/* gdkfontmetrics.c
   Copyright (C) 1999 Free Software Foundation, Inc.

This file is part of the peer AWT libraries of GNU Classpath.

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 verion.

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. */

#include "gtkpeer.h"
#include "gnu_java_awt_peer_gtk_GdkGraphics.h"
#include <gdk/gdkx.h>

#define ASCENT      0
#define MAX_ASCENT  1
#define DESCENT     2
#define MAX_DESCENT 3
#define MAX_ADVANCE 4
#define NUM_METRICS 5

JNIEXPORT jintArray JNICALL Java_gnu_java_awt_peer_gtk_GdkFontMetrics_initState
  (JNIEnv *env, jobject obj, jstring fname, jint size)
{
  jintArray array;
  jint *metrics;
  const char *cfname;
  char *xlfd;
  GdkFont *font;
  XFontStruct *xfont;

  cfname = (*env)->GetStringUTFChars (env, fname, NULL);
  xlfd = g_strdup_printf (cfname, (size * 10));
  (*env)->ReleaseStringUTFChars (env, fname, cfname);

  array = (*env)->NewIntArray (env, NUM_METRICS);
  metrics = (*env)->GetIntArrayElements (env, array, NULL);

  gdk_threads_enter ();
  font = gdk_font_load (xlfd);
  xfont = GDK_FONT_XFONT (font);

  metrics[ASCENT]      = font->ascent;
  metrics[MAX_ASCENT]  = xfont->max_bounds.ascent;
  metrics[DESCENT]     = font->descent;
  metrics[MAX_DESCENT] = xfont->max_bounds.descent;
  metrics[MAX_ADVANCE] = xfont->max_bounds.width;
  gdk_threads_leave ();

  g_free (xlfd);
  (*env)->ReleaseIntArrayElements (env, array, metrics, 0);

  NSA_SET_PTR (env, obj, font);

  return array;
}

JNIEXPORT jint JNICALL Java_gnu_java_awt_peer_gtk_GdkFontMetrics_stringWidth
  (JNIEnv *env, jobject obj, jstring str)
{
  GdkFont *font;
  const char *cstr;
  jint width;

  font = (GdkFont *) NSA_GET_PTR (env, obj);
  cstr = (*env)->GetStringUTFChars (env, str, NULL);

  gdk_threads_enter ();
  width = gdk_string_width (font, cstr);
  gdk_threads_leave ();

  (*env)->ReleaseStringUTFChars (env, str, cstr);

  return width;
}