mirror of https://github.com/GNOME/gimp.git
505 lines
14 KiB
C
505 lines
14 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 "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/gimplimits.h"
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#include "libgimp/gimpintl.h"
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/* storage for information dialog fields */
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static gchar orig_width_buf[MAX_INFO_BUF];
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static gchar orig_height_buf[MAX_INFO_BUF];
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static gdouble size_vals[2];
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static gchar x_ratio_buf[MAX_INFO_BUF];
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static gchar y_ratio_buf[MAX_INFO_BUF];
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/* needed for original size unit update */
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static GtkWidget *sizeentry;
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/* forward function declarations */
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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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/* callback functions for the info dialog fields */
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static void scale_size_changed (GtkWidget *w, gpointer data);
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static void scale_unit_changed (GtkWidget *w, gpointer data);
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void *
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scale_tool_transform (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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GtkWidget *spinbutton;
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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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size_vals[0] = transform_core->x2 - transform_core->x1;
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size_vals[1] = transform_core->y2 - transform_core->y1;
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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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tools_help_func, NULL);
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info_dialog_add_label (transform_info, _("Original Width:"),
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orig_width_buf);
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info_dialog_add_label (transform_info, _("Height:"),
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orig_height_buf);
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spinbutton =
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info_dialog_add_spinbutton (transform_info, _("Current Width:"),
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NULL, -1, 1, 1, 10, 1, 1, 2, NULL, NULL);
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sizeentry =
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info_dialog_add_sizeentry (transform_info, _("Height:"),
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size_vals, 1,
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gdisp->gimage->unit, "%a",
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TRUE, TRUE, FALSE,
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GIMP_SIZE_ENTRY_UPDATE_SIZE,
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scale_size_changed, tool);
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gtk_signal_connect (GTK_OBJECT (sizeentry), "unit_changed",
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scale_unit_changed, tool);
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gimp_size_entry_add_field (GIMP_SIZE_ENTRY (sizeentry),
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GTK_SPIN_BUTTON (spinbutton), NULL);
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info_dialog_add_label (transform_info, _("Scale Ratio X:"),
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x_ratio_buf);
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info_dialog_add_label (transform_info, _("Y:"),
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y_ratio_buf);
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gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
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1, 4);
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gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
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2, 0);
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}
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gtk_signal_handler_block_by_data (GTK_OBJECT (sizeentry), tool);
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gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry),
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gdisp->gimage->unit);
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if (gdisp->dot_for_dot)
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gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry), UNIT_PIXEL);
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gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 0,
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gdisp->gimage->xresolution, FALSE);
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gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 1,
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gdisp->gimage->yresolution, FALSE);
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gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 0,
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GIMP_MIN_IMAGE_SIZE,
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GIMP_MAX_IMAGE_SIZE);
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gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 1,
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GIMP_MIN_IMAGE_SIZE,
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GIMP_MAX_IMAGE_SIZE);
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gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 0,
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0, size_vals[0]);
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gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 1,
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0, size_vals[1]);
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gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 0,
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size_vals[0]);
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gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 1,
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size_vals[1]);
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gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), TRUE);
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gtk_signal_handler_unblock_by_data (GTK_OBJECT (sizeentry), tool);
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transform_core->trans_info [X0] = (double) transform_core->x1;
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transform_core->trans_info [Y0] = (double) transform_core->y1;
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transform_core->trans_info [X1] = (double) transform_core->x2;
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transform_core->trans_info [Y1] = (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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gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), FALSE);
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return scale_tool_scale (gdisp->gimage,
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gimage_active_drawable (gdisp->gimage),
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gdisp,
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transform_core->trans_info,
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transform_core->original,
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transform_tool_smoothing (),
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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 scale specific transformation attributes */
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private->trans_func = scale_tool_transform;
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private->trans_info[X0] = 0.0;
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private->trans_info[Y0] = 0.0;
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private->trans_info[X1] = 0.0;
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private->trans_info[Y1] = 0.0;
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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 *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 *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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GUnit unit;
