371 lines
12 KiB
C
371 lines
12 KiB
C
#include <assert.h>
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#include <stdlib.h>
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#include <wlr/types/wlr_compositor.h>
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#include <wlr/types/wlr_scene.h>
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#include <wlr/types/wlr_subcompositor.h>
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#include <wlr/util/addon.h>
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#include "types/wlr_scene.h"
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/**
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* A tree for a surface and all of its child sub-surfaces.
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*
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* `tree` contains `scene_surface` and one node per sub-surface.
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*/
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struct wlr_scene_subsurface_tree {
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struct wlr_scene_tree *tree;
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struct wlr_surface *surface;
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struct wlr_scene_surface *scene_surface;
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struct wl_listener surface_destroy;
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struct wl_listener surface_commit;
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struct wl_listener surface_map;
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struct wl_listener surface_unmap;
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struct wl_listener surface_new_subsurface;
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struct wlr_scene_subsurface_tree *parent; // NULL for the top-level surface
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struct wlr_addon scene_addon;
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struct wlr_box clip;
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// Only valid if the surface is a sub-surface
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struct wlr_addon surface_addon;
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struct wl_listener subsurface_destroy;
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};
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static void subsurface_tree_addon_destroy(struct wlr_addon *addon) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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wl_container_of(addon, subsurface_tree, scene_addon);
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// tree and scene_surface will be cleaned up by scene_node_finish
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if (subsurface_tree->parent) {
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wlr_addon_finish(&subsurface_tree->surface_addon);
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wl_list_remove(&subsurface_tree->subsurface_destroy.link);
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}
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wlr_addon_finish(&subsurface_tree->scene_addon);
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wl_list_remove(&subsurface_tree->surface_destroy.link);
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wl_list_remove(&subsurface_tree->surface_commit.link);
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wl_list_remove(&subsurface_tree->surface_map.link);
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wl_list_remove(&subsurface_tree->surface_unmap.link);
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wl_list_remove(&subsurface_tree->surface_new_subsurface.link);
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free(subsurface_tree);
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}
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static const struct wlr_addon_interface subsurface_tree_surface_addon_impl;
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static struct wlr_scene_subsurface_tree *subsurface_tree_from_subsurface(
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struct wlr_scene_subsurface_tree *parent,
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struct wlr_subsurface *subsurface) {
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struct wlr_addon *addon = wlr_addon_find(&subsurface->surface->addons,
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parent, &subsurface_tree_surface_addon_impl);
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assert(addon != NULL);
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struct wlr_scene_subsurface_tree *subsurface_tree =
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wl_container_of(addon, subsurface_tree, surface_addon);
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return subsurface_tree;
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}
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static bool subsurface_tree_reconfigure_clip(
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struct wlr_scene_subsurface_tree *subsurface_tree) {
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if (subsurface_tree->parent) {
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subsurface_tree->clip = (struct wlr_box){
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.x = subsurface_tree->parent->clip.x - subsurface_tree->tree->node.x,
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.y = subsurface_tree->parent->clip.y - subsurface_tree->tree->node.y,
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.width = subsurface_tree->parent->clip.width,
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.height = subsurface_tree->parent->clip.height,
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};
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}
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if (wlr_box_empty(&subsurface_tree->clip)) {
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scene_surface_set_clip(subsurface_tree->scene_surface, NULL);
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wlr_scene_node_set_enabled(&subsurface_tree->scene_surface->buffer->node, true);
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wlr_scene_node_set_position(&subsurface_tree->scene_surface->buffer->node, 0, 0);
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return false;
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} else {
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struct wlr_box clip = subsurface_tree->clip;
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struct wlr_box surface_box = {
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.width = subsurface_tree->surface->current.width,
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.height = subsurface_tree->surface->current.height,
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};
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bool intersects = wlr_box_intersection(&clip, &clip, &surface_box);
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wlr_scene_node_set_enabled(&subsurface_tree->scene_surface->buffer->node, intersects);
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if (intersects) {
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wlr_scene_node_set_position(&subsurface_tree->scene_surface->buffer->node, clip.x, clip.y);
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scene_surface_set_clip(subsurface_tree->scene_surface, &clip);
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}
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return true;
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}
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}
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static void subsurface_tree_reconfigure(
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struct wlr_scene_subsurface_tree *subsurface_tree) {
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bool has_clip = subsurface_tree_reconfigure_clip(subsurface_tree);
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struct wlr_surface *surface = subsurface_tree->surface;
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struct wlr_scene_node *prev = NULL;
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struct wlr_subsurface *subsurface;
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wl_list_for_each(subsurface, &surface->current.subsurfaces_below,
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current.link) {
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struct wlr_scene_subsurface_tree *child =
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subsurface_tree_from_subsurface(subsurface_tree, subsurface);
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if (prev != NULL) {
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wlr_scene_node_place_above(&child->tree->node, prev);
