gtk/gdk/gdkgc.c

/* GDK - The GIMP Drawing Kit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library 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 Library 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.
 */

/*
 * Modified by the GTK+ Team and others 1997-1999.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

#include <string.h>

#include "gdkgc.h"
#include "gdkprivate.h"

GdkGC*
gdk_gc_alloc (void)
{
  GdkGCPrivate *private;

  private = g_new (GdkGCPrivate, 1);
  private->ref_count = 1;
  private->klass = NULL;
  private->klass_data = NULL;
  private->clip_x_origin = 0;
  private->clip_y_origin = 0;
  private->ts_x_origin = 0;
  private->ts_y_origin = 0;

  return (GdkGC *)private;
}

GdkGC*
gdk_gc_new (GdkDrawable *drawable)
{
  g_return_val_if_fail (drawable != NULL, NULL);

  if (GDK_DRAWABLE_DESTROYED (drawable))
    return NULL;

  return gdk_gc_new_with_values (drawable, NULL, 0);
}

GdkGC*
gdk_gc_new_with_values (GdkDrawable	*drawable,
			GdkGCValues	*values,
			GdkGCValuesMask	 values_mask)
{
  GdkGC *gc;
  GdkGCPrivate *private;

  g_return_val_if_fail (drawable != NULL, NULL);

  if (GDK_DRAWABLE_DESTROYED (drawable))
    return NULL;

  gc = ((GdkDrawablePrivate *)drawable)->klass->create_gc (drawable,
							   values,
							   values_mask);
  private = (GdkGCPrivate *)gc;
  
  if (values_mask & GDK_GC_CLIP_X_ORIGIN)
    private->clip_x_origin = values->clip_x_origin;
  if (values_mask & GDK_GC_CLIP_Y_ORIGIN)
    private->clip_y_origin = values->clip_y_origin;
  if (values_mask & GDK_GC_TS_X_ORIGIN)
    private->ts_x_origin = values->ts_x_origin;
  if (values_mask & GDK_GC_TS_Y_ORIGIN)
    private->ts_y_origin = values->ts_y_origin;

  return gc;
}

GdkGC *
gdk_gc_ref (GdkGC *gc)
{
  GdkGCPrivate *private = (GdkGCPrivate*) gc;

  g_return_val_if_fail (gc != NULL, NULL);
  private->ref_count += 1;

  return gc;
}

void
gdk_gc_unref (GdkGC *gc)
{
  GdkGCPrivate *private = (GdkGCPrivate*) gc;
  
  g_return_if_fail (gc != NULL);
  g_return_if_fail (private->ref_count > 0);
  
  private->ref_count--;

  if (private->ref_count == 0)
    {
      private->klass->destroy (gc);
      g_free (private);
    }
}

void
gdk_gc_get_values (GdkGC       *gc,
		   GdkGCValues *values)
{
  g_return_if_fail (gc != NULL);
  g_return_if_fail (values != NULL);

  ((GdkGCPrivate *)gc)->klass->get_values (gc, values);
}

void
gdk_gc_set_values (GdkGC           *gc,
		   GdkGCValues	   *values,
		   GdkGCValuesMask  values_mask)
{
  GdkGCPrivate *private = (GdkGCPrivate *)gc;
  
  g_return_if_fail (gc != NULL);
  g_return_if_fail (values != NULL);

  if (values_mask & GDK_GC_CLIP_X_ORIGIN)
    private->clip_x_origin = values->clip_x_origin;
  if (values_mask & GDK_GC_CLIP_Y_ORIGIN)
    private->clip_y_origin = values->clip_y_origin;
  if (values_mask & GDK_GC_TS_X_ORIGIN)
    private->ts_x_origin = values->ts_x_origin;
  if (values_mask & GDK_GC_TS_Y_ORIGIN)
    private->ts_y_origin = values->ts_y_origin;
  
  private->klass->set_values (gc, values, values_mask);
}

void
gdk_gc_set_foreground (GdkGC	*gc,
		       GdkColor *color)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);
  g_return_if_fail (color != NULL);

