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gimp/app/text/gimptextlayer.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* GimpTextLayer
* Copyright (C) 2002-2004 Sven Neumann <sven@gimp.org>
*
* 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 <cairo.h>
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <pango/pangocairo.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "text-types.h"
#include "gegl/gimp-babl.h"
#include "gegl/gimp-gegl-loops.h"
#include "gegl/gimp-gegl-utils.h"
#include "core/gimp.h"
#include "core/gimp-utils.h"
#include "core/gimpcontainer.h"
#include "core/gimpcontext.h"
#include "core/gimpdatafactory.h"
#include "core/gimpimage.h"
#include "core/gimpimage-color-profile.h"
#include "core/gimpimage-undo.h"
#include "core/gimpimage-undo-push.h"
#include "core/gimpitemtree.h"
#include "core/gimpparasitelist.h"
#include "core/gimppattern.h"
#include "core/gimptempbuf.h"
#include "gimptext.h"
#include "gimptextlayer.h"
#include "gimptextlayout.h"
#include "gimptextlayout-render.h"
#include "gimp-intl.h"
enum
{
PROP_0,
PROP_TEXT,
PROP_AUTO_RENAME,
PROP_MODIFIED
};
struct _GimpTextLayerPrivate
{
GimpTextDirection base_dir;
};
static void gimp_text_layer_finalize (GObject *object);
static void gimp_text_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_text_layer_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static gint64 gimp_text_layer_get_memsize (GimpObject *object,
gint64 *gui_size);
static GimpItem * gimp_text_layer_duplicate (GimpItem *item,
GType new_type);
static gboolean gimp_text_layer_rename (GimpItem *item,
const gchar *new_name,
const gchar *undo_desc,
GError **error);
static void gimp_text_layer_set_buffer (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer,
const GeglRectangle *bounds);
static void gimp_text_layer_push_undo (GimpDrawable *drawable,
const gchar *undo_desc,
GeglBuffer *buffer,
gint x,
gint y,
gint width,
gint height);
static void gimp_text_layer_convert_type (GimpLayer *layer,
GimpImage *dest_image,
const Babl *new_format,
GimpColorProfile *src_profile,
GimpColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
GimpProgress *progress);
static void gimp_text_layer_text_changed (GimpTextLayer *layer);
static gboolean gimp_text_layer_render (GimpTextLayer *layer);
static void gimp_text_layer_render_layout (GimpTextLayer *layer,
GimpTextLayout *layout);
G_DEFINE_TYPE_WITH_PRIVATE (GimpTextLayer, gimp_text_layer, GIMP_TYPE_LAYER)
#define parent_class gimp_text_layer_parent_class
static void
gimp_text_layer_class_init (GimpTextLayerClass *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);
GimpLayerClass *layer_class = GIMP_LAYER_CLASS (klass);
object_class->finalize = gimp_text_layer_finalize;
object_class->get_property = gimp_text_layer_get_property;
object_class->set_property = gimp_text_layer_set_property;
gimp_object_class->get_memsize = gimp_text_layer_get_memsize;
viewable_class->default_icon_name = "gimp-text-layer";
item_class->duplicate = gimp_text_layer_duplicate;
item_class->rename = gimp_text_layer_rename;
#if 0
item_class->scale = gimp_text_layer_scale;
item_class->flip = gimp_text_layer_flip;
item_class->rotate = gimp_text_layer_rotate;
item_class->transform = gimp_text_layer_transform;
#endif
item_class->default_name = _("Text Layer");
item_class->rename_desc = _("Rename Text Layer");
item_class->translate_desc = _("Move Text Layer");
item_class->scale_desc = _("Scale Text Layer");
item_class->resize_desc = _("Resize Text Layer");
item_class->flip_desc = _("Flip Text Layer");