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}
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prev = &child->tree->node;
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wlr_scene_node_set_position(&child->tree->node,
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subsurface->current.x, subsurface->current.y);
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if (has_clip) {
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subsurface_tree_reconfigure_clip(child);
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}
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}
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if (prev != NULL) {
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wlr_scene_node_place_above(&subsurface_tree->scene_surface->buffer->node, prev);
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}
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prev = &subsurface_tree->scene_surface->buffer->node;
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wl_list_for_each(subsurface, &surface->current.subsurfaces_above,
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current.link) {
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struct wlr_scene_subsurface_tree *child =
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subsurface_tree_from_subsurface(subsurface_tree, subsurface);
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wlr_scene_node_place_above(&child->tree->node, prev);
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prev = &child->tree->node;
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wlr_scene_node_set_position(&child->tree->node,
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subsurface->current.x, subsurface->current.y);
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if (has_clip) {
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subsurface_tree_reconfigure_clip(child);
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}
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}
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}
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static void subsurface_tree_handle_surface_destroy(struct wl_listener *listener,
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void *data) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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wl_container_of(listener, subsurface_tree, surface_destroy);
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wlr_scene_node_destroy(&subsurface_tree->tree->node);
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}
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static void subsurface_tree_handle_surface_commit(struct wl_listener *listener,
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void *data) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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wl_container_of(listener, subsurface_tree, surface_commit);
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// TODO: only do this on subsurface order or position change
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subsurface_tree_reconfigure(subsurface_tree);
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}
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static void subsurface_tree_handle_subsurface_destroy(struct wl_listener *listener,
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void *data) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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wl_container_of(listener, subsurface_tree, subsurface_destroy);
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wlr_scene_node_destroy(&subsurface_tree->tree->node);
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}
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static void subsurface_tree_handle_surface_map(struct wl_listener *listener,
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void *data) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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wl_container_of(listener, subsurface_tree, surface_map);
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wlr_scene_node_set_enabled(&subsurface_tree->tree->node, true);
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}
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static void subsurface_tree_handle_surface_unmap(struct wl_listener *listener,
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void *data) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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wl_container_of(listener, subsurface_tree, surface_unmap);
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wlr_scene_node_set_enabled(&subsurface_tree->tree->node, false);
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}
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static void subsurface_tree_surface_addon_destroy(struct wlr_addon *addon) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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wl_container_of(addon, subsurface_tree, surface_addon);
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wlr_scene_node_destroy(&subsurface_tree->tree->node);
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}
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static const struct wlr_addon_interface subsurface_tree_surface_addon_impl = {
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.name = "wlr_scene_subsurface_tree",
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.destroy = subsurface_tree_surface_addon_destroy,
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};
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static struct wlr_scene_subsurface_tree *scene_surface_tree_create(
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struct wlr_scene_tree *parent, struct wlr_surface *surface);
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static bool subsurface_tree_create_subsurface(
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struct wlr_scene_subsurface_tree *parent,
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struct wlr_subsurface *subsurface) {
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struct wlr_scene_subsurface_tree *child = scene_surface_tree_create(
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parent->tree, subsurface->surface);
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if (child == NULL) {
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return false;
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}
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child->parent = parent;
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wlr_addon_init(&child->surface_addon, &subsurface->surface->addons,
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parent, &subsurface_tree_surface_addon_impl);
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child->subsurface_destroy.notify = subsurface_tree_handle_subsurface_destroy;
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wl_signal_add(&subsurface->events.destroy, &child->subsurface_destroy);
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return true;
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}
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static void subsurface_tree_handle_surface_new_subsurface(
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struct wl_listener *listener, void *data) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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wl_container_of(listener, subsurface_tree, surface_new_subsurface);
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struct wlr_subsurface *subsurface = data;
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if (!subsurface_tree_create_subsurface(subsurface_tree, subsurface)) {
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wl_resource_post_no_memory(subsurface->resource);
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}
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}
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static const struct wlr_addon_interface subsurface_tree_addon_impl = {
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.name = "wlr_scene_subsurface_tree",
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.destroy = subsurface_tree_addon_destroy,
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};
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static struct wlr_scene_subsurface_tree *scene_surface_tree_create(
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struct wlr_scene_tree *parent, struct wlr_surface *surface) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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calloc(1, sizeof(*subsurface_tree));
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if (subsurface_tree == NULL) {
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return NULL;
