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- /* The GIMP -- an image manipulation program
- * Copyright (C) 1995 Spencer Kimball and Peter Mattis
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
- #include "config.h"
-
- #include <glib.h>
-
- #include "apptypes.h"
-
- #include "appenv.h"
- #include "drawable.h"
- #include "gdisplay.h"
- #include "gimage_mask.h"
- #include "info_dialog.h"
- #include "scale_tool.h"
- #include "selection.h"
- #include "transform_tool.h"
- #include "undo.h"
-
- #include "tile_manager_pvt.h"
-
- #include "libgimp/gimpmath.h"
- #include "libgimp/gimplimits.h"
- #include "libgimp/gimpintl.h"
-
-
- /* storage for information dialog fields */
- static gchar orig_width_buf[MAX_INFO_BUF];
- static gchar orig_height_buf[MAX_INFO_BUF];
- static gdouble size_vals[2];
- static gchar x_ratio_buf[MAX_INFO_BUF];
- static gchar y_ratio_buf[MAX_INFO_BUF];
-
- /* needed for original size unit update */
- static GtkWidget *sizeentry;
-
- /* forward function declarations */
- static void scale_tool_recalc (Tool *, void *);
- static void scale_tool_motion (Tool *, void *);
- static void scale_info_update (Tool *);
-
- /* callback functions for the info dialog fields */
- static void scale_size_changed (GtkWidget *widget, gpointer data);
- static void scale_unit_changed (GtkWidget *widget, gpointer data);
-
- TileManager *
- scale_tool_transform (Tool *tool,
- gpointer gdisp_ptr,
- TransformState state)
- {
- GDisplay *gdisp;
- TransformCore *transform_core;
- GtkWidget *spinbutton;
-
- gdisp = (GDisplay *) gdisp_ptr;
- transform_core = (TransformCore *) tool->private;
-
- switch (state)
- {
- case INIT:
- size_vals[0] = transform_core->x2 - transform_core->x1;
- size_vals[1] = transform_core->y2 - transform_core->y1;
-
- if (!transform_info)
- {
- transform_info = info_dialog_new (_("Scaling Information"),
- gimp_standard_help_func,
- "tools/transform_scale.html");
-
- info_dialog_add_label (transform_info, _("Original Width:"),
- orig_width_buf);
- info_dialog_add_label (transform_info, _("Height:"),
- orig_height_buf);
-
- spinbutton =
- info_dialog_add_spinbutton (transform_info, _("Current Width:"),
- NULL, -1, 1, 1, 10, 1, 1, 2, NULL, NULL);
- sizeentry =
- info_dialog_add_sizeentry (transform_info, _("Height:"),
- size_vals, 1,
- gdisp->gimage->unit, "%a",
- TRUE, TRUE, FALSE,
- GIMP_SIZE_ENTRY_UPDATE_SIZE,
- scale_size_changed, tool);
- gtk_signal_connect (GTK_OBJECT (sizeentry), "unit_changed",
- scale_unit_changed, tool);
-
- gimp_size_entry_add_field (GIMP_SIZE_ENTRY (sizeentry),
- GTK_SPIN_BUTTON (spinbutton), NULL);
-
- info_dialog_add_label (transform_info, _("Scale Ratio X:"),
- x_ratio_buf);
- info_dialog_add_label (transform_info, _("Y:"),
- y_ratio_buf);
-
- gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
- 1, 4);
- gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
- 2, 0);
- }
-
- gtk_signal_handler_block_by_data (GTK_OBJECT (sizeentry), tool);
-
- gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry),
- gdisp->gimage->unit);
- if (gdisp->dot_for_dot)
- gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry), GIMP_UNIT_PIXEL);
-
- gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 0,
- gdisp->gimage->xresolution, FALSE);
- gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 1,
