mirror of https://github.com/GNOME/gimp.git
593 lines
16 KiB
C
593 lines
16 KiB
C
/* The GIMP -- an image manipulation program
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include "appenv.h"
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#include "drawable.h"
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#include "gdisplay.h"
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#include "gimage_mask.h"
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#include "info_dialog.h"
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#include "scale_tool.h"
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#include "selection.h"
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#include "tools.h"
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#include "transform_core.h"
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#include "transform_tool.h"
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#include "undo.h"
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#include "tile_manager_pvt.h"
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#include "libgimp/gimpintl.h"
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#define X1 0
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#define Y1 1
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#define X2 2
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#define Y2 3
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/* storage for information dialog fields */
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char orig_width_buf [MAX_INFO_BUF];
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char orig_height_buf [MAX_INFO_BUF];
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char width_buf [MAX_INFO_BUF];
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char height_buf [MAX_INFO_BUF];
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char x_ratio_buf [MAX_INFO_BUF];
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char y_ratio_buf [MAX_INFO_BUF];
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/* forward function declarations */
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static void * scale_tool_scale (GImage *, GimpDrawable *, double *, TileManager *, int, GimpMatrix);
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static void * scale_tool_recalc (Tool *, void *);
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static void scale_tool_motion (Tool *, void *);
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static void scale_info_update (Tool *);
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static Argument * scale_invoker (Argument *);
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/* callback functions for the info dialog entries */
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static void scale_width_changed (GtkWidget *entry, gpointer data);
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static void scale_height_changed (GtkWidget *entry, gpointer data);
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void *
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scale_tool_transform (tool, gdisp_ptr, state)
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Tool * tool;
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gpointer gdisp_ptr;
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int state;
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{
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GDisplay * gdisp;
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TransformCore * transform_core;
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gdisp = (GDisplay *) gdisp_ptr;
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transform_core = (TransformCore *) tool->private;
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switch (state)
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{
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case INIT :
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if (!transform_info)
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{
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transform_info = info_dialog_new (_("Scaling Information"));
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info_dialog_add_field (transform_info, _("Original Width: "), orig_width_buf, NULL, NULL);
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info_dialog_add_field (transform_info, _("Original Height: "), orig_height_buf, NULL, NULL);
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info_dialog_add_field (transform_info, _("Current Width: "), width_buf, scale_width_changed, tool);
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info_dialog_add_field (transform_info, _("Current Height: "), height_buf, scale_height_changed, tool);
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info_dialog_add_field (transform_info, _("X Scale Ratio: "), x_ratio_buf, NULL, NULL);
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info_dialog_add_field (transform_info, _("Y Scale Ratio: "), y_ratio_buf, NULL, NULL);
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}
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transform_core->trans_info [X1] = (double) transform_core->x1;
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transform_core->trans_info [Y1] = (double) transform_core->y1;
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transform_core->trans_info [X2] = (double) transform_core->x2;
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transform_core->trans_info [Y2] = (double) transform_core->y2;
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return NULL;
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break;
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case MOTION :
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scale_tool_motion (tool, gdisp_ptr);
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return (scale_tool_recalc (tool, gdisp_ptr));
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break;
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case RECALC :
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return (scale_tool_recalc (tool, gdisp_ptr));
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break;
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case FINISH :
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return scale_tool_scale (gdisp->gimage, gimage_active_drawable (gdisp->gimage),
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transform_core->trans_info, transform_core->original,
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transform_tool_smoothing (), transform_core->transform);
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break;
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}
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return NULL;
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}
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Tool *
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tools_new_scale_tool ()
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{
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Tool * tool;
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TransformCore * private;
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tool = transform_core_new (SCALE, INTERACTIVE);
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private = tool->private;
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/* set the rotation specific transformation attributes */
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private->trans_func = scale_tool_transform;
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private->trans_info[X1] = 0;
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private->trans_info[Y1] = 0;
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private->trans_info[X2] = 0;
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private->trans_info[Y2] = 0;
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/* assemble the transformation matrix */
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gimp_matrix_identity (private->transform);
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return tool;
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}
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void
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tools_free_scale_tool (tool)
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Tool * tool;
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{
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transform_core_free (tool);
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}
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static void
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scale_info_update (tool)
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Tool * tool;
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{
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GDisplay * gdisp;
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TransformCore * transform_core;
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double ratio_x, ratio_y;
