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osb/source/application/StarMainApplication_sdl.cpp

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#include "StarMainApplication.hpp"
#include "StarLogging.hpp"
#include "StarSignalHandler.hpp"
#include "StarTickRateMonitor.hpp"
#include "StarRenderer_opengl20.hpp"
#include "StarTtlCache.hpp"
#include "StarImage.hpp"
#include "StarImageProcessing.hpp"
#include "SDL2/SDL.h"
#include "StarPlatformServices_pc.hpp"
#ifdef STAR_SYSTEM_WINDOWS
#include "SDL2/SDL_syswm.h"
#include <dwmapi.h>
#endif
namespace Star {
Maybe<Key> keyFromSdlKeyCode(SDL_Keycode sym) {
static HashMap<int, Key> KeyCodeMap{
{SDLK_BACKSPACE, Key::Backspace},
{SDLK_TAB, Key::Tab},
{SDLK_CLEAR, Key::Clear},
{SDLK_RETURN, Key::Return},
{SDLK_PAUSE, Key::Pause},
{SDLK_ESCAPE, Key::Escape},
{SDLK_SPACE, Key::Space},
{SDLK_EXCLAIM, Key::Exclaim},
{SDLK_QUOTEDBL, Key::QuotedBL},
{SDLK_HASH, Key::Hash},
{SDLK_DOLLAR, Key::Dollar},
{SDLK_AMPERSAND, Key::Ampersand},
{SDLK_QUOTE, Key::Quote},
{SDLK_LEFTPAREN, Key::LeftParen},
{SDLK_RIGHTPAREN, Key::RightParen},
{SDLK_ASTERISK, Key::Asterisk},
{SDLK_PLUS, Key::Plus},
{SDLK_COMMA, Key::Comma},
{SDLK_MINUS, Key::Minus},
{SDLK_PERIOD, Key::Period},
{SDLK_SLASH, Key::Slash},
{SDLK_0, Key::Zero},
{SDLK_1, Key::One},
{SDLK_2, Key::Two},
{SDLK_3, Key::Three},
{SDLK_4, Key::Four},
{SDLK_5, Key::Five},
{SDLK_6, Key::Six},
{SDLK_7, Key::Seven},
{SDLK_8, Key::Eight},
{SDLK_9, Key::Nine},
{SDLK_COLON, Key::Colon},
{SDLK_SEMICOLON, Key::Semicolon},
{SDLK_LESS, Key::Less},
{SDLK_EQUALS, Key::Equals},
{SDLK_GREATER, Key::Greater},
{SDLK_QUESTION, Key::Question},
{SDLK_AT, Key::At},
{SDLK_LEFTBRACKET, Key::LeftBracket},
{SDLK_BACKSLASH, Key::Backslash},
{SDLK_RIGHTBRACKET, Key::RightBracket},
{SDLK_CARET, Key::Caret},
{SDLK_UNDERSCORE, Key::Underscore},
{SDLK_BACKQUOTE, Key::Backquote},
{SDLK_a, Key::A},
{SDLK_b, Key::B},
{SDLK_c, Key::C},
{SDLK_d, Key::D},
{SDLK_e, Key::E},
{SDLK_f, Key::F},
{SDLK_g, Key::G},
{SDLK_h, Key::H},
{SDLK_i, Key::I},
{SDLK_j, Key::J},
{SDLK_k, Key::K},
{SDLK_l, Key::L},
{SDLK_m, Key::M},
{SDLK_n, Key::N},
{SDLK_o, Key::O},
{SDLK_p, Key::P},
{SDLK_q, Key::Q},
{SDLK_r, Key::R},
{SDLK_s, Key::S},
{SDLK_t, Key::T},
{SDLK_u, Key::U},
{SDLK_v, Key::V},
{SDLK_w, Key::W},
{SDLK_x, Key::X},
{SDLK_y, Key::Y},
{SDLK_z, Key::Z},
{SDLK_DELETE, Key::Delete},
{SDLK_KP_0, Key::Kp0},
{SDLK_KP_1, Key::Kp1},
{SDLK_KP_2, Key::Kp2},
{SDLK_KP_3, Key::Kp3},
{SDLK_KP_4, Key::Kp4},
{SDLK_KP_5, Key::Kp5},
{SDLK_KP_6, Key::Kp6},
{SDLK_KP_7, Key::Kp7},
{SDLK_KP_8, Key::Kp8},
{SDLK_KP_9, Key::Kp9},
{SDLK_KP_PERIOD, Key::Kp_period},
{SDLK_KP_DIVIDE, Key::Kp_divide},
{SDLK_KP_MULTIPLY, Key::Kp_multiply},
{SDLK_KP_MINUS, Key::Kp_minus},
{SDLK_KP_PLUS, Key::Kp_plus},
{SDLK_KP_ENTER, Key::Kp_enter},
{SDLK_KP_EQUALS, Key::Kp_equals},
{SDLK_UP, Key::Up},
{SDLK_DOWN, Key::Down},
{SDLK_RIGHT, Key::Right},
{SDLK_LEFT, Key::Left},
{SDLK_INSERT, Key::Insert},
{SDLK_HOME, Key::Home},
{SDLK_END, Key::End},
{SDLK_PAGEUP, Key::PageUp},
{SDLK_PAGEDOWN, Key::PageDown},
{SDLK_F1, Key::F1},
{SDLK_F2, Key::F2},
{SDLK_F3, Key::F3},
{SDLK_F4, Key::F4},
{SDLK_F5, Key::F5},
{SDLK_F6, Key::F6},
{SDLK_F7, Key::F7},
{SDLK_F8, Key::F8},
{SDLK_F9, Key::F9},
{SDLK_F10, Key::F10},
{SDLK_F11, Key::F11},
{SDLK_F12, Key::F12},
{SDLK_F13, Key::F13},
{SDLK_F14, Key::F14},
{SDLK_F15, Key::F15},
{SDLK_NUMLOCKCLEAR, Key::NumLock},
{SDLK_CAPSLOCK, Key::CapsLock},
{SDLK_SCROLLLOCK, Key::ScrollLock},
{SDLK_RSHIFT, Key::RShift},
{SDLK_LSHIFT, Key::LShift},
{SDLK_RCTRL, Key::RCtrl},
{SDLK_LCTRL, Key::LCtrl},
{SDLK_RALT, Key::RAlt},
{SDLK_LALT, Key::LAlt},
{SDLK_RGUI, Key::RGui},
{SDLK_LGUI, Key::LGui},
{SDLK_MODE, Key::AltGr},
{SDLK_APPLICATION, Key::Compose},
{SDLK_HELP, Key::Help},
