C++ (Cpp) IDirectFBSurface::SetPorterDuff示例

示例#1

static IDirectFBSurface *
_dfb_surface_from_data(IDirectFB *dfb, int w, int h, void *data)
{
   IDirectFBSurface *s;
   DFBSurfaceDescription desc;
   DFBResult r;

   desc.flags = (DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT |
		 DSDESC_PIXELFORMAT | DSDESC_PREALLOCATED);
   desc.caps = DSCAPS_PREMULTIPLIED;
   desc.width = w;
   desc.height = h;
   desc.preallocated[0].data = data;
   desc.preallocated[0].pitch = w * 4;
   desc.preallocated[1].data = NULL;
   desc.preallocated[1].pitch = 0;
   desc.pixelformat = DSPF_ARGB;
   r = dfb->CreateSurface(dfb, &desc, &s);
   if (r != DFB_OK)
     {
	ERR("Cannot create DirectFB surface: %s",
		     DirectFBErrorString(r));
	return NULL;
     }

   s->SetPorterDuff(s, DSPD_SRC_OVER);

   return s;
}

示例#2

文件： surface.c 项目： uwitty/mruby-directfb

static mrb_value surface_set_porter_duff(mrb_state *mrb, mrb_value self)
{
    IDirectFBSurface* surface = mrb_directfb_surface(mrb, self);
    DFBResult ret = -1;
    if (surface != NULL) {
        mrb_int rule;
        mrb_get_args(mrb, "i", &rule);
        ret = surface->SetPorterDuff(surface, rule);
    }
    return mrb_fixnum_value(ret);
}