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PIKApp/app/core/pikadrawable.c

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Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 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 <cairo.h>
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libpikabase/pikabase.h"
#include "libpikacolor/pikacolor.h"
#include "libpikamath/pikamath.h"
#include "core-types.h"
#include "gegl/pika-babl.h"
#include "gegl/pika-gegl-apply-operation.h"
#include "gegl/pika-gegl-loops.h"
#include "gegl/pika-gegl-utils.h"
#include "pika-memsize.h"
#include "pika-utils.h"
#include "pikachannel.h"
#include "pikacontext.h"
#include "pikadrawable-combine.h"
#include "pikadrawable-fill.h"
#include "pikadrawable-floating-selection.h"
#include "pikadrawable-preview.h"
#include "pikadrawable-private.h"
#include "pikadrawable-shadow.h"
#include "pikadrawable-transform.h"
#include "pikafilterstack.h"
#include "pikaimage.h"
#include "pikaimage-colormap.h"
#include "pikaimage-undo-push.h"
#include "pikamarshal.h"
#include "pikapickable.h"
#include "pikaprogress.h"
#include "pika-log.h"
#include "pika-intl.h"
#define PAINT_UPDATE_CHUNK_WIDTH 32
#define PAINT_UPDATE_CHUNK_HEIGHT 32
enum
{
UPDATE,
FORMAT_CHANGED,
ALPHA_CHANGED,
BOUNDING_BOX_CHANGED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_BUFFER
};
/* local function prototypes */
static void pika_color_managed_iface_init (PikaColorManagedInterface *iface);
static void pika_pickable_iface_init (PikaPickableInterface *iface);
static void pika_drawable_dispose (GObject *object);
static void pika_drawable_finalize (GObject *object);
static void pika_drawable_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_drawable_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 pika_drawable_get_memsize (PikaObject *object,
gint64 *gui_size);
static gboolean pika_drawable_get_size (PikaViewable *viewable,
gint *width,
gint *height);
static void pika_drawable_preview_freeze (PikaViewable *viewable);
static void pika_drawable_preview_thaw (PikaViewable *viewable);
static GeglNode * pika_drawable_get_node (PikaFilter *filter);
static void pika_drawable_removed (PikaItem *item);
static PikaItem * pika_drawable_duplicate (PikaItem *item,
GType new_type);
static void pika_drawable_scale (PikaItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
PikaInterpolationType interp_type,
PikaProgress *progress);
static void pika_drawable_resize (PikaItem *item,
PikaContext *context,
PikaFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static void pika_drawable_flip (PikaItem *item,
PikaContext *context,
PikaOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void pika_drawable_rotate (PikaItem *item,
PikaContext *context,
PikaRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static void pika_drawable_transform (PikaItem *item,
PikaContext *context,
const PikaMatrix3 *matrix,
PikaTransformDirection direction,
PikaInterpolationType interpolation_type,
PikaTransformResize clip_result,
PikaProgress *progress);
static const guint8 *
pika_drawable_get_icc_profile (PikaColorManaged *managed,
gsize *len);
static PikaColorProfile *
pika_drawable_get_color_profile (PikaColorManaged *managed);
static void pika_drawable_profile_changed (PikaColorManaged *managed);
static gboolean pika_drawable_get_pixel_at (PikaPickable *pickable,
gint x,
gint y,
const Babl *format,
gpointer pixel);
static void pika_drawable_get_pixel_average (PikaPickable *pickable,
const GeglRectangle *rect,
const Babl *format,
gpointer pixel);
static void pika_drawable_real_update (PikaDrawable *drawable,
gint x,
gint y,
gint width,
gint height);
static gint64 pika_drawable_real_estimate_memsize (PikaDrawable *drawable,
PikaComponentType component_type,
gint width,
gint height);
static void pika_drawable_real_update_all (PikaDrawable *drawable);
static PikaComponentMask
pika_drawable_real_get_active_mask (PikaDrawable *drawable);
static gboolean pika_drawable_real_supports_alpha
(PikaDrawable *drawable);
static void pika_drawable_real_convert_type (PikaDrawable *drawable,
PikaImage *dest_image,
const Babl *new_format,
PikaColorProfile *src_profile,
PikaColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
PikaProgress *progress);
static GeglBuffer * pika_drawable_real_get_buffer (PikaDrawable *drawable);
static void pika_drawable_real_set_buffer (PikaDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer,
const GeglRectangle *bounds);
static GeglRectangle pika_drawable_real_get_bounding_box
(PikaDrawable *drawable);
static void pika_drawable_real_push_undo (PikaDrawable *drawable,
const gchar *undo_desc,
GeglBuffer *buffer,
gint x,
gint y,
gint width,
gint height);
static void pika_drawable_real_swap_pixels (PikaDrawable *drawable,
GeglBuffer *buffer,
gint x,
gint y);
static GeglNode * pika_drawable_real_get_source_node (PikaDrawable *drawable);
static void pika_drawable_format_changed (PikaDrawable *drawable);
static void pika_drawable_alpha_changed (PikaDrawable *drawable);
G_DEFINE_TYPE_WITH_CODE (PikaDrawable, pika_drawable, PIKA_TYPE_ITEM,
G_ADD_PRIVATE (PikaDrawable)
G_IMPLEMENT_INTERFACE (PIKA_TYPE_COLOR_MANAGED,
pika_color_managed_iface_init)
G_IMPLEMENT_INTERFACE (PIKA_TYPE_PICKABLE,
pika_pickable_iface_init))
#define parent_class pika_drawable_parent_class
static guint pika_drawable_signals[LAST_SIGNAL] = { 0 };
static void
pika_drawable_class_init (PikaDrawableClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaObjectClass *pika_object_class = PIKA_OBJECT_CLASS (klass);
PikaViewableClass *viewable_class = PIKA_VIEWABLE_CLASS (klass);
PikaFilterClass *filter_class = PIKA_FILTER_CLASS (klass);
PikaItemClass *item_class = PIKA_ITEM_CLASS (klass);
pika_drawable_signals[UPDATE] =
g_signal_new ("update",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaDrawableClass, update),
NULL, NULL,
pika_marshal_VOID__INT_INT_INT_INT,
