80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
// Copyright 2019 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CAST_STANDALONE_RECEIVER_SDL_GLUE_H_
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#define CAST_STANDALONE_RECEIVER_SDL_GLUE_H_
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#include <stdint.h>
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#include <functional>
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#include <memory>
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
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#include <SDL2/SDL.h>
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#pragma GCC diagnostic pop
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#include "util/alarm.h"
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namespace openscreen {
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class TaskRunner;
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namespace cast {
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template <uint32_t subsystem>
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class ScopedSDLSubSystem {
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public:
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ScopedSDLSubSystem() { SDL_InitSubSystem(subsystem); }
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~ScopedSDLSubSystem() { SDL_QuitSubSystem(subsystem); }
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};
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// Macro that, for an SDL_Foo, generates code for:
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//
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// using SDLFooUniquePtr = std::unique_ptr<SDL_Foo, SDLFooDestroyer>;
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// SDLFooUniquePtr MakeUniqueSDLFoo(...args...);
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#define DEFINE_SDL_UNIQUE_PTR(name) \
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struct SDL##name##Destroyer { \
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void operator()(SDL_##name* obj) const { \
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if (obj) { \
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SDL_Destroy##name(obj); \
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} \
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} \
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}; \
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using SDL##name##UniquePtr = \
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std::unique_ptr<SDL_##name, SDL##name##Destroyer>; \
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template <typename... Args> \
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SDL##name##UniquePtr MakeUniqueSDL##name(Args&&... args) { \
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return SDL##name##UniquePtr( \
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SDL_Create##name(std::forward<Args>(args)...)); \
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}
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DEFINE_SDL_UNIQUE_PTR(Window);
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DEFINE_SDL_UNIQUE_PTR(Renderer);
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DEFINE_SDL_UNIQUE_PTR(Texture);
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#undef DEFINE_SDL_UNIQUE_PTR
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// A looping mechanism that runs the SDL event loop by scheduling periodic tasks
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// to the given TaskRunner. Looping continues indefinitely, until the instance
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// is destroyed. A client-provided quit callback is invoked whenever a SDL_QUIT
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// event is received.
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class SDLEventLoopProcessor {
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public:
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SDLEventLoopProcessor(TaskRunner* task_runner,
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std::function<void()> quit_callback);
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~SDLEventLoopProcessor();
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private:
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void ProcessPendingEvents();
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Alarm alarm_;
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std::function<void()> quit_callback_;
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};
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} // namespace cast
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} // namespace openscreen
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#endif // CAST_STANDALONE_RECEIVER_SDL_GLUE_H_
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