/* The GIMP -- an 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 2 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, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include "appenv.h" #include "by_color_select.h" #include "channel.h" #include "channels_dialog.h" #include "drawable.h" #include "errors.h" #include "floating_sel.h" #include "gdisplay.h" #include "gdisplay_ops.h" #include "gimage_mask.h" #include "gimprc.h" #include "indexed_palette.h" #include "layer.h" #include "linked.h" #include "paint_core.h" #include "paint_funcs.h" #include "tools.h" #include "transform_core.h" #include "undo.h" typedef int (* UndoPopFunc) (GImage *, int, int, void *); typedef void (* UndoFreeFunc) (int, void *); typedef struct _undo Undo; struct _undo { int type; /* undo type */ void * data; /* data to implement the undo */ long bytes; /* size of undo item */ UndoPopFunc pop_func; /* function pointer to undo pop proc */ UndoFreeFunc free_func; /* function with specifics for freeing */ }; /* Pop functions */ int undo_pop_image (GImage *, int, int, void *); int undo_pop_mask (GImage *, int, int, void *); int undo_pop_layer_displace (GImage *, int, int, void *); int undo_pop_transform (GImage *, int, int, void *); int undo_pop_paint (GImage *, int, int, void *); int undo_pop_layer (GImage *, int, int, void *); int undo_pop_layer_mod (GImage *, int, int, void *); int undo_pop_layer_mask (GImage *, int, int, void *); int undo_pop_channel (GImage *, int, int, void *); int undo_pop_channel_mod (GImage *, int, int, void *); int undo_pop_fs_to_layer (GImage *, int, int, void *); int undo_pop_fs_rigor (GImage *, int, int, void *); int undo_pop_fs_relax (GImage *, int, int, void *); int undo_pop_gimage_mod (GImage *, int, int, void *); int undo_pop_guide (GImage *, int, int, void *); /* Free functions */ void undo_free_image (int, void *); void undo_free_mask (int, void *); void undo_free_layer_displace (int, void *); void undo_free_transform (int, void *); void undo_free_paint (int, void *); void undo_free_layer (int, void *); void undo_free_layer_mod (int, void *); void undo_free_layer_mask (int, void *); void undo_free_channel (int, void *); void undo_free_channel_mod (int, void *); void undo_free_fs_to_layer (int, void *); void undo_free_fs_rigor (int, void *); void undo_free_fs_relax (int, void *); void undo_free_gimage_mod (int, void *); void undo_free_guide (int, void *); /* Sizing functions */ static int layer_size (Layer *); static int channel_size (Channel *); static int group_count = 0; static int shrink_wrap = FALSE; #define UNDO 0 #define REDO 1 static int layer_size (Layer *layer) { int size; size = sizeof (Layer) + layer->width * layer->height * layer->bytes + strlen (layer->name); if (layer_mask (layer)) size += channel_size (layer_mask (layer)); return size; } static int channel_size (Channel *channel) { int size; size = sizeof (Channel) + channel->width * channel->height + strlen (channel->name); return size; } static void undo_free_list (GImage *gimage, int state, link_ptr list) { link_ptr orig; Undo * undo; orig = list; while (list) { undo = (Undo *) list->data; if (undo) { (* undo->free_func) (state, undo->data); gimage->undo_bytes -= undo->bytes; g_free (undo); } list = next_item (list); } free_list (orig); } static link_ptr remove_stack_bottom (GImage *gimage) { link_ptr list, last; int in_group = 0; list = gimage->undo_stack; last = NULL; while (list) { if (list->next == NULL) { if (last) undo_free_list (gimage, UNDO, last->next); else undo_free_list (gimage, UNDO, list); gimage->undo_levels --; if (last) last->next = NULL; list = NULL; } else { if (list->data == NULL) in_group = (in_group) ? 0 : 1; /* Make sure last points to only a single item, or the * tail of an aggregate undo item */ if ((list->data && !in_group) || (!list->data && !in_group)) last = list; list = next_item (list); } } if (last) return gimage->undo_stack; else return NULL; } static int undo_free_up_space (GImage *gimage) { /* If there are 0 levels of undo return FALSE. */ if (levels_of_undo == 0) return FALSE; /* Delete the item on the bottom of the stack if we have the maximum * levels of undo already */ while (gimage->undo_levels >= levels_of_undo) gimage->undo_stack = remove_stack_bottom (gimage); return TRUE; } static Undo * undo_push (GImage *gimage, long size, int type) { Undo * new; if (! gimage->undo_on) return NULL; size += sizeof (Undo); if (gimage->redo_stack) { undo_free_list (gimage, REDO, gimage->redo_stack); gimage->redo_stack = NULL; } if (!gimage->pushing_undo_group) if (! undo_free_up_space (gimage)) return NULL; new = (Undo *) g_malloc (sizeof (Undo)); new->bytes = size; gimage->undo_bytes += size; if (!gimage->pushing_undo_group) /* only increment levels if not in a group */ { new->type = type; gimage->undo_levels ++; } else new->type = gimage->pushing_undo_group; gimage->undo_stack = add_to_list (gimage->undo_stack, (void *) new); return new; } static int pop_stack (GImage *gimage, link_ptr *stack_ptr, link_ptr *unstack_ptr, int state) { Undo * object; link_ptr stack; link_ptr tmp; int status = 0; int in_group = 0; /* Keep popping until we pop a valid object * or get to the end of a group if we're in one */ while (*stack_ptr) { stack = *stack_ptr; object = (Undo *) stack->data; if (object == NULL) { in_group = (in_group) ? 0 : 1; if (in_group) gimage->undo_levels += (state == UNDO) ? -1 : 1; if (status && !in_group) status = 1; else status = 0; } else { status = (* object->pop_func) (gimage, state, object->type, object->data); if (!in_group) gimage->undo_levels += (state == UNDO) ? -1 : 1; } *unstack_ptr = add_to_list (*unstack_ptr, (void *) object); tmp = stack; *stack_ptr = next_item (*stack_ptr); tmp->next = NULL; free_list (tmp); if (status && !in_group) { /* Flush any image updates and displays */ gdisplays_flush (); /* If the shrink_wrap flag was set */ if (shrink_wrap) { gdisplays_shrink_wrap (gimage->ID); shrink_wrap = FALSE; } return TRUE; } } return FALSE; } int undo_pop (GImage *gimage) { return pop_stack (gimage, &gimage->undo_stack, &gimage->redo_stack, UNDO); } int undo_redo (GImage *gimage) { return pop_stack (gimage, &gimage->redo_stack, &gimage->undo_stack, REDO); } void undo_free (GImage *gimage) { undo_free_list (gimage, UNDO, gimage->undo_stack); undo_free_list (gimage, REDO, gimage->redo_stack); gimage->undo_stack = NULL; gimage->redo_stack = NULL; gimage->undo_bytes = 0; gimage->undo_levels = 0; } /**********************/ /* group Undo funcs */ int undo_push_group_start (GImage *gimage, int type) { if (! gimage->undo_on) return FALSE; group_count ++; /* If we're already in a group...ignore */ if (group_count > 1) return TRUE; if (gimage->redo_stack) { undo_free_list (gimage, REDO, gimage->redo_stack); gimage->redo_stack = NULL; } if (! undo_free_up_space (gimage)) return FALSE; gimage->pushing_undo_group = type; gimage->undo_stack = add_to_list (gimage->undo_stack, NULL); gimage->undo_levels++; return TRUE; } int undo_push_group_end (GImage *gimage) { if (! gimage->undo_on) return FALSE; group_count --; if (group_count == 0) { gimage->pushing_undo_group = 0; gimage->undo_stack = add_to_list (gimage->undo_stack, NULL); } return TRUE; } /*********************************/ /* Image Undo functions */ typedef struct _image_undo ImageUndo; struct _image_undo { TileManager *tiles; int drawable; int x1, y1, x2, y2; int sparse; }; int undo_push_image (GImage *gimage, int drawable_ID, int x1, int y1, int x2, int y2) { long size; Undo *new; ImageUndo *image_undo; TileManager *tiles; PixelRegion srcPR, destPR; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); drawable_dirty (drawable_ID); x1 = BOUNDS (x1, 0, drawable_width (drawable_ID)); y1 = BOUNDS (y1, 0, drawable_height (drawable_ID)); x2 = BOUNDS (x2, 0, drawable_width (drawable_ID)); y2 = BOUNDS (y2, 0, drawable_height (drawable_ID)); size = (x2 - x1) * (y2 - y1) * drawable_bytes (drawable_ID) + sizeof (void *) * 2; if ((new = undo_push (gimage, size, IMAGE_UNDO))) { image_undo = (ImageUndo *) g_malloc (sizeof (ImageUndo)); /* If we cannot create a new temp buf--either because our parameters are * degenerate or something else failed, simply return an unsuccessful push. */ tiles = tile_manager_new ((x2 - x1), (y2 - y1), drawable_bytes (drawable_ID)); pixel_region_init (&srcPR, drawable_data (drawable_ID), x1, y1, (x2 - x1), (y2 - y1), FALSE); pixel_region_init (&destPR, tiles, 0, 0, (x2 - x1), (y2 - y1), TRUE); copy_region (&srcPR, &destPR); /* set the image undo structure */ image_undo->tiles = tiles; image_undo->drawable = drawable_ID; image_undo->x1 = x1; image_undo->y1 = y1; image_undo->x2 = x2; image_undo->y2 = y2; image_undo->sparse = FALSE; new->data = image_undo; new->pop_func = undo_pop_image; new->free_func = undo_free_image; return TRUE; } else return FALSE; } int undo_push_image_mod (GImage *gimage, int drawable_ID, int x1, int y1, int x2, int y2, void *tiles_ptr, int sparse) { long size; Undo * new; ImageUndo *image_undo; TileManager *tiles; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); drawable_dirty (drawable_ID); if (! tiles_ptr) return