1 files changed, 360 insertions, 0 deletions
diff --git a/grub-core/gfxmenu/widget-box.c b/grub-core/gfxmenu/widget-box.c
new file mode 100644
index 0000000..470597d
--- /dev/null
+++ b/grub-core/gfxmenu/widget-box.c
@@ -0,0 +1,360 @@
+/* widget_box.c - Pixmap-stylized box widget. */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2008,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/video.h>
+#include <grub/bitmap.h>
+#include <grub/bitmap_scale.h>
+#include <grub/gfxwidgets.h>
+
+enum box_pixmaps
+{
+  BOX_PIXMAP_NW, BOX_PIXMAP_NE, BOX_PIXMAP_SE, BOX_PIXMAP_SW,
+  BOX_PIXMAP_N, BOX_PIXMAP_E, BOX_PIXMAP_S, BOX_PIXMAP_W,
+  BOX_PIXMAP_CENTER
+};
+
+static const char *box_pixmap_names[] = {
+  /* Corners: */
+  "nw", "ne", "se", "sw",
+  /* Sides: */
+  "n", "e", "s", "w",
+  /* Center: */
+  "c"
+};
+
+#define BOX_NUM_PIXMAPS (sizeof(box_pixmap_names)/sizeof(*box_pixmap_names))
+
+static int
+get_height (struct grub_video_bitmap *bitmap)
+{
+  if (bitmap)
+    return grub_video_bitmap_get_height (bitmap);
+  else
+    return 0;
+}
+
+static int
+get_width (struct grub_video_bitmap *bitmap)
+{
+  if (bitmap)
+    return grub_video_bitmap_get_width (bitmap);
+  else
+    return 0;
+}
+
+static void
+blit (grub_gfxmenu_box_t self, int pixmap_index, int x, int y)
+{
+  struct grub_video_bitmap *bitmap;
+  bitmap = self->scaled_pixmaps[pixmap_index];
+  if (! bitmap)
+    return;
+  grub_video_blit_bitmap (bitmap, GRUB_VIDEO_BLIT_BLEND,
+                          x, y, 0, 0,
+                          grub_video_bitmap_get_width (bitmap),
+                          grub_video_bitmap_get_height (bitmap));
+}
+
+static void
+draw (grub_gfxmenu_box_t self, int x, int y)
+{
+  int height_n;
+  int width_w;
+  int tmp;
+
+  /* Count maximum height of NW, N, NE.  */
+  height_n = get_height (self->scaled_pixmaps[BOX_PIXMAP_NW]);
+  tmp = get_height (self->scaled_pixmaps[BOX_PIXMAP_N]);
+  if (tmp > height_n)
+    height_n = tmp;
+  tmp = get_height (self->scaled_pixmaps[BOX_PIXMAP_NE]);
+  if (tmp > height_n)
+    height_n = tmp;
+
+  /* Count maximum width of NW, W, SW.  */
+  width_w = get_width (self->scaled_pixmaps[BOX_PIXMAP_NW]);
+  tmp = get_width (self->scaled_pixmaps[BOX_PIXMAP_W]);
+  if (tmp > width_w)
+    width_w = tmp;
+  tmp = get_width (self->scaled_pixmaps[BOX_PIXMAP_SW]);
+  if (tmp > width_w)
+    width_w = tmp;
+
+  /* Draw sides.  */
+  blit (self, BOX_PIXMAP_N, x + width_w, y);
+  blit (self, BOX_PIXMAP_S, x + width_w, y + height_n + self->content_height);
+  blit (self, BOX_PIXMAP_E, x + width_w + self->content_width, y + height_n);
+  blit (self, BOX_PIXMAP_W, x, y + height_n);
+
+  /* Draw corners.  */
+  blit (self, BOX_PIXMAP_NW, x, y);
+  blit (self, BOX_PIXMAP_NE, x + width_w + self->content_width, y);
+  blit (self, BOX_PIXMAP_SE,
+        x + width_w + self->content_width,
+        y + height_n + self->content_height);
+  blit (self, BOX_PIXMAP_SW, x, y + height_n + self->content_height);
+
+  /* Draw center.  */
+  blit (self, BOX_PIXMAP_CENTER, x + width_w, y + height_n);
+}
+
+static grub_err_t
+scale_pixmap (grub_gfxmenu_box_t self, int i, int w, int h)
+{
+  struct grub_video_bitmap **scaled = &self->scaled_pixmaps[i];
+  struct grub_video_bitmap *raw = self->raw_pixmaps[i];
