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gimp/app/core/gimpprojection.c

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/* GIMP - The GNU Image Manipulation Program
* 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 <stdlib.h>
#include <string.h>
#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "gegl/gimp-babl.h"
#include "gegl/gimp-gegl-loops.h"
#include "gegl/gimp-gegl-utils.h"
#include "gimp.h"
#include "gimp-memsize.h"
#include "gimpchunkiterator.h"
#include "gimpimage.h"
#include "gimpmarshal.h"
#include "gimppickable.h"
#include "gimpprojectable.h"
#include "gimpprojection.h"
#include "gimptilehandlerprojectable.h"
#include "gimp-log.h"
#include "gimp-priorities.h"
/* chunk size for area updates */
#define GIMP_PROJECTION_UPDATE_CHUNK_WIDTH 32
#define GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT 32
enum
{
UPDATE,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_BUFFER
};
struct _GimpProjectionPrivate
{
GimpProjectable *projectable;
GeglBuffer *buffer;
GimpTileHandlerValidate *validate_handler;
gint priority;
cairo_region_t *update_region;
GeglRectangle priority_rect;
GimpChunkIterator *iter;
guint idle_id;
gboolean invalidate_preview;
};
/* local function prototypes */
static void gimp_projection_pickable_iface_init (GimpPickableInterface *iface);
static void gimp_projection_finalize (GObject *object);
static void gimp_projection_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_projection_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 gimp_projection_get_memsize (GimpObject *object,
gint64 *gui_size);
static void gimp_projection_pickable_flush (GimpPickable *pickable);
static GimpImage * gimp_projection_get_image (GimpPickable *pickable);
static const Babl * gimp_projection_get_format (GimpPickable *pickable);
static GeglBuffer * gimp_projection_get_buffer (GimpPickable *pickable);
static gboolean gimp_projection_get_pixel_at (GimpPickable *pickable,
gint x,
gint y,
const Babl *format,
gpointer pixel);
static gdouble gimp_projection_get_opacity_at (GimpPickable *pickable,
gint x,
gint y);
static void gimp_projection_get_pixel_average (GimpPickable *pickable,
const GeglRectangle *rect,
const Babl *format,
gpointer pixel);
static void gimp_projection_allocate_buffer (GimpProjection *proj);
static void gimp_projection_free_buffer (GimpProjection *proj);
static void gimp_projection_add_update_area (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h);
static void gimp_projection_flush_whenever (GimpProjection *proj,
gboolean now,
gboolean direct);
static void gimp_projection_update_priority_rect (GimpProjection *proj);
static void gimp_projection_chunk_render_start (GimpProjection *proj);
static void gimp_projection_chunk_render_stop (GimpProjection *proj,
gboolean merge);
static gboolean gimp_projection_chunk_render_callback (GimpProjection *proj);
static gboolean gimp_projection_chunk_render_iteration(GimpProjection *proj);
static void gimp_projection_paint_area (GimpProjection *proj,
gboolean now,
gint x,
gint y,
gint w,
gint h);
static void gimp_projection_projectable_invalidate(GimpProjectable *projectable,
gint x,
gint y,
gint w,
gint h,
GimpProjection *proj);
static void gimp_projection_projectable_flush (GimpProjectable *projectable,
gboolean invalidate_preview,
GimpProjection *proj);
static void
gimp_projection_projectable_structure_changed (GimpProjectable *projectable,
GimpProjection *proj);
static void gimp_projection_projectable_bounds_changed (GimpProjectable *projectable,
gint old_x,
gint old_y,
GimpProjection *proj);
G_DEFINE_TYPE_WITH_CODE (GimpProjection, gimp_projection, GIMP_TYPE_OBJECT,
G_ADD_PRIVATE (GimpProjection)
G_IMPLEMENT_INTERFACE (GIMP_TYPE_PICKABLE,
gimp_projection_pickable_iface_init))
#define parent_class gimp_projection_parent_class
static guint projection_signals[LAST_SIGNAL] = { 0 };
static void
gimp_projection_class_init (GimpProjectionClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
projection_signals[UPDATE] =
g_signal_new ("update",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpProjectionClass, update),
