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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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <glib-object.h>
#include "core-types.h"
#include "base/tile.h"
#include "base/tile-manager.h"
#include "base/tile-pyramid.h"
#include "gimp.h"
#include "gimparea.h"
#include "gimpimage.h"
#include "gimpmarshal.h"
#include "gimppickable.h"
#include "gimpprojection.h"
#include "gimpprojection-construct.h"
/* halfway between G_PRIORITY_HIGH_IDLE and G_PRIORITY_DEFAULT_IDLE */
#define GIMP_PROJECTION_IDLE_PRIORITY 150
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 gboolean gimp_projection_get_pixel_at (GimpPickable *pickable,
gint x,
gint y,
guchar *pixel);
static gint gimp_projection_get_opacity_at (GimpPickable *pickable,
gint x,
gint y);
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_validate_tile (TileManager *tm,
Tile *tile,
GimpProjection *proj);
static void gimp_projection_image_update (GimpImage *image,
gint x,
gint y,
gint w,
gint h,
GimpProjection *proj);
static void gimp_projection_image_size_changed (GimpImage *image,
GimpProjection *proj);
static void gimp_projection_image_mode_changed (GimpImage *image,
GimpProjection *proj);
static void gimp_projection_image_flush (GimpImage *image,
gboolean invalidate_preview,
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)
{
proj->image = NULL;
proj->pyramid = NULL;
proj->update_areas = NULL;
proj->idle_render.idle_id = 0;
proj->idle_render.update_areas = NULL;
proj->construct_flag = FALSE;
}
/* sorry for the evil casts */
static void
gimp_projection_pickable_iface_init (GimpPickableInterface *iface)
{
iface->flush = gimp_projection_pickable_flush;
iface->get_image = (GimpImage * (*) (GimpPickable *pickable)) gimp_projection_get_image;
iface->get_image_type = (GimpImageType (*) (GimpPickable *pickable)) gimp_projection_get_image_type;
iface->get_bytes = (gint (*) (GimpPickable *pickable)) gimp_projection_get_bytes;
iface->get_tiles = (TileManager * (*) (GimpPickable *pickable)) gimp_projection_get_tiles;
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;
if (proj->pyramid)
{
tile_pyramid_destroy (proj->pyramid);
proj->pyramid = NULL;
}
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;
if (projection->pyramid)
memsize = tile_pyramid_get_memsize (projection->pyramid);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
/**
* gimp_projection_estimate_memsize:
* @type: the image base type
* @width: image width
* @height: image 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,
gint width,
gint height)
{
gint64 bytes = 0;
switch (type)
{
case GIMP_RGB:
case GIMP_INDEXED:
bytes = 4;
break;
case GIMP_GRAY:
bytes = 2;
break;
}
/* 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);
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_viewable_invalidate_preview (GIMP_VIEWABLE (proj->image));
}
}
static gboolean
gimp_projection_get_pixel_at (GimpPickable *pickable,
gint x,
gint y,
guchar *pixel)
{
GimpProjection *proj = GIMP_PROJECTION (pickable);
if (x < 0 ||
y < 0 ||
x >= gimp_image_get_width (proj->image) ||
y >= gimp_image_get_height (proj->image))
return FALSE;
read_pixel_data_1 (gimp_projection_get_tiles (proj), x, y, pixel);
return TRUE;
}
static gint
gimp_projection_get_opacity_at (GimpPickable *pickable,
gint x,
gint y)
{
return OPAQUE_OPACITY;
}
GimpProjection *
gimp_projection_new (GimpImage *image)
{
GimpProjection *proj;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
proj = g_object_new (GIMP_TYPE_PROJECTION, NULL);
proj->image = image;
g_signal_connect_object (image, "update",
G_CALLBACK (gimp_projection_image_update),
proj, 0);
g_signal_connect_object (image, "size-changed",
G_CALLBACK (gimp_projection_image_size_changed),
proj, 0);
g_signal_connect_object (image, "mode-changed",
G_CALLBACK (gimp_projection_image_mode_changed),
proj, 0);
g_signal_connect_object (image, "flush",
G_CALLBACK (gimp_projection_image_flush),
proj, 0);
return proj;
}
TileManager *
gimp_projection_get_tiles (GimpProjection *proj)
{
return gimp_projection_get_tiles_at_level (proj, 0, NULL);
}
TileManager *
gimp_projection_get_tiles_at_level (GimpProjection *proj,
gint level,
gboolean *is_premult)
{
g_return_val_if_fail (GIMP_IS_PROJECTION (proj), NULL);
if (! proj->pyramid)
{
proj->pyramid = tile_pyramid_new (gimp_projection_get_image_type (proj),
gimp_image_get_width (proj->image),
gimp_image_get_height (proj->image));
tile_pyramid_set_validate_proc (proj->pyramid,
(TileValidateProc) gimp_projection_validate_tile,
proj);
}
return tile_pyramid_get_tiles (proj->pyramid, level, is_premult);
}
/**
* gimp_projection_get_level:
* @proj: pointer to a GimpProjection
* @scale_x: horizontal scale factor
* @scale_y: vertical scale factor
*
* This function returns the optimal pyramid level for a given scale factor.
