140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/* LIBPIKA - The PIKA Library
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* Copyright (C) 1995-2000 Peter Mattis and Spencer Kimball
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*
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* pikatextlayer.c
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* Copyright (C) 2022 Jehan
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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 "pika.h"
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struct _PikaTextLayer
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{
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PikaLayer parent_instance;
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};
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static PikaLayer * pika_text_layer_copy (PikaLayer *layer);
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G_DEFINE_TYPE (PikaTextLayer, pika_text_layer, PIKA_TYPE_LAYER)
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#define parent_class pika_text_layer_parent_class
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static void
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pika_text_layer_class_init (PikaTextLayerClass *klass)
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{
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PikaLayerClass *layer_class = PIKA_LAYER_CLASS (klass);
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layer_class->copy = pika_text_layer_copy;
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}
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static void
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pika_text_layer_init (PikaTextLayer *layer)
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{
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}
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/* Public API. */
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/**
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* pika_text_layer_get_by_id:
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* @layer_id: The layer id.
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*
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* Returns a #PikaTextLayer representing @layer_id. This function calls
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* pika_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 #PikaTextLayer 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 libpika 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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PikaTextLayer *
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pika_text_layer_get_by_id (gint32 layer_id)
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{
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PikaItem *item = pika_item_get_by_id (layer_id);
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if (PIKA_IS_TEXT_LAYER (item))
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return (PikaTextLayer *) item;
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return NULL;
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}
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/**
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* pika_text_layer_new:
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* @image: The image to which to add the layer.
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* @text: The text to generate (in UTF-8 encoding).
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* @font: The name of the font.
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* @size: The size of text in either pixels or points.
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* @unit: The units of specified size.
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*
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* Create a new layer.
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*
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* This procedure creates a new text layer displaying the specified @text. By
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* default the width and height of the layer will be determined by the @text
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* contents, the @fontname, @size and @unit.
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*
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* The new layer still needs to be added to the image, as this is not automatic.
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* Add the new layer with the pika_image_insert_layer() command. Other
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* attributes such as layer mask modes, and offsets should be set with explicit
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* procedure calls.
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*
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* Returns: (transfer none): The newly created text layer.
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* The object belongs to libpika and you should not free it.
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*
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* Since: 3.0
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*/
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PikaTextLayer *
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pika_text_layer_new (PikaImage *image,
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const gchar *text,
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PikaFont *font,
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gdouble size,
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PikaUnit unit)
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{
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return _pika_text_layer_new (image, text, font, size, unit);
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}
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/* private functions */
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static PikaLayer *
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pika_text_layer_copy (PikaLayer *layer)
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{
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PikaTextLayer *new_layer;
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gchar *text;
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PikaFont *font;
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gdouble size;
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PikaUnit unit;
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g_return_val_if_fail (PIKA_IS_TEXT_LAYER (layer), NULL);
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text = pika_text_layer_get_text (PIKA_TEXT_LAYER (layer));
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font = pika_text_layer_get_font (PIKA_TEXT_LAYER (layer));
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size = pika_text_layer_get_font_size (PIKA_TEXT_LAYER (layer), &unit);
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new_layer = pika_text_layer_new (pika_item_get_image (PIKA_ITEM (layer)),
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text, font, size, unit);
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g_free (text);
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return PIKA_LAYER (new_layer);
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}
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