Tony Barbour | 2f18b29 | 2016-02-25 15:44:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 Google, Inc. |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included |
| 12 | * in all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 19 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 20 | * DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <cassert> |
| 24 | #include <sstream> |
| 25 | #include <dlfcn.h> |
| 26 | #include <time.h> |
| 27 | |
| 28 | #include "Helpers.h" |
| 29 | #include "Game.h" |
| 30 | #include "ShellXcb.h" |
| 31 | |
| 32 | namespace { |
| 33 | |
| 34 | class PosixTimer { |
| 35 | public: |
| 36 | PosixTimer() |
| 37 | { |
| 38 | reset(); |
| 39 | } |
| 40 | |
| 41 | void reset() |
| 42 | { |
| 43 | clock_gettime(CLOCK_MONOTONIC, &start_); |
| 44 | } |
| 45 | |
| 46 | double get() const |
| 47 | { |
| 48 | struct timespec now; |
| 49 | clock_gettime(CLOCK_MONOTONIC, &now); |
| 50 | |
| 51 | constexpr long one_s_in_ns = 1000 * 1000 * 1000; |
| 52 | constexpr double one_s_in_ns_d = static_cast<double>(one_s_in_ns); |
| 53 | |
| 54 | time_t s = now.tv_sec - start_.tv_sec; |
| 55 | long ns; |
| 56 | if (now.tv_nsec > start_.tv_nsec) { |
| 57 | ns = now.tv_nsec - start_.tv_nsec; |
| 58 | } else { |
| 59 | assert(s > 0); |
| 60 | s--; |
| 61 | ns = one_s_in_ns - (start_.tv_nsec - now.tv_nsec); |
| 62 | } |
| 63 | |
| 64 | return static_cast<double>(s) + static_cast<double>(ns) / one_s_in_ns_d; |
| 65 | } |
| 66 | |
| 67 | private: |
| 68 | struct timespec start_; |
| 69 | }; |
| 70 | |
| 71 | xcb_intern_atom_cookie_t intern_atom_cookie(xcb_connection_t *c, const std::string &s) |
| 72 | { |
| 73 | return xcb_intern_atom(c, false, s.size(), s.c_str()); |
| 74 | } |
| 75 | |
| 76 | xcb_atom_t intern_atom(xcb_connection_t *c, xcb_intern_atom_cookie_t cookie) |
| 77 | { |
| 78 | xcb_atom_t atom = XCB_ATOM_NONE; |
| 79 | xcb_intern_atom_reply_t *reply = xcb_intern_atom_reply(c, cookie, nullptr); |
| 80 | if (reply) { |
| 81 | atom = reply->atom; |
| 82 | free(reply); |
| 83 | } |
| 84 | |
| 85 | return atom; |
| 86 | } |
| 87 | |
| 88 | } // namespace |
| 89 | |
| 90 | ShellXcb::ShellXcb(Game &game) : Shell(game) |
| 91 | { |
| 92 | instance_extensions_.push_back(VK_KHR_XCB_SURFACE_EXTENSION_NAME); |
| 93 | |
| 94 | init_connection(); |
| 95 | init_vk(); |
| 96 | } |
| 97 | |
| 98 | ShellXcb::~ShellXcb() |
| 99 | { |
| 100 | cleanup_vk(); |
| 101 | dlclose(lib_handle_); |
| 102 | |
| 103 | xcb_disconnect(c_); |
| 104 | } |
| 105 | |
| 106 | void ShellXcb::init_connection() |
| 107 | { |
| 108 | int scr; |
| 109 | |
| 110 | c_ = xcb_connect(nullptr, &scr); |
| 111 | if (!c_ || xcb_connection_has_error(c_)) { |
| 112 | xcb_disconnect(c_); |
| 113 | throw std::runtime_error("failed to connect to the display server"); |
| 114 | } |
| 115 | |
| 116 | const xcb_setup_t *setup = xcb_get_setup(c_); |
| 117 | xcb_screen_iterator_t iter = xcb_setup_roots_iterator(setup); |
| 118 | while (scr-- > 0) |
| 119 | xcb_screen_next(&iter); |
| 120 | |
| 121 | scr_ = iter.data; |
| 122 | } |
| 123 | |
| 124 | void ShellXcb::create_window() |
| 125 | { |
| 126 | win_ = xcb_generate_id(c_); |
| 127 | |
| 128 | uint32_t value_mask, value_list[32]; |
| 129 | value_mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK; |
| 130 | value_list[0] = scr_->black_pixel; |
| 131 | value_list[1] = XCB_EVENT_MASK_KEY_PRESS | |
