gimp/app/widgets/gimppreviewrendererdrawable.c

208 lines
6.5 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimppreviewrendererdrawable.c
* Copyright (C) 2003 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 "libgimpmath/gimpmath.h"
#include "widgets-types.h"
#include "base/temp-buf.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "gimppreviewrendererdrawable.h"
static void gimp_preview_renderer_drawable_class_init (GimpPreviewRendererDrawableClass *klass);
static void gimp_preview_renderer_drawable_init (GimpPreviewRendererDrawable *renderer);
static void gimp_preview_renderer_drawable_render (GimpPreviewRenderer *renderer,
GtkWidget *widget);
static GimpPreviewRendererClass *parent_class = NULL;
GType
gimp_preview_renderer_drawable_get_type (void)
{
static GType renderer_type = 0;
if (! renderer_type)
{
static const GTypeInfo renderer_info =
{
sizeof (GimpPreviewRendererDrawableClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gimp_preview_renderer_drawable_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpPreviewRendererDrawable),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_preview_renderer_drawable_init,
};
renderer_type = g_type_register_static (GIMP_TYPE_PREVIEW_RENDERER,
"GimpPreviewRendererDrawable",
&renderer_info, 0);
}
return renderer_type;
}
static void
gimp_preview_renderer_drawable_class_init (GimpPreviewRendererDrawableClass *klass)
{
GimpPreviewRendererClass *renderer_class;
renderer_class = GIMP_PREVIEW_RENDERER_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
renderer_class->render = gimp_preview_renderer_drawable_render;
}
static void
gimp_preview_renderer_drawable_init (GimpPreviewRendererDrawable *renderer)
{
}
static void
gimp_preview_renderer_drawable_render (GimpPreviewRenderer *renderer,
GtkWidget *widget)
{
GimpDrawable *drawable;
GimpItem *item;
GimpImage *gimage;
gint width;
gint height;
gint preview_width;
gint preview_height;
gboolean scaling_up;
TempBuf *render_buf = NULL;
drawable = GIMP_DRAWABLE (renderer->viewable);
item = GIMP_ITEM (drawable);
gimage = gimp_item_get_image (item);
width = renderer->width;
height = renderer->height;
if (gimage && ! renderer->is_popup)
{
width = MAX (1, ROUND ((((gdouble) width / (gdouble) gimage->width) *
(gdouble) item->width)));
height = MAX (1, ROUND ((((gdouble) height / (gdouble) gimage->height) *
(gdouble) item->height)));
gimp_viewable_calc_preview_size (renderer->viewable,
item->width,
item->height,
width,
height,
renderer->dot_for_dot,
gimage->xresolution,
gimage->yresolution,
&preview_width,
&preview_height,
&scaling_up);
}
else
{
gimp_viewable_calc_preview_size (renderer->viewable,
item->width,
item->height,
width,
height,
renderer->dot_for_dot,
gimage ? gimage->xresolution : 1.0,
gimage ? gimage->yresolution : 1.0,
&preview_width,
&preview_height,
&scaling_up);
}
if (scaling_up)
{
TempBuf *temp_buf;
temp_buf = gimp_viewable_get_new_preview (renderer->viewable,
item->width,
item->height);
if (temp_buf)
{
render_buf = temp_buf_scale (temp_buf, preview_width, preview_height);
temp_buf_free (temp_buf);
}
}
else
{
render_buf = gimp_viewable_get_new_preview (renderer->viewable,
preview_width,
preview_height);
}
if (render_buf)
{
if (gimage && ! renderer->is_popup)
{
if (item->offset_x != 0)
render_buf->x =
ROUND ((((gdouble) renderer->width / (gdouble) gimage->width) *
(gdouble) item->offset_x));
if (item->offset_y != 0)
render_buf->y =
ROUND ((((gdouble) renderer->height / (gdouble) gimage->height) *
(gdouble) item->offset_y));
}
else
{
if (preview_width < width)
render_buf->x = (width - preview_width) / 2;
if (preview_height < height)
render_buf->y = (height - preview_height) / 2;
}
gimp_preview_renderer_render_buffer (renderer, render_buf, -1,
GIMP_PREVIEW_BG_CHECKS,
GIMP_PREVIEW_BG_CHECKS);
temp_buf_free (render_buf);
}
else
{
const gchar *stock_id;
stock_id = gimp_viewable_get_stock_id (renderer->viewable);
gimp_preview_renderer_default_render_stock (renderer, widget, stock_id);
}
}