2989bad35a
Add new tool GimpHandleTransformTool which allows to freely place up to 4 handles on the image, then move any one of them, which transforms the image so that the remaining handles keep their position. Did quite some cleanup on the code before pushing --Mitch
165 lines
7 KiB
C
165 lines
7 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 <http://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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typedef enum
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{
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TRANSFORM_CREATING,
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TRANSFORM_HANDLE_NONE,
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TRANSFORM_HANDLE_NW_P, /* perspective handles */
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TRANSFORM_HANDLE_NE_P,
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TRANSFORM_HANDLE_SW_P,
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TRANSFORM_HANDLE_SE_P,
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TRANSFORM_HANDLE_NW, /* north west */
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TRANSFORM_HANDLE_NE, /* north east */
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TRANSFORM_HANDLE_SW, /* south west */
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TRANSFORM_HANDLE_SE, /* south east */
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TRANSFORM_HANDLE_N, /* north */
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TRANSFORM_HANDLE_S, /* south */
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TRANSFORM_HANDLE_E, /* east */
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TRANSFORM_HANDLE_W, /* west */
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TRANSFORM_HANDLE_CENTER, /* for moving */
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TRANSFORM_HANDLE_PIVOT, /* pivot for rotation and scaling */
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TRANSFORM_HANDLE_N_S, /* shearing handles */
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TRANSFORM_HANDLE_S_S,
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TRANSFORM_HANDLE_E_S,
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TRANSFORM_HANDLE_W_S,
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TRANSFORM_HANDLE_ROTATION, /* rotation handle */
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TRANSFORM_HANDLE_NUM /* keep this last so *handles[] is the right size */
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} TransformAction;
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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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gdouble curx; /* current x coord */
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gdouble cury; /* current y coord */
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gdouble lastx; /* last x coord */
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gdouble lasty; /* last y coord */
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gdouble previousx; /* previous x coord */
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gdouble previousy; /* previous y coord */
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gdouble mousex; /* x coord where mouse was clicked */
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gdouble mousey; /* y coord where mouse was clicked */
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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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gdouble cx, cy; /* center point (for moving) */
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gdouble px, py; /* pivot point (for rotation/scaling)*/
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gdouble aspect; /* original aspect ratio */
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gdouble tx1, ty1; /* transformed handle coords */
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gdouble tx2, ty2;
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gdouble tx3, ty3;
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gdouble tx4, ty4;
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gdouble tcx, tcy;
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gdouble tpx, tpy;
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GimpMatrix3 transform; /* transformation matrix */
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TransInfo trans_info; /* transformation info */
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TransInfo *old_trans_info; /* for resetting everything */
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TransInfo *prev_trans_info; /* the current finished state */
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GList *undo_list; /* list of all states,
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head is current == prev_trans_info,
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tail is original == old_trans_info*/
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GList *redo_list; /* list of all undone states,
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NULL when nothing undone */
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TransformAction function; /* current tool activity */
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gboolean use_grid; /* does the tool use the grid */
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gboolean use_handles; /* uses the corner handles */
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gboolean use_center; /* uses the center handle */
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gboolean use_mid_handles; /* use handles at midpoints of edges */
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gboolean use_pivot; /* use pivot point */
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GimpCanvasItem *handles[TRANSFORM_HANDLE_NUM];
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const gchar *progress_text;
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GimpToolGui *gui;
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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 (* dialog) (GimpTransformTool *tool);
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void (* dialog_update) (GimpTransformTool *tool);
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void (* prepare) (GimpTransformTool *tool);
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void (* motion) (GimpTransformTool *tool);
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void (* recalc_matrix) (GimpTransformTool *tool);
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gchar * (* get_undo_desc) (GimpTransformTool *tool);
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TransformAction (* pick_function) (GimpTransformTool *tool,
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const GimpCoords *coords,
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GdkModifierType state,
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GimpDisplay *display);
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void (* cursor_update) (GimpTransformTool *tr_tool,
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GimpCursorType *cursor,
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GimpCursorModifier *modifier);
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void (* draw_gui) (GimpTransformTool *tool,
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gint handle_w,
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gint handle_h);
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GeglBuffer * (* transform) (GimpTransformTool *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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gint *new_offset_x,
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gint *new_offset_y);
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};
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GType gimp_transform_tool_get_type (void) G_GNUC_CONST;
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void gimp_transform_tool_recalc_matrix (GimpTransformTool *tr_tool);
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void gimp_transform_tool_push_internal_undo (GimpTransformTool *tr_tool);
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#endif /* __GIMP_TRANSFORM_TOOL_H__ */
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