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Diffstat (limited to 'app/pdb/gimppdb-utils.c')
| -rw-r--r-- | app/pdb/gimppdb-utils.c | 846 |
1 files changed, 846 insertions, 0 deletions
diff --git a/app/pdb/gimppdb-utils.c b/app/pdb/gimppdb-utils.c new file mode 100644 index 0000000..b5d2eda --- /dev/null +++ b/app/pdb/gimppdb-utils.c @@ -0,0 +1,846 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995-2003 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 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 <string.h> + +#include <gdk-pixbuf/gdk-pixbuf.h> +#include <gegl.h> + +#include "pdb-types.h" + +#include "core/gimp.h" +#include "core/gimpbrushgenerated.h" +#include "core/gimpchannel.h" +#include "core/gimpcontainer.h" +#include "core/gimpdatafactory.h" +#include "core/gimpdrawable.h" +#include "core/gimpimage.h" +#include "core/gimpimage-guides.h" +#include "core/gimpimage-sample-points.h" +#include "core/gimpitem.h" + +#include "text/gimptextlayer.h" + +#include "vectors/gimpvectors.h" + +#include "gimppdb-utils.h" +#include "gimppdberror.h" + +#include "gimp-intl.h" + + +static GimpObject * +gimp_pdb_get_data_factory_item (GimpDataFactory *factory, + const gchar *name) +{ + GimpObject *object; + + object = gimp_container_get_child_by_name (gimp_data_factory_get_container (factory), name); + + if (! object) + object = gimp_container_get_child_by_name (gimp_data_factory_get_container_obsolete (factory), name); + + if (! object && ! strcmp (name, "Standard")) + { + Gimp *gimp = gimp_data_factory_get_gimp (factory); + + object = (GimpObject *) + gimp_data_factory_data_get_standard (factory, + gimp_get_user_context (gimp)); + } + + return object; +} + + +GimpBrush * +gimp_pdb_get_brush (Gimp *gimp, + const gchar *name, + GimpPDBDataAccess access, + GError **error) +{ + GimpBrush *brush; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! name || ! strlen (name)) + { + g_set_error_literal (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Invalid empty brush name")); + return NULL; + } + + brush = (GimpBrush *) gimp_pdb_get_data_factory_item (gimp->brush_factory, name); + + if (! brush) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Brush '%s' not found"), name); + } + else if ((access & GIMP_PDB_DATA_ACCESS_WRITE) && + ! gimp_data_is_writable (GIMP_DATA (brush))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Brush '%s' is not editable"), name); + return NULL; + } + else if ((access & GIMP_PDB_DATA_ACCESS_RENAME) && + ! gimp_viewable_is_name_editable (GIMP_VIEWABLE (brush))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Brush '%s' is not renamable"), name); + return NULL; + } + + return brush; +} + +GimpBrush * +gimp_pdb_get_generated_brush (Gimp *gimp, + const gchar *name, + GimpPDBDataAccess access, + GError **error) +{ + GimpBrush *brush; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + brush = gimp_pdb_get_brush (gimp, name, access, error); + + if (! brush) + return NULL; + + if (! GIMP_IS_BRUSH_GENERATED (brush)) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Brush '%s' is not a generated brush"), name); + return NULL; + } + + return brush; +} + +GimpDynamics * +gimp_pdb_get_dynamics (Gimp *gimp, + const gchar *name, + GimpPDBDataAccess access, + GError **error) +{ + GimpDynamics *dynamics; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! name || ! strlen (name)) + { + g_set_error_literal (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Invalid empty paint dynamics name")); + return NULL; + } + + dynamics = (GimpDynamics *) gimp_pdb_get_data_factory_item (gimp->dynamics_factory, name); + + if (! dynamics) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Paint dynamics '%s' not found"), name); + } + else if ((access & GIMP_PDB_DATA_ACCESS_WRITE) && + ! gimp_data_is_writable (GIMP_DATA (dynamics))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Paint dynamics '%s' is not editable"), name); + return NULL; + } + else if ((access & GIMP_PDB_DATA_ACCESS_RENAME) && + ! gimp_viewable_is_name_editable (GIMP_VIEWABLE (dynamics))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Paint dynamics '%s' is not renamable"), name); + return NULL; + } + + return dynamics; +} + +GimpMybrush * +gimp_pdb_get_mybrush (Gimp *gimp, + const gchar *name, + GimpPDBDataAccess access, + GError **error) +{ + GimpMybrush *brush; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! name || ! strlen (name)) + { + g_set_error_literal (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Invalid empty MyPaint brush name")); + return NULL; + } + + brush = (GimpMybrush *) gimp_pdb_get_data_factory_item (gimp->mybrush_factory, name); + + if (! brush) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("MyPaint brush '%s' not found"), name); + } + else if ((access & GIMP_PDB_DATA_ACCESS_WRITE) && + ! gimp_data_is_writable (GIMP_DATA (brush))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("MyPaint brush '%s' is not editable"), name); + return NULL; + } + else