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-rw-r--r--app/display/gimpcanvastransformpreview.c791
1 files changed, 791 insertions, 0 deletions
diff --git a/app/display/gimpcanvastransformpreview.c b/app/display/gimpcanvastransformpreview.c
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+++ b/app/display/gimpcanvastransformpreview.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvastransformpreview.c
+ * Copyright (C) 2011 Michael Natterer <mitch@gimp.org>
+ *
+ * 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 <string.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpmath/gimpmath.h"
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "display/display-types.h"
+
+#include "gegl/gimp-gegl-nodes.h"
+#include "gegl/gimp-gegl-utils.h"
+#include "gegl/gimptilehandlervalidate.h"
+
+#include "core/gimp-transform-resize.h"
+#include "core/gimp-transform-utils.h"
+#include "core/gimp-utils.h"
+#include "core/gimpchannel.h"
+#include "core/gimpimage.h"
+#include "core/gimplayer.h"
+#include "core/gimppickable.h"
+
+#include "gimpcanvas.h"
+#include "gimpcanvastransformpreview.h"
+#include "gimpdisplayshell.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_PICKABLE,
+ PROP_TRANSFORM,
+ PROP_CLIP,
+ PROP_X1,
+ PROP_Y1,
+ PROP_X2,
+ PROP_Y2,
+ PROP_OPACITY
+};
+
+
+typedef struct _GimpCanvasTransformPreviewPrivate GimpCanvasTransformPreviewPrivate;
+
+struct _GimpCanvasTransformPreviewPrivate
+{
+ GimpPickable *pickable;
+ GimpMatrix3 transform;
+ GimpTransformResize clip;
+ gdouble x1, y1;
+ gdouble x2, y2;
+ gdouble opacity;
+
+ GeglNode *node;
+ GeglNode *source_node;
+ GeglNode *convert_format_node;
+ GeglNode *layer_mask_source_node;
+ GeglNode *layer_mask_opacity_node;
+ GeglNode *mask_source_node;
+ GeglNode *mask_translate_node;
+ GeglNode *mask_crop_node;
+ GeglNode *opacity_node;
+ GeglNode *cache_node;
+ GeglNode *transform_node;
+
+ GimpPickable *node_pickable;
+ GimpDrawable *node_layer_mask;
+ GimpDrawable *node_mask;
+ GeglRectangle node_rect;
+ gdouble node_opacity;
+ GimpMatrix3 node_matrix;
+ GeglNode *node_output;
+};
+
+#define GET_PRIVATE(transform_preview) \
+ ((GimpCanvasTransformPreviewPrivate *) gimp_canvas_transform_preview_get_instance_private ((GimpCanvasTransformPreview *) (transform_preview)))
+
+
+/* local function prototypes */
+
+static void gimp_canvas_transform_preview_dispose (GObject *object);
+static void gimp_canvas_transform_preview_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_transform_preview_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static void gimp_canvas_transform_preview_draw (GimpCanvasItem *item,
+ cairo_t *cr);
+static cairo_region_t * gimp_canvas_transform_preview_get_extents (GimpCanvasItem *item);
+
+static void gimp_canvas_transform_preview_layer_changed (GimpLayer *layer,
+ GimpCanvasTransformPreview *transform_preview);
+
+static void gimp_canvas_transform_preview_set_pickable (GimpCanvasTransformPreview *transform_preview,
+ GimpPickable *pickable);
+static void gimp_canvas_transform_preview_sync_node (GimpCanvasTransformPreview *transform_preview);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasTransformPreview,
+ gimp_canvas_transform_preview,
+ GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_transform_preview_parent_class
+
+
+/* private functions */
+
+
+static void
+gimp_canvas_transform_preview_class_init (GimpCanvasTransformPreviewClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
+
+ object_class->dispose = gimp_canvas_transform_preview_dispose;
+ object_class->set_property = gimp_canvas_transform_preview_set_property;
+ object_class->get_property = gimp_canvas_transform_preview_get_property;
+
+ item_class->draw = gimp_canvas_transform_preview_draw;
+ item_class->get_extents = gimp_canvas_transform_preview_get_extents;
+
+ g_object_class_install_property (object_class, PROP_PICKABLE,
+ g_param_spec_object ("pickable",
+ NULL, NULL,
