wlroots/types/wlr_surface.c

1493 lines
45 KiB
C

#include <assert.h>
#include <stdlib.h>
#include <wayland-server-core.h>
#include <wlr/render/interface.h>
#include <wlr/types/wlr_buffer.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/types/wlr_region.h>
#include <wlr/types/wlr_surface.h>
#include <wlr/types/wlr_output.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
#include "types/wlr_surface.h"
#include "util/signal.h"
#include "util/time.h"
#define CALLBACK_VERSION 1
static int min(int fst, int snd) {
if (fst < snd) {
return fst;
} else {
return snd;
}
}
static int max(int fst, int snd) {
if (fst > snd) {
return fst;
} else {
return snd;
}
}
static void surface_state_reset_buffer(struct wlr_surface_state *state) {
if (state->buffer_resource) {
wl_list_remove(&state->buffer_destroy.link);
state->buffer_resource = NULL;
}
}
static void surface_handle_buffer_destroy(struct wl_listener *listener,
void *data) {
struct wlr_surface_state *state =
wl_container_of(listener, state, buffer_destroy);
surface_state_reset_buffer(state);
}
static void surface_state_set_buffer(struct wlr_surface_state *state,
struct wl_resource *buffer_resource) {
surface_state_reset_buffer(state);
state->buffer_resource = buffer_resource;
if (buffer_resource != NULL) {
wl_resource_add_destroy_listener(buffer_resource,
&state->buffer_destroy);
state->buffer_destroy.notify = surface_handle_buffer_destroy;
}
}
static void surface_handle_destroy(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void surface_handle_attach(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *buffer, int32_t dx, int32_t dy) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
surface->pending.committed |= WLR_SURFACE_STATE_BUFFER;
surface->pending.dx = dx;
surface->pending.dy = dy;
surface_state_set_buffer(&surface->pending, buffer);
}
static void surface_handle_damage(struct wl_client *client,
struct wl_resource *resource,
int32_t x, int32_t y, int32_t width, int32_t height) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
if (width < 0 || height < 0) {
return;
}
surface->pending.committed |= WLR_SURFACE_STATE_SURFACE_DAMAGE;
pixman_region32_union_rect(&surface->pending.surface_damage,
&surface->pending.surface_damage,
x, y, width, height);
}
static void callback_handle_resource_destroy(struct wl_resource *resource) {
wl_list_remove(wl_resource_get_link(resource));
}
static void surface_handle_frame(struct wl_client *client,
struct wl_resource *resource, uint32_t callback) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
struct wl_resource *callback_resource = wl_resource_create(client,
&wl_callback_interface, CALLBACK_VERSION, callback);
if (callback_resource == NULL) {
wl_resource_post_no_memory(resource);
return;
}
wl_resource_set_implementation(callback_resource, NULL, NULL,
callback_handle_resource_destroy);
wl_list_insert(surface->pending.frame_callback_list.prev,
wl_resource_get_link(callback_resource));
surface->pending.committed |= WLR_SURFACE_STATE_FRAME_CALLBACK_LIST;
}
static void surface_handle_set_opaque_region(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *region_resource) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
surface->pending.committed |= WLR_SURFACE_STATE_OPAQUE_REGION;
if (region_resource) {
pixman_region32_t *region = wlr_region_from_resource(region_resource);
pixman_region32_copy(&surface->pending.opaque, region);
} else {
pixman_region32_clear(&surface->pending.opaque);
}
}
static void surface_handle_set_input_region(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *region_resource) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
surface->pending.committed |= WLR_SURFACE_STATE_INPUT_REGION;
if (region_resource) {
pixman_region32_t *region = wlr_region_from_resource(region_resource);
pixman_region32_copy(&surface->pending.input, region);
} else {
pixman_region32_fini(&surface->pending.input);
pixman_region32_init_rect(&surface->pending.input,
INT32_MIN, INT32_MIN, UINT32_MAX, UINT32_MAX);
}
}
/**
* Computes the surface viewport source size, ie. the size after applying the
* surface's scale, transform and cropping (via the viewport's source
* rectangle) but before applying the viewport scaling (via the viewport's
* destination rectangle).
