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-rw-r--r--app/tools/gimpscaletool.c474
1 files changed, 474 insertions, 0 deletions
diff --git a/app/tools/gimpscaletool.c b/app/tools/gimpscaletool.c
new file mode 100644
index 0000000..b7fcd96
--- /dev/null
+++ b/app/tools/gimpscaletool.c
@@ -0,0 +1,474 @@
+/* GIMP - The GNU 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpmath/gimpmath.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "tools-types.h"
+
+#include "core/gimp-transform-utils.h"
+#include "core/gimpimage.h"
+
+#include "widgets/gimphelp-ids.h"
+#include "widgets/gimpsizebox.h"
+
+#include "display/gimpdisplay.h"
+#include "display/gimpdisplayshell.h"
+#include "display/gimpdisplayshell-transform.h"
+#include "display/gimptoolgui.h"
+#include "display/gimptooltransformgrid.h"
+
+#include "gimpscaletool.h"
+#include "gimptoolcontrol.h"
+#include "gimptransformgridoptions.h"
+
+#include "gimp-intl.h"
+
+
+#define EPSILON 1e-6
+
+
+/* index into trans_info array */
+enum
+{
+ X0,
+ Y0,
+ X1,
+ Y1
+};
+
+
+/* local function prototypes */
+
+static gboolean gimp_scale_tool_info_to_matrix (GimpTransformGridTool *tg_tool,
+ GimpMatrix3 *transform);
+static void gimp_scale_tool_matrix_to_info (GimpTransformGridTool *tg_tool,
+ const GimpMatrix3 *transform);
+static gchar * gimp_scale_tool_get_undo_desc (GimpTransformGridTool *tg_tool);
+static void gimp_scale_tool_dialog (GimpTransformGridTool *tg_tool);
+static void gimp_scale_tool_dialog_update (GimpTransformGridTool *tg_tool);
+static void gimp_scale_tool_prepare (GimpTransformGridTool *tg_tool);
+static void gimp_scale_tool_readjust (GimpTransformGridTool *tg_tool);
+static GimpToolWidget * gimp_scale_tool_get_widget (GimpTransformGridTool *tg_tool);
+static void gimp_scale_tool_update_widget (GimpTransformGridTool *tg_tool);
+static void gimp_scale_tool_widget_changed (GimpTransformGridTool *tg_tool);
+
+static void gimp_scale_tool_size_notify (GtkWidget *box,
+ GParamSpec *pspec,
+ GimpTransformGridTool *tg_tool);
+
+
+G_DEFINE_TYPE (GimpScaleTool, gimp_scale_tool, GIMP_TYPE_TRANSFORM_GRID_TOOL)
+
+#define parent_class gimp_scale_tool_parent_class
+
+
+void
+gimp_scale_tool_register (GimpToolRegisterCallback callback,
+ gpointer data)
+{
+ (* callback) (GIMP_TYPE_SCALE_TOOL,
+ GIMP_TYPE_TRANSFORM_GRID_OPTIONS,
+ gimp_transform_grid_options_gui,
+ GIMP_CONTEXT_PROP_MASK_BACKGROUND,
+ "gimp-scale-tool",
+ _("Scale"),
+ _("Scale Tool: Scale the layer, selection or path"),
+ N_("_Scale"), "<shift>S",
+ NULL, GIMP_HELP_TOOL_SCALE,
+ GIMP_ICON_TOOL_SCALE,
+ data);
+}
+
+static void
+gimp_scale_tool_class_init (GimpScaleToolClass *klass)
+{
+ GimpTransformToolClass *tr_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
+ GimpTransformGridToolClass *tg_class = GIMP_TRANSFORM_GRID_TOOL_CLASS (klass);
+
+ tg_class->info_to_matrix = gimp_scale_tool_info_to_matrix;
+ tg_class->matrix_to_info = gimp_scale_tool_matrix_to_info;
+ tg_class->get_undo_desc = gimp_scale_tool_get_undo_desc;
+ tg_class->dialog = gimp_scale_tool_dialog;
+ tg_class->dialog_update = gimp_scale_tool_dialog_update;
+ tg_class->prepare = gimp_scale_tool_prepare;
+ tg_class->readjust = gimp_scale_tool_readjust;
+ tg_class->get_widget = gimp_scale_tool_get_widget;
+ tg_class->update_widget = gimp_scale_tool_update_widget;
