mirror of https://github.com/GNOME/gimp.git
396 lines
14 KiB
C
396 lines
14 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpdrawable-stroke.c
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* Copyright (C) 2003 Simon Budig <simon@gimp.org>
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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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#include "config.h"
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#include <cairo.h>
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#include <gegl.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "libgimpbase/gimpbase.h"
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#include "libgimpmath/gimpmath.h"
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#include "libgimpcolor/gimpcolor.h"
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#include "core-types.h"
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#include "gegl/gimp-gegl-apply-operation.h"
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#include "gegl/gimp-gegl-utils.h"
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#include "gimp.h"
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#include "gimpbezierdesc.h"
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#include "gimpboundary.h"
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#include "gimpchannel.h"
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#include "gimpcontext.h"
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#include "gimpdrawable-stroke.h"
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#include "gimperror.h"
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#include "gimpimage.h"
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#include "gimppattern.h"
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#include "gimpscanconvert.h"
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#include "gimpstrokeoptions.h"
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#include "vectors/gimpstroke.h"
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#include "vectors/gimpvectors.h"
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#include "gimp-intl.h"
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/* local function prototypes */
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static GimpScanConvert * gimp_drawable_render_boundary (GimpDrawable *drawable,
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const GimpBoundSeg *bound_segs,
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gint n_bound_segs,
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gint offset_x,
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gint offset_y);
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static GimpScanConvert * gimp_drawable_render_vectors (GimpDrawable *drawable,
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GimpVectors *vectors,
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gboolean do_stroke,
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GError **error);
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static void gimp_drawable_stroke_scan_convert (GimpDrawable *drawable,
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GimpFillOptions *options,
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GimpScanConvert *scan_convert,
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gboolean do_stroke,
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gboolean push_undo);
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/* public functions */
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void
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gimp_drawable_fill_boundary (GimpDrawable *drawable,
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GimpFillOptions *options,
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const GimpBoundSeg *bound_segs,
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gint n_bound_segs,
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gint offset_x,
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gint offset_y,
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gboolean push_undo)
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{
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GimpScanConvert *scan_convert;
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
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g_return_if_fail (GIMP_IS_STROKE_OPTIONS (options));
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g_return_if_fail (bound_segs == NULL || n_bound_segs != 0);
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g_return_if_fail (gimp_fill_options_get_style (options) !=
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GIMP_FILL_STYLE_PATTERN ||
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gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL);
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scan_convert = gimp_drawable_render_boundary (drawable,
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bound_segs, n_bound_segs,
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offset_x, offset_y);
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if (scan_convert)
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{
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gimp_drawable_stroke_scan_convert (drawable, options,
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scan_convert, FALSE, push_undo);
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gimp_scan_convert_free (scan_convert);
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}
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}
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void
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gimp_drawable_stroke_boundary (GimpDrawable *drawable,
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GimpStrokeOptions *options,
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const GimpBoundSeg *bound_segs,
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gint n_bound_segs,
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gint offset_x,
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gint offset_y,
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gboolean push_undo)
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{
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GimpScanConvert *scan_convert;
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
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g_return_if_fail (GIMP_IS_STROKE_OPTIONS (options));
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g_return_if_fail (bound_segs == NULL || n_bound_segs != 0);
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g_return_if_fail (gimp_fill_options_get_style (GIMP_FILL_OPTIONS (options)) !=
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GIMP_FILL_STYLE_PATTERN ||
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gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL);
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scan_convert = gimp_drawable_render_boundary (drawable,
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bound_segs, n_bound_segs,
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offset_x, offset_y);
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if (scan_convert)
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{
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gimp_drawable_stroke_scan_convert (drawable, GIMP_FILL_OPTIONS (options),
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scan_convert, TRUE, push_undo);
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gimp_scan_convert_free (scan_convert);
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}
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}
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gboolean
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gimp_drawable_fill_vectors (GimpDrawable *drawable,
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GimpFillOptions *options,
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GimpVectors *vectors,