| 132 | XCB_EVENT_MASK_STRUCTURE_NOTIFY; |
| 133 | |
| 134 | xcb_create_window(c_, |
| 135 | XCB_COPY_FROM_PARENT, |
| 136 | win_, scr_->root, 0, 0, |
| 137 | settings_.initial_width, settings_.initial_height, 0, |
| 138 | XCB_WINDOW_CLASS_INPUT_OUTPUT, |
| 139 | scr_->root_visual, |
| 140 | value_mask, value_list); |
| 141 | |
| 142 | xcb_intern_atom_cookie_t utf8_string_cookie = intern_atom_cookie(c_, "UTF8_STRING"); |
| 143 | xcb_intern_atom_cookie_t _net_wm_name_cookie = intern_atom_cookie(c_, "_NET_WM_NAME"); |
| 144 | xcb_intern_atom_cookie_t wm_protocols_cookie = intern_atom_cookie(c_, "WM_PROTOCOLS"); |
| 145 | xcb_intern_atom_cookie_t wm_delete_window_cookie = intern_atom_cookie(c_, "WM_DELETE_WINDOW"); |
| 146 | |
| 147 | // set title |
| 148 | xcb_atom_t utf8_string = intern_atom(c_, utf8_string_cookie); |
| 149 | xcb_atom_t _net_wm_name = intern_atom(c_, _net_wm_name_cookie); |
| 150 | xcb_change_property(c_, XCB_PROP_MODE_REPLACE, win_, _net_wm_name, |
| 151 | utf8_string, 8, settings_.name.size(), settings_.name.c_str()); |
| 152 | |
| 153 | // advertise WM_DELETE_WINDOW |
| 154 | wm_protocols_ = intern_atom(c_, wm_protocols_cookie); |
| 155 | wm_delete_window_ = intern_atom(c_, wm_delete_window_cookie); |
| 156 | xcb_change_property(c_, XCB_PROP_MODE_REPLACE, win_, wm_protocols_, |
| 157 | XCB_ATOM_ATOM, 32, 1, &wm_delete_window_); |
| 158 | } |
| 159 | |
| 160 | PFN_vkGetInstanceProcAddr ShellXcb::load_vk() |
| 161 | { |
| 162 | const char filename[] = "libvulkan.so"; |
| 163 | void *handle, *symbol; |
| 164 | |
| 165 | #ifdef UNINSTALLED_LOADER |
| 166 | handle = dlopen(UNINSTALLED_LOADER, RTLD_LAZY); |
| 167 | if (!handle) |
| 168 | handle = dlopen(filename, RTLD_LAZY); |
| 169 | #else |
| 170 | handle = dlopen(filename, RTLD_LAZY); |
| 171 | #endif |
| 172 | |
| 173 | if (handle) |
| 174 | symbol = dlsym(handle, "vkGetInstanceProcAddr"); |
| 175 | |
| 176 | if (!handle || !symbol) { |
| 177 | std::stringstream ss; |
| 178 | ss << "failed to load " << dlerror(); |
| 179 | |
| 180 | if (handle) |
| 181 | dlclose(handle); |
| 182 | |
| 183 | throw std::runtime_error(ss.str()); |
| 184 | } |
| 185 | |
| 186 | lib_handle_ = handle; |
| 187 | |
| 188 | return reinterpret_cast<PFN_vkGetInstanceProcAddr>(symbol); |
| 189 | } |
| 190 | |
| 191 | bool ShellXcb::can_present(VkPhysicalDevice phy, uint32_t queue_family) |
| 192 | { |
| 193 | return vk::GetPhysicalDeviceXcbPresentationSupportKHR(phy, |
| 194 | queue_family, c_, scr_->root_visual); |
| 195 | } |
| 196 | |
| 197 | VkSurfaceKHR ShellXcb::create_surface(VkInstance instance) |
| 198 | { |
| 199 | VkXcbSurfaceCreateInfoKHR surface_info = {}; |
| 200 | surface_info.sType = VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR; |
| 201 | surface_info.connection = c_; |
| 202 | surface_info.window = win_; |
| 203 | |
| 204 | VkSurfaceKHR surface; |
| 205 | vk::assert_success(vk::CreateXcbSurfaceKHR(instance, &surface_info, nullptr, &surface)); |
| 206 | |
| 207 | return surface; |
| 208 | } |
| 209 | |
| 210 | void ShellXcb::handle_event(const xcb_generic_event_t *ev) |
| 211 | { |
| 212 | switch (ev->response_type & 0x7f) { |
| 213 | case XCB_CONFIGURE_NOTIFY: |
| 214 | { |
| 215 | const xcb_configure_notify_event_t *notify = |
| 216 | reinterpret_cast<const xcb_configure_notify_event_t *>(ev); |
| 217 | resize_swapchain(notify->width, notify->height); |