{SDLK_PRINTSCREEN, Key::PrintScreen},
{SDLK_SYSREQ, Key::SysReq},
{SDLK_PAUSE, Key::Pause},
{SDLK_MENU, Key::Menu},
{SDLK_POWER, Key::Power}
};
return KeyCodeMap.maybe(sym);
}
KeyMod keyModsFromSdlKeyMods(uint16_t mod) {
return static_cast<KeyMod>(mod);
}
MouseButton mouseButtonFromSdlMouseButton(uint8_t button) {
switch (button) {
case SDL_BUTTON_LEFT: return MouseButton::Left;
case SDL_BUTTON_MIDDLE: return MouseButton::Middle;
case SDL_BUTTON_RIGHT: return MouseButton::Right;
case SDL_BUTTON_X1: return MouseButton::FourthButton;
default: return MouseButton::FifthButton;
}
}
ControllerAxis controllerAxisFromSdlControllerAxis(uint8_t axis) {
switch (axis) {
case SDL_CONTROLLER_AXIS_LEFTX: return ControllerAxis::LeftX;
case SDL_CONTROLLER_AXIS_LEFTY: return ControllerAxis::LeftY;
case SDL_CONTROLLER_AXIS_RIGHTX: return ControllerAxis::RightX;
case SDL_CONTROLLER_AXIS_RIGHTY: return ControllerAxis::RightY;
case SDL_CONTROLLER_AXIS_TRIGGERLEFT: return ControllerAxis::TriggerLeft;
case SDL_CONTROLLER_AXIS_TRIGGERRIGHT: return ControllerAxis::TriggerRight;
default: return ControllerAxis::Invalid;
}
}
ControllerButton controllerButtonFromSdlControllerButton(uint8_t button) {
switch (button) {
case SDL_CONTROLLER_BUTTON_A: return ControllerButton::A;
case SDL_CONTROLLER_BUTTON_B: return ControllerButton::B;
case SDL_CONTROLLER_BUTTON_X: return ControllerButton::X;
case SDL_CONTROLLER_BUTTON_Y: return ControllerButton::Y;
case SDL_CONTROLLER_BUTTON_BACK: return ControllerButton::Back;
case SDL_CONTROLLER_BUTTON_GUIDE: return ControllerButton::Guide;
case SDL_CONTROLLER_BUTTON_START: return ControllerButton::Start;
case SDL_CONTROLLER_BUTTON_LEFTSTICK: return ControllerButton::LeftStick;
case SDL_CONTROLLER_BUTTON_RIGHTSTICK: return ControllerButton::RightStick;
case SDL_CONTROLLER_BUTTON_LEFTSHOULDER: return ControllerButton::LeftShoulder;
case SDL_CONTROLLER_BUTTON_RIGHTSHOULDER: return ControllerButton::RightShoulder;
case SDL_CONTROLLER_BUTTON_DPAD_UP: return ControllerButton::DPadUp;
case SDL_CONTROLLER_BUTTON_DPAD_DOWN: return ControllerButton::DPadDown;
case SDL_CONTROLLER_BUTTON_DPAD_LEFT: return ControllerButton::DPadLeft;
case SDL_CONTROLLER_BUTTON_DPAD_RIGHT: return ControllerButton::DPadRight;
case SDL_CONTROLLER_BUTTON_MISC1: return ControllerButton::Misc1;
case SDL_CONTROLLER_BUTTON_PADDLE1: return ControllerButton::Paddle1;
case SDL_CONTROLLER_BUTTON_PADDLE2: return ControllerButton::Paddle2;
case SDL_CONTROLLER_BUTTON_PADDLE3: return ControllerButton::Paddle3;
case SDL_CONTROLLER_BUTTON_PADDLE4: return ControllerButton::Paddle4;
case SDL_CONTROLLER_BUTTON_TOUCHPAD: return ControllerButton::Touchpad;
default: return ControllerButton::Invalid;
}
}
class SdlPlatform {
public:
SdlPlatform(ApplicationUPtr application, StringList cmdLineArgs) {
m_application = std::move(application);
// extract application path from command line args
String applicationPath = cmdLineArgs.first();
cmdLineArgs = cmdLineArgs.slice(1);
StringList platformArguments;
eraseWhere(cmdLineArgs, [&platformArguments](String& argument) {
if (argument.beginsWith("+platform")) {
platformArguments.append(std::move(argument));
return true;
}
return false;
});
Logger::info("Application: Initializing SDL");
if (SDL_Init(0))
throw ApplicationException(strf("Couldn't initialize SDL: {}", SDL_GetError()));
if (char* basePath = SDL_GetBasePath()) {
File::changeDirectory(basePath);
SDL_free(basePath);
}
m_signalHandler.setHandleInterrupt(true);
m_signalHandler.setHandleFatal(true);
try {
Logger::info("Application: startup...");
m_application->startup(cmdLineArgs);
} catch (std::exception const& e) {
throw ApplicationException("Application threw exception during startup", e);
}
Logger::info("Application: Initializing SDL Video");
