Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 293 insertions, 0 deletions

diff --git a/app/widgets/gimpviewrenderer-frame.c b/app/widgets/gimpviewrenderer-frame.c
new file mode 100644
index 0000000..3abd199
--- /dev/null
+++ b/app/widgets/gimpviewrenderer-frame.c
@@ -0,0 +1,293 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpviewrenderer-frame.c
+ * Copyright (C) 2004 Sven Neumann <sven@gimp.org>
+ *
+ * Contains code taken from eel, the Eazel Extensions Library.
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "core/gimpviewable.h"
+
+#include "gimpviewrenderer.h"
+#include "gimpviewrenderer-frame.h"
+#include "gimpwidgets-utils.h"
+
+
+/* utility to stretch a frame to the desired size */
+
+static void
+draw_frame_row (GdkPixbuf *frame_image,
+                gint       target_width,
+                gint       source_width,
+                gint       source_v_position,
+                gint       dest_v_position,
+                GdkPixbuf *result_pixbuf,
+                gint       left_offset,
+                gint       height)
+{
+  gint remaining_width = target_width;
+  gint h_offset        = 0;
+
+  while (remaining_width > 0)
+    {
+      gint slab_width = (remaining_width > source_width ?
+                         source_width : remaining_width);
+      gdk_pixbuf_copy_area (frame_image,
+                            left_offset, source_v_position,
+                            slab_width, height,
+                            result_pixbuf,
+                            left_offset + h_offset, dest_v_position);
+
+      remaining_width -= slab_width;
+      h_offset += slab_width;
+    }
+}
+
+/* utility to draw the middle section of the frame in a loop */
+static void
+draw_frame_column (GdkPixbuf *frame_image,
+                   gint       target_height,
+                   gint       source_height,
+                   gint       source_h_position,
+                   gint       dest_h_position,
+                   GdkPixbuf *result_pixbuf,
+                   gint       top_offset, int width)
+{
+  gint remaining_height = target_height;
+  gint v_offset         = 0;
+
+  while (remaining_height > 0)
+    {
+      gint slab_height = (remaining_height > source_height ?
+                          source_height : remaining_height);
+
+      gdk_pixbuf_copy_area (frame_image,
+                            source_h_position, top_offset,
+                            width, slab_height,
+                            result_pixbuf,
+                            dest_h_position, top_offset + v_offset);
+
+      remaining_height -= slab_height;
+      v_offset += slab_height;
+    }
+}
+
+static GdkPixbuf *
+stretch_frame_image (GdkPixbuf *frame_image,
+                     gint       left_offset,
+                     gint       top_offset,
+                     gint       right_offset,
+                     gint       bottom_offset,
+                     gint       dest_width,
+                     gint       dest_height)
+{
+  GdkPixbuf *pixbuf;
+  gint       frame_width, frame_height;
+  gint       target_width,  target_frame_width;
+  gint       target_height, target_frame_height;
+
+  frame_width  = gdk_pixbuf_get_width  (frame_image);
+  frame_height = gdk_pixbuf_get_height (frame_image );
+
+  pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
+                           dest_width, dest_height);
+  gdk_pixbuf_fill (pixbuf, 0);
+
+  target_width  = dest_width - left_offset - right_offset;
+  target_height = dest_height - top_offset - bottom_offset;
+
+  target_frame_width  = frame_width - left_offset - right_offset;
+  target_frame_height = frame_height - top_offset - bottom_offset;
+
+  left_offset   += MIN (target_width / 4, target_frame_width / 4);
+  right_offset  += MIN (target_width / 4, target_frame_width / 4);
+  top_offset    += MIN (target_height / 4, target_frame_height / 4);
+  bottom_offset += MIN (target_height / 4, target_frame_height / 4);
+
+  target_width  = dest_width - left_offset - right_offset;
+  target_height = dest_height - top_offset - bottom_offset;
+
+  target_frame_width  = frame_width - left_offset - right_offset;
+  target_frame_height = frame_height - top_offset - bottom_offset;
+
+  /* draw the left top corner  and top row */
+  gdk_pixbuf_copy_area (frame_image,
+                        0, 0, left_offset, top_offset,
+                        pixbuf, 0,  0);
+  draw_frame_row (frame_image, target_width, target_frame_width,
+                  0, 0,
+                  pixbuf,
+                  left_offset, top_offset);
+
+  /* draw the right top corner and left column */
+  gdk_pixbuf_copy_area (frame_image,
+                        frame_width - right_offset, 0,
+                        right_offset, top_offset,
+
+                        pixbuf,
+                        dest_width - right_offset,  0);