G_TYPE_NONE, 4,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT);
pika_drawable_signals[FORMAT_CHANGED] =
g_signal_new ("format-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaDrawableClass, format_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_drawable_signals[ALPHA_CHANGED] =
g_signal_new ("alpha-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaDrawableClass, alpha_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
pika_drawable_signals[BOUNDING_BOX_CHANGED] =
g_signal_new ("bounding-box-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaDrawableClass, bounding_box_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
object_class->dispose = pika_drawable_dispose;
object_class->finalize = pika_drawable_finalize;
object_class->set_property = pika_drawable_set_property;
object_class->get_property = pika_drawable_get_property;
pika_object_class->get_memsize = pika_drawable_get_memsize;
viewable_class->get_size = pika_drawable_get_size;
viewable_class->get_new_preview = pika_drawable_get_new_preview;
viewable_class->get_new_pixbuf = pika_drawable_get_new_pixbuf;
viewable_class->preview_freeze = pika_drawable_preview_freeze;
viewable_class->preview_thaw = pika_drawable_preview_thaw;
filter_class->get_node = pika_drawable_get_node;
item_class->removed = pika_drawable_removed;
item_class->duplicate = pika_drawable_duplicate;
item_class->scale = pika_drawable_scale;
item_class->resize = pika_drawable_resize;
item_class->flip = pika_drawable_flip;
item_class->rotate = pika_drawable_rotate;
item_class->transform = pika_drawable_transform;
klass->update = pika_drawable_real_update;
klass->format_changed = NULL;
klass->alpha_changed = NULL;
klass->bounding_box_changed = NULL;
klass->estimate_memsize = pika_drawable_real_estimate_memsize;
klass->update_all = pika_drawable_real_update_all;
klass->invalidate_boundary = NULL;
klass->get_active_components = NULL;
klass->get_active_mask = pika_drawable_real_get_active_mask;
klass->supports_alpha = pika_drawable_real_supports_alpha;
klass->convert_type = pika_drawable_real_convert_type;
klass->apply_buffer = pika_drawable_real_apply_buffer;
klass->get_buffer = pika_drawable_real_get_buffer;
klass->set_buffer = pika_drawable_real_set_buffer;
klass->get_bounding_box = pika_drawable_real_get_bounding_box;
klass->push_undo = pika_drawable_real_push_undo;
klass->swap_pixels = pika_drawable_real_swap_pixels;
klass->get_source_node = pika_drawable_real_get_source_node;
g_object_class_override_property (object_class, PROP_BUFFER, "buffer");
}
static void
pika_drawable_init (PikaDrawable *drawable)
{
drawable->private = pika_drawable_get_instance_private (drawable);
drawable->private->filter_stack = pika_filter_stack_new (PIKA_TYPE_FILTER);
}
/* sorry for the evil casts */
static void
pika_color_managed_iface_init (PikaColorManagedInterface *iface)
{
iface->get_icc_profile = pika_drawable_get_icc_profile;
iface->get_color_profile = pika_drawable_get_color_profile;
iface->profile_changed = pika_drawable_profile_changed;
}
static void
pika_pickable_iface_init (PikaPickableInterface *iface)
{
iface->get_image = (PikaImage * (*) (PikaPickable *pickable)) pika_item_get_image;
iface->get_format = (const Babl * (*) (PikaPickable *pickable)) pika_drawable_get_format;
iface->get_format_with_alpha = (const Babl * (*) (PikaPickable *pickable)) pika_drawable_get_format_with_alpha;
iface->get_buffer = (GeglBuffer * (*) (PikaPickable *pickable)) pika_drawable_get_buffer;
iface->get_pixel_at = pika_drawable_get_pixel_at;
iface->get_pixel_average = pika_drawable_get_pixel_average;
}
static void
pika_drawable_dispose (GObject *object)
{
PikaDrawable *drawable = PIKA_DRAWABLE (object);
if (pika_drawable_get_floating_sel (drawable))
pika_drawable_detach_floating_sel (drawable);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
pika_drawable_finalize (GObject *object)
{
PikaDrawable *drawable = PIKA_DRAWABLE (object);
while (drawable->private->paint_count)
pika_drawable_end_paint (drawable);
g_clear_object (&drawable->private->buffer);
g_clear_object (&drawable->private->format_profile);
pika_drawable_free_shadow_buffer (drawable);
g_clear_object (&drawable->private->source_node);
g_clear_object (&drawable->private->buffer_source_node);
g_clear_object (&drawable->private->filter_stack);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_drawable_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
case PROP_BUFFER:
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_drawable_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaDrawable *drawable = PIKA_DRAWABLE (object);
switch (property_id)
{
case PROP_BUFFER:
g_value_set_object (value, drawable->private->buffer);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
pika_drawable_get_memsize (PikaObject *object,
gint64 *gui_size)
{
PikaDrawable *drawable = PIKA_DRAWABLE (object);
gint64 memsize = 0;
memsize += pika_gegl_buffer_get_memsize (pika_drawable_get_buffer (drawable));
memsize += pika_gegl_buffer_get_memsize (drawable->private->shadow);
return memsize + PIKA_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static gboolean
pika_drawable_get_size (PikaViewable *viewable,
gint *width,
gint *height)
{
PikaItem *item = PIKA_ITEM (viewable);
*width = pika_item_get_width (item);
*height = pika_item_get_height (item);
return TRUE;
}
static void
pika_drawable_preview_freeze (PikaViewable *viewable)
{
PikaViewable *parent = pika_viewable_get_parent (viewable);
if (! parent && pika_item_is_attached (PIKA_ITEM (viewable)))
parent = PIKA_VIEWABLE (pika_item_get_image (PIKA_ITEM (viewable)));
if (parent)
pika_viewable_preview_freeze (parent);
}
static void
pika_drawable_preview_thaw (PikaViewable *viewable)
{
PikaViewable *parent = pika_viewable_get_parent (viewable);
if (! parent && pika_item_is_attached (PIKA_ITEM (viewable)))
parent = PIKA_VIEWABLE (pika_item_get_image (PIKA_ITEM (viewable)));