if ((access & GIMP_PDB_DATA_ACCESS_RENAME) && + ! gimp_viewable_is_name_editable (GIMP_VIEWABLE (brush))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("MyPaint brush '%s' is not renamable"), name); + return NULL; + } + + return brush; +} + +GimpPattern * +gimp_pdb_get_pattern (Gimp *gimp, + const gchar *name, + GError **error) +{ + GimpPattern *pattern; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! name || ! strlen (name)) + { + g_set_error_literal (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Invalid empty pattern name")); + return NULL; + } + + pattern = (GimpPattern *) gimp_pdb_get_data_factory_item (gimp->pattern_factory, name); + + if (! pattern) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Pattern '%s' not found"), name); + } + + return pattern; +} + +GimpGradient * +gimp_pdb_get_gradient (Gimp *gimp, + const gchar *name, + GimpPDBDataAccess access, + GError **error) +{ + GimpGradient *gradient; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! name || ! strlen (name)) + { + g_set_error_literal (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Invalid empty gradient name")); + return NULL; + } + + gradient = (GimpGradient *) gimp_pdb_get_data_factory_item (gimp->gradient_factory, name); + + if (! gradient) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Gradient '%s' not found"), name); + } + else if ((access & GIMP_PDB_DATA_ACCESS_WRITE) && + ! gimp_data_is_writable (GIMP_DATA (gradient))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Gradient '%s' is not editable"), name); + return NULL; + } + else if ((access & GIMP_PDB_DATA_ACCESS_RENAME) && + ! gimp_viewable_is_name_editable (GIMP_VIEWABLE (gradient))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Gradient '%s' is not renamable"), name); + return NULL; + } + + return gradient; +} + +GimpPalette * +gimp_pdb_get_palette (Gimp *gimp, + const gchar *name, + GimpPDBDataAccess access, + GError **error) +{ + GimpPalette *palette; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! name || ! strlen (name)) + { + g_set_error_literal (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Invalid empty palette name")); + return NULL; + } + + palette = (GimpPalette *) gimp_pdb_get_data_factory_item (gimp->palette_factory, name); + + if (! palette) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Palette '%s' not found"), name); + } + else if ((access & GIMP_PDB_DATA_ACCESS_WRITE) && + ! gimp_data_is_writable (GIMP_DATA (palette))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Palette '%s' is not editable"), name); + return NULL; + } + else if ((access & GIMP_PDB_DATA_ACCESS_RENAME) && + ! gimp_viewable_is_name_editable (GIMP_VIEWABLE (palette))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Palette '%s' is not renamable"), name); + return NULL; + } + + return palette; +} + +GimpFont * +gimp_pdb_get_font (Gimp *gimp, + const gchar *name, + GError **error) +{ + GimpFont *font; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! name || ! strlen (name)) + { + g_set_error_literal (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Invalid empty font name")); + return NULL; + } + + font = (GimpFont *) gimp_pdb_get_data_factory_item (gimp->font_factory, name); + + if (! font) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Font '%s' not found"), name); + } + + return font; +} + +GimpBuffer * +gimp_pdb_get_buffer (Gimp *gimp, + const gchar *name, + GError **error) +{ + GimpBuffer *buffer; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! name || ! strlen (name)) + { + g_set_error_literal (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Invalid empty buffer name")); + return NULL; + } + + buffer = (GimpBuffer *) + gimp_container_get_child_by_name (gimp->named_buffers, name); + + if (! buffer) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Named buffer '%s' not found"), name); + } + + return buffer; +} + +GimpPaintInfo * +gimp_pdb_get_paint_info (Gimp *gimp, + const gchar *name, + GError **error) +{ + GimpPaintInfo *paint_info; + + g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! name || ! strlen (name)) + { + g_set_error_literal (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Invalid empty paint method name")); + return NULL; + } + + paint_info = (GimpPaintInfo *) + gimp_container_get_child_by_name (gimp->paint_info_list, name); + + if (! paint_info) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Paint method '%s' does not exist"), name); + } + + return paint_info; +} + +gboolean +gimp_pdb_item_is_attached (GimpItem *item, + GimpImage *image, + GimpPDBItemModify modify, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_ITEM (item), FALSE); + g_return_val_if_fail (image == NULL || GIMP_IS_IMAGE (image), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (! gimp_item_is_attached (item)) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Item '%s' (%d) cannot be used because it has not " + "been added to an image"), + gimp_object_get_name (item), + gimp_item_get_ID (item)); + return FALSE; + } + + if (image && image != gimp_item_get_image (item)) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Item '%s' (%d) cannot be used because it is " + "attached to another image"), + gimp_object_get_name (item), + gimp_item_get_ID (item)); + return FALSE; + } + + return gimp_pdb_item_is_modifiable (item, modify, error); +} + +gboolean +gimp_pdb_item_is_in_tree (GimpItem *item, + GimpImage *image, + GimpPDBItemModify modify, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_ITEM (item), FALSE); + g_return_val_if_fail (image == NULL || GIMP_IS_IMAGE (image), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (! gimp_pdb_item_is_attached (item, image, modify, error)) + return FALSE; + + if (! gimp_item_get_tree (item)) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Item '%s' (%d) cannot be used because it is not " + "a direct child of an item tree"), + gimp_object_get_name (item), + gimp_item_get_ID (item)); + return FALSE; + } + + return TRUE; +} + +gboolean +gimp_pdb_item_is_in_same_tree (GimpItem *item, + GimpItem *item2, + GimpImage *image, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_ITEM (item), FALSE); + g_return_val_if_fail (GIMP_IS_ITEM (item2), FALSE); + g_return_val_if_fail (image == NULL || GIMP_IS_IMAGE (image), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (! gimp_pdb_item_is_in_tree (item, image, FALSE, error) || + ! gimp_pdb_item_is_in_tree (item2, image, FALSE, error)) + return FALSE; + + if (gimp_item_get_tree (item) != gimp_item_get_tree (item2)) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Items '%s' (%d) and '%s' (%d) cannot be used " + "because they are not part of the same item tree"), + gimp_object_get_name (item), + gimp_item_get_ID (item), + gimp_object_get_name (item2), + gimp_item_get_ID (item2)); + return FALSE; + } + + return TRUE; +} + +gboolean +gimp_pdb_item_is_not_ancestor (GimpItem *item, + GimpItem *not_descendant, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_ITEM (item), FALSE); + g_return_val_if_fail (GIMP_IS_ITEM (not_descendant), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (gimp_viewable_is_ancestor (GIMP_VIEWABLE (item), + GIMP_VIEWABLE (not_descendant))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Item '%s' (%d) must not be an ancestor of " + "'%s' (%d)"), + gimp_object_get_name (item), + gimp_item_get_ID (item), + gimp_object_get_name (not_descendant), + gimp_item_get_ID (not_descendant)); + return FALSE; + } + + return TRUE; +} + +gboolean +gimp_pdb_item_is_floating (GimpItem *item, + GimpImage *dest_image, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_ITEM (item), FALSE); + g_return_val_if_fail (GIMP_IS_IMAGE (dest_image), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (! g_object_is_floating (item)) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Item '%s' (%d) has already been added to an image"), + gimp_object_get_name (item), + gimp_item_get_ID (item)); + return FALSE; + } + else if (gimp_item_get_image (item) != dest_image) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Trying to add item '%s' (%d) to wrong image"), + gimp_object_get_name (item), + gimp_item_get_ID (item)); + return FALSE; + } + + return TRUE; +} + +gboolean +gimp_pdb_item_is_modifiable (GimpItem *item, + GimpPDBItemModify modify, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_ITEM (item), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + /* When a channel is position-locked, it is also implicitly + * content-locked because we translate channels by modifying their + * pixels. + */ + if ((modify & GIMP_PDB_ITEM_POSITION) && GIMP_IS_CHANNEL (item)) + modify |= GIMP_PDB_ITEM_CONTENT; + + if ((modify & GIMP_PDB_ITEM_CONTENT) && gimp_item_is_content_locked (item)) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Item '%s' (%d) cannot be modified because its " + "contents are locked"), + gimp_object_get_name (item), + gimp_item_get_ID (item)); + return FALSE; + } + + if ((modify & GIMP_PDB_ITEM_POSITION) && gimp_item_is_position_locked (item)) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Item '%s' (%d) cannot be modified because its " + "position and size are locked"), + gimp_object_get_name (item), + gimp_item_get_ID (item)); + return FALSE; + } + + return TRUE; +} + +gboolean +gimp_pdb_item_is_group (GimpItem *item, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_ITEM (item), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (! gimp_viewable_get_children (GIMP_VIEWABLE (item))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Item '%s' (%d) cannot be used because it is " + "not a group item"), + gimp_object_get_name (item), + gimp_item_get_ID (item)); + return FALSE; + } + + return TRUE; +} + +gboolean +gimp_pdb_item_is_not_group (GimpItem *item, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_ITEM (item), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (gimp_viewable_get_children (GIMP_VIEWABLE (item))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Item '%s' (%d) cannot be modified because it " + "is a group item"), + gimp_object_get_name (item), + gimp_item_get_ID (item)); + return FALSE; + } + + return TRUE; +} + +gboolean +gimp_pdb_layer_is_text_layer (GimpLayer *layer, + GimpPDBItemModify modify, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (! gimp_item_is_text_layer (GIMP_ITEM (layer))) + { + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Layer '%s' (%d) cannot be used because it is not " + "a text layer"), + gimp_object_get_name (layer), + gimp_item_get_ID (GIMP_ITEM (layer))); + + return FALSE; + } + + return gimp_pdb_item_is_attached (GIMP_ITEM (layer), NULL, modify, error); +} + +static const gchar * +gimp_pdb_enum_value_get_nick (GType enum_type, + gint value) +{ + GEnumClass *enum_class; + GEnumValue *enum_value; + const gchar *nick; + + enum_class = g_type_class_ref (enum_type); + enum_value = g_enum_get_value (enum_class, value); + + nick = enum_value->value_nick; + + g_type_class_unref (enum_class); + + return nick; +} + +gboolean +gimp_pdb_image_is_base_type (GimpImage *image, + GimpImageBaseType type, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (gimp_image_get_base_type (image) == type) + return TRUE; + + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Image '%s' (%d) is of type '%s', " + "but an image of type '%s' is expected"), + gimp_image_get_display_name (image), + gimp_image_get_ID (image), + gimp_pdb_enum_value_get_nick (GIMP_TYPE_IMAGE_BASE_TYPE, + gimp_image_get_base_type (image)), + gimp_pdb_enum_value_get_nick (GIMP_TYPE_IMAGE_BASE_TYPE, type)); + + return FALSE; +} + +gboolean +gimp_pdb_image_is_not_base_type (GimpImage *image, + GimpImageBaseType type, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (gimp_image_get_base_type (image) != type) + return TRUE; + + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Image '%s' (%d) must not be of type '%s'"), + gimp_image_get_display_name (image), + gimp_image_get_ID (image), + gimp_pdb_enum_value_get_nick (GIMP_TYPE_IMAGE_BASE_TYPE, type)); + + return FALSE; +} + +gboolean +gimp_pdb_image_is_precision (GimpImage *image, + GimpPrecision precision, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (gimp_image_get_precision (image) == precision) + return TRUE; + + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Image '%s' (%d) has precision '%s', " + "but an image of precision '%s' is expected"), + gimp_image_get_display_name (image), + gimp_image_get_ID (image), + gimp_pdb_enum_value_get_nick (GIMP_TYPE_PRECISION, + gimp_image_get_precision (image)), + gimp_pdb_enum_value_get_nick (GIMP_TYPE_PRECISION, precision)); + + return FALSE; +} + +gboolean +gimp_pdb_image_is_not_precision (GimpImage *image, + GimpPrecision precision, + GError **error) +{ + g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE); + g_return_val_if_fail (error == NULL || *error == NULL, FALSE); + + if (gimp_image_get_precision (image) != precision) + return TRUE; + + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Image '%s' (%d) must not be of precision '%s'"), + gimp_image_get_display_name (image), + gimp_image_get_ID (image), + gimp_pdb_enum_value_get_nick (GIMP_TYPE_PRECISION, precision)); + + return FALSE; +} + +GimpGuide * +gimp_pdb_image_get_guide (GimpImage *image, + gint guide_ID, + GError **error) +{ + GimpGuide *guide; + + g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + guide = gimp_image_get_guide (image, guide_ID); + + if (guide) + return guide; + + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Image '%s' (%d) does not contain guide with ID %d"), + gimp_image_get_display_name (image), + gimp_image_get_ID (image), + guide_ID); + return NULL; +} + +GimpSamplePoint * +gimp_pdb_image_get_sample_point (GimpImage *image, + gint sample_point_ID, + GError **error) +{ + GimpSamplePoint *sample_point; + + g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + sample_point = gimp_image_get_sample_point (image, sample_point_ID); + + if (sample_point) + return sample_point; + + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Image '%s' (%d) does not contain sample point with ID %d"), + gimp_image_get_display_name (image), + gimp_image_get_ID (image), + sample_point_ID); + return NULL; +} + +GimpStroke * +gimp_pdb_get_vectors_stroke (GimpVectors *vectors, + gint stroke_ID, + GimpPDBItemModify modify, + GError **error) +{ + GimpStroke *stroke = NULL; + + g_return_val_if_fail (GIMP_IS_VECTORS (vectors), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (! gimp_pdb_item_is_not_group (GIMP_ITEM (vectors), error)) + return NULL; + + if (! modify || gimp_pdb_item_is_modifiable (GIMP_ITEM (vectors), + modify, error)) + { + stroke = gimp_vectors_stroke_get_by_ID (vectors, stroke_ID); + + if (! stroke) + g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT, + _("Vectors object %d does not contain stroke with ID %d"), + gimp_item_get_ID (GIMP_ITEM (vectors)), stroke_ID); + } + + return stroke; +} |