gimp/app/widgets/gimpviewrendererdrawable.c

250 lines
8.1 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpviewrendererdrawable.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/gimp-utils.h"
#include "core/gimpdrawable.h"
#include "core/gimpdrawable-preview.h"
#include "core/gimpimage.h"
#include "gimpviewrendererdrawable.h"
static void gimp_view_renderer_drawable_class_init (GimpViewRendererDrawableClass *klass);
static void gimp_view_renderer_drawable_render (GimpViewRenderer *renderer,
GtkWidget *widget);
static GimpViewRendererClass *parent_class = NULL;
GType
gimp_view_renderer_drawable_get_type (void)
{
static GType renderer_type = 0;
if (! renderer_type)
{
static const GTypeInfo renderer_info =
{
sizeof (GimpViewRendererDrawableClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gimp_view_renderer_drawable_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpViewRendererDrawable),
0, /* n_preallocs */
NULL /* instance_init */
};
renderer_type = g_type_register_static (GIMP_TYPE_VIEW_RENDERER,
"GimpViewRendererDrawable",
&renderer_info, 0);
}
return renderer_type;
}
static void
gimp_view_renderer_drawable_class_init (GimpViewRendererDrawableClass *klass)
{
GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
renderer_class->render = gimp_view_renderer_drawable_render;
}
static void
gimp_view_renderer_drawable_render (GimpViewRenderer *renderer,
GtkWidget *widget)
{
GimpDrawable *drawable;
GimpItem *item;
GimpImage *gimage;
gint width;
gint height;
gint view_width;
gint view_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 (item->width,
item->height,
width,
height,
renderer->dot_for_dot,
gimage->xresolution,
gimage->yresolution,
&view_width,
&view_height,
&scaling_up);
}
else
{
gimp_viewable_calc_preview_size (item->width,
item->height,
width,
height,
renderer->dot_for_dot,
gimage ? gimage->xresolution : 1.0,
gimage ? gimage->yresolution : 1.0,
&view_width,
&view_height,
&scaling_up);
}
if ((view_width * view_height) < (item->width * item->height * 4))
scaling_up = FALSE;
if (scaling_up)
{
if (gimage && ! renderer->is_popup)
{
gint src_x, src_y;
gint src_width, src_height;
if (gimp_rectangle_intersect (0, 0,
item->width, item->height,
-item->offset_x, -item->offset_y,
gimage->width, gimage->height,
&src_x, &src_y,
&src_width, &src_height))
{
gint dest_width;
gint dest_height;
dest_width = ROUND (((gdouble) renderer->width /
(gdouble) gimage->width) *
(gdouble) src_width);
dest_height = ROUND (((gdouble) renderer->height /
(gdouble) gimage->height) *
(gdouble) src_height);
if (dest_width < 1) dest_width = 1;
if (dest_height < 1) dest_height = 1;
render_buf = gimp_drawable_get_sub_preview (drawable,
src_x, src_y,
src_width, src_height,
dest_width, dest_height);
}
else
{
gint bytes = gimp_drawable_preview_bytes (drawable);
guchar empty[4] = { 0, 0, 0, 0 };
render_buf = temp_buf_new (1, 1, bytes, 0, 0, empty);
}
}
else
{
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, 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)
{
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));
if (scaling_up)
{
if (render_buf->x < 0) render_buf->x = 0;
if (render_buf->y < 0) render_buf->y = 0;
}
}
else
{
if (view_width < width)
render_buf->x = (width - view_width) / 2;
if (view_height < height)
render_buf->y = (height - view_height) / 2;
}
gimp_view_renderer_render_buffer (renderer, render_buf, -1,
GIMP_VIEW_BG_CHECKS,
GIMP_VIEW_BG_CHECKS);
temp_buf_free (render_buf);
}
else
{
const gchar *stock_id;
stock_id = gimp_viewable_get_stock_id (renderer->viewable);
gimp_view_renderer_default_render_stock (renderer, widget, stock_id);
}
}