gimpviewrendererbuffer.c 3.46 KB
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/* GIMP - The GNU Image Manipulation Program
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 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * gimpviewrendererbuffer.c
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 * Copyright (C) 2004-2006 Michael Natterer <mitch@gimp.org>
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 *
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 * This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 3 of the License, or
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 * (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
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 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
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 */

#include "config.h"

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#include <gegl.h>
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#include <gtk/gtk.h>

#include "libgimpwidgets/gimpwidgets.h"

#include "widgets-types.h"

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#include "core/gimptempbuf.h"
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#include "core/gimpviewable.h"

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#include "gimpviewrendererbuffer.h"


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static void   gimp_view_renderer_buffer_render (GimpViewRenderer *renderer,
                                                GtkWidget        *widget);
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G_DEFINE_TYPE (GimpViewRendererBuffer, gimp_view_renderer_buffer,
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               GIMP_TYPE_VIEW_RENDERER)
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#define parent_class gimp_view_renderer_buffer_class_init
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static void
gimp_view_renderer_buffer_class_init (GimpViewRendererBufferClass *klass)
{
  GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);

  renderer_class->render = gimp_view_renderer_buffer_render;
}

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static void
gimp_view_renderer_buffer_init (GimpViewRendererBuffer *renderer)
{
}

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static void
gimp_view_renderer_buffer_render (GimpViewRenderer *renderer,
                                  GtkWidget        *widget)
{
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  gint         buffer_width;
  gint         buffer_height;
  gint         view_width;
  gint         view_height;
  gboolean     scaling_up;
  GimpTempBuf *render_buf = NULL;
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  gimp_viewable_get_size (renderer->viewable, &buffer_width, &buffer_height);
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  gimp_viewable_calc_preview_size (buffer_width,
                                   buffer_height,
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                                   renderer->width,
                                   renderer->height,
                                   TRUE, 1.0, 1.0,
                                   &view_width,
                                   &view_height,
                                   &scaling_up);

  if (scaling_up)
    {
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      GimpTempBuf *temp_buf;
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      temp_buf = gimp_viewable_get_new_preview (renderer->viewable,
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                                                renderer->context,
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                                                buffer_width, buffer_height);
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      if (temp_buf)
        {
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          render_buf = gimp_temp_buf_scale (temp_buf, view_width, view_height);
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          gimp_temp_buf_unref (temp_buf);
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        }
    }
  else
    {
      render_buf = gimp_viewable_get_new_preview (renderer->viewable,
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                                                  renderer->context,
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                                                  view_width, view_height);
    }

  if (render_buf)
    {
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      gimp_view_renderer_render_temp_buf_simple (renderer, widget, render_buf);
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      gimp_temp_buf_unref (render_buf);
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    }
  else /* no preview available */
    {
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      const gchar *icon_name;
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      icon_name = gimp_viewable_get_icon_name (renderer->viewable);
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      gimp_view_renderer_render_icon (renderer, widget, icon_name);
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    }
}