Check for g_wayland in every API call.
[staging/windowmanager.git] / src / main.cpp
index cd8d67d..f5d33c7 100644 (file)
-#include "util.h"
+#include "util.hpp"
 #include "wayland.hpp"
 
-#include <unistd.h>
+#include <algorithm>
+#include <json.h>
 
-#include <stdlib.h>
-#include <string.h>
+#define AFB_BINDING_VERSION 2
 
-#include <map>
-#include <memory>
-#include <string>
-#include <vector>
+extern "C" {
+#include <afb/afb-binding.h>
+#include <systemd/sd-event.h>
+}
 
-#include <sys/poll.h>
+#include <json.hpp>
 
-struct conn {
-   std::vector<std::unique_ptr<wl::output>> outputs;
-   std::unique_ptr<genivi::controller> c;
-};
+using json = nlohmann::json;
 
 namespace {
-int check_events(struct wl::display *d, struct conn *c, int fd) {
-   struct pollfd pfd[2] = {{.fd = d->get_fd(), .events = POLLIN, .revents = 0},
-                           {.fd = fd, .events = POLLIN, .revents = 0}};
+struct wayland {
+   std::unique_ptr<wl::display> display;
+   std::unique_ptr<genivi::controller> controller;
+   std::vector<std::unique_ptr<wl::output>> outputs;
+   sd_event_source *event_source;
 
-   d->flush();
+   wayland()
+      : display(new wl::display),
+        controller(nullptr),
+        outputs(),
+        event_source{} {}
+};
 
-   if (poll(pfd, fd != -1 ? 2 : 1, -1) != -1 && errno != EINTR) {
-      int ret = 0;
+struct wayland *g_wayland;
 
-      if (pfd[0].revents & POLLIN) {
-         ret = d->dispatch();
-      }
+//  _       _ _       _                         _    ____
+// (_)_ __ (_) |_    | | __ _ _   _  ___  _   _| |_ / /\ \
+// | | '_ \| | __|   | |/ _` | | | |/ _ \| | | | __| |  | |
+// | | | | | | |_    | | (_| | |_| | (_) | |_| | |_| |  | |
+// |_|_| |_|_|\__|___|_|\__,_|\__, |\___/ \__,_|\__| |  | |
+//              |_____|       |___/                 \_\/_/
+char const *init_layout() {
+   if (!g_wayland->controller) {
+      return "ivi_controller global not available";
+   }
 
-      if (ret == -1)
-         return ret;
-
-      if (fd != -1 && (pfd[1].revents & POLLIN)) {
-         char buf[256];
-
-         // read all there is ...
-         while (read(pfd[1].fd, buf, sizeof(buf)) == sizeof(buf))
-            ;
-
-         // Display current status
-         if (!c->c->surfaces.empty()) {
-            puts("Surfaces:");
-            for (auto const &i : c->c->surfaces) {
-               struct genivi::rect const &r = i.second->dst_rect;
-               struct genivi::size const &s = i.second->size;
-               printf("%d [%ux%u] (%ux%u@%dx%d), ", i.first, s.w, s.h, r.w, r.h,
-                      r.x, r.y);
-            }
-            puts("\b\b ");
-         }
-      }
+   if (g_wayland->outputs.empty()) {
+      return "no output was set up!";
    }
 
-   return 0;
-}
+   auto &c = g_wayland->controller;
+
+   auto &o = g_wayland->outputs.front();
+   auto &s = c->screens.begin()->second;
+   auto &layers = c->layers;
+
+   // XXX: Write output dimensions to ivi controller...
+   c->output_size = genivi::size{uint32_t(o->width), uint32_t(o->height)};
+
+   // Clear scene
+   layers.clear();
+
+   // Clear screen
+   s->clear();
+
+   // Setup our dummy scene...
+   c->layer_create(100, 0, 0);   // bottom layer, anything else
+   c->layer_create(1000, 0, 0);  // top layer, mandelbrot
+
+   auto &l100 = c->layers[100];
+   auto &l1k = c->layers[1000];
+
+   // Set layers fullscreen
+   l100->set_destination_rectangle(0, 0, o->width, o->height);
+   l1k->set_destination_rectangle(0, 0, o->width, o->height);
+   l100->set_visibility(1);
+   l1k->set_visibility(1);
+
+   // Add layers to screen
+   s->set_render_order({100, 1000});
+
+   c->commit_changes();
+
+   g_wayland->display->flush();
+
+   return nullptr;
 }
 