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gboolean push_undo,
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GError **error)
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{
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GimpScanConvert *scan_convert;
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g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
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g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), FALSE);
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g_return_val_if_fail (GIMP_IS_FILL_OPTIONS (options), FALSE);
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g_return_val_if_fail (GIMP_IS_VECTORS (vectors), FALSE);
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g_return_val_if_fail (gimp_fill_options_get_style (options) !=
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GIMP_FILL_STYLE_PATTERN ||
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gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL,
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FALSE);
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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scan_convert = gimp_drawable_render_vectors (drawable, vectors, FALSE, error);
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if (scan_convert)
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{
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gimp_drawable_stroke_scan_convert (drawable, options,
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scan_convert, FALSE, push_undo);
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gimp_scan_convert_free (scan_convert);
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return TRUE;
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}
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return FALSE;
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}
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gboolean
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gimp_drawable_stroke_vectors (GimpDrawable *drawable,
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GimpStrokeOptions *options,
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GimpVectors *vectors,
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gboolean push_undo,
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GError **error)
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{
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GimpScanConvert *scan_convert;
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g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
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g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), FALSE);
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g_return_val_if_fail (GIMP_IS_STROKE_OPTIONS (options), FALSE);
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g_return_val_if_fail (GIMP_IS_VECTORS (vectors), FALSE);
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g_return_val_if_fail (gimp_fill_options_get_style (GIMP_FILL_OPTIONS (options)) !=
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GIMP_FILL_STYLE_PATTERN ||
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gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL,
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FALSE);
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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scan_convert = gimp_drawable_render_vectors (drawable, vectors, TRUE, error);
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if (scan_convert)
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{
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gimp_drawable_stroke_scan_convert (drawable, GIMP_FILL_OPTIONS (options),
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scan_convert, TRUE, push_undo);
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gimp_scan_convert_free (scan_convert);
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return TRUE;
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}
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return FALSE;
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}
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/* private functions */
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static GimpScanConvert *
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gimp_drawable_render_boundary (GimpDrawable *drawable,
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const GimpBoundSeg *bound_segs,
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gint n_bound_segs,
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gint offset_x,
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gint offset_y)
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{
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if (bound_segs)
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{
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GimpBoundSeg *stroke_segs;
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gint n_stroke_segs;
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stroke_segs = gimp_boundary_sort (bound_segs, n_bound_segs,
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&n_stroke_segs);
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if (stroke_segs)
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{
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GimpBezierDesc *bezier;
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bezier = gimp_bezier_desc_new_from_bound_segs (stroke_segs,
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n_bound_segs,
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n_stroke_segs);
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g_free (stroke_segs);
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if (bezier)
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{
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GimpScanConvert *scan_convert;
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scan_convert = gimp_scan_convert_new ();
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gimp_bezier_desc_translate (bezier, offset_x, offset_y);
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gimp_scan_convert_add_bezier (scan_convert, bezier);
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gimp_bezier_desc_free (bezier);
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return scan_convert;
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}
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}
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}
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return NULL;
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}
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static GimpScanConvert *
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gimp_drawable_render_vectors (GimpDrawable *drawable,
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GimpVectors *vectors,
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gboolean do_stroke,
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GError **error)
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{
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const GimpBezierDesc *bezier;
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bezier = gimp_vectors_get_bezier (vectors);
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if (bezier && (do_stroke ? bezier->num_data >= 2 : bezier->num_data > 4))
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{
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GimpScanConvert *scan_convert;
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scan_convert = gimp_scan_convert_new ();
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gimp_scan_convert_add_bezier (scan_convert, bezier);
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return scan_convert;
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}
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g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
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do_stroke ?
