archeus/src/engine/engine.c

#include "arc/engine/engine.h"
#include <SDL_video.h>
#include <stdlib.h>
#include "arc/engine/state.h"
#include "arc/graphics/window.h"
#include "arc/graphics/renderer.h"
#include "arc/input/mouse.h"
#include "arc/input/keyboard.h"
#include "arc/std/errno.h"
#include "arc/std/handler.h"

//NOTE: some of this file is temporary, mostly to get smthn running so I can test out different ideas
#ifdef ARC_SDL
#include <SDL.h>
#include "arc/graphics/sdl/window.h"
#include "arc/graphics/sdl/renderer.h"
#include "arc/input/sdl/mouse.h"
#include "arc/input/sdl/keyboard.h"
#endif // ARC_SDL

void ARC_EngineData_Create(ARC_EngineData **data, ARC_Handler_CleanDataFn cleanfn){
    *data = (ARC_EngineData *)malloc(sizeof(ARC_EngineData));
    (*data)->window   = NULL;
    (*data)->renderer = NULL;
    (*data)->mouse    = NULL;

    ARC_Handler_Create(&((*data)->state), cleanfn);

    ARC_WindowInfo   windowInfo;
    ARC_RenderInfo   renderInfo;
    ARC_MouseInfo    mouseInfo;
    ARC_KeyboardInfo keyboardInfo;
    
    (*data)->windowSize = (ARC_Point){ 2560, 1440 };

#ifdef ARC_SDL
    windowInfo = (ARC_WindowInfo){ "title", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, (*data)->windowSize.x, (*data)->windowSize.y, 0 };
#endif // ARC_SDL

    ARC_Window_Create(&((*data)->window), &windowInfo);
    if(arc_errno){
        free(data);
        return;
    }

#ifdef ARC_SDL
    renderInfo = (ARC_RenderInfo){ (SDL_Window *)(*data)->window->window, -1, SDL_RENDERER_ACCELERATED };
#endif // ARC_SDL

    ARC_Renderer_Create(&((*data)->renderer), &renderInfo);
    if(arc_errno){
        ARC_Window_Destroy((*data)->window);
        free(data);
    }

#ifdef ARC_SDL
    SDL_Event *event = (SDL_Event *)malloc(sizeof(SDL_Event));
    mouseInfo    = (ARC_MouseInfo   ){ event };
    keyboardInfo = (ARC_KeyboardInfo){ event };
#endif // ARC_SDL

    ARC_Mouse_Create(&((*data)->mouse), &mouseInfo);

    ARC_Keyboard_Create(&((*data)->keyboard), &keyboardInfo);
}

void ARC_EngineData_Destroy(ARC_EngineData *data){
#ifdef ARC_SDL
    free(data->mouse->event);
#endif // ARC_SDL

    ARC_Mouse_Destroy(data->mouse);
    ARC_Keyboard_Destroy(data->keyboard);
    ARC_Renderer_Destroy(data->renderer);
    ARC_Window_Destroy(data->window);
    ARC_Handler_Destroy(data->state);
}

void ARC_Engine_Run(ARC_EngineData *data){
    if(arc_errno){
        return;
    }

#ifdef ARC_SDL
    SDL_Event *event = data->mouse->event;
#endif // ARC_SDL

    double lastTime = 0, currentTime;

    data->dt = 0;
    data->running = 0;

    while(!data->running){
#ifdef ARC_SDL
        currentTime = SDL_GetTicks();
        data->dt = currentTime - lastTime;
        lastTime = currentTime;

        SDL_PollEvent(data->mouse->event);
        if(event->type == SDL_QUIT){ return; }
        if(event->type == SDL_KEYDOWN && event->key.keysym.sym == SDLK_ESCAPE){ return; }
#endif // ARC_SDL

        ARC_Mouse_Update(data->mouse);

        ARC_Keyboard_Update(data->keyboard);

        ARC_Handler_Clean(data->state);

        ARC_Handler_Iterate(data->state, ARC_State_Update);

        ARC_Renderer_Clear(data->renderer);

        ARC_Handler_Iterate(data->state, ARC_State_Render);

        ARC_Renderer_Render(data->renderer);
    }
}