diff options
Diffstat (limited to 'libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkClasspathFontPeerMetrics.c')
-rw-r--r-- | libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkClasspathFontPeerMetrics.c | 93 |
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 0000000..0f0b424 --- /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; +} + |