wlroots/types/wlr_surface.c

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#include <assert.h>
#include <stdlib.h>
#include <wayland-server.h>
#include <wlr/render/egl.h>
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#include <wlr/render/interface.h>
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#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_linux_dmabuf.h>
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#include <wlr/types/wlr_matrix.h>
#include <wlr/types/wlr_region.h>
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#include <wlr/types/wlr_surface.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
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#include "util/signal.h"
#define CALLBACK_VERSION 1
#define SURFACE_VERSION 4
#define SUBSURFACE_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) {
wl_list_remove(&state->buffer_destroy_listener.link);
state->buffer = 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_listener);
surface_state_reset_buffer(state);
}
static void surface_state_release_buffer(struct wlr_surface_state *state) {
if (state->buffer) {
wl_buffer_send_release(state->buffer);
surface_state_reset_buffer(state);
}
}
static void surface_state_set_buffer(struct wlr_surface_state *state,
struct wl_resource *buffer) {
surface_state_reset_buffer(state);
state->buffer = buffer;
if (buffer) {
wl_resource_add_destroy_listener(buffer,
&state->buffer_destroy_listener);
state->buffer_destroy_listener.notify = surface_handle_buffer_destroy;
}
}
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static void surface_destroy(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void surface_attach(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *buffer, int32_t sx, int32_t sy) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
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surface->pending->invalid |= WLR_SURFACE_INVALID_BUFFER;
surface->pending->sx = sx;
surface->pending->sy = sy;
surface_state_set_buffer(surface->pending, buffer);
}
static void surface_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;
}
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surface->pending->invalid |= WLR_SURFACE_INVALID_SURFACE_DAMAGE;
pixman_region32_union_rect(&surface->pending->surface_damage,
&surface->pending->surface_damage,
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x, y, width, height);
}
static struct wlr_frame_callback *frame_callback_from_resource(
struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &wl_callback_interface, NULL));
return wl_resource_get_user_data(resource);
}
static void callback_handle_resource_destroy(struct wl_resource *resource) {
struct wlr_frame_callback *cb = frame_callback_from_resource(resource);
wl_list_remove(&cb->link);
free(cb);
}
static void surface_frame(struct wl_client *client,
struct wl_resource *resource, uint32_t callback) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
struct wlr_frame_callback *cb =
calloc(1, sizeof(struct wlr_frame_callback));
if (cb == NULL) {
wl_resource_post_no_memory(resource);
return;
}
cb->resource = wl_resource_create(client, &wl_callback_interface,
CALLBACK_VERSION, callback);
if (cb->resource == NULL) {
free(cb);
wl_resource_post_no_memory(resource);
return;
}
wl_resource_set_implementation(cb->resource, NULL, cb,
callback_handle_resource_destroy);
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wl_list_insert(surface->pending->frame_callback_list.prev, &cb->link);
surface->pending->invalid |= WLR_SURFACE_INVALID_FRAME_CALLBACK_LIST;
}
static void surface_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);
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if ((surface->pending->invalid & WLR_SURFACE_INVALID_OPAQUE_REGION)) {
pixman_region32_clear(&surface->pending->opaque);
}
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surface->pending->invalid |= WLR_SURFACE_INVALID_OPAQUE_REGION;
if (region_resource) {
pixman_region32_t *region = wlr_region_from_resource(region_resource);
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pixman_region32_copy(&surface->pending->opaque, region);
} else {
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pixman_region32_clear(&surface->pending->opaque);
}
}
static void surface_set_input_region(struct wl_client *client,
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struct wl_resource *resource, struct wl_resource *region_resource) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
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surface->pending->invalid |= WLR_SURFACE_INVALID_INPUT_REGION;
if (region_resource) {
pixman_region32_t *region = wlr_region_from_resource(region_resource);
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pixman_region32_copy(&surface->pending->input, region);
} else {
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pixman_region32_fini(&surface->pending->input);
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pixman_region32_init_rect(&surface->pending->input,
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INT32_MIN, INT32_MIN, UINT32_MAX, UINT32_MAX);
}
}
static bool surface_update_size(struct wlr_surface *surface,
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struct wlr_surface_state *state) {
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if (!state->buffer) {
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pixman_region32_union_rect(&state->surface_damage,
&state->surface_damage, 0, 0, state->width, state->height);
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state->height = 0;
