1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef LABWC_SCALED_IMG_BUFFER_H
#define LABWC_SCALED_IMG_BUFFER_H
struct wlr_scene_tree;
struct wlr_scene_node;
struct wlr_scene_buffer;
struct lab_img;
struct scaled_img_buffer {
struct scaled_buffer *scaled_buffer;
struct wlr_scene_buffer *scene_buffer;
struct lab_img *img;
int width;
int height;
};
/*
* | |
* .------------------. .------------.
* scaled_img_buffer | new_output_scale | | set_buffer |
* architecture ´------------------` ´------------`
* | ^
* .--------------------------------|----------------|-------------.
* | v | |
* | .-------------------. .-------------------------. |
* | | scaled_img_buffer |----| wlr_buffer LRU cache(2) |<----, |
* | ´-------------------` ´-------------------------` | |
* | | | | |
* | | .--------------------------. | |
* | | | wlr_buffer LRU cache of | | |
* .-------. | | | other scaled_img_buffers | | |
* | theme | | | | with lab_img_equal() | | |
* ´-------` | | ´--------------------------` | |
* | | | / | | |
* | | | not found found | |
* .---------. | .---------. .----------. .------------. | |
* | lab_img |-img_copy-->| lab_img |-----| render() |--->| wlr_buffer |-----` |
* ´---------` | ´---------` ´----------` ´------------` |
* \ | / |
* \ ´----------/----------------------------------------------------`
* \ /
* .----------------. lab_img provides:
* | lab_img_data | - render function
* | refcount=2 | - list of modification functions
* | `-----------------. to apply on top of lib_img_data
* | | when rendering
* | provides (depending on backend): | - lab_img_equal() comparing the
* | - librsvg handle | lab_img_data reference and
* | - cairo surface | modification function pointers
* ´----------------------------------` of two given lab_img instances
*
*/
/*
* Create an auto scaling image buffer, providing a wlr_scene_buffer node for
* display. It gets destroyed automatically when the backing scaled_buffer
* is being destroyed which in turn happens automatically when the backing
* wlr_scene_buffer (or one of its parents) is being destroyed.
*
* This function clones the lab_img passed as the image source, so callers are
* free to destroy it.
*/
struct scaled_img_buffer *scaled_img_buffer_create(struct wlr_scene_tree *parent,
struct lab_img *img, int width, int height);
#endif /* LABWC_SCALED_IMG_BUFFER_H */
|