if (parent)
pika_viewable_preview_thaw (parent);
}
static GeglNode *
pika_drawable_get_node (PikaFilter *filter)
{
PikaDrawable *drawable = PIKA_DRAWABLE (filter);
GeglNode *node;
GeglNode *input;
GeglNode *output;
node = PIKA_FILTER_CLASS (parent_class)->get_node (filter);
g_warn_if_fail (drawable->private->mode_node == NULL);
drawable->private->mode_node =
gegl_node_new_child (node,
"operation", "pika:normal",
NULL);
input = gegl_node_get_input_proxy (node, "input");
output = gegl_node_get_output_proxy (node, "output");
gegl_node_link (input, drawable->private->mode_node);
gegl_node_link (drawable->private->mode_node, output);
return node;
}
static void
pika_drawable_removed (PikaItem *item)
{
PikaDrawable *drawable = PIKA_DRAWABLE (item);
pika_drawable_free_shadow_buffer (drawable);
if (PIKA_ITEM_CLASS (parent_class)->removed)
PIKA_ITEM_CLASS (parent_class)->removed (item);
}
static PikaItem *
pika_drawable_duplicate (PikaItem *item,
GType new_type)
{
PikaItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, PIKA_TYPE_DRAWABLE), NULL);
new_item = PIKA_ITEM_CLASS (parent_class)->duplicate (item, new_type);
if (PIKA_IS_DRAWABLE (new_item))
{
PikaDrawable *drawable = PIKA_DRAWABLE (item);
PikaDrawable *new_drawable = PIKA_DRAWABLE (new_item);
GeglBuffer *new_buffer;
new_buffer = pika_gegl_buffer_dup (pika_drawable_get_buffer (drawable));
pika_drawable_set_buffer (new_drawable, FALSE, NULL, new_buffer);
g_object_unref (new_buffer);
}
return new_item;
}
static void
pika_drawable_scale (PikaItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
PikaInterpolationType interpolation_type,
PikaProgress *progress)
{
PikaDrawable *drawable = PIKA_DRAWABLE (item);
GeglBuffer *new_buffer;
new_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
new_width, new_height),
pika_drawable_get_format (drawable));
pika_gegl_apply_scale (pika_drawable_get_buffer (drawable),
progress, C_("undo-type", "Scale"),
new_buffer,
interpolation_type,
((gdouble) new_width /
pika_item_get_width (item)),
((gdouble) new_height /
pika_item_get_height (item)));
pika_drawable_set_buffer_full (drawable, pika_item_is_attached (item), NULL,
new_buffer,
GEGL_RECTANGLE (new_offset_x, new_offset_y,
0, 0),
TRUE);
g_object_unref (new_buffer);
}
static void
pika_drawable_resize (PikaItem *item,
PikaContext *context,
PikaFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
PikaDrawable *drawable = PIKA_DRAWABLE (item);
GeglBuffer *new_buffer;
gint new_offset_x;
gint new_offset_y;
gint copy_x, copy_y;
gint copy_width, copy_height;
gboolean intersect;
/* if the size doesn't change, this is a nop */
if (new_width == pika_item_get_width (item) &&
new_height == pika_item_get_height (item) &&
offset_x == 0 &&
offset_y == 0)
return;
new_offset_x = pika_item_get_offset_x (item) - offset_x;
new_offset_y = pika_item_get_offset_y (item) - offset_y;
intersect = pika_rectangle_intersect (pika_item_get_offset_x (item),
pika_item_get_offset_y (item),
pika_item_get_width (item),
pika_item_get_height (item),
new_offset_x,
new_offset_y,
new_width,
new_height,
&copy_x,
&copy_y,
&copy_width,
&copy_height);
new_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
new_width, new_height),
pika_drawable_get_format (drawable));
if (! intersect ||
copy_width != new_width ||
copy_height != new_height)
{
/* Clear the new buffer if needed */
PikaRGB color;
PikaPattern *pattern;
pika_get_fill_params (context, fill_type, &color, &pattern, NULL);
pika_drawable_fill_buffer (drawable, new_buffer,
&color, pattern, 0, 0);
}
if (intersect && copy_width && copy_height)
{
/* Copy the pixels in the intersection */
pika_gegl_buffer_copy (
pika_drawable_get_buffer (drawable),
GEGL_RECTANGLE (copy_x - pika_item_get_offset_x (item),
copy_y - pika_item_get_offset_y (item),
copy_width,
copy_height), GEGL_ABYSS_NONE,
new_buffer,
GEGL_RECTANGLE (copy_x - new_offset_x,
copy_y - new_offset_y, 0, 0));
}
pika_drawable_set_buffer_full (drawable, pika_item_is_attached (item), NULL,
new_buffer,
GEGL_RECTANGLE (new_offset_x, new_offset_y,
0, 0),
TRUE);
g_object_unref (new_buffer);
}
static void
pika_drawable_flip (PikaItem *item,
PikaContext *context,
PikaOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
PikaDrawable *drawable = PIKA_DRAWABLE (item);
GeglBuffer *buffer;
PikaColorProfile *buffer_profile;
gint off_x, off_y;
gint new_off_x, new_off_y;
pika_item_get_offset (item, &off_x, &off_y);
buffer = pika_drawable_transform_buffer_flip (drawable, context,
pika_drawable_get_buffer (drawable),
off_x, off_y,
flip_type, axis,
clip_result,
&buffer_profile,
&new_off_x, &new_off_y);
if (buffer)
{
pika_drawable_transform_paste (drawable, buffer, buffer_profile,
new_off_x, new_off_y, FALSE);
g_object_unref (buffer);
}
}
static void
pika_drawable_rotate (PikaItem *item,
PikaContext *context,
PikaRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
PikaDrawable *drawable = PIKA_DRAWABLE (item);
GeglBuffer *buffer;
PikaColorProfile *buffer_profile;
gint off_x, off_y;
gint new_off_x, new_off_y;
pika_item_get_offset (item, &off_x, &off_y);
buffer = pika_drawable_transform_buffer_rotate (drawable, context,
pika_drawable_get_buffer (drawable),
off_x, off_y,
rotate_type, center_x, center_y,
clip_result,
&buffer_profile,
&new_off_x, &new_off_y);
if (buffer)
{
pika_drawable_transform_paste (drawable, buffer, buffer_profile,
new_off_x, new_off_y, FALSE);
g_object_unref (buffer);
}
}
static void
pika_drawable_transform (PikaItem *item,
PikaContext *context,
const PikaMatrix3 *matrix,
PikaTransformDirection direction,
PikaInterpolationType interpolation_type,
PikaTransformResize clip_result,
PikaProgress *progress)
{
PikaDrawable *drawable = PIKA_DRAWABLE (item);
GeglBuffer *buffer;
PikaColorProfile *buffer_profile;
gint off_x, off_y;
gint new_off_x, new_off_y;
pika_item_get_offset (item, &off_x, &off_y);
buffer = pika_drawable_transform_buffer_affine (drawable, context,