state->width = 0;
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return true;
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}
int scale = state->scale;
enum wl_output_transform transform = state->transform;
struct wl_shm_buffer *buf = wl_shm_buffer_get(state->buffer);
if (buf != NULL) {
state->buffer_width = wl_shm_buffer_get_width(buf);
state->buffer_height = wl_shm_buffer_get_height(buf);
} else if (wlr_renderer_resource_is_wl_drm_buffer(surface->renderer,
state->buffer)) {
wlr_renderer_wl_drm_buffer_get_size(surface->renderer, state->buffer,
&state->buffer_width, &state->buffer_height);
} else if (wlr_dmabuf_resource_is_buffer(state->buffer)) {
struct wlr_dmabuf_buffer *dmabuf =
wlr_dmabuf_buffer_from_buffer_resource(state->buffer);
state->buffer_width = dmabuf->attributes.width;
state->buffer_height = dmabuf->attributes.height;
} else {
wlr_log(L_ERROR, "Unknown buffer handle attached");
state->buffer_width = 0;
state->buffer_height = 0;
}
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int width = state->buffer_width / scale;
int height = state->buffer_height / scale;
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if (transform == WL_OUTPUT_TRANSFORM_90 ||
transform == WL_OUTPUT_TRANSFORM_270 ||
transform == WL_OUTPUT_TRANSFORM_FLIPPED_90 ||
transform == WL_OUTPUT_TRANSFORM_FLIPPED_270) {
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int tmp = width;
width = height;
height = tmp;
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}
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bool update_damage = false;
if (width != state->width || height != state->height) {
// Damage the whole surface on resize
// This isn't in the spec, but Weston does it and QT expects it
pixman_region32_union_rect(&state->surface_damage,
&state->surface_damage, 0, 0, state->width, state->height);
pixman_region32_union_rect(&state->surface_damage,
&state->surface_damage, 0, 0, width, height);
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update_damage = true;
}
state->width = width;
state->height = height;
return update_damage;
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}
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/**
* Append pending state to current state and clear pending state.
*/
static void surface_move_state(struct wlr_surface *surface,
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struct wlr_surface_state *next, struct wlr_surface_state *state) {
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bool update_damage = false;
bool update_size = false;
int oldw = state->width;
int oldh = state->height;
if ((next->invalid & WLR_SURFACE_INVALID_SCALE)) {
state->scale = next->scale;
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update_size = true;
}
if ((next->invalid & WLR_SURFACE_INVALID_TRANSFORM)) {
state->transform = next->transform;
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update_size = true;
}
if ((next->invalid & WLR_SURFACE_INVALID_BUFFER)) {
surface_state_release_buffer(state);
surface_state_set_buffer(state, next->buffer);
surface_state_reset_buffer(next);
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state->sx = next->sx;
state->sy = next->sy;
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update_size = true;
}
if (update_size) {
update_damage = surface_update_size(surface, state);
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}
if ((next->invalid & WLR_SURFACE_INVALID_SURFACE_DAMAGE)) {
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pixman_region32_intersect_rect(&next->surface_damage,
&next->surface_damage, 0, 0, state->width, state->height);
pixman_region32_union(&state->surface_damage, &state->surface_damage,
&next->surface_damage);
pixman_region32_clear(&next->surface_damage);
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update_damage = true;
}
if ((next->invalid & WLR_SURFACE_INVALID_BUFFER_DAMAGE)) {
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pixman_region32_intersect_rect(&next->buffer_damage,
&next->buffer_damage, 0, 0, state->buffer_width,
state->buffer_height);
pixman_region32_union(&state->buffer_damage, &state->buffer_damage,
&next->buffer_damage);
pixman_region32_clear(&next->buffer_damage);
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update_damage = true;
}
if (update_damage) {
pixman_region32_t buffer_damage, surface_damage;
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pixman_region32_init(&buffer_damage);
pixman_region32_init(&surface_damage);
// Surface to buffer damage
pixman_region32_copy(&buffer_damage, &state->surface_damage);
wlr_region_transform(&buffer_damage, &buffer_damage,
wlr_output_transform_invert(state->transform),
state->width, state->height);
wlr_region_scale(&buffer_damage, &buffer_damage, state->scale);
// Buffer to surface damage
pixman_region32_copy(&surface_damage, &state->buffer_damage);
wlr_region_transform(&surface_damage, &surface_damage, state->transform,
state->buffer_width, state->buffer_height);
wlr_region_scale(&surface_damage, &surface_damage, 1.0f/state->scale);
pixman_region32_union(&state->buffer_damage, &state->buffer_damage,
&buffer_damage);
pixman_region32_union(&state->surface_damage, &state->surface_damage,
&surface_damage);
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pixman_region32_fini(&buffer_damage);
pixman_region32_fini(&surface_damage);
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}
if ((next->invalid & WLR_SURFACE_INVALID_OPAQUE_REGION)) {
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// TODO: process buffer
pixman_region32_clear(&next->opaque);