  values.foreground = *color;
  gdk_gc_set_values (gc, &values, GDK_GC_FOREGROUND);
}

void
gdk_gc_set_background (GdkGC	*gc,
		       GdkColor *color)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);
  g_return_if_fail (color != NULL);

  values.background = *color;
  gdk_gc_set_values (gc, &values, GDK_GC_BACKGROUND);
}

void
gdk_gc_set_font (GdkGC	 *gc,
		 GdkFont *font)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);
  g_return_if_fail (font != NULL);

  values.font = font;
  gdk_gc_set_values (gc, &values, GDK_GC_FONT);
}

void
gdk_gc_set_function (GdkGC	 *gc,
		     GdkFunction  function)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);

  values.function = function;
  gdk_gc_set_values (gc, &values, GDK_GC_FUNCTION);
}

void
gdk_gc_set_fill (GdkGC	 *gc,
		 GdkFill  fill)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);

  values.fill = fill;
  gdk_gc_set_values (gc, &values, GDK_GC_FILL);
}

void
gdk_gc_set_tile (GdkGC	   *gc,
		 GdkPixmap *tile)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);

  values.tile = tile;
  gdk_gc_set_values (gc, &values, GDK_GC_TILE);
}

void
gdk_gc_set_stipple (GdkGC     *gc,
		    GdkPixmap *stipple)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);

  values.stipple = stipple;
  gdk_gc_set_values (gc, &values, GDK_GC_STIPPLE);
}

void
gdk_gc_set_ts_origin (GdkGC *gc,
		      gint   x,
		      gint   y)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);

  values.ts_x_origin = x;
  values.ts_y_origin = y;
  
  gdk_gc_set_values (gc, &values,
		     GDK_GC_TS_X_ORIGIN | GDK_GC_TS_Y_ORIGIN);
}

void
gdk_gc_set_clip_origin (GdkGC *gc,
			gint   x,
			gint   y)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);

  values.clip_x_origin = x;
  values.clip_y_origin = y;
  
  gdk_gc_set_values (gc, &values,
		     GDK_GC_CLIP_X_ORIGIN | GDK_GC_CLIP_Y_ORIGIN);
}

void
gdk_gc_set_clip_mask (GdkGC	*gc,
		      GdkBitmap *mask)
{
  GdkGCValues values;
  
  g_return_if_fail (gc != NULL);
  
  values.clip_mask = mask;
  gdk_gc_set_values (gc, &values, GDK_GC_CLIP_MASK);
}


void
gdk_gc_set_subwindow (GdkGC	       *gc,
		      GdkSubwindowMode	mode)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);

  values.subwindow_mode = mode;
  gdk_gc_set_values (gc, &values, GDK_GC_SUBWINDOW);
}

void
gdk_gc_set_exposures (GdkGC     *gc,
		      gboolean   exposures)
{
  GdkGCValues values;

  g_return_if_fail (gc != NULL);

  values.graphics_exposures = exposures;
  gdk_gc_set_values (gc, &values, GDK_GC_EXPOSURES);
}

void
gdk_gc_set_line_attributes (GdkGC	*gc,
			    gint	 line_width,
			    GdkLineStyle line_style,
			    GdkCapStyle	 cap_style,
			    GdkJoinStyle join_style)
{
  GdkGCValues values;

  values.line_width = line_width;
  values.line_style = line_style;
  values.cap_style = cap_style;
  values.join_style = join_style;

  gdk_gc_set_values (gc, &values,
		     GDK_GC_LINE_WIDTH |
		     GDK_GC_LINE_STYLE |
		     GDK_GC_CAP_STYLE |
		     GDK_GC_JOIN_STYLE);
}

void
gdk_gc_set_dashes (GdkGC *gc,
		   gint	  dash_offset,
		   gint8  dash_list[],
		   gint   n)
{
  g_return_if_fail (gc != NULL);
  g_return_if_fail (dash_list != NULL);

  ((GdkGCPrivate *)gc)->klass->set_dashes (gc, dash_offset, dash_list, n);
}