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/*    layer.h
      Copyright (C) 2005-2006 Mark Tyler

      This file is part of mtPaint.

      mtPaint 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.

      mtPaint is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      GNU General Public License for more details.

      You should have received a copy of the GNU General Public License
      along with mtPaint in the file COPYING.

#include <gtk/gtk.h>

#define MAX_LAYERS 100
#define LAYERS_HEADER "# mtPaint layers"

#define ANIMATION_HEADER "# mtPaint animation"
#define MAX_POS_SLOTS 100
#define TOT_POS_ITEMS 5


00032 typedef struct
      char mem_filename[256];
      chanlist mem_img;
      int mem_channel;
      int mem_img_bpp, mem_changed, mem_width, mem_height, mem_ics;
      float mem_icx, mem_icy;

      undo_item mem_undo_im_[MAX_UNDO];
      int mem_undo_pointer, mem_undo_done, mem_undo_redo;

      png_color mem_pal[256];
      int mem_cols, tool_pat, mem_prot_RGB[256], mem_col_[2];
      png_color mem_col_24[2];

      int mem_xpm_trans, mem_xbm_hot_x, mem_xbm_hot_y;

      char mem_prot_mask[256];
      int mem_prot;

      int ani_pos[MAX_POS_SLOTS][5];
} layer_image;                      // All as per memory.h definitions

typedef struct
      char name[35];                // Layer text name
      int x, y, trans, opacity;     // Position of layer, transparency colour, opacity %
      gboolean visible, use_trans;  // Show layer, use transparency
      layer_image *image;           // Pointer to image data - malloc'd when created, free'd after
} layer_node;

GtkWidget *layers_window;

layer_node layer_table[MAX_LAYERS+1];     // Table of layer info

int   layers_total,                 // Layers currently in use
      layer_selected,               // Layer currently selected in the layers window
      layers_changed;               // 0=Unchanged

char  layers_filename[256];         // Current filename for layers file
gboolean show_layers_main,          // Show all layers in main window
      layers_pastry_cut;            // Pastry cut layers in view area (for animation previews)


void layers_init();
void pressed_layers( GtkMenuItem *menu_item, gpointer user_data );
void pressed_paste_layer( GtkMenuItem *menu_item, gpointer user_data );
gint delete_layers_window();

int load_layers( char *file_name );
int save_layers( char *file_name );
void layer_press_save();
void layer_press_save_as();
void layer_press_save_composite();
int layer_save_composite(char *fname, ls_settings *settings);

void layers_notify_changed();
void layer_press_remove_all();
int check_layers_for_changes();
void move_layer_relative(int l, int change_x, int change_y);      // Move a layer & update window labels
void layer_new( int w, int h, int type, int cols, int cmask );    // Types 1=indexed, 2=grey, 3=RGB
void layer_choose( int l );                     // Select a new layer from the list

void layer_iconbar_click(GtkWidget *widget, gpointer data);

void string_chop( char *txt );
int read_file_num(FILE *fp, char *txt);

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