86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
/* -*- tab-width: 4; -*- */
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/* vi: set sw=2 ts=4 expandtab: */
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#ifndef APP_BASE_SDL_H_1456211087
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#define APP_BASE_SDL_H_1456211087
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/* $Id: f63e0a9e6eed51ed84a8eea1eff0708c8a6af22b $ */
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/*
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* Copyright 2015-2020 Mark Callow.
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @internal
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* @file
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* @~English
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*
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* @brief Declarations for App framework using SDL.
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*/
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#include <SDL3/SDL.h>
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#include <string>
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#include <vector>
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class AppBaseSDL {
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public:
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typedef Uint64 ticks_t;
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typedef std::vector<std::string> Args;
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AppBaseSDL(const char* const name) : szName(name), appTitle(name) { }
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virtual bool initialize(Args& args);
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virtual void finalize();
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// Ticks in milliseconds since start.
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virtual void drawFrame(uint32_t) { }
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// When used with SDL_SetEventWatch, return value is ignored. When used
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// with SDL_SetEventFilter, 1 causes event to be added to SDL's internal
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// event queue, 0 causes it to be dropped.
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virtual bool doEvent(SDL_Event* event);
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virtual void onFPSUpdate();
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virtual SDL_Window* getMainWindow() { return pswMainWindow; }
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void drawFrame();
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void initializeFPSTimer();
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const char* name() { return szName; }
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const std::string getAssetPath() { return sBasePath; }
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// Sets title to be used on window title bar. Content of szExtra ia
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// appended to the app name.
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virtual void setAppTitle(const char* const szExtra);
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static bool onEvent(void* userdata, SDL_Event* event) {
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return ((AppBaseSDL *)userdata)->doEvent(event);
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}
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static void onDrawFrame(void* userdata) {
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((AppBaseSDL *)userdata)->drawFrame();
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}
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protected:
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// Sets text on window title bar. Fps value is preprended to appTitle.
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virtual void setWindowTitle();
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ticks_t startTicks;
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float lastFrameTime; // ms
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struct fpsCounter {
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ticks_t startTicks;
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int numFrames;
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float lastFPS;
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} fpsCounter;
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SDL_Window* pswMainWindow;
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const char* const szName;
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std::string appTitle;
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std::string sBasePath;
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};
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extern class AppBaseSDL* theApp;
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#endif /* APP_BASE_SDL_H_1456211087 */
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