item_class->rotate_desc = _("Rotate Text Layer");
item_class->transform_desc = _("Transform Text Layer");
drawable_class->set_buffer = gimp_text_layer_set_buffer;
drawable_class->push_undo = gimp_text_layer_push_undo;
layer_class->convert_type = gimp_text_layer_convert_type;
GIMP_CONFIG_PROP_OBJECT (object_class, PROP_TEXT,
"text",
NULL, NULL,
GIMP_TYPE_TEXT,
GIMP_PARAM_STATIC_STRINGS);
GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_AUTO_RENAME,
"auto-rename",
NULL, NULL,
TRUE,
GIMP_PARAM_STATIC_STRINGS);
GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_MODIFIED,
"modified",
NULL, NULL,
FALSE,
GIMP_PARAM_STATIC_STRINGS);
}
static void
gimp_text_layer_init (GimpTextLayer *layer)
{
layer->text = NULL;
layer->text_parasite = NULL;
layer->text_parasite_is_old = FALSE;
layer->private = gimp_text_layer_get_instance_private (layer);
}
static void
gimp_text_layer_finalize (GObject *object)
{
GimpTextLayer *layer = GIMP_TEXT_LAYER (object);
g_clear_object (&layer->text);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_text_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpTextLayer *text_layer = GIMP_TEXT_LAYER (object);
switch (property_id)
{
case PROP_TEXT:
g_value_set_object (value, text_layer->text);
break;
case PROP_AUTO_RENAME:
g_value_set_boolean (value, text_layer->auto_rename);
break;
case PROP_MODIFIED:
g_value_set_boolean (value, text_layer->modified);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_text_layer_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpTextLayer *text_layer = GIMP_TEXT_LAYER (object);
switch (property_id)
{
case PROP_TEXT:
gimp_text_layer_set_text (text_layer, g_value_get_object (value));
break;
case PROP_AUTO_RENAME:
text_layer->auto_rename = g_value_get_boolean (value);
break;
case PROP_MODIFIED:
text_layer->modified = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
gimp_text_layer_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpTextLayer *text_layer = GIMP_TEXT_LAYER (object);
gint64 memsize = 0;
memsize += gimp_object_get_memsize (GIMP_OBJECT (text_layer->text),
gui_size);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static GimpItem *
gimp_text_layer_duplicate (GimpItem *item,
GType new_type)
{
GimpItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_DRAWABLE), NULL);
new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type);
if (GIMP_IS_TEXT_LAYER (new_item))
{
GimpTextLayer *layer = GIMP_TEXT_LAYER (item);
GimpTextLayer *new_layer = GIMP_TEXT_LAYER (new_item);
gimp_config_sync (G_OBJECT (layer), G_OBJECT (new_layer), 0);
if (layer->text)
{
GimpText *text = gimp_config_duplicate (GIMP_CONFIG (layer->text));
gimp_text_layer_set_text (new_layer, text);
g_object_unref (text);
}
/* this is just the parasite name, not a pointer to the parasite */
if (layer->text_parasite)
{
new_layer->text_parasite = layer->text_parasite;
new_layer->text_parasite_is_old = layer->text_parasite_is_old;
}
new_layer->private->base_dir = layer->private->base_dir;
}
return new_item;
}
static gboolean
gimp_text_layer_rename (GimpItem *item,
const gchar *new_name,
const gchar *undo_desc,
GError **error)
{
if (GIMP_ITEM_CLASS (parent_class)->rename (item, new_name, undo_desc, error))
{
g_object_set (item, "auto-rename", FALSE, NULL);
return TRUE;
}
return FALSE;
}
static void
gimp_text_layer_set_buffer (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer,
const GeglRectangle *bounds)
{
GimpTextLayer *layer = GIMP_TEXT_LAYER (drawable);
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
if (push_undo && ! layer->modified)
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_DRAWABLE_MOD,