NULL, NULL,
gimp_marshal_VOID__BOOLEAN_INT_INT_INT_INT,
G_TYPE_NONE, 5,
G_TYPE_BOOLEAN,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT);
object_class->finalize = gimp_projection_finalize;
object_class->set_property = gimp_projection_set_property;
object_class->get_property = gimp_projection_get_property;
gimp_object_class->get_memsize = gimp_projection_get_memsize;
g_object_class_override_property (object_class, PROP_BUFFER, "buffer");
}
static void
gimp_projection_init (GimpProjection *proj)
{
proj->priv = gimp_projection_get_instance_private (proj);
}
static void
gimp_projection_pickable_iface_init (GimpPickableInterface *iface)
{
iface->flush = gimp_projection_pickable_flush;
iface->get_image = gimp_projection_get_image;
iface->get_format = gimp_projection_get_format;
iface->get_format_with_alpha = gimp_projection_get_format; /* sic */
iface->get_buffer = gimp_projection_get_buffer;
iface->get_pixel_at = gimp_projection_get_pixel_at;
iface->get_opacity_at = gimp_projection_get_opacity_at;
iface->get_pixel_average = gimp_projection_get_pixel_average;
}
static void
gimp_projection_finalize (GObject *object)
{
GimpProjection *proj = GIMP_PROJECTION (object);
gimp_projection_free_buffer (proj);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_projection_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
gimp_projection_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpProjection *projection = GIMP_PROJECTION (object);
switch (property_id)
{
case PROP_BUFFER:
g_value_set_object (value, projection->priv->buffer);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
gimp_projection_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpProjection *projection = GIMP_PROJECTION (object);
gint64 memsize = 0;
memsize += gimp_gegl_pyramid_get_memsize (projection->priv->buffer);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
/**
* gimp_projection_estimate_memsize:
* @type: the projectable's base type
* @component_type: the projectable's component type
* @width: projection width
* @height: projection height
*
* Calculates a rough estimate of the memory that is required for the
* projection of an image with the given @width and @height.
*
* Returns: a rough estimate of the memory requirements.
**/
gint64
gimp_projection_estimate_memsize (GimpImageBaseType type,
GimpComponentType component_type,
gint width,
gint height)
{
const Babl *format;
gint64 bytes;
if (type == GIMP_INDEXED)
type = GIMP_RGB;
format = gimp_babl_format (type,
gimp_babl_precision (component_type, FALSE),
TRUE, NULL);
bytes = babl_format_get_bytes_per_pixel (format);
/* The pyramid levels constitute a geometric sum with a ratio of 1/4. */
return bytes * (gint64) width * (gint64) height * 1.33;
}
static void
gimp_projection_pickable_flush (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
/* create the buffer if it doesn't exist */
gimp_projection_get_buffer (pickable);
gimp_projection_finish_draw (proj);
gimp_projection_flush_now (proj, FALSE);
if (proj->priv->invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->priv->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->priv->projectable);
}
}
static GimpImage *
gimp_projection_get_image (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
return gimp_projectable_get_image (proj->priv->projectable);
}
static const Babl *
gimp_projection_get_format (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
return gimp_projectable_get_format (proj->priv->projectable);
}
static GeglBuffer *
gimp_projection_get_buffer (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
if (! proj->priv->buffer)
{
GeglRectangle bounding_box;
bounding_box =
gimp_projectable_get_bounding_box (proj->priv->projectable);
gimp_projection_allocate_buffer (proj);
/* This used to call gimp_tile_handler_validate_invalidate()
* which forced the entire projection to be constructed in one
* go for new images, causing a potentially huge delay. Now we
* initially validate stuff the normal way, which makes the
* image appear incrementally, but it keeps everything
* responsive.
