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 <stdint.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <time.h>
  28 #include <math.h>
  29 #include <cairo.h>
  30 #include <sys/time.h>
  31
  32 #include <linux/input.h>
  33 #include <wayland-client.h>
  34 #include "window.h"
  35
  36 struct flower {
  37         struct display *display;
  38         struct window *window;
  39         struct widget *widget;
  40         int width, height;
  41 };
  42
  43 static void
  44 set_random_color(cairo_t *cr)
  45 {
  46         cairo_set_source_rgba(cr,
  47                               0.5 + (random() % 50) / 49.0,
  48                               0.5 + (random() % 50) / 49.0,
  49                               0.5 + (random() % 50) / 49.0,
  50                               0.5 + (random() % 100) / 99.0);
  51 }
  52
  53
  54 static void
  55 draw_stuff(cairo_surface_t *surface, int width, int height)
  56 {
  57         const int petal_count = 3 + random() % 5;
  58         const double r1 = 60 + random() % 35;
  59         const double r2 = 20 + random() % 40;
  60         const double u = (10 + random() % 90) / 100.0;
  61         const double v = (random() % 90) / 100.0;
  62
  63         cairo_t *cr;
  64         int i;
  65         double t, dt = 2 * M_PI / (petal_count * 2);
  66         double x1, y1, x2, y2, x3, y3;
  67
  68         cr = cairo_create(surface);
  69         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
  70         cairo_set_source_rgba(cr, 0, 0, 0, 0);
  71         cairo_paint(cr);
  72
  73         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
  74         cairo_translate(cr, width / 2, height / 2);
  75         cairo_move_to(cr, cos(0) * r1, sin(0) * r1);
  76         for (t = 0, i = 0; i < petal_count; i++, t += dt * 2) {
  77                 x1 = cos(t) * r1;
  78                 y1 = sin(t) * r1;
  79                 x2 = cos(t + dt) * r2;
  80                 y2 = sin(t + dt) * r2;
  81                 x3 = cos(t + 2 * dt) * r1;
  82                 y3 = sin(t + 2 * dt) * r1;
  83
  84                 cairo_curve_to(cr,
  85                                x1 - y1 * u, y1 + x1 * u,
  86                                x2 + y2 * v, y2 - x2 * v,
  87                                x2, y2);
  88
  89                 cairo_curve_to(cr,
  90                                x2 - y2 * v, y2 + x2 * v,
  91                                x3 + y3 * u, y3 - x3 * u,
  92                                x3, y3);
  93         }
  94
  95         cairo_close_path(cr);
  96         set_random_color(cr);
  97         cairo_fill_preserve(cr);
  98         set_random_color(cr);
  99         cairo_stroke(cr);
 100
 101         cairo_destroy(cr);
 102 }
 103
 104 static void
 105 resize_handler(struct widget *widget,
 106                int32_t width, int32_t height, void *data)
 107 {
 108         struct flower *flower = data;
 109
 110         /* Dont resize me */
 111         widget_set_size(flower->widget, flower->width, flower->height);
 112 }
 113
 114 static void
 115 redraw_handler(struct widget *widget, void *data)
 116 {
 117         struct flower *flower = data;
 118         cairo_surface_t *surface;
 119
 120         surface = window_get_surface(flower->window);
 121         if (surface == NULL ||
 122             cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
 123                 fprintf(stderr, "failed to create cairo egl surface\n");
 124                 return;
 125         }
 126
 127         draw_stuff(surface, flower->width, flower->height);
 128         cairo_surface_destroy(surface);
 129 }
 130
 131 static void
 132 button_handler(struct widget *widget,
 133                struct input *input, uint32_t time,
 134                uint32_t button, enum wl_pointer_button_state state, void *data)
 135 {
 136         struct flower *flower = data;
 137
 138         switch (button) {
 139         case BTN_LEFT:
 140                 if (state == WL_POINTER_BUTTON_STATE_PRESSED)
 141                         window_move(flower->window, input,
 142                                     display_get_serial(flower->display));
 143                 break;
 144         case BTN_MIDDLE:
 145                 if (state == WL_POINTER_BUTTON_STATE_PRESSED)
 146                         widget_schedule_redraw(widget);
 147                 break;
 148         case BTN_RIGHT:
 149                 if (state == WL_POINTER_BUTTON_STATE_PRESSED)
 150                         window_show_frame_menu(flower->window, input, time);
 151                 break;
 152         }
 153 }
 154
 155 static void
 156 touch_down_handler(struct widget *widget, struct input *input,
 157                    uint32_t serial, uint32_t time, int32_t id,
 158                    float x, float y, void *data)
 159 {
 160         struct flower *flower = data;
 161         window_move(flower->window, input, display_get_serial(flower->display));
 162 }
 163
 164 int main(int argc, char *argv[])
 165 {
 166         struct flower flower;
 167         struct display *d;
 168         struct timeval tv;
 169
 170         d = display_create(&argc, argv);
 171         if (d == NULL) {
 172                 fprintf(stderr, "failed to create display: %m\n");
 173                 return -1;
 174         }
 175
 176         gettimeofday(&tv, NULL);
 177         srandom(tv.tv_usec);
 178
 179         flower.width = 200;
 180         flower.height = 200;
 181         flower.display = d;
 182         flower.window = window_create(d);
 183         flower.widget = window_add_widget(flower.window, &flower);
 184         window_set_title(flower.window, "Flower");
 185
 186         widget_set_resize_handler(flower.widget, resize_handler);
 187         widget_set_redraw_handler(flower.widget, redraw_handler);
 188         widget_set_button_handler(flower.widget, button_handler);
 189         widget_set_default_cursor(flower.widget, CURSOR_HAND1);
 190         widget_set_touch_down_handler(flower.widget, touch_down_handler);
 191
 192         window_schedule_resize(flower.window, flower.width, flower.height);
 193
 194         display_run(d);
 195
 196         return 0;
 197 }