de8e81f81f
In GimpTransformGridTool, allow performing simultaneous forward (normal) and backward (corrective) transforms, by having each transform direction operate on an independent set of parameters. In other words, whereas the transform-grid tools previously had a single transform, which could be applied either normally or correctively using the "direction" tool-option, they now have two independent transforms, one applied normally and the other applied correctively, which are toggled using the "direction" option. The overall transform is the combination of the backward transform, followed by the forward transform. Another way to think about it, is that the tool transforms a source shape into a destination shape. The source shape is defined by the backward transform, and the destination shape is defined by the forward transform. Wherewas previously only one of these shapes could be controlled (the other shape always being the item bounds), it's now possible to control both shapes in a single transform. The next commit will allow modifying both shapes simultaneously, making this even more useful. Note that since both transforms start off as the identity, using only one of the transform directions has the same behavior as before.
98 lines
4.3 KiB
C
98 lines
4.3 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
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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 3 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, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef __GIMP_TRANSFORM_TOOL_H__
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#define __GIMP_TRANSFORM_TOOL_H__
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#include "gimpdrawtool.h"
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/* This is not the number of items in the enum above, but the max size
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* of the enums at the top of each transformation tool, stored in
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* trans_info and related
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*/
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#define TRANS_INFO_SIZE 17
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typedef gdouble TransInfo[TRANS_INFO_SIZE];
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#define GIMP_TYPE_TRANSFORM_TOOL (gimp_transform_tool_get_type ())
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#define GIMP_TRANSFORM_TOOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_TRANSFORM_TOOL, GimpTransformTool))
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#define GIMP_TRANSFORM_TOOL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_TRANSFORM_TOOL, GimpTransformToolClass))
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#define GIMP_IS_TRANSFORM_TOOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_TRANSFORM_TOOL))
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#define GIMP_IS_TRANSFORM_TOOL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_TRANSFORM_TOOL))
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#define GIMP_TRANSFORM_TOOL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_TRANSFORM_TOOL, GimpTransformToolClass))
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#define GIMP_TRANSFORM_TOOL_GET_OPTIONS(t) (GIMP_TRANSFORM_OPTIONS (gimp_tool_get_options (GIMP_TOOL (t))))
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typedef struct _GimpTransformToolClass GimpTransformToolClass;
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struct _GimpTransformTool
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{
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GimpDrawTool parent_instance;
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GimpItem *item;
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gint x1, y1; /* upper left hand coordinate */
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gint x2, y2; /* lower right hand coords */
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GimpMatrix3 transform; /* transformation matrix */
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gboolean transform_valid; /* whether the matrix is valid */
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};
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struct _GimpTransformToolClass
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{
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GimpDrawToolClass parent_class;
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/* virtual functions */
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void (* recalc_matrix) (GimpTransformTool *tr_tool);
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gchar * (* get_undo_desc) (GimpTransformTool *tr_tool);
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GimpTransformDirection (* get_direction) (GimpTransformTool *tr_tool);
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GeglBuffer * (* transform) (GimpTransformTool *tr_tool,
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GimpItem *item,
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GeglBuffer *orig_buffer,
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gint orig_offset_x,
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gint orig_offset_y,
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GimpColorProfile **buffer_profile,
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gint *new_offset_x,
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gint *new_offset_y);
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const gchar *undo_desc;
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const gchar *progress_text;
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};
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GType gimp_transform_tool_get_type (void) G_GNUC_CONST;
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GimpItem * gimp_transform_tool_get_active_item (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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GimpItem * gimp_transform_tool_check_active_item (GimpTransformTool *tr_tool,
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GimpDisplay *display,
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GError **error);
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gboolean gimp_transform_tool_bounds (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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void gimp_transform_tool_recalc_matrix (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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gboolean gimp_transform_tool_transform (GimpTransformTool *tr_tool,
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GimpDisplay *display);
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#endif /* __GIMP_TRANSFORM_TOOL_H__ */
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