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