libjava/jawt.c

   1 /* jawt.c -- X11 implementation of the AWT Native Interface
   2    Copyright (C) 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA
  19    02110-1301 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 <stdlib.h>
  39 #include <jni.h>
  40 #include <jawt.h>
  41 #include <jawt_md.h>
  42 #include "classpath_jawt.h"
  43
  44 static jint (JNICALL _Jv_Lock) (JAWT_DrawingSurface* surface);
  45 static void (JNICALL _Jv_Unlock) (JAWT_DrawingSurface* surface);
  46 static JAWT_DrawingSurfaceInfo* (JNICALL _Jv_GetDrawingSurfaceInfo)
  47      (JAWT_DrawingSurface* surface);
  48 static void (JNICALL _Jv_FreeDrawingSurfaceInfo)
  49      (JAWT_DrawingSurfaceInfo* surface_info);
  50 static JAWT_DrawingSurface* (JNICALL _Jv_GetDrawingSurface) (JNIEnv* env,
  51                                                              jobject canvas);
  52 static void (JNICALL _Jv_FreeDrawingSurface) (JAWT_DrawingSurface* surface);
  53 static void (JNICALL _Jv_AWTLock) (JNIEnv*);
  54 static void (JNICALL _Jv_AWTUnlock) (JNIEnv*);
  55
  56 JNIEXPORT jboolean JNICALL
  57 JAWT_GetAWT (JNIEnv* env, JAWT* awt)
  58 {
  59   jint retrieved_version;
  60
  61   retrieved_version = classpath_jawt_get_awt_version ();
  62
  63   if (awt->version > retrieved_version)
  64     return JNI_FALSE;
  65
  66   awt->GetDrawingSurface = _Jv_GetDrawingSurface;
  67   awt->FreeDrawingSurface = _Jv_FreeDrawingSurface;
  68   awt->Lock = _Jv_AWTLock;
  69   awt->Unlock = _Jv_AWTUnlock;
  70
  71   return JNI_TRUE;
  72 }
  73
  74 /* JAWT_DrawingSurface functions */
  75
  76 static jint
  77 (JNICALL _Jv_Lock) (JAWT_DrawingSurface* surface)
  78 {
  79   return classpath_jawt_object_lock (surface->lock);
  80 }
  81
  82 static void
  83 (JNICALL _Jv_Unlock) (JAWT_DrawingSurface* surface)
  84 {
  85   classpath_jawt_object_unlock (surface->lock);
  86 }
  87
  88 static JAWT_DrawingSurfaceInfo*
  89 (JNICALL _Jv_GetDrawingSurfaceInfo) (JAWT_DrawingSurface* surface)
  90 {
  91   if (surface == NULL)
  92     return NULL;
  93
  94   return surface->surface_info;
  95 }
  96
  97 static void
  98 (JNICALL _Jv_FreeDrawingSurfaceInfo) (JAWT_DrawingSurfaceInfo* surface_info)
  99 {
 100   JAWT_X11DrawingSurfaceInfo* surface_info_x11;
 101
 102   if (surface_info == NULL)
 103     return;
 104
 105   surface_info_x11 = (JAWT_X11DrawingSurfaceInfo*) surface_info->platformInfo;
 106
 107   surface_info_x11->display = NULL;
 108   surface_info_x11->drawable = 0;
 109   surface_info_x11->visualID = 0;
 110
 111   free (surface_info->platformInfo);
 112   free (surface_info);
 113   surface_info = NULL;
 114 }
 115
 116 /* JAWT functions */
 117
 118 static JAWT_DrawingSurface*
 119 (JNICALL _Jv_GetDrawingSurface) (JNIEnv* env, jobject canvas)
 120 {
 121   JAWT_DrawingSurface* surface;
 122   JAWT_X11DrawingSurfaceInfo* surface_info_x11;
 123
 124   surface = (JAWT_DrawingSurface*) malloc (sizeof (JAWT_DrawingSurface));
 125
 126   if (surface == NULL)
 127     return NULL;
 128
 129   /* initialize function pointers */
 130   surface->GetDrawingSurfaceInfo = _Jv_GetDrawingSurfaceInfo;
 131   surface->FreeDrawingSurfaceInfo = _Jv_FreeDrawingSurfaceInfo;
 132
 133   surface->Lock = _Jv_Lock;
 134   surface->Unlock = _Jv_Unlock;
 135
 136   surface->surface_info = (JAWT_DrawingSurfaceInfo*) malloc (sizeof (JAWT_DrawingSurfaceInfo));
 137
 138   surface->lock = classpath_jawt_create_lock ();
 139
 140   if (surface->surface_info == NULL)
 141     return NULL;
 142
 143   surface->surface_info->platformInfo = malloc (sizeof (JAWT_X11DrawingSurfaceInfo));
 144
 145   if (surface->surface_info->platformInfo == NULL)
 146     return NULL;
 147
 148   surface_info_x11 = (JAWT_X11DrawingSurfaceInfo*) surface->surface_info->platformInfo;
 149
 150   surface_info_x11->display = classpath_jawt_get_default_display (env, canvas);
 151   surface_info_x11->drawable = classpath_jawt_get_drawable (env, canvas);
 152   surface_info_x11->visualID = classpath_jawt_get_visualID (env, canvas);
 153
 154   /* FIXME: also include bounding rectangle of drawing surface */
 155   /* FIXME: also include current clipping region */
 156
 157   return surface;
 158 }
 159
 160 static void
 161 (JNICALL _Jv_FreeDrawingSurface) (JAWT_DrawingSurface* surface)
 162 {
 163   classpath_jawt_destroy_lock (surface->lock);
 164   free (surface);
 165 }
 166
 167 static void
 168 (JNICALL _Jv_AWTLock) (JNIEnv* env)
 169 {
 170   classpath_jawt_lock ();
 171 }
 172
 173 static void
 174 (JNICALL _Jv_AWTUnlock) (JNIEnv* env)
 175 {
 176   classpath_jawt_unlock ();
 177 }
 178