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
  21 #include "compositor.h"
  22 #include "screenshooter-server-protocol.h"
  23
  24 struct screenshooter {
  25         struct wl_object base;
  26         struct wlsc_compositor *ec;
  27 };
  28
  29 static void
  30 screenshooter_shoot(struct wl_client *client,
  31                     struct screenshooter *shooter,
  32                     struct wl_output *output_base, struct wl_buffer *buffer)
  33 {
  34         struct wlsc_output *output = (struct wlsc_output *) output_base;
  35
  36         if (!wl_buffer_is_shm(buffer))
  37                 return;
  38
  39         if (buffer->width < output->current->width ||
  40             buffer->height < output->current->height)
  41                 return;
  42
  43         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  44         glReadPixels(0, 0, output->current->width, output->current->height,
  45                      GL_RGBA, GL_UNSIGNED_BYTE,
  46                      wl_shm_buffer_get_data(buffer));
  47 }
  48
  49 struct screenshooter_interface screenshooter_implementation = {
  50         screenshooter_shoot
  51 };
  52
  53 void
  54 screenshooter_create(struct wlsc_compositor *ec)
  55 {
  56         struct screenshooter *shooter;
  57
  58         shooter = malloc(sizeof *shooter);
  59         if (shooter == NULL)
  60                 return;
  61
  62         shooter->base.interface = &screenshooter_interface;
  63         shooter->base.implementation =
  64                 (void(**)(void)) &screenshooter_implementation;
  65         shooter->ec = ec;
  66
  67         wl_display_add_object(ec->wl_display, &shooter->base);
  68         wl_display_add_global(ec->wl_display, &shooter->base, NULL);
  69 };