctx_pbuf = eglCreateContext(dpy, config, EGL_NO_CONTEXT, NULL );
   surf_pbuf = eglCreatePbufferSurface(dpy, config, pbuf_attribs);
   if (surf_pbuf == EGL_NO_SURFACE) {
      printf("failed to allocate pbuffer\n");
      exit(1);
   }
}

static gboolean
make_dummy_surface (ClutterBackendWayland *backend_wayland)
{
  static const EGLint attrs[] = {
    EGL_WIDTH, 1,
    EGL_HEIGHT, 1,
    EGL_RENDERABLE_TYPE, _COGL_RENDERABLE_BIT,
    EGL_NONE };
  EGLint num_configs;

  eglGetConfigs(backend_wayland->edpy,
                &backend_wayland->egl_config, 1, &num_configs);
  if (num_configs < 1)
    return FALSE;

  backend_wayland->egl_surface =
    eglCreatePbufferSurface(backend_wayland->edpy,
                            backend_wayland->egl_config,
                            attrs);

  if (backend_wayland->egl_surface == EGL_NO_SURFACE)
    return FALSE;

  return TRUE;
}

/* EGLSurface eglCreatePbufferSurface ( EGLDisplay dpy, EGLConfig config, const EGLint *attrib_list ) */
static jobject
android_eglCreatePbufferSurface
  (JNIEnv *_env, jobject _this, jobject dpy, jobject config, jintArray attrib_list_ref, jint offset) {
    jint _exception = 0;
    const char * _exceptionType = NULL;
    const char * _exceptionMessage = NULL;
    EGLSurface _returnValue = (EGLSurface) 0;
    EGLDisplay dpy_native = (EGLDisplay) fromEGLHandle(_env, egldisplayGetHandleID, dpy);
    EGLConfig config_native = (EGLConfig) fromEGLHandle(_env, eglconfigGetHandleID, config);
    bool attrib_list_sentinel = false;
    EGLint *attrib_list_base = (EGLint *) 0;
    jint _remaining;
    EGLint *attrib_list = (EGLint *) 0;

    if (!attrib_list_ref) {
        _exception = 1;
        _exceptionType = "java/lang/IllegalArgumentException";
        _exceptionMessage = "attrib_list == null";
        goto exit;
    }
    if (offset < 0) {
        _exception = 1;
        _exceptionType = "java/lang/IllegalArgumentException";
        _exceptionMessage = "offset < 0";
        goto exit;
    }
    _remaining = _env->GetArrayLength(attrib_list_ref) - offset;
    attrib_list_base = (EGLint *)
        _env->GetPrimitiveArrayCritical(attrib_list_ref, (jboolean *)0);
    attrib_list = attrib_list_base + offset;
    attrib_list_sentinel = false;
    for (int i = _remaining - 1; i >= 0; i--)  {
        if (attrib_list[i] == EGL_NONE){
            attrib_list_sentinel = true;
            break;
        }
    }
    if (attrib_list_sentinel == false) {
        _exception = 1;
        _exceptionType = "java/lang/IllegalArgumentException";
        _exceptionMessage = "attrib_list must contain EGL_NONE!";
        goto exit;
    }

    _returnValue = eglCreatePbufferSurface(
        (EGLDisplay)dpy_native,
        (EGLConfig)config_native,
        (EGLint *)attrib_list
    );

exit:
    if (attrib_list_base) {
        _env->ReleasePrimitiveArrayCritical(attrib_list_ref, attrib_list_base,
            JNI_ABORT);
    }
    if (_exception) {
        jniThrowException(_env, _exceptionType, _exceptionMessage);
    }
    return toEGLHandle(_env, eglsurfaceClass, eglsurfaceConstructor, _returnValue);
}

SkANGLEGLContext::SkANGLEGLContext()
    : fContext(EGL_NO_CONTEXT)
    , fDisplay(EGL_NO_DISPLAY)
    , fSurface(EGL_NO_SURFACE) {

    EGLint numConfigs;
    static const EGLint configAttribs[] = {
        EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
        EGL_RED_SIZE, 8,
        EGL_GREEN_SIZE, 8,
        EGL_BLUE_SIZE, 8,
        EGL_ALPHA_SIZE, 8,
        EGL_NONE
    };

    fDisplay = GetD3DEGLDisplay(EGL_DEFAULT_DISPLAY);
    if (EGL_NO_DISPLAY == fDisplay) {
        SkDebugf("Could not create EGL display!");
        return;
    }

    EGLint majorVersion;
    EGLint minorVersion;
    eglInitialize(fDisplay, &majorVersion, &minorVersion);

