src/libds/subcompositor.c

   1 #include "libds/log.h"
   2
   3 #include "subcompositor.h"
   4 #include "surface.h"
   5
   6 #define SUBCOMPOSITOR_VERSION 1
   7
   8 static void subcompositor_bind(struct wl_client *client, void *data,
   9         uint32_t version, uint32_t id);
  10
  11 bool
  12 ds_subcompositor_init(struct ds_subcompositor *subcomp,
  13         struct wl_display *display)
  14 {
  15     subcomp->global = wl_global_create(display, &wl_subcompositor_interface,
  16             SUBCOMPOSITOR_VERSION, subcomp, subcompositor_bind);
  17     if (!subcomp->global) {
  18         ds_log_errno(DS_ERR, "Could not create global");
  19         return false;
  20     }
  21
  22     return true;
  23 }
  24
  25 void
  26 ds_subcompositor_finish(struct ds_subcompositor *subcomp)
  27 {
  28     wl_global_destroy(subcomp->global);
  29 }
  30
  31 static void
  32 subcompositor_handle_destroy(struct wl_client *client,
  33         struct wl_resource *resource)
  34 {
  35     wl_resource_destroy(resource);
  36 }
  37
  38 static void
  39 subcompositor_handle_get_subsurface(struct wl_client *client,
  40         struct wl_resource *resource, uint32_t id,
  41         struct wl_resource *surface_resource,
  42         struct wl_resource *parent_resource)
  43 {
  44     struct ds_surface *surface, *parent;
  45
  46     surface = ds_surface_from_resource(surface_resource);
  47     parent = ds_surface_from_resource(parent_resource);
  48     if (surface == parent) {
  49         ds_inf("ds_surface(%p) cannot be its own parent", surface);
  50         wl_resource_post_error(resource,
  51                 WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
  52                 "%d: wl_surface@%d cannot be its own parent",
  53                 id, wl_resource_get_id(surface_resource));
  54         return;
  55     }
  56
  57     if (ds_surface_is_subsurface(surface)) {
  58         ds_inf("ds_surface(%p) is already a sub-surface", surface);
  59         wl_resource_post_error(resource,
  60                 WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
  61                 "%d: wl_surface@%d is already a sub-surface",
  62                 id, wl_resource_get_id(surface_resource));
  63         return;
  64     }
  65
  66     if (ds_surface_is_ancestor_of(surface, parent)) {
  67         ds_inf("ds_surface(%p) is an ancestor of given parent(%p)",
  68                 surface, parent);
  69         wl_resource_post_error(resource,
  70                 WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
  71                 "%d: wl_surface@%d is an ancestor of parent",
  72                 id, wl_resource_get_id(surface_resource));
  73         return;
  74     }
  75
  76     ds_subsurface_create(resource, surface, parent,
  77             wl_resource_get_version(resource), id);
  78 }
  79
  80 static const struct wl_subcompositor_interface subcompositor_impl =
  81 {
  82     .destroy = subcompositor_handle_destroy,
  83     .get_subsurface = subcompositor_handle_get_subsurface,
  84 };
  85
  86 static void
  87 subcompositor_bind(struct wl_client *client, void *data,
  88         uint32_t version, uint32_t id)
  89 {
  90     struct ds_subcompositor *subcomp = data;
  91     struct wl_resource *resource;
  92
  93     resource = wl_resource_create(client, &wl_subcompositor_interface, 1, id);
  94     if (resource == NULL) {
  95         wl_client_post_no_memory(client);
  96         return;
  97     }
  98
  99     wl_resource_set_implementation(resource, &subcompositor_impl,
 100             subcomp, NULL);
 101 }