pika_drawable_get_buffer (drawable),
off_x, off_y,
matrix, direction,
interpolation_type,
clip_result,
&buffer_profile,
&new_off_x, &new_off_y,
progress);
if (buffer)
{
pika_drawable_transform_paste (drawable, buffer, buffer_profile,
new_off_x, new_off_y, FALSE);
g_object_unref (buffer);
}
}
static const guint8 *
pika_drawable_get_icc_profile (PikaColorManaged *managed,
gsize *len)
{
PikaColorProfile *profile = pika_color_managed_get_color_profile (managed);
return pika_color_profile_get_icc_profile (profile, len);
}
static PikaColorProfile *
pika_drawable_get_color_profile (PikaColorManaged *managed)
{
PikaDrawable *drawable = PIKA_DRAWABLE (managed);
const Babl *format = pika_drawable_get_format (drawable);
if (! drawable->private->format_profile)
drawable->private->format_profile =
pika_babl_format_get_color_profile (format);
return drawable->private->format_profile;
}
static void
pika_drawable_profile_changed (PikaColorManaged *managed)
{
pika_viewable_invalidate_preview (PIKA_VIEWABLE (managed));
}
static gboolean
pika_drawable_get_pixel_at (PikaPickable *pickable,
gint x,
gint y,
const Babl *format,
gpointer pixel)
{
PikaDrawable *drawable = PIKA_DRAWABLE (pickable);
/* do not make this a g_return_if_fail() */
if (x < 0 || x >= pika_item_get_width (PIKA_ITEM (drawable)) ||
y < 0 || y >= pika_item_get_height (PIKA_ITEM (drawable)))
return FALSE;
gegl_buffer_sample (pika_drawable_get_buffer (drawable),
x, y, NULL, pixel, format,
GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
return TRUE;
}
static void
pika_drawable_get_pixel_average (PikaPickable *pickable,
const GeglRectangle *rect,
const Babl *format,
gpointer pixel)
{
PikaDrawable *drawable = PIKA_DRAWABLE (pickable);
return pika_gegl_average_color (pika_drawable_get_buffer (drawable),
rect, TRUE, GEGL_ABYSS_NONE, format, pixel);
}
static void
pika_drawable_real_update (PikaDrawable *drawable,
gint x,
gint y,
gint width,
gint height)
{
pika_viewable_invalidate_preview (PIKA_VIEWABLE (drawable));
}
static gint64
pika_drawable_real_estimate_memsize (PikaDrawable *drawable,
PikaComponentType component_type,
gint width,
gint height)
{
PikaImage *image = pika_item_get_image (PIKA_ITEM (drawable));
PikaTRCType trc = pika_drawable_get_trc (drawable);
const Babl *format;
format = pika_image_get_format (image,
pika_drawable_get_base_type (drawable),
pika_babl_precision (component_type, trc),
pika_drawable_has_alpha (drawable),
NULL);
return (gint64) babl_format_get_bytes_per_pixel (format) * width * height;
}
static void
pika_drawable_real_update_all (PikaDrawable *drawable)
{
pika_drawable_update (drawable, 0, 0, -1, -1);
}
static PikaComponentMask
pika_drawable_real_get_active_mask (PikaDrawable *drawable)
{
/* Return all, because that skips the component mask op when painting */
return PIKA_COMPONENT_MASK_ALL;
}
static gboolean
pika_drawable_real_supports_alpha (PikaDrawable *drawable)
{
return FALSE;
}
/* FIXME: this default impl is currently unused because no subclass
* chains up. the goal is to handle the almost identical subclass code
* here again.
*/
static void
pika_drawable_real_convert_type (PikaDrawable *drawable,
PikaImage *dest_image,
const Babl *new_format,
PikaColorProfile *src_profile,
PikaColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
PikaProgress *progress)
{
GeglBuffer *dest_buffer;
dest_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0,
pika_item_get_width (PIKA_ITEM (drawable)),
pika_item_get_height (PIKA_ITEM (drawable))),
new_format);
pika_gegl_buffer_copy (pika_drawable_get_buffer (drawable), NULL,
GEGL_ABYSS_NONE,
dest_buffer, NULL);
pika_drawable_set_buffer (drawable, push_undo, NULL, dest_buffer);
g_object_unref (dest_buffer);
}
static GeglBuffer *
pika_drawable_real_get_buffer (PikaDrawable *drawable)
{
return drawable->private->buffer;
}
static void
pika_drawable_real_set_buffer (PikaDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer,
const GeglRectangle *bounds)
{
PikaItem *item = PIKA_ITEM (drawable);
const Babl *old_format = NULL;
gint old_has_alpha = -1;
g_object_freeze_notify (G_OBJECT (drawable));
pika_drawable_invalidate_boundary (drawable);
if (push_undo)
pika_image_undo_push_drawable_mod (pika_item_get_image (item), undo_desc,
drawable, FALSE);
if (drawable->private->buffer)
{
old_format = pika_drawable_get_format (drawable);
old_has_alpha = pika_drawable_has_alpha (drawable);
}
g_set_object (&drawable->private->buffer, buffer);
g_clear_object (&drawable->private->format_profile);
if (drawable->private->buffer_source_node)
gegl_node_set (drawable->private->buffer_source_node,
"buffer", pika_drawable_get_buffer (drawable),
NULL);
pika_item_set_offset (item, bounds->x, bounds->y);
pika_item_set_size (item,
bounds->width ? bounds->width :
gegl_buffer_get_width (buffer),
bounds->height ? bounds->height :
gegl_buffer_get_height (buffer));
pika_drawable_update_bounding_box (drawable);
if (pika_drawable_get_format (drawable) != old_format)
pika_drawable_format_changed (drawable);
if (pika_drawable_has_alpha (drawable) != old_has_alpha)
pika_drawable_alpha_changed (drawable);
g_object_notify (G_OBJECT (drawable), "buffer");
g_object_thaw_notify (G_OBJECT (drawable));
}
static GeglRectangle
pika_drawable_real_get_bounding_box (PikaDrawable *drawable)
{
return gegl_node_get_bounding_box (pika_drawable_get_source_node (drawable));
}
static void
pika_drawable_real_push_undo (PikaDrawable *drawable,
const gchar *undo_desc,
GeglBuffer *buffer,
gint x,
gint y,
gint width,
gint height)
{
PikaImage *image;
if (! buffer)
{
GeglBuffer *drawable_buffer = pika_drawable_get_buffer (drawable);
GeglRectangle drawable_rect;
gegl_rectangle_align_to_buffer (
&drawable_rect,
GEGL_RECTANGLE (x, y, width, height),
drawable_buffer,
GEGL_RECTANGLE_ALIGNMENT_SUPERSET);
x = drawable_rect.x;
y = drawable_rect.y;
width = drawable_rect.width;
