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-rw-r--r--app/tools/gimphandletransformtool.c384
1 files changed, 384 insertions, 0 deletions
diff --git a/app/tools/gimphandletransformtool.c b/app/tools/gimphandletransformtool.c
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+++ b/app/tools/gimphandletransformtool.c
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+/* 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 <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpmath/gimpmath.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "tools-types.h"
+
+#include "widgets/gimphelp-ids.h"
+#include "widgets/gimpwidgets-utils.h"
+
+#include "display/gimpdisplay.h"
+#include "display/gimptoolhandlegrid.h"
+#include "display/gimptoolgui.h"
+
+#include "gimphandletransformoptions.h"
+#include "gimphandletransformtool.h"
+#include "gimptoolcontrol.h"
+
+#include "gimp-intl.h"
+
+
+/* the transformation is defined by 8 points:
+ *
+ * 4 points on the original image and 4 corresponding points on the
+ * transformed image. The first N_HANDLES points on the transformed
+ * image are visible as handles.
+ *
+ * For these handles, the constants TRANSFORM_HANDLE_N,
+ * TRANSFORM_HANDLE_S, TRANSFORM_HANDLE_E and TRANSFORM_HANDLE_W are
+ * used. Actually, it makes no sense to name the handles with north,
+ * south, east, and west. But this way, we don't need to define even
+ * more enum constants.
+ */
+
+/* index into trans_info array */
+enum
+{
+ X0,
+ Y0,
+ X1,
+ Y1,
+ X2,
+ Y2,
+ X3,
+ Y3,
+ OX0,
+ OY0,
+ OX1,
+ OY1,
+ OX2,
+ OY2,
+ OX3,
+ OY3,
+ N_HANDLES
+};
+
+
+/* local function prototypes */
+
+static void gimp_handle_transform_tool_modifier_key (GimpTool *tool,
+ GdkModifierType key,
+ gboolean press,
+ GdkModifierType state,
+ GimpDisplay *display);
+
+static void gimp_handle_transform_tool_matrix_to_info (GimpTransformGridTool *tg_tool,
+ const GimpMatrix3 *transform);
+static void gimp_handle_transform_tool_prepare (GimpTransformGridTool *tg_tool);
+static GimpToolWidget * gimp_handle_transform_tool_get_widget (GimpTransformGridTool *tg_tool);
+static void gimp_handle_transform_tool_update_widget (GimpTransformGridTool *tg_tool);
+static void gimp_handle_transform_tool_widget_changed (GimpTransformGridTool *tg_tool);
+
+static void gimp_handle_transform_tool_info_to_points (GimpGenericTransformTool *generic);
+
+
+G_DEFINE_TYPE (GimpHandleTransformTool, gimp_handle_transform_tool,
+ GIMP_TYPE_GENERIC_TRANSFORM_TOOL)
+
+#define parent_class gimp_handle_transform_tool_parent_class
+
+
+void
+gimp_handle_transform_tool_register (GimpToolRegisterCallback callback,
+ gpointer data)
+{
+ (* callback) (GIMP_TYPE_HANDLE_TRANSFORM_TOOL,
+ GIMP_TYPE_HANDLE_TRANSFORM_OPTIONS,
+ gimp_handle_transform_options_gui,
+ GIMP_CONTEXT_PROP_MASK_BACKGROUND,
+ "gimp-handle-transform-tool",
+ _("Handle Transform"),
+ _("Handle Transform Tool: "
+ "Deform the layer, selection or path with handles"),
+ N_("_Handle Transform"), "<shift>L",
+ NULL, GIMP_HELP_TOOL_HANDLE_TRANSFORM,
+ GIMP_ICON_TOOL_HANDLE_TRANSFORM,
+ data);
+}
+
+static void
+gimp_handle_transform_tool_class_init (GimpHandleTransformToolClass *klass)
+{
+ GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
+ GimpTransformToolClass *tr_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
+ GimpTransformGridToolClass *tg_class = GIMP_TRANSFORM_GRID_TOOL_CLASS (klass);
+ GimpGenericTransformToolClass *generic_class = GIMP_GENERIC_TRANSFORM_TOOL_CLASS (klass);
+
+ tool_class->modifier_key = gimp_handle_transform_tool_modifier_key;
+
+ tg_class->matrix_to_info = gimp_handle_transform_tool_matrix_to_info;
+ tg_class->prepare = gimp_handle_transform_tool_prepare;
+ tg_class->get_widget = gimp_handle_transform_tool_get_widget;
+ tg_class->update_widget = gimp_handle_transform_tool_update_widget;