+ tg_class->widget_changed = gimp_scale_tool_widget_changed;
+
+ tr_class->undo_desc = C_("undo-type", "Scale");
+ tr_class->progress_text = _("Scaling");
+ tg_class->ok_button_label = _("_Scale");
+}
+
+static void
+gimp_scale_tool_init (GimpScaleTool *scale_tool)
+{
+ GimpTool *tool = GIMP_TOOL (scale_tool);
+
+ gimp_tool_control_set_tool_cursor (tool->control, GIMP_TOOL_CURSOR_RESIZE);
+}
+
+static gboolean
+gimp_scale_tool_info_to_matrix (GimpTransformGridTool *tg_tool,
+ GimpMatrix3 *transform)
+{
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+
+ gimp_matrix3_identity (transform);
+ gimp_transform_matrix_scale (transform,
+ tr_tool->x1,
+ tr_tool->y1,
+ tr_tool->x2 - tr_tool->x1,
+ tr_tool->y2 - tr_tool->y1,
+ tg_tool->trans_info[X0],
+ tg_tool->trans_info[Y0],
+ tg_tool->trans_info[X1] - tg_tool->trans_info[X0],
+ tg_tool->trans_info[Y1] - tg_tool->trans_info[Y0]);
+
+ return TRUE;
+}
+
+static void
+gimp_scale_tool_matrix_to_info (GimpTransformGridTool *tg_tool,
+ const GimpMatrix3 *transform)
+{
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+ gdouble x;
+ gdouble y;
+ gdouble w;
+ gdouble h;
+
+ x = transform->coeff[0][2];
+ y = transform->coeff[1][2];
+ w = transform->coeff[0][0];
+ h = transform->coeff[1][1];
+
+ tg_tool->trans_info[X0] = x + w * tr_tool->x1;
+ tg_tool->trans_info[Y0] = y + h * tr_tool->y1;
+ tg_tool->trans_info[X1] = tg_tool->trans_info[X0] +
+ w * (tr_tool->x2 - tr_tool->x1);
+ tg_tool->trans_info[Y1] = tg_tool->trans_info[Y0] +
+ h * (tr_tool->y2 - tr_tool->y1);
+}
+
+static gchar *
+gimp_scale_tool_get_undo_desc (GimpTransformGridTool *tg_tool)
+{
+ gint width;
+ gint height;
+
+ width = ROUND (tg_tool->trans_info[X1] - tg_tool->trans_info[X0]);
+ height = ROUND (tg_tool->trans_info[Y1] - tg_tool->trans_info[Y0]);
+
+ return g_strdup_printf (C_("undo-type", "Scale to %d x %d"),
+ width, height);
+}
+
+static void
+gimp_scale_tool_dialog (GimpTransformGridTool *tg_tool)
+{
+}
+
+static void
+gimp_scale_tool_dialog_update (GimpTransformGridTool *tg_tool)
+{
+ GimpTransformGridOptions *options = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
+ gint width;
+ gint height;
+
+ width = ROUND (tg_tool->trans_info[X1] - tg_tool->trans_info[X0]);
+ height = ROUND (tg_tool->trans_info[Y1] - tg_tool->trans_info[Y0]);
+
+ g_object_set (GIMP_SCALE_TOOL (tg_tool)->box,
+ "width", width,
+ "height", height,
+ "keep-aspect", options->constrain_scale,
+ NULL);
+}
+
+static void
+gimp_scale_tool_prepare (GimpTransformGridTool *tg_tool)
+{
+ GimpScaleTool *scale = GIMP_SCALE_TOOL (tg_tool);
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+ GimpTransformGridOptions *options = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
+ GimpDisplay *display = GIMP_TOOL (tg_tool)->display;
+ gdouble xres;
+ gdouble yres;
+
+ tg_tool->trans_info[X0] = (gdouble) tr_tool->x1;
+ tg_tool->trans_info[Y0] = (gdouble) tr_tool->y1;
+ tg_tool->trans_info[X1] = (gdouble) tr_tool->x2;
+ tg_tool->trans_info[Y1] = (gdouble) tr_tool->y2;
+
+ gimp_image_get_resolution (gimp_display_get_image (display),
+ &xres, &yres);
+
+ if (scale->box)
+ {
+ g_signal_handlers_disconnect_by_func (scale->box,
+ gimp_scale_tool_size_notify,
+ tg_tool);
+ gtk_widget_destroy (scale->box);
+ }
+
+ /* Need to create a new GimpSizeBox widget because the initial
+ * width and height is what counts as 100%.