| 218 | } |
| 219 | break; |
| 220 | case XCB_KEY_PRESS: |
| 221 | { |
| 222 | const xcb_key_press_event_t *press = |
| 223 | reinterpret_cast<const xcb_key_press_event_t *>(ev); |
| 224 | Game::Key key; |
| 225 | |
| 226 | // TODO translate xcb_keycode_t |
| 227 | switch (press->detail) { |
| 228 | case 9: |
| 229 | key = Game::KEY_ESC; |
| 230 | break; |
| 231 | case 111: |
| 232 | key = Game::KEY_UP; |
| 233 | break; |
| 234 | case 116: |
| 235 | key = Game::KEY_DOWN; |
| 236 | break; |
| 237 | case 65: |
| 238 | key = Game::KEY_SPACE; |
| 239 | break; |
| 240 | default: |
| 241 | key = Game::KEY_UNKNOWN; |
| 242 | break; |
| 243 | } |
| 244 | |
| 245 | game_.on_key(key); |
| 246 | } |
| 247 | break; |
| 248 | case XCB_CLIENT_MESSAGE: |
| 249 | { |
| 250 | const xcb_client_message_event_t *msg = |
| 251 | reinterpret_cast<const xcb_client_message_event_t *>(ev); |
| 252 | if (msg->type == wm_protocols_ && msg->data.data32[0] == wm_delete_window_) |
| 253 | game_.on_key(Game::KEY_SHUTDOWN); |
| 254 | } |
| 255 | break; |
| 256 | default: |
| 257 | break; |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | void ShellXcb::loop_wait() |
| 262 | { |
| 263 | while (true) { |
| 264 | xcb_generic_event_t *ev = xcb_wait_for_event(c_); |
| 265 | if (!ev) |
| 266 | continue; |
| 267 | |
| 268 | handle_event(ev); |
| 269 | free(ev); |
| 270 | |
| 271 | if (quit_) |
| 272 | break; |
| 273 | |
| 274 | acquire_back_buffer(); |
| 275 | present_back_buffer(); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | void ShellXcb::loop_poll() |
| 280 | { |
| 281 | PosixTimer timer; |
| 282 | |
| 283 | double current_time = timer.get(); |
| 284 | double profile_start_time = current_time; |
| 285 | int profile_present_count = 0; |
| 286 | |
| 287 | while (true) { |
| 288 | // handle pending events |
| 289 | while (true) { |
| 290 | xcb_generic_event_t *ev = xcb_poll_for_event(c_); |
| 291 | if (!ev) |
| 292 | break; |
| 293 | |
| 294 | handle_event(ev); |
| 295 | free(ev); |
| 296 | } |
| 297 | |
| 298 | if (quit_) |
| 299 | break; |
| 300 | |
| 301 | acquire_back_buffer(); |
| 302 | |
| 303 | double t = timer.get(); |
| 304 | add_game_time(static_cast<float>(t - current_time)); |
| 305 | |
| 306 | present_back_buffer(); |
| 307 | |
| 308 | current_time = t; |
| 309 | |
| 310 | profile_present_count++; |
| 311 | if (current_time - profile_start_time >= 5.0) { |
| 312 | const double fps = profile_present_count / (current_time - profile_start_time); |
| 313 | std::stringstream ss; |
| 314 | ss << profile_present_count << " presents in " << |
| 315 | current_time - profile_start_time << " seconds " << |
| 316 | "(FPS: " << fps << ")"; |
| 317 | log(LOG_INFO, ss.str().c_str()); |
| 318 | |
| 319 | profile_start_time = current_time; |
| 320 | profile_present_count = 0; |
| 321 | } |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | void ShellXcb::run() |
| 326 | { |
| 327 | create_window(); |
| 328 | xcb_map_window(c_, win_); |
| 329 | xcb_flush(c_); |
| 330 | |
| 331 | create_context(); |
| 332 | resize_swapchain(settings_.initial_width, settings_.initial_height); |
| 333 | |
| 334 | quit_ = false; |
| 335 | if (settings_.animate) |
| 336 | loop_poll(); |
| 337 | else |
| 338 | loop_wait(); |
| 339 | |
| 340 | destroy_context(); |
| 341 | |
| 342 | xcb_destroy_window(c_, win_); |
| 343 | xcb_flush(c_); |
| 344 | } |