*/
static void surface_state_viewport_src_size(struct wlr_surface_state *state,
int *out_width, int *out_height) {
if (state->buffer_width == 0 && state->buffer_height == 0) {
*out_width = *out_height = 0;
return;
}
if (state->viewport.has_src) {
*out_width = state->viewport.src.width;
*out_height = state->viewport.src.height;
} else {
int width = state->buffer_width / state->scale;
int height = state->buffer_height / state->scale;
if ((state->transform & WL_OUTPUT_TRANSFORM_90) != 0) {
int tmp = width;
width = height;
height = tmp;
}
*out_width = width;
*out_height = height;
}
}
static void surface_state_finalize(struct wlr_surface *surface,
struct wlr_surface_state *state) {
if ((state->committed & WLR_SURFACE_STATE_BUFFER)) {
if (state->buffer_resource) {
wlr_buffer_unlock(state->buffer);
state->buffer = wlr_buffer_from_resource(state->buffer_resource);
if (!state->buffer) {
wl_resource_post_error(state->buffer_resource, 0,
"unknown buffer type");
return;
}
state->buffer_width = state->buffer->width;
state->buffer_height = state->buffer->height;
} else {
state->buffer_width = state->buffer_height = 0;
}
}
if (!state->viewport.has_src &&
(state->buffer_width % state->scale != 0 ||
state->buffer_height % state->scale != 0)) {
// TODO: send WL_SURFACE_ERROR_INVALID_SIZE error once this issue is
// resolved:
// https://gitlab.freedesktop.org/wayland/wayland/-/issues/194
wlr_log(WLR_DEBUG, "Client bug: submitted a buffer whose size (%dx%d) "
"is not divisible by scale (%d)", state->buffer_width,
state->buffer_height, state->scale);
}
if (state->viewport.has_dst) {
if (state->buffer_width == 0 && state->buffer_height == 0) {
state->width = state->height = 0;
} else {
state->width = state->viewport.dst_width;
state->height = state->viewport.dst_height;
}
} else {
surface_state_viewport_src_size(state, &state->width, &state->height);
}
pixman_region32_intersect_rect(&state->surface_damage,
&state->surface_damage, 0, 0, state->width, state->height);
pixman_region32_intersect_rect(&state->buffer_damage,
&state->buffer_damage, 0, 0, state->buffer_width,
state->buffer_height);
}
static void surface_update_damage(pixman_region32_t *buffer_damage,
struct wlr_surface_state *current, struct wlr_surface_state *pending) {
pixman_region32_clear(buffer_damage);
if (pending->width != current->width ||
pending->height != current->height) {
// Damage the whole buffer on resize
pixman_region32_union_rect(buffer_damage, buffer_damage, 0, 0,
pending->buffer_width, pending->buffer_height);
} else {
// Copy over surface damage + buffer damage
pixman_region32_t surface_damage;
pixman_region32_init(&surface_damage);
pixman_region32_copy(&surface_damage, &pending->surface_damage);
if (pending->viewport.has_dst) {
int src_width, src_height;
surface_state_viewport_src_size(pending, &src_width, &src_height);
float scale_x = (float)pending->viewport.dst_width / src_width;
float scale_y = (float)pending->viewport.dst_height / src_height;
wlr_region_scale_xy(&surface_damage, &surface_damage,
1.0 / scale_x, 1.0 / scale_y);
}
if (pending->viewport.has_src) {
// This is lossy: do a best-effort conversion
pixman_region32_translate(&surface_damage,
floor(pending->viewport.src.x),
floor(pending->viewport.src.y));
}
wlr_region_transform(&surface_damage, &surface_damage,
wlr_output_transform_invert(pending->transform),
pending->width, pending->height);
wlr_region_scale(&surface_damage, &surface_damage, pending->scale);
pixman_region32_union(buffer_damage,
&pending->buffer_damage, &surface_damage);
pixman_region32_fini(&surface_damage);
}
}
/**
* Append pending state to current state and clear pending state.
*/
static void surface_state_move(struct wlr_surface_state *state,
struct wlr_surface_state *next) {
state->width = next->width;
state->height = next->height;
state->buffer_width = next->buffer_width;
state->buffer_height = next->buffer_height;
if (next->committed & WLR_SURFACE_STATE_SCALE) {
state->scale = next->scale;
}
if (next->committed & WLR_SURFACE_STATE_TRANSFORM) {
state->transform = next->transform;
}
if (next->committed & WLR_SURFACE_STATE_BUFFER) {
state->dx = next->dx;
state->dy = next->dy;
next->dx = next->dy = 0;
surface_state_set_buffer(state, next->buffer_resource);
surface_state_reset_buffer(next);
if (next->buffer) {
wlr_buffer_unlock(state->buffer);
state->buffer = wlr_buffer_lock(next->buffer);
}
wlr_buffer_unlock(next->buffer);
next->buffer = NULL;
} else {
state->dx = state->dy = 0;
}
if (next->committed & WLR_SURFACE_STATE_SURFACE_DAMAGE) {
pixman_region32_copy(&state->surface_damage, &next->surface_damage);
pixman_region32_clear(&next->surface_damage);
} else {
pixman_region32_clear(&state->surface_damage);
}
if (next->committed & WLR_SURFACE_STATE_BUFFER_DAMAGE) {
pixman_region32_copy(&state->buffer_damage, &next->buffer_damage);
pixman_region32_clear(&next->buffer_damage);
} else {
pixman_region32_clear(&state->buffer_damage);
}
if (next->committed & WLR_SURFACE_STATE_OPAQUE_REGION) {
pixman_region32_copy(&state->opaque, &next->opaque);
}
if (next->committed & WLR_SURFACE_STATE_INPUT_REGION) {
pixman_region32_copy(&state->input, &next->input);
}
if (next->committed & WLR_SURFACE_STATE_VIEWPORT) {
memcpy(&state->viewport, &next->viewport, sizeof(state->viewport));
}
if (next->committed & WLR_SURFACE_STATE_FRAME_CALLBACK_LIST) {
wl_list_insert_list(&state->frame_callback_list,
&next->frame_callback_list);
wl_list_init(&next->frame_callback_list);
}
state->committed |= next->committed;
next->committed = 0;
state->seq = next->seq;
state->cached_state_locks = next->cached_state_locks;
next->cached_state_locks = 0;
}
static void surface_damage_subsurfaces(struct wlr_subsurface *subsurface) {
// XXX: This is probably the wrong way to do it, because this damage should
// come from the client, but weston doesn't do it correctly either and it
// seems to work ok. See the comment on weston_surface_damage for more info
// about a better approach.