*/
gimp_projection_add_update_area (proj,
bounding_box.x, bounding_box.y,
bounding_box.width, bounding_box.height);
proj->priv->invalidate_preview = TRUE;
gimp_projection_flush (proj);
}
return proj->priv->buffer;
}
static gboolean
gimp_projection_get_pixel_at (GimpPickable *pickable,
gint x,
gint y,
const Babl *format,
gpointer pixel)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
GeglBuffer *buffer = gimp_projection_get_buffer (pickable);
GeglRectangle bounding_box;
bounding_box = gimp_projectable_get_bounding_box (proj->priv->projectable);
if (x < bounding_box.x ||
y < bounding_box.y ||
x >= bounding_box.x + bounding_box.width ||
y >= bounding_box.y + bounding_box.height)
{
return FALSE;
}
gegl_buffer_sample (buffer, x, y, NULL, pixel, format,
GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
return TRUE;
}
static gdouble
gimp_projection_get_opacity_at (GimpPickable *pickable,
gint x,
gint y)
{
return GIMP_OPACITY_OPAQUE;
}
static void
gimp_projection_get_pixel_average (GimpPickable *pickable,
const GeglRectangle *rect,
const Babl *format,
gpointer pixel)
{
GeglBuffer *buffer = gimp_projection_get_buffer (pickable);
return gimp_gegl_average_color (buffer, rect, TRUE, GEGL_ABYSS_NONE, format,
pixel);
}
/* public functions */
GimpProjection *
gimp_projection_new (GimpProjectable *projectable)
{
GimpProjection *proj;
g_return_val_if_fail (GIMP_IS_PROJECTABLE (projectable), NULL);
proj = g_object_new (GIMP_TYPE_PROJECTION, NULL);
proj->priv->projectable = projectable;
g_signal_connect_object (projectable, "invalidate",
G_CALLBACK (gimp_projection_projectable_invalidate),
proj, 0);
g_signal_connect_object (projectable, "flush",
G_CALLBACK (gimp_projection_projectable_flush),
proj, 0);
g_signal_connect_object (projectable, "structure-changed",
G_CALLBACK (gimp_projection_projectable_structure_changed),
proj, 0);
g_signal_connect_object (projectable, "bounds-changed",
G_CALLBACK (gimp_projection_projectable_bounds_changed),
proj, 0);
return proj;
}
void
gimp_projection_set_priority (GimpProjection *proj,
gint priority)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
proj->priv->priority = priority;
}
gint
gimp_projection_get_priority (GimpProjection *proj)
{
g_return_val_if_fail (GIMP_IS_PROJECTION (proj), 0);
return proj->priv->priority;
}
void
gimp_projection_set_priority_rect (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
proj->priv->priority_rect = *GEGL_RECTANGLE (x, y, w, h);
gimp_projection_update_priority_rect (proj);
}
void
gimp_projection_stop_rendering (GimpProjection *proj)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
gimp_projection_chunk_render_stop (proj, TRUE);
}
void
gimp_projection_flush (GimpProjection *proj)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
/* Construct in chunks */
gimp_projection_flush_whenever (proj, FALSE, FALSE);
}
void
gimp_projection_flush_now (GimpProjection *proj,
gboolean direct)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
/* Construct NOW */
gimp_projection_flush_whenever (proj, TRUE, direct);
}
void
gimp_projection_finish_draw (GimpProjection *proj)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
if (proj->priv->iter)
{
gimp_chunk_iterator_set_priority_rect (proj->priv->iter, NULL);
gimp_tile_handler_validate_begin_validate (proj->priv->validate_handler);
while (gimp_projection_chunk_render_iteration (proj));
gimp_tile_handler_validate_end_validate (proj->priv->validate_handler);
gimp_projection_chunk_render_stop (proj, FALSE);
}
}
/* private functions */
static void
gimp_projection_allocate_buffer (GimpProjection *proj)
{
const Babl *format;
GeglRectangle bounding_box;
if (proj->priv->buffer)
return;
format = gimp_projection_get_format (GIMP_PICKABLE (proj));
bounding_box =
gimp_projectable_get_bounding_box (proj->priv->projectable);
proj->priv->buffer = gegl_buffer_new (&bounding_box, format);
proj->priv->validate_handler =
GIMP_TILE_HANDLER_VALIDATE (
gimp_tile_handler_projectable_new (proj->priv->projectable));
gimp_tile_handler_validate_assign (proj->priv->validate_handler,
proj->priv->buffer);
g_object_notify (G_OBJECT (proj), "buffer");
}
static void
gimp_projection_free_buffer (GimpProjection *proj)
{
gimp_projection_chunk_render_stop (proj, FALSE);
g_clear_pointer (&proj->priv->update_region, cairo_region_destroy);
if (proj->priv->buffer)
{
gimp_tile_handler_validate_unassign (proj->priv->validate_handler,
proj->priv->buffer);
g_clear_object (&proj->priv->buffer);
g_clear_object (&proj->priv->validate_handler);
g_object_notify (G_OBJECT (proj), "buffer");
}
}
static void
gimp_projection_add_update_area (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
cairo_rectangle_int_t rect;
GeglRectangle bounding_box;
bounding_box = gimp_projectable_get_bounding_box (proj->priv->projectable);
/* align the rectangle to the UPDATE_CHUNK_WIDTH x UPDATE_CHUNK_HEIGHT grid,
* to decrease the complexity of the update area.
