diff options
Diffstat (limited to 'app/core/gimpdrawable-stroke.c')
| -rw-r--r-- | app/core/gimpdrawable-stroke.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/app/core/gimpdrawable-stroke.c b/app/core/gimpdrawable-stroke.c new file mode 100644 index 0000000..5b35d51 --- /dev/null +++ b/app/core/gimpdrawable-stroke.c @@ -0,0 +1,161 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpdrawable-stroke.c + * Copyright (C) 2003 Simon Budig <simon@gimp.org> + * + * 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 <cairo.h> +#include <gdk-pixbuf/gdk-pixbuf.h> +#include <gegl.h> + +#include "libgimpbase/gimpbase.h" + +#include "core-types.h" + +#include "gimpchannel.h" +#include "gimpdrawable-fill.h" +#include "gimpdrawable-stroke.h" +#include "gimperror.h" +#include "gimpimage.h" +#include "gimpscanconvert.h" +#include "gimpstrokeoptions.h" + +#include "vectors/gimpvectors.h" + +#include "gimp-intl.h" + + +/* public functions */ + +void +gimp_drawable_stroke_boundary (GimpDrawable *drawable, + GimpStrokeOptions *options, + const GimpBoundSeg *bound_segs, + gint n_bound_segs, + gint offset_x, + gint offset_y, + gboolean push_undo) +{ + GimpScanConvert *scan_convert; + + g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); + g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable))); + g_return_if_fail (GIMP_IS_STROKE_OPTIONS (options)); + g_return_if_fail (bound_segs == NULL || n_bound_segs != 0); + g_return_if_fail (gimp_fill_options_get_style (GIMP_FILL_OPTIONS (options)) != + GIMP_FILL_STYLE_PATTERN || + gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL); + + scan_convert = gimp_scan_convert_new_from_boundary (bound_segs, n_bound_segs, + offset_x, offset_y); + + if (scan_convert) + { + gimp_drawable_stroke_scan_convert (drawable, options, + scan_convert, push_undo); + gimp_scan_convert_free (scan_convert); + } +} + +gboolean +gimp_drawable_stroke_vectors (GimpDrawable *drawable, + GimpStrokeOptions *options, + GimpVectors *vectors, + gboolean push_undo, + GError **error) +{ + const GimpBezierDesc *bezier; + + g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE); + g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), FALSE); + g_return_val_if_fail (GIMP_IS_STROKE_OPTIONS (options), FALSE); + g_return_val_if_fail (GIMP_IS_VECTORS (vectors), FALSE); + g_return_val_if_fail (gimp_fill_options_get_style (GIMP_FILL_OPTIONS (options)) != + GIMP_FILL_STYLE_PATTERN || + gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL, + FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + bezier = gimp_vectors_get_bezier (vectors); + + if (bezier && bezier->num_data >= 2) + { + GimpScanConvert *scan_convert = gimp_scan_convert_new (); + + gimp_scan_convert_add_bezier (scan_convert, bezier); + gimp_drawable_stroke_scan_convert (drawable, options, + scan_convert, push_undo); + + gimp_scan_convert_free (scan_convert); + + return TRUE; + } + + g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, + _("Not enough points to stroke")); + + return FALSE; +} + +void +gimp_drawable_stroke_scan_convert (GimpDrawable *drawable, + GimpStrokeOptions *options, + GimpScanConvert *scan_convert, + gboolean push_undo) +{ + gdouble width; + GimpUnit unit; + + g_return_if_fail (GIMP_IS_DRAWABLE (drawable)); + g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable))); + g_return_if_fail (GIMP_IS_STROKE_OPTIONS (options)); + g_return_if_fail (scan_convert != NULL); + g_return_if_fail (gimp_fill_options_get_style (GIMP_FILL_OPTIONS (options)) != + GIMP_FILL_STYLE_PATTERN || + gimp_context_get_pattern (GIMP_CONTEXT (options)) != NULL); + + if (! gimp_item_mask_intersect (GIMP_ITEM (drawable), NULL, NULL, NULL, NULL)) + return; + + width = gimp_stroke_options_get_width (options); + unit = gimp_stroke_options_get_unit (options); + + if (unit != GIMP_UNIT_PIXEL) + { + GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable)); + gdouble xres; + gdouble yres; + + gimp_image_get_resolution (image, &xres, &yres); + + gimp_scan_convert_set_pixel_ratio (scan_convert, yres / xres); + + width = gimp_units_to_pixels (width, unit, yres); + } + + gimp_scan_convert_stroke (scan_convert, width, + gimp_stroke_options_get_join_style (options), + gimp_stroke_options_get_cap_style (options), + gimp_stroke_options_get_miter_limit (options), + gimp_stroke_options_get_dash_offset (options), + gimp_stroke_options_get_dash_info (options)); + + gimp_drawable_fill_scan_convert (drawable, GIMP_FILL_OPTIONS (options), + scan_convert, push_undo); +} |