struct wlr_surface *surface = subsurface->surface;
pixman_region32_union_rect(&surface->buffer_damage,
&surface->buffer_damage, 0, 0,
surface->current.buffer_width, surface->current.buffer_height);
subsurface->reordered = false;
struct wlr_subsurface *child;
wl_list_for_each(child, &subsurface->surface->current.subsurfaces_below,
current.link) {
surface_damage_subsurfaces(child);
}
wl_list_for_each(child, &subsurface->surface->current.subsurfaces_above,
current.link) {
surface_damage_subsurfaces(child);
}
}
static void surface_apply_damage(struct wlr_surface *surface) {
struct wl_resource *resource = surface->current.buffer_resource;
if (resource == NULL) {
// NULL commit
if (surface->buffer != NULL) {
wlr_buffer_unlock(&surface->buffer->base);
}
surface->buffer = NULL;
return;
}
if (surface->buffer != NULL) {
struct wlr_client_buffer *updated_buffer =
wlr_client_buffer_apply_damage(surface->buffer, resource,
&surface->buffer_damage);
if (updated_buffer != NULL) {
wlr_buffer_unlock(surface->current.buffer);
surface->current.buffer = NULL;
surface->buffer = updated_buffer;
return;
}
}
struct wlr_client_buffer *buffer = wlr_client_buffer_create(
surface->current.buffer, surface->renderer);
wlr_buffer_unlock(surface->current.buffer);
surface->current.buffer = NULL;
if (buffer == NULL) {
wlr_log(WLR_ERROR, "Failed to upload buffer");
return;
}
if (surface->buffer != NULL) {
wlr_buffer_unlock(&surface->buffer->base);
}
surface->buffer = buffer;
}
static void surface_update_opaque_region(struct wlr_surface *surface) {
struct wlr_texture *texture = wlr_surface_get_texture(surface);
if (texture == NULL) {
pixman_region32_clear(&surface->opaque_region);
return;
}
if (wlr_texture_is_opaque(texture)) {
pixman_region32_init_rect(&surface->opaque_region,
0, 0, surface->current.width, surface->current.height);
return;
}
pixman_region32_intersect_rect(&surface->opaque_region,
&surface->current.opaque,
0, 0, surface->current.width, surface->current.height);
}
static void surface_update_input_region(struct wlr_surface *surface) {
pixman_region32_intersect_rect(&surface->input_region,
&surface->current.input,
0, 0, surface->current.width, surface->current.height);
}
static void surface_state_init(struct wlr_surface_state *state);
static void surface_cache_pending(struct wlr_surface *surface) {
struct wlr_surface_state *cached = calloc(1, sizeof(*cached));
if (!cached) {
wl_resource_post_no_memory(surface->resource);
return;
}
surface_state_init(cached);
surface_state_move(cached, &surface->pending);
wl_list_insert(surface->cached.prev, &cached->cached_state_link);
surface->pending.seq++;
}
static void surface_commit_state(struct wlr_surface *surface,
struct wlr_surface_state *next) {
assert(next->cached_state_locks == 0);
bool invalid_buffer = next->committed & WLR_SURFACE_STATE_BUFFER;
surface->sx += next->dx;
surface->sy += next->dy;
surface_update_damage(&surface->buffer_damage, &surface->current, next);
surface->previous.scale = surface->current.scale;
surface->previous.transform = surface->current.transform;
surface->previous.width = surface->current.width;
surface->previous.height = surface->current.height;
surface->previous.buffer_width = surface->current.buffer_width;
surface->previous.buffer_height = surface->current.buffer_height;
surface_state_move(&surface->current, next);
if (invalid_buffer) {
surface_apply_damage(surface);
}
surface_update_opaque_region(surface);
surface_update_input_region(surface);
// commit subsurface order
struct wlr_subsurface *subsurface;
wl_list_for_each_reverse(subsurface, &surface->pending.subsurfaces_above,
pending.link) {
wl_list_remove(&subsurface->current.link);
wl_list_insert(&surface->current.subsurfaces_above,
&subsurface->current.link);
if (subsurface->reordered) {
// TODO: damage all the subsurfaces
surface_damage_subsurfaces(subsurface);
}
}
wl_list_for_each_reverse(subsurface, &surface->pending.subsurfaces_below,
pending.link) {
wl_list_remove(&subsurface->current.link);
wl_list_insert(&surface->current.subsurfaces_below,
&subsurface->current.link);
if (subsurface->reordered) {
// TODO: damage all the subsurfaces
surface_damage_subsurfaces(subsurface);
}
}
// If we're committing the pending state, bump the pending sequence number
// here, to allow commit listeners to lock the new pending state.
if (next == &surface->pending) {
surface->pending.seq++;
}
if (surface->role && surface->role->commit) {
surface->role->commit(surface);
}
wlr_signal_emit_safe(&surface->events.commit, surface);
}
static void surface_commit_pending(struct wlr_surface *surface) {
surface_state_finalize(surface, &surface->pending);
if (surface->role && surface->role->precommit) {
surface->role->precommit(surface);
}
if (surface->pending.cached_state_locks > 0 || !wl_list_empty(&surface->cached)) {
surface_cache_pending(surface);
} else {
surface_commit_state(surface, &surface->pending);
}
}
static bool subsurface_is_synchronized(struct wlr_subsurface *subsurface) {
while (subsurface != NULL) {
if (subsurface->synchronized) {
return true;
}
if (!subsurface->parent) {
return false;
}
if (!wlr_surface_is_subsurface(subsurface->parent)) {
break;
}
subsurface = wlr_subsurface_from_wlr_surface(subsurface->parent);
}
return false;
}
/**
* Recursive function to commit the effectively synchronized children.
*/
static void subsurface_parent_commit(struct wlr_subsurface *subsurface,
bool synchronized) {
struct wlr_surface *surface = subsurface->surface;
if (synchronized || subsurface->synchronized) {
if (subsurface->has_cache) {
wlr_surface_unlock_cached(surface, subsurface->cached_seq);
subsurface->has_cache = false;
subsurface->cached_seq = 0;
}
struct wlr_subsurface *subsurface;
wl_list_for_each(subsurface, &surface->current.subsurfaces_below,
current.link) {
subsurface_parent_commit(subsurface, true);
}
wl_list_for_each(subsurface, &surface->current.subsurfaces_above,
current.link) {
subsurface_parent_commit(subsurface, true);
}
}
}
static void subsurface_commit(struct wlr_subsurface *subsurface) {
struct wlr_surface *surface = subsurface->surface;
if (subsurface_is_synchronized(subsurface)) {
if (subsurface->has_cache) {
// We already lock a previous commit. The prevents any future
// commit to be applied before we release the previous commit.