+ GIMP_TYPE_PICKABLE,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_TRANSFORM,
+ gimp_param_spec_matrix3 ("transform",
+ NULL, NULL,
+ NULL,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_CLIP,
+ g_param_spec_enum ("clip",
+ NULL, NULL,
+ GIMP_TYPE_TRANSFORM_RESIZE,
+ GIMP_TRANSFORM_RESIZE_ADJUST,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_X1,
+ g_param_spec_double ("x1",
+ NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE,
+ 0.0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_Y1,
+ g_param_spec_double ("y1",
+ NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE,
+ 0.0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_X2,
+ g_param_spec_double ("x2",
+ NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE,
+ 0.0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_Y2,
+ g_param_spec_double ("y2",
+ NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE,
+ 0.0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_OPACITY,
+ g_param_spec_double ("opacity",
+ NULL, NULL,
+ 0.0, 1.0, 1.0,
+ GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_transform_preview_init (GimpCanvasTransformPreview *transform_preview)
+{
+ GimpCanvasTransformPreviewPrivate *private = GET_PRIVATE (transform_preview);
+
+ private->clip = GIMP_TRANSFORM_RESIZE_ADJUST;
+ private->opacity = 1.0;
+}
+
+static void
+gimp_canvas_transform_preview_dispose (GObject *object)
+{
+ GimpCanvasTransformPreview *transform_preview = GIMP_CANVAS_TRANSFORM_PREVIEW (object);
+ GimpCanvasTransformPreviewPrivate *private = GET_PRIVATE (object);
+
+ g_clear_object (&private->node);
+
+ gimp_canvas_transform_preview_set_pickable (transform_preview, NULL);
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gimp_canvas_transform_preview_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasTransformPreview *transform_preview = GIMP_CANVAS_TRANSFORM_PREVIEW (object);
+ GimpCanvasTransformPreviewPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_PICKABLE:
+ gimp_canvas_transform_preview_set_pickable (transform_preview,
+ g_value_get_object (value));
+ break;
+
+ case PROP_TRANSFORM:
+ {
+ GimpMatrix3 *transform = g_value_get_boxed (value);
+
+ if (transform)
+ private->transform = *transform;
+ else
+ gimp_matrix3_identity (&private->transform);
+ }
+ break;
+
+ case PROP_CLIP:
+ private->clip = g_value_get_enum (value);
+ break;
+
+ case PROP_X1:
+ private->x1 = g_value_get_double (value);
+ break;
+
+ case PROP_Y1:
+ private->y1 = g_value_get_double (value);
+ break;
+
+ case PROP_X2:
+ private->x2 = g_value_get_double (value);
+ break;
+
+ case PROP_Y2:
+ private->y2 = g_value_get_double (value);
+ break;
+
+ case PROP_OPACITY:
+ private->opacity = g_value_get_double (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_transform_preview_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasTransformPreviewPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_PICKABLE:
+ g_value_set_object (value, private->pickable);
+ break;
+
+ case PROP_TRANSFORM:
+ g_value_set_boxed (value, &private->transform);
+ break;
+
+ case PROP_CLIP:
+ g_value_set_enum (value, private->clip);
+ break;
+
+ case PROP_X1:
+ g_value_set_double (value, private->x1);
+ break;
+
+ case PROP_Y1:
+ g_value_set_double (value, private->y1);
+ break;
+
+ case PROP_X2:
+ g_value_set_double (value, private->x2);
+ break;
+
+ case PROP_Y2:
+ g_value_set_double (value, private->y2);
+ break;
+
+ case PROP_OPACITY:
+ g_value_set_double (value, private->opacity);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static gboolean
+gimp_canvas_transform_preview_transform (GimpCanvasItem *item,
+ cairo_rectangle_int_t *extents)
+{
+ GimpCanvasTransformPreviewPrivate *private = GET_PRIVATE (item);
+ gint x1, y1;
+ gint x2, y2;
+ gdouble tx1, ty1;
+ gdouble tx2, ty2;
+
+ if (! gimp_transform_resize_boundary (&private->transform,
+ private->clip,
+ private->x1, private->y1,
