mirror of https://github.com/GNOME/gimp.git
436 lines
14 KiB
C
436 lines
14 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* gimpaspectpreview.c
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*
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* This library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libgimpwidgets/gimpwidgets.h"
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#include "gimpuitypes.h"
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#include "gimp.h"
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#include "libgimp-intl.h"
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#include "gimpaspectpreview.h"
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/**
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* SECTION: gimpaspectpreview
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* @title: GimpAspectPreview
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* @short_description: A widget providing a preview with fixed aspect ratio.
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*
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* A widget providing a preview with fixed aspect ratio.
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**/
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enum
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{
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PROP_0,
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PROP_DRAWABLE
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};
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struct _GimpAspectPreviewPrivate
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{
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GimpDrawable *drawable;
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};
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typedef struct
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{
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gboolean update;
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} PreviewSettings;
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#define GET_PRIVATE(obj) (((GimpAspectPreview *) (obj))->priv)
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static void gimp_aspect_preview_constructed (GObject *object);
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static void gimp_aspect_preview_dispose (GObject *object);
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static void gimp_aspect_preview_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void gimp_aspect_preview_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gimp_aspect_preview_style_updated (GtkWidget *widget);
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static void gimp_aspect_preview_draw (GimpPreview *preview);
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static void gimp_aspect_preview_draw_buffer (GimpPreview *preview,
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const guchar *buffer,
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gint rowstride);
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static void gimp_aspect_preview_transform (GimpPreview *preview,
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gint src_x,
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gint src_y,
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gint *dest_x,
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gint *dest_y);
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static void gimp_aspect_preview_untransform (GimpPreview *preview,
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gint src_x,
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gint src_y,
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gint *dest_x,
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gint *dest_y);
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static void gimp_aspect_preview_set_drawable (GimpAspectPreview *preview,
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GimpDrawable *drawable);
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G_DEFINE_TYPE_WITH_PRIVATE (GimpAspectPreview, gimp_aspect_preview,
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GIMP_TYPE_PREVIEW)
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#define parent_class gimp_aspect_preview_parent_class
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static gint gimp_aspect_preview_counter = 0;
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static void
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gimp_aspect_preview_class_init (GimpAspectPreviewClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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GimpPreviewClass *preview_class = GIMP_PREVIEW_CLASS (klass);
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object_class->constructed = gimp_aspect_preview_constructed;
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object_class->dispose = gimp_aspect_preview_dispose;
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object_class->get_property = gimp_aspect_preview_get_property;
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object_class->set_property = gimp_aspect_preview_set_property;
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widget_class->style_updated = gimp_aspect_preview_style_updated;
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preview_class->draw = gimp_aspect_preview_draw;
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preview_class->draw_buffer = gimp_aspect_preview_draw_buffer;
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preview_class->transform = gimp_aspect_preview_transform;
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preview_class->untransform = gimp_aspect_preview_untransform;
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/**
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* GimpAspectPreview:drawable-id:
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*
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* The drawable the #GimpAspectPreview is attached to.
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*
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* Since: 2.10
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*/
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g_object_class_install_property (object_class, PROP_DRAWABLE,
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g_param_spec_object ("drawable",
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"Drawable",
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"The drawable this preview is attached to",
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GIMP_TYPE_DRAWABLE,
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GIMP_PARAM_READWRITE |
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G_PARAM_CONSTRUCT_ONLY));
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}
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static void
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gimp_aspect_preview_init (GimpAspectPreview *preview)
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{
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preview->priv = gimp_aspect_preview_get_instance_private (preview);
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g_object_set (gimp_preview_get_area (GIMP_PREVIEW (preview)),
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"check-size", gimp_check_size (),
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"check-type", gimp_check_type (),
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NULL);
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}
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static void
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gimp_aspect_preview_constructed (GObject *object)
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{
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gchar *data_name;
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PreviewSettings settings;
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G_OBJECT_CLASS (parent_class)->constructed (object);
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data_name = g_strdup_printf ("%s-aspect-preview-%d",
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g_get_prgname (),
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gimp_aspect_preview_counter++);
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if (gimp_get_data (data_name, &settings))
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{
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gimp_preview_set_update (GIMP_PREVIEW (object), settings.update);
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}
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g_object_set_data_full (object, "gimp-aspect-preview-data-name",
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data_name, (GDestroyNotify) g_free);
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}
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static void
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gimp_aspect_preview_dispose (GObject *object)
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{
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GimpAspectPreviewPrivate *priv = GET_PRIVATE (object);
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const gchar *data_name;
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data_name = g_object_get_data (G_OBJECT (object),
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"gimp-aspect-preview-data-name");
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if (data_name)
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{
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GimpPreview *preview = GIMP_PREVIEW (object);
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PreviewSettings settings;
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settings.update = gimp_preview_get_update (preview);
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gimp_set_data (data_name, &settings, sizeof (PreviewSettings));
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}
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g_clear_object (&priv->drawable);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gimp_aspect_preview_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GimpAspectPreview *preview = GIMP_ASPECT_PREVIEW (object);
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GimpAspectPreviewPrivate *priv = GET_PRIVATE (preview);
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switch (property_id)
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{
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case PROP_DRAWABLE:
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g_value_set_object (value, priv->drawable);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_aspect_preview_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GimpAspectPreview *preview = GIMP_ASPECT_PREVIEW (object);
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switch (property_id)
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{
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case PROP_DRAWABLE:
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gimp_aspect_preview_set_drawable (preview, g_value_dup_object (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_aspect_preview_style_updated (GtkWidget *widget)
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{
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GimpPreview *preview = GIMP_PREVIEW (widget);
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GtkWidget *area = gimp_preview_get_area (preview);
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GTK_WIDGET_CLASS (parent_class)->style_updated (widget);
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if (area)
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{
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GimpAspectPreviewPrivate *priv = GET_PRIVATE (preview);
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gint width;
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gint height;
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gint preview_width;