return;
}
subsurface->has_cache = true;
subsurface->cached_seq = wlr_surface_lock_pending(surface);
}
}
static void surface_handle_commit(struct wl_client *client,
struct wl_resource *resource) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
struct wlr_subsurface *subsurface = wlr_surface_is_subsurface(surface) ?
wlr_subsurface_from_wlr_surface(surface) : NULL;
if (subsurface != NULL) {
subsurface_commit(subsurface);
}
surface_commit_pending(surface);
wl_list_for_each(subsurface, &surface->current.subsurfaces_below, current.link) {
subsurface_parent_commit(subsurface, false);
}
wl_list_for_each(subsurface, &surface->current.subsurfaces_above, current.link) {
subsurface_parent_commit(subsurface, false);
}
}
static void surface_handle_set_buffer_transform(struct wl_client *client,
struct wl_resource *resource, int32_t transform) {
if (transform < WL_OUTPUT_TRANSFORM_NORMAL ||
transform > WL_OUTPUT_TRANSFORM_FLIPPED_270) {
wl_resource_post_error(resource, WL_SURFACE_ERROR_INVALID_TRANSFORM,
"Specified transform value (%d) is invalid", transform);
return;
}
struct wlr_surface *surface = wlr_surface_from_resource(resource);
surface->pending.committed |= WLR_SURFACE_STATE_TRANSFORM;
surface->pending.transform = transform;
}
static void surface_handle_set_buffer_scale(struct wl_client *client,
struct wl_resource *resource, int32_t scale) {
if (scale <= 0) {
wl_resource_post_error(resource, WL_SURFACE_ERROR_INVALID_SCALE,
"Specified scale value (%d) is not positive", scale);
return;
}
struct wlr_surface *surface = wlr_surface_from_resource(resource);
surface->pending.committed |= WLR_SURFACE_STATE_SCALE;
surface->pending.scale = scale;
}
static void surface_handle_damage_buffer(struct wl_client *client,
struct wl_resource *resource,
int32_t x, int32_t y, int32_t width,
int32_t height) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
if (width < 0 || height < 0) {
return;
}
surface->pending.committed |= WLR_SURFACE_STATE_BUFFER_DAMAGE;
pixman_region32_union_rect(&surface->pending.buffer_damage,
&surface->pending.buffer_damage,
x, y, width, height);
}
static const struct wl_surface_interface surface_implementation = {
.destroy = surface_handle_destroy,
.attach = surface_handle_attach,
.damage = surface_handle_damage,
.frame = surface_handle_frame,
.set_opaque_region = surface_handle_set_opaque_region,
.set_input_region = surface_handle_set_input_region,
.commit = surface_handle_commit,
.set_buffer_transform = surface_handle_set_buffer_transform,
.set_buffer_scale = surface_handle_set_buffer_scale,
.damage_buffer = surface_handle_damage_buffer
};
struct wlr_surface *wlr_surface_from_resource(struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &wl_surface_interface,
&surface_implementation));
return wl_resource_get_user_data(resource);
}
static void surface_state_init(struct wlr_surface_state *state) {
state->scale = 1;
state->transform = WL_OUTPUT_TRANSFORM_NORMAL;
wl_list_init(&state->subsurfaces_above);
wl_list_init(&state->subsurfaces_below);
wl_list_init(&state->frame_callback_list);
pixman_region32_init(&state->surface_damage);
pixman_region32_init(&state->buffer_damage);
pixman_region32_init(&state->opaque);
pixman_region32_init_rect(&state->input,
INT32_MIN, INT32_MIN, UINT32_MAX, UINT32_MAX);
}
static void surface_state_finish(struct wlr_surface_state *state) {
surface_state_reset_buffer(state);
wlr_buffer_unlock(state->buffer);
struct wl_resource *resource, *tmp;
wl_resource_for_each_safe(resource, tmp, &state->frame_callback_list) {
wl_resource_destroy(resource);
}
pixman_region32_fini(&state->surface_damage);
pixman_region32_fini(&state->buffer_damage);
pixman_region32_fini(&state->opaque);
pixman_region32_fini(&state->input);
}
static void surface_state_destroy_cached(struct wlr_surface_state *state) {
surface_state_finish(state);
wl_list_remove(&state->cached_state_link);
free(state);
}
static void subsurface_unmap(struct wlr_subsurface *subsurface);
static void subsurface_destroy(struct wlr_subsurface *subsurface) {
if (subsurface == NULL) {
return;
}
if (subsurface->has_cache) {
wlr_surface_unlock_cached(subsurface->surface,
subsurface->cached_seq);
}
subsurface_unmap(subsurface);
wlr_signal_emit_safe(&subsurface->events.destroy, subsurface);
wl_list_remove(&subsurface->surface_destroy.link);
if (subsurface->parent) {
wl_list_remove(&subsurface->current.link);
wl_list_remove(&subsurface->pending.link);
wl_list_remove(&subsurface->parent_destroy.link);
}
wl_resource_set_user_data(subsurface->resource, NULL);
if (subsurface->surface) {
subsurface->surface->role_data = NULL;
}
free(subsurface);
}
static void surface_output_destroy(struct wlr_surface_output *surface_output);
static void surface_handle_resource_destroy(struct wl_resource *resource) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
struct wlr_surface_output *surface_output, *surface_output_tmp;
wl_list_for_each_safe(surface_output, surface_output_tmp,
&surface->current_outputs, link) {
surface_output_destroy(surface_output);
}
wlr_signal_emit_safe(&surface->events.destroy, surface);
struct wlr_surface_state *cached, *cached_tmp;
wl_list_for_each_safe(cached, cached_tmp, &surface->cached, cached_state_link) {
surface_state_destroy_cached(cached);
}
wl_list_remove(&surface->renderer_destroy.link);
surface_state_finish(&surface->pending);
surface_state_finish(&surface->current);
pixman_region32_fini(&surface->buffer_damage);
