/* The GIMP -- an image manipulation program * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * 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 2 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "config.h" #include #include #include "libgimpcolor/gimpcolor.h" #include "core-types.h" #include "base/boundary.h" #include "base/gimplut.h" #include "base/lut-funcs.h" #include "base/pixel-processor.h" #include "base/pixel-region.h" #include "base/tile.h" #include "base/tile-manager.h" #include "paint-funcs/paint-funcs.h" #include "paint/gimppaintcore-stroke.h" #include "paint/gimppaintoptions.h" #include "gimp.h" #include "gimp-utils.h" #include "gimpcontainer.h" #include "gimpimage.h" #include "gimpimage-projection.h" #include "gimpimage-undo.h" #include "gimpimage-undo-push.h" #include "gimpchannel.h" #include "gimpcontext.h" #include "gimpdrawable-stroke.h" #include "gimppaintinfo.h" #include "gimpstrokeoptions.h" #include "gimp-intl.h" static void gimp_channel_class_init (GimpChannelClass *klass); static void gimp_channel_init (GimpChannel *channel); static void gimp_channel_finalize (GObject *object); static gint64 gimp_channel_get_memsize (GimpObject *object, gint64 *gui_size); static gboolean gimp_channel_is_attached (GimpItem *item); static GimpItem * gimp_channel_duplicate (GimpItem *item, GType new_type, gboolean add_alpha); static void gimp_channel_translate (GimpItem *item, gint off_x, gint off_y, gboolean push_undo); static void gimp_channel_scale (GimpItem *item, gint new_width, gint new_height, gint new_offset_x, gint new_offset_y, GimpInterpolationType interp_type, GimpProgressFunc progress_callback, gpointer progress_data); static void gimp_channel_resize (GimpItem *item, GimpContext *context, gint new_width, gint new_height, gint offx, gint offy); static void gimp_channel_flip (GimpItem *item, GimpContext *context, GimpOrientationType flip_type, gdouble axis, gboolean flip_result); static void gimp_channel_rotate (GimpItem *item, GimpContext *context, GimpRotationType flip_type, gdouble center_x, gdouble center_y, gboolean flip_result); static void gimp_channel_transform (GimpItem *item, GimpContext *context, const GimpMatrix3 *matrix, GimpTransformDirection direction, GimpInterpolationType interpolation_type, gboolean supersample, gint recursion_level, gboolean clip_result, GimpProgressFunc progress_callback, gpointer progress_data); static gboolean gimp_channel_stroke (GimpItem *item, GimpDrawable *drawable, GimpContext *context, GimpObject *stroke_desc, gboolean use_default_values); static void gimp_channel_invalidate_boundary (GimpDrawable *drawable); static void gimp_channel_get_active_components (const GimpDrawable *drawable, gboolean *active); static void gimp_channel_apply_region (GimpDrawable *drawable, PixelRegion *src2PR, gboolean push_undo, const gchar *undo_desc, gdouble opacity, GimpLayerModeEffects mode, TileManager *src1_tiles, gint x, gint y); static void gimp_channel_replace_region (GimpDrawable *drawable, PixelRegion *src2PR, gboolean push_undo, const gchar *undo_desc, gdouble opacity, PixelRegion *maskPR, gint x, gint y); static void gimp_channel_set_tiles (GimpDrawable *drawable, gboolean push_undo, const gchar *undo_desc, TileManager *tiles, GimpImageType type, gint offset_x, gint offset_y); static void gimp_channel_swap_pixels (GimpDrawable *drawable, TileManager *tiles, gboolean sparse, gint x, gint y, gint width, gint height); static gboolean gimp_channel_real_boundary (GimpChannel *channel, const BoundSeg **segs_in, const BoundSeg **segs_out, gint *num_segs_in, gint *num_segs_out, gint x1, gint y1, gint x2, gint y2); static gboolean gimp_channel_real_bounds (GimpChannel *channel, gint *x1, gint *y1, gint *x2, gint *y2); static gboolean gimp_channel_real_is_empty (GimpChannel *channel); static gint gimp_channel_real_value (GimpChannel *channel, gint x, gint y); static void gimp_channel_real_feather (GimpChannel *channel, gdouble radius_x, gdouble radius_y, gboolean push_undo); static void gimp_channel_real_sharpen (GimpChannel *channel, gboolean push_undo); static void gimp_channel_real_clear (GimpChannel *channel, const gchar *undo_desc, gboolean push_undo); static void gimp_channel_real_all (GimpChannel *channel, gboolean push_undo); static void gimp_channel_real_invert (GimpChannel *channel, gboolean push_undo); static void gimp_channel_real_border (GimpChannel *channel, gint radius_x, gint radius_y, gboolean push_undo); static void gimp_channel_real_grow (GimpChannel *channel, gint radius_x, gint radius_y, gboolean push_undo); static void gimp_channel_real_shrink (GimpChannel *channel, gint radius_x, gint radius_y, gboolean edge_lock, gboolean push_undo); static void gimp_channel_validate (TileManager *tm, Tile *tile); static GimpDrawableClass * parent_class = NULL; GType gimp_channel_get_type (void) { static GType channel_type = 0; if (! channel_type) { static const GTypeInfo channel_info = { sizeof (GimpChannelClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) gimp_channel_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GimpChannel), 0, /* n_preallocs */ (GInstanceInitFunc) gimp_channel_init, }; channel_type = g_type_register_static (GIMP_TYPE_DRAWABLE, "GimpChannel", &channel_info, 0); } return channel_type; } static void gimp_channel_class_init (GimpChannelClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass); GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass); GimpItemClass *item_class = GIMP_ITEM_CLASS (klass); GimpDrawableClass *drawable_class = GIMP_DRAWABLE_CLASS (klass); parent_class = g_type_class_peek_parent (klass); object_class->finalize = gimp_channel_finalize; gimp_object_class->get_memsize = gimp_channel_get_memsize; viewable_class->default_stock_id = "gimp-channel"; item_class->is_attached = gimp_channel_is_attached; item_class->duplicate = gimp_channel_duplicate; item_class->translate = gimp_channel_translate; item_class->scale = gimp_channel_scale; item_class->resize = gimp_channel_resize; item_class->flip = gimp_channel_flip; item_class->rotate = gimp_channel_rotate; item_class->transform = gimp_channel_transform; item_class->stroke = gimp_channel_stroke; item_class->default_name = _("Channel"); item_class->rename_desc = _("Rename Channel"); item_class->translate_desc = _("Move Channel"); item_class->scale_desc = _("Scale Channel"); item_class->resize_desc = _("Resize Channel"); item_class->flip_desc = _("Flip Channel"); item_class->rotate_desc = _("Rotate Channel"); item_class->transform_desc = _("Transform Channel"); item_class->stroke_desc = _("Stroke Channel"); drawable_class->invalidate_boundary = gimp_channel_invalidate_boundary; drawable_class->get_active_components = gimp_channel_get_active_components; drawable_class->apply_region = gimp_channel_apply_region; drawable_class->replace_region = gimp_channel_replace_region; drawable_class->set_tiles = gimp_channel_set_tiles; drawable_class->swap_pixels = gimp_channel_swap_pixels; klass->boundary = gimp_channel_real_boundary; klass->bounds = gimp_channel_real_bounds; klass->is_empty = gimp_channel_real_is_empty; klass->value = gimp_channel_real_value; klass->feather = gimp_channel_real_feather; klass->sharpen = gimp_channel_real_sharpen; klass->clear = gimp_channel_real_clear; klass->all = gimp_channel_real_all; klass->invert = gimp_channel_real_invert; klass->border = gimp_channel_real_border; klass->grow = gimp_channel_real_grow; klass->shrink = gimp_channel_real_shrink; klass->feather_desc = _("Feather Channel"); klass->sharpen_desc = _("Sharpen Channel"); klass->clear_desc = _("Clear Channel"); klass->all_desc = _("Fill Channel"); klass->invert_desc = _("Invert Channel"); klass->border_desc = _("Border Channel"); klass->grow_desc = _("Grow Channel"); klass->shrink_desc = _("Shrink Channel"); } static void gimp_channel_init (GimpChannel *channel) { gimp_rgba_set (&channel->color, 0.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE); channel->show_masked = FALSE; /* Selection mask variables */ channel->boundary_known = FALSE; channel->segs_in = NULL; channel->segs_out = NULL; channel->num_segs_in = 0; channel->num_segs_out = 0; channel->empty = FALSE; channel->bounds_known = FALSE; channel->x1 = 0; channel->y1 = 0; channel->x2 = 0; channel->y2 = 0; } static void gimp_channel_finalize (GObject *object) { GimpChannel *channel = GIMP_CHANNEL (object); if (channel->segs_in) { g_free (channel->segs_in); channel->segs_in = NULL; } if (channel->segs_out) { g_free (channel->segs_out); channel->segs_out = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } static gint64 gimp_channel_get_memsize (GimpObject *object, gint64 *gui_size) { GimpChannel *channel = GIMP_CHANNEL (object); *gui_size += channel->num_segs_in * sizeof (BoundSeg); *gui_size += channel->num_segs_out * sizeof (BoundSeg); return GIMP_OBJECT_CLASS (parent_class)->get_memsize (object, gui_size); } static gboolean gimp_channel_is_attached (GimpItem *item) { return (GIMP_IS_IMAGE (item->gimage) && gimp_container_have (item->gimage->channels, GIMP_OBJECT (item))); } static GimpItem * gimp_channel_duplicate (GimpItem *item, GType new_type, gboolean add_alpha) { GimpChannel *channel; GimpItem *new_item; GimpChannel *new_channel; g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_DRAWABLE), NULL); if (g_type_is_a (new_type, GIMP_TYPE_CHANNEL)) add_alpha = FALSE; new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type, add_alpha); if (! GIMP_IS_CHANNEL (new_item)) return