height = drawable_rect.height;
buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, width, height),
pika_drawable_get_format (drawable));
pika_gegl_buffer_copy (
drawable_buffer,
&drawable_rect, GEGL_ABYSS_NONE,
buffer,
GEGL_RECTANGLE (0, 0, 0, 0));
}
else
{
g_object_ref (buffer);
}
image = pika_item_get_image (PIKA_ITEM (drawable));
pika_image_undo_push_drawable (image,
undo_desc, drawable,
buffer, x, y);
g_object_unref (buffer);
}
static void
pika_drawable_real_swap_pixels (PikaDrawable *drawable,
GeglBuffer *buffer,
gint x,
gint y)
{
GeglBuffer *tmp;
gint width = gegl_buffer_get_width (buffer);
gint height = gegl_buffer_get_height (buffer);
tmp = pika_gegl_buffer_dup (buffer);
pika_gegl_buffer_copy (pika_drawable_get_buffer (drawable),
GEGL_RECTANGLE (x, y, width, height), GEGL_ABYSS_NONE,
buffer,
GEGL_RECTANGLE (0, 0, 0, 0));
pika_gegl_buffer_copy (tmp,
GEGL_RECTANGLE (0, 0, width, height), GEGL_ABYSS_NONE,
pika_drawable_get_buffer (drawable),
GEGL_RECTANGLE (x, y, 0, 0));
g_object_unref (tmp);
pika_drawable_update (drawable, x, y, width, height);
}
static GeglNode *
pika_drawable_real_get_source_node (PikaDrawable *drawable)
{
g_warn_if_fail (drawable->private->buffer_source_node == NULL);
drawable->private->buffer_source_node =
gegl_node_new_child (NULL,
"operation", "pika:buffer-source-validate",
"buffer", pika_drawable_get_buffer (drawable),
NULL);
return g_object_ref (drawable->private->buffer_source_node);
}
static void
pika_drawable_format_changed (PikaDrawable *drawable)
{
g_signal_emit (drawable, pika_drawable_signals[FORMAT_CHANGED], 0);
}
static void
pika_drawable_alpha_changed (PikaDrawable *drawable)
{
g_signal_emit (drawable, pika_drawable_signals[ALPHA_CHANGED], 0);
}
/* public functions */
PikaDrawable *
pika_drawable_new (GType type,
PikaImage *image,
const gchar *name,
gint offset_x,
gint offset_y,
gint width,
gint height,
const Babl *format)
{
PikaDrawable *drawable;
GeglBuffer *buffer;
g_return_val_if_fail (PIKA_IS_IMAGE (image), NULL);
g_return_val_if_fail (g_type_is_a (type, PIKA_TYPE_DRAWABLE), NULL);
g_return_val_if_fail (width > 0 && height > 0, NULL);
g_return_val_if_fail (format != NULL, NULL);
drawable = PIKA_DRAWABLE (pika_item_new (type,
image, name,
offset_x, offset_y,
width, height));
buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, width, height), format);
pika_drawable_set_buffer (drawable, FALSE, NULL, buffer);
g_object_unref (buffer);
return drawable;
}
gint64
pika_drawable_estimate_memsize (PikaDrawable *drawable,
PikaComponentType component_type,
gint width,
gint height)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), 0);
return PIKA_DRAWABLE_GET_CLASS (drawable)->estimate_memsize (drawable,
component_type,
width, height);
}
void
pika_drawable_update (PikaDrawable *drawable,
gint x,
gint y,
gint width,
gint height)
{
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
if (width < 0)
{
GeglRectangle bounding_box;
bounding_box = pika_drawable_get_bounding_box (drawable);
x = bounding_box.x;
width = bounding_box.width;
}
if (height < 0)
{
GeglRectangle bounding_box;
bounding_box = pika_drawable_get_bounding_box (drawable);
y = bounding_box.y;
height = bounding_box.height;
}
if (drawable->private->paint_count == 0)
{
g_signal_emit (drawable, pika_drawable_signals[UPDATE], 0,
x, y, width, height);
}
else
{
GeglRectangle rect;
if (gegl_rectangle_intersect (
&rect,
GEGL_RECTANGLE (x, y, width, height),
GEGL_RECTANGLE (0, 0,
pika_item_get_width (PIKA_ITEM (drawable)),
pika_item_get_height (PIKA_ITEM (drawable)))))
{
GeglRectangle aligned_rect;
gegl_rectangle_align_to_buffer (&aligned_rect, &rect,
pika_drawable_get_buffer (drawable),
GEGL_RECTANGLE_ALIGNMENT_SUPERSET);
if (drawable->private->paint_copy_region)
{
cairo_region_union_rectangle (
drawable->private->paint_copy_region,
(const cairo_rectangle_int_t *) &aligned_rect);
}
else
{
drawable->private->paint_copy_region =
cairo_region_create_rectangle (
(const cairo_rectangle_int_t *) &aligned_rect);
}
gegl_rectangle_align (&aligned_rect, &rect,
GEGL_RECTANGLE (0, 0,
PAINT_UPDATE_CHUNK_WIDTH,
PAINT_UPDATE_CHUNK_HEIGHT),
GEGL_RECTANGLE_ALIGNMENT_SUPERSET);
if (drawable->private->paint_update_region)
{
cairo_region_union_rectangle (
drawable->private->paint_update_region,
(const cairo_rectangle_int_t *) &aligned_rect);
}
else
{
drawable->private->paint_update_region =
cairo_region_create_rectangle (
(const cairo_rectangle_int_t *) &aligned_rect);
}
}
}
}
void
pika_drawable_update_all (PikaDrawable *drawable)
{
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
PIKA_DRAWABLE_GET_CLASS (drawable)->update_all (drawable);
}
void
pika_drawable_invalidate_boundary (PikaDrawable *drawable)
{
PikaDrawableClass *drawable_class;
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
drawable_class = PIKA_DRAWABLE_GET_CLASS (drawable);
if (drawable_class->invalidate_boundary)
drawable_class->invalidate_boundary (drawable);
}
void
pika_drawable_get_active_components (PikaDrawable *drawable,
gboolean *active)
{
PikaDrawableClass *drawable_class;
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
g_return_if_fail (active != NULL);
drawable_class = PIKA_DRAWABLE_GET_CLASS (drawable);
if (drawable_class->get_active_components)
drawable_class->get_active_components (drawable, active);
}
PikaComponentMask
pika_drawable_get_active_mask (PikaDrawable *drawable)
{
PikaComponentMask mask;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), 0);
mask = PIKA_DRAWABLE_GET_CLASS (drawable)->get_active_mask (drawable);
/* if the drawable doesn't have an alpha channel, the value of the mask's
* alpha-bit doesn't matter, however, we'd like to have a fully-clear or
* fully-set mask whenever possible, since it allows us to skip component
* masking altogether. we therefore set or clear the alpha bit, depending on
* the state of the other bits, so that it never gets in the way of a uniform
* mask.