pixman_region32_fini(&surface->opaque_region);
pixman_region32_fini(&surface->input_region);
if (surface->buffer != NULL) {
wlr_buffer_unlock(&surface->buffer->base);
}
free(surface);
}
static void surface_handle_renderer_destroy(struct wl_listener *listener,
void *data) {
struct wlr_surface *surface =
wl_container_of(listener, surface, renderer_destroy);
wl_resource_destroy(surface->resource);
}
struct wlr_surface *surface_create(struct wl_client *client,
uint32_t version, uint32_t id, struct wlr_renderer *renderer) {
struct wlr_surface *surface = calloc(1, sizeof(struct wlr_surface));
if (!surface) {
wl_client_post_no_memory(client);
return NULL;
}
surface->resource = wl_resource_create(client, &wl_surface_interface,
version, id);
if (surface->resource == NULL) {
free(surface);
wl_client_post_no_memory(client);
return NULL;
}
wl_resource_set_implementation(surface->resource, &surface_implementation,
surface, surface_handle_resource_destroy);
wlr_log(WLR_DEBUG, "New wlr_surface %p (res %p)", surface, surface->resource);
surface->renderer = renderer;
surface_state_init(&surface->current);
surface_state_init(&surface->pending);
surface->pending.seq = 1;
wl_signal_init(&surface->events.commit);
wl_signal_init(&surface->events.destroy);
wl_signal_init(&surface->events.new_subsurface);
wl_list_init(&surface->current_outputs);
wl_list_init(&surface->cached);
pixman_region32_init(&surface->buffer_damage);
pixman_region32_init(&surface->opaque_region);
pixman_region32_init(&surface->input_region);
wl_signal_add(&renderer->events.destroy, &surface->renderer_destroy);
surface->renderer_destroy.notify = surface_handle_renderer_destroy;
return surface;
}
struct wlr_texture *wlr_surface_get_texture(struct wlr_surface *surface) {
if (surface->buffer == NULL) {
return NULL;
}
return surface->buffer->texture;
}
bool wlr_surface_has_buffer(struct wlr_surface *surface) {
return wlr_surface_get_texture(surface) != NULL;
}
bool wlr_surface_set_role(struct wlr_surface *surface,
const struct wlr_surface_role *role, void *role_data,
struct wl_resource *error_resource, uint32_t error_code) {
assert(role != NULL);
if (surface->role != NULL && surface->role != role) {
if (error_resource != NULL) {
wl_resource_post_error(error_resource, error_code,
"Cannot assign role %s to wl_surface@%" PRIu32 ", already has role %s\n",
role->name, wl_resource_get_id(surface->resource),
surface->role->name);
}
return false;
}
if (surface->role_data != NULL && surface->role_data != role_data) {
wl_resource_post_error(error_resource, error_code,
"Cannot reassign role %s to wl_surface@%" PRIu32 ","
"role object still exists", role->name,
wl_resource_get_id(surface->resource));
return false;
}
surface->role = role;
surface->role_data = role_data;
return true;
}
uint32_t wlr_surface_lock_pending(struct wlr_surface *surface) {
surface->pending.cached_state_locks++;
return surface->pending.seq;
}
void wlr_surface_unlock_cached(struct wlr_surface *surface, uint32_t seq) {
if (surface->pending.seq == seq) {
assert(surface->pending.cached_state_locks > 0);
surface->pending.cached_state_locks--;
return;
}
bool found = false;
struct wlr_surface_state *cached;
wl_list_for_each(cached, &surface->cached, cached_state_link) {
if (cached->seq == seq) {
found = true;
break;
}
}
assert(found);
assert(cached->cached_state_locks > 0);
cached->cached_state_locks--;
if (cached->cached_state_locks != 0) {
return;
}
if (cached->cached_state_link.prev != &surface->cached) {
// This isn't the first cached state. This means we're blocked on a
// previous cached state.
return;
}
// TODO: consider merging all committed states together
struct wlr_surface_state *next, *tmp;
wl_list_for_each_safe(next, tmp, &surface->cached, cached_state_link) {
if (next->cached_state_locks > 0) {
break;
}
surface_commit_state(surface, next);
surface_state_destroy_cached(next);
}
}
static const struct wl_subsurface_interface subsurface_implementation;
static struct wlr_subsurface *subsurface_from_resource(
struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &wl_subsurface_interface,
&subsurface_implementation));
return wl_resource_get_user_data(resource);
}
static void subsurface_resource_destroy(struct wl_resource *resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
subsurface_destroy(subsurface);
}
static void subsurface_handle_destroy(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void subsurface_handle_set_position(struct wl_client *client,
struct wl_resource *resource, int32_t x, int32_t y) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
}
subsurface->pending.x = x;
subsurface->pending.y = y;
}
static struct wlr_subsurface *subsurface_find_sibling(
struct wlr_subsurface *subsurface, struct wlr_surface *surface) {
struct wlr_surface *parent = subsurface->parent;
struct wlr_subsurface *sibling;
wl_list_for_each(sibling, &parent->current.subsurfaces_below, current.link) {
if (sibling->surface == surface && sibling != subsurface) {
return sibling;
}
}
wl_list_for_each(sibling, &parent->current.subsurfaces_above, current.link) {
if (sibling->surface == surface && sibling != subsurface) {
return sibling;
}
}
return NULL;
}
static void subsurface_handle_place_above(struct wl_client *client,
struct wl_resource *resource, struct wl_resource *sibling_resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
}
struct wlr_surface *sibling_surface =
wlr_surface_from_resource(sibling_resource);
