479 lines
16 KiB
C
479 lines
16 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikamath/pikamath.h"
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#include "libpikawidgets/pikawidgets.h"
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#include "tools-types.h"
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#include "core/pika-transform-utils.h"
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#include "core/pikaimage.h"
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#include "widgets/pikahelp-ids.h"
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#include "widgets/pikasizebox.h"
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#include "display/pikadisplay.h"
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#include "display/pikadisplayshell.h"
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#include "display/pikadisplayshell-transform.h"
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#include "display/pikatoolgui.h"
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#include "display/pikatooltransformgrid.h"
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#include "pikascaletool.h"
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#include "pikatoolcontrol.h"
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#include "pikatransformgridoptions.h"
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#include "pika-intl.h"
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#define EPSILON 1e-6
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/* index into trans_info array */
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enum
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{
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X0,
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Y0,
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X1,
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Y1
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};
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/* local function prototypes */
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static gboolean pika_scale_tool_info_to_matrix (PikaTransformGridTool *tg_tool,
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PikaMatrix3 *transform);
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static void pika_scale_tool_matrix_to_info (PikaTransformGridTool *tg_tool,
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const PikaMatrix3 *transform);
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static gchar * pika_scale_tool_get_undo_desc (PikaTransformGridTool *tg_tool);
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static void pika_scale_tool_dialog (PikaTransformGridTool *tg_tool);
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static void pika_scale_tool_dialog_update (PikaTransformGridTool *tg_tool);
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static void pika_scale_tool_prepare (PikaTransformGridTool *tg_tool);
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static void pika_scale_tool_readjust (PikaTransformGridTool *tg_tool);
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static PikaToolWidget * pika_scale_tool_get_widget (PikaTransformGridTool *tg_tool);
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static void pika_scale_tool_update_widget (PikaTransformGridTool *tg_tool);
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static void pika_scale_tool_widget_changed (PikaTransformGridTool *tg_tool);
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static void pika_scale_tool_size_notify (GtkWidget *box,
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GParamSpec *pspec,
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PikaTransformGridTool *tg_tool);
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G_DEFINE_TYPE (PikaScaleTool, pika_scale_tool, PIKA_TYPE_TRANSFORM_GRID_TOOL)
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#define parent_class pika_scale_tool_parent_class
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void
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pika_scale_tool_register (PikaToolRegisterCallback callback,
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gpointer data)
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{
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(* callback) (PIKA_TYPE_SCALE_TOOL,
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PIKA_TYPE_TRANSFORM_GRID_OPTIONS,
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pika_transform_grid_options_gui,
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PIKA_CONTEXT_PROP_MASK_BACKGROUND,
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"pika-scale-tool",
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_("Scale"),
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_("Scale Tool: Scale the layer, selection or path"),
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N_("_Scale"), "<shift>S",
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NULL, PIKA_HELP_TOOL_SCALE,
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PIKA_ICON_TOOL_SCALE,
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data);
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}
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static void
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pika_scale_tool_class_init (PikaScaleToolClass *klass)
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{
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PikaTransformToolClass *tr_class = PIKA_TRANSFORM_TOOL_CLASS (klass);
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PikaTransformGridToolClass *tg_class = PIKA_TRANSFORM_GRID_TOOL_CLASS (klass);
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tg_class->info_to_matrix = pika_scale_tool_info_to_matrix;
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tg_class->matrix_to_info = pika_scale_tool_matrix_to_info;
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tg_class->get_undo_desc = pika_scale_tool_get_undo_desc;
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tg_class->dialog = pika_scale_tool_dialog;
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tg_class->dialog_update = pika_scale_tool_dialog_update;
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tg_class->prepare = pika_scale_tool_prepare;
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tg_class->readjust = pika_scale_tool_readjust;
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tg_class->get_widget = pika_scale_tool_get_widget;
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tg_class->update_widget = pika_scale_tool_update_widget;
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tg_class->widget_changed = pika_scale_tool_widget_changed;
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tr_class->undo_desc = C_("undo-type", "Scale");
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tr_class->progress_text = _("Scaling");
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tg_class->ok_button_label = _("_Scale");
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}
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static void
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pika_scale_tool_init (PikaScaleTool *scale_tool)
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{
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PikaTool *tool = PIKA_TOOL (scale_tool);
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pika_tool_control_set_tool_cursor (tool->control, PIKA_TOOL_CURSOR_RESIZE);
