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gimp/libgimp/gimplayer.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-2000 Peter Mattis and Spencer Kimball
*
* gimplayer.c
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#define GIMP_DISABLE_DEPRECATION_WARNINGS
#include "gimp.h"
/**
* gimp_layer_new:
* @image_ID: The image to which to add the layer.
* @name: The layer name.
* @width: The layer width.
* @height: The layer height.
* @type: The layer type.
* @opacity: The layer opacity.
* @mode: The layer combination mode.
*
* Create a new layer.
*
* This procedure creates a new layer with the specified width, height,
* and type. Name, opacity, and mode are also supplied parameters. The
* new layer still needs to be added to the image, as this is not
* automatic. Add the new layer with the gimp_image_insert_layer()
* command. Other attributes such as layer mask modes, and offsets
* should be set with explicit procedure calls.
*
* Returns: The newly created layer.
*/
gint32
gimp_layer_new (gint32 image_ID,
const gchar *name,
gint width,
gint height,
GimpImageType type,
gdouble opacity,
GimpLayerMode mode)
{
return _gimp_layer_new (image_ID,
width,
height,
type,
name,
opacity,
mode);
}
/**
* gimp_layer_copy:
* @layer_ID: The layer to copy.
*
* Copy a layer.
*
* This procedure copies the specified layer and returns the copy. The
* newly copied layer is for use within the original layer's image. It
* should not be subsequently added to any other image.
*
* Returns: The newly copied layer.
*/
gint32
gimp_layer_copy (gint32 layer_ID)
{
return _gimp_layer_copy (layer_ID, FALSE);
}
/**
* gimp_layer_new_from_pixbuf:
* @image_ID: The RGB image to which to add the layer.
* @name: The layer name.
* @pixbuf: A GdkPixbuf.
* @opacity: The layer opacity.
* @mode: The layer combination mode.
* @progress_start: start of progress
* @progress_end: end of progress
*
* Create a new layer from a %GdkPixbuf.
*
* This procedure creates a new layer from the given %GdkPixbuf. The
* image has to be an RGB image and just like with gimp_layer_new()
* you will still need to add the layer to it.
*
* If you pass @progress_end > @progress_start to this function,
* gimp_progress_update() will be called for. You have to call
* gimp_progress_init() beforehand then.
*
* Returns: The newly created layer.
*
* Since: 2.4
*/
gint32
gimp_layer_new_from_pixbuf (gint32 image_ID,
const gchar *name,
GdkPixbuf *pixbuf,
gdouble opacity,
GimpLayerMode mode,
gdouble progress_start,
gdouble progress_end)
{
gint32 layer;
gint width;
gint height;
gint bpp;
gdouble range = progress_end - progress_start;
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), -1);
if (gimp_image_base_type (image_ID) != GIMP_RGB)
{
g_warning ("gimp_layer_new_from_pixbuf() needs an RGB image");
return -1;
}
if (gdk_pixbuf_get_colorspace (pixbuf) != GDK_COLORSPACE_RGB)
{
g_warning ("gimp_layer_new_from_pixbuf() assumes that GdkPixbuf is RGB");
return -1;
}
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
bpp = gdk_pixbuf_get_n_channels (pixbuf);
layer = gimp_layer_new (image_ID, name, width, height,
bpp == 3 ? GIMP_RGB_IMAGE : GIMP_RGBA_IMAGE,
opacity, mode);
if (layer == -1)
return -1;
if (gimp_plugin_precision_enabled ())
{
GeglBuffer *dest_buffer;
dest_buffer = gimp_drawable_get_buffer (layer);
gegl_buffer_set (dest_buffer, GEGL_RECTANGLE (0, 0, width, height), 0,
gimp_pixbuf_get_format (pixbuf),
gdk_pixbuf_get_pixels (pixbuf),
gdk_pixbuf_get_rowstride (pixbuf));
g_object_unref (dest_buffer);
}
else
{
GimpDrawable *drawable;
GimpPixelRgn rgn;
gpointer pr;
const guchar *pixels;
gint rowstride;
guint done = 0;
guint count = 0;
drawable = gimp_drawable_get (layer);
gimp_pixel_rgn_init (&rgn, drawable, 0, 0, width, height, TRUE, FALSE);
g_assert (bpp == rgn.bpp);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
for (pr = gimp_pixel_rgns_register (1, &rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
const guchar *src = pixels + rgn.y * rowstride + rgn.x * bpp;
guchar *dest = rgn.data;
gint y;
for (y = 0; y < rgn.h; y++)
{
memcpy (dest, src, rgn.w * rgn.bpp);
src += rowstride;
dest += rgn.rowstride;
}
if (range > 0.0)
{
done += rgn.h * rgn.w;
if (count++ % 32 == 0)
gimp_progress_update (progress_start +
(gdouble) done / (width * height) * range);
}
}
gimp_drawable_detach (drawable);
}
if (range > 0.0)
gimp_progress_update (progress_end);
return layer;
}
/**
* gimp_layer_new_from_surface:
* @image_ID: The RGB image to which to add the layer.