struct wl_list *node;
if (sibling_surface == subsurface->parent) {
node = &subsurface->parent->pending.subsurfaces_above;
} else {
struct wlr_subsurface *sibling =
subsurface_find_sibling(subsurface, sibling_surface);
if (!sibling) {
wl_resource_post_error(subsurface->resource,
WL_SUBSURFACE_ERROR_BAD_SURFACE,
"%s: wl_surface@%" PRIu32 "is not a parent or sibling",
"place_above", wl_resource_get_id(sibling_resource));
return;
}
node = &sibling->pending.link;
}
wl_list_remove(&subsurface->pending.link);
wl_list_insert(node, &subsurface->pending.link);
subsurface->reordered = true;
}
static void subsurface_handle_place_below(struct wl_client *client,
struct wl_resource *resource, struct wl_resource *sibling_resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
}
struct wlr_surface *sibling_surface =
wlr_surface_from_resource(sibling_resource);
struct wl_list *node;
if (sibling_surface == subsurface->parent) {
node = &subsurface->parent->pending.subsurfaces_below;
} else {
struct wlr_subsurface *sibling =
subsurface_find_sibling(subsurface, sibling_surface);
if (!sibling) {
wl_resource_post_error(subsurface->resource,
WL_SUBSURFACE_ERROR_BAD_SURFACE,
"%s: wl_surface@%" PRIu32 " is not a parent or sibling",
"place_below", wl_resource_get_id(sibling_resource));
return;
}
node = &sibling->pending.link;
}
wl_list_remove(&subsurface->pending.link);
wl_list_insert(node->prev, &subsurface->pending.link);
subsurface->reordered = true;
}
static void subsurface_handle_set_sync(struct wl_client *client,
struct wl_resource *resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
}
subsurface->synchronized = true;
}
static void subsurface_handle_set_desync(struct wl_client *client,
struct wl_resource *resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
}
if (subsurface->synchronized) {
subsurface->synchronized = false;
if (!subsurface_is_synchronized(subsurface)) {
if (subsurface->has_cache) {
wlr_surface_unlock_cached(subsurface->surface,
subsurface->cached_seq);
subsurface->has_cache = false;
subsurface->cached_seq = 0;
}
subsurface_parent_commit(subsurface, true);
}
}
}
static const struct wl_subsurface_interface subsurface_implementation = {
.destroy = subsurface_handle_destroy,
.set_position = subsurface_handle_set_position,
.place_above = subsurface_handle_place_above,
.place_below = subsurface_handle_place_below,
.set_sync = subsurface_handle_set_sync,
.set_desync = subsurface_handle_set_desync,
};
/**
* Checks if this subsurface needs to be marked as mapped. This can happen if:
* - The subsurface has a buffer
* - Its parent is mapped
*/
static void subsurface_consider_map(struct wlr_subsurface *subsurface,
bool check_parent) {
if (subsurface->mapped || !wlr_surface_has_buffer(subsurface->surface)) {
return;
}
if (check_parent) {
if (subsurface->parent == NULL) {
return;
}
if (wlr_surface_is_subsurface(subsurface->parent)) {
struct wlr_subsurface *parent =
wlr_subsurface_from_wlr_surface(subsurface->parent);
if (parent == NULL || !parent->mapped) {
return;
}
}
}
// Now we can map the subsurface
wlr_signal_emit_safe(&subsurface->events.map, subsurface);
subsurface->mapped = true;
// Try mapping all children too
struct wlr_subsurface *child;
wl_list_for_each(child, &subsurface->surface->current.subsurfaces_below,
current.link) {
subsurface_consider_map(child, false);
}
wl_list_for_each(child, &subsurface->surface->current.subsurfaces_above,
current.link) {
subsurface_consider_map(child, false);
}
}
static void subsurface_unmap(struct wlr_subsurface *subsurface) {
if (!subsurface->mapped) {
return;
}
wlr_signal_emit_safe(&subsurface->events.unmap, subsurface);
subsurface->mapped = false;
// Unmap all children
struct wlr_subsurface *child;
wl_list_for_each(child, &subsurface->surface->current.subsurfaces_below,
current.link) {
subsurface_unmap(child);
}
wl_list_for_each(child, &subsurface->surface->current.subsurfaces_above,
current.link) {
subsurface_unmap(child);
}
}
static void subsurface_role_commit(struct wlr_surface *surface) {
struct wlr_subsurface *subsurface =
wlr_subsurface_from_wlr_surface(surface);
if (subsurface == NULL) {
return;
}
if (subsurface->current.x != subsurface->pending.x ||
subsurface->current.y != subsurface->pending.y) {
// Subsurface has moved
int dx = subsurface->current.x - subsurface->pending.x;
int dy = subsurface->current.y - subsurface->pending.y;
subsurface->current.x = subsurface->pending.x;
subsurface->current.y = subsurface->pending.y;
if ((surface->current.transform & WL_OUTPUT_TRANSFORM_90) != 0) {
int tmp = dx;
dx = dy;
dy = tmp;
}
pixman_region32_union_rect(&surface->buffer_damage,
&surface->buffer_damage,
dx * surface->previous.scale, dy * surface->previous.scale,
surface->previous.buffer_width, surface->previous.buffer_height);
pixman_region32_union_rect(&surface->buffer_damage,
&surface->buffer_damage, 0, 0,
surface->current.buffer_width, surface->current.buffer_height);
}
subsurface_consider_map(subsurface, true);
}
static void subsurface_role_precommit(struct wlr_surface *surface) {
struct wlr_subsurface *subsurface =
wlr_subsurface_from_wlr_surface(surface);
if (subsurface == NULL) {
return;
}
if (surface->pending.committed & WLR_SURFACE_STATE_BUFFER &&
surface->pending.buffer_resource == NULL) {
// This is a NULL commit
subsurface_unmap(subsurface);
}
}
const struct wlr_surface_role subsurface_role = {
.name = "wl_subsurface",
.commit = subsurface_role_commit,