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}
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static gboolean
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pika_scale_tool_info_to_matrix (PikaTransformGridTool *tg_tool,
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PikaMatrix3 *transform)
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{
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PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
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pika_matrix3_identity (transform);
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pika_transform_matrix_scale (transform,
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tr_tool->x1,
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tr_tool->y1,
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tr_tool->x2 - tr_tool->x1,
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tr_tool->y2 - tr_tool->y1,
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tg_tool->trans_info[X0],
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tg_tool->trans_info[Y0],
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tg_tool->trans_info[X1] - tg_tool->trans_info[X0],
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tg_tool->trans_info[Y1] - tg_tool->trans_info[Y0]);
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return TRUE;
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}
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static void
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pika_scale_tool_matrix_to_info (PikaTransformGridTool *tg_tool,
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const PikaMatrix3 *transform)
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{
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PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
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gdouble x;
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gdouble y;
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gdouble w;
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gdouble h;
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x = transform->coeff[0][2];
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y = transform->coeff[1][2];
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w = transform->coeff[0][0];
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h = transform->coeff[1][1];
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tg_tool->trans_info[X0] = x + w * tr_tool->x1;
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tg_tool->trans_info[Y0] = y + h * tr_tool->y1;
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tg_tool->trans_info[X1] = tg_tool->trans_info[X0] +
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w * (tr_tool->x2 - tr_tool->x1);
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tg_tool->trans_info[Y1] = tg_tool->trans_info[Y0] +
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h * (tr_tool->y2 - tr_tool->y1);
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}
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static gchar *
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pika_scale_tool_get_undo_desc (PikaTransformGridTool *tg_tool)
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{
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gint width;
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gint height;
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width = ROUND (tg_tool->trans_info[X1] - tg_tool->trans_info[X0]);
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height = ROUND (tg_tool->trans_info[Y1] - tg_tool->trans_info[Y0]);
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return g_strdup_printf (C_("undo-type", "Scale to %d x %d"),
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width, height);
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}
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static void
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pika_scale_tool_dialog (PikaTransformGridTool *tg_tool)
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{
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}
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static void
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pika_scale_tool_dialog_update (PikaTransformGridTool *tg_tool)
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{
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PikaTransformGridOptions *options = PIKA_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
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gint width;
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gint height;
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width = ROUND (tg_tool->trans_info[X1] - tg_tool->trans_info[X0]);
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height = ROUND (tg_tool->trans_info[Y1] - tg_tool->trans_info[Y0]);
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g_object_set (PIKA_SCALE_TOOL (tg_tool)->box,
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"width", width,
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"height", height,
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"keep-aspect", options->constrain_scale,
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NULL);
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}
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static void
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pika_scale_tool_prepare (PikaTransformGridTool *tg_tool)
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{
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PikaScaleTool *scale = PIKA_SCALE_TOOL (tg_tool);
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PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
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PikaTransformGridOptions *options = PIKA_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
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PikaDisplay *display = PIKA_TOOL (tg_tool)->display;
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gdouble xres;
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gdouble yres;
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tg_tool->trans_info[X0] = (gdouble) tr_tool->x1;
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tg_tool->trans_info[Y0] = (gdouble) tr_tool->y1;
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tg_tool->trans_info[X1] = (gdouble) tr_tool->x2;
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tg_tool->trans_info[Y1] = (gdouble) tr_tool->y2;
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pika_image_get_resolution (pika_display_get_image (display),
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&xres, &yres);
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if (scale->box)
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{
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g_signal_handlers_disconnect_by_func (scale->box,
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pika_scale_tool_size_notify,
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tg_tool);
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gtk_widget_destroy (scale->box);
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}
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/* Need to create a new PikaSizeBox widget because the initial
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* width and height is what counts as 100%.