*/
if (! pika_drawable_has_alpha (drawable))
{
if (mask & ~PIKA_COMPONENT_MASK_ALPHA)
mask |= PIKA_COMPONENT_MASK_ALPHA;
else
mask &= ~PIKA_COMPONENT_MASK_ALPHA;
}
return mask;
}
gboolean
pika_drawable_supports_alpha (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
return PIKA_DRAWABLE_GET_CLASS (drawable)->supports_alpha (drawable);
}
void
pika_drawable_convert_type (PikaDrawable *drawable,
PikaImage *dest_image,
PikaImageBaseType new_base_type,
PikaPrecision new_precision,
gboolean new_has_alpha,
PikaColorProfile *src_profile,
PikaColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
PikaProgress *progress)
{
const Babl *old_format;
const Babl *new_format;
gint old_bits;
gint new_bits;
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
g_return_if_fail (PIKA_IS_IMAGE (dest_image));
g_return_if_fail (new_base_type != pika_drawable_get_base_type (drawable) ||
new_precision != pika_drawable_get_precision (drawable) ||
new_has_alpha != pika_drawable_has_alpha (drawable) ||
dest_profile);
g_return_if_fail (src_profile == NULL || PIKA_IS_COLOR_PROFILE (src_profile));
g_return_if_fail (dest_profile == NULL || PIKA_IS_COLOR_PROFILE (dest_profile));
g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
if (! pika_item_is_attached (PIKA_ITEM (drawable)))
push_undo = FALSE;
old_format = pika_drawable_get_format (drawable);
new_format = pika_image_get_format (dest_image,
new_base_type,
new_precision,
new_has_alpha,
NULL /* handled by layer */);
old_bits = (babl_format_get_bytes_per_pixel (old_format) * 8 /
babl_format_get_n_components (old_format));
new_bits = (babl_format_get_bytes_per_pixel (new_format) * 8 /
babl_format_get_n_components (new_format));
if (old_bits <= new_bits || new_bits > 16)
{
/* don't dither if we are converting to a higher bit depth,
* or to more than 16 bits (gegl:dither only does
* 16 bits).
*/
layer_dither_type = GEGL_DITHER_NONE;
mask_dither_type = GEGL_DITHER_NONE;
}
PIKA_DRAWABLE_GET_CLASS (drawable)->convert_type (drawable, dest_image,
new_format,
src_profile,
dest_profile,
layer_dither_type,
mask_dither_type,
push_undo,
progress);
if (progress)
pika_progress_set_value (progress, 1.0);
}
void
pika_drawable_apply_buffer (PikaDrawable *drawable,
GeglBuffer *buffer,
const GeglRectangle *buffer_region,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
PikaLayerMode mode,
PikaLayerColorSpace blend_space,
PikaLayerColorSpace composite_space,
PikaLayerCompositeMode composite_mode,
GeglBuffer *base_buffer,
gint base_x,
gint base_y)
{
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
g_return_if_fail (pika_item_is_attached (PIKA_ITEM (drawable)));
g_return_if_fail (GEGL_IS_BUFFER (buffer));
g_return_if_fail (buffer_region != NULL);
g_return_if_fail (base_buffer == NULL || GEGL_IS_BUFFER (base_buffer));
PIKA_DRAWABLE_GET_CLASS (drawable)->apply_buffer (drawable, buffer,
buffer_region,
push_undo, undo_desc,
opacity, mode,
blend_space,
composite_space,
composite_mode,
base_buffer,
base_x, base_y);
}
GeglBuffer *
pika_drawable_get_buffer (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
if (drawable->private->paint_count == 0)
return PIKA_DRAWABLE_GET_CLASS (drawable)->get_buffer (drawable);
else
return drawable->private->paint_buffer;
}
void
pika_drawable_set_buffer (PikaDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer)
{
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
g_return_if_fail (GEGL_IS_BUFFER (buffer));
if (! pika_item_is_attached (PIKA_ITEM (drawable)))
push_undo = FALSE;
pika_drawable_set_buffer_full (drawable, push_undo, undo_desc, buffer, NULL,
TRUE);
}
void
pika_drawable_set_buffer_full (PikaDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
GeglBuffer *buffer,
const GeglRectangle *bounds,
gboolean update)
{
PikaItem *item;
GeglRectangle curr_bounds;
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
g_return_if_fail (GEGL_IS_BUFFER (buffer));
item = PIKA_ITEM (drawable);
if (! pika_item_is_attached (PIKA_ITEM (drawable)))
push_undo = FALSE;
if (! bounds)
{
pika_item_get_offset (PIKA_ITEM (drawable),
&curr_bounds.x, &curr_bounds.y);
curr_bounds.width = 0;
curr_bounds.height = 0;
bounds = &curr_bounds;
}
if (update && pika_drawable_get_buffer (drawable))
{
GeglBuffer *old_buffer = pika_drawable_get_buffer (drawable);
GeglRectangle old_extent;
GeglRectangle new_extent;
old_extent = *gegl_buffer_get_extent (old_buffer);
old_extent.x += pika_item_get_offset_x (item);
old_extent.y += pika_item_get_offset_x (item);
new_extent = *gegl_buffer_get_extent (buffer);
new_extent.x += bounds->x;
new_extent.y += bounds->y;
if (! gegl_rectangle_equal (&old_extent, &new_extent))
pika_drawable_update (drawable, 0, 0, -1, -1);
}
g_object_freeze_notify (G_OBJECT (drawable));
PIKA_DRAWABLE_GET_CLASS (drawable)->set_buffer (drawable,
push_undo, undo_desc,
buffer, bounds);
g_object_thaw_notify (G_OBJECT (drawable));
if (update)
pika_drawable_update (drawable, 0, 0, -1, -1);
}
void
pika_drawable_steal_buffer (PikaDrawable *drawable,
PikaDrawable *src_drawable)
{
GeglBuffer *buffer;
GeglBuffer *replacement_buffer;
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
g_return_if_fail (PIKA_IS_DRAWABLE (src_drawable));
buffer = pika_drawable_get_buffer (src_drawable);
g_return_if_fail (buffer != NULL);
g_object_ref (buffer);
replacement_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, 1, 1),
gegl_buffer_get_format (buffer));
pika_drawable_set_buffer (src_drawable, FALSE, NULL, replacement_buffer);
pika_drawable_set_buffer (drawable, FALSE, NULL, buffer);
g_object_unref (replacement_buffer);
g_object_unref (buffer);
}
void
pika_drawable_set_format (PikaDrawable *drawable,
const Babl *format,
gboolean copy_buffer,
gboolean push_undo)
{
PikaItem *item;