.precommit = subsurface_role_precommit,
};
static void subsurface_handle_parent_destroy(struct wl_listener *listener,
void *data) {
struct wlr_subsurface *subsurface =
wl_container_of(listener, subsurface, parent_destroy);
subsurface_unmap(subsurface);
wl_list_remove(&subsurface->current.link);
wl_list_remove(&subsurface->pending.link);
wl_list_remove(&subsurface->parent_destroy.link);
subsurface->parent = NULL;
}
static void subsurface_handle_surface_destroy(struct wl_listener *listener,
void *data) {
struct wlr_subsurface *subsurface =
wl_container_of(listener, subsurface, surface_destroy);
subsurface_destroy(subsurface);
}
struct wlr_subsurface *subsurface_create(struct wlr_surface *surface,
struct wlr_surface *parent, uint32_t version, uint32_t id) {
struct wl_client *client = wl_resource_get_client(surface->resource);
struct wlr_subsurface *subsurface =
calloc(1, sizeof(struct wlr_subsurface));
if (!subsurface) {
wl_client_post_no_memory(client);
return NULL;
}
subsurface->synchronized = true;
subsurface->surface = surface;
subsurface->resource =
wl_resource_create(client, &wl_subsurface_interface, version, id);
if (subsurface->resource == NULL) {
free(subsurface);
wl_client_post_no_memory(client);
return NULL;
}
wl_resource_set_implementation(subsurface->resource,
&subsurface_implementation, subsurface, subsurface_resource_destroy);
wl_signal_init(&subsurface->events.destroy);
wl_signal_init(&subsurface->events.map);
wl_signal_init(&subsurface->events.unmap);
wl_signal_add(&surface->events.destroy, &subsurface->surface_destroy);
subsurface->surface_destroy.notify = subsurface_handle_surface_destroy;
// link parent
subsurface->parent = parent;
wl_signal_add(&parent->events.destroy, &subsurface->parent_destroy);
subsurface->parent_destroy.notify = subsurface_handle_parent_destroy;
wl_list_insert(parent->current.subsurfaces_above.prev, &subsurface->current.link);
wl_list_insert(parent->pending.subsurfaces_above.prev,
&subsurface->pending.link);
surface->role_data = subsurface;
wlr_signal_emit_safe(&parent->events.new_subsurface, subsurface);
return subsurface;
}
struct wlr_surface *wlr_surface_get_root_surface(struct wlr_surface *surface) {
while (wlr_surface_is_subsurface(surface)) {
struct wlr_subsurface *subsurface =
wlr_subsurface_from_wlr_surface(surface);
if (subsurface == NULL) {
break;
}
if (subsurface->parent == NULL) {
return NULL;
}
surface = subsurface->parent;
}
return surface;
}
bool wlr_surface_point_accepts_input(struct wlr_surface *surface,
double sx, double sy) {
return sx >= 0 && sx < surface->current.width &&
sy >= 0 && sy < surface->current.height &&
pixman_region32_contains_point(&surface->current.input, floor(sx), floor(sy), NULL);
}
struct wlr_surface *wlr_surface_surface_at(struct wlr_surface *surface,
double sx, double sy, double *sub_x, double *sub_y) {
struct wlr_subsurface *subsurface;
wl_list_for_each_reverse(subsurface, &surface->current.subsurfaces_above,
current.link) {
double _sub_x = subsurface->current.x;
double _sub_y = subsurface->current.y;
struct wlr_surface *sub = wlr_surface_surface_at(subsurface->surface,
sx - _sub_x, sy - _sub_y, sub_x, sub_y);
if (sub != NULL) {
return sub;
}
}
if (wlr_surface_point_accepts_input(surface, sx, sy)) {
if (sub_x) {
*sub_x = sx;
}
if (sub_y) {
*sub_y = sy;
}
return surface;
}
wl_list_for_each_reverse(subsurface, &surface->current.subsurfaces_below,
current.link) {
double _sub_x = subsurface->current.x;
double _sub_y = subsurface->current.y;
struct wlr_surface *sub = wlr_surface_surface_at(subsurface->surface,
sx - _sub_x, sy - _sub_y, sub_x, sub_y);
if (sub != NULL) {
return sub;
}
}
return NULL;
}
static void surface_output_destroy(struct wlr_surface_output *surface_output) {
wl_list_remove(&surface_output->bind.link);
wl_list_remove(&surface_output->destroy.link);
wl_list_remove(&surface_output->link);
free(surface_output);
}
static void surface_handle_output_bind(struct wl_listener *listener,
void *data) {
struct wlr_output_event_bind *evt = data;
struct wlr_surface_output *surface_output =
wl_container_of(listener, surface_output, bind);
struct wl_client *client = wl_resource_get_client(
surface_output->surface->resource);
if (client == wl_resource_get_client(evt->resource)) {
wl_surface_send_enter(surface_output->surface->resource, evt->resource);
}
}
static void surface_handle_output_destroy(struct wl_listener *listener,
void *data) {
struct wlr_surface_output *surface_output =
wl_container_of(listener, surface_output, destroy);
surface_output_destroy(surface_output);
}
void wlr_surface_send_enter(struct wlr_surface *surface,
struct wlr_output *output) {
struct wl_client *client = wl_resource_get_client(surface->resource);
struct wlr_surface_output *surface_output;
struct wl_resource *resource;
wl_list_for_each(surface_output, &surface->current_outputs, link) {
if (surface_output->output == output) {
return;
}
}
surface_output = calloc(1, sizeof(struct wlr_surface_output));
if (surface_output == NULL) {
return;
}
surface_output->bind.notify = surface_handle_output_bind;
surface_output->destroy.notify = surface_handle_output_destroy;
wl_signal_add(&output->events.bind, &surface_output->bind);
wl_signal_add(&output->events.destroy, &surface_output->destroy);
surface_output->surface = surface;
surface_output->output = output;
wl_list_insert(&surface->current_outputs, &surface_output->link);
wl_resource_for_each(resource, &output->resources) {