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}
if ((next->invalid & WLR_SURFACE_INVALID_INPUT_REGION)) {
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// TODO: process buffer
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pixman_region32_copy(&state->input, &next->input);
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}
if ((next->invalid & WLR_SURFACE_INVALID_SUBSURFACE_POSITION)) {
// Subsurface has moved
int dx = state->subsurface_position.x - next->subsurface_position.x;
int dy = state->subsurface_position.y - next->subsurface_position.y;
state->subsurface_position.x = next->subsurface_position.x;
state->subsurface_position.y = next->subsurface_position.y;
next->subsurface_position.x = 0;
next->subsurface_position.y = 0;
if (dx != 0 || dy != 0) {
pixman_region32_union_rect(&state->surface_damage,
&state->surface_damage, dx, dy, oldw, oldh);
pixman_region32_union_rect(&state->surface_damage,
&state->surface_damage, 0, 0, state->width, state->height);
}
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}
if ((next->invalid & WLR_SURFACE_INVALID_FRAME_CALLBACK_LIST)) {
wl_list_insert_list(&state->frame_callback_list,
&next->frame_callback_list);
wl_list_init(&next->frame_callback_list);
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}
state->invalid |= next->invalid;
next->invalid = 0;
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}
static void surface_damage_subsurfaces(struct wlr_subsurface *subsurface) {
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// 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->current->surface_damage,
&surface->current->surface_damage,
0, 0, surface->current->width,
surface->current->height);
subsurface->reordered = false;
struct wlr_subsurface *child;
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wl_list_for_each(child, &subsurface->surface->subsurfaces, parent_link) {
surface_damage_subsurfaces(child);
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}
}
static void surface_apply_damage(struct wlr_surface *surface,
bool invalid_buffer, bool reupload_buffer) {
struct wl_resource *resource = surface->current->buffer;
if (resource == NULL) {
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return;
}
struct wl_shm_buffer *buf = wl_shm_buffer_get(resource);
if (buf != NULL) {
wl_shm_buffer_begin_access(buf);
enum wl_shm_format fmt = wl_shm_buffer_get_format(buf);
int32_t stride = wl_shm_buffer_get_stride(buf);
int32_t width = wl_shm_buffer_get_width(buf);
int32_t height = wl_shm_buffer_get_height(buf);
void *data = wl_shm_buffer_get_data(buf);
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if (surface->texture == NULL || reupload_buffer) {
wlr_texture_destroy(surface->texture);
surface->texture = wlr_texture_from_pixels(surface->renderer, fmt,
stride, width, height, data);
} else {
pixman_region32_t damage;
pixman_region32_init(&damage);
pixman_region32_copy(&damage, &surface->current->buffer_damage);
pixman_region32_intersect_rect(&damage, &damage, 0, 0,
surface->current->buffer_width,
surface->current->buffer_height);
int n;
pixman_box32_t *rects = pixman_region32_rectangles(&damage, &n);
for (int i = 0; i < n; ++i) {
pixman_box32_t *r = &rects[i];
if (!wlr_texture_write_pixels(surface->texture, fmt, stride,
r->x2 - r->x1, r->y2 - r->y1, r->x1, r->y1,
r->x1, r->y1, data)) {
break;
}
}
pixman_region32_fini(&damage);
}
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wl_shm_buffer_end_access(buf);
// We've uploaded the wl_shm_buffer data to the GPU, we won't access the
// wl_buffer anymore
surface_state_release_buffer(surface->current);
} else if (invalid_buffer || reupload_buffer) {
wlr_texture_destroy(surface->texture);
if (wlr_renderer_resource_is_wl_drm_buffer(surface->renderer, resource)) {
surface->texture =
wlr_texture_from_wl_drm(surface->renderer, resource);
} else if (wlr_dmabuf_resource_is_buffer(resource)) {
struct wlr_dmabuf_buffer *dmabuf =
wlr_dmabuf_buffer_from_buffer_resource(resource);
surface->texture =
wlr_texture_from_dmabuf(surface->renderer, &dmabuf->attributes);
} else {
surface->texture = NULL;
wlr_log(L_ERROR, "Unknown buffer handle attached");
}
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// Don't release the wl_buffer yet: since the texture is shared with the
// client, we'll access the wl_buffer when rendering
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}
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}
static void surface_commit_pending(struct wlr_surface *surface) {
int32_t oldw = surface->current->buffer_width;
int32_t oldh = surface->current->buffer_height;
bool invalid_buffer = surface->pending->invalid & WLR_SURFACE_INVALID_BUFFER;
bool null_buffer_commit = invalid_buffer && surface->pending->buffer == NULL;
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surface_move_state(surface, surface->pending, surface->current);
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if (null_buffer_commit) {
wlr_texture_destroy(surface->texture);
surface->texture = NULL;
}
bool reupload_buffer = oldw != surface->current->buffer_width ||
oldh != surface->current->buffer_height;
surface_apply_damage(surface, invalid_buffer, reupload_buffer);
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// commit subsurface order
struct wlr_subsurface *subsurface;
wl_list_for_each_reverse(subsurface, &surface->subsurface_pending_list,
parent_pending_link) {
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wl_list_remove(&subsurface->parent_link);
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wl_list_insert(&surface->subsurfaces, &subsurface->parent_link);
