PIKApp/app/widgets/pikaviewrendererimage.c

196 lines
6.6 KiB
C

/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikaviewrendererimage.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 "libpikawidgets/pikawidgets.h"
#include "widgets-types.h"
#include "core/pikaimage.h"
#include "core/pikaimageproxy.h"
#include "core/pikatempbuf.h"
#include "pikaviewrendererimage.h"
static void pika_view_renderer_image_render (PikaViewRenderer *renderer,
GtkWidget *widget);
G_DEFINE_TYPE (PikaViewRendererImage, pika_view_renderer_image,
PIKA_TYPE_VIEW_RENDERER)
#define parent_class pika_view_renderer_image_parent_class
static void
pika_view_renderer_image_class_init (PikaViewRendererImageClass *klass)
{
PikaViewRendererClass *renderer_class = PIKA_VIEW_RENDERER_CLASS (klass);
renderer_class->render = pika_view_renderer_image_render;
}
static void
pika_view_renderer_image_init (PikaViewRendererImage *renderer)
{
renderer->channel = -1;
}
static void
pika_view_renderer_image_render (PikaViewRenderer *renderer,
GtkWidget *widget)
{
PikaViewRendererImage *rendererimage = PIKA_VIEW_RENDERER_IMAGE (renderer);
PikaImage *image;
const gchar *icon_name;
gint width;
gint height;
if (PIKA_IS_IMAGE (renderer->viewable))
{
image = PIKA_IMAGE (renderer->viewable);
}
else if (PIKA_IS_IMAGE_PROXY (renderer->viewable))
{
image = pika_image_proxy_get_image (
PIKA_IMAGE_PROXY (renderer->viewable));
}
else
{
g_return_if_reached ();
}
pika_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 ||
(pika_image_get_component_visible (image, rendererimage->channel)))
{
gint view_width;
gint view_height;
gdouble xres;
gdouble yres;
gboolean scaling_up;
PikaTempBuf *render_buf = NULL;
pika_image_get_resolution (image, &xres, &yres);
pika_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)
{
PikaTempBuf *temp_buf;
temp_buf = pika_viewable_get_new_preview (renderer->viewable,
renderer->context,
width, height);
if (temp_buf)
{
render_buf = pika_temp_buf_scale (temp_buf,
view_width, view_height);
pika_temp_buf_unref (temp_buf);
}
}
else
{
render_buf = pika_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)
{
PikaTempBuf *temp_buf;
temp_buf = pika_temp_buf_scale (render_buf,
renderer->width, renderer->height);
pika_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 =
pika_image_get_component_index (image, rendererimage->channel);
pika_view_renderer_render_temp_buf (renderer, widget, render_buf,
render_buf_x, render_buf_y,
component_index,
PIKA_VIEW_BG_CHECKS,
PIKA_VIEW_BG_WHITE);
pika_temp_buf_unref (render_buf);
return;
}
}
switch (rendererimage->channel)
{
case PIKA_CHANNEL_RED: icon_name = PIKA_ICON_CHANNEL_RED; break;
case PIKA_CHANNEL_GREEN: icon_name = PIKA_ICON_CHANNEL_GREEN; break;
case PIKA_CHANNEL_BLUE: icon_name = PIKA_ICON_CHANNEL_BLUE; break;
case PIKA_CHANNEL_GRAY: icon_name = PIKA_ICON_CHANNEL_GRAY; break;
case PIKA_CHANNEL_INDEXED: icon_name = PIKA_ICON_CHANNEL_INDEXED; break;
case PIKA_CHANNEL_ALPHA: icon_name = PIKA_ICON_CHANNEL_ALPHA; break;
default:
icon_name = pika_viewable_get_icon_name (renderer->viewable);
break;
}
pika_view_renderer_render_icon (renderer, widget, icon_name);
}