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-rw-r--r--app/tools/gimpperspectivetool.c292
1 files changed, 292 insertions, 0 deletions
diff --git a/app/tools/gimpperspectivetool.c b/app/tools/gimpperspectivetool.c
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+++ b/app/tools/gimpperspectivetool.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 "display/gimpdisplay.h"
+#include "display/gimpdisplayshell.h"
+#include "display/gimpdisplayshell-transform.h"
+#include "display/gimptoolgui.h"
+#include "display/gimptooltransformgrid.h"
+
+#include "gimpperspectivetool.h"
+#include "gimptoolcontrol.h"
+#include "gimptransformgridoptions.h"
+
+#include "gimp-intl.h"
+
+
+/* index into trans_info array */
+enum
+{
+ X0,
+ Y0,
+ X1,
+ Y1,
+ X2,
+ Y2,
+ X3,
+ Y3
+};
+
+
+/* local function prototypes */
+
+static void gimp_perspective_tool_matrix_to_info (GimpTransformGridTool *tg_tool,
+ const GimpMatrix3 *transform);
+static void gimp_perspective_tool_prepare (GimpTransformGridTool *tg_tool);
+static void gimp_perspective_tool_readjust (GimpTransformGridTool *tg_tool);
+static GimpToolWidget * gimp_perspective_tool_get_widget (GimpTransformGridTool *tg_tool);
+static void gimp_perspective_tool_update_widget (GimpTransformGridTool *tg_tool);
+static void gimp_perspective_tool_widget_changed (GimpTransformGridTool *tg_tool);
+
+static void gimp_perspective_tool_info_to_points (GimpGenericTransformTool *generic);
+
+
+G_DEFINE_TYPE (GimpPerspectiveTool, gimp_perspective_tool,
+ GIMP_TYPE_GENERIC_TRANSFORM_TOOL)
+
+#define parent_class gimp_perspective_tool_parent_class
+
+
+void
+gimp_perspective_tool_register (GimpToolRegisterCallback callback,
+ gpointer data)
+{
+ (* callback) (GIMP_TYPE_PERSPECTIVE_TOOL,
+ GIMP_TYPE_TRANSFORM_GRID_OPTIONS,
+ gimp_transform_grid_options_gui,
+ GIMP_CONTEXT_PROP_MASK_BACKGROUND,
+ "gimp-perspective-tool",
+ _("Perspective"),
+ _("Perspective Tool: "
+ "Change perspective of the layer, selection or path"),
+ N_("_Perspective"), "<shift>P",
+ NULL, GIMP_HELP_TOOL_PERSPECTIVE,
+ GIMP_ICON_TOOL_PERSPECTIVE,
+ data);
+}
+
+static void
+gimp_perspective_tool_class_init (GimpPerspectiveToolClass *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);
+
+ tg_class->matrix_to_info = gimp_perspective_tool_matrix_to_info;
+ tg_class->prepare = gimp_perspective_tool_prepare;
+ tg_class->readjust = gimp_perspective_tool_readjust;
+ tg_class->get_widget = gimp_perspective_tool_get_widget;
+ tg_class->update_widget = gimp_perspective_tool_update_widget;
+ tg_class->widget_changed = gimp_perspective_tool_widget_changed;
+
+ generic_class->info_to_points = gimp_perspective_tool_info_to_points;
+
+ tr_class->undo_desc = C_("undo-type", "Perspective");
+ tr_class->progress_text = _("Perspective transformation");
+}
+
+static void
+gimp_perspective_tool_init (GimpPerspectiveTool *perspective_tool)
+{
+ GimpTool *tool = GIMP_TOOL (perspective_tool);
+
+ gimp_tool_control_set_tool_cursor (tool->control,
+ GIMP_TOOL_CURSOR_PERSPECTIVE);
+}
+
+static void
+gimp_perspective_tool_matrix_to_info (GimpTransformGridTool *tg_tool,
+ const GimpMatrix3 *transform)
+{
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x1,
+ tr_tool->y1,
+ &tg_tool->trans_info[X0],
+ &tg_tool->trans_info[Y0]);
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x2,
+ tr_tool->y1,
+ &tg_tool->trans_info[X1],
+ &tg_tool->trans_info[Y1]);
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x1,
+ tr_tool->y2,
+ &tg_tool->trans_info[X2],
+ &tg_tool->trans_info[Y2]);
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x2,
+ tr_tool->y2,
+ &tg_tool->trans_info[X3],
+ &tg_tool->trans_info[Y3]);
+}
+
+static void
+gimp_perspective_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;
+}
+
+static void
+gimp_perspective_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 - r, y - r,
+ &tg_tool->trans_info[X0],
+ &tg_tool->trans_info[Y0]);
+ gimp_display_shell_untransform_xy_f (shell,
+ x + r, y - r,
+ &tg_tool->trans_info[X1],
+ &tg_tool->trans_info[Y1]);
+ gimp_display_shell_untransform_xy_f (shell,
+ x - r, y + r,
+ &tg_tool->trans_info[X2],
+ &tg_tool->trans_info[Y2]);
+ gimp_display_shell_untransform_xy_f (shell,
+ x + r, y + r,
+ &tg_tool->trans_info[X3],
+ &tg_tool->trans_info[Y3]);
+}
+
+static GimpToolWidget *
+gimp_perspective_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_PERSPECTIVE,
+ "outside-function", GIMP_TRANSFORM_FUNCTION_PERSPECTIVE,
+ "use-perspective-handles", TRUE,
+ "use-center-handle", TRUE,
+ NULL);
+
+ return widget;
+}
+
+static void
+gimp_perspective_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_perspective_tool_widget_changed (GimpTransformGridTool *tg_tool)
+{
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
+ GimpMatrix3 *transform;
+
+ g_object_get (tg_tool->widget,
+ "transform", &transform,
+ NULL);
+
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x1, tr_tool->y1,
+ &tg_tool->trans_info[X0],
+ &tg_tool->trans_info[Y0]);
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x2, tr_tool->y1,
+ &tg_tool->trans_info[X1],
+ &tg_tool->trans_info[Y1]);
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x1, tr_tool->y2,
+ &tg_tool->trans_info[X2],
+ &tg_tool->trans_info[Y2]);
+ gimp_matrix3_transform_point (transform,
+ tr_tool->x2, tr_tool->y2,
+ &tg_tool->trans_info[X3],
+ &tg_tool->trans_info[Y3]);
+
+ g_free (transform);
+
+ GIMP_TRANSFORM_GRID_TOOL_CLASS (parent_class)->widget_changed (tg_tool);
+}
+
+static void
+gimp_perspective_tool_info_to_points (GimpGenericTransformTool *generic)
+{
+ GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (generic);
+ GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (generic);
+
+ generic->input_points[0] = (GimpVector2) {tr_tool->x1, tr_tool->y1};
+ generic->input_points[1] = (GimpVector2) {tr_tool->x2, tr_tool->y1};
+ generic->input_points[2] = (GimpVector2) {tr_tool->x1, tr_tool->y2};
+ generic->input_points[3] = (GimpVector2) {tr_tool->x2, tr_tool->y2};
+
+ 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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