+ private->x2, private->y2,
+ &x1, &y1,
+ &x2, &y2))
+ {
+ return FALSE;
+ }
+
+ gimp_canvas_item_transform_xy_f (item, x1, y1, &tx1, &ty1);
+ gimp_canvas_item_transform_xy_f (item, x2, y2, &tx2, &ty2);
+
+ extents->x = (gint) floor (tx1);
+ extents->y = (gint) floor (ty1);
+ extents->width = (gint) ceil (tx2) - extents->x;
+ extents->height = (gint) ceil (ty2) - extents->y;
+
+ return TRUE;
+}
+
+static void
+gimp_canvas_transform_preview_draw (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasTransformPreview *transform_preview = GIMP_CANVAS_TRANSFORM_PREVIEW (item);
+ GimpCanvasTransformPreviewPrivate *private = GET_PRIVATE (item);
+ GimpDisplayShell *shell = gimp_canvas_item_get_shell (item);
+ cairo_rectangle_int_t extents;
+ gdouble clip_x1, clip_y1;
+ gdouble clip_x2, clip_y2;
+ GeglRectangle bounds;
+ cairo_surface_t *surface;
+ guchar *surface_data;
+ gint surface_stride;
+
+ if (! gimp_canvas_transform_preview_transform (item, &extents))
+ return;
+
+ cairo_clip_extents (cr, &clip_x1, &clip_y1, &clip_x2, &clip_y2);
+
+ clip_x1 = floor (clip_x1);
+ clip_y1 = floor (clip_y1);
+ clip_x2 = ceil (clip_x2);
+ clip_y2 = ceil (clip_y2);
+
+ if (! gegl_rectangle_intersect (&bounds,
+ GEGL_RECTANGLE (extents.x,
+ extents.y,
+ extents.width,
+ extents.height),
+ GEGL_RECTANGLE (clip_x1,
+ clip_y1,
+ clip_x2 - clip_x1,
+ clip_y2 - clip_y1)))
+ {
+ return;
+ }
+
+ surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
+ bounds.width, bounds.height);
+
+ g_return_if_fail (surface != NULL);
+
+ surface_data = cairo_image_surface_get_data (surface);
+ surface_stride = cairo_image_surface_get_stride (surface);
+
+ gimp_canvas_transform_preview_sync_node (transform_preview);
+
+ gegl_node_blit (private->node_output, 1.0,
+ GEGL_RECTANGLE (bounds.x + shell->offset_x,
+ bounds.y + shell->offset_y,
+ bounds.width,
+ bounds.height),
+ babl_format ("cairo-ARGB32"), surface_data, surface_stride,
+ GEGL_BLIT_CACHE);
+
+ cairo_surface_mark_dirty (surface);
+
+ cairo_set_source_surface (cr, surface, bounds.x, bounds.y);
+ cairo_rectangle (cr, bounds.x, bounds.y, bounds.width, bounds.height);
+ cairo_fill (cr);
+
+ cairo_surface_destroy (surface);
+}
+
+static cairo_region_t *
+gimp_canvas_transform_preview_get_extents (GimpCanvasItem *item)
+{
+ cairo_rectangle_int_t rectangle;
+
+ if (gimp_canvas_transform_preview_transform (item, &rectangle))
+ return cairo_region_create_rectangle (&rectangle);
+
+ return NULL;
+}
+
+static void
+gimp_canvas_transform_preview_layer_changed (GimpLayer *layer,
+ GimpCanvasTransformPreview *transform_preview)
+{
+ GimpCanvasItem *item = GIMP_CANVAS_ITEM (transform_preview);
+
+ gimp_canvas_item_begin_change (item);
+ gimp_canvas_item_end_change (item);
+}
+
+static void
+gimp_canvas_transform_preview_set_pickable (GimpCanvasTransformPreview *transform_preview,
+ GimpPickable *pickable)
+{
+ GimpCanvasTransformPreviewPrivate *private = GET_PRIVATE (transform_preview);
+
+ if (private->pickable && GIMP_IS_LAYER (private->pickable))
+ {
+ g_signal_handlers_disconnect_by_func (
+ private->pickable,
+ gimp_canvas_transform_preview_layer_changed,
+ transform_preview);
+ }
+
+ g_set_object (&private->pickable, pickable);
+
+ if (pickable && GIMP_IS_LAYER (pickable))
+ {
+ g_signal_connect (pickable, "opacity-changed",
+ G_CALLBACK (gimp_canvas_transform_preview_layer_changed),
+ transform_preview);
+ g_signal_connect (pickable, "mask-changed",
+ G_CALLBACK (gimp_canvas_transform_preview_layer_changed),
+ transform_preview);
+ g_signal_connect (pickable, "apply-mask-changed",
+ G_CALLBACK (gimp_canvas_transform_preview_layer_changed),
+ transform_preview);
+ g_signal_connect (pickable, "show-mask-changed",
+ G_CALLBACK (gimp_canvas_transform_preview_layer_changed),
+ transform_preview);
+ }
+}
+
+static void
+gimp_canvas_transform_preview_sync_node (GimpCanvasTransformPreview *transform_preview)
+{
+ GimpCanvasTransformPreviewPrivate *private = GET_PRIVATE (transform_preview);
