Esempi in C++ (Cpp) per init_frame_buffer_locked

Esempio n. 1

File: alloc_device.cpp Progetto: morristech/exyroid-sgs2-gb

static int gralloc_alloc_framebuffer_locked(alloc_device_t* dev, size_t size, int usage, buffer_handle_t* pHandle)
{
	private_module_t* m = reinterpret_cast<private_module_t*>(dev->common.module);
    
	// allocate the framebuffer
	if (m->framebuffer == NULL)
	{
		// initialize the framebuffer, the framebuffer is mapped once and forever.
		int err = init_frame_buffer_locked(m);
		if (err < 0)
		{
			return err;
		}
	}

	const uint32_t bufferMask = m->bufferMask;
	const uint32_t numBuffers = m->numBuffers;
	const size_t bufferSize = m->finfo.line_length * m->info.yres;
	if (numBuffers == 1)
	{
		// If we have only one buffer, we never use page-flipping. Instead,
		// we return a regular buffer which will be memcpy'ed to the main
		// screen when post is called.
		int newUsage = (usage & ~GRALLOC_USAGE_HW_FB) | GRALLOC_USAGE_HW_2D;
		LOGE("fallback to single buffering");
		return gralloc_alloc_buffer(dev, bufferSize, newUsage, pHandle);
	}

	if (bufferMask >= ((1LU<<numBuffers)-1))
	{
		// We ran out of buffers.
		return -ENOMEM;
	}

	int vaddr = m->framebuffer->base;
	// find a free slot
	for (uint32_t i=0 ; i<numBuffers ; i++)
	{
		if ((bufferMask & (1LU<<i)) == 0)
		{
			m->bufferMask |= (1LU<<i);
			break;
		}
		vaddr += bufferSize;
	}

	// The entire framebuffer memory is already mapped, now create a buffer object for parts of this memory
	private_handle_t* hnd = new private_handle_t(private_handle_t::PRIV_FLAGS_FRAMEBUFFER, size, vaddr,
	                                             0, dup(m->framebuffer->fd), vaddr - m->framebuffer->base);
	*pHandle = hnd;

	return 0;
}

Esempio n. 2

File: alloc_device.cpp Progetto: osmc/vero2-android-gralloc

static int gralloc_alloc_framebuffer_locked(alloc_device_t *dev, size_t size, int usage, buffer_handle_t *pHandle)
{
	private_module_t *m = reinterpret_cast<private_module_t *>(dev->common.module);

	// allocate the framebuffer
	if (m->framebuffer == NULL)
	{
		// initialize the framebuffer, the framebuffer is mapped once and forever.
		int err = init_frame_buffer_locked(m);

		if (err < 0)
		{
			return err;
		}
	}

	const uint32_t bufferMask = m->bufferMask;
	const uint32_t numBuffers = m->numBuffers;
	const size_t bufferSize = m->finfo.line_length * m->info.yres;

	if (numBuffers == 1)
	{
		// If we have only one buffer, we never use page-flipping. Instead,
		// we return a regular buffer which will be memcpy'ed to the main
		// screen when post is called.
		int newUsage = (usage & ~GRALLOC_USAGE_HW_FB) | GRALLOC_USAGE_HW_2D;
		AERR("fallback to single buffering. Virtual Y-res too small %d", m->info.yres);
		return gralloc_alloc_buffer(dev, bufferSize, newUsage, pHandle);
	}

	if (bufferMask >= ((1LU << numBuffers) - 1))
	{
		// We ran out of buffers.
		return -ENOMEM;
	}

	int vaddr = m->framebuffer->base;

	// find a free slot
	for (uint32_t i = 0 ; i < numBuffers ; i++)
	{
		if ((bufferMask & (1LU << i)) == 0)
		{
			m->bufferMask |= (1LU << i);
			break;
		}

		vaddr += bufferSize;
	}

	// The entire framebuffer memory is already mapped, now create a buffer object for parts of this memory
	private_handle_t *hnd = new private_handle_t(private_handle_t::PRIV_FLAGS_FRAMEBUFFER, usage, size, vaddr,
	        0, dup(m->framebuffer->fd), vaddr - m->framebuffer->base);
#if GRALLOC_ARM_UMP_MODULE
	hnd->ump_id = m->framebuffer->ump_id;

	/* create a backing ump memory handle if the framebuffer is exposed as a secure ID */
	if ((int)UMP_INVALID_SECURE_ID != hnd->ump_id)
	{
		hnd->ump_mem_handle = (int)ump_handle_create_from_secure_id(hnd->ump_id);

		if ((int)UMP_INVALID_MEMORY_HANDLE == hnd->ump_mem_handle)
		{
			AINF("warning: unable to create UMP handle from secure ID %i\n", hnd->ump_id);
		}
	}

#endif

#if GRALLOC_ARM_DMA_BUF_MODULE
	{
#ifdef FBIOGET_DMABUF
		struct fb_dmabuf_export fb_dma_buf;

		if (ioctl(m->framebuffer->fd, FBIOGET_DMABUF, &fb_dma_buf) == 0)
		{
			AINF("framebuffer accessed with dma buf (fd 0x%x)\n", (int)fb_dma_buf.fd);
			hnd->share_fd = fb_dma_buf.fd;
		}

#endif
	}
#endif

	*pHandle = hnd;

	return 0;
}