*/
w = ceil ((gdouble) (x + w) / GIMP_PROJECTION_UPDATE_CHUNK_WIDTH ) * GIMP_PROJECTION_UPDATE_CHUNK_WIDTH;
h = ceil ((gdouble) (y + h) / GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT) * GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT;
x = floor ((gdouble) x / GIMP_PROJECTION_UPDATE_CHUNK_WIDTH ) * GIMP_PROJECTION_UPDATE_CHUNK_WIDTH;
y = floor ((gdouble) y / GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT) * GIMP_PROJECTION_UPDATE_CHUNK_HEIGHT;
w -= x;
h -= y;
if (gegl_rectangle_intersect ((GeglRectangle *) &rect,
GEGL_RECTANGLE (x, y, w, h), &bounding_box))
{
if (proj->priv->update_region)
cairo_region_union_rectangle (proj->priv->update_region, &rect);
else
proj->priv->update_region = cairo_region_create_rectangle (&rect);
}
}
static void
gimp_projection_flush_whenever (GimpProjection *proj,
gboolean now,
gboolean direct)
{
if (proj->priv->update_region)
{
/* Make sure we have a buffer */
gimp_projection_allocate_buffer (proj);
if (now) /* Synchronous */
{
gint n_rects = cairo_region_num_rectangles (proj->priv->update_region);
gint i;
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (proj->priv->update_region,
i, &rect);
gimp_projection_paint_area (proj,
direct,
rect.x,
rect.y,
rect.width,
rect.height);
}
/* Free the update region */
g_clear_pointer (&proj->priv->update_region, cairo_region_destroy);
}
else /* Asynchronous */
{
/* Consumes the update region */
gimp_projection_chunk_render_start (proj);
}
}
else if (! now && ! proj->priv->iter && proj->priv->invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->priv->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->priv->projectable);
}
}
static void
gimp_projection_update_priority_rect (GimpProjection *proj)
{
if (proj->priv->iter)
{
GeglRectangle rect;
GeglRectangle bounding_box;
gint off_x, off_y;
rect = proj->priv->priority_rect;
gimp_projectable_get_offset (proj->priv->projectable, &off_x, &off_y);
bounding_box = gimp_projectable_get_bounding_box (proj->priv->projectable);
/* subtract the projectable's offsets because the list of update
* areas is in tile-pyramid coordinates, but our external API is
* always in terms of image coordinates.
*/
rect.x -= off_x;
rect.y -= off_y;
gegl_rectangle_intersect (&rect, &rect, &bounding_box);
gimp_chunk_iterator_set_priority_rect (proj->priv->iter, &rect);
}
}
static void
gimp_projection_chunk_render_start (GimpProjection *proj)
{
cairo_region_t *region = proj->priv->update_region;
gboolean invalidate_preview = FALSE;
if (proj->priv->iter)
{
region = gimp_chunk_iterator_stop (proj->priv->iter, FALSE);
proj->priv->iter = NULL;
if (cairo_region_is_empty (region))
invalidate_preview = proj->priv->invalidate_preview;
if (proj->priv->update_region)
{
cairo_region_union (region, proj->priv->update_region);
cairo_region_destroy (proj->priv->update_region);
}
}
proj->priv->update_region = NULL;
if (region && ! cairo_region_is_empty (region))
{
proj->priv->iter = gimp_chunk_iterator_new (region);
gimp_projection_update_priority_rect (proj);
if (! proj->priv->idle_id)
{
proj->priv->idle_id = g_idle_add_full (
GIMP_PRIORITY_PROJECTION_IDLE + proj->priv->priority,