if (SDL_InitSubSystem(SDL_INIT_VIDEO))
throw ApplicationException(strf("Couldn't initialize SDL Video: {}", SDL_GetError()));
Logger::info("Application: Initializing SDL Controller");
if (SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER))
throw ApplicationException(strf("Couldn't initialize SDL Controller: {}", SDL_GetError()));
#ifdef STAR_SYSTEM_WINDOWS // Newer SDL is defaulting to xaudio2, which does not support audio capture
SDL_setenv("SDL_AUDIODRIVER", "directsound", 1);
#endif
Logger::info("Application: Initializing SDL Audio");
if (SDL_InitSubSystem(SDL_INIT_AUDIO))
throw ApplicationException(strf("Couldn't initialize SDL Audio: {}", SDL_GetError()));
Logger::info("Application: using Audio Driver '{}'", SDL_GetCurrentAudioDriver());
SDL_JoystickEventState(SDL_ENABLE);
m_platformServices = PcPlatformServices::create(applicationPath, platformArguments);
if (!m_platformServices)
Logger::info("Application: No platform services available");
Logger::info("Application: Creating SDL Window");
m_sdlWindow = SDL_CreateWindow(m_windowTitle.utf8Ptr(), SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
m_windowSize[0], m_windowSize[1], SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
if (!m_sdlWindow)
throw ApplicationException::format("Application: Could not create SDL Window: {}", SDL_GetError());
SDL_ShowWindow(m_sdlWindow);
SDL_RaiseWindow(m_sdlWindow);
// Makes the window border black. From https://github.com/libsdl-org/SDL/commit/89948787#diff-f2ae5c36a8afc0a9a343a6664ab306da2963213e180af8cd97b12397dcbb9ae7R1478
#ifdef STAR_SYSTEM_WINDOWS
if (void* handle = SDL_LoadObject("dwmapi.dll")) {
if (auto DwmSetWindowAttributeFunc = (decltype(&DwmSetWindowAttribute))SDL_LoadFunction(handle, "DwmSetWindowAttribute")) {
SDL_SysWMinfo wmInfo{};
SDL_VERSION(&wmInfo.version);
SDL_GetWindowWMInfo(m_sdlWindow, &wmInfo);
DWORD type{}, value{}, count = sizeof(value);
LSTATUS status = RegGetValue(HKEY_CURRENT_USER,
TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize"),
TEXT("AppsUseLightTheme"),
RRF_RT_REG_DWORD, &type, &value, &count);
BOOL enabled = status == ERROR_SUCCESS && type == REG_DWORD && value == 0;
DwmSetWindowAttributeFunc(wmInfo.info.win.window, DWMWA_USE_IMMERSIVE_DARK_MODE, &enabled, sizeof(enabled));
}
SDL_UnloadObject(handle);
}
#endif
int width;
int height;
SDL_GetWindowSize(m_sdlWindow, &width, &height);
m_windowSize = Vec2U(width, height);
m_sdlGlContext = SDL_GL_CreateContext(m_sdlWindow);
if (!m_sdlGlContext)
throw ApplicationException::format("Application: Could not create OpenGL context: {}", SDL_GetError());
SDL_GL_SwapWindow(m_sdlWindow);
setVSyncEnabled(m_windowVSync);
SDL_StopTextInput();
SDL_AudioSpec desired = {};
desired.freq = 44100;
desired.format = AUDIO_S16SYS;
desired.samples = 1024;
desired.channels = 2;
desired.userdata = this;
desired.callback = [](void* userdata, Uint8* stream, int len) {
((SdlPlatform*)(userdata))->getAudioData(stream, len);
};
SDL_AudioSpec obtained = {};
m_sdlAudioOutputDevice = SDL_OpenAudioDevice(NULL, 0, &desired, &obtained, 0);
if (!m_sdlAudioOutputDevice) {
Logger::error("Application: Could not open audio device, no sound available!");
} else if (obtained.freq != desired.freq || obtained.channels != desired.channels || obtained.format != desired.format) {
SDL_CloseAudioDevice(m_sdlAudioOutputDevice);
Logger::error("Application: Could not open 44.1khz / 16 bit stereo audio device, no sound available!");
} else {
Logger::info("Application: Opened default audio device with 44.1khz / 16 bit stereo audio, {} sample size buffer", obtained.samples);
SDL_PauseAudioDevice(m_sdlAudioOutputDevice, 0);
}
m_renderer = make_shared<OpenGl20Renderer>();
m_renderer->setScreenSize(m_windowSize);
m_cursorCache.setTimeToLive(30000);