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gint preview_height;
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gint size;
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width = gimp_drawable_width (priv->drawable);
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height = gimp_drawable_height (priv->drawable);
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gtk_widget_style_get (widget,
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"size", &size,
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NULL);
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if (width > height)
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{
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preview_width = MIN (width, size);
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preview_height = (height * preview_width) / width;
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}
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else
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{
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preview_height = MIN (height, size);
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preview_width = (width * preview_height) / height;
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}
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gimp_preview_set_size (preview, preview_width, preview_height);
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}
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}
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static void
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gimp_aspect_preview_draw (GimpPreview *preview)
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{
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GtkWidget *area = gimp_preview_get_area (preview);
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gint width;
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gint height;
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gimp_preview_get_size (preview, &width, &height);
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gimp_preview_area_fill (GIMP_PREVIEW_AREA (area),
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0, 0,
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width, height,
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0, 0, 0);
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}
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static void
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gimp_aspect_preview_draw_buffer (GimpPreview *preview,
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const guchar *buffer,
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gint rowstride)
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{
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GimpAspectPreviewPrivate *priv = GET_PRIVATE (preview);
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GtkWidget *area = gimp_preview_get_area (preview);
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GimpImage *image;
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gint width;
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gint height;
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gimp_preview_get_size (preview, &width, &height);
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image = gimp_item_get_image (GIMP_ITEM (priv->drawable));
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if (gimp_selection_is_empty (image))
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{
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gimp_preview_area_draw (GIMP_PREVIEW_AREA (area),
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0, 0,
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width, height,
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gimp_drawable_type (priv->drawable),
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buffer,
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rowstride);
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}
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else
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{
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guchar *sel;
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guchar *src;
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GimpSelection *selection;
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gint w, h;
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gint bpp;
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selection = gimp_image_get_selection (image);
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w = width;
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h = height;
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src = gimp_drawable_get_thumbnail_data (priv->drawable,
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&w, &h, &bpp);
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sel = gimp_drawable_get_thumbnail_data (GIMP_DRAWABLE (selection),
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&w, &h, &bpp);
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g_object_unref (selection);
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gimp_preview_area_mask (GIMP_PREVIEW_AREA (area),
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0, 0, width, height,
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gimp_drawable_type (priv->drawable),
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src, width * gimp_drawable_bpp (priv->drawable),
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buffer, rowstride,
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sel, width);
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g_free (sel);
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g_free (src);
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}
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}
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static void
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gimp_aspect_preview_transform (GimpPreview *preview,
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gint src_x,
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gint src_y,
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gint *dest_x,
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gint *dest_y)
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{
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GimpAspectPreviewPrivate *priv = GET_PRIVATE (preview);
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gint width;
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gint height;
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gimp_preview_get_size (preview, &width, &height);
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*dest_x = (gdouble) src_x * width / gimp_drawable_width (priv->drawable);
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*dest_y = (gdouble) src_y * height / gimp_drawable_height (priv->drawable);
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}
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static void
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gimp_aspect_preview_untransform (GimpPreview *preview,
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gint src_x,
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gint src_y,
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gint *dest_x,
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gint *dest_y)
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{
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GimpAspectPreviewPrivate *priv = GET_PRIVATE (preview);
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gint width;
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gint height;
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gimp_preview_get_size (preview, &width, &height);
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*dest_x = (gdouble) src_x * gimp_drawable_width (priv->drawable) / width;
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*dest_y = (gdouble) src_y * gimp_drawable_height (priv->drawable) / height;
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}
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static void
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gimp_aspect_preview_set_drawable (GimpAspectPreview *preview,
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GimpDrawable *drawable)
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{
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GimpAspectPreviewPrivate *priv = GET_PRIVATE (preview);
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gint d_width;
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gint d_height;
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gint width;
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gint height;
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g_return_if_fail (priv->drawable == NULL);
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priv->drawable = drawable;
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d_width = gimp_drawable_width (priv->drawable);
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d_height = gimp_drawable_height (priv->drawable);
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if (d_width > d_height)
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{
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width = MIN (d_width, 512);
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height = (d_height * width) / d_width;
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}
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else
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{
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height = MIN (d_height, 512);
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width = (d_width * height) / d_height;
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}
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gimp_preview_set_bounds (GIMP_PREVIEW (preview), 0, 0, width, height);
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if (height > 0)
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g_object_set (gimp_preview_get_frame (GIMP_PREVIEW (preview)),
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"ratio",
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(gdouble) d_width / (gdouble) d_height,
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NULL);
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}
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/**
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* gimp_aspect_preview_new_from_drawable:
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* @drawable: (transfer none): a drawable
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*
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* Creates a new #GimpAspectPreview widget for @drawable_. See also
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* gimp_drawable_preview_new_from_drawable().
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*
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* Since: 2.10
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*
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* Returns: a new #GimpAspectPreview.
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**/
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GtkWidget *
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gimp_aspect_preview_new_from_drawable (GimpDrawable *drawable)
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{
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g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
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g_return_val_if_fail (gimp_item_is_valid (GIMP_ITEM (drawable)), NULL);
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return g_object_new (GIMP_TYPE_ASPECT_PREVIEW,
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"drawable", drawable,
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NULL);
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}
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