clients/flower.c

   1 /*
   2  * Copyright © 2008 Kristian Høgsberg
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <stdint.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <time.h>
  30 #include <math.h>
  31 #include <cairo.h>
  32 #include <sys/time.h>
  33
  34 #include <linux/input.h>
  35 #include <wayland-client.h>
  36 #include "window.h"
  37
  38 struct flower {
  39         struct display *display;
  40         struct window *window;
  41         struct widget *widget;
  42         int width, height;
  43 };
  44
  45 static void
  46 set_random_color(cairo_t *cr)
  47 {
  48         cairo_set_source_rgba(cr,
  49                               0.5 + (random() % 50) / 49.0,
  50                               0.5 + (random() % 50) / 49.0,
  51                               0.5 + (random() % 50) / 49.0,
  52                               0.5 + (random() % 100) / 99.0);
  53 }
  54
  55
  56 static void
  57 draw_stuff(cairo_surface_t *surface, int width, int height)
  58 {
  59         const int petal_count = 3 + random() % 5;
  60         const double r1 = 60 + random() % 35;
  61         const double r2 = 20 + random() % 40;
  62         const double u = (10 + random() % 90) / 100.0;
  63         const double v = (random() % 90) / 100.0;
  64
  65         cairo_t *cr;
  66         int i;
  67         double t, dt = 2 * M_PI / (petal_count * 2);
  68         double x1, y1, x2, y2, x3, y3;
  69
  70         cr = cairo_create(surface);
  71         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
  72         cairo_set_source_rgba(cr, 0, 0, 0, 0);
  73         cairo_paint(cr);
  74
  75         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
  76         cairo_translate(cr, width / 2, height / 2);
  77         cairo_move_to(cr, cos(0) * r1, sin(0) * r1);
  78         for (t = 0, i = 0; i < petal_count; i++, t += dt * 2) {
  79                 x1 = cos(t) * r1;
  80                 y1 = sin(t) * r1;
  81                 x2 = cos(t + dt) * r2;
  82                 y2 = sin(t + dt) * r2;
  83                 x3 = cos(t + 2 * dt) * r1;
  84                 y3 = sin(t + 2 * dt) * r1;
  85
  86                 cairo_curve_to(cr,
  87                                x1 - y1 * u, y1 + x1 * u,
  88                                x2 + y2 * v, y2 - x2 * v,
  89                                x2, y2);
  90
  91                 cairo_curve_to(cr,
  92                                x2 - y2 * v, y2 + x2 * v,
  93                                x3 + y3 * u, y3 - x3 * u,
  94                                x3, y3);
  95         }
  96
  97         cairo_close_path(cr);
  98         set_random_color(cr);
  99         cairo_fill_preserve(cr);
 100         set_random_color(cr);
 101         cairo_stroke(cr);
 102
 103         cairo_destroy(cr);
 104 }
 105
 106 static void
 107 resize_handler(struct widget *widget,
 108                int32_t width, int32_t height, void *data)
 109 {
 110         struct flower *flower = data;
 111
 112         /* Dont resize me */
 113         widget_set_size(flower->widget, flower->width, flower->height);
 114 }
 115
 116 static void
 117 redraw_handler(struct widget *widget, void *data)
 118 {
 119         struct flower *flower = data;
 120         cairo_surface_t *surface;
 121
 122         surface = window_get_surface(flower->window);
 123         if (surface == NULL ||
 124             cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
 125                 fprintf(stderr, "failed to create cairo egl surface\n");
 126                 return;
 127         }
 128
 129         draw_stuff(surface, flower->width, flower->height);
 130         cairo_surface_destroy(surface);
 131 }
 132
 133 static void
 134 button_handler(struct widget *widget,
 135                struct input *input, uint32_t time,
 136                uint32_t button, enum wl_pointer_button_state state, void *data)
 137 {
 138         struct flower *flower = data;
 139
 140         switch (button) {
 141         case BTN_LEFT:
 142                 if (state == WL_POINTER_BUTTON_STATE_PRESSED)
 143                         window_move(flower->window, input,
 144                                     display_get_serial(flower->display));
 145                 break;
 146         case BTN_MIDDLE:
 147                 if (state == WL_POINTER_BUTTON_STATE_PRESSED)
 148                         widget_schedule_redraw(widget);
 149                 break;
 150         case BTN_RIGHT:
 151                 if (state == WL_POINTER_BUTTON_STATE_PRESSED)
 152                         window_show_frame_menu(flower->window, input, time);
 153                 break;
 154         }
 155 }
 156
 157 static void
 158 touch_down_handler(struct widget *widget, struct input *input,
 159                    uint32_t serial, uint32_t time, int32_t id,
 160                    float x, float y, void *data)
 161 {
 162         struct flower *flower = data;
 163         window_move(flower->window, input, display_get_serial(flower->display));
 164 }
 165
 166 int main(int argc, char *argv[])
 167 {
 168         struct flower flower;
 169         struct display *d;
 170         struct timeval tv;
 171
 172         d = display_create(&argc, argv);
 173         if (d == NULL) {
 174                 fprintf(stderr, "failed to create display: %m\n");
 175                 return -1;
 176         }
 177
 178         gettimeofday(&tv, NULL);
 179         srandom(tv.tv_usec);
 180
 181         flower.width = 200;
 182         flower.height = 200;
 183         flower.display = d;
 184         flower.window = window_create(d);
 185         flower.widget = window_add_widget(flower.window, &flower);
 186         window_set_title(flower.window, "Flower");
 187
 188         widget_set_resize_handler(flower.widget, resize_handler);
 189         widget_set_redraw_handler(flower.widget, redraw_handler);
 190         widget_set_button_handler(flower.widget, button_handler);
 191         widget_set_default_cursor(flower.widget, CURSOR_HAND1);
 192         widget_set_touch_down_handler(flower.widget, touch_down_handler);
 193
 194         window_schedule_resize(flower.window, flower.width, flower.height);
 195
 196         display_run(d);
 197
 198         widget_destroy(flower.widget);
 199         window_destroy(flower.window);
 200         display_destroy(d);
 201
 202         return 0;
 203 }