    EGLConfig surfaceConfig;
    eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs);

    static const EGLint contextAttribs[] = {
        EGL_CONTEXT_CLIENT_VERSION, 2,
        EGL_NONE
    };
    fContext = eglCreateContext(fDisplay, surfaceConfig, NULL, contextAttribs);


    static const EGLint surfaceAttribs[] = {
        EGL_WIDTH, 1,
        EGL_HEIGHT, 1,
        EGL_NONE
    };

    fSurface = eglCreatePbufferSurface(fDisplay, surfaceConfig, surfaceAttribs);

    eglMakeCurrent(fDisplay, fSurface, fSurface, fContext);

    SkAutoTUnref<const GrGLInterface> gl(GrGLCreateANGLEInterface());
    if (NULL == gl.get()) {
        SkDebugf("Could not create ANGLE GL interface!\n");
        this->destroyGLContext();
        return;
    }
    if (!gl->validate()) {
        SkDebugf("Could not validate ANGLE GL interface!\n");
        this->destroyGLContext();
        return;
    }

    this->init(gl.detach());
}

int main(int argc, char *argv[])
{
	GLint width, height;
	EGLint pbuffer_attribute_list[] = {
		EGL_WIDTH, 256,
		EGL_HEIGHT, 256,
		EGL_LARGEST_PBUFFER, EGL_TRUE,
		EGL_NONE
	};
	const EGLint config_attribute_list[] = {
		EGL_RED_SIZE, 8,
		EGL_GREEN_SIZE, 8,
		EGL_BLUE_SIZE, 8,
		EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
		EGL_DEPTH_SIZE, 8,
		EGL_NONE
	};
	const EGLint context_attribute_list[] = {
		EGL_CONTEXT_CLIENT_VERSION, 2,
		EGL_NONE
	};
	EGLDisplay display;
	EGLConfig config;
	EGLint num_config;
	EGLContext context;
	EGLSurface surface;
	int i;

	display = get_display();

	/* get an appropriate EGL frame buffer configuration */
	ECHK(eglChooseConfig(display, config_attribute_list, &config, 1, &num_config));
	DEBUG_MSG("num_config: %d", num_config);

	/* create an EGL rendering context */
	ECHK(context = eglCreateContext(display, config, EGL_NO_CONTEXT, context_attribute_list));
	ECHK(surface = eglCreatePbufferSurface(display, config, pbuffer_attribute_list));

	ECHK(eglQuerySurface(display, surface, EGL_WIDTH, &width));
	ECHK(eglQuerySurface(display, surface, EGL_HEIGHT, &height));

	DEBUG_MSG("PBuffer: %dx%d", width, height);

	/* connect the context to the surface */
	ECHK(eglMakeCurrent(display, surface, surface, context));
	GCHK(glFlush());

	for (i = 0; ; i++) {
		if (test_compiler(i)) {
			break;
		}
	}

	ECHK(eglDestroySurface(display, surface));
	ECHK(eglTerminate(display));
}

    /*
     * Sets up EGL.  Creates a 1280x720 pbuffer, which is large enough to
     * cause a rapid and highly visible memory leak if we fail to discard it.
     */
    bool eglSetup() {
        static const EGLint kConfigAttribs[] = {
                EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
                EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
                EGL_RED_SIZE, 8,
                EGL_GREEN_SIZE, 8,
                EGL_BLUE_SIZE, 8,
                EGL_NONE
        };
        static const EGLint kContextAttribs[] = {
                EGL_CONTEXT_CLIENT_VERSION, 2,
                EGL_NONE
        };
        static const EGLint kPbufferAttribs[] = {
                EGL_WIDTH, 1280,
                EGL_HEIGHT, 720,
                EGL_NONE
        };

        //usleep(25000);

        mEglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
        if (mEglDisplay == EGL_NO_DISPLAY) {
            ALOGW("eglGetDisplay failed: 0x%x", eglGetError());
            return false;
        }

        EGLint majorVersion, minorVersion;
        if (!eglInitialize(mEglDisplay, &majorVersion, &minorVersion)) {
            ALOGW("eglInitialize failed: 0x%x", eglGetError());
            return false;
        }

        EGLConfig eglConfig;
        EGLint numConfigs = 0;
        if (!eglChooseConfig(mEglDisplay, kConfigAttribs, &eglConfig,
                1, &numConfigs)) {
            ALOGW("eglChooseConfig failed: 0x%x", eglGetError());
            return false;
        }

        mEglSurface = eglCreatePbufferSurface(mEglDisplay, eglConfig,
                kPbufferAttribs);
        if (mEglSurface == EGL_NO_SURFACE) {
            ALOGW("eglCreatePbufferSurface failed: 0x%x", eglGetError());
            return false;
        }

        mEglContext = eglCreateContext(mEglDisplay, eglConfig, EGL_NO_CONTEXT,
                kContextAttribs);
        if (mEglContext == EGL_NO_CONTEXT) {
            ALOGW("eglCreateContext failed: 0x%x", eglGetError());
            return false;
        }

        return true;
    }

void EglManager::createPBufferSurface() {
    LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY,
                        "usePBufferSurface() called on uninitialized GlobalContext!");

    if (mPBufferSurface == EGL_NO_SURFACE) {
        EGLint attribs[] = {EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE};
        mPBufferSurface = eglCreatePbufferSurface(mEglDisplay, mEglConfig, attribs);
    }
}

void * PthreadMain (void * param)
{
	Logger::Info("[PthreadMain] param = %p", param);

