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wlr_scene_*_create() functions all allocate memory via calloc() and return NULL if the allocation fails. Previously, the failures were handled in any of 3 different ways: - sending a wayland protocol error - exiting labwc with an error - segfault (no NULL check at all) Since labwc does not attempt to survive heap exhaustion in other allocation paths (such as `znew`), it seems more consistent to use the same die_if_null() check used in those paths to exit with an error. For the three most common create() functions (tree, rect, buffer), add small lab_wlr_ wrappers to common/scene-helpers.
33 lines
1.2 KiB
C
33 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef LABWC_SCENE_HELPERS_H
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#define LABWC_SCENE_HELPERS_H
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#include <stdbool.h>
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struct wlr_buffer;
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struct wlr_scene_node;
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struct wlr_surface;
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struct wlr_scene_output;
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struct wlr_output_state;
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struct wlr_surface *lab_wlr_surface_from_node(struct wlr_scene_node *node);
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/* variants of wlr_scene_*_create() functions that don't return NULL */
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struct wlr_scene_tree *lab_wlr_scene_tree_create(struct wlr_scene_tree *parent);
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struct wlr_scene_rect *lab_wlr_scene_rect_create(struct wlr_scene_tree *parent,
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int width, int height, const float color[static 4]);
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struct wlr_scene_buffer *lab_wlr_scene_buffer_create(
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struct wlr_scene_tree *parent, struct wlr_buffer *buffer);
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/**
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* lab_get_prev_node - return previous (sibling) node
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* @node: node to find the previous node from
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* Return NULL if previous link is list-head which means node is bottom-most
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*/
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struct wlr_scene_node *lab_wlr_scene_get_prev_node(struct wlr_scene_node *node);
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/* A variant of wlr_scene_output_commit() that respects wlr_output->pending */
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bool lab_wlr_scene_output_commit(struct wlr_scene_output *scene_output,
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struct wlr_output_state *state);
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#endif /* LABWC_SCENE_HELPERS_H */
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