+
+  if (raw == 0)
+    return grub_errno;
+
+  if (w == -1)
+    w = grub_video_bitmap_get_width (raw);
+  if (h == -1)
+    h = grub_video_bitmap_get_height (raw);
+
+  if (*scaled == 0
+      || ((int) grub_video_bitmap_get_width (*scaled) != w)
+      || ((int) grub_video_bitmap_get_height (*scaled) != h))
+    {
+      if (*scaled)
+        {
+          grub_video_bitmap_destroy (*scaled);
+          *scaled = 0;
+        }
+
+      /* Don't try to create a bitmap with a zero dimension.  */
+      if (w != 0 && h != 0)
+        grub_video_bitmap_create_scaled (scaled, w, h, raw,
+                                         GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST);
+    }
+
+  return grub_errno;
+}
+
+static void
+set_content_size (grub_gfxmenu_box_t self,
+                  int width, int height)
+{
+  self->content_width = width;
+  self->content_height = height;
+
+  /* Resize sides to match the width and height.  */
+  /* It is assumed that the corners width/height match the adjacent sides.  */
+
+  /* Resize N and S sides to match width.  */
+  if (scale_pixmap(self, BOX_PIXMAP_N, width, -1) != GRUB_ERR_NONE)
+    return;
+  if (scale_pixmap(self, BOX_PIXMAP_S, width, -1) != GRUB_ERR_NONE)
+    return;
+
+  /* Resize E and W sides to match height.  */
+  if (scale_pixmap(self, BOX_PIXMAP_E, -1, height) != GRUB_ERR_NONE)
+      return;
+  if (scale_pixmap(self, BOX_PIXMAP_W, -1, height) != GRUB_ERR_NONE)
+    return;
+
+  /* Don't scale the corners--they are assumed to match the sides. */
+  if (scale_pixmap(self, BOX_PIXMAP_NW, -1, -1) != GRUB_ERR_NONE)
+    return;
+  if (scale_pixmap(self, BOX_PIXMAP_SW, -1, -1) != GRUB_ERR_NONE)
+    return;
+  if (scale_pixmap(self, BOX_PIXMAP_NE, -1, -1) != GRUB_ERR_NONE)
+    return;
+  if (scale_pixmap(self, BOX_PIXMAP_SE, -1, -1) != GRUB_ERR_NONE)
+    return;
+
+  /* Scale the center area. */
+  if (scale_pixmap(self, BOX_PIXMAP_CENTER, width, height) != GRUB_ERR_NONE)
+    return;
+}
+
+static int
+get_border_width (grub_gfxmenu_box_t self)
+{
+  return (get_width (self->raw_pixmaps[BOX_PIXMAP_E])
+	  + get_width (self->raw_pixmaps[BOX_PIXMAP_W]));
+}
+
+static int
+get_left_pad (grub_gfxmenu_box_t self)
+{
+  int v, c;
+
+  v = get_width (self->raw_pixmaps[BOX_PIXMAP_W]);
+  c = get_width (self->raw_pixmaps[BOX_PIXMAP_NW]);
+  if (c > v)
+    v = c;
+  c = get_width (self->raw_pixmaps[BOX_PIXMAP_SW]);
+  if (c > v)
+    v = c;
+
+  return v;
+}
+
+static int
+get_top_pad (grub_gfxmenu_box_t self)
+{
+  int v, c;
+
+  v = get_height (self->raw_pixmaps[BOX_PIXMAP_N]);
+  c = get_height (self->raw_pixmaps[BOX_PIXMAP_NW]);
+  if (c > v)
+    v = c;
+  c = get_height (self->raw_pixmaps[BOX_PIXMAP_NE]);
+  if (c > v)
+    v = c;
+
+  return v;
+}
+
+static int
+get_right_pad (grub_gfxmenu_box_t self)
+{
+  int v, c;
+
+  v = get_width (self->raw_pixmaps[BOX_PIXMAP_E]);
+  c = get_width (self->raw_pixmaps[BOX_PIXMAP_NE]);
+  if (c > v)
+    v = c;
+  c = get_width (self->raw_pixmaps[BOX_PIXMAP_SE]);
+  if (c > v)
+    v = c;
+
+  return v;
+}
+
+static int
+get_bottom_pad (grub_gfxmenu_box_t self)
+{
+  int v, c;
+
+  v = get_height (self->raw_pixmaps[BOX_PIXMAP_S]);
+  c = get_height (self->raw_pixmaps[BOX_PIXMAP_SW]);