+ */
+ scale->box =
+ g_object_new (GIMP_TYPE_SIZE_BOX,
+ "width", tr_tool->x2 - tr_tool->x1,
+ "height", tr_tool->y2 - tr_tool->y1,
+ "keep-aspect", options->constrain_scale,
+ "unit", gimp_display_get_shell (display)->unit,
+ "xresolution", xres,
+ "yresolution", yres,
+ NULL);
+
+ gtk_box_pack_start (GTK_BOX (gimp_tool_gui_get_vbox (tg_tool->gui)),
+ scale->box, FALSE, FALSE, 0);
+ gtk_widget_show (scale->box);
+
+ g_signal_connect (scale->box, "notify",
+ G_CALLBACK (gimp_scale_tool_size_notify),
+ tg_tool);
+}
+
+static void
+gimp_scale_tool_readjust (GimpTransformGridTool *tg_tool)
+{
+ GimpTool *tool = GIMP_TOOL (tg_tool);
+ GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
+ gdouble x;
+ gdouble y;
+ gdouble r;
+
+ x = shell->disp_width / 2.0;
+ y = shell->disp_height / 2.0;
+ r = MAX (MIN (x, y) / G_SQRT2 -
+ GIMP_TOOL_TRANSFORM_GRID_MAX_HANDLE_SIZE / 2.0,
+ GIMP_TOOL_TRANSFORM_GRID_MAX_HANDLE_SIZE / 2.0);
+
+ gimp_display_shell_untransform_xy_f (shell,
+ x, y,
+ &x, &y);
+
+ tg_tool->trans_info[X0] = RINT (x - FUNSCALEX (shell, r));
+ tg_tool->trans_info[Y0] = RINT (y - FUNSCALEY (shell, r));
+ tg_tool->trans_info[X1] = RINT (x + FUNSCALEX (shell, r));
+ tg_tool->trans_info[Y1] = RINT (y + FUNSCALEY (shell, r));
+}
+
+static GimpToolWidget *
+gimp_scale_tool_get_widget (GimpTransformGridTool *tg_tool)
+{
+ GimpTool *tool = GIMP_TOOL (tg_tool);
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+ GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
+ GimpToolWidget *widget;
+
+ widget = gimp_tool_transform_grid_new (shell,
+ &tr_tool->transform,
+ tr_tool->x1,
+ tr_tool->y1,
+ tr_tool->x2,
+ tr_tool->y2);
+
+ g_object_set (widget,
+ "inside-function", GIMP_TRANSFORM_FUNCTION_SCALE,
+ "outside-function", GIMP_TRANSFORM_FUNCTION_SCALE,
+ "use-corner-handles", TRUE,
+ "use-side-handles", TRUE,
+ "use-center-handle", TRUE,
+ NULL);
+
+ return widget;
+}
+
+static void
+gimp_scale_tool_update_widget (GimpTransformGridTool *tg_tool)
+{
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+
+ GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->update_widget (tg_tool);
+
+ g_object_set (
+ tg_tool->widget,
+ "x1", (gdouble) tr_tool->x1,
+ "y1", (gdouble) tr_tool->y1,
+ "x2", (gdouble) tr_tool->x2,
+ "y2", (gdouble) tr_tool->y2,
+ NULL);
+}
+
+static void
+gimp_scale_tool_widget_changed (GimpTransformGridTool *tg_tool)
+{
+ GimpTool *tool = GIMP_TOOL (tg_tool);
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+ GimpMatrix3 *transform;
+ gdouble x0, y0;
+ gdouble x1, y1;
+ gint width, height;
+
+ g_object_get (tg_tool->widget,
+ "transform", &transform,
+ NULL);
+
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x1, tr_tool->y1,
+ &x0, &y0);
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x2, tr_tool->y2,
+ &x1, &y1);
+
+ g_free (transform);
+
+ width = ROUND (x1 - x0);
+ height = ROUND (y1 - y0);
+
+ if (width > 0)
+ {
+ tg_tool->trans_info[X0] = x0;