- gdisp->gimage->yresolution, FALSE);
-
- gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 0,
- GIMP_MIN_IMAGE_SIZE,
- GIMP_MAX_IMAGE_SIZE);
- gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 1,
- GIMP_MIN_IMAGE_SIZE,
- GIMP_MAX_IMAGE_SIZE);
-
- gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 0,
- 0, size_vals[0]);
- gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 1,
- 0, size_vals[1]);
-
- gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 0,
- size_vals[0]);
- gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 1,
- size_vals[1]);
-
- gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), TRUE);
-
- gtk_signal_handler_unblock_by_data (GTK_OBJECT (sizeentry), tool);
-
- transform_core->trans_info [X0] = (double) transform_core->x1;
- transform_core->trans_info [Y0] = (double) transform_core->y1;
- transform_core->trans_info [X1] = (double) transform_core->x2;
- transform_core->trans_info [Y1] = (double) transform_core->y2;
-
- return NULL;
- break;
-
- case MOTION:
- scale_tool_motion (tool, gdisp_ptr);
- scale_tool_recalc (tool, gdisp_ptr);
- break;
-
- case RECALC:
- scale_tool_recalc (tool, gdisp_ptr);
- break;
-
- case FINISH:
- gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), FALSE);
- return scale_tool_scale (gdisp->gimage,
- gimage_active_drawable (gdisp->gimage),
- gdisp,
- transform_core->trans_info,
- transform_core->original,
- transform_tool_smoothing (),
- transform_core->transform);
- break;
- }
-
- return NULL;
- }
-
- Tool *
- tools_new_scale_tool (void)
- {
- Tool *tool;
- TransformCore *private;
-
- tool = transform_core_new (SCALE, TRUE);
-
- private = tool->private;
-
- /* set the scale specific transformation attributes */
- private->trans_func = scale_tool_transform;
- private->trans_info[X0] = 0.0;
- private->trans_info[Y0] = 0.0;
- private->trans_info[X1] = 0.0;
- private->trans_info[Y1] = 0.0;
-
- /* assemble the transformation matrix */
- gimp_matrix3_identity (private->transform);
-
- return tool;
- }
-
- void
- tools_free_scale_tool (Tool *tool)
- {
- transform_core_free (tool);
- }
-
- static void
- scale_info_update (Tool *tool)
- {
- GDisplay *gdisp;
- TransformCore *transform_core;
- gdouble ratio_x, ratio_y;
- gint x1, y1, x2, y2, x3, y3, x4, y4;
- GimpUnit unit;
- gdouble unit_factor;
- gchar format_buf[16];
-
- static GimpUnit label_unit = GIMP_UNIT_PIXEL;
-
- gdisp = (GDisplay *) tool->gdisp_ptr;
- transform_core = (TransformCore *) tool->private;
- unit = gimp_size_entry_get_unit (GIMP_SIZE_ENTRY (sizeentry));;
-
- /* Find original sizes */
- x1 = transform_core->x1;
- y1 = transform_core->y1;
- x2 = transform_core->x2;
- y2 = transform_core->y2;
-
- if (unit != GIMP_UNIT_PERCENT)
- label_unit = unit;
-
- unit_factor = gimp_unit_get_factor (label_unit);
-
- if (label_unit) /* unit != GIMP_UNIT_PIXEL */
- {
- g_snprintf (format_buf, sizeof (format_buf), "%%.%df %s",
- gimp_unit_get_digits (label_unit) + 1,
- gimp_unit_get_symbol (label_unit));
- g_snprintf (orig_width_buf, MAX_INFO_BUF, format_buf,
- (x2 - x1) * unit_factor / gdisp->gimage->xresolution);
- g_snprintf (orig_height_buf, MAX_INFO_BUF, format_buf,
- (y2 - y1) * unit_factor / gdisp->gimage->yresolution);
- }
- else /* unit == GIMP_UNIT_PIXEL */
- {
- g_snprintf (orig_width_buf, MAX_INFO_BUF, "%d", x2 - x1);
