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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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <cairo.h>
#include <gegl.h>
#include "core-types.h"
#include "gegl/gimp-babl.h"
#include "gegl/gimp-gegl-utils.h"
#include "gegl/gimptilehandlerprojection.h"
#include "gimp.h"
#include "gimp-utils.h"
#include "gimparea.h"
#include "gimpimage.h"
#include "gimpmarshal.h"
#include "gimppickable.h"
#include "gimpprojectable.h"
#include "gimpprojection.h"
/* halfway between G_PRIORITY_HIGH_IDLE and G_PRIORITY_DEFAULT_IDLE */
#define GIMP_PROJECTION_IDLE_PRIORITY ((G_PRIORITY_HIGH_IDLE + \
G_PRIORITY_DEFAULT_IDLE) / 2)
/* chunk size for one iteration of the idle renderer */
#define GIMP_PROJECTION_IDLE_CHUNK_WIDTH 256
#define GIMP_PROJECTION_IDLE_CHUNK_HEIGHT 128
enum
{
UPDATE,
LAST_SIGNAL
};
/* local function prototypes */
static void gimp_projection_pickable_iface_init (GimpPickableInterface *iface);
static void gimp_projection_finalize (GObject *object);
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_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);
static void gimp_projection_idle_render_init (GimpProjection *proj);
static gboolean gimp_projection_idle_render_callback (gpointer data);
static gboolean gimp_projection_idle_render_next_area (GimpProjection *proj);
static void gimp_projection_paint_area (GimpProjection *proj,
gboolean now,
gint x,
gint y,
gint w,
gint h);
static void gimp_projection_invalidate (GimpProjection *proj,
guint x,
guint y,
guint w,
guint 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_changed (GimpProjectable *projectable,
GimpProjection *proj);
G_DEFINE_TYPE_WITH_CODE (GimpProjection, gimp_projection, GIMP_TYPE_OBJECT,
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;
gimp_object_class->get_memsize = gimp_projection_get_memsize;
}
static void
gimp_projection_init (GimpProjection *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;
}
static void
gimp_projection_finalize (GObject *object)
{
GimpProjection *proj = GIMP_PROJECTION (object);
if (proj->idle_render.idle_id)
{
g_source_remove (proj->idle_render.idle_id);
proj->idle_render.idle_id = 0;
}
gimp_area_list_free (proj->update_areas);
proj->update_areas = NULL;
gimp_area_list_free (proj->idle_render.update_areas);
proj->idle_render.update_areas = NULL;
gimp_projection_free_buffer (proj);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint64
gimp_projection_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpProjection *projection = GIMP_PROJECTION (object);
gint64 memsize = 0;
memsize += gimp_gegl_buffer_get_memsize (projection->buffer);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
/**
* gimp_projection_estimate_memsize:
* @type: the projectable's base type
* @precision: the projectable's precision
* @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.
*
* Return value: a rough estimate of the memory requirements.
**/
gint64
gimp_projection_estimate_memsize (GimpImageBaseType type,
GimpPrecision precision,
gint width,
gint height)
{
const Babl *format;
gint64 bytes;
if (type == GIMP_INDEXED)
type = GIMP_RGB;
format = gimp_babl_format (type, precision, TRUE);
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);
if (proj->invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->projectable);
}
}
static GimpImage *
gimp_projection_get_image (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
return gimp_projectable_get_image (proj->projectable);
}
static const Babl *
gimp_projection_get_format (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
return gimp_projectable_get_format (proj->projectable);
}
static GeglBuffer *
gimp_projection_get_buffer (GimpPickable *pickable)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
if (! proj->buffer)
{
GeglNode *graph;
const Babl *format;
gint width;
gint height;
graph = gimp_projectable_get_graph (proj->projectable);
format = gimp_projection_get_format (GIMP_PICKABLE (proj));