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int x1, y1, x2, y2, x3, y3, x4, y4;
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gdisp = (GDisplay *) tool->gdisp_ptr;
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transform_core = (TransformCore *) tool->private;
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/* Find original sizes */
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x1 = transform_core->x1;
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y1 = transform_core->y1;
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x2 = transform_core->x2;
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y2 = transform_core->y2;
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sprintf (orig_width_buf, "%d", x2 - x1);
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sprintf (orig_height_buf, "%d", y2 - y1);
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/* Find current sizes */
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x3 = (int) transform_core->trans_info [X1];
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y3 = (int) transform_core->trans_info [Y1];
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x4 = (int) transform_core->trans_info [X2];
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y4 = (int) transform_core->trans_info [Y2];
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sprintf (width_buf, "%d", x4 - x3);
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sprintf (height_buf, "%d", y4 - y3);
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ratio_x = ratio_y = 0.0;
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if (x2 - x1)
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ratio_x = (double) (x4 - x3) / (double) (x2 - x1);
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if (y2 - y1)
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ratio_y = (double) (y4 - y3) / (double) (y2 - y1);
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sprintf (x_ratio_buf, "%0.2f", ratio_x);
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sprintf (y_ratio_buf, "%0.2f", ratio_y);
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info_dialog_update (transform_info);
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info_dialog_popup (transform_info);
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}
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static void
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scale_width_changed (GtkWidget *w,
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gpointer data)
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{
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Tool * tool;
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TransformCore * transform_core;
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GDisplay * gdisp;
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gchar *str;
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int value;
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tool = (Tool *)data;
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if (tool)
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{
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gdisp = (GDisplay *) tool->gdisp_ptr;
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transform_core = (TransformCore *) tool->private;
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str = g_strdup (gtk_entry_get_text (GTK_ENTRY (w)));
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value = (int) atof(str);
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if (value != (transform_core->trans_info[X2] - transform_core->trans_info[X1]))
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{
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draw_core_pause (transform_core->core, tool);
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transform_core->trans_info[X2] = transform_core->trans_info[X1] + value;
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scale_tool_recalc (tool, gdisp);
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draw_core_resume (transform_core->core, tool);
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}
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g_free (str);
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}
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}
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static void
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scale_height_changed (GtkWidget *w,
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gpointer data)
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{
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Tool * tool;
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TransformCore * transform_core;
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GDisplay * gdisp;
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gchar *str;
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int value;
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tool = (Tool *)data;
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if (tool)
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{
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gdisp = (GDisplay *) tool->gdisp_ptr;
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transform_core = (TransformCore *) tool->private;
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str = g_strdup (gtk_entry_get_text (GTK_ENTRY (w)));
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value = (int) atof(str);
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if (value != (transform_core->trans_info[Y2] - transform_core->trans_info[Y1]))
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{
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draw_core_pause (transform_core->core, tool);
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transform_core->trans_info[Y2] = transform_core->trans_info[Y1] + value;
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scale_tool_recalc (tool, gdisp);
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draw_core_resume (transform_core->core, tool);
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}
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g_free (str);
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}
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}
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static void
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scale_tool_motion (tool, gdisp_ptr)
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Tool * tool;
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void * gdisp_ptr;
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{
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GDisplay * gdisp;
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TransformCore * transform_core;
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double ratio;
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double *x1, *y1;
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double *x2, *y2;
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int w, h;
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int dir_x, dir_y;
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int diff_x, diff_y;
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gdisp = (GDisplay *) gdisp_ptr;
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transform_core = (TransformCore *) tool->private;
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diff_x = transform_core->curx - transform_core->lastx;
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diff_y = transform_core->cury - transform_core->lasty;
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switch (transform_core->function)
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{
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case HANDLE_1 :
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x1 = &transform_core->trans_info [X1];
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y1 = &transform_core->trans_info [Y1];
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x2 = &transform_core->trans_info [X2];
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y2 = &transform_core->trans_info [Y2];
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dir_x = dir_y = 1;
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break;
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case HANDLE_2 :
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x1 = &transform_core->trans_info [X2];
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y1 = &transform_core->trans_info [Y1];
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x2 = &transform_core->trans_info [X1];
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y2 = &transform_core->trans_info [Y2];
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dir_x = -1;
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dir_y = 1;
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break;
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case HANDLE_3 :