GeglBuffer *buffer;
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
g_return_if_fail (format != NULL);
g_return_if_fail (format != pika_drawable_get_format (drawable));
g_return_if_fail (pika_babl_format_get_base_type (format) ==
pika_drawable_get_base_type (drawable));
g_return_if_fail (pika_babl_format_get_component_type (format) ==
pika_drawable_get_component_type (drawable));
g_return_if_fail (babl_format_has_alpha (format) ==
pika_drawable_has_alpha (drawable));
g_return_if_fail (push_undo == FALSE || copy_buffer == TRUE);
item = PIKA_ITEM (drawable);
if (! pika_item_is_attached (item))
push_undo = FALSE;
if (push_undo)
pika_image_undo_push_drawable_format (pika_item_get_image (item),
NULL, drawable);
buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
pika_item_get_width (item),
pika_item_get_height (item)),
format);
if (copy_buffer)
{
gegl_buffer_set_format (buffer, pika_drawable_get_format (drawable));
pika_gegl_buffer_copy (pika_drawable_get_buffer (drawable),
NULL, GEGL_ABYSS_NONE,
buffer, NULL);
gegl_buffer_set_format (buffer, NULL);
}
pika_drawable_set_buffer (drawable, FALSE, NULL, buffer);
g_object_unref (buffer);
}
GeglNode *
pika_drawable_get_source_node (PikaDrawable *drawable)
{
GeglNode *input;
GeglNode *source;
GeglNode *filter;
GeglNode *output;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
if (drawable->private->source_node)
return drawable->private->source_node;
drawable->private->source_node = gegl_node_new ();
input = gegl_node_get_input_proxy (drawable->private->source_node, "input");
source = PIKA_DRAWABLE_GET_CLASS (drawable)->get_source_node (drawable);
gegl_node_add_child (drawable->private->source_node, source);
g_object_unref (source);
if (gegl_node_has_pad (source, "input"))
{
gegl_node_link (input, source);
}
filter = pika_filter_stack_get_graph (PIKA_FILTER_STACK (drawable->private->filter_stack));
gegl_node_add_child (drawable->private->source_node, filter);
gegl_node_link (source, filter);
output = gegl_node_get_output_proxy (drawable->private->source_node, "output");
gegl_node_link (filter, output);
if (pika_drawable_get_floating_sel (drawable))
_pika_drawable_add_floating_sel_filter (drawable);
return drawable->private->source_node;
}
GeglNode *
pika_drawable_get_mode_node (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
if (! drawable->private->mode_node)
pika_filter_get_node (PIKA_FILTER (drawable));
return drawable->private->mode_node;
}
GeglRectangle
pika_drawable_get_bounding_box (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable),
*GEGL_RECTANGLE (0, 0, 0, 0));
if (gegl_rectangle_is_empty (&drawable->private->bounding_box))
pika_drawable_update_bounding_box (drawable);
return drawable->private->bounding_box;
}
gboolean
pika_drawable_update_bounding_box (PikaDrawable *drawable)
{
GeglRectangle bounding_box;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
bounding_box =
PIKA_DRAWABLE_GET_CLASS (drawable)->get_bounding_box (drawable);
if (! gegl_rectangle_equal (&bounding_box, &drawable->private->bounding_box))
{
GeglRectangle old_bounding_box = drawable->private->bounding_box;
GeglRectangle diff_rects[4];
gint n_diff_rects;
gint i;
n_diff_rects = gegl_rectangle_subtract (diff_rects,
&old_bounding_box,
&bounding_box);
for (i = 0; i < n_diff_rects; i++)
{
pika_drawable_update (drawable,
diff_rects[i].x,
diff_rects[i].y,
diff_rects[i].width,
diff_rects[i].height);
}
drawable->private->bounding_box = bounding_box;
g_signal_emit (drawable, pika_drawable_signals[BOUNDING_BOX_CHANGED], 0);
n_diff_rects = gegl_rectangle_subtract (diff_rects,
&bounding_box,
&old_bounding_box);
for (i = 0; i < n_diff_rects; i++)
{
pika_drawable_update (drawable,
diff_rects[i].x,
diff_rects[i].y,
diff_rects[i].width,
diff_rects[i].height);
}
return TRUE;
}
return FALSE;
}
void
pika_drawable_swap_pixels (PikaDrawable *drawable,
GeglBuffer *buffer,
gint x,
gint y)
{
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
g_return_if_fail (GEGL_IS_BUFFER (buffer));
PIKA_DRAWABLE_GET_CLASS (drawable)->swap_pixels (drawable, buffer, x, y);
}
void
pika_drawable_push_undo (PikaDrawable *drawable,
const gchar *undo_desc,
GeglBuffer *buffer,
gint x,
gint y,
gint width,
gint height)
{
PikaItem *item;
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
g_return_if_fail (buffer == NULL || GEGL_IS_BUFFER (buffer));
item = PIKA_ITEM (drawable);
g_return_if_fail (pika_item_is_attached (item));
if (! buffer &&
! pika_rectangle_intersect (x, y,
width, height,
0, 0,
pika_item_get_width (item),
pika_item_get_height (item),
&x, &y, &width, &height))
{
g_warning ("%s: tried to push empty region", G_STRFUNC);
return;
}
PIKA_DRAWABLE_GET_CLASS (drawable)->push_undo (drawable, undo_desc,
buffer,
x, y, width, height);
}
const Babl *
pika_drawable_get_space (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
return babl_format_get_space (pika_drawable_get_format (drawable));
}
const Babl *
pika_drawable_get_format (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
return gegl_buffer_get_format (drawable->private->buffer);
}
const Babl *
pika_drawable_get_format_with_alpha (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
return pika_image_get_format (pika_item_get_image (PIKA_ITEM (drawable)),
pika_drawable_get_base_type (drawable),
pika_drawable_get_precision (drawable),
TRUE,
pika_drawable_get_space (drawable));
}
const Babl *
pika_drawable_get_format_without_alpha (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
return pika_image_get_format (pika_item_get_image (PIKA_ITEM (drawable)),
pika_drawable_get_base_type (drawable),
pika_drawable_get_precision (drawable),
FALSE,
pika_drawable_get_space (drawable));
}
PikaTRCType
pika_drawable_get_trc (PikaDrawable *drawable)
