ascension: src/context.c@f18dc427f86f (annotated)

src/context.c@f18dc427f86f (annotated)

src/context.c

Thu, 18 Apr 2024 21:53:53 +0200

author: Mike Becker <universe@uap-core.de>
date: Thu, 18 Apr 2024 21:53:53 +0200
changeset 64: f18dc427f86f
parent 63: e3cacdd636e4
child 65: 9c44c55d327a
permissions: -rw-r--r--

make use of the asc_window_active macro

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  * Copyright 2023 Mike Becker. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include "ascension/context.h"
 #include "ascension/error.h"
 #include "ascension/utils.h"
 #include <SDL2/SDL.h>
 #include <SDL2/SDL_ttf.h>
 #include <time.h>
 AscContext asc_context;
 static uint64_t asc_nanos(void) {
     struct timespec ts;
     clock_gettime(CLOCK_MONOTONIC, &ts);
     return 1000000000ull*(uint64_t)ts.tv_sec + (uint64_t)ts.tv_nsec;
 }
 void asc_context_initialize(void) {
     if (asc_test_flag(asc_context.flags, ASC_FLAG_INITILIZED))
         return;
     memset(&asc_context, 0, sizeof(AscContext));
     // initialize error buffer
     cxBufferInit(
             &asc_context.error_buffer,
             NULL,
 ,
             NULL,
             CX_BUFFER_AUTO_EXTEND
     );
     // initialize SDL
     if (SDL_Init(SDL_INIT_VIDEO) < 0) {
         asc_error(SDL_GetError());
     } else {
         if (TTF_Init() < 0) {
             asc_error(TTF_GetError());
         }
     }
     SDL_ClearError();
     asc_context.total_nanos = asc_nanos();
     asc_set_flag(asc_context.flags, ASC_FLAG_INITILIZED);
     asc_dprintf("Ascension context initialized.");
 }
 void asc_context_destroy(void) {
     for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {
         asc_window_destroy(&asc_context.windows[i]);
     }
     asc_font_cache_clear();
     // quit SDL
     if (TTF_WasInit())
         TTF_Quit();
     SDL_Quit();
     // destroy the error buffer
     cxBufferDestroy(&asc_context.error_buffer);
     asc_context.flags = 0;
     asc_dprintf("Ascension context destroyed.");
 }
 void asc_context_quit(void) {
     asc_set_flag(asc_context.flags, ASC_FLAG_QUIT);
 }
 static void asc_event_window_resized(Uint32 id, Sint32 width, Sint32 height) {
     for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {
         if (asc_context.windows[i].id == id) {
             asc_vec2i dimensions = (asc_vec2i) {width, height};
             asc_context.windows[i].resized = true;
             asc_context.windows[i].dimensions = dimensions;
             return;
         }
     }
 }
 bool asc_loop_next(void) {
     // reset mouse motion
     asc_context.input.mouse_xrel = 0;
     asc_context.input.mouse_yrel = 0;
     // dispatch SDL events
     SDL_Event event;
     while (SDL_PollEvent(&event)) {
         switch (event.type) {
             case SDL_QUIT:
                 asc_set_flag(asc_context.flags, ASC_FLAG_QUIT);
                 break;
             case SDL_WINDOWEVENT: {
                 if (event.window.event == SDL_WINDOWEVENT_RESIZED)
                     asc_event_window_resized(
                             event.window.windowID,
                             event.window.data1,
                             event.window.data2
                     );
                 break;
             }
             case SDL_MOUSEMOTION: {
                 // accumulate relative motion
                 asc_context.input.mouse_xrel += event.motion.xrel;
                 asc_context.input.mouse_yrel += event.motion.yrel;
                 // update absolute position
                 asc_context.input.mouse_x = event.motion.x;
                 asc_context.input.mouse_y = event.motion.y;
                 break;
             }
             case SDL_KEYDOWN:
                 asc_context.input.keys[event.key.keysym.scancode] = true;
                 break;
             case SDL_KEYUP:
                 asc_context.input.keys[event.key.keysym.scancode] = false;
                 break;
         }
     }
     // sync the windows
     for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) {
         if (asc_context.windows[i].id > 0) {
             asc_window_sync(&asc_context.windows[i]);
         }
     }
     // compute frame time
     uint64_t frame_nanos, ns;
     do {
         ns = asc_nanos();
         frame_nanos = ns - asc_context.total_nanos;
     } while (frame_nanos == 0);
     asc_context.frame_nanos = frame_nanos;
     asc_context.total_nanos = ns;
     return !asc_test_flag(asc_context.flags, ASC_FLAG_QUIT);
 }

Mercurial > hg > ascension / annotate

src/context.c@f18dc427f86f (annotated)

src/context.c