182 lines
4.5 KiB
C
182 lines
4.5 KiB
C
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/*
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* Copyright (c) 2014, 2015, 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* nyan.c
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* Window with animated nyancat.
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*/
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#include <sys/socket.h>
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#include <sys/keycodes.h>
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#include <sys/un.h>
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#include <assert.h>
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#include <endian.h>
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#include <errno.h>
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#include <error.h>
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#include <ioleast.h>
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#include <locale.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <timespec.h>
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#include <unistd.h>
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#include <display.h>
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#include "nyan.h"
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#include "pixel.h"
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uint32_t WINDOW_ID = 0;
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uint32_t WINDOW_WIDTH = 0;
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uint32_t WINDOW_HEIGHT = 0;
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bool need_redraw = true;
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bool need_show = true;
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bool need_exit = false;
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void on_disconnect(void* ctx)
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{
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(void) ctx;
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need_exit = true;
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}
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void on_quit(void* ctx, uint32_t window_id)
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{
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(void) ctx;
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if ( window_id != WINDOW_ID )
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return;
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need_exit = true;
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}
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void on_resize(void* ctx, uint32_t window_id, uint32_t width, uint32_t height)
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{
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(void) ctx;
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if ( window_id != WINDOW_ID )
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return;
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need_redraw = true;
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WINDOW_WIDTH = width;
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WINDOW_HEIGHT = height;
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}
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void on_keyboard(void* ctx, uint32_t window_id, uint32_t codepoint)
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{
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(void) ctx;
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if ( window_id != WINDOW_ID )
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return;
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(void) codepoint;
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}
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int main(int argc, char* argv[])
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{
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(void) argc;
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(void) argv;
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setlocale(LC_ALL, "");
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setvbuf(stdout, NULL, _IOLBF, 0);
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struct display_connection* connection = display_connect_default();
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if ( !connection && errno == ECONNREFUSED )
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display_spawn(argc, argv);
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if ( !connection )
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error(1, errno, "Could not connect to display server");
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WINDOW_WIDTH = 600;
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WINDOW_HEIGHT = 600;
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display_create_window(connection, WINDOW_ID);
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display_resize_window(connection, WINDOW_ID, WINDOW_WIDTH, WINDOW_HEIGHT);
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display_title_window(connection, WINDOW_ID, "Nyanyanyanyanyanyanya...");
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struct timespec frame_duration = timespec_make(0, 90 * 1000 * 1000);
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struct timespec last_frame;
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clock_gettime(CLOCK_MONOTONIC, &last_frame);
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int frame_num = 0;
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while ( !need_exit )
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{
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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struct timespec since_last_frame = timespec_sub(now, last_frame);
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if ( !need_redraw && timespec_lt(since_last_frame, frame_duration) )
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{
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struct timespec remainder = timespec_sub(frame_duration, since_last_frame);
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if ( timespec_lt(remainder, timespec_make(0, 10 * 1000 * 1000)) )
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remainder = timespec_make(0, 10 * 1000 * 1000);
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nanosleep(&remainder, NULL);
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continue;
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}
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while ( timespec_le(frame_duration, since_last_frame) )
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{
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if ( !nyan_frames[++frame_num] )
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frame_num = 0;
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need_redraw = true;
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since_last_frame = timespec_sub(since_last_frame, frame_duration);
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}
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if ( need_redraw )
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{
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last_frame = now;
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uint32_t* framebuffer = (uint32_t*) malloc(sizeof(uint32_t) * WINDOW_WIDTH * WINDOW_HEIGHT);
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const char* const* frame = nyan_frames[frame_num];
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for ( size_t y = 0; y < WINDOW_HEIGHT; y++ )
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{
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int yi = y * NYAN_FRAME_HEIGHT / WINDOW_HEIGHT;
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const char* line = frame[yi];
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for ( size_t x = 0; x < WINDOW_WIDTH; x++ )
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{
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int xi = x * NYAN_FRAME_WIDTH / WINDOW_WIDTH;
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char elem = line[xi];
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const uint8_t* cc = nyan_palette[nyan_palette_of_char(elem)];
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framebuffer[y * WINDOW_WIDTH + x] = make_color_a(cc[0], cc[1], cc[2], cc[3]);;
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}
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}
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display_render_window(connection, WINDOW_ID, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, framebuffer);
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free(framebuffer);
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need_redraw = false;
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}
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if ( need_show )
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{
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display_show_window(connection, WINDOW_ID);
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need_show = false;
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}
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struct display_event_handlers handlers;
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memset(&handlers, 0, sizeof(handlers));
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handlers.disconnect_handler = on_disconnect;
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handlers.quit_handler = on_quit;
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handlers.resize_handler = on_resize;
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handlers.keyboard_handler = on_keyboard;
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while ( display_poll_event(connection, &handlers) == 0 );
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}
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display_disconnect(connection);
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return 0;
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}
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