arch/all-pc/boot/grub2-aros/grub-core/term/gfxterm_background.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2006,2007,2008,2009,2013  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/term.h>
  20 #include <grub/types.h>
  21 #include <grub/dl.h>
  22 #include <grub/misc.h>
  23 #include <grub/font.h>
  24 #include <grub/mm.h>
  25 #include <grub/env.h>
  26 #include <grub/video.h>
  27 #include <grub/gfxterm.h>
  28 #include <grub/bitmap.h>
  29 #include <grub/command.h>
  30 #include <grub/extcmd.h>
  31 #include <grub/bitmap_scale.h>
  32 #include <grub/i18n.h>
  33 #include <grub/color.h>
  34
  35 GRUB_MOD_LICENSE ("GPLv3+");
  36
  37 /* Option array indices.  */
  38 enum
  39   {
  40     BACKGROUND_CMD_ARGINDEX_MODE = 0
  41   };
  42
  43 static const struct grub_arg_option background_image_cmd_options[] =
  44   {
  45     {"mode", 'm', 0, N_("Background image mode."),
  46     /* TRANSLATORS: This refers to background image mode (stretched or
  47        in left-top corner). Note that GRUB will accept only original
  48        keywords stretch and normal, not the translated ones.
  49        So please put both in translation
  50        e.g. stretch(=%STRETCH%)|normal(=%NORMAL%).
  51        The percents mark the translated version. Since many people
  52        may not know the word stretch or normal I recommend
  53        putting the translation either here or in "Background image mode."
  54        string.  */
  55      N_("stretch|normal"),
  56      ARG_TYPE_STRING},
  57     {0, 0, 0, 0, 0, 0}
  58   };
  59
  60 static grub_err_t
  61 grub_gfxterm_background_image_cmd (grub_extcmd_context_t ctxt,
  62                                    int argc, char **args)
  63 {
  64   struct grub_arg_list *state = ctxt->state;
  65
  66   /* Check that we have video adapter active.  */
  67   if (grub_video_get_info(NULL) != GRUB_ERR_NONE)
  68     return grub_errno;
  69
  70   /* Destroy existing background bitmap if loaded.  */
  71   if (grub_gfxterm_background.bitmap)
  72     {
  73       grub_video_bitmap_destroy (grub_gfxterm_background.bitmap);
  74       grub_gfxterm_background.bitmap = 0;
  75       grub_gfxterm_background.blend_text_bg = 0;
  76
  77       /* Mark whole screen as dirty.  */
  78       grub_gfxterm_schedule_repaint ();
  79     }
  80
  81   /* If filename was provided, try to load that.  */
  82   if (argc >= 1)
  83     {
  84       /* Try to load new one.  */
  85       grub_video_bitmap_load (&grub_gfxterm_background.bitmap, args[0]);
  86       if (grub_errno != GRUB_ERR_NONE)
  87         return grub_errno;
  88
  89       /* Determine if the bitmap should be scaled to fit the screen.  */
  90       if (!state[BACKGROUND_CMD_ARGINDEX_MODE].set
  91           || grub_strcmp (state[BACKGROUND_CMD_ARGINDEX_MODE].arg,
  92                           "stretch") == 0)
  93           {
  94             unsigned int width, height;
  95             grub_gfxterm_get_dimensions (&width, &height);
  96             if (width
  97                 != grub_video_bitmap_get_width (grub_gfxterm_background.bitmap)
  98                 || height
  99                 != grub_video_bitmap_get_height (grub_gfxterm_background.bitmap))
 100               {
 101                 struct grub_video_bitmap *scaled_bitmap;
 102                 grub_video_bitmap_create_scaled (&scaled_bitmap,
 103                                                  width,
 104                                                  height,
 105                                                  grub_gfxterm_background.bitmap,
 106                                                  GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST);
 107                 if (grub_errno == GRUB_ERR_NONE)
 108                   {
 109                     /* Replace the original bitmap with the scaled one.  */
 110                     grub_video_bitmap_destroy (grub_gfxterm_background.bitmap);
 111                     grub_gfxterm_background.bitmap = scaled_bitmap;
 112                   }
 113               }
 114           }
 115
 116       /* If bitmap was loaded correctly, display it.  */
 117       if (grub_gfxterm_background.bitmap)
 118         {
 119           grub_gfxterm_background.blend_text_bg = 1;
 120
 121           /* Mark whole screen as dirty.  */
 122           grub_gfxterm_schedule_repaint ();
 123         }
 124     }
 125
 126   /* All was ok.  */
 127   grub_errno = GRUB_ERR_NONE;
 128   return grub_errno;
 129 }
 130
 131 static grub_err_t
 132 grub_gfxterm_background_color_cmd (grub_command_t cmd __attribute__ ((unused)),
 133                                    int argc, char **args)
 134 {
 135   if (argc != 1)
 136     return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
 137
 138   /* Check that we have video adapter active.  */
 139   if (grub_video_get_info (NULL) != GRUB_ERR_NONE)
 140     return grub_errno;
 141
 142   if (grub_video_parse_color (args[0],
 143                               &grub_gfxterm_background.default_bg_color)
 144       != GRUB_ERR_NONE)
 145     return grub_errno;
 146
 147   /* Destroy existing background bitmap if loaded.  */
 148   if (grub_gfxterm_background.bitmap)
 149     {
 150       grub_video_bitmap_destroy (grub_gfxterm_background.bitmap);
 151       grub_gfxterm_background.bitmap = 0;
 152
 153       /* Mark whole screen as dirty.  */
 154       grub_gfxterm_schedule_repaint ();
 155     }
 156
 157   /* Set the background and border colors.  The background color needs to be
 158      compatible with the text layer.  */
 159   grub_gfxterm_video_update_color ();
 160   grub_gfxterm_background.blend_text_bg = 1;
 161
 162   /* Mark whole screen as dirty.  */
 163   grub_gfxterm_schedule_repaint ();
 164
 165   return GRUB_ERR_NONE;
 166 }
 167
 168 static grub_extcmd_t background_image_cmd_handle;
 169 static grub_command_t background_color_cmd_handle;
 170
 171 GRUB_MOD_INIT(gfxterm_background)
 172 {
 173   background_image_cmd_handle =
 174     grub_register_extcmd ("background_image",
 175                           grub_gfxterm_background_image_cmd, 0,
 176                           N_("[-m (stretch|normal)] FILE"),
 177                           N_("Load background image for active terminal."),
 178                           background_image_cmd_options);
 179   background_color_cmd_handle =
 180     grub_register_command ("background_color",
 181                            grub_gfxterm_background_color_cmd,
 182                            N_("COLOR"),
 183                            N_("Set background color for active terminal."));
 184 }
 185
 186 GRUB_MOD_FINI(gfxterm_background)
 187 {
 188   grub_unregister_command (background_color_cmd_handle);
 189   grub_unregister_extcmd (background_image_cmd_handle);
 190 }