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wlr_scene: Introduce wlr_scene_buffer_set_raster_with_damage

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This commit is contained in:
Alexander Orzechowski 2024-09-14 17:05:32 -04:00
parent 56c38586fc
commit 99eaf7006f
2 changed files with 55 additions and 35 deletions
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9
include/wlr/types/wlr_scene.h
View file

@ -461,6 +461,15 @@ struct wlr_scene_buffer_set_buffer_options {
void wlr_scene_buffer_set_buffer_with_options(struct wlr_scene_buffer *scene_buffer,
struct wlr_buffer *buffer, const struct wlr_scene_buffer_set_buffer_options *options);
/*
* Sets the buffer's backing raster with a custom damage region.
*
* The damage region is in buffer-local coordinates. If the region is NULL,
* the whole buffer node will be damaged.
*/
void wlr_scene_buffer_set_raster_with_damage(struct wlr_scene_buffer *scene_buffer,
struct wlr_raster *raster, const pixman_region32_t *damage);
/**
* Sets the buffer's opaque region. This is an optimization hint used to
* determine if buffers which reside under this one need to be rendered or not.

81
types/scene/wlr_scene.c
View file

@ -752,15 +752,13 @@ static void scene_buffer_set_buffer(struct wlr_scene_buffer *scene_buffer,
if (scene_buffer->own_buffer) {
wlr_buffer_unlock(scene_buffer->buffer);
}
scene_buffer->buffer = NULL;
scene_buffer->buffer = buffer;
scene_buffer->own_buffer = false;
if (!buffer) {
return;
}
scene_buffer->own_buffer = true;
scene_buffer->buffer = wlr_buffer_lock(buffer);
scene_buffer->buffer_release.notify = scene_buffer_handle_buffer_release;
wl_signal_add(&buffer->events.release, &scene_buffer->buffer_release);
}
@ -783,9 +781,14 @@ struct wlr_scene_buffer *wlr_scene_buffer_create(struct wlr_scene_tree *parent,
wl_list_init(&scene_buffer->buffer_release.link);
wl_list_init(&scene_buffer->renderer_destroy.link);
scene_buffer->opacity = 1;
scene_buffer->raster = buffer ? wlr_raster_create(buffer, NULL) : NULL;
scene_buffer_set_buffer(scene_buffer, buffer);
if (buffer) {
scene_buffer->raster = wlr_raster_create(buffer, NULL);
wlr_buffer_lock(buffer);
scene_buffer->own_buffer = true;
}
scene_node_update(&scene_buffer->node, NULL);
return scene_buffer;
@ -798,38 +801,47 @@ void wlr_scene_buffer_set_buffer_with_options(struct wlr_scene_buffer *scene_buf
options = &default_options;
}
// specifying a region for a NULL buffer doesn't make sense. We need to know
// about the buffer to scale the buffer local coordinates down to scene
struct wlr_raster *raster = NULL;
if (buffer) {
raster = wlr_raster_create(buffer, &(struct wlr_raster_create_options) {
.wait_timeline = options->wait_timeline,
.wait_point = options->wait_point,
});
}
wlr_scene_buffer_set_raster_with_damage(scene_buffer, raster, options->damage);
if (raster) {
wlr_buffer_lock(buffer);
scene_buffer->own_buffer = true;
}
wlr_raster_unlock(raster);
}
void wlr_scene_buffer_set_raster_with_damage(struct wlr_scene_buffer *scene_buffer,
struct wlr_raster *raster, const pixman_region32_t *damage) {
// specifying a region for a NULL raster doesn't make sense. We need to know
// about the raster to scale the raster local coordinates down to scene
// coordinates.
assert(buffer || !options->damage);
assert(raster || !damage);
bool mapped = buffer != NULL;
bool prev_mapped = scene_buffer->raster != NULL;
if (!mapped && !prev_mapped) {
// unmapping already unmapped buffer - noop
if (raster == scene_buffer->raster) {
return;
}
// if this node used to not be mapped or its previous displayed
// buffer region will be different from what the new buffer would
// produce we need to update the node.
bool update = mapped != prev_mapped;
if (buffer != NULL && scene_buffer->dst_width == 0 && scene_buffer->dst_height == 0) {
update = update || (int)scene_buffer->raster->width != buffer->width ||
(int)scene_buffer->raster->height != buffer->height;
bool update = !raster != !scene_buffer->raster;
if (raster != NULL && scene_buffer->dst_width == 0 && scene_buffer->dst_height == 0) {
update = update || scene_buffer->raster->width != raster->width ||
scene_buffer->raster->height != raster->height;
}
wlr_raster_unlock(scene_buffer->raster);
scene_buffer->raster = NULL;
scene_buffer_set_buffer(scene_buffer, buffer);
if (buffer) {
scene_buffer->raster = wlr_raster_create(buffer, &(struct wlr_raster_create_options) {
.wait_timeline = options->wait_timeline,
.wait_point = options->wait_point,
});
}
scene_buffer_set_buffer(scene_buffer, raster ? raster->buffer : NULL);
scene_buffer->raster = raster ? wlr_raster_lock(raster) : NULL;
if (update) {
scene_node_update(&scene_buffer->node, NULL);
@ -844,8 +856,7 @@ void wlr_scene_buffer_set_buffer_with_options(struct wlr_scene_buffer *scene_buf
}
pixman_region32_t fallback_damage;
pixman_region32_init_rect(&fallback_damage, 0, 0, buffer->width, buffer->height);
const pixman_region32_t *damage = options->damage;
pixman_region32_init_rect(&fallback_damage, 0, 0, raster->width, raster->height);
if (!damage) {
damage = &fallback_damage;
}
@ -854,26 +865,26 @@ void wlr_scene_buffer_set_buffer_with_options(struct wlr_scene_buffer *scene_buf
if (wlr_fbox_empty(&box)) {
box.x = 0;
box.y = 0;
box.width = buffer->width;
box.height = buffer->height;
box.width = raster->width;
box.height = raster->height;
}
wlr_fbox_transform(&box, &box, scene_buffer->transform,
buffer->width, buffer->height);
raster->width, raster->height);
float scale_x, scale_y;
if (scene_buffer->dst_width || scene_buffer->dst_height) {
scale_x = scene_buffer->dst_width / box.width;
scale_y = scene_buffer->dst_height / box.height;
} else {
scale_x = buffer->width / box.width;
scale_y = buffer->height / box.height;
scale_x = raster->width / box.width;
scale_y = raster->height / box.height;
}
pixman_region32_t trans_damage;
pixman_region32_init(&trans_damage);
wlr_region_transform(&trans_damage, damage,
scene_buffer->transform, buffer->width, buffer->height);
scene_buffer->transform, raster->width, raster->height);
pixman_region32_intersect_rect(&trans_damage, &trans_damage,
box.x, box.y, box.width, box.height);
pixman_region32_translate(&trans_damage, -box.x, -box.y);