+ tg_tool->trans_info[X1] = x1;
+ }
+ else if (fabs (x0 - tg_tool->trans_info[X0]) < EPSILON)
+ {
+ tg_tool->trans_info[X1] = tg_tool->trans_info[X0] + 1.0;
+ }
+ else if (fabs (x1 - tg_tool->trans_info[X1]) < EPSILON)
+ {
+ tg_tool->trans_info[X0] = tg_tool->trans_info[X1] - 1.0;
+ }
+ else
+ {
+ tg_tool->trans_info[X0] = (x0 + x1) / 2.0 - 0.5;
+ tg_tool->trans_info[X1] = (x0 + x1) / 2.0 + 0.5;
+ }
+
+ if (height > 0)
+ {
+ tg_tool->trans_info[Y0] = y0;
+ tg_tool->trans_info[Y1] = y1;
+ }
+ else if (fabs (y0 - tg_tool->trans_info[Y0]) < EPSILON)
+ {
+ tg_tool->trans_info[Y1] = tg_tool->trans_info[Y0] + 1.0;
+ }
+ else if (fabs (y1 - tg_tool->trans_info[Y1]) < EPSILON)
+ {
+ tg_tool->trans_info[Y0] = tg_tool->trans_info[Y1] - 1.0;
+ }
+ else
+ {
+ tg_tool->trans_info[Y0] = (y0 + y1) / 2.0 - 0.5;
+ tg_tool->trans_info[Y1] = (y0 + y1) / 2.0 + 0.5;
+ }
+
+ if (width <= 0 || height <= 0)
+ gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
+
+ GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->widget_changed (tg_tool);
+}
+
+static void
+gimp_scale_tool_size_notify (GtkWidget *box,
+ GParamSpec *pspec,
+ GimpTransformGridTool *tg_tool)
+{
+ GimpTransformGridOptions *options = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
+
+ if (! strcmp (pspec->name, "width") ||
+ ! strcmp (pspec->name, "height"))
+ {
+ gint width;
+ gint height;
+ gint old_width;
+ gint old_height;
+
+ g_object_get (box,
+ "width", &width,
+ "height", &height,
+ NULL);
+
+ old_width = ROUND (tg_tool->trans_info[X1] - tg_tool->trans_info[X0]);
+ old_height = ROUND (tg_tool->trans_info[Y1] - tg_tool->trans_info[Y0]);
+
+ if ((width != old_width) || (height != old_height))
+ {
+ GimpTool *tool = GIMP_TOOL (tg_tool);
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+
+ if (options->frompivot_scale)
+ {
+ gdouble center_x;
+ gdouble center_y;
+
+ center_x = (tg_tool->trans_info[X0] +
+ tg_tool->trans_info[X1]) / 2.0;
+ center_y = (tg_tool->trans_info[Y0] +
+ tg_tool->trans_info[Y1]) / 2.0;
+
+ tg_tool->trans_info[X0] = center_x - width / 2.0;
+ tg_tool->trans_info[Y0] = center_y - height / 2.0;
+ tg_tool->trans_info[X1] = center_x + width / 2.0;
+ tg_tool->trans_info[Y1] = center_y + height / 2.0;
+ }
+ else
+ {
+ tg_tool->trans_info[X1] = tg_tool->trans_info[X0] + width;
+ tg_tool->trans_info[Y1] = tg_tool->trans_info[Y0] + height;
+ }
+
+ gimp_transform_grid_tool_push_internal_undo (tg_tool, TRUE);
+
+ gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
+ }
+ }
+ else if (! strcmp (pspec->name, "keep-aspect"))
+ {
+ gboolean constrain;
+
+ g_object_get (box,
+ "keep-aspect", &constrain,
+ NULL);
+
+ if (constrain != options->constrain_scale)
+ {
+ gint width;
+ gint height;
+
+ g_object_get (box,
+ "width", &width,
+ "height", &height,
+ NULL);
+
+ g_object_set (options,
+ "constrain-scale", constrain,
+ NULL);
+ }
+ }
+}
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