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gimp/app/core/gimpprojection-construct.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 <gegl.h>
#include "core-types.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "paint-funcs/paint-funcs.h"
#include "gimplayer.h"
#include "gimppickable.h"
#include "gimpprojectable.h"
#include "gimpprojection.h"
#include "gimpprojection-construct.h"
/* local function prototypes */
static void gimp_projection_construct_gegl (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h);
static void gimp_projection_construct_legacy (GimpProjection *proj,
gboolean with_layers,
gint x,
gint y,
gint w,
gint h);
static void gimp_projection_initialize (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h);
/* public functions */
void
gimp_projection_construct (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
g_return_if_fail (GIMP_IS_PROJECTION (proj));
#if 0
GList *layers = gimp_projectable_get_layers (proj->projectable);
if (layers && ! layers->next) /* a single layer */
{
GimpLayer *layer = layers->data;
GimpDrawable *drawable = GIMP_DRAWABLE (layer);
GimpItem *item = GIMP_ITEM (layer);
gint width, height;
gint off_x, off_y;
gimp_projectable_get_offset (proj->projectable, &proj_off_x, &proj_off_y);
gimp_projectable_get_size (proj->projectable, &width, &height);
gimp_item_get_offset (item, &off_x, &off_y);
if (gimp_drawable_has_alpha (drawable) &&
gimp_item_get_visible (item) &&
gimp_item_get_width (item) == width &&
gimp_item_get_height (item) == height &&
! gimp_drawable_is_indexed (layer) &&
gimp_layer_get_opacity (layer) == GIMP_OPACITY_OPAQUE &&
off_x == 0 &&
off_y == 0 &&
proj_offset_x == 0 &&
proj_offset_y == 0)
{
PixelRegion srcPR, destPR;
g_printerr ("cow-projection!");
pixel_region_init (&srcPR,
gimp_drawable_get_tiles (layer),
x, y, w,h, FALSE);
pixel_region_init (&destPR,
gimp_pickable_get_tiles (GIMP_PICKABLE (proj)),
x, y, w,h, TRUE);
copy_region (&srcPR, &destPR);
proj->construct_flag = TRUE;
gimp_projection_construct_legacy (proj, FALSE, x, y, w, h);
return;
}
}
#endif
/* First, determine if the projection image needs to be
* initialized--this is the case when there are no visible
* layers that cover the entire canvas--either because layers
* are offset or only a floating selection is visible
*/
gimp_projection_initialize (proj, x, y, w, h);
/* call functions which process the list of layers and
* the list of channels
*/
if (proj->use_gegl)
{
gimp_projection_construct_gegl (proj, x, y, w, h);
}
else
{
proj->construct_flag = FALSE;
gimp_projection_construct_legacy (proj, TRUE, x, y, w, h);
}
}
/* private functions */
static void
gimp_projection_construct_gegl (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
GeglNode *sink;
GeglRectangle rect;
sink = gimp_projection_get_sink_node (proj);
rect.x = x;
rect.y = y;
rect.width = w;
rect.height = h;
if (! proj->processor)
proj->processor = gegl_node_new_processor (sink, &rect);
else
gegl_processor_set_rectangle (proj->processor, &rect);
while (gegl_processor_work (proj->processor, NULL));
/* FIXME: Reuse it when it can handle dirty rects when painting
* properly
*/
g_object_unref (proj->processor);
proj->processor = NULL;
}
static void
gimp_projection_construct_legacy (GimpProjection *proj,
gboolean with_layers,
gint x,
gint y,
gint w,
gint h)
{
GList *list;
GList *reverse_list = NULL;
gint proj_off_x;
gint proj_off_y;
for (list = gimp_projectable_get_channels (proj->projectable);
list;
list = g_list_next (list))
{
if (gimp_item_get_visible (GIMP_ITEM (list->data)))
{
reverse_list = g_list_prepend (reverse_list, list->data);
}
}
if (with_layers)
{
for (list = gimp_projectable_get_layers (proj->projectable);
list;
list = g_list_next (list))
{
GimpLayer *layer = list->data;
if (! gimp_layer_is_floating_sel (layer) &&
gimp_item_get_visible (GIMP_ITEM (layer)))
{
/* only add layers that are visible and not floating selections
* to the list
*/
reverse_list = g_list_prepend (reverse_list, layer);
}
}
}
gimp_projectable_get_offset (proj->projectable, &proj_off_x, &proj_off_y);
for (list = reverse_list; list; list = g_list_next (list))
{
GimpItem *item = list->data;
PixelRegion projPR;
gint x1, y1;
gint x2, y2;
gint off_x;
gint off_y;
gimp_item_get_offset (item, &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.
*/
off_x -= proj_off_x;
off_y -= proj_off_y;
x1 = CLAMP (off_x, x, x + w);
y1 = CLAMP (off_y, y, y + h);
x2 = CLAMP (off_x + gimp_item_get_width (item), x, x + w);
y2 = CLAMP (off_y + gimp_item_get_height (item), y, y + h);
pixel_region_init (&projPR,
gimp_pickable_get_tiles (GIMP_PICKABLE (proj)),
x1, y1, x2 - x1, y2 - y1,
TRUE);
gimp_drawable_project_region (GIMP_DRAWABLE (item),
x1 - off_x, y1 - off_y,
x2 - x1, y2 - y1,
&projPR,
proj->construct_flag);
proj->construct_flag = TRUE; /* something was projected */
}
g_list_free (reverse_list);
}
/**
* gimp_projection_initialize:
* @proj: A #GimpProjection.
* @x:
* @y:
* @w:
* @h:
*
* This function determines whether a visible layer with combine mode
* Normal provides complete coverage over the specified area. If not,
* the projection is initialized to transparent black.
*/
static void
gimp_projection_initialize (GimpProjection *proj,
gint x,
gint y,
gint w,
gint h)
{
GList *list;
gint proj_off_x;
gint proj_off_y;
gboolean coverage = FALSE;
gimp_projectable_get_offset (proj->projectable, &proj_off_x, &proj_off_y);
for (list = gimp_projectable_get_layers (proj->projectable);
list;
list = g_list_next (list))
{
GimpLayer *layer = list->data;
GimpDrawable *drawable = GIMP_DRAWABLE (layer);
GimpItem *item = GIMP_ITEM (layer);
gint off_x, off_y;
gimp_item_get_offset (item, &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.
*/
off_x -= proj_off_x;
off_y -= proj_off_y;
if (gimp_item_get_visible (item) &&
! gimp_drawable_has_alpha (drawable) &&
! gimp_layer_get_mask (layer) &&
gimp_layer_get_mode (layer) == GIMP_NORMAL_MODE &&
gimp_layer_get_opacity (layer) == GIMP_OPACITY_OPAQUE &&
off_x <= x &&
off_y <= y &&
(off_x + gimp_item_get_width (item)) >= (x + w) &&
(off_y + gimp_item_get_height (item)) >= (y + h))
{
coverage = TRUE;
break;
}
}
if (! coverage)
{
PixelRegion region;
pixel_region_init (&region,
gimp_pickable_get_tiles (GIMP_PICKABLE (proj)),
x, y, w, h, TRUE);
clear_region (&region);
}
}
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