gboolean
gimp_paint_core_start (GimpPaintCore *core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
GError **error)
{
GimpImage *image;
GimpItem *item;
GimpChannel *mask;
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), FALSE);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), FALSE);
g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), FALSE);
g_return_val_if_fail (coords != NULL, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
item = GIMP_ITEM (drawable);
image = gimp_item_get_image (item);
if (core->stroke_buffer)
{
g_array_free (core->stroke_buffer, TRUE);
core->stroke_buffer = NULL;
}
core->stroke_buffer = g_array_sized_new (TRUE, TRUE,
sizeof (GimpCoords),
STROKE_BUFFER_INIT_SIZE);
/* remember the last stroke's endpoint for later undo */
core->start_coords = core->last_coords;
core->cur_coords = *coords;
if (! GIMP_PAINT_CORE_GET_CLASS (core)->start (core, drawable,
paint_options,
coords, error))
{
return FALSE;
}
/* Allocate the undo structure */
if (core->undo_buffer)
g_object_unref (core->undo_buffer);
core->undo_buffer = gegl_buffer_dup (gimp_drawable_get_buffer (drawable));
/* Allocate the saved proj structure */
if (core->saved_proj_buffer)
{
g_object_unref (core->saved_proj_buffer);
core->saved_proj_buffer = NULL;
}
if (core->use_saved_proj)
{
GeglBuffer *buffer = gimp_pickable_get_buffer (GIMP_PICKABLE (image));
core->saved_proj_buffer = gegl_buffer_dup (buffer);
}
/* Allocate the canvas blocks structure */
if (core->canvas_buffer)
g_object_unref (core->canvas_buffer);
core->canvas_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item)),
babl_format ("Y float"));
/* Get the initial undo extents */
core->x1 = core->x2 = core->cur_coords.x;
core->y1 = core->y2 = core->cur_coords.y;
core->last_paint.x = -1e6;
core->last_paint.y = -1e6;
mask = gimp_image_get_mask (image);
/* don't apply the mask to itself and don't apply an empty mask */
if (GIMP_DRAWABLE (mask) != drawable && ! gimp_channel_is_empty (mask))
{
GeglBuffer *mask_buffer;
gint offset_x;
gint offset_y;
mask_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask));
gimp_item_get_offset (item, &offset_x, &offset_y);
core->mask_buffer = g_object_ref (mask_buffer);
core->mask_x_offset = -offset_x;
core->mask_y_offset = -offset_y;
}
else
{
core->mask_buffer = NULL;
}
core->linear_mode = gimp_drawable_get_linear (drawable);
if (paint_options->use_applicator)
{
core->applicator = gimp_applicator_new (NULL, core->linear_mode);
if (core->mask_buffer)
{
gimp_applicator_set_mask_buffer (core->applicator,
core->mask_buffer);
gimp_applicator_set_mask_offset (core->applicator,
core->mask_x_offset,
core->mask_y_offset);
}
gimp_applicator_set_affect (core->applicator,
gimp_drawable_get_active_mask (drawable));
gimp_applicator_set_dest_buffer (core->applicator,
gimp_drawable_get_buffer (drawable));
}
else
{
if (core->comp_buffer)
{
g_object_unref (core->comp_buffer);
core->comp_buffer = NULL;
}
/* Allocate the scratch buffer if there's a component mask */
if (gimp_drawable_get_active_mask (drawable) != GIMP_COMPONENT_ALL)
{
const Babl *format;
if (core->linear_mode)
format = babl_format ("RGBA float");
else
format = babl_format ("R'G'B'A float");
core->comp_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item)),
format);
}
}
/* Freeze the drawable preview so that it isn't constantly updated. */
gimp_viewable_preview_freeze (GIMP_VIEWABLE (drawable));
return TRUE;
}
void
gimp_drawable_real_apply_buffer (GimpDrawable *drawable,
GeglBuffer *buffer,
const GeglRectangle *buffer_region,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
GimpLayerModeEffects mode,
GeglBuffer *base_buffer,
gint base_x,
gint base_y)
{
GimpItem *item = GIMP_ITEM (drawable);
GimpImage *image = gimp_item_get_image (item);
GimpChannel *mask = gimp_image_get_mask (image);
GimpApplicator *applicator;
gint x, y, width, height;
gint offset_x, offset_y;
/* don't apply the mask to itself and don't apply an empty mask */
if (GIMP_DRAWABLE (mask) == drawable || gimp_channel_is_empty (mask))
mask = NULL;
if (! base_buffer)
base_buffer = gimp_drawable_get_buffer (drawable);
/* get the layer offsets */
gimp_item_get_offset (item, &offset_x, &offset_y);
/* make sure the image application coordinates are within drawable bounds */
gimp_rectangle_intersect (base_x, base_y,
buffer_region->width, buffer_region->height,
0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item),
&x, &y, &width, &height);
if (mask)
{
GimpItem *mask_item = GIMP_ITEM (mask);
/* make sure coordinates are in mask bounds ...
* we need to add the layer offset to transform coords
* into the mask coordinate system
*/
gimp_rectangle_intersect (x, y, width, height,
-offset_x, -offset_y,
gimp_item_get_width (mask_item),
gimp_item_get_height (mask_item),
&x, &y, &width, &height);
}
if (push_undo)
{
GimpDrawableUndo *undo;
gimp_drawable_push_undo (drawable, undo_desc,
NULL, x, y, width, height);
undo = GIMP_DRAWABLE_UNDO (gimp_image_undo_get_fadeable (image));
if (undo)
{
undo->paint_mode = mode;
undo->opacity = opacity;
undo->applied_buffer =
gegl_buffer_new (GEGL_RECTANGLE (0, 0, width, height),
gegl_buffer_get_format (buffer));
gegl_buffer_copy (buffer,
GEGL_RECTANGLE (buffer_region->x + (x - base_x),
buffer_region->y + (y - base_y),
width, height),
undo->applied_buffer,
GEGL_RECTANGLE (0, 0, width, height));
}
}
applicator = gimp_applicator_new (NULL, gimp_drawable_get_linear (drawable),
FALSE);
if (mask)
{
GeglBuffer *mask_buffer;
mask_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask));
gimp_applicator_set_mask_buffer (applicator, mask_buffer);
gimp_applicator_set_mask_offset (applicator, -offset_x, -offset_y);
}
gimp_applicator_set_src_buffer (applicator, base_buffer);
gimp_applicator_set_dest_buffer (applicator,
gimp_drawable_get_buffer (drawable));
gimp_applicator_set_apply_buffer (applicator, buffer);
gimp_applicator_set_apply_offset (applicator,
base_x - buffer_region->x,
base_y - buffer_region->y);
gimp_applicator_set_mode (applicator, opacity, mode);
gimp_applicator_set_affect (applicator,
gimp_drawable_get_active_mask (drawable));
gimp_applicator_blit (applicator, GEGL_RECTANGLE (x, y, width, height));
g_object_unref (applicator);
}
