mirror of https://github.com/GNOME/gimp.git
301 lines
9.6 KiB
C
301 lines
9.6 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <gegl.h>
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#include "core-types.h"
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#include "base/pixel-region.h"
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#include "base/tile-manager.h"
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#include "paint-funcs/paint-funcs.h"
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#include "gimplayer.h"
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#include "gimppickable.h"
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#include "gimpprojectable.h"
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#include "gimpprojection.h"
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#include "gimpprojection-construct.h"
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/* local function prototypes */
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static void gimp_projection_construct_gegl (GimpProjection *proj,
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gint x,
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gint y,
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gint w,
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gint h);
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static void gimp_projection_construct_legacy (GimpProjection *proj,
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gboolean with_layers,
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gint x,
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gint y,
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gint w,
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gint h);
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static void gimp_projection_initialize (GimpProjection *proj,
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gint x,
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gint y,
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gint w,
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gint h);
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/* public functions */
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void
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gimp_projection_construct (GimpProjection *proj,
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gint x,
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gint y,
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gint w,
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gint h)
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{
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g_return_if_fail (GIMP_IS_PROJECTION (proj));
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#if 0
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GList *layers = gimp_projectable_get_layers (proj->projectable);
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if (layers && ! layers->next) /* a single layer */
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{
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GimpLayer *layer = layers->data;
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GimpDrawable *drawable = GIMP_DRAWABLE (layer);
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GimpItem *item = GIMP_ITEM (layer);
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gint width, height;
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gint off_x, off_y;
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gimp_projectable_get_size (proj->projectable, &width, &height);
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gimp_item_get_offset (item, &off_x, &off_y);
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if (gimp_drawable_has_alpha (drawable) &&
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gimp_item_get_visible (item) &&
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gimp_item_get_width (item) == width &&
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gimp_item_get_height (item) == height &&
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! gimp_drawable_is_indexed (layer) &&
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gimp_layer_get_opacity (layer) == GIMP_OPACITY_OPAQUE &&
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off_x == 0 &&
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off_y == 0)
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{
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PixelRegion srcPR, destPR;
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g_printerr ("cow-projection!");
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pixel_region_init (&srcPR,
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gimp_drawable_get_tiles (layer),
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x, y, w,h, FALSE);
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pixel_region_init (&destPR,
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gimp_pickable_get_tiles (GIMP_PICKABLE (proj)),
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x, y, w,h, TRUE);
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copy_region (&srcPR, &destPR);
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proj->construct_flag = TRUE;
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gimp_projection_construct_legacy (proj, FALSE, x, y, w, h);
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return;
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}
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}
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#endif
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/* First, determine if the projection image needs to be
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* initialized--this is the case when there are no visible
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* layers that cover the entire canvas--either because layers
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* are offset or only a floating selection is visible
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*/
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gimp_projection_initialize (proj, x, y, w, h);
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/* call functions which process the list of layers and
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* the list of channels
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*/
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if (proj->use_gegl)
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{
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gimp_projection_construct_gegl (proj, x, y, w, h);
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}
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else
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{
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proj->construct_flag = FALSE;
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gimp_projection_construct_legacy (proj, TRUE, x, y, w, h);
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}
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}
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/* private functions */
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static void
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gimp_projection_construct_gegl (GimpProjection *proj,
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gint x,
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gint y,
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gint w,
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gint h)
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{
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GeglNode *sink;
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GeglRectangle rect;
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sink = gimp_projection_get_sink_node (proj);
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rect.x = x;
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rect.y = y;
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rect.width = w;
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rect.height = h;
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if (! proj->processor)
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proj->processor = gegl_node_new_processor (sink, &rect);
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else
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gegl_processor_set_rectangle (proj->processor, &rect);
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while (gegl_processor_work (proj->processor, NULL));
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#ifdef __GNUC__
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#warning FIXME: keep the processor around once gegl_processor_set_rectangle() works
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#endif
