C++ DRM_IOCTL函数代码示例

drm_public int drmModeAddFB2WithModifiers(int fd, uint32_t width,
		uint32_t height, uint32_t pixel_format, const uint32_t bo_handles[4],
		const uint32_t pitches[4], const uint32_t offsets[4],
		const uint64_t modifier[4], uint32_t *buf_id, uint32_t flags)
{
	struct drm_mode_fb_cmd2 f;
	int ret;

	memclear(f);
	f.width  = width;
	f.height = height;
	f.pixel_format = pixel_format;
	f.flags = flags;
	memcpy(f.handles, bo_handles, 4 * sizeof(bo_handles[0]));
	memcpy(f.pitches, pitches, 4 * sizeof(pitches[0]));
	memcpy(f.offsets, offsets, 4 * sizeof(offsets[0]));
	if (modifier)
		memcpy(f.modifier, modifier, 4 * sizeof(modifier[0]));

	if ((ret = DRM_IOCTL(fd, DRM_IOCTL_MODE_ADDFB2, &f)))
		return ret;

	*buf_id = f.fb_id;
	return 0;
}

int drmModeSetPlane(int fd, uint32_t plane_id, uint32_t crtc_id,
		    uint32_t fb_id, uint32_t flags,
		    uint32_t crtc_x, uint32_t crtc_y,
		    uint32_t crtc_w, uint32_t crtc_h,
		    uint32_t src_x, uint32_t src_y,
		    uint32_t src_w, uint32_t src_h)

{
	struct drm_mode_set_plane s;

	s.plane_id = plane_id;
	s.crtc_id = crtc_id;
	s.fb_id = fb_id;
	s.flags = flags;
	s.crtc_x = crtc_x;
	s.crtc_y = crtc_y;
	s.crtc_w = crtc_w;
	s.crtc_h = crtc_h;
	s.src_x = src_x;
	s.src_y = src_y;
	s.src_w = src_w;
	s.src_h = src_h;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETPLANE, &s);
}

int drmModeDetachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
{
	struct drm_mode_mode_cmd res;

	memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
	res.connector_id = connector_id;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_DETACHMODE, &res);
}

int drmModeConnectorSetProperty(int fd, uint32_t connector_id, uint32_t property_id,
			     uint64_t value)
{
	struct drm_mode_connector_set_property osp;

	osp.connector_id = connector_id;
	osp.prop_id = property_id;
	osp.value = value;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETPROPERTY, &osp);
}

int drmModeMoveCursor(int fd, uint32_t crtcId, int x, int y)
{
	struct drm_mode_cursor arg;

	arg.flags = DRM_MODE_CURSOR_MOVE;
	arg.crtc_id = crtcId;
	arg.x = x;
	arg.y = y;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_CURSOR, &arg);
}

int drmModeDirtyFB(int fd, uint32_t bufferId,
		   drmModeClipPtr clips, uint32_t num_clips)
{
	struct drm_mode_fb_dirty_cmd dirty = { 0 };

	dirty.fb_id = bufferId;
	dirty.clips_ptr = VOID2U64(clips);
	dirty.num_clips = num_clips;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_DIRTYFB, &dirty);
}

int drmModeSetCursor(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width, uint32_t height)
{
	struct drm_mode_cursor arg;

	arg.flags = DRM_MODE_CURSOR_BO;
	arg.crtc_id = crtcId;
	arg.width = width;
	arg.height = height;
	arg.handle = bo_handle;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_CURSOR, &arg);
}

int drmModeObjectSetProperty(int fd, uint32_t object_id, uint32_t object_type,
			     uint32_t property_id, uint64_t value)
{
	struct drm_mode_obj_set_property prop;

	prop.value = value;
	prop.prop_id = property_id;
	prop.obj_id = object_id;
	prop.obj_type = object_type;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_OBJ_SETPROPERTY, &prop);
}

int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
		    uint32_t flags, void *user_data)
{
	struct drm_mode_crtc_page_flip flip;

	flip.fb_id = fb_id;
	flip.crtc_id = crtc_id;
	flip.user_data = VOID2U64(user_data);
	flip.flags = flags;
	flip.reserved = 0;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip);
}

int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
			uint16_t *red, uint16_t *green, uint16_t *blue)
{
	struct drm_mode_crtc_lut l;

	l.crtc_id = crtc_id;
	l.gamma_size = size;
	l.red = VOID2U64(red);
	l.green = VOID2U64(green);
	l.blue = VOID2U64(blue);

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETGAMMA, &l);
}

int drmModeSetCursor2(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width, uint32_t height, int32_t hot_x, int32_t hot_y)
{
	struct drm_mode_cursor2 arg;

	arg.flags = DRM_MODE_CURSOR_BO;
	arg.crtc_id = crtcId;
	arg.width = width;
	arg.height = height;
	arg.handle = bo_handle;
	arg.hot_x = hot_x;
	arg.hot_y = hot_y;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_CURSOR2, &arg);
}

drm_public int drmModePageFlipTarget(int fd, uint32_t crtc_id, uint32_t fb_id,
			  uint32_t flags, void *user_data,
			  uint32_t target_vblank)
{
	struct drm_mode_crtc_page_flip_target flip_target;

	memclear(flip_target);
	flip_target.fb_id = fb_id;
	flip_target.crtc_id = crtc_id;
	flip_target.user_data = VOID2U64(user_data);
	flip_target.flags = flags;
	flip_target.sequence = target_vblank;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip_target);
}

int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
                   uint32_t x, uint32_t y, uint32_t *connectors, int count,
		   drmModeModeInfoPtr mode)
{
	struct drm_mode_crtc crtc;

	crtc.x             = x;
	crtc.y             = y;
	crtc.crtc_id       = crtcId;
	crtc.fb_id         = bufferId;
	crtc.set_connectors_ptr = VOID2U64(connectors);
	crtc.count_connectors = count;
	if (mode) {
	  memcpy(&crtc.mode, mode, sizeof(struct drm_mode_modeinfo));
	  crtc.mode_valid = 1;
	} else
	  crtc.mode_valid = 0;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETCRTC, &crtc);
}

int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
                 uint8_t bpp, uint32_t pitch, uint32_t bo_handle,
		 uint32_t *buf_id)
{
	struct drm_mode_fb_cmd f;
	int ret;

	f.width  = width;
	f.height = height;
	f.pitch  = pitch;
	f.bpp    = bpp;
	f.depth  = depth;
	f.handle = bo_handle;

	if ((ret = DRM_IOCTL(fd, DRM_IOCTL_MODE_ADDFB, &f)))
		return ret;

	*buf_id = f.fb_id;
	return 0;
}

int drmModeRmFB(int fd, uint32_t bufferId)
{
	return DRM_IOCTL(fd, DRM_IOCTL_MODE_RMFB, &bufferId);


}