buffer.c File Reference

#include "buffer.h"
#include <math.h>
#include <string.h>
#include <wayland-util.h>
#include <wlr/types/wlr_buffer.h>
#include <wlr/types/wlr_scene.h>
#include "input.h"
#include "libbase/libbase.h"
#include "util.h"

Include dependency graph for buffer.c:

Functions
static struct wlr_scene_node *	_wlmtk_buffer_element_create_scene_node (wlmtk_element_t *element_ptr, struct wlr_scene_tree *wlr_scene_tree_ptr)
static void	_wlmtk_buffer_element_get_dimensions (wlmtk_element_t *element_ptr, int *left_ptr, int *top_ptr, int *right_ptr, int *bottom_ptr)
static bool	_wlmtk_buffer_element_pointer_motion (wlmtk_element_t *element_ptr, wlmtk_pointer_motion_event_t *motion_event_ptr)
static void	handle_wlr_scene_buffer_node_destroy (struct wl_listener *listener_ptr, void *data_ptr)
bool	wlmtk_buffer_init (wlmtk_buffer_t *buffer_ptr)
void	wlmtk_buffer_fini (wlmtk_buffer_t *buffer_ptr)
void	wlmtk_buffer_set (wlmtk_buffer_t *buffer_ptr, struct wlr_buffer *wlr_buffer_ptr)
wlmtk_element_t *	wlmtk_buffer_element (wlmtk_buffer_t *buffer_ptr)

Variables
static const wlmtk_element_vmt_t	buffer_element_vmt

Detailed Description

Copyright

Copyright 2023 Google LLC

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Function Documentation

_wlmtk_buffer_element_create_scene_node()

struct wlr_scene_node * _wlmtk_buffer_element_create_scene_node ( wlmtk_element_t *  element_ptr, struct wlr_scene_tree *  wlr_scene_tree_ptr  )

static

Implementation of the superclass wlmtk_element_t::create_scene_node method.

Creates a struct wlr_scene_buffer attached to wlr_scene_tree_ptr.

Parameters

element_ptr
wlr_scene_tree_ptr

_wlmtk_buffer_element_get_dimensions()

void _wlmtk_buffer_element_get_dimensions ( wlmtk_element_t *  element_ptr, int *  left_ptr, int *  top_ptr, int *  right_ptr, int *  bottom_ptr  )

static

Implementation of the element's get_dimensions method: Return dimensions.

Parameters

element_ptr
left_ptr	Leftmost position. May be NULL.
top_ptr	Topmost position. May be NULL.
right_ptr	Rightmost position. Ma be NULL.
bottom_ptr	Bottommost position. May be NULL.

_wlmtk_buffer_element_pointer_motion()

bool _wlmtk_buffer_element_pointer_motion ( wlmtk_element_t *  element_ptr, wlmtk_pointer_motion_event_t *  motion_event_ptr  )

static

Implementation of the element's motion method: Calls the parent's implementation. If the motion happen outside the buffer's dimensions, the coordinates provided to the parent will be NAN.

Parameters

element_ptr
motion_event_ptr

Returns

true if (x, y) is within the buffer's dimensions.

handle_wlr_scene_buffer_node_destroy()

void handle_wlr_scene_buffer_node_destroy ( struct wl_listener *  listener_ptr, void *  data_ptr  )

static

Handles the 'destroy' callback of wlr_scene_buffer_ptr->node.

Will reset the wlr_scene_buffer_ptr value. Destruction of the node had been triggered (hence the callback).

Parameters

listener_ptr
data_ptr

wlmtk_buffer_element()

wlmtk_element_t * wlmtk_buffer_element

(

wlmtk_buffer_t *

buffer_ptr

)

Returns

the superclass' wlmtk_element_t of buffer_ptr.

wlmtk_buffer_fini()

void wlmtk_buffer_fini

(

wlmtk_buffer_t *

buffer_ptr

)

Cleans up the buffer.

Parameters

buffer_ptr

wlmtk_buffer_init()

bool wlmtk_buffer_init

(

wlmtk_buffer_t *

buffer_ptr

)

Initializes the buffer.

Parameters

buffer_ptr

Returns

true on success.

wlmtk_buffer_set()

void wlmtk_buffer_set	(	wlmtk_buffer_t *	buffer_ptr,
		struct wlr_buffer *	wlr_buffer_ptr
	)

Sets (or updates) buffer contents.

Parameters

buffer_ptr
wlr_buffer_ptr	A WLR buffer to use for the update. That buffer will get locked by wlmtk_buffer_t for the duration of it's use.

Variable Documentation

buffer_element_vmt

const wlmtk_element_vmt_t buffer_element_vmt

static

Initial value:

= {
    .create_scene_node = _wlmtk_buffer_element_create_scene_node,
    .get_dimensions = _wlmtk_buffer_element_get_dimensions,
    .pointer_motion = _wlmtk_buffer_element_pointer_motion,
}

Method table for the buffer's virtual methods.