new_item; channel = GIMP_CHANNEL (item); new_channel = GIMP_CHANNEL (new_item); new_channel->color = channel->color; new_channel->show_masked = channel->show_masked; /* selection mask variables */ new_channel->bounds_known = channel->bounds_known; new_channel->empty = channel->empty; new_channel->x1 = channel->x1; new_channel->y1 = channel->y1; new_channel->x2 = channel->x2; new_channel->y2 = channel->y2; return new_item; } static void gimp_channel_translate (GimpItem *item, gint off_x, gint off_y, gboolean push_undo) { GimpChannel *channel = GIMP_CHANNEL (item); GimpChannel *tmp_mask = NULL; gint width, height; PixelRegion srcPR, destPR; guchar empty = TRANSPARENT_OPACITY; gint x1, y1, x2, y2; gimp_channel_bounds (channel, &x1, &y1, &x2, &y2); /* update the old area */ gimp_drawable_update (GIMP_DRAWABLE (item), x1, y1, x2 - x1, y2 - y1); if (push_undo) gimp_channel_push_undo (channel, NULL); else gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); x1 = CLAMP ((x1 + off_x), 0, GIMP_ITEM (channel)->width); y1 = CLAMP ((y1 + off_y), 0, GIMP_ITEM (channel)->height); x2 = CLAMP ((x2 + off_x), 0, GIMP_ITEM (channel)->width); y2 = CLAMP ((y2 + off_y), 0, GIMP_ITEM (channel)->height); width = x2 - x1; height = y2 - y1; /* make sure width and height are non-zero */ if (width != 0 && height != 0) { /* copy the portion of the mask we will keep to a * temporary buffer */ tmp_mask = gimp_channel_new_mask (gimp_item_get_image (item), width, height); pixel_region_init (&srcPR, GIMP_DRAWABLE (channel)->tiles, x1 - off_x, y1 - off_y, width, height, FALSE); pixel_region_init (&destPR, GIMP_DRAWABLE (tmp_mask)->tiles, 0, 0, width, height, TRUE); copy_region (&srcPR, &destPR); } /* clear the mask */ pixel_region_init (&srcPR, GIMP_DRAWABLE (channel)->tiles, 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height, TRUE); color_region (&srcPR, &empty); if (width != 0 && height != 0) { /* copy the temp mask back to the mask */ pixel_region_init (&srcPR, GIMP_DRAWABLE (tmp_mask)->tiles, 0, 0, width, height, FALSE); pixel_region_init (&destPR, GIMP_DRAWABLE (channel)->tiles, x1, y1, width, height, TRUE); copy_region (&srcPR, &destPR); /* free the temporary mask */ g_object_unref (tmp_mask); } /* calculate new bounds */ if (width == 0 || height == 0) { channel->empty = TRUE; channel->x1 = 0; channel->y1 = 0; channel->x2 = GIMP_ITEM (channel)->width; channel->y2 = GIMP_ITEM (channel)->height; } else { channel->x1 = x1; channel->y1 = y1; channel->x2 = x2; channel->y2 = y2; } /* update the new area */ gimp_drawable_update (GIMP_DRAWABLE (item), channel->x1, channel->y1, channel->x2 - channel->x1, channel->y2 - channel->y1); } static void gimp_channel_scale (GimpItem *item, gint new_width, gint new_height, gint new_offset_x, gint new_offset_y, GimpInterpolationType interpolation_type, GimpProgressFunc progress_callback, gpointer progress_data) { if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL) { new_offset_x = 0; new_offset_y = 0; } GIMP_ITEM_CLASS (parent_class)->scale (item, new_width, new_height, new_offset_x, new_offset_y, interpolation_type, progress_callback, progress_data); } static void gimp_channel_resize (GimpItem *item, GimpContext *context, gint new_width, gint new_height, gint offset_x, gint offset_y) { GIMP_ITEM_CLASS (parent_class)->resize (item, context, new_width, new_height, offset_x, offset_y); if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL) { item->offset_x = 0; item->offset_y = 0; } } static void gimp_channel_flip (GimpItem *item, GimpContext *context, GimpOrientationType flip_type, gdouble axis, gboolean clip_result) { if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL) clip_result = TRUE; GIMP_ITEM_CLASS (parent_class)->flip (item, context, flip_type, axis, clip_result); } static void gimp_channel_rotate (GimpItem *item, GimpContext *context, GimpRotationType rotate_type, gdouble center_x, gdouble center_y, gboolean clip_result) { /* don't default to clip_result == TRUE here */ GIMP_ITEM_CLASS (parent_class)->rotate (item, context, rotate_type, center_x, center_y, clip_result); } static void gimp_channel_transform (GimpItem *item, GimpContext *context, const GimpMatrix3 *matrix, GimpTransformDirection direction, GimpInterpolationType interpolation_type, gboolean supersample, gint recursion_level, gboolean clip_result, GimpProgressFunc progress_callback, gpointer progress_data) { if (G_TYPE_FROM_INSTANCE (item) == GIMP_TYPE_CHANNEL) clip_result = TRUE; GIMP_ITEM_CLASS (parent_class)->transform (item, context, matrix, direction, interpolation_type, supersample, recursion_level, clip_result, progress_callback, progress_data); } static gboolean gimp_channel_stroke (GimpItem *item, GimpDrawable *drawable, GimpContext *context, GimpObject *stroke_desc, gboolean use_default_values) { GimpChannel *channel = GIMP_CHANNEL (item); const BoundSeg *segs_in; const BoundSeg *segs_out; gint n_segs_in; gint n_segs_out; gboolean retval = FALSE; gint offset_x, offset_y; if (! gimp_channel_boundary (channel, &segs_in, &segs_out, &n_segs_in, &n_segs_out, 0, 0, 0, 0)) { g_message (_("Cannot stroke empty channel.")); return FALSE; } gimp_item_offsets (GIMP_ITEM (channel), &offset_x, &offset_y); if (GIMP_IS_STROKE_OPTIONS (stroke_desc)) { gimp_drawable_stroke_boundary (drawable, GIMP_STROKE_OPTIONS (stroke_desc), segs_in, n_segs_in, offset_x, offset_y); retval = TRUE; } else if (GIMP_IS_PAINT_INFO (stroke_desc)) { GimpImage *gimage = gimp_item_get_image (item); GimpPaintInfo *paint_info = GIMP_PAINT_INFO (stroke_desc); GimpPaintOptions *paint_options; GimpPaintCore *core; if (use_default_values) { paint_options = gimp_paint_options_new (gimage->gimp, paint_info->paint_options_type); /* undefine the paint-relevant context properties and get them * from the passed context */ gimp_context_define_properties (GIMP_CONTEXT (paint_options), GIMP_CONTEXT_PAINT_PROPS_MASK, FALSE); gimp_context_set_parent (GIMP_CONTEXT (paint_options), context); } else { paint_options = paint_info->paint_options; } core = g_object_new (paint_info->paint_type, NULL); retval = gimp_paint_core_stroke_boundary (core, drawable, paint_options, segs_in, n_segs_in, offset_x, offset_y); g_object_unref (core); if (use_default_values) g_object_unref (paint_options); } return retval; } static void gimp_channel_invalidate_boundary (GimpDrawable *drawable) { GIMP_CHANNEL (drawable)->boundary_known = FALSE; } static void gimp_channel_get_active_components (const GimpDrawable *drawable, gboolean *active) { /* Make sure that the alpha channel is not valid. */ active[GRAY_PIX] = TRUE; active[ALPHA_G_PIX] = FALSE; } static void gimp_channel_apply_region (GimpDrawable *drawable, PixelRegion *src2PR, gboolean push_undo, const gchar *undo_desc, gdouble opacity, GimpLayerModeEffects mode, TileManager *src1_tiles, gint x, gint y) { gimp_drawable_invalidate_boundary (drawable); GIMP_DRAWABLE_CLASS (parent_class)->apply_region (drawable, src2PR, push_undo, undo_desc, opacity, mode, src1_tiles, x, y); GIMP_CHANNEL (drawable)->bounds_known = FALSE; } static void gimp_channel_replace_region (GimpDrawable *drawable, PixelRegion *src2PR, gboolean push_undo, const gchar *undo_desc, gdouble opacity, PixelRegion *maskPR, gint x, gint y) { gimp_drawable_invalidate_boundary (drawable); GIMP_DRAWABLE_CLASS (parent_class)->replace_region (drawable, src2PR, push_undo, undo_desc, opacity, maskPR, x, y); GIMP_CHANNEL (drawable)->bounds_known = FALSE; } static void gimp_channel_set_tiles (GimpDrawable *drawable, gboolean push_undo, const gchar *undo_desc, TileManager *tiles, GimpImageType type, gint offset_x, gint offset_y) { GIMP_DRAWABLE_CLASS (parent_class)->set_tiles (drawable, push_undo, undo_desc, tiles, type, offset_x, offset_y); GIMP_CHANNEL (drawable)->bounds_known = FALSE; } static void gimp_channel_swap_pixels (GimpDrawable *drawable, TileManager *tiles, gboolean sparse, gint x, gint y, gint width, gint height) { gimp_drawable_invalidate_boundary (drawable); GIMP_DRAWABLE_CLASS (parent_class)->swap_pixels (drawable, tiles, sparse, x, y, width, height); GIMP_CHANNEL (drawable)->bounds_known = FALSE; } static gboolean gimp_channel_real_boundary (GimpChannel *channel, const BoundSeg **segs_in, const BoundSeg **segs_out, gint *num_segs_in, gint *num_segs_out, gint x1, gint y1, gint x2, gint y2) { gint x3, y3, x4, y4; PixelRegion bPR; if (! channel->boundary_known) { /* free the out of date boundary segments */ if (channel->segs_in) g_free (channel->segs_in); if (channel->segs_out) g_free (channel->segs_out); if (gimp_channel_bounds (channel, &x3, &y3, &x4, &y4)) { pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles, x3, y3, x4 - x3, y4 - y3, FALSE); channel->segs_out = find_mask_boundary (&bPR, &channel->num_segs_out, IgnoreBounds, x1, y1, x2, y2, HALF_WAY); x1 = MAX (x1, x3); y1 = MAX (y1, y3); x2 = MIN (x2, x4); y2 = MIN (y2, y4); if (x2 > x1 && y2 > y1) { pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles, 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height, FALSE); channel->segs_in = find_mask_boundary (&bPR, &channel->num_segs_in, WithinBounds, x1, y1, x2, y2, HALF_WAY); } else { channel->segs_in = NULL; channel->num_segs_in = 0; } } else { channel->segs_in = NULL; channel->segs_out = NULL; channel->num_segs_in = 0; channel->num_segs_out = 0; } channel->boundary_known = TRUE; } *segs_in = channel->segs_in; *segs_out = channel->segs_out; *num_segs_in = channel->num_segs_in; *num_segs_out = channel->num_segs_out; return