app/widgets/Makefile.am app/widgets/widgets-types.h added a view renderer

2004-09-14 Michael Natterer <mitch@gimp.org> * app/widgets/Makefile.am * app/widgets/widgets-types.h * app/widgets/gimpviewrendererbuffer.[ch]: added a view renderer which knows how to preserve a GimpBuffer's aspect ratio if the view's aspect ratio is different. * app/widgets/gimpviewrenderer-utils.c (gimp_view_renderer_type_from_viewable_type): use it for viewables of type GimpBuffer. Fixes bug #152531
2004-09-14 12:06:28 +00:00
parent 6d02719401
commit c450ca1858
6 changed files with 212 additions and 0 deletions
--- a/app/widgets/gimpviewrendererbuffer.c
+++ b/app/widgets/gimpviewrendererbuffer.c
@ -0,0 +1,140 @@
+/* The GIMP -- an image manipulation program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpviewrendererbuffer.c
+ * Copyright (C) 2004 Michael Natterer <mitch@gimp.org>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "base/temp-buf.h"
+
+#include "core/gimpbuffer.h"
+
+#include "gimpviewrendererbuffer.h"
+
+
+static void   gimp_view_renderer_buffer_class_init (GimpViewRendererBufferClass *klass);
+
+static void   gimp_view_renderer_buffer_render     (GimpViewRenderer *renderer,
+                                                    GtkWidget        *widget);
+
+
+static GimpViewRendererClass *parent_class = NULL;
+
+
+GType
+gimp_view_renderer_buffer_get_type (void)
+{
+  static GType renderer_type = 0;
+
+  if (! renderer_type)
+    {
+      static const GTypeInfo renderer_info =
+      {
+        sizeof (GimpViewRendererBufferClass),
+        NULL,           /* base_init */
+        NULL,           /* base_finalize */
+        (GClassInitFunc) gimp_view_renderer_buffer_class_init,
+        NULL,           /* class_finalize */
+        NULL,           /* class_data */
+        sizeof (GimpViewRendererBuffer),
+        0,              /* n_preallocs */
+        NULL            /* instance_init */
+      };
+
+      renderer_type = g_type_register_static (GIMP_TYPE_VIEW_RENDERER,
+                                              "GimpViewRendererBuffer",
+                                              &renderer_info, 0);
+    }
+
+  return renderer_type;
+}
+
+static void
+gimp_view_renderer_buffer_class_init (GimpViewRendererBufferClass *klass)
+{
+  GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  renderer_class->render = gimp_view_renderer_buffer_render;
+}
+
+static void
+gimp_view_renderer_buffer_render (GimpViewRenderer *renderer,
+                                  GtkWidget        *widget)
+{
+  GimpBuffer *buffer;
+  gint        view_width;
+  gint        view_height;
+  gboolean    scaling_up;
+  TempBuf    *render_buf = NULL;
+
+  buffer = GIMP_BUFFER (renderer->viewable);
+
+  gimp_viewable_calc_preview_size (gimp_buffer_get_width (buffer),
+                                   gimp_buffer_get_height (buffer),
+                                   renderer->width,
+                                   renderer->height,
+                                   TRUE, 1.0, 1.0,
+                                   &view_width,
+                                   &view_height,
+                                   &scaling_up);
+
+  if (scaling_up)
+    {
+      TempBuf *temp_buf;
+
+      temp_buf = gimp_viewable_get_new_preview (renderer->viewable,
+                                                gimp_buffer_get_width (buffer),
+                                                gimp_buffer_get_height (buffer));
+
+      if (temp_buf)
+        {
+          render_buf = temp_buf_scale (temp_buf, view_width, view_height);
+
+          temp_buf_free (temp_buf);
+        }
+    }
+  else
+    {
+      render_buf = gimp_viewable_get_new_preview (renderer->viewable,
+                                                  view_width, view_height);
+    }
+
+  if (render_buf)
+    {
+      gimp_view_renderer_default_render_buffer (renderer, widget, render_buf);
+
+      temp_buf_free (render_buf);
+    }
+  else /* no preview available */
+    {
+      const gchar  *stock_id;
+
+      stock_id = gimp_viewable_get_stock_id (renderer->viewable);
+
+      gimp_view_renderer_default_render_stock (renderer, widget, stock_id);
+    }
+}