Support xdg-shell and add basic rendering

include/desktop/desktop.h

@@ -13,10 +13,13 @@
 
 struct kiwmi_desktop {
     struct wlr_compositor *compositor;
+    struct wlr_xdg_shell *xdg_shell;
     struct wlr_data_device_manager *data_device_manager;
     struct wlr_output_layout *output_layout;
     struct wl_list outputs; // struct kiwmi_output::link
+    struct wl_list views;   // struct kiwmi_view::link
 
+    struct wl_listener xdg_shell_new_surface;
     struct wl_listener new_output;
 };
 

include/desktop/view.h

@@ -0,0 +1,55 @@
+/* Copyright (c), Charlotte Meyer <dev@buffet.sh>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef KIWMI_DESKTOP_VIEW_H
+#define KIWMI_DESKTOP_VIEW_H
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include <wayland-server.h>
+#include <wlr/types/wlr_xdg_shell.h>
+
+enum kiwmi_view_type {
+    KIWMI_VIEW_XDG_SHELL,
+};
+
+struct kiwmi_view {
+    struct wl_list link;
+
+    struct kiwmi_desktop *desktop;
+
+    const struct kiwmi_view_impl *impl;
+
+    enum kiwmi_view_type type;
+    union {
+        struct wlr_xdg_surface *xdg_surface;
+    };
+
+    struct wl_listener map;
+    struct wl_listener unmap;
+    struct wl_listener destroy;
+
+    double x;
+    double y;
+
+    bool mapped;
+};
+
+struct kiwmi_view_impl {
+    void (*for_each_surface)(
+        struct kiwmi_view *view,
+        wlr_surface_iterator_func_t iterator,
+        void *user_data);
+};
+
+void kiwmi_view_for_each_surface(
+    struct kiwmi_view *view,
+    wlr_surface_iterator_func_t iterator,
+    void *user_data);
+
+#endif /* KIWMI_DESKTOP_VIEW_H */

include/desktop/xdg_shell.h

@@ -0,0 +1,15 @@
+/* Copyright (c), Charlotte Meyer <dev@buffet.sh>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef KIWMI_DESKTOP_XDG_SHELL_H
+#define KIWMI_DESKTOP_XDG_SHELL_H
+
+#include <wayland-server.h>
+
+void xdg_shell_new_surface_notify(struct wl_listener *listener, void *data);
+
+#endif /* KIWMI_DESKTOP_XDG_SHELL_H */

kiwmi/desktop/desktop.c

@@ -13,10 +13,13 @@
 #include <wlr/backend.h>
 #include <wlr/types/wlr_compositor.h>
 #include <wlr/types/wlr_data_device.h>
+#include <wlr/types/wlr_export_dmabuf_v1.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_xdg_output_v1.h>
+#include <wlr/types/wlr_xdg_shell.h>
 
 #include "desktop/output.h"
+#include "desktop/xdg_shell.h"
 #include "server.h"
 
 bool
@@ -28,9 +31,18 @@ desktop_init(struct kiwmi_desktop *desktop, struct wlr_renderer *renderer)
         wlr_data_device_manager_create(server->wl_display);
     desktop->output_layout = wlr_output_layout_create();
 
-    wlr_xdg_output_manager_v1_create(server->wl_display, desktop->output_layout);
+    wlr_export_dmabuf_manager_v1_create(server->wl_display);
+    wlr_xdg_output_manager_v1_create(
+        server->wl_display, desktop->output_layout);
+
+    desktop->xdg_shell = wlr_xdg_shell_create(server->wl_display);
+    desktop->xdg_shell_new_surface.notify = xdg_shell_new_surface_notify;
+    wl_signal_add(
+        &desktop->xdg_shell->events.new_surface,
+        &desktop->xdg_shell_new_surface);
 
     wl_list_init(&desktop->outputs);
+    wl_list_init(&desktop->views);
 
     desktop->new_output.notify = new_output_notify;
     wl_signal_add(&server->backend->events.new_output, &desktop->new_output);

kiwmi/desktop/output.c

@@ -12,25 +12,78 @@
 #include <wayland-server.h>
 #include <wlr/backend.h>
 #include <wlr/render/wlr_renderer.h>
+#include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_surface.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include <wlr/util/log.h>
 
 #include "desktop/desktop.h"
+#include "desktop/view.h"
 #include "input/cursor.h"
 #include "input/input.h"
 #include "server.h"
 
+struct render_data {
+    struct wlr_output *output;
+    struct kiwmi_view *view;
+    struct wlr_renderer *renderer;
+    struct timespec *when;
+};
+
+static void
+render_surface(struct wlr_surface *surface, int sx, int sy, void *data)
+{
+    struct render_data *rdata = data;
+    struct kiwmi_view *view   = rdata->view;
+    struct wlr_output *output = rdata->output;
+
+    struct wlr_texture *texture = wlr_surface_get_texture(surface);
+    if (!texture) {
+        return;
+    }
+
+    double ox = 0;
+    double oy = 0;
+    wlr_output_layout_output_coords(
+        view->desktop->output_layout, output, &ox, &oy);
+
+    ox += view->x + sx;
+    oy += view->y + sy;
+
+    struct wlr_box box = {
+        .x      = ox * output->scale,
+        .y      = oy * output->scale,
+        .width  = surface->current.width * output->scale,
+        .height = surface->current.height * output->scale,
+    };
+
+    float matrix[9];
+    enum wl_output_transform transform =
+        wlr_output_transform_invert(surface->current.transform);
+    wlr_matrix_project_box(
+        matrix, &box, transform, 0, output->transform_matrix);
+
+    wlr_render_texture_with_matrix(rdata->renderer, texture, matrix, 1);
+
+    wlr_surface_send_frame_done(surface, rdata->when);
+}
+
 static void
 output_frame_notify(struct wl_listener *listener, void *data)
 {
     struct kiwmi_output *output   = wl_container_of(listener, output, frame);
     struct wlr_output *wlr_output = data;
+    struct kiwmi_desktop *desktop = output->desktop;
     struct wlr_renderer *renderer =
         wlr_backend_get_renderer(wlr_output->backend);
 