+ GimpCanvasItem *item = GIMP_CANVAS_ITEM (transform_preview);
+ GimpDisplayShell *shell = gimp_canvas_item_get_shell (item);
+ GimpImage *image = gimp_canvas_item_get_image (item);
+ GimpPickable *pickable = private->pickable;
+ GimpDrawable *layer_mask = NULL;
+ GimpDrawable *mask = NULL;
+ gdouble opacity = private->opacity;
+ gint offset_x = 0;
+ gint offset_y = 0;
+ GimpMatrix3 matrix;
+
+ if (! private->node)
+ {
+ private->node = gegl_node_new ();
+
+ private->source_node =
+ gegl_node_new_child (private->node,
+ "operation", "gimp:buffer-source-validate",
+ NULL);
+
+ private->convert_format_node =
+ gegl_node_new_child (private->node,
+ "operation", "gegl:convert-format",
+ NULL);
+
+ private->layer_mask_source_node =
+ gegl_node_new_child (private->node,
+ "operation", "gimp:buffer-source-validate",
+ NULL);
+
+ private->layer_mask_opacity_node =
+ gegl_node_new_child (private->node,
+ "operation", "gegl:opacity",
+ NULL);
+
+ private->mask_source_node =
+ gegl_node_new_child (private->node,
+ "operation", "gimp:buffer-source-validate",
+ NULL);
+
+ private->mask_translate_node =
+ gegl_node_new_child (private->node,
+ "operation", "gegl:translate",
+ NULL);
+
+ private->mask_crop_node =
+ gegl_node_new_child (private->node,
+ "operation", "gegl:crop",
+ "width", 0.0,
+ "height", 0.0,
+ NULL);
+
+ private->opacity_node =
+ gegl_node_new_child (private->node,
+ "operation", "gegl:opacity",
+ NULL);
+
+ private->cache_node =
+ gegl_node_new_child (private->node,
+ "operation", "gegl:cache",
+ NULL);
+
+ private->transform_node =
+ gegl_node_new_child (private->node,
+ "operation", "gegl:transform",
+ "near-z", GIMP_TRANSFORM_NEAR_Z,
+ "sampler", GIMP_INTERPOLATION_NONE,
+ NULL);
+
+ gegl_node_link_many (private->source_node,
+ private->convert_format_node,
+ private->transform_node,
+ NULL);
+
+ gegl_node_connect_to (private->layer_mask_source_node, "output",
+ private->layer_mask_opacity_node, "aux");
+
+ gegl_node_link_many (private->mask_source_node,
+ private->mask_translate_node,
+ private->mask_crop_node,
+ NULL);
+
+ private->node_pickable = NULL;
+ private->node_layer_mask = NULL;
+ private->node_mask = NULL;
+ private->node_rect = *GEGL_RECTANGLE (0, 0, 0, 0);
+ private->node_opacity = 1.0;
+ gimp_matrix3_identity (&private->node_matrix);
+ private->node_output = private->transform_node;
+ }
+
+ if (GIMP_IS_ITEM (pickable))
+ {
+ gimp_item_get_offset (GIMP_ITEM (private->pickable),
+ &offset_x, &offset_y);
+
+ if (gimp_item_mask_bounds (GIMP_ITEM (pickable),
+ NULL, NULL, NULL, NULL))
+ {
+ mask = GIMP_DRAWABLE (gimp_image_get_mask (image));
+ }
+
+ if (GIMP_IS_LAYER (pickable))
+ {
+ GimpLayer *layer = GIMP_LAYER (pickable);
+
+ opacity *= gimp_layer_get_opacity (layer);
+
+ layer_mask = GIMP_DRAWABLE (gimp_layer_get_mask (layer));
+
+ if (layer_mask)
+ {
+ if (gimp_layer_get_show_mask (layer) && ! mask)
+ {
+ pickable = GIMP_PICKABLE (layer_mask);
+ layer_mask = NULL;
+ }
+ else if (! gimp_layer_get_apply_mask (layer))
+ {
+ layer_mask = NULL;
+ }
+ }
+ }
+ }
+
+ gimp_matrix3_identity (&matrix);
+ gimp_matrix3_translate (&matrix, offset_x, offset_y);
+ gimp_matrix3_mult (&private->transform, &matrix);
+ gimp_matrix3_scale (&matrix, shell->scale_x, shell->scale_y);
+
+ if (pickable != private->node_pickable)
+ {
+ GeglBuffer *buffer;
+
+ gimp_pickable_flush (pickable);
+
+ buffer = gimp_pickable_get_buffer (pickable);
+
+ if (gimp_tile_handler_validate_get_assigned (buffer))
+ buffer = gimp_gegl_buffer_dup (buffer);
+ else
+ buffer = g_object_ref (buffer);
+
+ gegl_node_set (private->source_node,
+ "buffer", buffer,
+ NULL);
+ gegl_node_set (private->convert_format_node,
+ "format", gimp_pickable_get_format_with_alpha (pickable),
+ NULL);
+
+ g_object_unref (buffer);
+ }
+
+ if (layer_mask != private->node_layer_mask)
+ {
+ gegl_node_set (private->layer_mask_source_node,
+ "buffer", layer_mask ?