+  if (c > v)
+    v = c;
+  c = get_height (self->raw_pixmaps[BOX_PIXMAP_SE]);
+  if (c > v)
+    v = c;
+
+  return v;
+}
+
+static void
+destroy (grub_gfxmenu_box_t self)
+{
+  unsigned i;
+  for (i = 0; i < BOX_NUM_PIXMAPS; i++)
+    {
+      if (self->raw_pixmaps[i])
+        grub_video_bitmap_destroy(self->raw_pixmaps[i]);
+      self->raw_pixmaps[i] = 0;
+
+      if (self->scaled_pixmaps[i])
+        grub_video_bitmap_destroy(self->scaled_pixmaps[i]);
+      self->scaled_pixmaps[i] = 0;
+    }
+  grub_free (self->raw_pixmaps);
+  self->raw_pixmaps = 0;
+  grub_free (self->scaled_pixmaps);
+  self->scaled_pixmaps = 0;
+
+  /* Free self:  must be the last step!  */
+  grub_free (self);
+}
+
+
+/* Create a new box.  If PIXMAPS_PREFIX and PIXMAPS_SUFFIX are both non-null,
+   then an attempt is made to load the north, south, east, west, northwest,
+   northeast, southeast, southwest, and center pixmaps.
+   If either PIXMAPS_PREFIX or PIXMAPS_SUFFIX is 0, then no pixmaps are
+   loaded, and the box has zero-width borders and is drawn transparent.  */
+grub_gfxmenu_box_t
+grub_gfxmenu_create_box (const char *pixmaps_prefix,
+                         const char *pixmaps_suffix)
+{
+  unsigned i;
+  grub_gfxmenu_box_t box;
+
+  box = (grub_gfxmenu_box_t) grub_malloc (sizeof (*box));
+  if (! box)
+    return 0;
+
+  box->content_width = 0;
+  box->content_height = 0;
+  box->raw_pixmaps =
+    (struct grub_video_bitmap **)
+    grub_calloc (BOX_NUM_PIXMAPS, sizeof (struct grub_video_bitmap *));
+  box->scaled_pixmaps =
+    (struct grub_video_bitmap **)
+    grub_calloc (BOX_NUM_PIXMAPS, sizeof (struct grub_video_bitmap *));
+
+  /* Initialize all pixmap pointers to NULL so that proper destruction can
+     be performed if an error is encountered partway through construction.  */
+  for (i = 0; i < BOX_NUM_PIXMAPS; i++)
+      box->raw_pixmaps[i] = 0;
+  for (i = 0; i < BOX_NUM_PIXMAPS; i++)
+      box->scaled_pixmaps[i] = 0;
+
+  /* Load the pixmaps.  */
+  for (i = 0; i < BOX_NUM_PIXMAPS; i++)
+    {
+      if (pixmaps_prefix && pixmaps_suffix)
+        {
+          char *path;
+          char *path_end;
+
+          path = grub_malloc (grub_strlen (pixmaps_prefix)
+                              + grub_strlen (box_pixmap_names[i])
+                              + grub_strlen (pixmaps_suffix)
+                              + 1);
+          if (! path)
+            goto fail_and_destroy;
+
+          /* Construct the specific path for this pixmap.  */
+          path_end = grub_stpcpy (path, pixmaps_prefix);
+          path_end = grub_stpcpy (path_end, box_pixmap_names[i]);
+          path_end = grub_stpcpy (path_end, pixmaps_suffix);
+
+          grub_video_bitmap_load (&box->raw_pixmaps[i], path);
+          grub_free (path);
+
+          /* Ignore missing pixmaps.  */
+          grub_errno = GRUB_ERR_NONE;
+        }
+    }
+
+  box->draw = draw;
+  box->set_content_size = set_content_size;
+  box->get_border_width = get_border_width;
+
+  box->get_left_pad = get_left_pad;
+  box->get_top_pad = get_top_pad;
+  box->get_right_pad = get_right_pad;
+  box->get_bottom_pad = get_bottom_pad;
+  box->destroy = destroy;
+  return box;
+
+fail_and_destroy:
+  destroy (box);
+  return 0;
+}