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*/
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scale->box =
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g_object_new (PIKA_TYPE_SIZE_BOX,
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"width", tr_tool->x2 - tr_tool->x1,
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"height", tr_tool->y2 - tr_tool->y1,
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"keep-aspect", options->constrain_scale,
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"unit", pika_display_get_shell (display)->unit,
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"xresolution", xres,
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"yresolution", yres,
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NULL);
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gtk_box_pack_start (GTK_BOX (pika_tool_gui_get_vbox (tg_tool->gui)),
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scale->box, FALSE, FALSE, 0);
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gtk_widget_show (scale->box);
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g_signal_connect (scale->box, "notify",
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G_CALLBACK (pika_scale_tool_size_notify),
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tg_tool);
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}
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static void
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pika_scale_tool_readjust (PikaTransformGridTool *tg_tool)
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{
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PikaTool *tool = PIKA_TOOL (tg_tool);
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PikaDisplayShell *shell = pika_display_get_shell (tool->display);
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gdouble x;
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gdouble y;
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gdouble r;
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x = shell->disp_width / 2.0;
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y = shell->disp_height / 2.0;
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r = MAX (MIN (x, y) / G_SQRT2 -
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PIKA_TOOL_TRANSFORM_GRID_MAX_HANDLE_SIZE / 2.0,
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PIKA_TOOL_TRANSFORM_GRID_MAX_HANDLE_SIZE / 2.0);
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pika_display_shell_untransform_xy_f (shell,
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x, y,
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&x, &y);
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tg_tool->trans_info[X0] = RINT (x - FUNSCALEX (shell, r));
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tg_tool->trans_info[Y0] = RINT (y - FUNSCALEY (shell, r));
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tg_tool->trans_info[X1] = RINT (x + FUNSCALEX (shell, r));
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tg_tool->trans_info[Y1] = RINT (y + FUNSCALEY (shell, r));
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}
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static PikaToolWidget *
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pika_scale_tool_get_widget (PikaTransformGridTool *tg_tool)
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{
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PikaTool *tool = PIKA_TOOL (tg_tool);
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PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
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PikaDisplayShell *shell = pika_display_get_shell (tool->display);
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PikaToolWidget *widget;
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widget = pika_tool_transform_grid_new (shell,
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&tr_tool->transform,
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tr_tool->x1,
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tr_tool->y1,
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tr_tool->x2,
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tr_tool->y2);
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g_object_set (widget,
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"inside-function", PIKA_TRANSFORM_FUNCTION_SCALE,
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"outside-function", PIKA_TRANSFORM_FUNCTION_SCALE,
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"use-corner-handles", TRUE,
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"use-side-handles", TRUE,
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"use-center-handle", TRUE,
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NULL);
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return widget;
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}
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static void
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pika_scale_tool_update_widget (PikaTransformGridTool *tg_tool)
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{
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PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
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PIKA_TRANSFORM_GRID_TOOL_CLASS (parent_class)->update_widget (tg_tool);
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g_object_set (
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tg_tool->widget,
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"x1", (gdouble) tr_tool->x1,
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"y1", (gdouble) tr_tool->y1,
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"x2", (gdouble) tr_tool->x2,
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"y2", (gdouble) tr_tool->y2,
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NULL);
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}
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static void
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pika_scale_tool_widget_changed (PikaTransformGridTool *tg_tool)
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{
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PikaTool *tool = PIKA_TOOL (tg_tool);
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PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
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PikaMatrix3 *transform;
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gdouble x0, y0;
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gdouble x1, y1;
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gint width, height;
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g_object_get (tg_tool->widget,
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"transform", &transform,
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NULL);
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pika_matrix3_transform_point (transform,
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tr_tool->x1, tr_tool->y1,
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&x0, &y0);
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pika_matrix3_transform_point (transform,
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tr_tool->x2, tr_tool->y2,
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&x1, &y1);
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g_free (transform);
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width = ROUND (x1 - x0);
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height = ROUND (y1 - y0);
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if (width > 0)
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{
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tg_tool->trans_info[X0] = x0;