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_("Not enough points to stroke") :
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_("Not enough points to fill"));
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return NULL;
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}
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static void
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gimp_drawable_stroke_scan_convert (GimpDrawable *drawable,
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GimpFillOptions *options,
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GimpScanConvert *scan_convert,
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gboolean do_stroke,
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gboolean push_undo)
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{
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GimpContext *context = GIMP_CONTEXT (options);
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GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
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GeglBuffer *base_buffer;
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GeglBuffer *mask_buffer;
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gint x, y, w, h;
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gint off_x;
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gint off_y;
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/* must call gimp_channel_is_empty() instead of relying on
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* gimp_item_mask_intersect() because the selection pretends to
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* be empty while it is being stroked, to prevent masking itself.
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*/
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if (gimp_channel_is_empty (gimp_image_get_mask (image)))
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{
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x = 0;
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y = 0;
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w = gimp_item_get_width (GIMP_ITEM (drawable));
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h = gimp_item_get_height (GIMP_ITEM (drawable));
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}
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else if (! gimp_item_mask_intersect (GIMP_ITEM (drawable), &x, &y, &w, &h))
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{
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return;
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}
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if (do_stroke)
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{
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GimpStrokeOptions *stroke_options = GIMP_STROKE_OPTIONS (options);
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gdouble width;
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GimpUnit unit;
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width = gimp_stroke_options_get_width (stroke_options);
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unit = gimp_stroke_options_get_unit (stroke_options);
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if (unit != GIMP_UNIT_PIXEL)
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{
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gdouble xres;
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gdouble yres;
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gimp_image_get_resolution (image, &xres, &yres);
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gimp_scan_convert_set_pixel_ratio (scan_convert, yres / xres);
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width = gimp_units_to_pixels (width, unit, yres);
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}
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gimp_scan_convert_stroke (scan_convert, width,
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gimp_stroke_options_get_join_style (stroke_options),
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gimp_stroke_options_get_cap_style (stroke_options),
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gimp_stroke_options_get_miter_limit (stroke_options),
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gimp_stroke_options_get_dash_offset (stroke_options),
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gimp_stroke_options_get_dash_info (stroke_options));
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}
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/* fill a 1-bpp GeglBuffer with black, this will describe the shape
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* of the stroke.
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*/
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mask_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, w, h),
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babl_format ("Y u8"));
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/* render the stroke into it */
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gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
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gimp_scan_convert_render (scan_convert, mask_buffer,
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x + off_x, y + off_y,
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gimp_fill_options_get_antialias (options));
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base_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, w, h),
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gimp_drawable_get_format_with_alpha (drawable));
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switch (gimp_fill_options_get_style (options))
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{
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case GIMP_FILL_STYLE_SOLID:
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{
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GimpRGB fg;
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GeglColor *color;
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gimp_context_get_foreground (context, &fg);
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color = gimp_gegl_color_new (&fg);
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gegl_buffer_set_color (base_buffer, NULL, color);
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g_object_unref (color);
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}
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break;
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case GIMP_FILL_STYLE_PATTERN:
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{
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GimpPattern *pattern = gimp_context_get_pattern (context);
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GeglBuffer *pattern_buffer;
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pattern_buffer = gimp_pattern_create_buffer (pattern);
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gegl_buffer_set_pattern (base_buffer, NULL, pattern_buffer, 0, 0);
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g_object_unref (pattern_buffer);
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}
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break;
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}
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gimp_gegl_apply_opacity (base_buffer, NULL, NULL, base_buffer,
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mask_buffer, 0, 0, 1.0);
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g_object_unref (mask_buffer);
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/* Apply to drawable */
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gimp_drawable_apply_buffer (drawable, base_buffer,
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GEGL_RECTANGLE (0, 0, w, h),
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push_undo, C_("undo-type", "Render Stroke"),
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gimp_context_get_opacity (context),
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gimp_context_get_paint_mode (context),
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NULL, x, y);
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g_object_unref (base_buffer);
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gimp_drawable_update (drawable, x, y, w, h);
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}
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