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x1 = &transform_core->trans_info [X1];
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y1 = &transform_core->trans_info [Y2];
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x2 = &transform_core->trans_info [X2];
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y2 = &transform_core->trans_info [Y1];
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dir_x = 1;
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dir_y = -1;
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break;
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case HANDLE_4 :
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x1 = &transform_core->trans_info [X2];
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y1 = &transform_core->trans_info [Y2];
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x2 = &transform_core->trans_info [X1];
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y2 = &transform_core->trans_info [Y1];
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dir_x = dir_y = -1;
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break;
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default :
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return;
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}
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/* if just the control key is down, affect only the height */
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if (transform_core->state & ControlMask && ! (transform_core->state & ShiftMask))
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diff_x = 0;
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/* if just the shift key is down, affect only the width */
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else if (transform_core->state & ShiftMask && ! (transform_core->state & ControlMask))
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diff_y = 0;
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*x1 += diff_x;
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*y1 += diff_y;
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if (dir_x > 0)
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{
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if (*x1 >= *x2) *x1 = *x2 - 1;
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}
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else
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{
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if (*x1 <= *x2) *x1 = *x2 + 1;
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}
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if (dir_y > 0)
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{
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if (*y1 >= *y2) *y1 = *y2 - 1;
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}
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else
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{
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if (*y1 <= *y2) *y1 = *y2 + 1;
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}
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/* if both the control key & shift keys are down, keep the aspect ratio intact */
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if (transform_core->state & GDK_CONTROL_MASK && transform_core->state & GDK_SHIFT_MASK)
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{
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ratio = (double) (transform_core->x2 - transform_core->x1) /
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(double) (transform_core->y2 - transform_core->y1);
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w = ABS ((*x2 - *x1));
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h = ABS ((*y2 - *y1));
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if (w > h * ratio)
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h = w / ratio;
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else
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w = h * ratio;
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*y1 = *y2 - dir_y * h;
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*x1 = *x2 - dir_x * w;
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}
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}
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static void *
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scale_tool_recalc (tool, gdisp_ptr)
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Tool * tool;
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void * gdisp_ptr;
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{
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TransformCore * transform_core;
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GDisplay * gdisp;
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int x1, y1, x2, y2;
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int diffx, diffy;
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int cx, cy;
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double scalex, scaley;
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gdisp = (GDisplay *) tool->gdisp_ptr;
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transform_core = (TransformCore *) tool->private;
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x1 = (int) transform_core->trans_info [X1];
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y1 = (int) transform_core->trans_info [Y1];
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x2 = (int) transform_core->trans_info [X2];
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y2 = (int) transform_core->trans_info [Y2];
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scalex = scaley = 1.0;
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if (transform_core->x2 - transform_core->x1)
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scalex = (double) (x2 - x1) / (double) (transform_core->x2 - transform_core->x1);
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if (transform_core->y2 - transform_core->y1)
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scaley = (double) (y2 - y1) / (double) (transform_core->y2 - transform_core->y1);
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switch (transform_core->function)
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{
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case HANDLE_1 :
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cx = x2; cy = y2;
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diffx = x2 - transform_core->x2;
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diffy = y2 - transform_core->y2;
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break;
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case HANDLE_2 :
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cx = x1; cy = y2;
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diffx = x1 - transform_core->x1;
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diffy = y2 - transform_core->y2;
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break;
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case HANDLE_3 :
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cx = x2; cy = y1;
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diffx = x2 - transform_core->x2;
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diffy = y1 - transform_core->y1;
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break;
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case HANDLE_4 :
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cx = x1; cy = y1;
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diffx = x1 - transform_core->x1;
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diffy = y1 - transform_core->y1;
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break;
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default :
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cx = x1; cy = y1;
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diffx = diffy = 0;
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break;
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}
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/* assemble the transformation matrix */
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gimp_matrix_identity (transform_core->transform);
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gimp_matrix_translate (transform_core->transform, (double) -cx + diffx, (double) -cy + diffy);
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gimp_matrix_scale (transform_core->transform, scalex, scaley);
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gimp_matrix_translate (transform_core->transform, (double) cx, (double) cy);
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/* transform the bounding box */
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transform_bounding_box (tool);
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/* update the information dialog */
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scale_info_update (tool);
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return (void *) 1;
