297 lines
11 KiB
C
297 lines
11 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 <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 "widgets/pikahelp-ids.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 "pikaperspectivetool.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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/* 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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X2,
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Y2,
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X3,
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Y3
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};
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/* local function prototypes */
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static void pika_perspective_tool_matrix_to_info (PikaTransformGridTool *tg_tool,
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const PikaMatrix3 *transform);
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static void pika_perspective_tool_prepare (PikaTransformGridTool *tg_tool);
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static void pika_perspective_tool_readjust (PikaTransformGridTool *tg_tool);
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static PikaToolWidget * pika_perspective_tool_get_widget (PikaTransformGridTool *tg_tool);
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static void pika_perspective_tool_update_widget (PikaTransformGridTool *tg_tool);
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static void pika_perspective_tool_widget_changed (PikaTransformGridTool *tg_tool);
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static void pika_perspective_tool_info_to_points (PikaGenericTransformTool *generic);
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G_DEFINE_TYPE (PikaPerspectiveTool, pika_perspective_tool,
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PIKA_TYPE_GENERIC_TRANSFORM_TOOL)
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#define parent_class pika_perspective_tool_parent_class
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void
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pika_perspective_tool_register (PikaToolRegisterCallback callback,
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gpointer data)
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{
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(* callback) (PIKA_TYPE_PERSPECTIVE_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-perspective-tool",
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_("Perspective"),
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_("Perspective Tool: "
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"Change perspective of the layer, selection or path"),
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N_("_Perspective"), "<shift>P",
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NULL, PIKA_HELP_TOOL_PERSPECTIVE,
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PIKA_ICON_TOOL_PERSPECTIVE,
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data);
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}
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static void
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pika_perspective_tool_class_init (PikaPerspectiveToolClass *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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PikaGenericTransformToolClass *generic_class = PIKA_GENERIC_TRANSFORM_TOOL_CLASS (klass);
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tg_class->matrix_to_info = pika_perspective_tool_matrix_to_info;
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tg_class->prepare = pika_perspective_tool_prepare;
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tg_class->readjust = pika_perspective_tool_readjust;
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tg_class->get_widget = pika_perspective_tool_get_widget;
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tg_class->update_widget = pika_perspective_tool_update_widget;
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tg_class->widget_changed = pika_perspective_tool_widget_changed;
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generic_class->info_to_points = pika_perspective_tool_info_to_points;
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tr_class->undo_desc = C_("undo-type", "Perspective");
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tr_class->progress_text = _("Perspective transformation");
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}
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static void
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pika_perspective_tool_init (PikaPerspectiveTool *perspective_tool)
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{
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PikaTool *tool = PIKA_TOOL (perspective_tool);
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pika_tool_control_set_tool_cursor (tool->control,
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PIKA_TOOL_CURSOR_PERSPECTIVE);
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}
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static void
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pika_perspective_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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pika_matrix3_transform_point (transform,
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tr_tool->x1,
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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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pika_matrix3_transform_point (transform,
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tr_tool->x2,
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tr_tool->y1,
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&tg_tool->trans_info[X1],
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&tg_tool->trans_info[Y1]);
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pika_matrix3_transform_point (transform,
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tr_tool->x1,
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tr_tool->y2,
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&tg_tool->trans_info[X2],
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&tg_tool->trans_info[Y2]);
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pika_matrix3_transform_point (transform,
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tr_tool->x2,
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tr_tool->y2,
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&tg_tool->trans_info[X3],
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&tg_tool->trans_info[Y3]);
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}
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static void
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pika_perspective_tool_prepare (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)->prepare (tg_tool);
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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->y1;
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tg_tool->trans_info[X2] = (gdouble) tr_tool->x1;
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tg_tool->trans_info[Y2] = (gdouble) tr_tool->y2;
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tg_tool->trans_info[X3] = (gdouble) tr_tool->x2;
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tg_tool->trans_info[Y3] = (gdouble) tr_tool->y2;
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}
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static void
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pika_perspective_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 - r, y - r,
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&tg_tool->trans_info[X0],
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&tg_tool->trans_info[Y0]);
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pika_display_shell_untransform_xy_f (shell,
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x + r, y - r,
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&tg_tool->trans_info[X1],
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&tg_tool->trans_info[Y1]);
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pika_display_shell_untransform_xy_f (shell,
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x - r, y + r,
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&tg_tool->trans_info[X2],
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&tg_tool->trans_info[Y2]);
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pika_display_shell_untransform_xy_f (shell,
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x + r, y + r,
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&tg_tool->trans_info[X3],
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&tg_tool->trans_info[Y3]);
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}
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static PikaToolWidget *
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pika_perspective_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_PERSPECTIVE,
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"outside-function", PIKA_TRANSFORM_FUNCTION_PERSPECTIVE,
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"use-perspective-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_perspective_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 (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_perspective_tool_widget_changed (PikaTransformGridTool *tg_tool)
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{
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PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tg_tool);
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PikaMatrix3 *transform;
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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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&tg_tool->trans_info[X0],
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&tg_tool->trans_info[Y0]);
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pika_matrix3_transform_point (transform,
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tr_tool->x2, tr_tool->y1,
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&tg_tool->trans_info[X1],
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&tg_tool->trans_info[Y1]);
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pika_matrix3_transform_point (transform,
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tr_tool->x1, tr_tool->y2,
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&tg_tool->trans_info[X2],
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&tg_tool->trans_info[Y2]);
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pika_matrix3_transform_point (transform,
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tr_tool->x2, tr_tool->y2,
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&tg_tool->trans_info[X3],
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&tg_tool->trans_info[Y3]);
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g_free (transform);
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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_perspective_tool_info_to_points (PikaGenericTransformTool *generic)
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{
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PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (generic);
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PikaTransformGridTool *tg_tool = PIKA_TRANSFORM_GRID_TOOL (generic);
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generic->input_points[0] = (PikaVector2) {tr_tool->x1, tr_tool->y1};
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generic->input_points[1] = (PikaVector2) {tr_tool->x2, tr_tool->y1};
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generic->input_points[2] = (PikaVector2) {tr_tool->x1, tr_tool->y2};
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generic->input_points[3] = (PikaVector2) {tr_tool->x2, tr_tool->y2};
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generic->output_points[0] = (PikaVector2) {tg_tool->trans_info[X0],
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tg_tool->trans_info[Y0]};
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generic->output_points[1] = (PikaVector2) {tg_tool->trans_info[X1],
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tg_tool->trans_info[Y1]};
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generic->output_points[2] = (PikaVector2) {tg_tool->trans_info[X2],
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tg_tool->trans_info[Y2]};
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generic->output_points[3] = (PikaVector2) {tg_tool->trans_info[X3],
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tg_tool->trans_info[Y3]};
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}
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