TRUE; } static gboolean gimp_channel_real_bounds (GimpChannel *channel, gint *x1, gint *y1, gint *x2, gint *y2) { PixelRegion maskPR; guchar *data, *data1; gint x, y; gint ex, ey; gint tx1, tx2, ty1, ty2; gint minx, maxx; gpointer pr; /* if the channel's bounds have already been reliably calculated... */ if (channel->bounds_known) { *x1 = channel->x1; *y1 = channel->y1; *x2 = channel->x2; *y2 = channel->y2; return ! channel->empty; } /* go through and calculate the bounds */ tx1 = GIMP_ITEM (channel)->width; ty1 = GIMP_ITEM (channel)->height; tx2 = 0; ty2 = 0; pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles, 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height, FALSE); for (pr = pixel_regions_register (1, &maskPR); pr != NULL; pr = pixel_regions_process (pr)) { data1 = data = maskPR.data; ex = maskPR.x + maskPR.w; ey = maskPR.y + maskPR.h; /* only check the pixels if this tile is not fully within the * currently computed bounds */ if (maskPR.x < tx1 || ex > tx2 || maskPR.y < ty1 || ey > ty2) { /* Check upper left and lower right corners to see if we can * avoid checking the rest of the pixels in this tile */ if (data[0] && data[maskPR.rowstride*(maskPR.h - 1) + maskPR.w - 1]) { if (maskPR.x < tx1) tx1 = maskPR.x; if (ex > tx2) tx2 = ex; if (maskPR.y < ty1) ty1 = maskPR.y; if (ey > ty2) ty2 = ey; } else { for (y = maskPR.y; y < ey; y++, data1 += maskPR.rowstride) { for (x = maskPR.x, data = data1; x < ex; x++, data++) { if (*data) { minx = x; maxx = x; for (; x < ex; x++, data++) if (*data) maxx = x; if (minx < tx1) tx1 = minx; if (maxx > tx2) tx2 = maxx; if (y < ty1) ty1 = y; if (y > ty2) ty2 = y; } } } } } } tx2 = CLAMP (tx2 + 1, 0, GIMP_ITEM (channel)->width); ty2 = CLAMP (ty2 + 1, 0, GIMP_ITEM (channel)->height); if (tx1 == GIMP_ITEM (channel)->width && ty1 == GIMP_ITEM (channel)->height) { channel->empty = TRUE; channel->x1 = 0; channel->y1 = 0; channel->x2 = GIMP_ITEM (channel)->width; channel->y2 = GIMP_ITEM (channel)->height; } else { channel->empty = FALSE; channel->x1 = tx1; channel->y1 = ty1; channel->x2 = tx2; channel->y2 = ty2; } channel->bounds_known = TRUE; *x1 = channel->x1; *x2 = channel->x2; *y1 = channel->y1; *y2 = channel->y2; return ! channel->empty; } static gboolean gimp_channel_real_is_empty (GimpChannel *channel) { PixelRegion maskPR; guchar *data; gint x, y; gpointer pr; if (channel->bounds_known) return channel->empty; pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles, 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height, FALSE); for (pr = pixel_regions_register (1, &maskPR); pr != NULL; pr = pixel_regions_process (pr)) { /* check if any pixel in the channel is non-zero */ data = maskPR.data; for (y = 0; y < maskPR.h; y++) for (x = 0; x < maskPR.w; x++) if (*data++) { pixel_regions_process_stop (pr); return FALSE; } } /* The mask is empty, meaning we can set the bounds as known */ if (channel->segs_in) g_free (channel->segs_in); if (channel->segs_out) g_free (channel->segs_out); channel->empty = TRUE; channel->segs_in = NULL; channel->segs_out = NULL; channel->num_segs_in = 0; channel->num_segs_out = 0; channel->bounds_known = TRUE; channel->boundary_known = TRUE; channel->x1 = 0; channel->y1 = 0; channel->x2 = GIMP_ITEM (channel)->width; channel->y2 = GIMP_ITEM (channel)->height; return TRUE; } static gint gimp_channel_real_value (GimpChannel *channel, gint x, gint y) { Tile *tile; gint val; /* Some checks to cut back on unnecessary work */ if (channel->bounds_known) { if (channel->empty) return 0; else if (x < channel->x1 || x >= channel->x2 || y < channel->y1 || y >= channel->y2) return 0; } else { if (x < 0 || x >= GIMP_ITEM (channel)->width || y < 0 || y >= GIMP_ITEM (channel)->height) return 0; } tile = tile_manager_get_tile (GIMP_DRAWABLE (channel)->tiles, x, y, TRUE, FALSE); val = *(guchar *) (tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT)); tile_release (tile, FALSE); return val; } static void gimp_channel_real_feather (GimpChannel *channel, gdouble radius_x, gdouble radius_y, gboolean push_undo) { PixelRegion srcPR; if (push_undo) gimp_channel_push_undo (channel, GIMP_CHANNEL_GET_CLASS (channel)->feather_desc); else gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); pixel_region_init (&srcPR, GIMP_DRAWABLE (channel)->tiles, 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel)), FALSE); gaussian_blur_region (&srcPR, radius_x, radius_y); channel->bounds_known = FALSE; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel))); } static void gimp_channel_real_sharpen (GimpChannel *channel, gboolean push_undo) { PixelRegion maskPR; GimpLut *lut; if (push_undo) gimp_channel_push_undo (channel, GIMP_CHANNEL_GET_CLASS (channel)->sharpen_desc); else gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles, 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel)), TRUE); lut = threshold_lut_new (0.5, 1); pixel_regions_process_parallel ((p_func) gimp_lut_process_inline, lut, 1, &maskPR); gimp_lut_free (lut); channel->bounds_known = FALSE; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel))); } static void gimp_channel_real_clear (GimpChannel *channel, const gchar *undo_desc, gboolean push_undo) { PixelRegion maskPR; guchar bg = TRANSPARENT_OPACITY; if (push_undo) { if (! undo_desc) undo_desc = GIMP_CHANNEL_GET_CLASS (channel)->clear_desc; gimp_channel_push_undo (channel, undo_desc); } else { gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); } if (channel->bounds_known && !channel->empty) { pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles, channel->x1, channel->y1, (channel->x2 - channel->x1), (channel->y2 - channel->y1), TRUE); color_region (&maskPR, &bg); } else { /* clear the mask */ pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles, 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height, TRUE); color_region (&maskPR, &bg); } /* we know the bounds */ channel->bounds_known = TRUE; channel->empty = TRUE; channel->x1 = 0; channel->y1 = 0; channel->x2 = GIMP_ITEM (channel)->width; channel->y2 = GIMP_ITEM (channel)->height; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel))); } static void gimp_channel_real_all (GimpChannel *channel, gboolean push_undo) { PixelRegion maskPR; guchar bg = OPAQUE_OPACITY; if (push_undo) gimp_channel_push_undo (channel, GIMP_CHANNEL_GET_CLASS (channel)->all_desc); else gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); /* clear the channel */ pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles, 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height, TRUE); color_region (&maskPR, &bg); /* we know the bounds */ channel->bounds_known = TRUE; channel->empty = FALSE; channel->x1 = 0; channel->y1 = 0; channel->x2 = GIMP_ITEM (channel)->width; channel->y2 = GIMP_ITEM (channel)->height; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel))); } static void gimp_channel_real_invert (GimpChannel *channel, gboolean push_undo) { if (push_undo) gimp_channel_push_undo (channel, GIMP_CHANNEL_GET_CLASS (channel)->invert_desc); else gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); if (channel->bounds_known && channel->empty) { gimp_channel_all (channel, FALSE); } else { PixelRegion maskPR; GimpLut *lut; pixel_region_init (&maskPR, GIMP_DRAWABLE (channel)->tiles, 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height, TRUE); lut = invert_lut_new (1); pixel_regions_process_parallel ((p_func) gimp_lut_process_inline, lut, 1, &maskPR); gimp_lut_free (lut); channel->bounds_known = FALSE; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel))); } } static void gimp_channel_real_border (GimpChannel *channel, gint radius_x, gint radius_y, gboolean push_undo) { PixelRegion bPR; gint x1, y1, x2, y2; if (radius_x < 0 || radius_y < 0) return; if (! gimp_channel_bounds (channel, &x1, &y1, &x2, &y2)) return; if (gimp_channel_is_empty (channel)) return; if (x1 - radius_x < 0) x1 = 0; else x1 -= radius_x; if (x2 + radius_x > GIMP_ITEM (channel)->width) x2 = GIMP_ITEM (channel)->width; else x2 += radius_x; if (y1 - radius_y < 0) y1 = 0; else y1 -= radius_y; if (y2 + radius_y > GIMP_ITEM (channel)->height) y2 = GIMP_ITEM (channel)->height; else y2 += radius_y; if (push_undo) gimp_channel_push_undo (channel, GIMP_CHANNEL_GET_CLASS (channel)->border_desc); else gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles, x1, y1, (x2-x1), (y2-y1), TRUE); border_region (&bPR, radius_x, radius_y); channel->bounds_known = FALSE; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel))); } static void gimp_channel_real_grow (GimpChannel *channel, gint radius_x, gint radius_y, gboolean push_undo) { PixelRegion bPR; gint x1, y1, x2, y2; if (radius_x == 0 && radius_y == 0) return; if (radius_x <= 0 && radius_y <= 0) { gimp_channel_shrink (channel, -radius_x, -radius_y, FALSE, push_undo); return; } if (radius_x < 0 || radius_y < 0) return; if (! gimp_channel_bounds (channel, &x1, &y1, &x2, &y2)) return; if (gimp_channel_is_empty (channel)) return; if (x1 - radius_x > 0) x1 = x1 - radius_x; else x1 = 0; if (y1 - radius_y > 0) y1 = y1 - radius_y; else y1 = 0; if (x2 + radius_x < GIMP_ITEM (channel)->width) x2 = x2 + radius_x; else x2 = GIMP_ITEM (channel)->width; if (y2 + radius_y < GIMP_ITEM (channel)->height) y2 = y2 + radius_y; else y2 = GIMP_ITEM (channel)->height; if (push_undo) gimp_channel_push_undo (channel, GIMP_CHANNEL_GET_CLASS (channel)->grow_desc); else gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); /* need full extents for grow, not! */ pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles, x1, y1, (x2 - x1), (y2 - y1), TRUE); fatten_region (&bPR, radius_x, radius_y); channel->bounds_known = FALSE; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel))); } static void gimp_channel_real_shrink (GimpChannel *channel, gint radius_x, gint radius_y, gboolean edge_lock, gboolean push_undo) { PixelRegion bPR; gint x1, y1, x2, y2; if (radius_x == 0 && radius_y == 0) return; if (radius_x <= 0 && radius_y <= 0) { gimp_channel_grow (channel, -radius_x, -radius_y, push_undo); return; } if (radius_x < 0 || radius_y < 0) return; if (! gimp_channel_bounds (channel, &x1, &y1, &x2, &y2)) return; if (gimp_channel_is_empty (channel)) return; if (x1 > 0) x1--; if (y1 > 0) y1--; if (x2 < GIMP_ITEM (channel)->width) x2++; if (y2 < GIMP_ITEM (channel)->height) y2++; if (push_undo) gimp_channel_push_undo (channel, GIMP_CHANNEL_GET_CLASS (channel)->shrink_desc); else gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); pixel_region_init (&bPR, GIMP_DRAWABLE (channel)->tiles, x1, y1, (x2 - x1), (y2 - y1), TRUE); thin_region (&bPR, radius_x, radius_y, edge_lock); channel->bounds_known = FALSE; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, gimp_item_width (GIMP_ITEM (channel)), gimp_item_height (GIMP_ITEM (channel))); } static void gimp_channel_validate (TileManager *tm, Tile *tile) { /* Set the contents of the tile to empty */ memset (tile_data_pointer (tile, 0, 0), TRANSPARENT_OPACITY, tile_size (tile)); } /* public functions */ GimpChannel * gimp_channel_new (GimpImage *gimage, gint width, gint height, const gchar *name, const GimpRGB *color) { GimpChannel *channel; g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL); g_return_val_if_fail (color != NULL, NULL); channel = g_object_new (GIMP_TYPE_CHANNEL, NULL); gimp_drawable_configure (GIMP_DRAWABLE (channel), gimage, 0, 0, width, height, GIMP_GRAY_IMAGE, name); channel->color = *color; channel->show_masked = TRUE; /* selection mask variables */ channel->x2 = width; channel->y2 = height; return channel; } GimpChannel * gimp_channel_new_from_alpha (GimpImage *gimage, GimpDrawable *drawable, const gchar *name, const GimpRGB *color) { GimpChannel *channel; gint width; gint height; PixelRegion srcPR, destPR; g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL); g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL); g_return_val_if_fail (gimp_drawable_has_alpha (drawable), NULL); g_return_val_if_fail (color != NULL, NULL); width = gimp_item_width (GIMP_ITEM (drawable)); height = gimp_item_height (GIMP_ITEM (drawable)); channel = gimp_channel_new (gimage, width, height, name, color); gimp_channel_clear (channel, NULL, FALSE); pixel_region_init (&srcPR, gimp_drawable_data (drawable), 0, 0, width, height, FALSE); pixel_region_init (&destPR, gimp_drawable_data (GIMP_DRAWABLE (channel)), 0, 0, width, height, TRUE); extract_alpha_region (&srcPR, NULL, &destPR); channel->bounds_known = FALSE; return channel; } GimpChannel * gimp_channel_new_from_component (GimpImage *gimage, GimpChannelType type, const gchar *name, const GimpRGB *color) { GimpChannel *channel; TileManager *projection; PixelRegion src; PixelRegion dest; gint width; gint height; gint pixel; g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL); g_return_val_if_fail (color != NULL, NULL); pixel = gimp_image_get_component_index (gimage, type); g_return_val_if_fail (pixel != -1, NULL); projection = gimp_image_projection (gimage); width = tile_manager_width (projection); height = tile_manager_height (projection); channel = gimp_channel_new (gimage, width, height, name, color); pixel_region_init (&src, projection, 0, 0, width, height, FALSE); pixel_region_init (&dest, gimp_drawable_data (GIMP_DRAWABLE (channel)), 0, 0, width, height, TRUE); copy_component (&src, &dest, pixel); return channel; } void gimp_channel_set_color (GimpChannel *channel, const GimpRGB *color, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); g_return_if_fail (color != NULL); if (gimp_rgba_distance (&channel->color, color) > 0.0001) { if (push_undo) { GimpImage *gimage = gimp_item_get_image (GIMP_ITEM (channel)); if (gimage) gimp_image_undo_push_channel_color (gimage, _("Set Channel Color"), channel); } channel->color = *color; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height); } } void gimp_channel_get_color (const GimpChannel *channel, GimpRGB *color) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); g_return_if_fail (color != NULL); *color = channel->color; } gdouble gimp_channel_get_opacity (const GimpChannel *channel) { g_return_val_if_fail (GIMP_IS_CHANNEL (channel), GIMP_OPACITY_TRANSPARENT); return channel->color.a; } void gimp_channel_set_opacity (GimpChannel *channel, gdouble