-int main(int argc, char **argv) {
+//  _     _           _ _                 _       _ _    ____
+// | |__ (_)_ __   __| (_)_ __   __ _    (_)_ __ (_) |_ / /\ \
+// | '_ \| | '_ \ / _` | | '_ \ / _` |   | | '_ \| | __| |  | |
+// | |_) | | | | | (_| | | | | | (_| |   | | | | | | |_| |  | |
+// |_.__/|_|_| |_|\__,_|_|_| |_|\__, |___|_|_| |_|_|\__| |  | |
+//                              |___/_____|             \_\/_/
+int binding_init_() {
    lognotice("WinMan ver. %s", WINMAN_VERSION_STRING);
 
-   if (!getenv("XDG_RUNTIME_DIR"))
-      fatal("Environment variable XDG_RUNTIME_DIR not set");
+   if (g_wayland != nullptr) {
+      AFB_ERROR("Wayland context already initialized?");
+      return -1;
+   }
+
+   if (getenv("XDG_RUNTIME_DIR") == nullptr) {
+      AFB_ERROR("Environment variable XDG_RUNTIME_DIR not set");
+      return -1;
+   }
 
-   auto d = std::make_unique<wl::display>();
-   if (!d->ok())
-      fatal("Could not connect to compositor");
+   g_wayland = new wayland;
+   if (!g_wayland->display->ok()) {
+      AFB_ERROR("Could not connect to compositor");
+      return -1;
+   }
 
-   struct conn c = {};
+   auto &d = g_wayland->display;
+   d->r.add_global_handler("wl_output", [](wl_registry *r, uint32_t name,
+                                           uint32_t v) {
+      g_wayland->outputs.emplace_back(std::make_unique<wl::output>(r, name, v));
+   });
 
-   d->r->add_global_handler(
-      "ivi_controller", [&](wl_registry *r, uint32_t name, uint32_t v) {
-         c.c = std::make_unique<genivi::controller>(r, name, v);
-      });
+   d->r.add_global_handler("ivi_controller", [](wl_registry *r, uint32_t name,
+                                                uint32_t v) {
+      g_wayland->controller = std::make_unique<genivi::controller>(r, name, v);
 
-   d->r->add_global_handler(
-      "wl_output", [&](wl_registry *r, uint32_t name, uint32_t v) {
-         c.outputs.emplace_back(std::make_unique<wl::output>(r, name, v));
-      });
+      // XXX: This protocol needs the output, so lets just add our mapping
+      // here...
+      g_wayland->controller->add_proxy_to_id_mapping(
+         g_wayland->outputs.back()->proxy.get(),
+         wl_proxy_get_id(reinterpret_cast<struct wl_proxy *>(
+            g_wayland->outputs.back()->proxy.get())));
+   });
 
    // First level objects
    d->roundtrip();
@@ -89,14 +134,140 @@ int main(int argc, char **argv) {
    // Third level objects
    d->roundtrip();
 
-   if (!c.c)
-      fatal("ivi_controller global not available");
-
-   while (check_events(d.get(), &c, STDIN_FILENO) != -1) {
-      c.c->execute_pending();
+   if (char const *e = init_layout()) {
+      AFB_ERROR("Could not init layout: %s", e);
+      return -1;
    }
 
-   d->roundtrip();
+   sd_event *ev = afb_daemon_get_event_loop();
+   sd_event_add_io(
+      ev, &g_wayland->event_source, g_wayland->display->get_fd(),
+      EPOLLIN | EPOLLHUP,
+      [](sd_event_source *evs, int fd, uint32_t events, void *data) {
+         if ((events & EPOLLHUP) != 0) {
+            sd_event_source_unref(evs);
+            delete g_wayland;
+            g_wayland = nullptr;
+            return 1;
+         }
+
+         if (events & EPOLLIN) {
+            int ret = g_wayland->display->dispatch();
+            g_wayland->display->flush();
+
+            // execute pending tasks, that is layout changes etc.
+            g_wayland->controller->execute_pending();
+            g_wayland->display->roundtrip();
+            return ret == -1 ? -1 : 0;
+         }
+
+         return 0;
+      },
+      g_wayland);
+
+   atexit([] { delete g_wayland; });
 
