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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpviewrendererimage.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 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/gimpimage.h"
#include "core/gimpimageproxy.h"
#include "core/gimptempbuf.h"
#include "gimpviewrendererimage.h"
static void gimp_view_renderer_image_render (GimpViewRenderer *renderer,
GtkWidget *widget);
G_DEFINE_TYPE (GimpViewRendererImage, gimp_view_renderer_image,
GIMP_TYPE_VIEW_RENDERER)
#define parent_class gimp_view_renderer_image_parent_class
static void
gimp_view_renderer_image_class_init (GimpViewRendererImageClass *klass)
{
GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);
renderer_class->render = gimp_view_renderer_image_render;
}
static void
gimp_view_renderer_image_init (GimpViewRendererImage *renderer)
{
renderer->channel = -1;
}
static void
gimp_view_renderer_image_render (GimpViewRenderer *renderer,
GtkWidget *widget)
{
GimpViewRendererImage *rendererimage = GIMP_VIEW_RENDERER_IMAGE (renderer);
GimpImage *image;
const gchar *icon_name;
gint width;
gint height;
if (GIMP_IS_IMAGE (renderer->viewable))
{
image = GIMP_IMAGE (renderer->viewable);
}
else if (GIMP_IS_IMAGE_PROXY (renderer->viewable))
{
image = gimp_image_proxy_get_image (
GIMP_IMAGE_PROXY (renderer->viewable));
}
else
{
g_return_if_reached ();
}
gimp_viewable_get_size (renderer->viewable, &width, &height);
/* The conditions checked here are mostly a hack to hide the fact that
* we are creating the channel preview from the image preview and turning
* off visibility of a channel has the side-effect of painting the channel
* preview all black. See bug #459518 for details.
*/
if (rendererimage->channel == -1 ||
(gimp_image_get_component_visible (image, rendererimage->channel)))
{
gint view_width;
gint view_height;
gdouble xres;
gdouble yres;
gboolean scaling_up;
GimpTempBuf *render_buf = NULL;
gimp_image_get_resolution (image, &xres, &yres);
gimp_viewable_calc_preview_size (width,
height,
renderer->width,
renderer->height,
renderer->dot_for_dot,
xres,
yres,
&view_width,
&view_height,
&scaling_up);
if (scaling_up)
{
GimpTempBuf *temp_buf;
temp_buf = gimp_viewable_get_new_preview (renderer->viewable,
renderer->context,
width, height);
if (temp_buf)
{
render_buf = gimp_temp_buf_scale (temp_buf,
view_width, view_height);
gimp_temp_buf_unref (temp_buf);
}
}
else
{
render_buf = gimp_viewable_get_new_preview (renderer->viewable,
renderer->context,
view_width,
view_height);
}
if (render_buf)
{
gint render_buf_x = 0;
gint render_buf_y = 0;
gint component_index = -1;
/* xresolution != yresolution */
if (view_width > renderer->width || view_height > renderer->height)
{
GimpTempBuf *temp_buf;
temp_buf = gimp_temp_buf_scale (render_buf,
renderer->width, renderer->height);
gimp_temp_buf_unref (render_buf);
render_buf = temp_buf;
}
if (view_width < renderer->width)
render_buf_x = (renderer->width - view_width) / 2;
if (view_height < renderer->height)
render_buf_y = (renderer->height - view_height) / 2;
if (rendererimage->channel != -1)
component_index =
gimp_image_get_component_index (image, rendererimage->channel);
gimp_view_renderer_render_temp_buf (renderer, widget, render_buf,
render_buf_x, render_buf_y,
component_index,
GIMP_VIEW_BG_CHECKS,
GIMP_VIEW_BG_WHITE);
gimp_temp_buf_unref (render_buf);
return;
}
}
switch (rendererimage->channel)
{
case GIMP_CHANNEL_RED: icon_name = GIMP_ICON_CHANNEL_RED; break;
case GIMP_CHANNEL_GREEN: icon_name = GIMP_ICON_CHANNEL_GREEN; break;
case GIMP_CHANNEL_BLUE: icon_name = GIMP_ICON_CHANNEL_BLUE; break;
case GIMP_CHANNEL_GRAY: icon_name = GIMP_ICON_CHANNEL_GRAY; break;
case GIMP_CHANNEL_INDEXED: icon_name = GIMP_ICON_CHANNEL_INDEXED; break;
case GIMP_CHANNEL_ALPHA: icon_name = GIMP_ICON_CHANNEL_ALPHA; break;
default:
icon_name = gimp_viewable_get_icon_name (renderer->viewable);
break;
}
gimp_view_renderer_render_icon (renderer, widget, icon_name);
}
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