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957d76fd14
Not sure what I had in mind with the class method copy() in libgimp GimpLayer. The core duplicate code already takes care of returning an object of the right type. Also the GimpTextLayer implementation was not a perfect copy (only text, font and font size were copied). Now it is because, again, core has all the duplication code necessary. Finally this makes this function visible to PDB, hence Script-Fu, again.
235 lines
6.8 KiB
C
235 lines
6.8 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-2000 Peter Mattis and Spencer Kimball
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*
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* gimplayer.c
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*
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* This library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include "gimp.h"
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G_DEFINE_TYPE (GimpLayer, gimp_layer, GIMP_TYPE_DRAWABLE)
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#define parent_class gimp_layer_parent_class
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static void
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gimp_layer_class_init (GimpLayerClass *klass)
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{
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}
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static void
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gimp_layer_init (GimpLayer *layer)
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{
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}
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/* Public API. */
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/**
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* gimp_layer_get_by_id:
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* @layer_id: The layer id.
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*
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* Returns a #GimpLayer representing @layer_id. This function calls
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* gimp_item_get_by_id() and returns the item if it is layer or %NULL
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* otherwise.
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*
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* Returns: (nullable) (transfer none): a #GimpLayer for @layer_id or
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* %NULL if @layer_id does not represent a valid layer. The
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* object belongs to libgimp and you must not modify or unref
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* it.
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*
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* Since: 3.0
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**/
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GimpLayer *
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gimp_layer_get_by_id (gint32 layer_id)
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{
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GimpItem *item = gimp_item_get_by_id (layer_id);
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if (GIMP_IS_LAYER (item))
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return (GimpLayer *) item;
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return NULL;
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}
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/**
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* gimp_layer_new_from_pixbuf:
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* @image: The RGB image to which to add the layer.
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* @name: The layer name.
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* @pixbuf: A GdkPixbuf.
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* @opacity: The layer opacity.
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* @mode: The layer combination mode.
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* @progress_start: start of progress
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* @progress_end: end of progress
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*
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* Create a new layer from a %GdkPixbuf.
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*
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* This procedure creates a new layer from the given %GdkPixbuf. The
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* image has to be an RGB image and just like with gimp_layer_new()
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* you will still need to add the layer to it.
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*
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* If you pass @progress_end > @progress_start to this function,
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* gimp_progress_update() will be called for. You have to call
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* gimp_progress_init() beforehand then.
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*
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* Returns: (transfer none): The newly created layer.
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* The object belongs to libgimp and you should not free it.
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*
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* Since: 2.2
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*/
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GimpLayer *
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gimp_layer_new_from_pixbuf (GimpImage *image,
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const gchar *name,
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GdkPixbuf *pixbuf,
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gdouble opacity,
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GimpLayerMode mode,
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gdouble progress_start,
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gdouble progress_end)
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{
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GeglBuffer *dest_buffer;
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GimpLayer *layer;
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gint width;
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gint height;
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gint bpp;
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gdouble range = progress_end - progress_start;
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g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
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if (gimp_image_get_base_type (image) != GIMP_RGB)
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{
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g_warning ("gimp_layer_new_from_pixbuf() needs an RGB image");
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return NULL;
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}
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if (gdk_pixbuf_get_colorspace (pixbuf) != GDK_COLORSPACE_RGB)
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{
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g_warning ("gimp_layer_new_from_pixbuf() assumes that GdkPixbuf is RGB");
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return NULL;
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}
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width = gdk_pixbuf_get_width (pixbuf);
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height = gdk_pixbuf_get_height (pixbuf);
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bpp = gdk_pixbuf_get_n_channels (pixbuf);
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layer = gimp_layer_new (image, name, width, height,
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bpp == 3 ? GIMP_RGB_IMAGE : GIMP_RGBA_IMAGE,
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opacity, mode);
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if (! layer)
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return NULL;
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dest_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
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gegl_buffer_set (dest_buffer, GEGL_RECTANGLE (0, 0, width, height), 0,
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gimp_pixbuf_get_format (pixbuf),
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gdk_pixbuf_get_pixels (pixbuf),
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gdk_pixbuf_get_rowstride (pixbuf));
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g_object_unref (dest_buffer);
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if (range > 0.0)
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gimp_progress_update (progress_end);
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return layer;
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}
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/**
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* gimp_layer_new_from_surface:
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* @image: The RGB image to which to add the layer.
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* @name: The layer name.
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* @surface: A Cairo image surface.
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* @progress_start: start of progress
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* @progress_end: end of progress
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*
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* Create a new layer from a [type@cairo.Surface].
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*
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* This procedure creates a new layer from the given
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* [type@cairo.Surface]. The image has to be an RGB image and just like
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* with gimp_layer_new() you will still need to add the layer to it.
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*
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* If you pass @progress_end > @progress_start to this function,
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* gimp_progress_update() will be called for. You have to call
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* gimp_progress_init() beforehand then.
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*
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* Returns: (transfer none): The newly created layer.
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* The object belongs to libgimp and you should not free it.
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*
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* Since: 2.8
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*/
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GimpLayer *
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gimp_layer_new_from_surface (GimpImage *image,
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const gchar *name,
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cairo_surface_t *surface,
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gdouble progress_start,
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gdouble progress_end)
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{
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GeglBuffer *src_buffer;
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GeglBuffer *dest_buffer;
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GimpLayer *layer;
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gint width;
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gint height;
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cairo_format_t format;
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gdouble range = progress_end - progress_start;
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g_return_val_if_fail (surface != NULL, NULL);
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g_return_val_if_fail (cairo_surface_get_type (surface) ==
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CAIRO_SURFACE_TYPE_IMAGE, NULL);
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if (gimp_image_get_base_type (image) != GIMP_RGB)
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{
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g_warning ("gimp_layer_new_from_surface() needs an RGB image");
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return NULL;
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}
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width = cairo_image_surface_get_width (surface);
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height = cairo_image_surface_get_height (surface);
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format = cairo_image_surface_get_format (surface);
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if (format != CAIRO_FORMAT_ARGB32 &&
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format != CAIRO_FORMAT_RGB24)
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{
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g_warning ("gimp_layer_new_from_surface() assumes that surface is RGB");
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return NULL;
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}
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layer = gimp_layer_new (image, name, width, height,
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format == CAIRO_FORMAT_RGB24 ?
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GIMP_RGB_IMAGE : GIMP_RGBA_IMAGE,
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100.0,
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gimp_image_get_default_new_layer_mode (image));
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if (layer == NULL)
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return NULL;
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src_buffer = gimp_cairo_surface_create_buffer (surface, NULL);
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dest_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
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gegl_buffer_copy (src_buffer, NULL, GEGL_ABYSS_NONE,
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dest_buffer, NULL);
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g_object_unref (src_buffer);
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g_object_unref (dest_buffer);
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if (range > 0.0)
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gimp_progress_update (progress_end);
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return layer;
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}
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