FALSE; x1 = BOUNDS (x1, 0, drawable_width (drawable_ID)); y1 = BOUNDS (y1, 0, drawable_height (drawable_ID)); x2 = BOUNDS (x2, 0, drawable_width (drawable_ID)); y2 = BOUNDS (y2, 0, drawable_height (drawable_ID)); tiles = (TileManager *) tiles_ptr; size = tiles->levels[0].width * tiles->levels[0].height * tiles->levels[0].bpp + sizeof (void *) * 2; if ((new = undo_push (gimage, size, IMAGE_MOD_UNDO))) { image_undo = (ImageUndo *) g_malloc (sizeof (ImageUndo)); image_undo->tiles = tiles; image_undo->drawable = drawable_ID; image_undo->x1 = x1; image_undo->y1 = y1; image_undo->x2 = x2; image_undo->y2 = y2; image_undo->sparse = sparse; new->data = image_undo; new->pop_func = undo_pop_image; new->free_func = undo_free_image; return TRUE; } else { tile_manager_destroy (tiles); return FALSE; } } int undo_pop_image (GImage *gimage, int state, int type, void *image_undo_ptr) { ImageUndo *image_undo; TileManager *tiles; PixelRegion PR1, PR2; int x, y; int w, h; image_undo = (ImageUndo *) image_undo_ptr; tiles = image_undo->tiles; switch (state) { case UNDO: gimage_clean (gimage); drawable_clean (image_undo->drawable); break; case REDO: gimage_dirty (gimage); drawable_dirty (image_undo->drawable); break; } /* some useful values */ x = image_undo->x1; y = image_undo->y1; if (image_undo->sparse == FALSE) { w = tiles->levels[0].width; h = tiles->levels[0].height; pixel_region_init (&PR1, tiles, 0, 0, w, h, TRUE); pixel_region_init (&PR2, drawable_data (image_undo->drawable), x, y, w, h, TRUE); /* swap the regions */ swap_region (&PR1, &PR2); } else { int i, j; Tile *src_tile; Tile *dest_tile; w = image_undo->x2 - image_undo->x1; h = image_undo->y2 - image_undo->y1; for (i = y; i < image_undo->y2; i += (TILE_HEIGHT - (i % TILE_HEIGHT))) { for (j = x; j < image_undo->x2; j += (TILE_WIDTH - (j % TILE_WIDTH))) { src_tile = tile_manager_get_tile (tiles, j, i, 0); if (src_tile->valid == TRUE) { dest_tile = tile_manager_get_tile (drawable_data (image_undo->drawable), j, i, 0); tile_ref (src_tile); tile_ref (dest_tile); swap_pixels (src_tile->data, dest_tile->data, (src_tile->ewidth * src_tile->eheight * src_tile->bpp)); tile_unref (src_tile, TRUE); tile_unref (dest_tile, TRUE); } } } } drawable_update (image_undo->drawable, x, y, w, h); return TRUE; } void undo_free_image (int state, void *image_undo_ptr) { ImageUndo *image_undo; image_undo = (ImageUndo *) image_undo_ptr; tile_manager_destroy (image_undo->tiles); g_free (image_undo); } /******************************/ /* Mask Undo functions */ int undo_push_mask (GImage *gimage, void *mask_ptr) { Undo *new; MaskUndo *mask_undo; int size; mask_undo = (MaskUndo *) mask_ptr; if (mask_undo->tiles) size = mask_undo->tiles->levels[0].width * mask_undo->tiles->levels[0].height; else size = 0; if ((new = undo_push (gimage, size, MASK_UNDO))) { new->data = mask_undo; new->pop_func = undo_pop_mask; new->free_func = undo_free_mask; return TRUE; } else { if (mask_undo->tiles) tile_manager_destroy (mask_undo->tiles); g_free (mask_undo); return FALSE; } } int undo_pop_mask (GImage *gimage, int state, int type, void *mask_ptr) { MaskUndo *mask_undo; TileManager *new_tiles; Channel *sel_mask; PixelRegion srcPR, destPR; int selection; int x1, y1, x2, y2; int width, height; unsigned char empty = 0; width = height = 0; mask_undo = (MaskUndo *) mask_ptr; /* save current selection mask */ sel_mask = gimage_get_mask (gimage); selection = channel_bounds (sel_mask, &x1, &y1, &x2, &y2); pixel_region_init (&srcPR, sel_mask->tiles, x1, y1, (x2 - x1), (y2 - y1), FALSE); if (selection) { new_tiles = tile_manager_new (srcPR.w, srcPR.h, 1); pixel_region_init (&destPR, new_tiles, 0, 0, srcPR.w, srcPR.h, TRUE); copy_region (&srcPR, &destPR); pixel_region_init (&srcPR, sel_mask->tiles, x1, y1, (x2 - x1), (y2 - y1), TRUE); color_region (&srcPR, &empty); } else new_tiles = NULL; if (mask_undo->tiles) { width = mask_undo->tiles->levels[0].width; height = mask_undo->tiles->levels[0].height; pixel_region_init (&srcPR, mask_undo->tiles, 0, 0, width, height, FALSE); pixel_region_init (&destPR, sel_mask->tiles, mask_undo->x, mask_undo->y, width, height, TRUE); copy_region (&srcPR, &destPR); tile_manager_destroy (mask_undo->tiles); } /* invalidate the current bounds and boundary of the mask */ gimage_mask_invalidate (gimage); if (mask_undo->tiles) { sel_mask->empty = FALSE; sel_mask->x1 = mask_undo->x; sel_mask->y1 = mask_undo->y; sel_mask->x2 = mask_undo->x + width; sel_mask->y2 = mask_undo->y + height; } else { sel_mask->empty = TRUE; sel_mask->x1 = 0; sel_mask->y1 = 0; sel_mask->x2 = sel_mask->width; sel_mask->y2 = sel_mask->height; } /* set the new mask undo parameters */ mask_undo->tiles = new_tiles; mask_undo->x = x1; mask_undo->y = y1; /* we know the bounds */ sel_mask->bounds_known = TRUE; /* if there is a "by color" selection dialog active * for this gimage's mask, send it an update notice */ if (gimage->by_color_select) by_color_select_initialize ((void *) gimage); return TRUE; } void undo_free_mask (int state, void *mask_ptr) { MaskUndo *mask_undo; mask_undo = (MaskUndo *) mask_ptr; if (mask_undo->tiles) tile_manager_destroy (mask_undo->tiles); g_free (mask_undo); } /***************************************/ /* Layer displacement Undo functions */ int undo_push_layer_displace (GImage *gimage, int layer_ID) { Undo * new; Layer * layer; int * info; layer = layer_get_ID (layer_ID); if ((new = undo_push (gimage, 12, LAYER_DISPLACE_UNDO))) { new->data = (void *) g_malloc (sizeof (int) * 3); new->pop_func = undo_pop_layer_displace; new->free_func = undo_free_layer_displace; info = (int *) new->data; info[0] = layer_ID; info[1] = layer->offset_x; info[2] = layer->offset_y; return TRUE; } else return FALSE; } int undo_pop_layer_displace (GImage *gimage, int state, int type, void *info_ptr) { Layer * layer; int old_offsets[2]; int *info; info = (int *) info_ptr; layer = layer_get_ID (info[0]); if (layer) { old_offsets[0] = layer->offset_x; old_offsets[1] = layer->offset_y; drawable_update (layer->ID, 0, 0, layer->width, layer->height); layer->offset_x = info[1]; layer->offset_y = info[2]; drawable_update (layer->ID, 0, 0, layer->width, layer->height); /* invalidate the selection boundary because of a layer modification */ layer_invalidate_boundary (layer); info[1] = old_offsets[0]; info[2] = old_offsets[1]; return TRUE; } else return FALSE; } void undo_free_layer_displace (int state, void *info_ptr) { g_free (info_ptr); } /*********************************/ /* Transform Undo */ int undo_push_transform (GImage *gimage, void *tu_ptr) { Undo * new; int size; size = sizeof (TransformUndo); if ((new = undo_push (gimage, size, TRANSFORM_UNDO))) { new->data = tu_ptr; new->pop_func = undo_pop_transform; new->free_func = undo_free_transform; return TRUE; } else { g_free (tu_ptr); return FALSE; } } int undo_pop_transform (GImage *gimage, int state, int type, void *tu_ptr) { TransformCore * tc; TransformUndo * tu; TileManager * temp; double d; int i; tc = (TransformCore *) active_tool->private; tu = (TransformUndo *) tu_ptr; /* only pop if the active tool is the tool that pushed this undo */ if (tu->tool_ID != active_tool->ID) return TRUE; /* swap the transformation information arrays */ for (i = 0; i < TRAN_INFO_SIZE; i++) { d = tu->trans_info[i]; tu->trans_info[i] = tc->trans_info[i]; tc->trans_info[i] = d; } /* if this is the first transform in a string, swap the * original buffer--the source buffer for repeated transforms */ if (tu->first) { temp = tu->original; tu->original = tc->original; tc->original = temp; /* If we're re-implementing the first transform, reactivate tool */ if (state == REDO && tc->original) { active_tool->state = ACTIVE; draw_core_resume (tc->core, active_tool); } } return TRUE; } void undo_free_transform (int state, void *tu_ptr) { TransformUndo * tu; tu = (TransformUndo *) tu_ptr; if (tu->original) tile_manager_destroy (tu->original); g_free (tu); } /*********************************/ /* Paint Undo */ int undo_push_paint (GImage *gimage, void *pu_ptr) { Undo * new; int size; size = sizeof (PaintUndo); if ((new = undo_push (gimage, size, PAINT_UNDO))) { new->data = pu_ptr; new->pop_func = undo_pop_paint; new->free_func = undo_free_paint; return TRUE; } else { g_free (pu_ptr); return FALSE; } } int undo_pop_paint (GImage *gimage, int state, int type, void *pu_ptr) { PaintCore * pc; PaintUndo * pu; double tmp; pc = (PaintCore *) active_tool->private; pu = (PaintUndo *) pu_ptr; /* only pop if the active tool is the tool that pushed this undo */ if (pu->tool_ID != active_tool->ID) return TRUE; /* swap the paint core information */ tmp = pc->lastx; pc->lastx = pu->lastx; pu->lastx = tmp; tmp = pc->lasty; pc->lasty = pu->lasty; pu->lasty = tmp; return TRUE; } void undo_free_paint (int state, void *pu_ptr) { PaintUndo * pu; pu = (PaintUndo *) pu_ptr; g_free (pu); } /*********************************/ /* New Layer Undo */ int undo_push_layer (GImage *gimage, void *lu_ptr) { LayerUndo *lu; Undo *new; int size; lu = (LayerUndo *) lu_ptr; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); drawable_dirty (lu->layer->ID); size = layer_size (lu->layer) + sizeof (LayerUndo); if ((new = undo_push (gimage, size, LAYER_UNDO))) { new->data = lu_ptr; new->pop_func = undo_pop_layer; new->free_func = undo_free_layer; return TRUE; } else { /* if this is a remove layer, delete the layer */ if (lu->undo_type == 1) layer_delete (lu->layer); g_free (lu); return FALSE; } } int undo_pop_layer (GImage *gimage, int state, int type, void *lu_ptr) { LayerUndo *lu; lu = (LayerUndo *) lu_ptr; switch (state) { case UNDO: gimage_clean (gimage); drawable_clean (lu->layer->ID); break; case REDO: gimage_dirty (gimage); drawable_dirty (lu->layer->ID); break; } /* remove layer */ if ((state == UNDO && lu->undo_type == 0) || (state == REDO && lu->undo_type == 1)) { /* record the current position */ lu->prev_position = gimage_get_layer_index (gimage, lu->layer->ID); /* set the previous layer */ gimage_set_active_layer (gimage, lu->prev_layer); /* remove the layer */ gimage->layers = remove_from_list (gimage->layers, lu->layer); gimage->layer_stack = remove_from_list (gimage->layer_stack, lu->layer); /* reset the gimage values */ if (layer_is_floating_sel (lu->layer)) { gimage->floating_sel = -1; /* reset the old drawable */ floating_sel_reset (lu->layer); } drawable_update (lu->layer->ID, 0, 0, lu->layer->width, lu->layer->height); } /* restore layer */ else { /* record the active layer */ lu->prev_layer = gimage->active_layer; /* hide the current selection--for all views */ if (gimage->active_layer != -1) layer_invalidate_boundary (layer_get_ID (gimage->active_layer)); /* if this is a floating selection, set the fs pointer */ if (layer_is_floating_sel (lu->layer)) gimage->floating_sel = lu->layer->ID; /* add the new layer */ gimage->layers = insert_in_list (gimage->layers, lu->layer, lu->prev_position); gimage->layer_stack = add_to_list (gimage->layer_stack, lu->layer); gimage->active_layer = lu->layer->ID; drawable_update (lu->layer->ID, 0, 0, lu->layer->width, lu->layer->height); } return TRUE; } void undo_free_layer (int state, void *lu_ptr) { LayerUndo *lu; lu = (LayerUndo *) lu_ptr; /* Only free the layer if we're freeing from the redo * stack and it's a layer add, or if we're freeing from * the undo stack and it's a layer remove */ if ((state == REDO && lu->undo_type == 0) || (state == UNDO && lu->undo_type == 1)) layer_delete (lu->layer); g_free (lu); } /*********************************/ /* Layer Mod Undo */ int undo_push_layer_mod (GImage *gimage, void *layer_ptr) { Layer *layer; Undo *new; TileManager *tiles; void **data; int size; layer = (Layer *) layer_ptr; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); drawable_dirty (layer->ID); tiles = layer->tiles; tiles->x = layer->offset_x; tiles->y = layer->offset_y; size = layer->width * layer->height * layer->bytes + sizeof (void *) * 3; if ((new = undo_push (gimage, size, LAYER_MOD))) { data = (void **) g_malloc (sizeof (void *) * 3); new->data = data; new->pop_func = undo_pop_layer_mod; new->free_func = undo_free_layer_mod; data[0] = layer_ptr; data[1] = (void *) tiles; data[2] = (void *) ((long) layer->type); return TRUE; } else { tile_manager_destroy (tiles); return FALSE; } } int undo_pop_layer_mod (GImage *gimage, int state, int type, void *data_ptr) { void **data; int layer_type; TileManager *tiles; TileManager *temp; Layer *layer; data = (void **) data_ptr; layer = (Layer *) data[0]; switch (state) { case UNDO: gimage_clean (gimage); drawable_clean (layer->ID); break; case REDO: gimage_dirty (gimage); drawable_dirty (layer->ID); break; } tiles = (TileManager *) data[1]; /* Issue the first update */ gdisplays_update_area (gimage->ID, layer->offset_x, layer->offset_y, layer->width, layer->height); /* Create a tile manager to store the current layer contents */ temp = layer->tiles; temp->x = layer->offset_x; temp->y = layer->offset_y; layer_type = (long) data[2]; data[2] = (void *) ((long) layer->type); /* restore the layer's data */ layer->tiles = tiles; layer->offset_x = tiles->x; layer->offset_y = tiles->y; layer->width = tiles->levels[0].width; layer->height = tiles->levels[0].height; layer->bytes = tiles->levels[0].bpp; layer->type = layer_type; /* If the layer type changed, update the gdisplay titles */ if (layer->type != (long) data[2]) gdisplays_update_title (layer->gimage_ID); /* Set the new tile manager */ data[1] = temp; /* Issue the second update */ drawable_update (layer->ID, 0, 0, layer->width, layer->height); return TRUE; } void undo_free_layer_mod (int state, void *data_ptr) { void ** data; data = (void **) data_ptr; tile_manager_destroy ((TileManager *) data[1]); g_free (data); } /*********************************/ /* Layer Mask Undo */ int undo_push_layer_mask (GImage *gimage, void *lmu_ptr) { LayerMaskUndo *lmu; Undo *new; int size; lmu = (LayerMaskUndo *) lmu_ptr; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); drawable_dirty (lmu->layer->ID); size = channel_size (lmu->mask) + sizeof (LayerMaskUndo); if ((new = undo_push (gimage, size, LAYER_MASK_UNDO))) { new->data = lmu_ptr; new->pop_func = undo_pop_layer_mask; new->free_func = undo_free_layer_mask; return TRUE; } else { if (lmu->undo_type == 1) channel_delete (lmu->mask); g_free (lmu); return FALSE; } } int undo_pop_layer_mask (GImage *gimage, int state, int type, void *lmu_ptr) { LayerMaskUndo *lmu; lmu = (LayerMaskUndo *) lmu_ptr; switch (state) { case UNDO: gimage_clean (gimage); drawable_clean (lmu->layer->ID); break; case REDO: gimage_dirty (gimage); drawable_dirty (lmu->layer->ID); break; } /* remove layer mask */ if ((state == UNDO && lmu->undo_type == 0) || (state == REDO && lmu->undo_type == 1)) { /* remove the layer mask */ lmu->layer->mask = NULL; lmu->layer->apply_mask = 0; lmu->layer->edit_mask = 0; lmu->layer->show_mask = 0; /* if this is redoing a remove operation & * the mode of application was DISCARD or * this is undoing an add... */ if ((state == REDO && lmu->mode == DISCARD) || state == UNDO) drawable_update (lmu->layer->ID, 0, 0, lmu->layer->width, lmu->layer->height); } /* restore layer */ else { lmu->layer->mask = lmu->mask; lmu->layer->apply_mask = lmu->apply_mask; lmu->layer->edit_mask = lmu->edit_mask; lmu->layer->show_mask = lmu->show_mask; gimage_set_layer_mask_edit (gimage, lmu->layer->ID, lmu->edit_mask); /* if this is undoing a remove operation & * the mode of application was DISCARD or * this is redoing an add */ if ((state == UNDO && lmu->mode == DISCARD) || state == REDO) drawable_update (lmu->layer->ID, 0, 0, lmu->layer->width, lmu->layer->height); } return TRUE; } void undo_free_layer_mask (int state, void *lmu_ptr) { LayerMaskUndo *lmu; lmu = (LayerMaskUndo *) lmu_ptr; /* Only free the layer mask if we're freeing from the redo * stack and it's a layer add, or if we're freeing from * the undo stack and it's a layer remove */ if ((state == REDO && lmu->undo_type == 0) || (state == UNDO && lmu->undo_type == 1)) channel_delete (lmu->mask); g_free (lmu); } /*********************************/ /* New Channel Undo */ int undo_push_channel (GImage *gimage, void *cu_ptr) { ChannelUndo *cu; Undo *new; int size; cu = (ChannelUndo *) cu_ptr; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); drawable_dirty (cu->channel->ID); size = channel_size (cu->channel) + sizeof (ChannelUndo); if ((new = undo_push (gimage, size, CHANNEL_UNDO))) { new->data = cu_ptr; new->pop_func = undo_pop_channel; new->free_func = undo_free_channel; return TRUE; } else { if (cu->undo_type == 1) channel_delete (cu->channel); g_free (cu); return FALSE; } } int undo_pop_channel (GImage *gimage, int state, int type, void *cu_ptr) { ChannelUndo *cu; cu = (ChannelUndo *) cu_ptr; switch (state) { case UNDO: gimage_clean (gimage); drawable_clean (cu->channel->ID); break; case REDO: gimage_dirty (gimage); drawable_dirty (cu->channel->ID); break; } /* remove channel */ if ((state == UNDO && cu->undo_type == 0) || (state == REDO && cu->undo_type == 1)) { /* record the current position */ cu->prev_position = gimage_get_channel_index (gimage, cu->channel->ID); /* remove the channel */ gimage->channels = remove_from_list (gimage->channels, cu->channel); /* set the previous channel */ gimage_set_active_channel (gimage, cu->prev_channel); /* update the area */ drawable_update (cu->channel->ID, 0, 0, cu->channel->width, cu->channel->height); } /* restore channel */ else { /* record the active channel */ cu->prev_channel = gimage->active_channel; /* add the new channel */ gimage->channels = insert_in_list (gimage->channels, cu->channel, cu->prev_position); /* set the new channel */ gimage_set_active_channel (gimage, cu->channel->ID); /* update the area */ drawable_update (cu->channel->ID, 0, 0, cu->channel->width, cu->channel->height); } return TRUE; } void undo_free_channel (int state, void *cu_ptr) { ChannelUndo *cu; cu = (ChannelUndo *) cu_ptr; /* Only free the channel if we're freeing from the redo * stack and it's a channel add, or if we're freeing from * the undo stack and it's a channel remove */ if ((state == REDO && cu->undo_type == 0) || (state == UNDO && cu->undo_type == 1)) channel_delete (cu->channel); g_free (cu); } /*********************************/ /* Channel Mod