}
~SdlPlatform() {
if (m_sdlAudioOutputDevice)
SDL_CloseAudioDevice(m_sdlAudioOutputDevice);
closeAudioInputDevice();
m_renderer.reset();
Logger::info("Application: Destroying SDL Window");
SDL_DestroyWindow(m_sdlWindow);
SDL_Quit();
}
bool openAudioInputDevice(const char* name, int freq, int channels, void* userdata, SDL_AudioCallback callback) {
SDL_AudioSpec desired = {};
desired.freq = freq;
desired.format = AUDIO_S16SYS;
desired.samples = 1024;
desired.channels = channels;
desired.userdata = userdata;
desired.callback = callback;
closeAudioInputDevice();
SDL_AudioSpec obtained = {};
m_sdlAudioInputDevice = SDL_OpenAudioDevice(name, 1, &desired, &obtained, 0);
if (m_sdlAudioInputDevice) {
if (name)
Logger::info("Opened audio input device '{}'", name);
else
Logger::info("Opened default audio input device");
SDL_PauseAudioDevice(m_sdlAudioInputDevice, 0);
}
else
Logger::info("Failed to open audio input device: {}", SDL_GetError());
return m_sdlAudioInputDevice != 0;
}
bool closeAudioInputDevice() {
if (m_sdlAudioInputDevice) {
Logger::info("Closing audio input device");
SDL_CloseAudioDevice(m_sdlAudioInputDevice);
m_sdlAudioInputDevice = 0;
return true;
}
return false;
}
void cleanup() {
m_cursorCache.ptr(m_currentCursor);
m_cursorCache.cleanup();
}
void run() {
try {
Logger::info("Application: initialization...");
m_application->applicationInit(make_shared<Controller>(this));
Logger::info("Application: renderer initialization...");
m_application->renderInit(m_renderer);
Logger::info("Application: main update loop...");
m_updateTicker.reset();
m_renderTicker.reset();
bool quit = false;
while (true) {
cleanup();
for (auto const& event : processEvents())
m_application->processInput(event);
if (m_platformServices)
m_platformServices->update();
if (m_platformServices->overlayActive())
SDL_ShowCursor(1);
else
SDL_ShowCursor(m_cursorVisible ? 1 : 0);
int updatesBehind = max<int>(round(m_updateTicker.ticksBehind()), 1);
updatesBehind = min<int>(updatesBehind, m_maxFrameSkip + 1);
for (int i = 0; i < updatesBehind; ++i) {
m_application->update();
m_updateRate = m_updateTicker.tick();
}
m_renderer->startFrame();
m_application->render();
m_renderer->finishFrame();
SDL_GL_SwapWindow(m_sdlWindow);
m_renderRate = m_renderTicker.tick();
if (m_quitRequested) {
Logger::info("Application: quit requested");
quit = true;
}
if (m_signalHandler.interruptCaught()) {
Logger::info("Application: Interrupt caught");
quit = true;
}
if (quit) {
Logger::info("Application: quitting...");
break;
}
int64_t spareMilliseconds = round(m_updateTicker.spareTime() * 1000);
if (spareMilliseconds > 0)
Thread::sleepPrecise(spareMilliseconds);
}
} catch (std::exception const& e) {
Logger::error("Application: exception thrown, shutting down: {}", outputException(e, true));
}
try {
Logger::info("Application: shutdown...");
m_application->shutdown();
} catch (std::exception const& e) {
Logger::error("Application: threw exception during shutdown: {}", outputException(e, true));
}
SDL_CloseAudioDevice(m_sdlAudioOutputDevice);
m_SdlControllers.clear();
SDL_SetCursor(NULL);
m_cursorCache.clear();
m_application.reset();
}
private:
struct Controller : public ApplicationController {
Controller(SdlPlatform* parent)
: parent(parent) {}
Maybe<String> getClipboard() override {
Maybe<String> string;
if (SDL_HasClipboardText()) {
if (auto text = SDL_GetClipboardText()) {
if (*text != '\0')
string.emplace(text);
SDL_free(text);
}
}
return string;
}
void setClipboard(String text) override {
SDL_SetClipboardText(text.utf8Ptr());
}
void setTargetUpdateRate(float targetUpdateRate) override {
parent->m_updateTicker.setTargetTickRate(targetUpdateRate);
}
void setUpdateTrackWindow(float updateTrackWindow) override {