(GSourceFunc) gimp_projection_chunk_render_callback,
proj, NULL);
}
}
else
{
if (region)
cairo_region_destroy (region);
if (proj->priv->idle_id)
{
g_source_remove (proj->priv->idle_id);
proj->priv->idle_id = 0;
}
if (invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->priv->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->priv->projectable);
}
}
}
static void
gimp_projection_chunk_render_stop (GimpProjection *proj,
gboolean merge)
{
if (proj->priv->idle_id)
{
g_source_remove (proj->priv->idle_id);
proj->priv->idle_id = 0;
}
if (proj->priv->iter)
{
if (merge)
{
cairo_region_t *region;
region = gimp_chunk_iterator_stop (proj->priv->iter, FALSE);
if (proj->priv->update_region)
{
cairo_region_union (proj->priv->update_region, region);
cairo_region_destroy (region);
}
else
{
proj->priv->update_region = region;
}
}
else
{
gimp_chunk_iterator_stop (proj->priv->iter, TRUE);
}
proj->priv->iter = NULL;
}
}
static gboolean
gimp_projection_chunk_render_callback (GimpProjection *proj)
{
if (gimp_projection_chunk_render_iteration (proj))
{
return G_SOURCE_CONTINUE;
}
else
{
proj->priv->idle_id = 0;
return G_SOURCE_REMOVE;
}
}
static gboolean
gimp_projection_chunk_render_iteration (GimpProjection *proj)
{
if (gimp_chunk_iterator_next (proj->priv->iter))
{
GeglRectangle rect;
gimp_tile_handler_validate_begin_validate (proj->priv->validate_handler);
while (gimp_chunk_iterator_get_rect (proj->priv->iter, &rect))
{
gimp_projection_paint_area (proj, TRUE,
rect.x, rect.y, rect.width, rect.height);
}
gimp_tile_handler_validate_end_validate (proj->priv->validate_handler);
/* Still work to do. */
return TRUE;
}
else
{
proj->priv->iter = NULL;
if (proj->priv->invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->priv->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->priv->projectable);
}
/* FINISHED */
return FALSE;
}
}
static void
gimp_projection_paint_area (GimpProjection *proj,
gboolean now,
gint x,
gint y,
gint w,
gint h)
{
gint off_x, off_y;
GeglRectangle bounding_box;
GeglRectangle rect;
gimp_projectable_get_offset (proj->priv->projectable, &off_x, &off_y);
bounding_box = gimp_projectable_get_bounding_box (proj->priv->projectable);
if (gegl_rectangle_intersect (&rect,
GEGL_RECTANGLE (x, y, w, h), &bounding_box))
{
if (now)
{
gimp_tile_handler_validate_validate (
proj->priv->validate_handler,
proj->priv->buffer,
&rect,
FALSE, FALSE);
}
else
{
gimp_tile_handler_validate_invalidate (
proj->priv->validate_handler,
&rect);
}
/* add the projectable's offsets because the list of update areas
* is in tile-pyramid coordinates, but our external API is always
* in terms of image coordinates.
*/
g_signal_emit (proj, projection_signals[UPDATE], 0,
now,
rect.x + off_x,
rect.y + off_y,
rect.width,
rect.height);
}
}
/* image callbacks */
static void
gimp_projection_projectable_invalidate (GimpProjectable *projectable,
gint x,
gint y,
gint w,
gint h,
GimpProjection *proj)
{
gint off_x, off_y;
gimp_projectable_get_offset (proj->priv->projectable, &off_x, &off_y);
/* subtract the projectable's offsets because the list of update
* areas is in tile-pyramid coordinates, but our external API is
* always in terms of image coordinates.