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if (subsurface->reordered) {
// TODO: damage all the subsurfaces
surface_damage_subsurfaces(subsurface);
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}
}
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if (surface->role_committed) {
surface->role_committed(surface, surface->role_data);
}
// TODO: add the invalid bitfield to this callback
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wlr_signal_emit_safe(&surface->events.commit, surface);
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pixman_region32_clear(&surface->current->surface_damage);
pixman_region32_clear(&surface->current->buffer_damage);
}
static bool subsurface_is_synchronized(struct wlr_subsurface *subsurface) {
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while (1) {
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if (subsurface->synchronized) {
return true;
}
if (!subsurface->parent) {
return false;
}
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if (!wlr_surface_is_subsurface(subsurface->parent)) {
break;
}
subsurface = wlr_subsurface_from_surface(subsurface->parent);
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}
return false;
}
/**
* Recursive function to commit the effectively synchronized children.
*/
static void subsurface_parent_commit(struct wlr_subsurface *subsurface,
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bool synchronized) {
struct wlr_surface *surface = subsurface->surface;
if (synchronized || subsurface->synchronized) {
if (subsurface->has_cache) {
surface_move_state(surface, subsurface->cached, surface->pending);
surface_commit_pending(surface);
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subsurface->has_cache = false;
subsurface->cached->invalid = 0;
}
struct wlr_subsurface *tmp;
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wl_list_for_each(tmp, &surface->subsurfaces, parent_link) {
subsurface_parent_commit(tmp, true);
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}
}
}
static void subsurface_commit(struct wlr_subsurface *subsurface) {
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struct wlr_surface *surface = subsurface->surface;
if (subsurface_is_synchronized(subsurface)) {
surface_move_state(surface, surface->pending, subsurface->cached);
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subsurface->has_cache = true;
} else {
if (subsurface->has_cache) {
surface_move_state(surface, subsurface->cached, surface->pending);
surface_commit_pending(surface);
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subsurface->has_cache = false;
} else {
surface_commit_pending(surface);
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}
struct wlr_subsurface *tmp;
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wl_list_for_each(tmp, &surface->subsurfaces, parent_link) {
subsurface_parent_commit(tmp, false);
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}
}
}
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static void surface_commit(struct wl_client *client,
struct wl_resource *resource) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
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if (wlr_surface_is_subsurface(surface)) {
struct wlr_subsurface *subsurface =
wlr_subsurface_from_surface(surface);
subsurface_commit(subsurface);
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return;
}
surface_commit_pending(surface);
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struct wlr_subsurface *tmp;
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wl_list_for_each(tmp, &surface->subsurfaces, parent_link) {
subsurface_parent_commit(tmp, false);
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}
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}
static void surface_set_buffer_transform(struct wl_client *client,
struct wl_resource *resource, int transform) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
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surface->pending->invalid |= WLR_SURFACE_INVALID_TRANSFORM;
surface->pending->transform = transform;
}
static void surface_set_buffer_scale(struct wl_client *client,
struct wl_resource *resource,
int32_t scale) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
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surface->pending->invalid |= WLR_SURFACE_INVALID_SCALE;
surface->pending->scale = scale;
}
static void surface_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);
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if (width < 0 || height < 0) {
return;
}
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surface->pending->invalid |= WLR_SURFACE_INVALID_BUFFER_DAMAGE;
pixman_region32_union_rect(&surface->pending->buffer_damage,
&surface->pending->buffer_damage,
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x, y, width, height);
}
static const struct wl_surface_interface surface_interface = {
.destroy = surface_destroy,
.attach = surface_attach,
.damage = surface_damage,
.frame = surface_frame,
.set_opaque_region = surface_set_opaque_region,
.set_input_region = surface_set_input_region,
.commit = surface_commit,
.set_buffer_transform = surface_set_buffer_transform,
.set_buffer_scale = surface_set_buffer_scale,
.damage_buffer = surface_damage_buffer
};
struct wlr_surface *wlr_surface_from_resource(struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &wl_surface_interface,
&surface_interface));
return wl_resource_get_user_data(resource);
}
static struct wlr_surface_state *surface_state_create(void) {