parent->m_updateTicker.setWindow(updateTrackWindow);
}
void setApplicationTitle(String title) override {
parent->m_windowTitle = std::move(title);
if (parent->m_sdlWindow)
SDL_SetWindowTitle(parent->m_sdlWindow, parent->m_windowTitle.utf8Ptr());
}
void setFullscreenWindow(Vec2U fullScreenResolution) override {
if (parent->m_windowMode != WindowMode::Fullscreen || parent->m_windowSize != fullScreenResolution) {
SDL_DisplayMode requestedDisplayMode = {SDL_PIXELFORMAT_RGB888, (int)fullScreenResolution[0], (int)fullScreenResolution[1], 0, 0};
int currentDisplayIndex = SDL_GetWindowDisplayIndex(parent->m_sdlWindow);
SDL_DisplayMode targetDisplayMode;
if (SDL_GetClosestDisplayMode(currentDisplayIndex, &requestedDisplayMode, &targetDisplayMode) != NULL) {
if (SDL_SetWindowDisplayMode(parent->m_sdlWindow, &requestedDisplayMode) == 0) {
if (parent->m_windowMode == WindowMode::Fullscreen)
SDL_SetWindowFullscreen(parent->m_sdlWindow, 0);
else if (parent->m_windowMode == WindowMode::Borderless)
SDL_SetWindowBordered(parent->m_sdlWindow, SDL_TRUE);
else if (parent->m_windowMode == WindowMode::Maximized)
SDL_RestoreWindow(parent->m_sdlWindow);
parent->m_windowMode = WindowMode::Fullscreen;
SDL_SetWindowFullscreen(parent->m_sdlWindow, SDL_WINDOW_FULLSCREEN);
} else {
Logger::warn("Failed to set resolution {}, {}", (unsigned)requestedDisplayMode.w, (unsigned)requestedDisplayMode.h);
}
} else {
Logger::warn("Unable to set requested display resolution {}, {}", (int)fullScreenResolution[0], (int)fullScreenResolution[1]);
}
SDL_DisplayMode actualDisplayMode;
if (SDL_GetWindowDisplayMode(parent->m_sdlWindow, &actualDisplayMode) == 0) {
parent->m_windowSize = {(unsigned)actualDisplayMode.w, (unsigned)actualDisplayMode.h};
// call these manually since no SDL_WindowEvent is triggered when changing between fullscreen resolutions for some reason
parent->m_renderer->setScreenSize(parent->m_windowSize);
parent->m_application->windowChanged(parent->m_windowMode, parent->m_windowSize);
} else {
Logger::error("Couldn't get window display mode!");
}
}
}
void setNormalWindow(Vec2U windowSize) override {
auto window = parent->m_sdlWindow;
if (parent->m_windowMode != WindowMode::Normal || parent->m_windowSize != windowSize) {
if (parent->m_windowMode == WindowMode::Fullscreen)
SDL_SetWindowFullscreen(window, 0);
else if (parent->m_windowMode == WindowMode::Borderless)
SDL_SetWindowBordered(window, SDL_TRUE);
else if (parent->m_windowMode == WindowMode::Maximized)
SDL_RestoreWindow(window);
SDL_SetWindowBordered(window, SDL_TRUE);
SDL_SetWindowSize(window, windowSize[0], windowSize[1]);
SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
parent->m_windowMode = WindowMode::Normal;
parent->m_windowSize = windowSize;
}
}
void setMaximizedWindow() override {
if (parent->m_windowMode != WindowMode::Maximized) {
if (parent->m_windowMode == WindowMode::Fullscreen)
SDL_SetWindowFullscreen(parent->m_sdlWindow, 0);
else if (parent->m_windowMode == WindowMode::Borderless)
SDL_SetWindowBordered(parent->m_sdlWindow, SDL_TRUE);
SDL_RestoreWindow(parent->m_sdlWindow);
SDL_MaximizeWindow(parent->m_sdlWindow);
parent->m_windowMode = WindowMode::Maximized;
}
}
void setBorderlessWindow() override {
if (parent->m_windowMode != WindowMode::Borderless) {
if (parent->m_windowMode == WindowMode::Fullscreen)
SDL_SetWindowFullscreen(parent->m_sdlWindow, 0);
else if (parent->m_windowMode == WindowMode::Maximized)
SDL_RestoreWindow(parent->m_sdlWindow);
SDL_SetWindowBordered(parent->m_sdlWindow, SDL_FALSE);
parent->m_windowMode = WindowMode::Borderless;
SDL_DisplayMode actualDisplayMode;
if (SDL_GetDesktopDisplayMode(SDL_GetWindowDisplayIndex(parent->m_sdlWindow), &actualDisplayMode) == 0) {
parent->m_windowSize = {(unsigned)actualDisplayMode.w, (unsigned)actualDisplayMode.h};