+ gimp_drawable_get_buffer (layer_mask) :
+ NULL,
+ NULL);
+ }
+
+ if (mask)
+ {
+ GeglRectangle rect;
+
+ rect.x = offset_x;
+ rect.y = offset_y;
+ rect.width = gimp_item_get_width (GIMP_ITEM (private->pickable));
+ rect.height = gimp_item_get_height (GIMP_ITEM (private->pickable));
+
+ if (mask != private->node_mask)
+ {
+ gegl_node_set (private->mask_source_node,
+ "buffer", gimp_drawable_get_buffer (mask),
+ NULL);
+ }
+
+ if (! gegl_rectangle_equal (&rect, &private->node_rect))
+ {
+ private->node_rect = rect;
+
+ gegl_node_set (private->mask_translate_node,
+ "x", (gdouble) -rect.x,
+ "y", (gdouble) -rect.y,
+ NULL);
+
+ gegl_node_set (private->mask_crop_node,
+ "width", (gdouble) rect.width,
+ "height", (gdouble) rect.height,
+ NULL);
+ }
+
+ if (! private->node_mask)
+ {
+ gegl_node_connect_to (private->mask_crop_node, "output",
+ private->opacity_node, "aux");
+ }
+ }
+ else if (private->node_mask)
+ {
+ gegl_node_disconnect (private->opacity_node, "aux");
+ }
+
+ if (opacity != private->node_opacity)
+ {
+ gegl_node_set (private->opacity_node,
+ "value", opacity,
+ NULL);
+ }
+
+ if (layer_mask != private->node_layer_mask ||
+ mask != private->node_mask ||
+ (opacity != 1.0) != (private->node_opacity != 1.0))
+ {
+ GeglNode *output = private->source_node;
+
+ if (layer_mask && ! mask)
+ {
+ gegl_node_link (output, private->layer_mask_opacity_node);
+ output = private->layer_mask_opacity_node;
+ }
+ else
+ {
+ gegl_node_disconnect (private->layer_mask_opacity_node, "input");
+ }
+
+ if (mask || (opacity != 1.0))
+ {
+ gegl_node_link (output, private->opacity_node);
+ output = private->opacity_node;
+ }
+ else
+ {
+ gegl_node_disconnect (private->opacity_node, "input");
+ }
+
+ if (output == private->source_node)
+ {
+ gegl_node_disconnect (private->cache_node, "input");
+
+ gegl_node_link (output, private->convert_format_node);
+ output = private->convert_format_node;
+ }
+ else
+ {
+ gegl_node_disconnect (private->convert_format_node, "input");
+
+ gegl_node_link (output, private->cache_node);
+ output = private->cache_node;
+ }
+
+ gegl_node_link (output, private->transform_node);
+ output = private->transform_node;
+
+ if (layer_mask && mask)
+ {
+ gegl_node_link (output, private->layer_mask_opacity_node);
+ output = private->layer_mask_opacity_node;
+ }
+
+ private->node_output = output;
+ }
+
+ if (memcmp (&matrix, &private->node_matrix, sizeof (matrix)))
+ {
+ private->node_matrix = matrix;
+
+ gimp_gegl_node_set_matrix (private->transform_node, &matrix);
+ }
+
+ private->node_pickable = pickable;
+ private->node_layer_mask = layer_mask;
+ private->node_mask = mask;
+ private->node_opacity = opacity;
+}
+
+
+/* public functions */
+
+
+GimpCanvasItem *
+gimp_canvas_transform_preview_new (GimpDisplayShell *shell,
+ GimpPickable *pickable,
+ const GimpMatrix3 *transform,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2)
+{
+ g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+ g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL);
+ g_return_val_if_fail (transform != NULL, NULL);
+
+ return g_object_new (GIMP_TYPE_CANVAS_TRANSFORM_PREVIEW,
+ "shell", shell,
+ "pickable", pickable,
+ "transform", transform,
+ "x1", x1,
+ "y1", y1,
+ "x2", x2,
+ "y2", y2,
+ NULL);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 22:28:12 +0000