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}
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static void *
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scale_tool_scale (gimage, drawable, trans_info, float_tiles, interpolation, matrix)
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GImage *gimage;
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GimpDrawable *drawable;
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double *trans_info;
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TileManager *float_tiles;
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int interpolation;
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GimpMatrix matrix;
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{
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return transform_core_do (gimage, drawable, float_tiles, interpolation, matrix);
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}
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/* The scale procedure definition */
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ProcArg scale_args[] =
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{
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{ PDB_DRAWABLE,
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"drawable",
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"the affected drawable"
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},
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{ PDB_INT32,
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"interpolation",
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"whether to use interpolation"
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},
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{ PDB_FLOAT,
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"x1",
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"the x coordinate of the upper-left corner of newly scaled region"
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},
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{ PDB_FLOAT,
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"y1",
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"the y coordinate of the upper-left corner of newly scaled region"
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},
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{ PDB_FLOAT,
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"x2",
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"the x coordinate of the lower-right corner of newly scaled region"
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},
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{ PDB_FLOAT,
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"y2",
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"the y coordinate of the lower-right corner of newly scaled region"
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}
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};
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ProcArg scale_out_args[] =
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{
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{ PDB_DRAWABLE,
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"drawable",
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"the scaled drawable"
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}
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};
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ProcRecord scale_proc =
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{
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"gimp_scale",
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"Scale the specified drawable",
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"This tool scales the specified drawable if no selection exists. If a selection exists, the portion of the drawable which lies under the selection is cut from the drawable and made into a floating selection which is then scaled by the specified amount. The interpolation parameter can be set to TRUE to indicate that either linear or cubic interpolation should be used to smooth the resulting scaled drawable. The return value is the ID of the scaled drawable. If there was no selection, this will be equal to the drawable ID supplied as input. Otherwise, this will be the newly created and scaled drawable.",
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"Spencer Kimball & Peter Mattis",
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"Spencer Kimball & Peter Mattis",
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"1995-1996",
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PDB_INTERNAL,
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/* Input arguments */
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6,
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scale_args,
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/* Output arguments */
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1,
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scale_out_args,
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/* Exec method */
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{ { scale_invoker } },
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};
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static Argument *
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scale_invoker (args)
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Argument *args;
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{
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int success = TRUE;
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GImage *gimage;
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GimpDrawable *drawable;
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int interpolation;
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double trans_info[4];
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int int_value;
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TileManager *float_tiles;
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TileManager *new_tiles;
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GimpMatrix matrix;
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int new_layer;
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Layer *layer;
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Argument *return_args;
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drawable = NULL;
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layer = NULL;
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/* the drawable */
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if (success)
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{
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int_value = args[0].value.pdb_int;
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drawable = drawable_get_ID (int_value);
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if (drawable == NULL)
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success = FALSE;
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else
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gimage = drawable_gimage (drawable);
|
|
}
|
|
/* interpolation */
|
|
if (success)
|
|
{
|
|
int_value = args[1].value.pdb_int;
|
|
interpolation = (int_value) ? TRUE : FALSE;
|
|
}
|
|
/* scale extents */
|
|
if (success)
|
|
{
|
|
trans_info[X1] = args[2].value.pdb_float;
|
|
trans_info[Y1] = args[3].value.pdb_float;
|
|
trans_info[X2] = args[4].value.pdb_float;
|
|
trans_info[Y2] = args[5].value.pdb_float;
|
|
|
|
if (trans_info[X1] >= trans_info[X2] ||
|
|
trans_info[Y1] >= trans_info[Y2])
|
|
success = FALSE;
|
|
}
|
|
|
|
/* call the scale procedure */
|
|
if (success)
|
|
{
|
|
double scalex, scaley;
|
|
|
|
/* Start a transform undo group */
|
|
undo_push_group_start (gimage, TRANSFORM_CORE_UNDO);
|
|
|
|
/* Cut/Copy from the specified drawable */
|
|
float_tiles = transform_core_cut (gimage, drawable, &new_layer);
|
|
|
|
scalex = scaley = 1.0;
|
|
if (float_tiles->width)
|
|
scalex = (trans_info[X2] - trans_info[X1]) / (double) float_tiles->width;
|
|
if (float_tiles->height)
|
|
scaley = (trans_info[Y2] - trans_info[Y1]) / (double) float_tiles->height;
|
|
|
|
/* assemble the transformation matrix */
|
|
gimp_matrix_identity (matrix);
|
|
gimp_matrix_translate (matrix, float_tiles->x, float_tiles->y);
|
|
gimp_matrix_scale (matrix, scalex, scaley);
|
|
gimp_matrix_translate (matrix, trans_info[X1], trans_info[Y1]);
|
|
|
|
/* scale the buffer */
|
|
new_tiles = scale_tool_scale (gimage, drawable, trans_info,
|
|
float_tiles, interpolation, matrix);
|
|
|
|
/* free the cut/copied buffer */
|
|
tile_manager_destroy (float_tiles);
|
|
|
|
if (new_tiles)
|
|
success = (layer = transform_core_paste (gimage, drawable, new_tiles, new_layer)) != NULL;
|
|
else
|
|
success = FALSE;
|
|
|
|
/* push the undo group end */
|
|
undo_push_group_end (gimage);
|
|
}
|
|
|
|
return_args = procedural_db_return_args (&scale_proc, success);
|
|
|
|
if (success)
|
|
return_args[1].value.pdb_int = drawable_ID (GIMP_DRAWABLE(layer));
|
|
|
|
return return_args;
|
|
}
|