struct wlr_surface_state *state =
calloc(1, sizeof(struct wlr_surface_state));
if (state == NULL) {
return NULL;
}
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state->scale = 1;
state->transform = WL_OUTPUT_TRANSFORM_NORMAL;
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wl_list_init(&state->frame_callback_list);
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pixman_region32_init(&state->surface_damage);
pixman_region32_init(&state->buffer_damage);
pixman_region32_init(&state->opaque);
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pixman_region32_init_rect(&state->input,
INT32_MIN, INT32_MIN, UINT32_MAX, UINT32_MAX);
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return state;
}
static void surface_state_destroy(struct wlr_surface_state *state) {
surface_state_reset_buffer(state);
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struct wlr_frame_callback *cb, *tmp;
wl_list_for_each_safe(cb, tmp, &state->frame_callback_list, link) {
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wl_resource_destroy(cb->resource);
}
pixman_region32_fini(&state->surface_damage);
pixman_region32_fini(&state->buffer_damage);
pixman_region32_fini(&state->opaque);
pixman_region32_fini(&state->input);
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free(state);
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}
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static void subsurface_destroy(struct wlr_subsurface *subsurface) {
if (subsurface == NULL) {
return;
}
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wlr_signal_emit_safe(&subsurface->events.destroy, subsurface);
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wl_list_remove(&subsurface->surface_destroy.link);
surface_state_destroy(subsurface->cached);
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if (subsurface->parent) {
wl_list_remove(&subsurface->parent_link);
wl_list_remove(&subsurface->parent_pending_link);
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wl_list_remove(&subsurface->parent_destroy.link);
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}
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wl_resource_set_user_data(subsurface->resource, NULL);
if (subsurface->surface) {
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subsurface->surface->role_data = NULL;
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}
free(subsurface);
}
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static void surface_handle_resource_destroy(struct wl_resource *resource) {
struct wlr_surface *surface = wlr_surface_from_resource(resource);
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wlr_signal_emit_safe(&surface->events.destroy, surface);
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wl_list_remove(wl_resource_get_link(surface->resource));
wl_list_remove(&surface->renderer_destroy.link);
wlr_texture_destroy(surface->texture);
surface_state_destroy(surface->pending);
surface_state_destroy(surface->current);
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free(surface);
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}
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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 *wlr_surface_create(struct wl_client *client,
uint32_t version, uint32_t id, struct wlr_renderer *renderer,
struct wl_list *resource_list) {
assert(version <= SURFACE_VERSION);
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_interface,
surface, surface_handle_resource_destroy);
wlr_log(L_DEBUG, "New wlr_surface %p (res %p)", surface, surface->resource);
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surface->renderer = renderer;
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surface->current = surface_state_create();
surface->pending = surface_state_create();
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wl_signal_init(&surface->events.commit);
wl_signal_init(&surface->events.destroy);
wl_signal_init(&surface->events.new_subsurface);
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wl_list_init(&surface->subsurfaces);
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wl_list_init(&surface->subsurface_pending_list);
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wl_signal_add(&renderer->events.destroy, &surface->renderer_destroy);
surface->renderer_destroy.notify = surface_handle_renderer_destroy;
struct wl_list *resource_link = wl_resource_get_link(surface->resource);
if (resource_list != NULL) {
wl_list_insert(resource_list, resource_link);
} else {
wl_list_init(resource_link);
}
return surface;
}
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bool wlr_surface_has_buffer(struct wlr_surface *surface) {
return surface->texture != NULL;
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}
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int wlr_surface_set_role(struct wlr_surface *surface, const char *role,
struct wl_resource *error_resource, uint32_t error_code) {
assert(role);
if (surface->role == NULL ||
surface->role == role ||
strcmp(surface->role, role) == 0) {
surface->role = role;
return 0;
}
wl_resource_post_error(error_resource, error_code,
"Cannot assign role %s to wl_surface@%d, already has role %s\n",
role,
wl_resource_get_id(surface->resource),
surface->role);
return -1;
}
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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);
}
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static void subsurface_resource_destroy(struct wl_resource *resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