    return 0;
 }
+
+int binding_init() noexcept {
+   try {
+      return binding_init_();
+   } catch (std::exception &e) {
+      AFB_ERROR("Uncaught exception in binding_init(): %s", e.what());
+   }
+   return -1;
+}
+
+#define CHECK_WAYLAND()                                                    \
+   do {                                                                    \
+      if (g_wayland == nullptr) {                                          \
+         afb_req_fail(req, "failed",                                       \
+                      "Binding not initialized, did the compositor die?"); \
+         return;                                                           \
+      }                                                                    \
+   } while (0)
+
+//      _      _                         _        _              ____
+//   __| | ___| |__  _   _  __ _     ___| |_ __ _| |_ _   _ ___ / /\ \
+//  / _` |/ _ \ '_ \| | | |/ _` |   / __| __/ _` | __| | | / __| |  | |
+// | (_| |  __/ |_) | |_| | (_| |   \__ \ || (_| | |_| |_| \__ \ |  | |
+//  \__,_|\___|_.__/ \__,_|\__, |___|___/\__\__,_|\__|\__,_|___/ |  | |
+//                         |___/_____|                          \_\/_/
+void debug_status(struct afb_req req) noexcept {
+   // Quick and dirty, dump current surfaces and layers
+   AFB_REQ_DEBUG(req, "status");
+
+   CHECK_WAYLAND();
+
+   try {
+      json j;
+
+      if (!g_wayland->controller->surfaces.empty()) {
+         auto js = json::array();
+         for (auto const &i : g_wayland->controller->surfaces) {
+            auto const &r = i.second->dst_rect;
+            auto const &s = i.second->size;
+            js.push_back({{"id", i.first},
+                          {"size", {s.w, s.h}},
+                          {"dst_rect", {r.w, r.h, r.x, r.y}}});
+         }
+         j["surfaces"] = js;
+      }
+
+      if (!g_wayland->controller->layers.empty()) {
+         auto js = json::array();
+         for (auto const &i : g_wayland->controller->layers) {
+            auto const &r = i.second->dst_rect;
+            auto const &s = i.second->size;
+            js.push_back({{"id", i.first},
+                          {"size", {s.w, s.h}},
+                          {"dst_rect", {r.w, r.h, r.x, r.y}}});
+         }
+         j["layers"] = js;
+      }
+
+      afb_req_success(req, json_tokener_parse(j.dump().c_str()), "status");
+   } catch (std::exception &e) {
+      afb_req_fail_f(req, "failed", "Uncaught exception: %s", e.what());
+   }
+}
+
+void debug_surfaces(afb_req req) {
+   CHECK_WAYLAND();
+
+   auto a = json_object_new_array();
+
+   if (!g_wayland->controller->surfaces.empty()) {
+      for (auto const &i : g_wayland->controller->surfaces) {
+         json_object_array_add(a, json_object_new_int(i.first));
+      }
+   }
+
+   afb_req_success(req, a, "surfaces");
+}
+
+void debug_layers(afb_req req) {
+   CHECK_WAYLAND();
+
+   auto a = json_object_new_array();
+
+   if (!g_wayland->controller->layers.empty()) {
+      for (auto const &i : g_wayland->controller->layers) {
+         json_object_array_add(a, json_object_new_int(i.first));
+      }
+   }
+
+   afb_req_success(req, a, "surfaces");
+}
+
+const struct afb_verb_v2 verbs[] = {
+   {"status", debug_status, NULL, NULL, AFB_SESSION_NONE_V2},
+   {"layers", debug_layers, NULL, NULL, AFB_SESSION_NONE_V2},
+   {"surfaces", debug_surfaces, NULL, NULL, AFB_SESSION_NONE_V2},
+   {},
+};
+}  // namespace
+
+extern "C" const struct afb_binding_v2 afbBindingV2 = {
+   "winman", NULL, NULL, verbs, NULL, binding_init, NULL, 1};