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g_object_unref (proj->processor);
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proj->processor = NULL;
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}
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static void
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gimp_projection_construct_legacy (GimpProjection *proj,
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gboolean with_layers,
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gint x,
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gint y,
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gint w,
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gint h)
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{
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GList *list;
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GList *reverse_list = NULL;
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for (list = gimp_projectable_get_channels (proj->projectable);
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list;
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list = g_list_next (list))
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{
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if (gimp_item_get_visible (GIMP_ITEM (list->data)))
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{
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reverse_list = g_list_prepend (reverse_list, list->data);
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}
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}
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if (with_layers)
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{
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for (list = gimp_projectable_get_layers (proj->projectable);
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list;
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list = g_list_next (list))
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{
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GimpLayer *layer = list->data;
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if (! gimp_layer_is_floating_sel (layer) &&
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gimp_item_get_visible (GIMP_ITEM (layer)))
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{
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/* only add layers that are visible and not floating selections
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* to the list
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*/
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reverse_list = g_list_prepend (reverse_list, layer);
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}
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}
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}
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for (list = reverse_list; list; list = g_list_next (list))
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{
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GimpItem *item = list->data;
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PixelRegion projPR;
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gint x1, y1;
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gint x2, y2;
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gint off_x;
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gint off_y;
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gimp_item_get_offset (item, &off_x, &off_y);
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x1 = CLAMP (off_x, x, x + w);
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y1 = CLAMP (off_y, y, y + h);
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x2 = CLAMP (off_x + gimp_item_get_width (item), x, x + w);
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y2 = CLAMP (off_y + gimp_item_get_height (item), y, y + h);
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pixel_region_init (&projPR,
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gimp_pickable_get_tiles (GIMP_PICKABLE (proj)),
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x1, y1, x2 - x1, y2 - y1,
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TRUE);
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gimp_drawable_project_region (GIMP_DRAWABLE (item),
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x1 - off_x, y1 - off_y,
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x2 - x1, y2 - y1,
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&projPR,
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proj->construct_flag);
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proj->construct_flag = TRUE; /* something was projected */
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}
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g_list_free (reverse_list);
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}
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/**
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* gimp_projection_initialize:
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* @proj: A #GimpProjection.
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* @x:
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* @y:
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* @w:
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* @h:
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*
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* This function determines whether a visible layer with combine mode
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* Normal provides complete coverage over the specified area. If not,
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* the projection is initialized to transparent black.
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*/
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static void
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gimp_projection_initialize (GimpProjection *proj,
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gint x,
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gint y,
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gint w,
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gint h)
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{
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GList *list;
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gboolean coverage = FALSE;
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for (list = gimp_projectable_get_layers (proj->projectable);
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list;
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list = g_list_next (list))
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{
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GimpLayer *layer = list->data;
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GimpDrawable *drawable = GIMP_DRAWABLE (layer);
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GimpItem *item = GIMP_ITEM (layer);
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gint off_x, off_y;
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gimp_item_get_offset (item, &off_x, &off_y);
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if (gimp_item_get_visible (item) &&
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! gimp_drawable_has_alpha (drawable) &&
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! gimp_layer_get_mask (layer) &&
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gimp_layer_get_mode (layer) == GIMP_NORMAL_MODE &&
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gimp_layer_get_opacity (layer) == GIMP_OPACITY_OPAQUE &&
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off_x <= x &&
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off_y <= y &&
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(off_x + gimp_item_get_width (item)) >= (x + w) &&
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(off_y + gimp_item_get_height (item)) >= (y + h))
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{
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coverage = TRUE;
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break;
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}
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}
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if (! coverage)
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{
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PixelRegion region;
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pixel_region_init (®ion,
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gimp_pickable_get_tiles (GIMP_PICKABLE (proj)),
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x, y, w, h, TRUE);
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clear_region (®ion);
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}
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}
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