/* LIBGIMP - The GIMP Library * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball * * gimpdrawable.c * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include "config.h" #include "gimp.h" #define TILE_WIDTH gimp_tile_width() #define TILE_HEIGHT gimp_tile_height() /** * gimp_drawable_get: * @drawable_ID: the ID of the drawable * * This function creates a #GimpDrawable structure for the core * drawable identified by @drawable_ID. The returned structure * contains some basic information about the drawable and can also * hold tile data for transfer to and from the core. * * Note that the name of this function is somewhat misleading, because * it suggests that it simply returns a handle. This is not the case: * if the function is called multiple times, it creates separate tile * lists each time, which will usually produce undesired results. * * When a plug-in has finished working with a drawable, before exiting * it should call gimp_drawable_detach() to make sure that all tile data is * transferred back to the core. * * Return value: a new #GimpDrawable wrapper **/ GimpDrawable * gimp_drawable_get (gint32 drawable_ID) { GimpDrawable *drawable; gint width; gint height; gint bpp; width = gimp_drawable_width (drawable_ID); height = gimp_drawable_height (drawable_ID); bpp = gimp_drawable_bpp (drawable_ID); g_return_val_if_fail (width > 0 && height > 0 && bpp > 0, NULL); drawable = g_new0 (GimpDrawable, 1); drawable->drawable_id = drawable_ID; drawable->width = width; drawable->height = height; drawable->bpp = bpp; drawable->ntile_rows = (height + TILE_HEIGHT - 1) / TILE_HEIGHT; drawable->ntile_cols = (width + TILE_WIDTH - 1) / TILE_WIDTH; return drawable; } /** * gimp_drawable_detach: * @drawable: The #GimpDrawable to detach from the core * * This function is called when a plug-in is finished working * with a drawable. It forces all tile data held in the tile * list of the #GimpDrawable to be transferred to the core, and * then frees all associated memory. You must not access the * @drawable after having called gimp_drawable_detach(). **/ void gimp_drawable_detach (GimpDrawable *drawable) { g_return_if_fail (drawable != NULL); gimp_drawable_flush (drawable); if (drawable->tiles) g_free (drawable->tiles); if (drawable->shadow_tiles) g_free (drawable->shadow_tiles); g_free (drawable); } /** * gimp_drawable_flush: * @drawable: The #GimpDrawable whose tile data is to be transferred * to the core. * * This function causes all tile data in the tile list of @drawable to be * transferred to the core. It is usually called in situations where a * plug-in acts on a drawable, and then needs to read the results of its * actions. Data transferred back from the core will not generally be valid * unless gimp_drawable_flush() has been called beforehand. **/ void gimp_drawable_flush (GimpDrawable *drawable) { GimpTile *tiles; gint n_tiles; gint i; g_return_if_fail (drawable != NULL); if (drawable->tiles) { tiles = drawable->tiles; n_tiles = drawable->ntile_rows * drawable->ntile_cols; for (i = 0; i < n_tiles; i++) if ((tiles[i].ref_count > 0) && tiles[i].dirty) gimp_tile_flush (&tiles[i]); } if (drawable->shadow_tiles) { tiles = drawable->shadow_tiles; n_tiles = drawable->ntile_rows * drawable->ntile_cols; for (i = 0; i < n_tiles; i++) if ((tiles[i].ref_count > 0) && tiles[i].dirty) gimp_tile_flush (&tiles[i]); } /* nuke all references to this drawable from the cache */ _gimp_tile_cache_flush_drawable (drawable); } GimpTile * gimp_drawable_get_tile (GimpDrawable *drawable, gboolean shadow, gint row, gint col) { GimpTile *tiles; guint right_tile; guint bottom_tile; gint n_tiles; gint