+ tg_class->widget_changed = gimp_handle_transform_tool_widget_changed;
+
+ generic_class->info_to_points = gimp_handle_transform_tool_info_to_points;
+
+ tr_class->undo_desc = C_("undo-type", "Handle transform");
+ tr_class->progress_text = _("Handle transformation");
+}
+
+static void
+gimp_handle_transform_tool_init (GimpHandleTransformTool *ht_tool)
+{
+ ht_tool->saved_handle_mode = GIMP_HANDLE_MODE_ADD_TRANSFORM;
+}
+
+static void
+gimp_handle_transform_tool_modifier_key (GimpTool *tool,
+ GdkModifierType key,
+ gboolean press,
+ GdkModifierType state,
+ GimpDisplay *display)
+{
+ GimpHandleTransformTool *ht_tool = GIMP_HANDLE_TRANSFORM_TOOL (tool);
+ GimpHandleTransformOptions *options;
+ GdkModifierType shift = gimp_get_extend_selection_mask ();
+ GdkModifierType ctrl = gimp_get_constrain_behavior_mask ();
+ GimpTransformHandleMode handle_mode;
+
+ options = GIMP_HANDLE_TRANSFORM_TOOL_GET_OPTIONS (tool);
+
+ handle_mode = options->handle_mode;
+
+ if (press)
+ {
+ if (key == (state & (shift | ctrl)))
+ {
+ /* first modifier pressed */
+ ht_tool->saved_handle_mode = options->handle_mode;
+ }
+ }
+ else
+ {
+ if (! (state & (shift | ctrl)))
+ {
+ /* last modifier released */
+ handle_mode = ht_tool->saved_handle_mode;
+ }
+ }
+
+ if (state & shift)
+ {
+ handle_mode = GIMP_HANDLE_MODE_MOVE;
+ }
+ else if (state & ctrl)
+ {
+ handle_mode = GIMP_HANDLE_MODE_REMOVE;
+ }
+
+ if (handle_mode != options->handle_mode)
+ {
+ g_object_set (options,
+ "handle-mode", handle_mode,
+ NULL);
+ }
+
+ GIMP_TOOL_CLASS (parent_class)->modifier_key (tool, key, press,
+ state, display);
+}
+
+static void
+gimp_handle_transform_tool_matrix_to_info (GimpTransformGridTool *tg_tool,
+ const GimpMatrix3 *transform)
+{
+ gimp_matrix3_transform_point (transform,
+ tg_tool->trans_info[OX0],
+ tg_tool->trans_info[OY0],
+ &tg_tool->trans_info[X0],
+ &tg_tool->trans_info[Y0]);
+ gimp_matrix3_transform_point (transform,
+ tg_tool->trans_info[OX1],
+ tg_tool->trans_info[OY1],
+ &tg_tool->trans_info[X1],
+ &tg_tool->trans_info[Y1]);
+ gimp_matrix3_transform_point (transform,
+ tg_tool->trans_info[OX2],
+ tg_tool->trans_info[OY2],
+ &tg_tool->trans_info[X2],
+ &tg_tool->trans_info[Y2]);
+ gimp_matrix3_transform_point (transform,
+ tg_tool->trans_info[OX3],
+ tg_tool->trans_info[OY3],
+ &tg_tool->trans_info[X3],
+ &tg_tool->trans_info[Y3]);
+}
+
+static void
+gimp_handle_transform_tool_prepare (GimpTransformGridTool *tg_tool)
+{
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+
+ GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->prepare (tg_tool);
+
+ 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->y1;
+ tg_tool->trans_info[X2] = (gdouble) tr_tool->x1;
+ tg_tool->trans_info[Y2] = (gdouble) tr_tool->y2;
+ tg_tool->trans_info[X3] = (gdouble) tr_tool->x2;
+ tg_tool->trans_info[Y3] = (gdouble) tr_tool->y2;
+ tg_tool->trans_info[OX0] = (gdouble) tr_tool->x1;
+ tg_tool->trans_info[OY0] = (gdouble) tr_tool->y1;
+ tg_tool->trans_info[OX1] = (gdouble) tr_tool->x2;
+ tg_tool->trans_info[OY1] = (gdouble) tr_tool->y1;
+ tg_tool->trans_info[OX2] = (gdouble) tr_tool->x1;
+ tg_tool->trans_info[OY2] = (gdouble) tr_tool->y2;
+ tg_tool->trans_info[OX3] = (gdouble) tr_tool->x2;
+ tg_tool->trans_info[OY3] = (gdouble) tr_tool->y2;
+ tg_tool->trans_info[N_HANDLES] = 0;
+}
+
+static GimpToolWidget *
+gimp_handle_transform_tool_get_widget (GimpTransformGridTool *tg_tool)
+{
+ GimpTool *tool = GIMP_TOOL (tg_tool);
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+ GimpHandleTransformOptions *options;
+ GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
+ GimpToolWidget *widget;
+
+ options = GIMP_HANDLE_TRANSFORM_TOOL_GET_OPTIONS (tg_tool);
+
+ widget = gimp_tool_handle_grid_new (shell,
+ tr_tool->x1,
+ tr_tool->y1,
+ tr_tool->x2,
+ tr_tool->y2);
+
+ g_object_set (widget,
+ "n-handles", (gint) tg_tool->trans_info[N_HANDLES],