*/
x -= off_x;
y -= off_y;
gimp_projection_add_update_area (proj, x, y, w, h);
}
static void
gimp_projection_projectable_flush (GimpProjectable *projectable,
gboolean invalidate_preview,
GimpProjection *proj)
{
if (invalidate_preview)
proj->priv->invalidate_preview = TRUE;
gimp_projection_flush (proj);
}
static void
gimp_projection_projectable_structure_changed (GimpProjectable *projectable,
GimpProjection *proj)
{
GeglRectangle bounding_box;
gimp_projection_free_buffer (proj);
bounding_box = gimp_projectable_get_bounding_box (projectable);
gimp_projection_add_update_area (proj,
bounding_box.x, bounding_box.y,
bounding_box.width, bounding_box.height);
}
static void
gimp_projection_projectable_bounds_changed (GimpProjectable *projectable,
gint old_x,
gint old_y,
GimpProjection *proj)
{
GeglBuffer *old_buffer = proj->priv->buffer;
GimpTileHandlerValidate *old_validate_handler;
GeglRectangle old_bounding_box;
GeglRectangle bounding_box;
GeglRectangle old_bounds;
GeglRectangle bounds;
GeglRectangle int_bounds;
gint x, y;
gint dx, dy;
if (! old_buffer)
{
gimp_projection_projectable_structure_changed (projectable, proj);
return;
}
old_bounding_box = *gegl_buffer_get_extent (old_buffer);
gimp_projectable_get_offset (projectable, &x, &y);
bounding_box = gimp_projectable_get_bounding_box (projectable);
if (x == old_x && y == old_y &&
gegl_rectangle_equal (&bounding_box, &old_bounding_box))
{
return;
}
old_bounds = old_bounding_box;
old_bounds.x += old_x;
old_bounds.y += old_y;
bounds = bounding_box;
bounds.x += x;
bounds.y += y;
if (! gegl_rectangle_intersect (&int_bounds, &bounds, &old_bounds))
{
gimp_projection_projectable_structure_changed (projectable, proj);
return;
}
dx = x - old_x;
dy = y - old_y;
#if 1
/* FIXME: when there's an offset between the new bounds and the old bounds,
* use gimp_projection_projectable_structure_changed(), instead of copying a
* shifted version of the old buffer, since the synchronous copy can take a
* notable amount of time for big buffers, when the offset is such that tiles
* are not COW-ed. while gimp_projection_projectable_structure_changed()
* causes the projection to be re-rendered, which is overall slower, it's
* done asynchronously.
*
* this needs to be improved.
*/
if (dx || dy)
{
gimp_projection_projectable_structure_changed (projectable, proj);
return;
}
#endif
/* reallocate the buffer, and copy the old buffer to the corresponding
* region of the new buffer.
*/
gimp_projection_chunk_render_stop (proj, TRUE);
if (dx == 0 && dy == 0)
{
gimp_tile_handler_validate_buffer_set_extent (old_buffer, &bounding_box);
}
else
{
old_validate_handler = proj->priv->validate_handler;
proj->priv->buffer = NULL;
proj->priv->validate_handler = NULL;
gimp_projection_allocate_buffer (proj);
gimp_tile_handler_validate_buffer_copy (
old_buffer,
GEGL_RECTANGLE (int_bounds.x - old_x,
int_bounds.y - old_y,
int_bounds.width,
int_bounds.height),
proj->priv->buffer,
GEGL_RECTANGLE (int_bounds.x - x,
int_bounds.y - y,
int_bounds.width,
int_bounds.height));
gimp_tile_handler_validate_unassign (old_validate_handler,
old_buffer);
g_object_unref (old_validate_handler);
g_object_unref (old_buffer);
}
if (proj->priv->update_region)
{
cairo_region_translate (proj->priv->update_region, dx, dy);
cairo_region_intersect_rectangle (
proj->priv->update_region,
(const cairo_rectangle_int_t *) &bounding_box);
}
int_bounds.x -= x;
int_bounds.y -= y;
if (int_bounds.x > bounding_box.x)
{
gimp_projection_add_update_area (proj,
bounding_box.x,
bounding_box.y,
int_bounds.x - bounding_box.x,
bounding_box.height);
}
if (int_bounds.y > bounding_box.y)
{
gimp_projection_add_update_area (proj,
bounding_box.x,
bounding_box.y,
bounding_box.width,
int_bounds.y - bounding_box.y);
}
if (int_bounds.x + int_bounds.width < bounding_box.x + bounding_box.width)
{
gimp_projection_add_update_area (proj,
int_bounds.x + int_bounds.width,
bounding_box.y,
bounding_box.x + bounding_box.width -
(int_bounds.x + int_bounds.width),
bounding_box.height);
}
if (int_bounds.y + int_bounds.height < bounding_box.y + bounding_box.height)
{
gimp_projection_add_update_area (proj,
bounding_box.x,
int_bounds.y + int_bounds.height,
bounding_box.width,
bounding_box.y + bounding_box.height -
(int_bounds.y + int_bounds.height));
}
proj->priv->invalidate_preview = TRUE;
}
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