mirror of https://github.com/GNOME/gimp.git
133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h>
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#include "appenv.h"
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#include "draw_core.h"
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DrawCore *
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draw_core_new (draw_func)
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DrawCoreDraw draw_func;
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{
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DrawCore * core;
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core = (DrawCore *) g_malloc (sizeof (DrawCore));
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core->draw_func = draw_func;
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core->draw_state = INVISIBLE;
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core->gc = NULL;
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core->paused_count = 0;
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core->data = NULL;
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core->line_width = 1;
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core->line_style = GDK_LINE_SOLID;
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core->cap_style = GDK_CAP_BUTT;
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core->join_style = GDK_JOIN_MITER;
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return core;
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}
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void
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draw_core_start (core, win, tool)
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DrawCore *core;
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GdkWindow *win;
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Tool *tool;
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{
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GdkColor fg, bg;
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if (core->draw_state != INVISIBLE)
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draw_core_stop (core, tool);
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core->win = win;
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core->data = (void *) tool;
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core->paused_count = 0; /* reset pause counter to 0 */
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/* create a new graphics context */
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if (! core->gc)
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core->gc = gdk_gc_new (win);
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gdk_gc_set_function (core->gc, GDK_INVERT);
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fg.pixel = 0xFFFFFFFF;
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bg.pixel = 0x00000000;
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gdk_gc_set_foreground (core->gc, &fg);
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gdk_gc_set_background (core->gc, &bg);
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gdk_gc_set_line_attributes (core->gc, core->line_width, core->line_style,
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core->cap_style, core->join_style);
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(* core->draw_func) (tool);
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core->draw_state = VISIBLE;
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}
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void
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draw_core_stop (core, tool)
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DrawCore * core;
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Tool * tool;
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{
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if (core->draw_state == INVISIBLE)
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return;
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(* core->draw_func) (tool);
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core->draw_state = INVISIBLE;
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}
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void
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draw_core_resume (core, tool)
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DrawCore * core;
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Tool * tool;
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{
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core->paused_count = (core->paused_count > 0) ? core->paused_count - 1 : 0;
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if (core->paused_count == 0)
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{
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core->draw_state = VISIBLE;
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(* core->draw_func) (tool);
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}
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}
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void
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draw_core_pause (core, tool)
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DrawCore * core;
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Tool * tool;
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{
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if (core->paused_count == 0)
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{
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core->draw_state = INVISIBLE;
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(* core->draw_func) (tool);
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}
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core->paused_count++;
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}
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void
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draw_core_free (core)
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DrawCore * core;
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{
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if (core)
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{
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if (core->gc)
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gdk_gc_destroy (core->gc);
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g_free (core);
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}
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}
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