*
* Return value: the pyramid level to use for a given display scale factor.
**/
gint
gimp_projection_get_level (GimpProjection *proj,
gdouble scale_x,
gdouble scale_y)
{
return tile_pyramid_get_level (gimp_image_get_width (proj->image),
gimp_image_get_height (proj->image),
MAX (scale_x, scale_y));
}
GimpImage *
gimp_projection_get_image (const GimpProjection *proj)
{
g_return_val_if_fail (GIMP_IS_PROJECTION (proj), NULL);
return proj->image;
}
GimpImageType
gimp_projection_get_image_type (const GimpProjection *proj)
{
g_return_val_if_fail (GIMP_IS_PROJECTION (proj), -1);
switch (gimp_image_base_type (proj->image))
{
case GIMP_RGB:
case GIMP_INDEXED:
return GIMP_RGBA_IMAGE;
case GIMP_GRAY:
return GIMP_GRAYA_IMAGE;
}
g_assert_not_reached ();
return 0;
}
gint
gimp_projection_get_bytes (const GimpProjection *proj)
{
g_return_val_if_fail (GIMP_IS_PROJECTION (proj), 0);
return GIMP_IMAGE_TYPE_BYTES (gimp_projection_get_image_type (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)
{
#if 0
g_printerr ("%s: flushing idle render queue\n", G_STRFUNC);
#endif
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_add_update_area (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
GimpArea *area;
g_return_if_fail (GIMP_IS_PROJECTION (proj));
area = gimp_area_new (CLAMP (x, 0, gimp_image_get_width (proj->image)),
CLAMP (y, 0, gimp_image_get_height (proj->image)),
CLAMP (x + w, 0, gimp_image_get_width (proj->image)),
CLAMP (y + h, 0, gimp_image_get_height (proj->image)));
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_viewable_invalidate_preview (GIMP_VIEWABLE (proj->image));
}
}
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;
#define CHUNK_WIDTH 256
#define CHUNK_HEIGHT 128
workw = CHUNK_WIDTH;
workh = 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 += 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 += 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_viewable_invalidate_preview (GIMP_VIEWABLE (proj->image));
}
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)
{
/* Bounds check */
gint x1 = CLAMP (x, 0, gimp_image_get_width (proj->image));
gint y1 = CLAMP (y, 0, gimp_image_get_height (proj->image));
gint x2 = CLAMP (x + w, 0, gimp_image_get_width (proj->image));
gint y2 = CLAMP (y + h, 0, gimp_image_get_height (proj->image));
gimp_projection_invalidate (proj, x1, y1, x2 - x1, y2 - y1);
g_signal_emit (proj, projection_signals[UPDATE], 0,
now, x1, y1, x2 - x1, y2 - y1);
}
static void
gimp_projection_invalidate (GimpProjection *proj,
guint x,
guint y,
guint w,
guint h)
{
if (proj->pyramid)
tile_pyramid_invalidate_area (proj->pyramid, x, y, w, h);
}
static void
gimp_projection_validate_tile (TileManager *tm,
Tile *tile,
GimpProjection *proj)
{
gint x, y;
/* Find the coordinates of this tile */
tile_manager_get_tile_coordinates (tm, tile, &x, &y);
gimp_projection_construct (proj,
x, y,
tile_ewidth (tile), tile_eheight (tile));
}
/* image callbacks */
static void
gimp_projection_image_update (GimpImage *image,
gint x,
gint y,
gint w,
gint h,
GimpProjection *proj)
{
gimp_projection_add_update_area (proj, x, y, w, h);
}
static void
gimp_projection_image_size_changed (GimpImage *image,
GimpProjection *proj)
{
if (proj->pyramid)
{
tile_pyramid_destroy (proj->pyramid);
proj->pyramid = NULL;
}
gimp_projection_add_update_area (proj,
0, 0,
gimp_image_get_width (image),
gimp_image_get_height (image));
}
static void
gimp_projection_image_mode_changed (GimpImage *image,
GimpProjection *proj)
{
if (proj->pyramid)
{
tile_pyramid_destroy (proj->pyramid);
proj->pyramid = NULL;
}
gimp_projection_add_update_area (proj,
0, 0,
gimp_image_get_width (image),
gimp_image_get_height (image));
}
static void
gimp_projection_image_flush (GimpImage *image,
gboolean invalidate_preview,
GimpProjection *proj)
{
if (invalidate_preview)
proj->invalidate_preview = TRUE;
gimp_projection_flush (proj);
}
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