Undo */ int undo_push_channel_mod (GImage *gimage, void *channel_ptr) { Channel *channel; TileManager *tiles; Undo *new; void **data; int size; channel = (Channel *) channel_ptr; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); drawable_dirty (channel->ID); tiles = channel->tiles; size = channel->width * channel->height + sizeof (void *) * 2; if ((new = undo_push (gimage, size, CHANNEL_MOD))) { data = (void **) g_malloc (sizeof (void *) * 2); new->data = data; new->pop_func = undo_pop_channel_mod; new->free_func = undo_free_channel_mod; data[0] = channel_ptr; data[1] = (void *) tiles; return TRUE; } else { tile_manager_destroy (tiles); return FALSE; } } int undo_pop_channel_mod (GImage *gimage, int state, int type, void *data_ptr) { void **data; TileManager *tiles; TileManager *temp; Channel *channel; data = (void **) data_ptr; channel = (Channel *) data[0]; switch (state) { case UNDO: gimage_clean (gimage); drawable_clean (channel->ID); break; case REDO: gimage_dirty (gimage); drawable_dirty (channel->ID); break; } tiles = (TileManager *) data[1]; /* Issue the first update */ drawable_update (channel->ID, 0, 0, channel->width, channel->height); temp = channel->tiles; channel->tiles = tiles; channel->width = tiles->levels[0].width; channel->height = tiles->levels[0].height; /* Set the new buffer */ data[1] = temp; /* Issue the second update */ drawable_update (channel->ID, 0, 0, channel->width, channel->height); return TRUE; } void undo_free_channel_mod (int state, void *data_ptr) { void ** data; data = (void **) data_ptr; tile_manager_destroy ((TileManager *) data[1]); g_free (data); } /**************************************/ /* Floating Selection to Layer Undo */ int undo_push_fs_to_layer (GImage *gimage, void *fsu_ptr) { FStoLayerUndo *fsu; Undo *new; int size; fsu = (FStoLayerUndo *) fsu_ptr; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); drawable_dirty (fsu->layer->ID); size = sizeof (FStoLayerUndo); if ((new = undo_push (gimage, size, CHANNEL_MOD))) { new->data = fsu_ptr; new->pop_func = undo_pop_fs_to_layer; new->free_func = undo_free_fs_to_layer; return TRUE; } else { tile_manager_destroy (fsu->layer->fs.backing_store); g_free (fsu); return FALSE; } } int undo_pop_fs_to_layer (GImage *gimage, int state, int type, void *fsu_ptr) { FStoLayerUndo *fsu; fsu = (FStoLayerUndo *) fsu_ptr; switch (state) { case UNDO: gimage_clean (gimage); drawable_clean (fsu->layer->ID); break; case REDO: gimage_dirty (gimage); drawable_dirty (fsu->layer->ID); break; } switch (state) { case UNDO: /* Update the preview for the floating sel */ drawable_invalidate_preview (fsu->layer->ID); fsu->layer->fs.drawable = fsu->drawable; gimage->active_layer = fsu->layer->ID; gimage->floating_sel = fsu->layer->ID; /* restore the contents of the drawable */ floating_sel_store (fsu->layer, fsu->layer->offset_x, fsu->layer->offset_y, fsu->layer->width, fsu->layer->height); fsu->layer->fs.initial = TRUE; /* clear the selection */ layer_invalidate_boundary (fsu->layer); /* Update the preview for the gimage and underlying drawable */ drawable_invalidate_preview (fsu->layer->ID); break; case REDO: /* restore the contents of the drawable */ floating_sel_restore (fsu->layer, fsu->layer->offset_x, fsu->layer->offset_y, fsu->layer->width, fsu->layer->height); /* Update the preview for the gimage and underlying drawable */ drawable_invalidate_preview (fsu->layer->ID); /* clear the selection */ layer_invalidate_boundary (fsu->layer); /* update the pointers */ fsu->layer->fs.drawable = -1; gimage->floating_sel = -1; /* Update the fs drawable */ drawable_invalidate_preview (fsu->layer->ID); break; } return TRUE; } void undo_free_fs_to_layer (int state, void *fsu_ptr) { FStoLayerUndo *fsu; fsu = (FStoLayerUndo *) fsu_ptr; if (state == UNDO) tile_manager_destroy (fsu->layer->fs.backing_store); g_free (fsu); } /***********************************/ /* Floating Selection Rigor Undo */ int undo_push_fs_rigor (GImage *gimage, int layer_id) { Undo *new; int size; size = sizeof (int); if ((new = undo_push (gimage, size, FS_RIGOR))) { new->data = g_new (int, 1); new->pop_func = undo_pop_fs_rigor; new->free_func = undo_free_fs_rigor; *((int *) new->data) = layer_id; return TRUE; } else return FALSE; } int undo_pop_fs_rigor (GImage *gimage, int state, int type, void *layer_ptr) { int layer_id; Layer *floating_layer; layer_id = *((int *) layer_ptr); if ((floating_layer = layer_get_ID (layer_id)) == NULL) return FALSE; if (! layer_is_floating_sel (floating_layer)) return FALSE; switch (state) { case UNDO: /* restore