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}
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subsurface_tree->tree = wlr_scene_tree_create(parent);
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if (subsurface_tree->tree == NULL) {
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goto error_surface_tree;
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}
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subsurface_tree->scene_surface =
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wlr_scene_surface_create(subsurface_tree->tree, surface);
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if (subsurface_tree->scene_surface == NULL) {
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goto error_scene_surface;
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}
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subsurface_tree->surface = surface;
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struct wlr_subsurface *subsurface;
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wl_list_for_each(subsurface, &surface->current.subsurfaces_below,
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current.link) {
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if (!subsurface_tree_create_subsurface(subsurface_tree, subsurface)) {
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goto error_scene_surface;
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}
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}
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wl_list_for_each(subsurface, &surface->current.subsurfaces_above,
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current.link) {
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if (!subsurface_tree_create_subsurface(subsurface_tree, subsurface)) {
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goto error_scene_surface;
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}
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}
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subsurface_tree_reconfigure(subsurface_tree);
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wlr_addon_init(&subsurface_tree->scene_addon, &subsurface_tree->tree->node.addons,
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NULL, &subsurface_tree_addon_impl);
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subsurface_tree->surface_destroy.notify = subsurface_tree_handle_surface_destroy;
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wl_signal_add(&surface->events.destroy, &subsurface_tree->surface_destroy);
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subsurface_tree->surface_commit.notify = subsurface_tree_handle_surface_commit;
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wl_signal_add(&surface->events.commit, &subsurface_tree->surface_commit);
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subsurface_tree->surface_map.notify = subsurface_tree_handle_surface_map;
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wl_signal_add(&surface->events.map, &subsurface_tree->surface_map);
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subsurface_tree->surface_unmap.notify = subsurface_tree_handle_surface_unmap;
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wl_signal_add(&surface->events.unmap, &subsurface_tree->surface_unmap);
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subsurface_tree->surface_new_subsurface.notify =
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subsurface_tree_handle_surface_new_subsurface;
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wl_signal_add(&surface->events.new_subsurface,
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&subsurface_tree->surface_new_subsurface);
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wlr_scene_node_set_enabled(&subsurface_tree->tree->node, surface->mapped);
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return subsurface_tree;
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error_scene_surface:
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wlr_scene_node_destroy(&subsurface_tree->tree->node);
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error_surface_tree:
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free(subsurface_tree);
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return NULL;
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}
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struct wlr_scene_tree *wlr_scene_subsurface_tree_create(
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struct wlr_scene_tree *parent, struct wlr_surface *surface) {
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struct wlr_scene_subsurface_tree *subsurface_tree =
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scene_surface_tree_create(parent, surface);
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if (subsurface_tree == NULL) {
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return NULL;
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}
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return subsurface_tree->tree;
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}
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static struct wlr_scene_subsurface_tree *get_subsurface_tree_from_node(
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struct wlr_scene_node *node) {
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struct wlr_addon *addon = wlr_addon_find(&node->addons, NULL, &subsurface_tree_addon_impl);
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if (!addon) {
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return NULL;
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}
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struct wlr_scene_subsurface_tree *tree =
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wl_container_of(addon, tree, scene_addon);
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return tree;
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}
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static bool subsurface_tree_set_clip(struct wlr_scene_node *node,
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struct wlr_box *clip) {
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if (node->type != WLR_SCENE_NODE_TREE) {
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return false;
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}
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bool discovered_subsurface_tree = false;
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struct wlr_scene_subsurface_tree *tree = get_subsurface_tree_from_node(node);
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if (tree) {
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if (tree->parent == NULL) {
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if (wlr_box_equal(&tree->clip, clip)) {
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return true;
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}
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if (clip) {
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tree->clip = *clip;
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} else {
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tree->clip = (struct wlr_box){0};
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}
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}
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discovered_subsurface_tree = true;
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subsurface_tree_reconfigure_clip(tree);
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}
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struct wlr_scene_tree *scene_tree = wlr_scene_tree_from_node(node);
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struct wlr_scene_node *child;
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wl_list_for_each(child, &scene_tree->children, link) {
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discovered_subsurface_tree |= subsurface_tree_set_clip(child, clip);
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}
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return discovered_subsurface_tree;
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}
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void wlr_scene_subsurface_tree_set_clip(struct wlr_scene_node *node,
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struct wlr_box *clip) {
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#ifndef NDEBUG
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bool found =
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#endif
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subsurface_tree_set_clip(node, clip);
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assert(found);
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}
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