undo_desc);
GIMP_DRAWABLE_CLASS (parent_class)->set_buffer (drawable,
push_undo, undo_desc,
buffer, bounds);
if (push_undo && ! layer->modified)
{
gimp_image_undo_push_text_layer_modified (image, NULL, layer);
g_object_set (drawable, "modified", TRUE, NULL);
gimp_image_undo_group_end (image);
}
}
static void
gimp_text_layer_push_undo (GimpDrawable *drawable,
const gchar *undo_desc,
GeglBuffer *buffer,
gint x,
gint y,
gint width,
gint height)
{
GimpTextLayer *layer = GIMP_TEXT_LAYER (drawable);
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
if (! layer->modified)
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_DRAWABLE, undo_desc);
GIMP_DRAWABLE_CLASS (parent_class)->push_undo (drawable, undo_desc,
buffer,
x, y, width, height);
if (! layer->modified)
{
gimp_image_undo_push_text_layer_modified (image, NULL, layer);
g_object_set (drawable, "modified", TRUE, NULL);
gimp_image_undo_group_end (image);
}
}
static void
gimp_text_layer_convert_type (GimpLayer *layer,
GimpImage *dest_image,
const Babl *new_format,
GimpColorProfile *src_profile,
GimpColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
GimpProgress *progress)
{
GimpTextLayer *text_layer = GIMP_TEXT_LAYER (layer);
GimpImage *image = gimp_item_get_image (GIMP_ITEM (text_layer));
if (! text_layer->text ||
text_layer->modified ||
layer_dither_type != GEGL_DITHER_NONE)
{
GIMP_LAYER_CLASS (parent_class)->convert_type (layer, dest_image,
new_format,
src_profile,
dest_profile,
layer_dither_type,
mask_dither_type,
push_undo,
progress);
}
else
{
if (push_undo)
gimp_image_undo_push_text_layer_convert (image, NULL, text_layer);
text_layer->convert_format = new_format;
gimp_text_layer_render (text_layer);
text_layer->convert_format = NULL;
}
}
/* public functions */
/**
* gimp_text_layer_new:
* @image: the #GimpImage the layer should belong to
* @text: a #GimpText object
*
* Creates a new text layer.
*
* Returns: (nullable): a new #GimpTextLayer or %NULL in case of a problem
**/
GimpLayer *
gimp_text_layer_new (GimpImage *image,
GimpText *text)
{
GimpTextLayer *layer;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
g_return_val_if_fail (GIMP_IS_TEXT (text), NULL);
if (! text->text && ! text->markup)
return NULL;
layer =
GIMP_TEXT_LAYER (gimp_drawable_new (GIMP_TYPE_TEXT_LAYER,
image, NULL,
0, 0, 1, 1,
gimp_image_get_layer_format (image,
TRUE)));
gimp_layer_set_mode (GIMP_LAYER (layer),
gimp_image_get_default_new_layer_mode (image),
FALSE);
gimp_text_layer_set_text (layer, text);
if (! gimp_text_layer_render (layer))
{
g_object_unref (layer);
return NULL;
}
return GIMP_LAYER (layer);
}
void
gimp_text_layer_set_text (GimpTextLayer *layer,
GimpText *text)
{
g_return_if_fail (GIMP_IS_TEXT_LAYER (layer));
g_return_if_fail (text == NULL || GIMP_IS_TEXT (text));
if (layer->text == text)
return;
if (layer->text)
{
g_signal_handlers_disconnect_by_func (layer->text,
G_CALLBACK (gimp_text_layer_text_changed),
layer);
g_clear_object (&layer->text);
}
if (text)
{
layer->text = g_object_ref (text);
layer->private->base_dir = layer->text->base_dir;
g_signal_connect_object (text, "changed",
G_CALLBACK (gimp_text_layer_text_changed),
layer, G_CONNECT_SWAPPED);
}
g_object_notify (G_OBJECT (layer), "text");
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (layer));
}
GimpText *
gimp_text_layer_get_text (GimpTextLayer *layer)
{
g_return_val_if_fail (GIMP_IS_TEXT_LAYER (layer), NULL);
return layer->text;
}
void
gimp_text_layer_set (GimpTextLayer *layer,
const gchar *undo_desc,
const gchar *first_property_name,
...)