SDL_SetWindowPosition(parent->m_sdlWindow, 0, 0);
SDL_SetWindowSize(parent->m_sdlWindow, parent->m_windowSize[0], parent->m_windowSize[1]);
parent->m_renderer->setScreenSize(parent->m_windowSize);
parent->m_application->windowChanged(parent->m_windowMode, parent->m_windowSize);
} else {
Logger::error("Couldn't get desktop display mode!");
}
}
}
void setVSyncEnabled(bool vSync) override {
if (parent->m_windowVSync != vSync) {
parent->setVSyncEnabled(vSync);
parent->m_windowVSync = vSync;
}
}
void setMaxFrameSkip(unsigned maxFrameSkip) override {
parent->m_maxFrameSkip = maxFrameSkip;
}
void setCursorVisible(bool cursorVisible) override {
parent->m_cursorVisible = cursorVisible;
}
void setCursorPosition(Vec2I cursorPosition) override {
SDL_WarpMouseInWindow(parent->m_sdlWindow, cursorPosition[0], cursorPosition[1]);
}
bool setCursorImage(const String& id, const ImageConstPtr& image, unsigned scale, const Vec2I& offset) override {
return parent->setCursorImage(id, image, scale, offset);
}
void setAcceptingTextInput(bool acceptingTextInput) override {
if (acceptingTextInput != parent->m_acceptingTextInput) {
if (acceptingTextInput)
SDL_StartTextInput();
else
SDL_StopTextInput();
parent->m_acceptingTextInput = acceptingTextInput;
}
}
AudioFormat enableAudio() override {
parent->m_audioEnabled = true;
SDL_PauseAudio(false);
return AudioFormat{44100, 2};
}
void disableAudio() override {
parent->m_audioEnabled = false;
SDL_PauseAudio(true);
}
bool openAudioInputDevice(const char* name, int freq, int channels, void* userdata, AudioCallback callback) override {
return parent->openAudioInputDevice(name, freq, channels, userdata, callback);
};
bool closeAudioInputDevice() override {
return parent->closeAudioInputDevice();
};
float updateRate() const override {
return parent->m_updateRate;
}
float renderFps() const override {
return parent->m_renderRate;
}
StatisticsServicePtr statisticsService() const override {
if (parent->m_platformServices)
return parent->m_platformServices->statisticsService();
return {};
}
P2PNetworkingServicePtr p2pNetworkingService() const override {
if (parent->m_platformServices)
return parent->m_platformServices->p2pNetworkingService();
return {};
}
UserGeneratedContentServicePtr userGeneratedContentService() const override {
if (parent->m_platformServices)
return parent->m_platformServices->userGeneratedContentService();
return {};
}
DesktopServicePtr desktopService() const override {
if (parent->m_platformServices)
return parent->m_platformServices->desktopService();
return {};
}
void quit() override {
parent->m_quitRequested = true;
}
SdlPlatform* parent;
};
List<InputEvent> processEvents() {
List<InputEvent> inputEvents;
SDL_Event event;
while (SDL_PollEvent(&event)) {
Maybe<InputEvent> starEvent;
switch (event.type) {
case SDL_WINDOWEVENT:
if (event.window.event == SDL_WINDOWEVENT_MAXIMIZED || event.window.event == SDL_WINDOWEVENT_RESTORED) {
auto windowFlags = SDL_GetWindowFlags(m_sdlWindow);
if (windowFlags & SDL_WINDOW_MAXIMIZED)
m_windowMode = WindowMode::Maximized;
else if (windowFlags & SDL_WINDOW_FULLSCREEN)
m_windowMode = WindowMode::Fullscreen;
else if (windowFlags & SDL_WINDOW_BORDERLESS)
m_windowMode = WindowMode::Borderless;
else
m_windowMode = WindowMode::Normal;
m_application->windowChanged(m_windowMode, m_windowSize);
} else if (event.window.event == SDL_WINDOWEVENT_RESIZED || event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED) {
m_windowSize = Vec2U(event.window.data1, event.window.data2);
m_renderer->setScreenSize(m_windowSize);
m_application->windowChanged(m_windowMode, m_windowSize);
}
break;
case SDL_KEYDOWN:
if (!event.key.repeat) {
if (auto key = keyFromSdlKeyCode(event.key.keysym.sym))
starEvent.set(KeyDownEvent{*key, keyModsFromSdlKeyMods(event.key.keysym.mod)});