wl_list_remove(wl_resource_get_link(resource));
subsurface_destroy(subsurface);
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}
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static void subsurface_handle_destroy(struct wl_client *client,
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struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void subsurface_handle_set_position(struct wl_client *client,
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struct wl_resource *resource, int32_t x, int32_t y) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
}
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struct wlr_surface *surface = subsurface->surface;
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surface->pending->invalid |= WLR_SURFACE_INVALID_SUBSURFACE_POSITION;
surface->pending->subsurface_position.x = x;
surface->pending->subsurface_position.y = y;
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}
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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;
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wl_list_for_each(sibling, &parent->subsurfaces, parent_link) {
if (sibling->surface == surface && sibling != subsurface) {
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return sibling;
}
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}
return NULL;
}
static void subsurface_handle_place_above(struct wl_client *client,
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struct wl_resource *resource, struct wl_resource *sibling_resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
}
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struct wlr_surface *sibling_surface =
wlr_surface_from_resource(sibling_resource);
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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@%d is not a parent or sibling",
"place_above", wl_resource_get_id(sibling_surface->resource));
return;
}
wl_list_remove(&subsurface->parent_pending_link);
wl_list_insert(&sibling->parent_pending_link,
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&subsurface->parent_pending_link);
subsurface->reordered = true;
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}
static void subsurface_handle_place_below(struct wl_client *client,
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struct wl_resource *resource, struct wl_resource *sibling_resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
}
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struct wlr_surface *sibling_surface =
wlr_surface_from_resource(sibling_resource);
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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@%d is not a parent or sibling",
"place_below", wl_resource_get_id(sibling_surface->resource));
return;
}
wl_list_remove(&subsurface->parent_pending_link);
wl_list_insert(sibling->parent_pending_link.prev,
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&subsurface->parent_pending_link);
subsurface->reordered = true;
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}
static void subsurface_handle_set_sync(struct wl_client *client,
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struct wl_resource *resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
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}
subsurface->synchronized = true;
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}
static void subsurface_handle_set_desync(struct wl_client *client,
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struct wl_resource *resource) {
struct wlr_subsurface *subsurface = subsurface_from_resource(resource);
if (subsurface == NULL) {
return;
}
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if (subsurface->synchronized) {
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subsurface->synchronized = false;
if (!subsurface_is_synchronized(subsurface)) {
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// TODO: do a synchronized commit to flush the cache
subsurface_parent_commit(subsurface, true);
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}
}
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}
static const struct wl_subsurface_interface subsurface_implementation = {
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.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,
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};
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static void subsurface_handle_parent_destroy(struct wl_listener *listener,
void *data) {
struct wlr_subsurface *subsurface =
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wl_container_of(listener, subsurface, parent_destroy);
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wl_list_remove(&subsurface->parent_link);
wl_list_remove(&subsurface->parent_pending_link);
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wl_list_remove(&subsurface->parent_destroy.link);
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subsurface->parent = NULL;
}
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static void subsurface_handle_surface_destroy(struct wl_listener *listener,
void *data) {
struct wlr_subsurface *subsurface =
wl_container_of(listener, subsurface, surface_destroy);
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subsurface_destroy(subsurface);
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}
struct wlr_subsurface *wlr_subsurface_create(struct wlr_surface *surface,
struct wlr_surface *parent, uint32_t version, uint32_t id,
struct wl_list *resource_list) {