{
GimpImage *image;
GimpText *text;
va_list var_args;
g_return_if_fail (gimp_item_is_text_layer (GIMP_ITEM (layer)));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (layer)));
text = gimp_text_layer_get_text (layer);
if (! text)
return;
image = gimp_item_get_image (GIMP_ITEM (layer));
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_TEXT, undo_desc);
g_object_freeze_notify (G_OBJECT (layer));
if (layer->modified)
{
gimp_image_undo_push_text_layer_modified (image, NULL, layer);
/* pass copy_tiles = TRUE so we not only ref the tiles; after
* being a text layer again, undo doesn't care about the
* layer's pixels any longer because they are generated, so
* changing the text would happily overwrite the layer's
* pixels, changing the pixels on the undo stack too without
* any chance to ever undo again.
*/
gimp_image_undo_push_drawable_mod (image, NULL,
GIMP_DRAWABLE (layer), TRUE);
}
gimp_image_undo_push_text_layer (image, undo_desc, layer, NULL);
va_start (var_args, first_property_name);
g_object_set_valist (G_OBJECT (text), first_property_name, var_args);
va_end (var_args);
g_object_set (layer, "modified", FALSE, NULL);
g_object_thaw_notify (G_OBJECT (layer));
gimp_image_undo_group_end (image);
}
/**
* gimp_text_layer_discard:
* @layer: a #GimpTextLayer
*
* Discards the text information. This makes @layer behave like a
* normal layer.
*/
void
gimp_text_layer_discard (GimpTextLayer *layer)
{
g_return_if_fail (GIMP_IS_TEXT_LAYER (layer));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (layer)));
if (! layer->text)
return;
gimp_image_undo_push_text_layer (gimp_item_get_image (GIMP_ITEM (layer)),
_("Discard Text Information"),
layer, NULL);
gimp_text_layer_set_text (layer, NULL);
}
gboolean
gimp_item_is_text_layer (GimpItem *item)
{
return (GIMP_IS_TEXT_LAYER (item) &&
GIMP_TEXT_LAYER (item)->text &&
GIMP_TEXT_LAYER (item)->modified == FALSE);
}
/* private functions */
static const Babl *
gimp_text_layer_get_format (GimpTextLayer *layer)
{
if (layer->convert_format)
return layer->convert_format;
return gimp_drawable_get_format (GIMP_DRAWABLE (layer));
}
static void
gimp_text_layer_text_changed (GimpTextLayer *layer)
{
/* If the text layer was created from a parasite, it's time to
* remove that parasite now.
*/
if (layer->text_parasite)
{
/* Don't push an undo because the parasite only exists temporarily
* while the text layer is loaded from XCF.
*/
gimp_item_parasite_detach (GIMP_ITEM (layer), layer->text_parasite,
FALSE);
layer->text_parasite = NULL;
layer->text_parasite_is_old = FALSE;
}
if (layer->text->box_mode == GIMP_TEXT_BOX_DYNAMIC)
{
gint old_width;
gint new_width;
GimpItem *item = GIMP_ITEM (layer);
GimpTextDirection old_base_dir = layer->private->base_dir;
GimpTextDirection new_base_dir = layer->text->base_dir;
old_width = gimp_item_get_width (item);
gimp_text_layer_render (layer);
new_width = gimp_item_get_width (item);
if (old_base_dir != new_base_dir)
{
switch (old_base_dir)
{
case GIMP_TEXT_DIRECTION_LTR:
case GIMP_TEXT_DIRECTION_RTL:
case GIMP_TEXT_DIRECTION_TTB_LTR:
case GIMP_TEXT_DIRECTION_TTB_LTR_UPRIGHT:
switch (new_base_dir)
{
case GIMP_TEXT_DIRECTION_TTB_RTL:
case GIMP_TEXT_DIRECTION_TTB_RTL_UPRIGHT:
gimp_item_translate (item, -new_width, 0, FALSE);
break;
case GIMP_TEXT_DIRECTION_LTR:
case GIMP_TEXT_DIRECTION_RTL:
case GIMP_TEXT_DIRECTION_TTB_LTR:
case GIMP_TEXT_DIRECTION_TTB_LTR_UPRIGHT:
break;
}
break;
case GIMP_TEXT_DIRECTION_TTB_RTL:
case GIMP_TEXT_DIRECTION_TTB_RTL_UPRIGHT:
switch (new_base_dir)
{
case GIMP_TEXT_DIRECTION_LTR:
case GIMP_TEXT_DIRECTION_RTL:
case GIMP_TEXT_DIRECTION_TTB_LTR:
case GIMP_TEXT_DIRECTION_TTB_LTR_UPRIGHT:
gimp_item_translate (item, old_width, 0, FALSE);
break;
case GIMP_TEXT_DIRECTION_TTB_RTL:
case GIMP_TEXT_DIRECTION_TTB_RTL_UPRIGHT:
break;
}
break;
}
}
else if ((new_base_dir == GIMP_TEXT_DIRECTION_TTB_RTL ||
new_base_dir == GIMP_TEXT_DIRECTION_TTB_RTL_UPRIGHT))
{
if (old_width != new_width)
gimp_item_translate (item, old_width - new_width, 0, FALSE);
}
}
else
gimp_text_layer_render (layer);
layer->private->base_dir = layer->text->base_dir;
}
static gboolean
gimp_text_layer_render (GimpTextLayer *layer)
{
GimpDrawable *drawable;
GimpItem *item;
GimpImage *image;
GimpContainer *container;
GimpTextLayout *layout;
gdouble xres;
gdouble yres;
gint width;
gint height;
GError *error = NULL;
if (! layer->text)
return FALSE;
drawable = GIMP_DRAWABLE (layer);
item = GIMP_ITEM (layer);
image = gimp_item_get_image (item);
container = gimp_data_factory_get_container (image->gimp->font_factory);
gimp_data_factory_data_wait (image->gimp->font_factory);
if (gimp_container_is_empty (container))
{
gimp_message_literal (image->gimp, NULL, GIMP_MESSAGE_ERROR,
_("Due to lack of any fonts, "
"text functionality is not available."));
return FALSE;
}
gimp_image_get_resolution (image, &xres, &yres);
layout = gimp_text_layout_new (layer->text, image, xres, yres, &error);
if (error)
{
gimp_message_literal (image->gimp, NULL, GIMP_MESSAGE_ERROR, error->message);
g_error_free (error);
}
g_object_freeze_notify (G_OBJECT (drawable));
if (gimp_text_layout_get_size (layout, &width, &height) &&
(width != gimp_item_get_width (item) ||
height != gimp_item_get_height (item) ||
gimp_text_layer_get_format (layer) !=
gimp_drawable_get_format (drawable)))
{
GeglBuffer *new_buffer;
new_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, width, height),
gimp_text_layer_get_format (layer));
gimp_drawable_set_buffer (drawable, FALSE, NULL, new_buffer);
g_object_unref (new_buffer);
if (gimp_layer_get_mask (GIMP_LAYER (layer)))
{
GimpLayerMask *mask = gimp_layer_get_mask (GIMP_LAYER (layer));
static GimpContext *unused_eek = NULL;
if (! unused_eek)
unused_eek = gimp_context_new (image->gimp, "eek", NULL);
gimp_item_resize (GIMP_ITEM (mask),
unused_eek, GIMP_FILL_TRANSPARENT,
width, height, 0, 0);
}
}
if (layer->auto_rename)
{
GimpItem *item = GIMP_ITEM (layer);
gchar *name = NULL;
if (layer->text->text)
{
name = gimp_utf8_strtrim (layer->text->text, 30);
}
else if (layer->text->markup)
{
gchar *tmp = gimp_markup_extract_text (layer->text->markup);
name = gimp_utf8_strtrim (tmp, 30);
g_free (tmp);
}
if (! name || ! name[0])
{
g_free (name);
name = g_strdup (_("Empty Text Layer"));
}
if (gimp_item_is_attached (item))
{
gimp_item_tree_rename_item (gimp_item_get_tree (item), item,
name, FALSE, NULL);
g_free (name);
}
else
{
gimp_object_take_name (GIMP_OBJECT (layer), name);
}
}
if (width > 0 && height > 0)
gimp_text_layer_render_layout (layer, layout);
g_object_unref (layout);
g_object_thaw_notify (G_OBJECT (drawable));
return (width > 0 && height > 0);
}
static void
gimp_text_layer_set_dash_info (cairo_t *cr,
gdouble width,
gdouble dash_offset,
const GArray *dash_info)
{
if (dash_info && dash_info->len >= 2)
{
gint n_dashes = dash_info->len;
gdouble *dashes = g_new (gdouble, dash_info->len);
gint i;
dash_offset = dash_offset * MAX (width, 1.0);
for (i = 0; i < n_dashes; i++)
dashes[i] = MAX (width, 1.0) * g_array_index (dash_info, gdouble, i);
/* correct 0.0 in the first element (starts with a gap) */
if (dashes[0] == 0.0)
{
gdouble first;
first = dashes[1];
/* shift the pattern to really starts with a dash and
* use the offset to skip into it.
