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/*
* Copyright 2022 Frederico de Oliveira Linhares
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "candy_gear.h"
#include "color.h"
#include "core.h"
#include "font.h"
#include "graphic.h"
#include "key.h"
#include "log.h"
#include "palette.h"
#include "point.h"
#include "rect.h"
#include "sound.h"
#include "sprite.h"
#include "texture.h"
cg_sCore cg_core;
void handle_error(mrb_state *mrb)
{
mrb_print_error(mrb);
cg_core.quit_game = SDL_TRUE;
}
int main(int argc, char *argv[])
{
SDL_Event event;
Uint32 frame_start;
mrb_state *mrb = mrb_open();
mrb_value main_obj;
mrb_sym sym_init, sym_key_down, sym_key_up, sym_quit, sym_tick;
FILE *fp;
LoaderStack core_loader;
cg_core.config_file = argv[1];
cg_Core_init(&core_loader);
if(!cg_Core_load(&core_loader)) return 1;
if (!mrb) { /* handle error */ }
mrb_define_module(mrb, "CandyGear");
cg_candy_gear_init(mrb);
cg_color_init(mrb);
cg_font_init(mrb);
cg_graphic_init(mrb);
cg_key_init(mrb);
cg_log_init(mrb);
cg_palette_init(mrb);
cg_point_init(mrb);
cg_rect_init(mrb);
cg_sound_init(mrb);
cg_sprite_init(mrb);
cg_texture_init(mrb);
main_obj = mrb_obj_iv_inspect(mrb, mrb->top_self);
sym_init = mrb_intern_cstr(mrb, "init");
sym_key_down = mrb_intern_cstr(mrb, "key_down");
sym_key_up = mrb_intern_cstr(mrb, "key_up");
sym_quit = mrb_intern_cstr(mrb, "quit");
sym_tick = mrb_intern_cstr(mrb, "tick");
fp = fopen(argv[2], "r");
mrb_load_irep_file(mrb, fp);
fclose(fp);
if (mrb->exc) handle_error(mrb);
mrb_funcall_id(mrb, main_obj, sym_init, 0);
if (mrb->exc) handle_error(mrb);
frame_start = SDL_GetTicks();
// Game main loop.
while(!cg_core.quit_game)
{
// Get input.
while(SDL_PollEvent(&event) != 0)
{
switch(event.type)
{
case SDL_KEYDOWN:
mrb_funcall_id(
mrb, main_obj, sym_key_down, 1,
mrb_int_value(mrb, event.key.keysym.sym));
break;
case SDL_KEYUP:
mrb_funcall_id(
mrb, main_obj, sym_key_up, 1,
mrb_int_value(mrb, event.key.keysym.sym));
break;
case SDL_MOUSEMOTION:
break;
case SDL_MOUSEBUTTONDOWN:
break;
case SDL_MOUSEBUTTONUP:
break;
case SDL_QUIT:
mrb_funcall_id(mrb, main_obj, sym_quit, 0);
break;
}
}
// Clear buffer.
SDL_SetRenderDrawColor(cg_core.renderer, 0x00, 0x00, 0x00, 0xff);
SDL_RenderClear(cg_core.renderer);
mrb_funcall_id(mrb, main_obj, sym_tick, 0);
if (mrb->exc) handle_error(mrb);
// Copy buffer to the screen and display it.
SDL_SetRenderTarget(cg_core.renderer, NULL);
SDL_RenderCopy(
cg_core.renderer, cg_core.pre_screen_buffer, NULL, &cg_core.screen_rect);
SDL_RenderPresent(cg_core.renderer);
SDL_SetRenderTarget(cg_core.renderer, cg_core.pre_screen_buffer);
// Timer
{
Uint32 frame_stop, frame_duration;
frame_stop = SDL_GetTicks();
frame_duration = frame_stop - frame_start;
// If frame take less time than maximum allowed.
if(cg_core.max_frame_duration_ms > frame_duration)
SDL_Delay(cg_core.max_frame_duration_ms - frame_duration);
frame_start = frame_stop;
}
}
mrb_close(mrb);
cg_Core_unload(&core_loader);
return 0;
}
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