+    struct timespec now;
+    clock_gettime(CLOCK_MONOTONIC, &now);
+
     if (!wlr_output_attach_render(wlr_output, NULL)) {
+        wlr_log(WLR_ERROR, "Failed to attach renderer to output");
         return;
     }
 
@@ -39,12 +92,28 @@ output_frame_notify(struct wl_listener *listener, void *data)
 
     wlr_output_effective_resolution(wlr_output, &width, &height);
 
-    {
     wlr_renderer_begin(renderer, width, height);
     wlr_renderer_clear(renderer, (float[]){0.0f, 1.0f, 0.0f, 1.0f});
+
+    struct kiwmi_view *view;
+    wl_list_for_each_reverse(view, &desktop->views, link)
+    {
+        if (!view->mapped) {
+            continue;
+        }
+
+        struct render_data rdata = {
+            .output   = output->wlr_output,
+            .view     = view,
+            .renderer = renderer,
+            .when     = &now,
+        };
+
+        kiwmi_view_for_each_surface(view, render_surface, &rdata);
+    }
+
     wlr_output_render_software_cursors(wlr_output, NULL);
     wlr_renderer_end(renderer);
-    }
 
     wlr_output_commit(wlr_output);
 }

kiwmi/desktop/view.c

@@ -0,0 +1,19 @@
+/* Copyright (c), Charlotte Meyer <dev@buffet.sh>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "desktop/view.h"
+
+void
+kiwmi_view_for_each_surface(
+    struct kiwmi_view *view,
+    wlr_surface_iterator_func_t iterator,
+    void *user_data)
+{
+    if (view->impl->for_each_surface) {
+        view->impl->for_each_surface(view, iterator, user_data);
+    }
+}

kiwmi/desktop/xdg_shell.c

@@ -0,0 +1,98 @@
+/* Copyright (c), Charlotte Meyer <dev@buffet.sh>
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "desktop/xdg_shell.h"
+
+#include <wlr/types/wlr_xdg_shell.h>
+#include <wlr/util/log.h>
+
+#include "desktop/desktop.h"
+#include "desktop/view.h"
+#include "server.h"
+
+static void
+xdg_surface_map_notify(struct wl_listener *listener, void *UNUSED(data))
+{
+    struct kiwmi_view *view = wl_container_of(listener, view, map);
+    view->mapped            = true;
+}
+
+static void
+xdg_surface_unmap_notify(struct wl_listener *listener, void *UNUSED(data))
+{
+    struct kiwmi_view *view = wl_container_of(listener, view, map);
+    view->mapped            = false;
+}
+
+static void
+xdg_surface_destroy_notify(struct wl_listener *listener, void *UNUSED(data))
+{
+    struct kiwmi_view *view = wl_container_of(listener, view, destroy);
+
+    wl_list_remove(&view->map.link);
+    wl_list_remove(&view->unmap.link);
+    wl_list_remove(&view->destroy.link);
+
+    free(view);
+}
+
+static void
+xdg_shell_view_for_each_surface(
+    struct kiwmi_view *view,
+    wlr_surface_iterator_func_t iterator,
+    void *user_data)
+{
+    wlr_xdg_surface_for_each_surface(view->xdg_surface, iterator, user_data);
+}
+
+static const struct kiwmi_view_impl xdg_shell_view_impl = {
+    .for_each_surface = xdg_shell_view_for_each_surface,
+};
+
+void
+xdg_shell_new_surface_notify(struct wl_listener *listener, void *data)
+{
+    struct wlr_xdg_surface *xdg_surface = data;
+    struct kiwmi_desktop *desktop =
+        wl_container_of(listener, desktop, xdg_shell_new_surface);
+
+    if (xdg_surface->role == WLR_XDG_SURFACE_ROLE_POPUP) {
+        wlr_log(WLR_DEBUG, "New xdg_shell popup");
+        return;
+    }
+
+    wlr_log(
+        WLR_DEBUG,
+        "New xdg_shell toplevel title='%s' app_id='%s'",
+        xdg_surface->toplevel->title,
+        xdg_surface->toplevel->app_id);
+
+    wlr_xdg_surface_ping(xdg_surface);
+
+    struct kiwmi_view *view = malloc(sizeof(*view));
+    if (!view) {
+        wlr_log(WLR_ERROR, "Failed to allocate view");
+        return;
+    }
+
+    view->desktop     = desktop;
+    view->type        = KIWMI_VIEW_XDG_SHELL;
+    view->impl        = &xdg_shell_view_impl;
+    view->xdg_surface = xdg_surface;
+    view->mapped      = false;
+
+    view->map.notify = xdg_surface_map_notify;
+    wl_signal_add(&xdg_surface->events.map, &view->map);
+
+    view->unmap.notify = xdg_surface_unmap_notify;
+    wl_signal_add(&xdg_surface->events.unmap, &view->unmap);
+
+    view->destroy.notify = xdg_surface_destroy_notify;
+    wl_signal_add(&xdg_surface->events.destroy, &view->destroy);
+
+    wl_list_insert(&desktop->views, &view->link);
+}

kiwmi/meson.build

@@ -4,6 +4,8 @@ kiwmi_sources = files(
   'server.c',
   'desktop/desktop.c',
   'desktop/output.c',
+  'desktop/view.c',
+  'desktop/xdg_shell.c',
   'input/cursor.c',
   'input/input.c',
   'input/keyboard.c',