142 lines
4.7 KiB
C
142 lines
4.7 KiB
C
/* vim:expandtab:ts=2 sw=2:
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*/
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/* Grafx2 - The Ultimate 256-color bitmap paint program
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Copyright 2011 Pawel Góralski
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Copyright 2007 Adrien Destugues
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Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
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Grafx2 is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2
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of the License.
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Grafx2 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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You should have received a copy of the GNU General Public License
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along with Grafx2; if not, see <http://www.gnu.org/licenses/>
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*/
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//////////////////////////////////////////////////////////////////////////////
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///@file pages.h
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/// Handler for the Undo/Redo system.
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//////////////////////////////////////////////////////////////////////////////
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#ifndef _PAGES_H_
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#define _PAGES_H_
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///
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/// Pointer to the image to read, while drawing. It's either the last history
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/// layer page when FX feedback is on, or the history page before it
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/// when FX feedback is off.
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extern byte * FX_feedback_screen;
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//////////////////////////////////////////////////////////////////////////
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/////////////////////////// BACKUP ///////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////
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/// The pixels of visible layers, flattened copy, used for no-feedback effects.
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extern T_Bitmap Main_visible_image_backup;
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/// The index of visible pixels from ::Main.visible_image. Points to the right layer.
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extern T_Bitmap Main_visible_image_depth_buffer;
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///
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/// INDIVIDUAL PAGES
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///
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void Download_infos_page_main(T_Page * page);
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/// Add a new layer to latest page of a list. Returns 0 on success.
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byte Add_layer(T_List_of_pages *list, int layer);
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/// Delete a layer from the latest page of a list. Returns 0 on success.
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byte Delete_layer(T_List_of_pages *list, int layer);
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/// Merges the current layer onto the one below it.
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byte Merge_layer();
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/// Backs up a layer, unless it's already different from previous history step.
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int Dup_layer_if_shared(T_Page * page, int layer);
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void Upload_infos_page(T_Document * doc);
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// private
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T_Page * New_page(int nb_layers);
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void Download_infos_page_spare(T_Page * page);
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void Clear_page(T_Page * page);
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void Copy_S_page(T_Page * dest,T_Page * source);
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///
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/// LISTS OF PAGES
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///
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void Init_list_of_pages(T_List_of_pages * list);
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// private
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int Allocate_list_of_pages(T_List_of_pages * list);
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void Backward_in_list_of_pages(T_List_of_pages * list);
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void Advance_in_list_of_pages(T_List_of_pages * list);
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void Free_last_page_of_list(T_List_of_pages * list);
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int Create_new_page(T_Page * new_page,T_List_of_pages * current_list, int layer);
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void Change_page_number_of_list(T_List_of_pages * list,int number);
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void Free_page_of_a_list(T_List_of_pages * list);
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///
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/// BACKUP HIGH-LEVEL FUNCTIONS
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///
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static const int LAYER_NONE = -1;
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static const int LAYER_ALL = -2;
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int Init_all_backup_lists(enum IMAGE_MODES image_mode,int width,int height);
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void Set_number_of_backups(int nb_backups);
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int Backup_new_image(int layers,int width,int height);
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int Backup_with_new_dimensions(int width,int height);
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///
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/// Resizes a backup step in-place (doesn't add a Undo/Redo step).
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/// Should only be called after an actual backup, because it loses the current.
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/// pixels. This function is meant to be used from within Lua scripts.
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int Backup_in_place(int width,int height);
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/// Backup the spare image, the one you don't see.
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void Backup_the_spare(int layer);
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int Backup_and_resize_the_spare(int width,int height);
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/// Backup with a new copy for the working layer, and references for all others.
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void Backup(void);
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/// Backup with a new copy of some layers (the others are references).
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void Backup_layers(int layer);
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void Undo(void);
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void Redo(void);
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void Free_current_page(void); // 'Kill' button
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void End_of_modification(void);
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void Update_depth_buffer(void);
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void Redraw_layered_image(void);
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void Redraw_current_layer(void);
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void Update_screen_targets(void);
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/// Update all the special image buffers, if necessary.
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int Update_buffers(int width, int height);
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int Update_spare_buffers(int width, int height);
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void Redraw_spare_image(void);
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///
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/// Must be called after changing the head of Main_backups list, or
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/// Main_current_layer
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void Update_FX_feedback(byte with_feedback);
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void Switch_layer_mode(enum IMAGE_MODES new_mode);
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///
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/// STATISTICS
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///
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/// Total number of unique bitmaps (layers, animation frames, backups)
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extern long Stats_pages_number;
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/// Total memory used by bitmaps (layers, animation frames, backups)
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extern long long Stats_pages_memory;
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#endif
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