viewporter: new protocol implementation

Closes: https://github.com/swaywm/wlroots/issues/633
This commit is contained in:
Simon Ser 2020-03-31 15:19:08 +02:00 committed by Drew DeVault
parent c618a76540
commit 9e68ed2159
4 changed files with 260 additions and 0 deletions

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@ -0,0 +1,34 @@
/*
* This an unstable interface of wlroots. No guarantees are made regarding the
* future consistency of this API.
*/
#ifndef WLR_USE_UNSTABLE
#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features"
#endif
#ifndef WLR_TYPES_WLR_VIEWPORTER_H
#define WLR_TYPES_WLR_VIEWPORTER_H
#include <wayland-server-core.h>
struct wlr_viewporter {
struct wl_global *global;
struct {
struct wl_signal destroy;
} events;
struct wl_listener display_destroy;
};
struct wlr_viewport {
struct wl_resource *resource;
struct wlr_surface *surface;
struct wl_listener surface_destroy;
struct wl_listener surface_commit;
};
struct wlr_viewporter *wlr_viewporter_create(struct wl_display *display);
#endif

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@ -14,6 +14,7 @@ protocols = {
# Stable upstream protocols
'xdg-shell': wl_protocol_dir / 'stable/xdg-shell/xdg-shell.xml',
'presentation-time': wl_protocol_dir / 'stable/presentation-time/presentation-time.xml',
'viewporter': wl_protocol_dir / 'stable/viewporter/viewporter.xml',
# Unstable upstream protocols
'fullscreen-shell-unstable-v1': wl_protocol_dir / 'unstable/fullscreen-shell/fullscreen-shell-unstable-v1.xml',
'idle-inhibit-unstable-v1': wl_protocol_dir / 'unstable/idle-inhibit/idle-inhibit-unstable-v1.xml',

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@ -64,6 +64,7 @@ wlr_files += files(
'wlr_tablet_tool.c',
'wlr_text_input_v3.c',
'wlr_touch.c',
'wlr_viewporter.c',
'wlr_virtual_keyboard_v1.c',
'wlr_virtual_pointer_v1.c',
'wlr_xcursor_manager.c',