assert(version <= SUBSURFACE_VERSION);
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struct wl_client *client = wl_resource_get_client(surface->resource);
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struct wlr_subsurface *subsurface =
calloc(1, sizeof(struct wlr_subsurface));
if (!subsurface) {
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wl_client_post_no_memory(client);
return NULL;
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}
subsurface->cached = surface_state_create();
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if (subsurface->cached == NULL) {
free(subsurface);
wl_client_post_no_memory(client);
return NULL;
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}
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subsurface->synchronized = true;
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subsurface->surface = surface;
subsurface->resource =
wl_resource_create(client, &wl_subsurface_interface, version, id);
if (subsurface->resource == NULL) {
surface_state_destroy(subsurface->cached);
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);
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wl_signal_add(&surface->events.destroy, &subsurface->surface_destroy);
subsurface->surface_destroy.notify = subsurface_handle_surface_destroy;
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// link parent
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subsurface->parent = parent;
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wl_signal_add(&parent->events.destroy, &subsurface->parent_destroy);
subsurface->parent_destroy.notify = subsurface_handle_parent_destroy;
wl_list_insert(parent->subsurfaces.prev, &subsurface->parent_link);
wl_list_insert(parent->subsurface_pending_list.prev,
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&subsurface->parent_pending_link);
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surface->role_data = subsurface;
struct wl_list *resource_link = wl_resource_get_link(subsurface->resource);
if (resource_list != NULL) {
wl_list_insert(resource_list, resource_link);
} else {
wl_list_init(resource_link);
}
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wlr_signal_emit_safe(&parent->events.new_subsurface, subsurface);
return subsurface;
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}
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struct wlr_surface *wlr_surface_get_root_surface(struct wlr_surface *surface) {
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while (wlr_surface_is_subsurface(surface)) {
struct wlr_subsurface *subsurface =
wlr_subsurface_from_surface(surface);
surface = subsurface->parent;
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}
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return surface;
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}
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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, sx, 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->subsurfaces, parent_link) {
double _sub_x = subsurface->surface->current->subsurface_position.x;
double _sub_y = subsurface->surface->current->subsurface_position.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)) {
*sub_x = sx;
*sub_y = sy;
return surface;
}
return NULL;
}
void wlr_surface_send_enter(struct wlr_surface *surface,
struct wlr_output *output) {
struct wl_client *client = wl_resource_get_client(surface->resource);
struct wl_resource *resource;
wl_resource_for_each(resource, &output->wl_resources) {
if (client == wl_resource_get_client(resource)) {
wl_surface_send_enter(surface->resource, resource);
}
}
}
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void wlr_surface_send_leave(struct wlr_surface *surface,
struct wlr_output *output) {
struct wl_client *client = wl_resource_get_client(surface->resource);
struct wl_resource *resource;
wl_resource_for_each(resource, &output->wl_resources) {
if (client == wl_resource_get_client(resource)) {
wl_surface_send_leave(surface->resource, resource);
}
}
}
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static inline int64_t timespec_to_msec(const struct timespec *a) {
return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
}
void wlr_surface_send_frame_done(struct wlr_surface *surface,
const struct timespec *when) {
struct wlr_frame_callback *cb, *cnext;
wl_list_for_each_safe(cb, cnext, &surface->current->frame_callback_list,
link) {
wl_callback_send_done(cb->resource, timespec_to_msec(when));
wl_resource_destroy(cb->resource);
}
}
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void wlr_surface_set_role_committed(struct wlr_surface *surface,
void (*role_committed)(struct wlr_surface *surface, void *role_data),
void *role_data) {
surface->role_committed = role_committed;
surface->role_data = role_data;
}
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static void surface_for_each_surface(struct wlr_surface *surface, int x, int y,
wlr_surface_iterator_func_t iterator, void *user_data) {
iterator(surface, x, y, user_data);
struct wlr_subsurface *subsurface;
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wl_list_for_each(subsurface, &surface->subsurfaces, parent_link) {
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struct wlr_surface_state *state = subsurface->surface->current;
int sx = state->subsurface_position.x;
int sy = state->subsurface_position.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);
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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;
}