+  draw_frame_column (frame_image, target_height, target_frame_height, 0, 0,
+                     pixbuf, top_offset, left_offset);
+
+  /* draw the bottom right corner and bottom row */
+  gdk_pixbuf_copy_area (frame_image,
+                        frame_width - right_offset, frame_height - bottom_offset,
+                        right_offset, bottom_offset,
+                        pixbuf,
+                        dest_width - right_offset, dest_height - bottom_offset);
+  draw_frame_row (frame_image, target_width, target_frame_width,
+                  frame_height - bottom_offset, dest_height - bottom_offset,
+                  pixbuf, left_offset, bottom_offset);
+
+  /* draw the bottom left corner and the right column */
+  gdk_pixbuf_copy_area (frame_image,
+                        0, frame_height - bottom_offset,
+                        left_offset, bottom_offset,
+                        pixbuf,
+                        0,  dest_height - bottom_offset);
+  draw_frame_column (frame_image, target_height, target_frame_height,
+                     frame_width - right_offset, dest_width - right_offset,
+                     pixbuf, top_offset, right_offset);
+
+  return pixbuf;
+}
+
+static GdkPixbuf *
+gimp_view_renderer_get_frame (GimpViewRenderer *renderer,
+                              gint              width,
+                              gint              height)
+{
+  GimpViewRendererClass *class = GIMP_VIEW_RENDERER_GET_CLASS (renderer);
+
+  return stretch_frame_image (class->frame,
+                              class->frame_left,
+                              class->frame_top,
+                              class->frame_right,
+                              class->frame_bottom,
+                              width, height);
+}
+
+static void
+gimp_view_renderer_ensure_frame (GimpViewRenderer *renderer,
+                                 GtkWidget        *widget)
+{
+  GimpViewRendererClass *class = GIMP_VIEW_RENDERER_GET_CLASS (renderer);
+
+  if (! class->frame)
+    {
+      class->frame = gimp_widget_load_icon (widget, GIMP_ICON_FRAME, 48);
+
+      /*  FIXME: shouldn't be hardcoded  */
+      class->frame_left   = 2;
+      class->frame_top    = 2;
+      class->frame_right  = 4;
+      class->frame_bottom = 4;
+    }
+}
+
+GdkPixbuf *
+gimp_view_renderer_get_frame_pixbuf (GimpViewRenderer *renderer,
+                                     GtkWidget        *widget,
+                                     gint              width,
+                                     gint              height)
+{
+  GimpViewRendererClass *class;
+  GdkPixbuf             *frame;
+  GdkPixbuf             *pixbuf;
+  gint                   w, h;
+  gint                   x, y;
+
+  g_return_val_if_fail (GIMP_IS_VIEW_RENDERER (renderer), NULL);
+  g_return_val_if_fail (GIMP_IS_VIEWABLE (renderer->viewable), NULL);
+
+  gimp_view_renderer_ensure_frame (renderer, widget);
+
+  class = GIMP_VIEW_RENDERER_GET_CLASS (renderer);
+
+  w = width  - class->frame_left - class->frame_right;
+  h = height - class->frame_top  - class->frame_bottom;
+
+  if (w > 12 && h > 12)
+    {
+      pixbuf = gimp_viewable_get_pixbuf (renderer->viewable,
+                                         renderer->context,
+                                         w, h);
+      if (!pixbuf)
+        return NULL;
+
+      x = class->frame_left;
+      y = class->frame_top;
+      w = gdk_pixbuf_get_width (pixbuf);
+      h = gdk_pixbuf_get_height (pixbuf);
+
+      frame  = gimp_view_renderer_get_frame (renderer,
+                                             w + x + class->frame_right,
+                                             h + y + class->frame_bottom);
+    }
+  else
+    {
+      pixbuf = gimp_viewable_get_pixbuf (renderer->viewable,
+                                         renderer->context,
+                                         width - 2, height - 2);
+      if (!pixbuf)
+        return NULL;
+
+      /*  as fallback, render the preview with a 1 pixel wide black border  */
+
+      x = 1;
+      y = 1;
+      w = gdk_pixbuf_get_width (pixbuf);
+      h = gdk_pixbuf_get_height (pixbuf);
+
+      frame = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, w + 2, h + 2);
+      gdk_pixbuf_fill (frame, 0);
+     }
+
+  gdk_pixbuf_copy_area (pixbuf, 0, 0, w, h, frame, x, y);
+
+  return frame;
+}
+
+
+/* This API is somewhat weird but GimpThumbBox needs these values so
+ * it can request the GimpImageFile view in the proper size.
+ */
+void
+gimp_view_renderer_get_frame_size (gint *horizontal,
+                                   gint *vertical)
+{
+  GimpViewRendererClass *class;
+
+  class = g_type_class_ref (GIMP_TYPE_VIEW_RENDERER);
+
+  if (horizontal)
+    *horizontal = class->frame_left + class->frame_right;
+
+  if (vertical)
+    *vertical = class->frame_top + class->frame_bottom;
+
+  g_type_class_unref (class);
+}