*/
for (i = 0; i < n_dashes - 2; i++)
{
dashes[i] = dashes[i + 2];
dash_offset += dashes[i];
}
if (n_dashes % 2 == 1)
{
dashes[n_dashes - 2] = first;
n_dashes--;
}
else if (dash_info->len > 2)
{
dashes[n_dashes - 3] += first;
n_dashes -= 2;
}
}
/* correct odd number of dash specifiers */
if (n_dashes % 2 == 1)
{
gdouble last = dashes[n_dashes - 1];
dashes[0] += last;
dash_offset += last;
n_dashes--;
}
if (n_dashes >= 2)
cairo_set_dash (cr,
dashes,
n_dashes,
dash_offset);
g_free (dashes);
}
}
static cairo_surface_t *
gimp_temp_buf_create_cairo_surface (GimpTempBuf *temp_buf)
{
cairo_surface_t *surface;
gboolean has_alpha;
const Babl *format;
const Babl *fish = NULL;
const guchar *data;
gint width;
gint height;
gint bpp;
guchar *pixels;
gint rowstride;
gint i;
g_return_val_if_fail (temp_buf != NULL, NULL);
data = gimp_temp_buf_get_data (temp_buf);
format = gimp_temp_buf_get_format (temp_buf);
width = gimp_temp_buf_get_width (temp_buf);
height = gimp_temp_buf_get_height (temp_buf);
bpp = babl_format_get_bytes_per_pixel (format);
has_alpha = babl_format_has_alpha (format);
surface = cairo_image_surface_create (has_alpha ?
CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
width, height);
pixels = cairo_image_surface_get_data (surface);
rowstride = cairo_image_surface_get_stride (surface);
if (format != babl_format (has_alpha ? "cairo-ARGB32" : "cairo-RGB24"))
fish = babl_fish (format, babl_format (has_alpha ? "cairo-ARGB32" : "cairo-RGB24"));
for (i = 0; i < height; i++)
{
if (fish)
babl_process (fish, data, pixels, width);
else
memcpy (pixels, data, width * bpp);
data += width * bpp;
pixels += rowstride;
}
return surface;
}
static void
gimp_text_layer_render_layout (GimpTextLayer *layer,
GimpTextLayout *layout)
{
GimpDrawable *drawable = GIMP_DRAWABLE (layer);
GimpItem *item = GIMP_ITEM (layer);
const Babl *format;
GeglBuffer *buffer;
cairo_t *cr;
cairo_surface_t *surface;
gint width;
gint height;
cairo_status_t status;
g_return_if_fail (gimp_drawable_has_alpha (drawable));
width = gimp_item_get_width (item);
height = gimp_item_get_height (item);
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 17, 2)
surface = cairo_image_surface_create (CAIRO_FORMAT_RGBA128F, width, height);
#else
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
#endif
status = cairo_surface_status (surface);
if (status != CAIRO_STATUS_SUCCESS)
{
GimpImage *image = gimp_item_get_image (item);
gimp_message_literal (image->gimp, NULL, GIMP_MESSAGE_ERROR,
_("Your text cannot be rendered. It is likely too big. "
"Please make it shorter or use a smaller font."));
cairo_surface_destroy (surface);
return;
}
cr = cairo_create (surface);
if (layer->text->outline != GIMP_TEXT_OUTLINE_STROKE_ONLY)
{
cairo_save (cr);
gimp_text_layout_render (layout, cr, layer->text->base_dir, FALSE);
cairo_restore (cr);
}
if (layer->text->outline != GIMP_TEXT_OUTLINE_NONE)
{
GimpText *text = layer->text;
cairo_save (cr);
cairo_set_antialias (cr, text->outline_antialias ?