224
types/wlr_viewporter.c Normal file
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@ -0,0 +1,224 @@
#include <assert.h>
#include <stdlib.h>
#include <wlr/types/wlr_surface.h>
#include <wlr/types/wlr_viewporter.h>
#include <wlr/util/log.h>
#include "util/signal.h"
#include "viewporter-protocol.h"
#define VIEWPORTER_VERSION 1
static const struct wp_viewport_interface viewport_impl;
// Returns NULL if the viewport is inert
static struct wlr_viewport *viewport_from_resource(
struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &wp_viewport_interface,
&viewport_impl));
return wl_resource_get_user_data(resource);
}
static void viewport_handle_destroy(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void viewport_handle_set_source(struct wl_client *client,
struct wl_resource *resource, wl_fixed_t x_fixed, wl_fixed_t y_fixed,
wl_fixed_t width_fixed, wl_fixed_t height_fixed) {
struct wlr_viewport *viewport = viewport_from_resource(resource);
if (viewport == NULL) {
wl_resource_post_error(resource, WP_VIEWPORT_ERROR_NO_SURFACE,
"wp_viewport.set_source sent after wl_surface has been destroyed");
return;
}
struct wlr_surface_state *pending = &viewport->surface->pending;
double x = wl_fixed_to_double(x_fixed);
double y = wl_fixed_to_double(y_fixed);
double width = wl_fixed_to_double(width_fixed);
double height = wl_fixed_to_double(height_fixed);
if (x == -1.0 && y == -1.0 && width == -1.0 && height == -1.0) {
pending->viewport.has_src = false;
} else if (x < 0 || y < 0 || width <= 0 || height <= 0) {
wl_resource_post_error(resource, WP_VIEWPORT_ERROR_BAD_VALUE,
"wl_viewport.set_source sent with invalid values");
return;
} else {
pending->viewport.has_src = true;
}
pending->viewport.src.x = x;
pending->viewport.src.y = y;
pending->viewport.src.width = width;
pending->viewport.src.height = height;
pending->committed |= WLR_SURFACE_STATE_VIEWPORT;
}
static void viewport_handle_set_destination(struct wl_client *client,
struct wl_resource *resource, int32_t width, int32_t height) {
struct wlr_viewport *viewport = viewport_from_resource(resource);
if (viewport == NULL) {
wl_resource_post_error(resource, WP_VIEWPORT_ERROR_NO_SURFACE,
"wp_viewport.set_destination sent after wl_surface has been destroyed");
return;
}
struct wlr_surface_state *pending = &viewport->surface->pending;
if (width == -1 && height == -1) {
pending->viewport.has_dst = false;
} else if (width <= 0 || height <= 0) {
wl_resource_post_error(resource, WP_VIEWPORT_ERROR_BAD_VALUE,
"wl_viewport.set_destination sent with invalid values");
return;
} else {
pending->viewport.has_dst = true;
}
pending->viewport.dst_width = width;
pending->viewport.dst_height = height;
pending->committed |= WLR_SURFACE_STATE_VIEWPORT;
}
static const struct wp_viewport_interface viewport_impl = {
.destroy = viewport_handle_destroy,
.set_source = viewport_handle_set_source,
.set_destination = viewport_handle_set_destination,
};
static void viewport_destroy(struct wlr_viewport *viewport) {
if (viewport == NULL) {
return;
}
wl_resource_set_user_data(viewport->resource, NULL);
wl_list_remove(&viewport->surface_destroy.link);
wl_list_remove(&viewport->surface_commit.link);
free(viewport);
}
static void viewport_handle_resource_destroy(struct wl_resource *resource) {
struct wlr_viewport *viewport = viewport_from_resource(resource);
viewport_destroy(viewport);
}
static void viewport_handle_surface_destroy(struct wl_listener *listener,
void *data) {
struct wlr_viewport *viewport =
wl_container_of(listener, viewport, surface_destroy);
viewport_destroy(viewport);
}
static void viewport_handle_surface_commit(struct wl_listener *listener,
void *data) {
struct wlr_viewport *viewport =
wl_container_of(listener, viewport, surface_commit);
struct wlr_surface_state *current = &viewport->surface->pending;
if (!current->viewport.has_dst &&
(floor(current->viewport.src.width) != current->viewport.src.width ||
floor(current->viewport.src.height) != current->viewport.src.height)) {
wl_resource_post_error(viewport->resource, WP_VIEWPORT_ERROR_BAD_SIZE,
"wl_viewport.set_source width and height must be integers "
"when the destination rectangle is unset");
return;
}
if (current->viewport.has_src && current->buffer_resource != NULL &&
(current->viewport.src.x + current->viewport.src.width >
current->buffer_width ||
current->viewport.src.y + current->viewport.src.height >
current->buffer_height)) {
wl_resource_post_error(viewport->resource, WP_VIEWPORT_ERROR_OUT_OF_BUFFER,
"source rectangle out of buffer bounds");
return;
}
}
static void viewporter_handle_destroy(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void viewporter_handle_get_viewport(struct wl_client *client,
struct wl_resource *resource, uint32_t id,
struct wl_resource *surface_resource) {
struct wlr_surface *surface = wlr_surface_from_resource(surface_resource);
struct wlr_viewport *viewport = calloc(1, sizeof(*viewport));
if (viewport == NULL) {
wl_client_post_no_memory(client);
return;
}
uint32_t version = wl_resource_get_version(resource);
viewport->resource = wl_resource_create(client, &wp_viewport_interface,
version, id);
if (viewport->resource == NULL) {
wl_client_post_no_memory(client);
free(viewport);
return;
}
wl_resource_set_implementation(viewport->resource, &viewport_impl,
viewport, viewport_handle_resource_destroy);
viewport->surface = surface;
viewport->surface_destroy.notify = viewport_handle_surface_destroy;
wl_signal_add(&surface->events.destroy, &viewport->surface_destroy);
viewport->surface_commit.notify = viewport_handle_surface_commit;
wl_signal_add(&surface->events.commit, &viewport->surface_commit);
}
static const struct wp_viewporter_interface viewporter_impl = {
.destroy = viewporter_handle_destroy,
.get_viewport = viewporter_handle_get_viewport,
};
static void viewporter_bind(struct wl_client *client, void *data,
uint32_t version, uint32_t id) {
struct wlr_viewporter *viewporter = data;
struct wl_resource *resource = wl_resource_create(client,
&wp_viewporter_interface, version, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(resource, &viewporter_impl, viewporter, NULL);
}
static void handle_display_destroy(struct wl_listener *listener, void *data) {
struct wlr_viewporter *viewporter =
wl_container_of(listener, viewporter, display_destroy);
wlr_signal_emit_safe(&viewporter->events.destroy, NULL);
wl_global_destroy(viewporter->global);
free(viewporter);
}
struct wlr_viewporter *wlr_viewporter_create(struct wl_display *display) {
struct wlr_viewporter *viewporter = calloc(1, sizeof(*viewporter));
if (viewporter == NULL) {
return NULL;
}
viewporter->global = wl_global_create(display, &wp_viewporter_interface,
VIEWPORTER_VERSION, viewporter, viewporter_bind);
if (viewporter->global == NULL) {
free(viewporter);
return NULL;
}
wl_signal_init(&viewporter->events.destroy);
viewporter->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(display, &viewporter->display_destroy);
return viewporter;
}