}
break;
case SDL_KEYUP:
if (auto key = keyFromSdlKeyCode(event.key.keysym.sym))
starEvent.set(KeyUpEvent{*key});
break;
case SDL_TEXTINPUT:
starEvent.set(TextInputEvent{String(event.text.text)});
break;
case SDL_MOUSEMOTION:
starEvent.set(MouseMoveEvent{
{event.motion.xrel, -event.motion.yrel}, {event.motion.x, (int)m_windowSize[1] - event.motion.y}});
break;
case SDL_MOUSEBUTTONDOWN:
starEvent.set(MouseButtonDownEvent{mouseButtonFromSdlMouseButton(event.button.button),
{event.button.x, (int)m_windowSize[1] - event.button.y}});
break;
case SDL_MOUSEBUTTONUP:
starEvent.set(MouseButtonUpEvent{mouseButtonFromSdlMouseButton(event.button.button),
{event.button.x, (int)m_windowSize[1] - event.button.y}});
break;
case SDL_MOUSEWHEEL:
int x, y;
SDL_GetMouseState(&x, &y);
starEvent.set(MouseWheelEvent{event.wheel.y < 0 ? MouseWheel::Down : MouseWheel::Up, {x, (int)m_windowSize[1] - y}});
break;
case SDL_CONTROLLERAXISMOTION:
starEvent.set(ControllerAxisEvent{
(ControllerId)event.caxis.which,
controllerAxisFromSdlControllerAxis(event.caxis.axis),
(float)event.caxis.value / 32768.0f
});
break;
case SDL_CONTROLLERBUTTONDOWN:
starEvent.set(ControllerButtonDownEvent{ (ControllerId)event.cbutton.which, controllerButtonFromSdlControllerButton(event.cbutton.button) });
break;
case SDL_CONTROLLERBUTTONUP:
starEvent.set(ControllerButtonUpEvent{ (ControllerId)event.cbutton.which, controllerButtonFromSdlControllerButton(event.cbutton.button) });
break;
case SDL_CONTROLLERDEVICEADDED:
{
auto insertion = m_SdlControllers.insert_or_assign(event.cdevice.which, SDLGameControllerUPtr(SDL_GameControllerOpen(event.cdevice.which), SDL_GameControllerClose));
if (SDL_GameController* controller = insertion.first->second.get())
Logger::info("Controller device '{}' added", SDL_GameControllerName(controller));
}
break;
case SDL_CONTROLLERDEVICEREMOVED:
{
auto find = m_SdlControllers.find(event.cdevice.which);
if (find != m_SdlControllers.end()) {
if (SDL_GameController* controller = find->second.get())
Logger::info("Controller device '{}' removed", SDL_GameControllerName(controller));
m_SdlControllers.erase(event.cdevice.which);
}
}
break;
case SDL_QUIT:
m_quitRequested = true;
starEvent.reset();
break;
}
if (starEvent)
inputEvents.append(starEvent.take());
}
return inputEvents;
}
void getAudioData(Uint8* stream, int len) {
if (m_audioEnabled) {
m_application->getAudioData((int16_t*)stream, len / 4);
} else {
for (int i = 0; i < len; ++i)
stream[i] = 0;
}
}
void setVSyncEnabled(bool vsyncEnabled) {
if (vsyncEnabled) {
// If VSync is requested, try for late swap tearing first, then fall back
// to regular VSync
Logger::info("Application: Enabling VSync with late swap tearing");
if (SDL_GL_SetSwapInterval(-1) < 0) {
Logger::info("Application: Enabling VSync late swap tearing failed, falling back to full VSync");
SDL_GL_SetSwapInterval(1);
}
} else {
Logger::info("Application: Disabling VSync");
SDL_GL_SetSwapInterval(0);
}
}
static const size_t MaximumCursorDimensions = 128;
static const size_t MaximumCursorPixelCount = MaximumCursorDimensions * MaximumCursorDimensions;
bool setCursorImage(const String& id, const ImageConstPtr& image, unsigned scale, const Vec2I& offset) {
auto imageSize = image->size().piecewiseMultiply(Vec2U::filled(scale));
if (!scale || imageSize.max() > MaximumCursorDimensions || (size_t)(imageSize[0] * imageSize[1]) > MaximumCursorPixelCount)
return m_cursorVisible = false;
auto& entry = m_cursorCache.get(m_currentCursor = { scale, offset, id }, [&](auto const&) {
auto entry = std::make_shared<CursorEntry>();
List<ImageOperation> operations;
if (scale != 1)
operations = {
FlipImageOperation{ FlipImageOperation::Mode::FlipY }, // SDL wants an Australian cursor.