CAIRO_ANTIALIAS_GRAY : CAIRO_ANTIALIAS_NONE);
cairo_set_line_cap (cr,
text->outline_cap_style == GIMP_CAP_BUTT ? CAIRO_LINE_CAP_BUTT :
text->outline_cap_style == GIMP_CAP_ROUND ? CAIRO_LINE_CAP_ROUND :
CAIRO_LINE_CAP_SQUARE);
cairo_set_line_join (cr, text->outline_join_style == GIMP_JOIN_MITER ? CAIRO_LINE_JOIN_MITER :
text->outline_join_style == GIMP_JOIN_ROUND ? CAIRO_LINE_JOIN_ROUND :
CAIRO_LINE_JOIN_BEVEL);
cairo_set_miter_limit (cr, text->outline_miter_limit);
if (text->outline_dash_info)
gimp_text_layer_set_dash_info (cr, text->outline_width, text->outline_dash_offset, text->outline_dash_info);
if (text->outline_style == GIMP_CUSTOM_STYLE_PATTERN && text->outline_pattern)
{
GimpTempBuf *tempbuf = gimp_pattern_get_mask (text->outline_pattern);
cairo_surface_t *surface = gimp_temp_buf_create_cairo_surface (tempbuf);
cairo_set_source_surface (cr, surface, 0.0, 0.0);
cairo_surface_destroy (surface);
cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
}
else
{
GeglColor *col = text->outline_foreground;
gdouble color[3];
format = gimp_text_layout_get_format (layout, "double");
gegl_color_get_pixel (col, format, color);
/* Text layout can be either grayscale or RGB without alpha. */
if (! babl_space_is_gray (babl_format_get_space (format)))
cairo_set_source_rgba (cr, color[0], color[1], color[2], 1.0);
else
cairo_set_source_rgba (cr, color[0], color[0], color[0], 1.0);
}
cairo_set_line_width (cr, text->outline_width * 2);
gimp_text_layout_render (layout, cr, text->base_dir, TRUE);
cairo_clip_preserve (cr);
cairo_stroke (cr);
cairo_restore (cr);
}
cairo_destroy (cr);
cairo_surface_flush (surface);
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 17, 2)
/* The CAIRO_FORMAT_RGBA128F surface maps to the layout TRC and space. */
switch (gimp_text_layout_get_trc (layout))
{
case GIMP_TRC_LINEAR:
format = babl_format_with_space ("RaGaBaA float", gimp_text_layout_get_space (layout));
break;
case GIMP_TRC_NON_LINEAR:
format = babl_format_with_space ("R'aG'aB'aA float", gimp_text_layout_get_space (layout));
break;
case GIMP_TRC_PERCEPTUAL:
format = babl_format_with_space ("R~aG~aB~aA float", gimp_text_layout_get_space (layout));
break;
default:
g_return_if_reached ();
}
#else
format = babl_format_with_space ("cairo-ARGB32", gimp_text_layout_get_space (layout));
#endif
buffer = gimp_cairo_surface_create_buffer (surface, format);
gimp_gegl_buffer_copy (buffer, NULL, GEGL_ABYSS_NONE,
gimp_drawable_get_buffer (drawable), NULL);
g_object_unref (buffer);
cairo_surface_destroy (surface);
gimp_drawable_update (drawable, 0, 0, width, height);
}
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