gimp_projectable_get_size (proj->projectable, &width, &height);
proj->buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, width, height),
format);
proj->validate_handler = gimp_tile_handler_projection_new (graph,
width, height);
gegl_buffer_add_handler (proj->buffer, proj->validate_handler);
/* This used to call gimp_tile_handler_projection_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, 0, 0, width, height);
proj->invalidate_preview = TRUE;
gimp_projection_flush (proj);
}
return proj->buffer;
}
static gboolean
gimp_projection_get_pixel_at (GimpPickable *pickable,
gint x,
gint y,
const Babl *format,
gpointer pixel)
{
GeglBuffer *buffer = gimp_projection_get_buffer (pickable);
if (x < 0 ||
y < 0 ||
x >= gegl_buffer_get_width (buffer) ||
y >= gegl_buffer_get_height (buffer))
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;
}
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->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_changed),
proj, 0);
return proj;
}
void
gimp_projection_flush (GimpProjection *proj)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
/* Construct on idle time */
gimp_projection_flush_whenever (proj, FALSE);
}
void
gimp_projection_flush_now (GimpProjection *proj)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
/* Construct NOW */
gimp_projection_flush_whenever (proj, TRUE);
}
void
gimp_projection_finish_draw (GimpProjection *proj)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
if (proj->idle_render.idle_id)
{
g_source_remove (proj->idle_render.idle_id);
proj->idle_render.idle_id = 0;
while (gimp_projection_idle_render_callback (proj));
}
}
/* private functions */
static void
gimp_projection_free_buffer (GimpProjection *proj)
{
if (proj->buffer)
{
if (proj->validate_handler)
gegl_buffer_remove_handler (proj->buffer, proj->validate_handler);
g_object_unref (proj->buffer);
proj->buffer = NULL;
}
if (proj->validate_handler)
{
g_object_unref (proj->validate_handler);
proj->validate_handler = NULL;
}
}
static void
gimp_projection_add_update_area (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
GimpArea *area;
gint off_x, off_y;
gint width, height;
gimp_projectable_get_offset (proj->projectable, &off_x, &off_y);
gimp_projectable_get_size (proj->projectable, &width, &height);
/* 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;
area = gimp_area_new (CLAMP (x, 0, width),
CLAMP (y, 0, height),
CLAMP (x + w, 0, width),
CLAMP (y + h, 0, height));
proj->update_areas = gimp_area_list_process (proj->update_areas, area);
}
static void
gimp_projection_flush_whenever (GimpProjection *proj,
gboolean now)
{
/* First the updates... */
if (proj->update_areas)
{
if (now) /* Synchronous */
{
GSList *list;
for (list = proj->update_areas; list; list = g_slist_next (list))
{
GimpArea *area = list->data;
if ((area->x1 != area->x2) && (area->y1 != area->y2))
{
gimp_projection_paint_area (proj,
FALSE, /* sic! */
area->x1,
area->y1,
(area->x2 - area->x1),
(area->y2 - area->y1));
}
}
}
else /* Asynchronous */
{
gimp_projection_idle_render_init (proj);
}
/* Free the update lists */
gimp_area_list_free (proj->update_areas);
proj->update_areas = NULL;
}
else if (! now && proj->invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->projectable);
}
}
static void
gimp_projection_idle_render_init (GimpProjection *proj)
{
GSList *list;
/* We need to merge the IdleRender's and the GimpProjection's update_areas
* list to keep track of which of the updates have been flushed and hence
* need to be drawn.
*/
for (list = proj->update_areas; list; list = g_slist_next (list))
{
GimpArea *area = list->data;
proj->idle_render.update_areas =
gimp_area_list_process (proj->idle_render.update_areas,
gimp_area_new (area->x1, area->y1,
area->x2, area->y2));
}
/* If an idlerender was already running, merge the remainder of its
* unrendered area with the update_areas list, and make it start work
* on the next unrendered area in the list.