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double unit_factor;
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gchar format_buf[16];
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static GUnit label_unit = UNIT_PIXEL;
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gdisp = (GDisplay *) tool->gdisp_ptr;
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transform_core = (TransformCore *) tool->private;
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unit = gimp_size_entry_get_unit (GIMP_SIZE_ENTRY (sizeentry));;
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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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if (unit != UNIT_PERCENT)
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label_unit = unit;
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unit_factor = gimp_unit_get_factor (label_unit);
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if (label_unit) /* unit != UNIT_PIXEL */
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{
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g_snprintf (format_buf, sizeof (format_buf), "%%.%df %s",
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gimp_unit_get_digits (label_unit) + 1,
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gimp_unit_get_symbol (label_unit));
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g_snprintf (orig_width_buf, MAX_INFO_BUF, format_buf,
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(x2 - x1) * unit_factor / gdisp->gimage->xresolution);
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g_snprintf (orig_height_buf, MAX_INFO_BUF, format_buf,
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(y2 - y1) * unit_factor / gdisp->gimage->yresolution);
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}
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else /* unit == UNIT_PIXEL */
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{
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g_snprintf (orig_width_buf, MAX_INFO_BUF, "%d", x2 - x1);
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g_snprintf (orig_height_buf, MAX_INFO_BUF, "%d", y2 - y1);
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}
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/* Find current sizes */
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x3 = (int) transform_core->trans_info [X0];
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y3 = (int) transform_core->trans_info [Y0];
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x4 = (int) transform_core->trans_info [X1];
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y4 = (int) transform_core->trans_info [Y1];
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size_vals[0] = x4 - x3;
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size_vals[1] = 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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g_snprintf (x_ratio_buf, MAX_INFO_BUF, "%0.2f", ratio_x);
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g_snprintf (y_ratio_buf, MAX_INFO_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_size_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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int width;
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int height;
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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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width = (int) (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (w), 0) + 0.5);
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height = (int) (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (w), 1) + 0.5);
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if ((width != (transform_core->trans_info[X1] -
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transform_core->trans_info[X0])) ||
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(height != (transform_core->trans_info[Y1] -
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transform_core->trans_info[Y0])))
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{
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draw_core_pause (transform_core->core, tool);
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transform_core->trans_info[X1] =
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transform_core->trans_info[X0] + width;
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transform_core->trans_info[Y1] =
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transform_core->trans_info[Y0] + height;
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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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}
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}
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static void
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scale_unit_changed (GtkWidget *w,
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gpointer data)
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{
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scale_info_update ((Tool*) data);
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}
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static void
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scale_tool_motion (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 [X0];
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y1 = &transform_core->trans_info [Y0];
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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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case HANDLE_2 :
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x1 = &transform_core->trans_info [X1];
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y1 = &transform_core->trans_info [Y0];
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x2 = &transform_core->trans_info [X0];
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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_3 :
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x1 = &transform_core->trans_info [X0];
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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 [Y0];
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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 [X1];
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y1 = &transform_core->trans_info [Y1];
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x2 = &transform_core->trans_info [X0];
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y2 = &transform_core->trans_info [Y0];
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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 mod1 key is down, affect only the height */
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if (transform_core->state & GDK_MOD1_MASK && ! (transform_core->state & GDK_CONTROL_MASK))
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diff_x = 0;
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/* if just the control key is down, affect only the width */
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else if (transform_core->state & GDK_CONTROL_MASK && ! (transform_core->state & GDK_MOD1_MASK))
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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 & mod1 keys are down, keep the aspect ratio intact */
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if (transform_core->state & GDK_CONTROL_MASK && transform_core->state & GDK_MOD1_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 *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 [X0];
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y1 = (int) transform_core->trans_info [Y0];
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x2 = (int) transform_core->trans_info [X1];
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y2 = (int) transform_core->trans_info [Y1];
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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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void *
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scale_tool_scale (GImage *gimage,
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GimpDrawable *drawable,
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GDisplay *gdisp,
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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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void *ret;
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gimp_progress *progress;
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progress = progress_start (gdisp, _("Scaling..."), FALSE, NULL, NULL);
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ret = transform_core_do (gimage, drawable, float_tiles,
|
|
interpolation, matrix,
|
|
progress? progress_update_and_flush:NULL, progress);
|
|
if (progress)
|
|
progress_end (progress);
|
|
|
|
return ret;
|
|
}
|