- g_snprintf (orig_height_buf, MAX_INFO_BUF, "%d", y2 - y1);
- }
-
- /* Find current sizes */
- x3 = (int) transform_core->trans_info [X0];
- y3 = (int) transform_core->trans_info [Y0];
- x4 = (int) transform_core->trans_info [X1];
- y4 = (int) transform_core->trans_info [Y1];
-
- size_vals[0] = x4 - x3;
- size_vals[1] = y4 - y3;
-
- ratio_x = ratio_y = 0.0;
-
- if (x2 - x1)
- ratio_x = (double) (x4 - x3) / (double) (x2 - x1);
- if (y2 - y1)
- ratio_y = (double) (y4 - y3) / (double) (y2 - y1);
-
- g_snprintf (x_ratio_buf, MAX_INFO_BUF, "%0.2f", ratio_x);
- g_snprintf (y_ratio_buf, MAX_INFO_BUF, "%0.2f", ratio_y);
-
- info_dialog_update (transform_info);
- info_dialog_popup (transform_info);
- }
-
- static void
- scale_size_changed (GtkWidget *widget,
- gpointer data)
- {
- Tool *tool;
- TransformCore *transform_core;
- GDisplay *gdisp;
- gint width;
- gint height;
-
- tool = (Tool *)data;
-
- if (tool)
- {
- gdisp = (GDisplay *) tool->gdisp_ptr;
- transform_core = (TransformCore *) tool->private;
-
- width = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0));
- height = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1));
-
- if ((width != (transform_core->trans_info[X1] -
- transform_core->trans_info[X0])) ||
- (height != (transform_core->trans_info[Y1] -
- transform_core->trans_info[Y0])))
- {
- draw_core_pause (transform_core->core, tool);
- transform_core->trans_info[X1] =
- transform_core->trans_info[X0] + width;
- transform_core->trans_info[Y1] =
- transform_core->trans_info[Y0] + height;
- scale_tool_recalc (tool, gdisp);
- draw_core_resume (transform_core->core, tool);
- }
- }
- }
-
- static void
- scale_unit_changed (GtkWidget *widget,
- gpointer data)
- {
- scale_info_update ((Tool *) data);
- }
-
- static void
- scale_tool_motion (Tool *tool,
- void *gdisp_ptr)
- {
- GDisplay *gdisp;
- TransformCore *transform_core;
- gdouble ratio;
- gdouble *x1;
- gdouble *y1;
- gdouble *x2;
- gdouble *y2;
- gint w, h;
- gint dir_x, dir_y;
- gint diff_x, diff_y;
-
- gdisp = (GDisplay *) gdisp_ptr;
- transform_core = (TransformCore *) tool->private;
-
- diff_x = transform_core->curx - transform_core->lastx;
- diff_y = transform_core->cury - transform_core->lasty;
-
- switch (transform_core->function)
- {
- case HANDLE_1:
- x1 = &transform_core->trans_info [X0];
- y1 = &transform_core->trans_info [Y0];
- x2 = &transform_core->trans_info [X1];
- y2 = &transform_core->trans_info [Y1];
- dir_x = dir_y = 1;
- break;
- case HANDLE_2:
- x1 = &transform_core->trans_info [X1];
- y1 = &transform_core->trans_info [Y0];
- x2 = &transform_core->trans_info [X0];
- y2 = &transform_core->trans_info [Y1];
- dir_x = -1;
- dir_y = 1;
- break;
- case HANDLE_3:
- x1 = &transform_core->trans_info [X0];
- y1 = &transform_core->trans_info [Y1];
- x2 = &transform_core->trans_info [X1];
- y2 = &transform_core->trans_info [Y0];
- dir_x = 1;
- dir_y = -1;
- break;
- case HANDLE_4:
- x1 = &transform_core->trans_info [X1];
- y1 = &transform_core->trans_info [Y1];
- x2 = &transform_core->trans_info [X0];
- y2 = &transform_core->trans_info [Y0];
- dir_x = dir_y = -1;
- break;
- default :
- return;
- }
-
- /* if just the mod1 key is down, affect only the height */
- if (transform_core->state & GDK_MOD1_MASK &&
- ! (transform_core->state & GDK_CONTROL_MASK))
- diff_x = 0;
