mirror of
https://github.com/labwc/labwc.git
synced 2025-11-03 09:01:51 -05:00
72 lines
3.7 KiB
C
72 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
#ifndef LABWC_SCALED_IMG_BUFFER_H
|
||
#define LABWC_SCALED_IMG_BUFFER_H
|
||
|
||
#include <stdbool.h>
|
||
|
||
struct wlr_scene_tree;
|
||
struct wlr_scene_node;
|
||
struct wlr_scene_buffer;
|
||
struct lab_img;
|
||
|
||
struct scaled_img_buffer {
|
||
struct scaled_scene_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_scene_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);
|
||
|
||
/* Obtain scaled_img_buffer from wlr_scene_node */
|
||
struct scaled_img_buffer *scaled_img_buffer_from_node(struct wlr_scene_node *node);
|
||
|
||
#endif /* LABWC_SCALED_IMG_BUFFER_H */
|