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tg_tool->trans_info[X1] = x1;
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}
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else if (fabs (x0 - tg_tool->trans_info[X0]) < EPSILON)
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{
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tg_tool->trans_info[X1] = tg_tool->trans_info[X0] + 1.0;
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}
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else if (fabs (x1 - tg_tool->trans_info[X1]) < EPSILON)
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{
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tg_tool->trans_info[X0] = tg_tool->trans_info[X1] - 1.0;
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}
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else
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{
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tg_tool->trans_info[X0] = (x0 + x1) / 2.0 - 0.5;
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tg_tool->trans_info[X1] = (x0 + x1) / 2.0 + 0.5;
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}
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if (height > 0)
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{
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tg_tool->trans_info[Y0] = y0;
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tg_tool->trans_info[Y1] = y1;
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}
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else if (fabs (y0 - tg_tool->trans_info[Y0]) < EPSILON)
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{
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tg_tool->trans_info[Y1] = tg_tool->trans_info[Y0] + 1.0;
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}
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else if (fabs (y1 - tg_tool->trans_info[Y1]) < EPSILON)
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{
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tg_tool->trans_info[Y0] = tg_tool->trans_info[Y1] - 1.0;
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}
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else
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{
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tg_tool->trans_info[Y0] = (y0 + y1) / 2.0 - 0.5;
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tg_tool->trans_info[Y1] = (y0 + y1) / 2.0 + 0.5;
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}
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if (width <= 0 || height <= 0)
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pika_transform_tool_recalc_matrix (tr_tool, tool->display);
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PIKA_TRANSFORM_GRID_TOOL_CLASS (parent_class)->widget_changed (tg_tool);
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}
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static void
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pika_scale_tool_size_notify (GtkWidget *box,
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GParamSpec *pspec,
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PikaTransformGridTool *tg_tool)
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{
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PikaTransformGridOptions *options = PIKA_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
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if (! strcmp (pspec->name, "width") ||
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! strcmp (pspec->name, "height"))
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{
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gint width;
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gint height;
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gint old_width;
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gint old_height;
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g_object_get (box,
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"width", &width,
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"height", &height,
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NULL);
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old_width = ROUND (tg_tool->trans_info[X1] - tg_tool->trans_info[X0]);
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old_height = ROUND (tg_tool->trans_info[Y1] - tg_tool->trans_info[Y0]);
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if ((width != old_width) || (height != old_height))
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{
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PikaTool *tool = PIKA_TOOL (tg_tool);
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PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
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if (options->frompivot_scale)
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{
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gdouble center_x;
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gdouble center_y;
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center_x = (tg_tool->trans_info[X0] +
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tg_tool->trans_info[X1]) / 2.0;
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center_y = (tg_tool->trans_info[Y0] +
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tg_tool->trans_info[Y1]) / 2.0;
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tg_tool->trans_info[X0] = center_x - width / 2.0;
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tg_tool->trans_info[Y0] = center_y - height / 2.0;
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tg_tool->trans_info[X1] = center_x + width / 2.0;
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tg_tool->trans_info[Y1] = center_y + height / 2.0;
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}
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else
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{
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tg_tool->trans_info[X1] = tg_tool->trans_info[X0] + width;
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tg_tool->trans_info[Y1] = tg_tool->trans_info[Y0] + height;
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}
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pika_transform_grid_tool_push_internal_undo (tg_tool, TRUE);
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pika_transform_tool_recalc_matrix (tr_tool, tool->display);
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}
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}
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else if (! strcmp (pspec->name, "keep-aspect"))
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{
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gboolean constrain;
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g_object_get (box,
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"keep-aspect", &constrain,
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NULL);
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if (constrain != options->constrain_scale)
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{
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gint width;
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gint height;
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g_object_get (box,
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"width", &width,
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"height", &height,
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NULL);
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g_object_set (options,
|
|
"constrain-scale", constrain,
|
|
NULL);
|
|
}
|
|
}
|
|
}
|
