Sun, 11 Aug 2024 15:43:01 +0200
update to recent snapshot of UCX 3.1
/* * 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; } // forward declare non-public font cache functions void asc_font_cache_init(void); void asc_font_cache_destroy(void); void asc_context_initialize(void) { if (asc_test_flag(asc_context.flags, ASC_FLAG_INITILIZED)) return; memset(&asc_context, 0, sizeof(AscContext)); // initialize the font cache asc_font_cache_init(); // set a default font, but do not load it asc_context.active_font.style = ASC_FONT_REGULAR; asc_context.active_font.size = 14; // no window, yet asc_context.active_window = ASC_MAX_WINDOWS; // initialize error buffer cxBufferInit( &asc_context.error_buffer, NULL, 256, 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) { // destroy windows for (unsigned int i = 0 ; i < ASC_MAX_WINDOWS ; i++) { asc_window_destroy(i); } // destroy the font cache asc_font_cache_destroy(); // 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); } AscWindow *asc_active_window_assert() { if (asc_context.active_window < ASC_MAX_WINDOWS) { return &asc_context.windows[asc_context.active_window]; } else { asc_dprintf("Window access attempted without active window"); abort(); } } 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++) { asc_window_sync(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); }