{
const Babl *format;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
format = gegl_buffer_get_format (drawable->private->buffer);
return pika_babl_format_get_trc (format);
}
gboolean
pika_drawable_has_alpha (PikaDrawable *drawable)
{
const Babl *format;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
format = gegl_buffer_get_format (drawable->private->buffer);
return babl_format_has_alpha (format);
}
PikaImageBaseType
pika_drawable_get_base_type (PikaDrawable *drawable)
{
const Babl *format;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), -1);
format = gegl_buffer_get_format (drawable->private->buffer);
return pika_babl_format_get_base_type (format);
}
PikaComponentType
pika_drawable_get_component_type (PikaDrawable *drawable)
{
const Babl *format;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), -1);
format = gegl_buffer_get_format (drawable->private->buffer);
return pika_babl_format_get_component_type (format);
}
PikaPrecision
pika_drawable_get_precision (PikaDrawable *drawable)
{
const Babl *format;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), -1);
format = gegl_buffer_get_format (drawable->private->buffer);
return pika_babl_format_get_precision (format);
}
gboolean
pika_drawable_is_rgb (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
return (pika_drawable_get_base_type (drawable) == PIKA_RGB);
}
gboolean
pika_drawable_is_gray (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
return (pika_drawable_get_base_type (drawable) == PIKA_GRAY);
}
gboolean
pika_drawable_is_indexed (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
return (pika_drawable_get_base_type (drawable) == PIKA_INDEXED);
}
const Babl *
pika_drawable_get_component_format (PikaDrawable *drawable,
PikaChannelType channel)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
switch (channel)
{
case PIKA_CHANNEL_RED:
return pika_babl_component_format (PIKA_RGB,
pika_drawable_get_precision (drawable),
RED);
case PIKA_CHANNEL_GREEN:
return pika_babl_component_format (PIKA_RGB,
pika_drawable_get_precision (drawable),
GREEN);
case PIKA_CHANNEL_BLUE:
return pika_babl_component_format (PIKA_RGB,
pika_drawable_get_precision (drawable),
BLUE);
case PIKA_CHANNEL_ALPHA:
return pika_babl_component_format (PIKA_RGB,
pika_drawable_get_precision (drawable),
ALPHA);
case PIKA_CHANNEL_GRAY:
return pika_babl_component_format (PIKA_GRAY,
pika_drawable_get_precision (drawable),
GRAY);
case PIKA_CHANNEL_INDEXED:
return babl_format ("Y u8"); /* will extract grayscale, the best
* we can do here */
}
return NULL;
}
gint
pika_drawable_get_component_index (PikaDrawable *drawable,
PikaChannelType channel)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), -1);
switch (channel)
{
case PIKA_CHANNEL_RED: return RED;
case PIKA_CHANNEL_GREEN: return GREEN;
case PIKA_CHANNEL_BLUE: return BLUE;
case PIKA_CHANNEL_GRAY: return GRAY;
case PIKA_CHANNEL_INDEXED: return INDEXED;
case PIKA_CHANNEL_ALPHA:
switch (pika_drawable_get_base_type (drawable))
{
case PIKA_RGB: return ALPHA;
case PIKA_GRAY: return ALPHA_G;
case PIKA_INDEXED: return ALPHA_I;
}
}
return -1;
}
guchar *
pika_drawable_get_colormap (PikaDrawable *drawable)
{
PikaImage *image;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
image = pika_item_get_image (PIKA_ITEM (drawable));
return image ? pika_image_get_colormap (image) : NULL;
}
void
pika_drawable_start_paint (PikaDrawable *drawable)
{
g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
if (drawable->private->paint_count == 0)
{
GeglBuffer *buffer = pika_drawable_get_buffer (drawable);
g_return_if_fail (buffer != NULL);
g_return_if_fail (drawable->private->paint_buffer == NULL);
g_return_if_fail (drawable->private->paint_copy_region == NULL);
g_return_if_fail (drawable->private->paint_update_region == NULL);
drawable->private->paint_buffer = pika_gegl_buffer_dup (buffer);
}
drawable->private->paint_count++;
}
gboolean
pika_drawable_end_paint (PikaDrawable *drawable)
{
gboolean result = FALSE;
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (drawable->private->paint_count > 0, FALSE);
if (drawable->private->paint_count == 1)
{
result = pika_drawable_flush_paint (drawable);
g_clear_object (&drawable->private->paint_buffer);
}
drawable->private->paint_count--;
return result;
}
gboolean
pika_drawable_flush_paint (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (drawable->private->paint_count > 0, FALSE);
if (drawable->private->paint_copy_region)
{
GeglBuffer *buffer;
gint n_rects;
gint i;
buffer = PIKA_DRAWABLE_GET_CLASS (drawable)->get_buffer (drawable);
g_return_val_if_fail (buffer != NULL, FALSE);
g_return_val_if_fail (drawable->private->paint_buffer != NULL, FALSE);
n_rects = cairo_region_num_rectangles (
drawable->private->paint_copy_region);
for (i = 0; i < n_rects; i++)
{
GeglRectangle rect;
cairo_region_get_rectangle (drawable->private->paint_copy_region,
i, (cairo_rectangle_int_t *) &rect);
pika_gegl_buffer_copy (
drawable->private->paint_buffer, &rect, GEGL_ABYSS_NONE,
buffer, NULL);
}
g_clear_pointer (&drawable->private->paint_copy_region,
cairo_region_destroy);
n_rects = cairo_region_num_rectangles (
drawable->private->paint_update_region);
for (i = 0; i < n_rects; i++)
{
GeglRectangle rect;
cairo_region_get_rectangle (drawable->private->paint_update_region,
i, (cairo_rectangle_int_t *) &rect);
g_signal_emit (drawable, pika_drawable_signals[UPDATE], 0,
rect.x, rect.y, rect.width, rect.height);
}
g_clear_pointer (&drawable->private->paint_update_region,
cairo_region_destroy);
return TRUE;
}
return FALSE;
}
gboolean
pika_drawable_is_painting (PikaDrawable *drawable)
{
g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), FALSE);
return drawable->private->paint_count > 0;
}