if (client == wl_resource_get_client(resource)) {
wl_surface_send_enter(surface->resource, resource);
}
}
}
void wlr_surface_send_leave(struct wlr_surface *surface,
struct wlr_output *output) {
struct wl_client *client = wl_resource_get_client(surface->resource);
struct wlr_surface_output *surface_output, *tmp;
struct wl_resource *resource;
wl_list_for_each_safe(surface_output, tmp,
&surface->current_outputs, link) {
if (surface_output->output == output) {
surface_output_destroy(surface_output);
wl_resource_for_each(resource, &output->resources) {
if (client == wl_resource_get_client(resource)) {
wl_surface_send_leave(surface->resource, resource);
}
}
break;
}
}
}
void wlr_surface_send_frame_done(struct wlr_surface *surface,
const struct timespec *when) {
struct wl_resource *resource, *tmp;
wl_resource_for_each_safe(resource, tmp,
&surface->current.frame_callback_list) {
wl_callback_send_done(resource, timespec_to_msec(when));
wl_resource_destroy(resource);
}
}
static void surface_for_each_surface(struct wlr_surface *surface, int x, int y,
wlr_surface_iterator_func_t iterator, void *user_data) {
struct wlr_subsurface *subsurface;
wl_list_for_each(subsurface, &surface->current.subsurfaces_below, current.link) {
struct wlr_subsurface_parent_state *state = &subsurface->current;
int sx = state->x;
int sy = state->y;
surface_for_each_surface(subsurface->surface, x + sx, y + sy,
iterator, user_data);
}
iterator(surface, x, y, user_data);
wl_list_for_each(subsurface, &surface->current.subsurfaces_above, current.link) {
struct wlr_subsurface_parent_state *state = &subsurface->current;
int sx = state->x;
int sy = state->y;
surface_for_each_surface(subsurface->surface, x + sx, y + sy,
iterator, user_data);
}
}
void wlr_surface_for_each_surface(struct wlr_surface *surface,
wlr_surface_iterator_func_t iterator, void *user_data) {
surface_for_each_surface(surface, 0, 0, iterator, user_data);
}
struct bound_acc {
int32_t min_x, min_y;
int32_t max_x, max_y;
};
static void handle_bounding_box_surface(struct wlr_surface *surface,
int x, int y, void *data) {
struct bound_acc *acc = data;
acc->min_x = min(x, acc->min_x);
acc->min_y = min(y, acc->min_y);
acc->max_x = max(x + surface->current.width, acc->max_x);
acc->max_y = max(y + surface->current.height, acc->max_y);
}
void wlr_surface_get_extends(struct wlr_surface *surface, struct wlr_box *box) {
struct bound_acc acc = {
.min_x = 0,
.min_y = 0,
.max_x = surface->current.width,
.max_y = surface->current.height,
};
wlr_surface_for_each_surface(surface, handle_bounding_box_surface, &acc);
box->x = acc.min_x;
box->y = acc.min_y;
box->width = acc.max_x - acc.min_x;
box->height = acc.max_y - acc.min_y;
}
static void crop_region(pixman_region32_t *dst, pixman_region32_t *src,
const struct wlr_box *box) {
pixman_region32_intersect_rect(dst, src,
box->x, box->y, box->width, box->height);
pixman_region32_translate(dst, -box->x, -box->y);
}
void wlr_surface_get_effective_damage(struct wlr_surface *surface,
pixman_region32_t *damage) {
pixman_region32_clear(damage);
// Transform and copy the buffer damage in terms of surface coordinates.
wlr_region_transform(damage, &surface->buffer_damage,
surface->current.transform, surface->current.buffer_width,
surface->current.buffer_height);
wlr_region_scale(damage, damage, 1.0 / (float)surface->current.scale);
if (surface->current.viewport.has_src) {
struct wlr_box src_box = {
.x = floor(surface->current.viewport.src.x),
.y = floor(surface->current.viewport.src.y),
.width = ceil(surface->current.viewport.src.width),
.height = ceil(surface->current.viewport.src.height),
};
crop_region(damage, damage, &src_box);
}
if (surface->current.viewport.has_dst) {
int src_width, src_height;
surface_state_viewport_src_size(&surface->current,
&src_width, &src_height);
float scale_x = (float)surface->current.viewport.dst_width / src_width;
float scale_y = (float)surface->current.viewport.dst_height / src_height;
wlr_region_scale_xy(damage, damage, scale_x, scale_y);
}
// On resize, damage the previous bounds of the surface. The current bounds
// have already been damaged in surface_update_damage.
if (surface->previous.width > surface->current.width ||
surface->previous.height > surface->current.height) {
pixman_region32_union_rect(damage, damage, 0, 0,
surface->previous.width, surface->previous.height);
}
// On move, damage where the surface was with its old dimensions.
if (surface->current.dx != 0 || surface->current.dy != 0) {
int prev_x = -surface->current.dx;
int prev_y = -surface->current.dy;
if ((surface->previous.transform & WL_OUTPUT_TRANSFORM_90) != 0) {
int temp = prev_x;
prev_x = prev_y;
prev_y = temp;
}
pixman_region32_union_rect(damage, damage, prev_x, prev_y,
surface->previous.width, surface->previous.height);
}
}
void wlr_surface_get_buffer_source_box(struct wlr_surface *surface,
struct wlr_fbox *box) {
box->x = box->y = 0;
box->width = surface->current.buffer_width;
box->height = surface->current.buffer_height;
if (surface->current.viewport.has_src) {
box->x = surface->current.viewport.src.x * surface->current.scale;
box->y = surface->current.viewport.src.y * surface->current.scale;
box->width = surface->current.viewport.src.width * surface->current.scale;
box->height = surface->current.viewport.src.height * surface->current.scale;
wlr_fbox_transform(box, box, surface->current.transform,
surface->current.buffer_width, surface->current.buffer_height);
}
}