151 lines
4.1 KiB
C
151 lines
4.1 KiB
C
/*
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* Copyright © 2008 Kristian Høgsberg
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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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 <fcntl.h>
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#include <unistd.h>
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#include <math.h>
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#include <time.h>
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#include <cairo.h>
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#include <glib.h>
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#include "wayland-client.h"
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#include "wayland-glib.h"
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#include "window.h"
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static void
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set_random_color(cairo_t *cr)
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{
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cairo_set_source_rgba(cr,
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0.5 + (random() % 50) / 49.0,
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0.5 + (random() % 50) / 49.0,
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0.5 + (random() % 50) / 49.0,
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0.5 + (random() % 100) / 99.0);
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}
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static void
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draw_stuff(cairo_surface_t *surface, int width, int height)
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{
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const int petal_count = 3 + random() % 5;
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const double r1 = 60 + random() % 35;
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const double r2 = 20 + random() % 40;
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const double u = (10 + random() % 90) / 100.0;
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const double v = (random() % 90) / 100.0;
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cairo_t *cr;
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int i;
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double t, dt = 2 * M_PI / (petal_count * 2);
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double x1, y1, x2, y2, x3, y3;
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cr = cairo_create(surface);
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cairo_translate(cr, width / 2, height / 2);
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cairo_move_to(cr, cos(0) * r1, sin(0) * r1);
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for (t = 0, i = 0; i < petal_count; i++, t += dt * 2) {
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x1 = cos(t) * r1;
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y1 = sin(t) * r1;
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x2 = cos(t + dt) * r2;
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y2 = sin(t + dt) * r2;
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x3 = cos(t + 2 * dt) * r1;
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y3 = sin(t + 2 * dt) * r1;
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cairo_curve_to(cr,
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x1 - y1 * u, y1 + x1 * u,
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x2 + y2 * v, y2 - x2 * v,
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x2, y2);
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cairo_curve_to(cr,
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x2 - y2 * v, y2 + x2 * v,
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x3 + y3 * u, y3 - x3 * u,
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x3, y3);
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}
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cairo_close_path(cr);
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set_random_color(cr);
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cairo_fill_preserve(cr);
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set_random_color(cr);
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cairo_stroke(cr);
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cairo_destroy(cr);
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}
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struct flower {
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struct window *window;
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int x, y, width, height;
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int offset;
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};
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static void
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handle_frame(struct window *window,
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uint32_t frame, uint32_t timestamp, void *data)
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{
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struct flower *flower = data;
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window_move(flower->window,
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flower->x + cos((flower->offset + timestamp) / 400.0) * 400 - flower->width / 2,
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flower->y + sin((flower->offset + timestamp) / 320.0) * 300 - flower->height / 2);
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window_commit(flower->window, 0);
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}
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int main(int argc, char *argv[])
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{
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cairo_surface_t *s;
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struct timespec ts;
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struct flower flower;
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struct display *d;
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d = display_create(&argc, &argv, NULL);
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flower.x = 512;
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flower.y = 384;
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flower.width = 200;
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flower.height = 200;
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flower.window = window_create(d, "flower", flower.x, flower.y,
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flower.width, flower.height);
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clock_gettime(CLOCK_MONOTONIC, &ts);
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srandom(ts.tv_nsec);
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flower.offset = random();
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window_set_decoration(flower.window, 0);
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window_draw(flower.window);
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s = window_get_surface(flower.window);
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if (s == NULL || cairo_surface_status (s) != CAIRO_STATUS_SUCCESS) {
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fprintf(stderr, "failed to create cairo drm surface\n");
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return -1;
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}
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draw_stuff(s, flower.width, flower.height);
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cairo_surface_flush(s);
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window_set_frame_handler(flower.window, handle_frame, &flower);
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window_commit(flower.window, 0);
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display_run(d);
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return 0;
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}
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