- /* if just the control key is down, affect only the width */
- else if (transform_core->state & GDK_CONTROL_MASK &&
- ! (transform_core->state & GDK_MOD1_MASK))
- diff_y = 0;
-
- *x1 += diff_x;
- *y1 += diff_y;
-
- if (dir_x > 0)
- {
- if (*x1 >= *x2) *x1 = *x2 - 1;
- }
- else
- {
- if (*x1 <= *x2) *x1 = *x2 + 1;
- }
-
- if (dir_y > 0)
- {
- if (*y1 >= *y2) *y1 = *y2 - 1;
- }
- else
- {
- if (*y1 <= *y2) *y1 = *y2 + 1;
- }
-
- /* if both the control key & mod1 keys are down,
- * keep the aspect ratio intact
- */
- if (transform_core->state & GDK_CONTROL_MASK &&
- transform_core->state & GDK_MOD1_MASK)
- {
- ratio = (double) (transform_core->x2 - transform_core->x1) /
- (double) (transform_core->y2 - transform_core->y1);
-
- w = ABS ((*x2 - *x1));
- h = ABS ((*y2 - *y1));
-
- if (w > h * ratio)
- h = w / ratio;
- else
- w = h * ratio;
-
- *y1 = *y2 - dir_y * h;
- *x1 = *x2 - dir_x * w;
- }
- }
-
- static void
- scale_tool_recalc (Tool *tool,
- void *gdisp_ptr)
- {
- TransformCore *transform_core;
- GDisplay *gdisp;
- gint x1, y1, x2, y2;
- gint diffx, diffy;
- gint cx, cy;
- gdouble scalex, scaley;
-
- gdisp = (GDisplay *) tool->gdisp_ptr;
- transform_core = (TransformCore *) tool->private;
-
- x1 = (int) transform_core->trans_info [X0];
- y1 = (int) transform_core->trans_info [Y0];
- x2 = (int) transform_core->trans_info [X1];
- y2 = (int) transform_core->trans_info [Y1];
-
- scalex = scaley = 1.0;
- if (transform_core->x2 - transform_core->x1)
- scalex = (double) (x2 - x1) / (double) (transform_core->x2 - transform_core->x1);
- if (transform_core->y2 - transform_core->y1)
- scaley = (double) (y2 - y1) / (double) (transform_core->y2 - transform_core->y1);
-
- switch (transform_core->function)
- {
- case HANDLE_1:
- cx = x2; cy = y2;
- diffx = x2 - transform_core->x2;
- diffy = y2 - transform_core->y2;
- break;
- case HANDLE_2:
- cx = x1; cy = y2;
- diffx = x1 - transform_core->x1;
- diffy = y2 - transform_core->y2;
- break;
- case HANDLE_3:
- cx = x2; cy = y1;
- diffx = x2 - transform_core->x2;
- diffy = y1 - transform_core->y1;
- break;
- case HANDLE_4:
- cx = x1; cy = y1;
- diffx = x1 - transform_core->x1;
- diffy = y1 - transform_core->y1;
- break;
- default :
- cx = x1; cy = y1;
- diffx = diffy = 0;
- break;
- }
-
- /* assemble the transformation matrix */
- gimp_matrix3_identity (transform_core->transform);
- gimp_matrix3_translate (transform_core->transform,
- (double) -cx + diffx, (double) -cy + diffy);
- gimp_matrix3_scale (transform_core->transform, scalex, scaley);
- gimp_matrix3_translate (transform_core->transform, (double) cx, (double) cy);
-
- /* transform the bounding box */
- transform_core_transform_bounding_box (tool);
-
- /* update the information dialog */
- scale_info_update (tool);
- }
-
- TileManager *
- scale_tool_scale (GImage *gimage,
- GimpDrawable *drawable,
- GDisplay *gdisp,
- gdouble *trans_info,
- TileManager *float_tiles,
- gboolean interpolation,
- GimpMatrix3 matrix)
- {
- gimp_progress *progress;
- TileManager *ret;
-
- progress = progress_start (gdisp, _("Scaling..."), FALSE, NULL, NULL);
-
- ret = transform_core_do (gimage, drawable, float_tiles,
- interpolation, matrix,
- progress ? progress_update_and_flush :
- (progress_func_t) NULL,
- progress);
-
- if (progress)
- progress_end (progress);
-
- return ret;
- }
-