1 files changed, 93 insertions, 0 deletions
diff --git a/libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkClasspathFontPeerMetrics.c b/libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkClasspathFontPeerMetrics.c
new file mode 100644
index 00000000000..0f0b424467c
--- /dev/null
+++ b/libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkClasspathFontPeerMetrics.c
@@ -0,0 +1,93 @@
+/* gnu_java_awt_peer_gtk_GdkClasspathFontPeerMetrics.c
+   Copyright (C) 1999, 2003 Free Software Foundation, Inc.
+
+   This file is part of GNU Classpath.
+   
+   GNU Classpath 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, or (at your option)
+   any later version.
+   
+   GNU Classpath 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
+   General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with GNU Classpath; see the file COPYING.  If not, write to the
+   Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.
+   
+   Linking this library statically or dynamically with other modules is
+   making a combined work based on this library.  Thus, the terms and
+   conditions of the GNU General Public License cover the whole
+   combination.
+   
+   As a special exception, the copyright holders of this library give you
+   permission to link this library with independent modules to produce an
+   executable, regardless of the license terms of these independent
+   modules, and to copy and distribute the resulting executable under
+   terms of your choice, provided that you also meet, for each linked
+   independent module, the terms and conditions of the license of that
+   module.  An independent module is a module which is not derived from
+   or based on this library.  If you modify this library, you may extend
+   this exception to your version of the library, but you are not
+   obligated to do so.  If you do not wish to do so, delete this
+   exception statement from your version. */
+
+#include <math.h>
+
+#include "gtkpeer.h"
+#include "gdkfont.h"
+#include "gnu_java_awt_peer_gtk_GdkClasspathFontPeerMetrics.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_GdkClasspathFontPeerMetrics_initState
+  (JNIEnv *env, jobject self, jobject font)
+{
+  jintArray array;
+  jint *metrics;
+  struct peerfont *pf = NULL;
+
+  pf = NSA_GET_FONT_PTR(env, font);
+  g_assert (pf != NULL);
+
+  array = (*env)->NewIntArray (env, NUM_METRICS);
+  metrics = (*env)->GetIntArrayElements (env, array, NULL);
+
+  gdk_threads_enter ();
+
+#define DOUBLE_TO_26_6(d) ((FT_F26Dot6)((d) * 63.0))
+#define DOUBLE_FROM_26_6(t) (((double)((t) >> 6)) \
+			     + ((double)((t) & 0x3F) / 63.0))
+
+  double pointsize = pango_font_description_get_size (pf->desc);
+  pointsize /= (double) PANGO_SCALE;
+
+  FT_Face face = pango_ft2_font_get_face (pf->font);  
+  FT_Set_Char_Size( face, 
+		    DOUBLE_TO_26_6 (pointsize),
+		    DOUBLE_TO_26_6 (pointsize),
+		    0, 0);
+
+  metrics[ASCENT]      = ceil (DOUBLE_FROM_26_6(face->size->metrics.ascender));
+  metrics[MAX_ASCENT]  = metrics[ASCENT];
+  metrics[DESCENT]     = floor (DOUBLE_FROM_26_6(face->size->metrics.descender));
+  if (metrics[DESCENT] < 0)
+    metrics[DESCENT] = - metrics[DESCENT];
+  metrics[MAX_DESCENT] = metrics[DESCENT];
+  metrics[MAX_ADVANCE] = ceil (DOUBLE_FROM_26_6(face->size->metrics.max_advance));
+
+  gdk_threads_leave ();
+
+  (*env)->ReleaseIntArrayElements (env, array, metrics, 0);
+
+  return array;
+}
+