the contents of drawable the floating layer is attached to */ if (floating_layer->fs.initial == FALSE) floating_sel_restore (floating_layer, floating_layer->offset_x, floating_layer->offset_y, floating_layer->width, floating_layer->height); floating_layer->fs.initial = TRUE; break; case REDO: /* store the affected area from the drawable in the backing store */ floating_sel_store (floating_layer, floating_layer->offset_x, floating_layer->offset_y, floating_layer->width, floating_layer->height); floating_layer->fs.initial = TRUE; break; } return TRUE; } void undo_free_fs_rigor (int state, void *layer_ptr) { g_free (layer_ptr); } /***********************************/ /* Floating Selection Relax Undo */ int undo_push_fs_relax (GImage *gimage, int layer_id) { Undo *new; int size; size = sizeof (int); if ((new = undo_push (gimage, size, FS_RELAX))) { new->data = g_new (int, 1); new->pop_func = undo_pop_fs_relax; new->free_func = undo_free_fs_relax; *((int *) new->data) = layer_id; return TRUE; } else return FALSE; } int undo_pop_fs_relax (GImage *gimage, int state, int type, void *layer_ptr) { int layer_id; Layer *floating_layer; layer_id = *((int *) layer_ptr); if ((floating_layer = layer_get_ID (layer_id)) == NULL) return FALSE; if (! layer_is_floating_sel (floating_layer)) return FALSE; switch (state) { case UNDO: /* store the affected area from the drawable in the backing store */ floating_sel_store (floating_layer, floating_layer->offset_x, floating_layer->offset_y, floating_layer->width, floating_layer->height); floating_layer->fs.initial = TRUE; break; case REDO: /* restore the contents of drawable the floating layer is attached to */ if (floating_layer->fs.initial == FALSE) floating_sel_restore (floating_layer, floating_layer->offset_x, floating_layer->offset_y, floating_layer->width, floating_layer->height); floating_layer->fs.initial = TRUE; break; } return TRUE; } void undo_free_fs_relax (int state, void *layer_ptr) { g_free (layer_ptr); } /*********************/ /* GImage Mod Undo */ int undo_push_gimage_mod (GImage *gimage) { Undo *new; int *data; int size; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); size = sizeof (int) * 3; if ((new = undo_push (gimage, size, GIMAGE_MOD))) { data = (int *) g_malloc (sizeof (int) * 3); new->data = data; new->pop_func = undo_pop_gimage_mod; new->free_func = undo_free_gimage_mod; data[0] = gimage->width; data[1] = gimage->height; data[2] = gimage->base_type; return TRUE; } return FALSE; } int undo_pop_gimage_mod (GImage *gimage, int state, int type, void *data_ptr) { int *data; int tmp; switch (state) { case UNDO: gimage_clean (gimage); break; case REDO: gimage_dirty (gimage); break; } data = (int *) data_ptr; tmp = data[0]; data[0] = gimage->width; gimage->width = tmp; tmp = data[1]; data[1] = gimage->height; gimage->height = tmp; tmp = data[2]; data[2] = gimage->base_type; gimage->base_type = tmp; gimage_projection_realloc (gimage); gimage_mask_invalidate (gimage); channel_invalidate_previews (gimage->ID); layer_invalidate_previews (gimage->ID); gimage_invalidate_preview (gimage); gdisplays_update_full (gimage->ID); gdisplays_update_title (gimage->ID); indexed_palette_update_image_list (); if (gimage->width != (int) data[0] || gimage->height != (int) data[1]) shrink_wrap = TRUE; return TRUE; } void undo_free_gimage_mod (int state, void *data_ptr) { g_free (data_ptr); } /***********/ /* Guide */ typedef struct _GuideUndo GuideUndo; struct _GuideUndo { GImage *gimage; Guide *guide; Guide orig; }; int undo_push_guide (GImage *gimage, void *guide) { Undo *new; GuideUndo *data; long size; /* increment the dirty flag for this gimage */ gimage_dirty (gimage); size = sizeof (GuideUndo); if ((new = undo_push (gimage, size, GIMAGE_MOD))) { data = g_new (GuideUndo, 1); new->data = data; new->pop_func = undo_pop_guide; new->free_func = undo_free_guide; data->gimage = gimage; data->guide = guide; data->orig = *(data->guide); return TRUE; } return FALSE; } int undo_pop_guide (GImage *gimage, int state, int type, void *data_ptr) { GuideUndo *data; Guide tmp; data = data_ptr; gdisplays_expose_guide (gimage->ID, data->guide); gdisplays_expose_guide (gimage->ID, &data->orig); tmp = *(data->guide); *(data->guide) = data->orig; data->orig = tmp; switch (state) { case UNDO: gimage_clean (gimage); break; case REDO: gimage_dirty (gimage); break; } return TRUE; } void undo_free_guide (int state, void *data_ptr) { GuideUndo *data; data = data_ptr; if (data->guide->position < 0) gimage_delete_guide (data->gimage, data->guide); g_free (data_ptr); }