+ "orig-x1", tg_tool->trans_info[OX0],
+ "orig-y1", tg_tool->trans_info[OY0],
+ "orig-x2", tg_tool->trans_info[OX1],
+ "orig-y2", tg_tool->trans_info[OY1],
+ "orig-x3", tg_tool->trans_info[OX2],
+ "orig-y3", tg_tool->trans_info[OY2],
+ "orig-x4", tg_tool->trans_info[OX3],
+ "orig-y4", tg_tool->trans_info[OY3],
+ "trans-x1", tg_tool->trans_info[X0],
+ "trans-y1", tg_tool->trans_info[Y0],
+ "trans-x2", tg_tool->trans_info[X1],
+ "trans-y2", tg_tool->trans_info[Y1],
+ "trans-x3", tg_tool->trans_info[X2],
+ "trans-y3", tg_tool->trans_info[Y2],
+ "trans-x4", tg_tool->trans_info[X3],
+ "trans-y4", tg_tool->trans_info[Y3],
+ NULL);
+
+ g_object_bind_property (G_OBJECT (options), "handle-mode",
+ G_OBJECT (widget), "handle-mode",
+ G_BINDING_SYNC_CREATE |
+ G_BINDING_BIDIRECTIONAL);
+
+ return widget;
+}
+
+static void
+gimp_handle_transform_tool_update_widget (GimpTransformGridTool *tg_tool)
+{
+ GimpMatrix3 transform;
+ gboolean transform_valid;
+
+ GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->update_widget (tg_tool);
+
+ transform_valid = gimp_transform_grid_tool_info_to_matrix (tg_tool,
+ &transform);
+
+ g_object_set (tg_tool->widget,
+ "show-guides", transform_valid,
+ "n-handles", (gint) tg_tool->trans_info[N_HANDLES],
+ "orig-x1", tg_tool->trans_info[OX0],
+ "orig-y1", tg_tool->trans_info[OY0],
+ "orig-x2", tg_tool->trans_info[OX1],
+ "orig-y2", tg_tool->trans_info[OY1],
+ "orig-x3", tg_tool->trans_info[OX2],
+ "orig-y3", tg_tool->trans_info[OY2],
+ "orig-x4", tg_tool->trans_info[OX3],
+ "orig-y4", tg_tool->trans_info[OY3],
+ "trans-x1", tg_tool->trans_info[X0],
+ "trans-y1", tg_tool->trans_info[Y0],
+ "trans-x2", tg_tool->trans_info[X1],
+ "trans-y2", tg_tool->trans_info[Y1],
+ "trans-x3", tg_tool->trans_info[X2],
+ "trans-y3", tg_tool->trans_info[Y2],
+ "trans-x4", tg_tool->trans_info[X3],
+ "trans-y4", tg_tool->trans_info[Y3],
+ NULL);
+}
+
+static void
+gimp_handle_transform_tool_widget_changed (GimpTransformGridTool *tg_tool)
+{
+ gint n_handles;
+
+ g_object_get (tg_tool->widget,
+ "n-handles", &n_handles,
+ "orig-x1", &tg_tool->trans_info[OX0],
+ "orig-y1", &tg_tool->trans_info[OY0],
+ "orig-x2", &tg_tool->trans_info[OX1],
+ "orig-y2", &tg_tool->trans_info[OY1],
+ "orig-x3", &tg_tool->trans_info[OX2],
+ "orig-y3", &tg_tool->trans_info[OY2],
+ "orig-x4", &tg_tool->trans_info[OX3],
+ "orig-y4", &tg_tool->trans_info[OY3],
+ "trans-x1", &tg_tool->trans_info[X0],
+ "trans-y1", &tg_tool->trans_info[Y0],
+ "trans-x2", &tg_tool->trans_info[X1],
+ "trans-y2", &tg_tool->trans_info[Y1],
+ "trans-x3", &tg_tool->trans_info[X2],
+ "trans-y3", &tg_tool->trans_info[Y2],
+ "trans-x4", &tg_tool->trans_info[X3],
+ "trans-y4", &tg_tool->trans_info[Y3],
+ NULL);
+
+ tg_tool->trans_info[N_HANDLES] = n_handles;
+
+ GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->widget_changed (tg_tool);
+}
+
+static void
+gimp_handle_transform_tool_info_to_points (GimpGenericTransformTool *generic)
+{
+ GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (generic);
+
+ generic->input_points[0] = (GimpVector2) {tg_tool->trans_info[OX0],
+ tg_tool->trans_info[OY0]};
+ generic->input_points[1] = (GimpVector2) {tg_tool->trans_info[OX1],
+ tg_tool->trans_info[OY1]};
+ generic->input_points[2] = (GimpVector2) {tg_tool->trans_info[OX2],
+ tg_tool->trans_info[OY2]};
+ generic->input_points[3] = (GimpVector2) {tg_tool->trans_info[OX3],
+ tg_tool->trans_info[OY3]};
+
+ generic->output_points[0] = (GimpVector2) {tg_tool->trans_info[X0],
+ tg_tool->trans_info[Y0]};
+ generic->output_points[1] = (GimpVector2) {tg_tool->trans_info[X1],
+ tg_tool->trans_info[Y1]};
+ generic->output_points[2] = (GimpVector2) {tg_tool->trans_info[X2],
+ tg_tool->trans_info[Y2]};
+ generic->output_points[3] = (GimpVector2) {tg_tool->trans_info[X3],
+ tg_tool->trans_info[Y3]};
+}
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