tile_num; gint i, j, k; g_return_val_if_fail (drawable != NULL, NULL); if (shadow) tiles = drawable->shadow_tiles; else tiles = drawable->tiles; if (! tiles) { n_tiles = drawable->ntile_rows * drawable->ntile_cols; tiles = g_new (GimpTile, n_tiles); right_tile = (drawable->width - ((drawable->ntile_cols - 1) * TILE_WIDTH)); bottom_tile = (drawable->height - ((drawable->ntile_rows - 1) * TILE_HEIGHT)); for (i = 0, k = 0; i < drawable->ntile_rows; i++) { for (j = 0; j < drawable->ntile_cols; j++, k++) { tiles[k].bpp = drawable->bpp; tiles[k].tile_num = k; tiles[k].ref_count = 0; tiles[k].dirty = FALSE; tiles[k].shadow = shadow; tiles[k].data = NULL; tiles[k].drawable = drawable; if (j == (drawable->ntile_cols - 1)) tiles[k].ewidth = right_tile; else tiles[k].ewidth = TILE_WIDTH; if (i == (drawable->ntile_rows - 1)) tiles[k].eheight = bottom_tile; else tiles[k].eheight = TILE_HEIGHT; } } if (shadow) drawable->shadow_tiles = tiles; else drawable->tiles = tiles; } tile_num = row * drawable->ntile_cols + col; return &tiles[tile_num]; } GimpTile * gimp_drawable_get_tile2 (GimpDrawable *drawable, gboolean shadow, gint x, gint y) { gint row; gint col; g_return_val_if_fail (drawable != NULL, NULL); col = x / TILE_WIDTH; row = y / TILE_HEIGHT; return gimp_drawable_get_tile (drawable, shadow, row, col); } void gimp_drawable_get_color_uchar (gint32 drawable_ID, const GimpRGB *color, guchar *color_uchar) { g_return_if_fail (color != NULL); g_return_if_fail (color_uchar != NULL); switch (gimp_drawable_type (drawable_ID)) { case GIMP_RGB_IMAGE: gimp_rgb_get_uchar (color, &color_uchar[0], &color_uchar[1], &color_uchar[2]); color_uchar[3] = 255; break; case GIMP_RGBA_IMAGE: gimp_rgba_get_uchar (color, &color_uchar[0], &color_uchar[1], &color_uchar[2], &color_uchar[3]); break; case GIMP_GRAY_IMAGE: color_uchar[0] = gimp_rgb_intensity_uchar (color); color_uchar[1] = 255; break; case GIMP_GRAYA_IMAGE: color_uchar[0] = gimp_rgb_intensity_uchar (color); gimp_rgba_get_uchar (color, NULL, NULL, NULL, &color_uchar[1]); break; default: break; } } guchar * gimp_drawable_get_thumbnail_data (gint32 drawable_ID, gint *width, gint *height, gint *bpp) { gint ret_width; gint ret_height; guchar *image_data; gint data_size; _gimp_drawable_thumbnail (drawable_ID, *width, *height, &ret_width, &ret_height, bpp, &data_size, &image_data); *width = ret_width; *height = ret_height; return image_data; } guchar * gimp_drawable_get_sub_thumbnail_data (gint32 drawable_ID, gint src_x, gint src_y, gint src_width, gint src_height, gint *dest_width, gint *dest_height, gint *bpp) { gint ret_width; gint ret_height; guchar *image_data; gint data_size; _gimp_drawable_sub_thumbnail (drawable_ID, src_x, src_y, src_width, src_height, *dest_width, *dest_height, &ret_width, &ret_height, bpp, &data_size, &image_data); *dest_width = ret_width; *dest_height = ret_height; return image_data; } /** * gimp_drawable_attach_new_parasite: * @drawable_ID: the ID of the #GimpDrawable to attach the #GimpParasite to. * @name: the name of the #GimpParasite to create and attach. * @flags: the flags set on the #GimpParasite. * @size: the size of the parasite data in bytes. * @data: a pointer to the data attached with the #GimpParasite. * * Convenience function that creates a parasite and attaches it * to the GIMP. * * See Also: gimp_drawable_parasite_attach() */ void gimp_drawable_attach_new_parasite (gint32 drawable_ID, const gchar *name, gint flags, gint size, gconstpointer data) { GimpParasite *parasite = gimp_parasite_new (name, flags, size, data); gimp_drawable_parasite_attach (drawable_ID, parasite); gimp_parasite_free (parasite); }