compositor/screenshooter.c

   1 /*
   2  * Copyright © 2008 Kristian Høgsberg
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 #include <stdlib.h>
  20 #include <GLES2/gl2.h>
  21 #include <gdk-pixbuf/gdk-pixbuf.h>
  22
  23 #include "compositor.h"
  24 #include "screenshooter-server-protocol.h"
  25
  26 struct wl_screenshooter {
  27         struct wl_object base;
  28         struct wlsc_compositor *ec;
  29 };
  30
  31 static void
  32 screenshooter_shoot(struct wl_client *client, struct wl_screenshooter *shooter)
  33 {
  34         struct wlsc_compositor *ec = shooter->ec;
  35         struct wlsc_output *output;
  36         char buffer[256];
  37         GdkPixbuf *pixbuf;
  38         GError *error = NULL;
  39         unsigned char *data;
  40         int i, j;
  41
  42         i = 0;
  43         wl_list_for_each(output, &ec->output_list, link) {
  44                 snprintf(buffer, sizeof buffer, "wayland-screenshot-%d.png", i++);
  45                 data = malloc(output->width * output->height * 4);
  46                 if (data == NULL) {
  47                         fprintf(stderr, "couldn't allocate image buffer\n");
  48                         continue;
  49                 }
  50
  51                 glPixelStorei(GL_PACK_ALIGNMENT, 1);
  52                 glReadPixels(0, 0, output->width, output->height,
  53                              GL_RGBA, GL_UNSIGNED_BYTE, data);
  54
  55                 /* FIXME: We should just use a RGB visual for the frontbuffer. */
  56                 for (j = 3; j < output->width * output->height * 4; j += 4)
  57                         data[j] = 0xff;
  58
  59                 pixbuf = gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, TRUE,
  60                                                   8, output->width, output->height, output->width * 4,
  61                                                   NULL, NULL);
  62                 gdk_pixbuf_save(pixbuf, buffer, "png", &error, NULL);
  63                 g_object_unref(pixbuf);
  64                 free(data);
  65         }
  66 }
  67
  68 struct wl_screenshooter_interface screenshooter_implementation = {
  69         screenshooter_shoot
  70 };
  71
  72 void
  73 screenshooter_create(struct wlsc_compositor *ec)
  74 {
  75         struct wl_screenshooter *shooter;
  76
  77         shooter = malloc(sizeof *shooter);
  78         if (shooter == NULL)
  79                 return;
  80
  81         shooter->base.interface = &wl_screenshooter_interface;
  82         shooter->base.implementation =
  83                 (void(**)(void)) &screenshooter_implementation;
  84         shooter->ec = ec;
  85
  86         wl_display_add_object(ec->wl_display, &shooter->base);
  87         wl_display_add_global(ec->wl_display, &shooter->base, NULL);
  88 };