* @name: The layer name.
* @surface: A Cairo image surface.
* @progress_start: start of progress
* @progress_end: end of progress
*
* Create a new layer from a #cairo_surface_t.
*
* This procedure creates a new layer from the given
* #cairo_surface_t. The image has to be an RGB image and just like
* with gimp_layer_new() you will still need to add the layer to it.
*
* If you pass @progress_end > @progress_start to this function,
* gimp_progress_update() will be called for. You have to call
* gimp_progress_init() beforehand then.
*
* Returns: The newly created layer.
*
* Since: 2.8
*/
gint32
gimp_layer_new_from_surface (gint32 image_ID,
const gchar *name,
cairo_surface_t *surface,
gdouble progress_start,
gdouble progress_end)
{
gint32 layer;
gint width;
gint height;
cairo_format_t format;
gdouble range = progress_end - progress_start;
g_return_val_if_fail (surface != NULL, -1);
g_return_val_if_fail (cairo_surface_get_type (surface) ==
CAIRO_SURFACE_TYPE_IMAGE, -1);
if (gimp_image_base_type (image_ID) != GIMP_RGB)
{
g_warning ("gimp_layer_new_from_surface() needs an RGB image");
return -1;
}
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
format = cairo_image_surface_get_format (surface);
if (format != CAIRO_FORMAT_ARGB32 &&
format != CAIRO_FORMAT_RGB24)
{
g_warning ("gimp_layer_new_from_surface() assumes that surface is RGB");
return -1;
}
layer = gimp_layer_new (image_ID, name, width, height,
format == CAIRO_FORMAT_RGB24 ?
GIMP_RGB_IMAGE : GIMP_RGBA_IMAGE,
100.0,
gimp_image_get_default_new_layer_mode (image_ID));
if (layer == -1)
return -1;
if (gimp_plugin_precision_enabled ())
{
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
src_buffer = gimp_cairo_surface_create_buffer (surface);
dest_buffer = gimp_drawable_get_buffer (layer);
gegl_buffer_copy (src_buffer, NULL, GEGL_ABYSS_NONE,
dest_buffer, NULL);
g_object_unref (src_buffer);
g_object_unref (dest_buffer);
}
else
{
GimpDrawable *drawable;
GimpPixelRgn rgn;
const guchar *pixels;
gpointer pr;
gsize rowstride;
guint count = 0;
guint done = 0;
drawable = gimp_drawable_get (layer);
gimp_pixel_rgn_init (&rgn, drawable, 0, 0, width, height, TRUE, FALSE);
rowstride = cairo_image_surface_get_stride (surface);
pixels = cairo_image_surface_get_data (surface);
for (pr = gimp_pixel_rgns_register (1, &rgn);
pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
const guchar *src = pixels + rgn.y * rowstride + rgn.x * 4;
guchar *dest = rgn.data;
gint y;
switch (format)
{
case CAIRO_FORMAT_RGB24:
for (y = 0; y < rgn.h; y++)
{
const guchar *s = src;
guchar *d = dest;
gint w = rgn.w;
while (w--)
{
GIMP_CAIRO_RGB24_GET_PIXEL (s, d[0], d[1], d[2]);
s += 4;
d += 3;
}
src += rowstride;
dest += rgn.rowstride;
}
break;
case CAIRO_FORMAT_ARGB32:
for (y = 0; y < rgn.h; y++)
{
const guchar *s = src;
guchar *d = dest;
gint w = rgn.w;
while (w--)
{
GIMP_CAIRO_ARGB32_GET_PIXEL (s, d[0], d[1], d[2], d[3]);
s += 4;
d += 4;
}
src += rowstride;
dest += rgn.rowstride;
}
break;
default:
break;
}
if (range > 0.0)
{
done += rgn.h * rgn.w;
if (count++ % 32 == 0)
gimp_progress_update (progress_start +
(gdouble) done / (width * height) * range);
}
}
gimp_drawable_detach (drawable);
}
if (range > 0.0)
gimp_progress_update (progress_end);
return layer;
}
/**
* gimp_layer_get_preserve_trans:
* @layer_ID: The layer.
*
* This procedure is deprecated! Use gimp_layer_get_lock_alpha() instead.
*
* Returns: The layer's preserve transperancy setting.
*/
gboolean
gimp_layer_get_preserve_trans (gint32 layer_ID)
{
return gimp_layer_get_lock_alpha (layer_ID);
}
/**
* gimp_layer_set_preserve_trans:
* @layer_ID: The layer.
* @preserve_trans: The new layer's preserve transperancy setting.
*
* This procedure is deprecated! Use gimp_layer_set_lock_alpha() instead.
*
* Returns: TRUE on success.
*/
gboolean
gimp_layer_set_preserve_trans (gint32 layer_ID,
gboolean preserve_trans)
{
return gimp_layer_set_lock_alpha (layer_ID, preserve_trans);
}
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