	Thread * t = (Thread*)param;

	if(t->needCopyContext)
    {
    	EGLConfig localConfig;
    	bool ret = GetConfig(Thread::currentDisplay, localConfig);
		Logger::Info("[PthreadMain] GetConfig returned = %d", ret);

    	if(ret)
    	{
        	EGLint contextAttrs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
        	t->localContext = eglCreateContext(t->currentDisplay, localConfig, t->currentContext, contextAttrs);
//        	t->localContext = eglCreateContext(t->currentDisplay, localConfig, EGL_NO_CONTEXT, contextAttrs);
    	}

    	if(t->localContext == EGL_NO_CONTEXT)
    	{
    		Logger::Error("[PthreadMain] Can't create local context");
    	}

    	GLint surfAttribs[] =
    	{
    			EGL_HEIGHT, 768,
    			EGL_WIDTH, 1024,
    			EGL_NONE
    	};

        
    	EGLSurface readSurface = eglCreatePbufferSurface(t->currentDisplay, localConfig, surfAttribs);
//    	EGLSurface drawSurface = eglCreatePbufferSurface(t->currentDisplay, localConfig, surfAttribs);

        //TODO: set context
//		bool ret2 = eglMakeCurrent(t->currentDisplay, t->currentDrawSurface, t->currentReadSurface, t->localContext);
		bool ret2 = eglMakeCurrent(t->currentDisplay, readSurface, readSurface, t->localContext);
		Logger::Info("[PthreadMain] set eglMakeCurrent returned = %d", ret2);
    }

	t->state = Thread::STATE_RUNNING;
	t->msg(t);

    if(t->needCopyContext)
	{
        //TODO: Restore context
		bool ret = eglMakeCurrent(t->currentDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
		Logger::Info("[PthreadMain] restore eglMakeCurrent returned = %d", ret);
	}

	t->state = Thread::STATE_ENDED;
	t->Release();

	pthread_exit(0);
}

static EGLBoolean
egl_manager_create_pbuffer(struct egl_manager *eman, const EGLint *attrib_list)
{
   eman->pbuf = eglCreatePbufferSurface(eman->dpy, eman->conf, attrib_list);
   if (eman->pbuf == EGL_NO_SURFACE) {
      printf("eglCreatePbufferSurface() failed\n");
      return EGL_FALSE;
   }

   return EGL_TRUE;
}

WEAK int halide_opengl_create_context(void *user_context) {
    if (eglGetCurrentContext() != EGL_NO_CONTEXT)
        return 0;

    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
    if (display == EGL_NO_DISPLAY || !eglInitialize(display, 0, 0)) {
        error(user_context) << "Could not initialize EGL display: " << eglGetError();
        return 1;
    }

    EGLint attribs[] = {
        EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
        EGL_RED_SIZE, 8,
        EGL_GREEN_SIZE, 8,
        EGL_BLUE_SIZE, 8,
        EGL_ALPHA_SIZE, 8,
        EGL_NONE,
    };
    EGLConfig config;
    int numconfig;
    eglChooseConfig(display, attribs, &config, 1, &numconfig);
    if (numconfig != 1) {
        error(user_context) << "eglChooseConfig(): config not found: "
                            << eglGetError() << " - " << numconfig;
        return -1;
    }

    EGLint context_attribs[] = {
        EGL_CONTEXT_CLIENT_VERSION, 2,
        EGL_NONE
    };
    EGLContext context = eglCreateContext(display, config, EGL_NO_CONTEXT,
                                          context_attribs);
    if (context == EGL_NO_CONTEXT) {
        error(user_context) << "Error: eglCreateContext failed: " << eglGetError();
        return -1;
    }

    EGLint surface_attribs[] = {
        EGL_WIDTH, 1,
        EGL_HEIGHT, 1,
        EGL_NONE
    };
    EGLSurface surface = eglCreatePbufferSurface(display, config,  surface_attribs);
    if (surface == EGL_NO_SURFACE) {
        error(user_context) << "Error: Could not create EGL window surface: " << eglGetError();
        return -1;
    }

    eglMakeCurrent(display, surface, surface, context);
    return 0;
}