*/
if (proj->idle_render.idle_id)
{
GimpArea *area =
gimp_area_new (proj->idle_render.base_x,
proj->idle_render.y,
proj->idle_render.base_x + proj->idle_render.width,
proj->idle_render.y + (proj->idle_render.height -
(proj->idle_render.y -
proj->idle_render.base_y)));
proj->idle_render.update_areas =
gimp_area_list_process (proj->idle_render.update_areas, area);
gimp_projection_idle_render_next_area (proj);
}
else
{
if (proj->idle_render.update_areas == NULL)
{
g_warning ("%s: wanted to start idle render with no update_areas",
G_STRFUNC);
return;
}
gimp_projection_idle_render_next_area (proj);
proj->idle_render.idle_id =
g_idle_add_full (GIMP_PROJECTION_IDLE_PRIORITY,
gimp_projection_idle_render_callback, proj,
NULL);
}
}
/* Unless specified otherwise, projection re-rendering is organised by
* IdleRender, which amalgamates areas to be re-rendered and breaks
* them into bite-sized chunks which are chewed on in a low- priority
* idle thread. This greatly improves responsiveness for many GIMP
* operations. -- Adam
*/
static gboolean
gimp_projection_idle_render_callback (gpointer data)
{
GimpProjection *proj = data;
gint workx, worky;
gint workw, workh;
workw = GIMP_PROJECTION_IDLE_CHUNK_WIDTH;
workh = GIMP_PROJECTION_IDLE_CHUNK_HEIGHT;
workx = proj->idle_render.x;
worky = proj->idle_render.y;
if (workx + workw > proj->idle_render.base_x + proj->idle_render.width)
{
workw = proj->idle_render.base_x + proj->idle_render.width - workx;
}
if (worky + workh > proj->idle_render.base_y + proj->idle_render.height)
{
workh = proj->idle_render.base_y + proj->idle_render.height - worky;
}
gimp_projection_paint_area (proj, TRUE /* sic! */,
workx, worky, workw, workh);
proj->idle_render.x += GIMP_PROJECTION_IDLE_CHUNK_WIDTH;
if (proj->idle_render.x >=
proj->idle_render.base_x + proj->idle_render.width)
{
proj->idle_render.x = proj->idle_render.base_x;
proj->idle_render.y += GIMP_PROJECTION_IDLE_CHUNK_HEIGHT;
if (proj->idle_render.y >=
proj->idle_render.base_y + proj->idle_render.height)
{
if (! gimp_projection_idle_render_next_area (proj))
{
/* FINISHED */
proj->idle_render.idle_id = 0;
if (proj->invalidate_preview)
{
/* invalidate the preview here since it is constructed from
* the projection
*/
proj->invalidate_preview = FALSE;
gimp_projectable_invalidate_preview (proj->projectable);
}
return FALSE;
}
}
}
/* Still work to do. */
return TRUE;
}
static gboolean
gimp_projection_idle_render_next_area (GimpProjection *proj)
{
GimpArea *area;
if (! proj->idle_render.update_areas)
return FALSE;
area = proj->idle_render.update_areas->data;
proj->idle_render.update_areas =
g_slist_remove (proj->idle_render.update_areas, area);
proj->idle_render.x = proj->idle_render.base_x = area->x1;
proj->idle_render.y = proj->idle_render.base_y = area->y1;
proj->idle_render.width = area->x2 - area->x1;
proj->idle_render.height = area->y2 - area->y1;
gimp_area_free (area);
return TRUE;
}
static void
gimp_projection_paint_area (GimpProjection *proj,
gboolean now,
gint x,
gint y,
gint w,
gint h)
{
gint off_x, off_y;
gint width, height;
gint x1, y1, x2, y2;
gimp_projectable_get_offset (proj->projectable, &off_x, &off_y);
gimp_projectable_get_size (proj->projectable, &width, &height);
/* Bounds check */
x1 = CLAMP (x, 0, width);
y1 = CLAMP (y, 0, height);
x2 = CLAMP (x + w, 0, width);
y2 = CLAMP (y + h, 0, height);
gimp_projection_invalidate (proj, x1, y1, x2 - x1, y2 - y1);
/* 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,
x1 + off_x,
y1 + off_y,
x2 - x1,
y2 - y1);
}
static void
gimp_projection_invalidate (GimpProjection *proj,
guint x,
guint y,
guint w,
guint h)
{
if (proj->validate_handler)
gimp_tile_handler_projection_invalidate (proj->validate_handler,
x, y, w, h);
}
/* image callbacks */
static void
gimp_projection_projectable_invalidate (GimpProjectable *projectable,
gint x,
gint y,
gint w,
gint h,
GimpProjection *proj)
{
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->invalidate_preview = TRUE;
gimp_projection_flush (proj);
}
static void
gimp_projection_projectable_changed (GimpProjectable *projectable,
GimpProjection *proj)
{
gint off_x, off_y;
gint width, height;
if (proj->idle_render.idle_id)
{
g_source_remove (proj->idle_render.idle_id);
proj->idle_render.idle_id = 0;
}
gimp_area_list_free (proj->update_areas);
proj->update_areas = NULL;
gimp_projection_free_buffer (proj);
gimp_projectable_get_offset (proj->projectable, &off_x, &off_y);
gimp_projectable_get_size (projectable, &width, &height);
gimp_projection_add_update_area (proj, off_x, off_y, width, height);
}
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