libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkClasspathFontPeer.c

   1 /* gnu_java_awt_GdkFont.c
   2    Copyright (C) 2003 Free Software Foundation, Inc.
   3
   4    This file is part of GNU Classpath.
   5
   6    GNU Classpath is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    GNU Classpath is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GNU Classpath; see the file COPYING.  If not, write to the
  18    Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.
  20
  21    Linking this library statically or dynamically with other modules is
  22    making a combined work based on this library.  Thus, the terms and
  23    conditions of the GNU General Public License cover the whole
  24    combination.
  25
  26    As a special exception, the copyright holders of this library give you
  27    permission to link this library with independent modules to produce an
  28    executable, regardless of the license terms of these independent
  29    modules, and to copy and distribute the resulting executable under
  30    terms of your choice, provided that you also meet, for each linked
  31    independent module, the terms and conditions of the license of that
  32    module.  An independent module is a module which is not derived from
  33    or based on this library.  If you modify this library, you may extend
  34    this exception to your version of the library, but you are not
  35    obligated to do so.  If you do not wish to do so, delete this
  36    exception statement from your version. */
  37
  38 #include "gdkfont.h"
  39 #include "gnu_java_awt_peer_gtk_GdkClasspathFontPeer.h"
  40
  41 struct state_table *native_font_state_table;
  42
  43 /*
  44 rough sketch of the mapping between java and
  45 pango text objects:
  46
  47   Font              <->    - PangoFont
  48                            - PangoFontDescription
  49                            - PangoContext
  50
  51   GlyphVector       <->    - GList of PangoGlyphItem
  52                            - PangoFontDescription
  53                            - PangoContext
  54
  55   FontRenderContext <->    stays in plain java
  56
  57 */
  58
  59 enum java_awt_font_style {
  60   java_awt_font_PLAIN = 0,
  61   java_awt_font_BOLD = 1,
  62   java_awt_font_ITALIC = 2
  63 };
  64
  65 enum java_awt_font_baseline {
  66   java_awt_font_ROMAN_BASELINE = 0,
  67   java_awt_font_CENTER_BASELINE = 1,
  68   java_awt_font_HANGING_BASELINE = 2
  69 };
  70
  71 JNIEXPORT void JNICALL Java_gnu_java_awt_peer_gtk_GdkClasspathFontPeer_initStaticState
  72   (JNIEnv *env, jclass clazz)
  73 {
  74   NSA_FONT_INIT (env, clazz);
  75 }
  76
  77 JNIEXPORT void JNICALL Java_gnu_java_awt_peer_gtk_GdkClasspathFontPeer_initState
  78   (JNIEnv *env, jobject self)
  79 {
  80   struct peerfont *pfont = NULL;
  81
  82   gdk_threads_enter ();
  83   g_assert (self != NULL);
  84   pfont = (struct peerfont *) g_malloc0 (sizeof (struct peerfont));
  85   g_assert (pfont != NULL);
  86   NSA_SET_FONT_PTR (env, self, pfont);
  87   gdk_threads_leave ();
  88 }
  89
  90
  91 JNIEXPORT void JNICALL Java_gnu_java_awt_peer_gtk_GdkClasspathFontPeer_dispose
  92   (JNIEnv *env, jobject self)
  93 {
  94   struct peerfont *pfont = NULL;
  95
  96   gdk_threads_enter ();
  97   pfont = (struct peerfont *)NSA_DEL_FONT_PTR (env, self);
  98   g_assert (pfont != NULL);
  99   if (pfont->ctx != NULL)
 100     g_object_unref (pfont->ctx);
 101   if (pfont->font != NULL)
 102     g_object_unref (pfont->font);
 103   if (pfont->desc != NULL)
 104     pango_font_description_free (pfont->desc);
 105   g_free (pfont);
 106   gdk_threads_leave ();
 107 }
 108
 109 JNIEXPORT void JNICALL Java_gnu_java_awt_peer_gtk_GdkClasspathFontPeer_setFont
 110   (JNIEnv *env, jobject self, jstring family_name_str, jint style_int, jint size)
 111 {
 112   struct peerfont *pfont = NULL;
 113   PangoFontMap *map = NULL;
 114   char const *family_name = NULL;
 115
 116   gdk_threads_enter ();
 117   enum java_awt_font_style style = (enum java_awt_font_style) style_int;
 118
 119   g_assert (self != NULL);
 120   pfont = (struct peerfont *)NSA_GET_FONT_PTR (env, self);
 121   g_assert (pfont != NULL);
 122
 123   if (pfont->ctx != NULL)
 124     g_object_unref (pfont->ctx);
 125   if (pfont->font != NULL)
 126     g_object_unref (pfont->font);
 127   if (pfont->desc != NULL)
 128     pango_font_description_free (pfont->desc);
 129
 130   pfont->desc = pango_font_description_new ();
 131   g_assert (pfont->desc != NULL);
 132
 133   family_name = (*env)->GetStringUTFChars(env, family_name_str, 0);
 134   g_assert (family_name != NULL);
 135   pango_font_description_set_family (pfont->desc, family_name);
 136   (*env)->ReleaseStringUTFChars(env, family_name_str, family_name);
 137
 138   pango_font_description_set_size (pfont->desc, size * PANGO_SCALE);
 139
 140   if (style & java_awt_font_BOLD)
 141     pango_font_description_set_weight (pfont->desc, PANGO_WEIGHT_BOLD);
 142
 143   if (style & java_awt_font_ITALIC)
 144     pango_font_description_set_style (pfont->desc, PANGO_STYLE_ITALIC);
 145
 146   /*
 147      FIXME: these are possibly wrong, and should in any case
 148      probably be cached between calls.
 149    */
 150
 151   map = pango_ft2_font_map_for_display ();
 152   g_assert (map != NULL);
 153
 154   if (pfont->ctx == NULL)
 155     pfont->ctx = pango_ft2_font_map_create_context (PANGO_FT2_FONT_MAP (map));
 156   g_assert (pfont->ctx != NULL);
 157
 158   if (pfont->font != NULL)
 159     g_object_unref (pfont->font);
 160
 161   pfont->font = pango_font_map_load_font (map, pfont->ctx, pfont->desc);
 162   g_assert (pfont->font != NULL);
 163
 164   gdk_threads_leave ();
 165 }
 166
 167