BorderImageOperation{ 1, Vec4B(), Vec4B(), false, false }, // Nearest scaling fucks up and clips half off the edges, work around this with border+crop for now.
ScaleImageOperation{ ScaleImageOperation::Mode::Nearest, Vec2F::filled(scale) },
CropImageOperation{ RectI::withSize(Vec2I::filled(ceilf((float)scale / 2)), Vec2I(imageSize)) }
};
else
operations = { FlipImageOperation{ FlipImageOperation::Mode::FlipY } };
auto newImage = std::make_shared<Image>(processImageOperations(operations, *image));
// Fix fully transparent pixels inverting the underlying display pixel on Windows (allowing this could be made configurable per cursor later!)
newImage->forEachPixel([](unsigned /*x*/, unsigned /*y*/, Vec4B& pixel) { if (!pixel[3]) pixel[0] = pixel[1] = pixel[2] = 0; });
entry->image = std::move(newImage);
auto size = entry->image->size();
uint32_t pixelFormat;
switch (entry->image->pixelFormat()) {
case PixelFormat::RGB24: // I know this conversion looks wrong, but it's correct. I'm confused too.
pixelFormat = SDL_PIXELFORMAT_BGR888;
break;
case PixelFormat::RGBA32:
pixelFormat = SDL_PIXELFORMAT_ABGR8888;
break;
case PixelFormat::BGR24:
pixelFormat = SDL_PIXELFORMAT_RGB888;
break;
case PixelFormat::BGRA32:
pixelFormat = SDL_PIXELFORMAT_ARGB8888;
break;
default:
pixelFormat = SDL_PIXELFORMAT_UNKNOWN;
}
entry->sdlSurface.reset(SDL_CreateRGBSurfaceWithFormatFrom(
(void*)entry->image->data(),
size[0], size[1],
entry->image->bitsPerPixel(),
entry->image->bytesPerPixel() * size[0],
pixelFormat)
);
entry->sdlCursor.reset(SDL_CreateColorCursor(entry->sdlSurface.get(), offset[0] * scale, offset[1] * scale));
return entry;
});
SDL_SetCursor(entry->sdlCursor.get());
return m_cursorVisible = true;
}
SignalHandler m_signalHandler;
TickRateApproacher m_updateTicker = TickRateApproacher(60.0f, 1.0f);
float m_updateRate = 0.0f;
TickRateMonitor m_renderTicker = TickRateMonitor(1.0f);
float m_renderRate = 0.0f;
SDL_Window* m_sdlWindow = nullptr;
SDL_GLContext m_sdlGlContext = nullptr;
SDL_AudioDeviceID m_sdlAudioOutputDevice = 0;
SDL_AudioDeviceID m_sdlAudioInputDevice = 0;
typedef std::unique_ptr<SDL_GameController, decltype(&SDL_GameControllerClose)> SDLGameControllerUPtr;
StableHashMap<int, SDLGameControllerUPtr> m_SdlControllers;
typedef std::unique_ptr<SDL_Surface, decltype(&SDL_FreeSurface)> SDLSurfaceUPtr;
typedef std::unique_ptr<SDL_Cursor, decltype(&SDL_FreeCursor)> SDLCursorUPtr;
struct CursorEntry {
ImageConstPtr image = nullptr;
SDLSurfaceUPtr sdlSurface;
SDLCursorUPtr sdlCursor;
CursorEntry() : image(nullptr), sdlSurface(nullptr, SDL_FreeSurface), sdlCursor(nullptr, SDL_FreeCursor) {};
};
typedef tuple<unsigned, Vec2I, String> CursorDescriptor;
HashTtlCache<CursorDescriptor, std::shared_ptr<CursorEntry>> m_cursorCache;
CursorDescriptor m_currentCursor;
Vec2U m_windowSize = {800, 600};
WindowMode m_windowMode = WindowMode::Normal;
String m_windowTitle = "Starbound";
bool m_windowVSync = true;
unsigned m_maxFrameSkip = 5;
bool m_cursorVisible = true;
bool m_acceptingTextInput = false;
bool m_audioEnabled = false;
bool m_quitRequested = false;
OpenGl20RendererPtr m_renderer;
ApplicationUPtr m_application;
PcPlatformServicesUPtr m_platformServices;
};
int runMainApplication(ApplicationUPtr application, StringList cmdLineArgs) {
try {
{
SdlPlatform platform(std::move(application), std::move(cmdLineArgs));
platform.run();
}
Logger::info("Application: stopped gracefully");
return 0;
} catch (std::exception const& e) {
fatalException(e, true);
} catch (...) {
fatalError("Unknown Exception", true);
}
return 1;
}
}
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