opacity, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); opacity = CLAMP (opacity, GIMP_OPACITY_TRANSPARENT, GIMP_OPACITY_OPAQUE); if (channel->color.a != opacity) { if (push_undo) { GimpImage *gimage = gimp_item_get_image (GIMP_ITEM (channel)); if (gimage) gimp_image_undo_push_channel_color (gimage, _("Set Channel Opacity"), channel); } channel->color.a = opacity; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height); } } gboolean gimp_channel_get_show_masked (GimpChannel *channel) { g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE); return channel->show_masked; } void gimp_channel_set_show_masked (GimpChannel *channel, gboolean show_masked) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); if (show_masked != channel->show_masked) { channel->show_masked = show_masked ? TRUE : FALSE; gimp_drawable_update (GIMP_DRAWABLE (channel), 0, 0, GIMP_ITEM (channel)->width, GIMP_ITEM (channel)->height); } } void gimp_channel_push_undo (GimpChannel *channel, const gchar *undo_desc) { GimpImage *gimage; g_return_if_fail (GIMP_IS_CHANNEL (channel)); gimage = gimp_item_get_image (GIMP_ITEM (channel)); g_return_if_fail (GIMP_IS_IMAGE (gimage)); gimp_image_undo_push_mask (gimage, undo_desc, channel); gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (channel)); } /******************************/ /* selection mask functions */ /******************************/ GimpChannel * gimp_channel_new_mask (GimpImage *gimage, gint width, gint height) { GimpRGB black = { 0.0, 0.0, 0.0, 0.5 }; GimpChannel *new_channel; g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL); new_channel = gimp_channel_new (gimage, width, height, _("Selection Mask"), &black); tile_manager_set_validate_proc (GIMP_DRAWABLE (new_channel)->tiles, gimp_channel_validate); return new_channel; } gboolean gimp_channel_boundary (GimpChannel *channel, const BoundSeg **segs_in, const BoundSeg **segs_out, gint *num_segs_in, gint *num_segs_out, gint x1, gint y1, gint x2, gint y2) { g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE); g_return_val_if_fail (segs_in != NULL, FALSE); g_return_val_if_fail (segs_out != NULL, FALSE); g_return_val_if_fail (num_segs_in != NULL, FALSE); g_return_val_if_fail (num_segs_out != NULL, FALSE); return GIMP_CHANNEL_GET_CLASS (channel)->boundary (channel, segs_in, segs_out, num_segs_in, num_segs_out, x1, y1, x2, y2); } gboolean gimp_channel_bounds (GimpChannel *channel, gint *x1, gint *y1, gint *x2, gint *y2) { g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE); g_return_val_if_fail (x1 != NULL, FALSE); g_return_val_if_fail (y1 != NULL, FALSE); g_return_val_if_fail (x2 != NULL, FALSE); g_return_val_if_fail (y2 != NULL, FALSE); return GIMP_CHANNEL_GET_CLASS (channel)->bounds (channel, x1, y1, x2, y2); } gboolean gimp_channel_is_empty (GimpChannel *channel) { g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE); return GIMP_CHANNEL_GET_CLASS (channel)->is_empty (channel); } gint gimp_channel_value (GimpChannel *channel, gint x, gint y) { g_return_val_if_fail (GIMP_IS_CHANNEL (channel), 0); return GIMP_CHANNEL_GET_CLASS (channel)->value (channel, x, y); } void gimp_channel_feather (GimpChannel *channel, gdouble radius_x, gdouble radius_y, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); GIMP_CHANNEL_GET_CLASS (channel)->feather (channel, radius_x, radius_y, push_undo); } void gimp_channel_sharpen (GimpChannel *channel, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); GIMP_CHANNEL_GET_CLASS (channel)->sharpen (channel, push_undo); } void gimp_channel_clear (GimpChannel *channel, const gchar *undo_desc, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); GIMP_CHANNEL_GET_CLASS (channel)->clear (channel, undo_desc, push_undo); } void gimp_channel_all (GimpChannel *channel, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); GIMP_CHANNEL_GET_CLASS (channel)->all (channel, push_undo); } void gimp_channel_invert (GimpChannel *channel, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); GIMP_CHANNEL_GET_CLASS (channel)->invert (channel, push_undo); } void gimp_channel_border (GimpChannel *channel, gint radius_x, gint radius_y, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); GIMP_CHANNEL_GET_CLASS (channel)->border (channel, radius_x, radius_y, push_undo); } void gimp_channel_grow (GimpChannel *channel, gint radius_x, gint radius_y, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); GIMP_CHANNEL_GET_CLASS (channel)->grow (channel, radius_x, radius_y, push_undo); } void gimp_channel_shrink (GimpChannel *channel, gint radius_x, gint radius_y, gboolean edge_lock, gboolean push_undo) { g_return_if_fail (GIMP_IS_CHANNEL (channel)); GIMP_CHANNEL_GET_CLASS (channel)->shrink (channel, radius_x, radius_y, edge_lock, push_undo); }