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., 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 <stdlib.h>
  39 #include <jni.h>
  40 #include <jawt.h>
  41 #include <jawt_md.h>
  42 #include "classpath_jawt.h"
  43 #include <malloc.h>
  44
  45 static jint (JNICALL _Jv_Lock) (JAWT_DrawingSurface* surface);
  46 static void (JNICALL _Jv_Unlock) (JAWT_DrawingSurface* surface);
  47 static JAWT_DrawingSurfaceInfo* (JNICALL _Jv_GetDrawingSurfaceInfo)
  48      (JAWT_DrawingSurface* surface);
  49 static void (JNICALL _Jv_FreeDrawingSurfaceInfo)
  50      (JAWT_DrawingSurfaceInfo* surface_info);
  51 static JAWT_DrawingSurface* (JNICALL _Jv_GetDrawingSurface) (JNIEnv* env,
  52                                                              jobject canvas);
  53 static void (JNICALL _Jv_FreeDrawingSurface) (JAWT_DrawingSurface* surface);
  54 static void (JNICALL _Jv_AWTLock) (JNIEnv*);
  55 static void (JNICALL _Jv_AWTUnlock) (JNIEnv*);
  56
  57 JNIEXPORT jboolean JNICALL
  58 JAWT_GetAWT (JNIEnv* env, JAWT* awt)
  59 {
  60   jint retrieved_version;
  61
  62   retrieved_version = classpath_jawt_get_awt_version ();
  63
  64   if (awt->version > retrieved_version)
  65     return JNI_FALSE;
  66
  67   awt->GetDrawingSurface = _Jv_GetDrawingSurface;
  68   awt->FreeDrawingSurface = _Jv_FreeDrawingSurface;
  69   awt->Lock = _Jv_AWTLock;
  70   awt->Unlock = _Jv_AWTUnlock;
  71
  72   return JNI_TRUE;
  73 }
  74
  75 /* JAWT_DrawingSurface functions */
  76
  77 static jint
  78 (JNICALL _Jv_Lock) (JAWT_DrawingSurface* surface)
  79 {
  80   return classpath_jawt_object_lock (surface->lock);
  81 }
  82
  83 static void
  84 (JNICALL _Jv_Unlock) (JAWT_DrawingSurface* surface)
  85 {
  86   classpath_jawt_object_unlock (surface->lock);
  87 }
  88
  89 static JAWT_DrawingSurfaceInfo*
  90 (JNICALL _Jv_GetDrawingSurfaceInfo) (JAWT_DrawingSurface* surface)
  91 {
  92   if (surface == NULL)
  93     return NULL;
  94
  95   return surface->surface_info;
  96 }
  97
  98 static void
  99 (JNICALL _Jv_FreeDrawingSurfaceInfo) (JAWT_DrawingSurfaceInfo* surface_info)
 100 {
 101   JAWT_X11DrawingSurfaceInfo* surface_info_x11;
 102
 103   if (surface_info == NULL)
 104     return;
 105
 106   surface_info_x11 = (JAWT_X11DrawingSurfaceInfo*) surface_info->platformInfo;
 107
 108   surface_info_x11->display = NULL;
 109   surface_info_x11->drawable = 0;
 110   surface_info_x11->visualID = 0;
 111
 112   free (surface_info->platformInfo);
 113   free (surface_info);
 114   surface_info = NULL;
 115 }
 116
 117 /* JAWT functions */
 118
 119 static JAWT_DrawingSurface*
 120 (JNICALL _Jv_GetDrawingSurface) (JNIEnv* env, jobject canvas)
 121 {
 122   JAWT_DrawingSurface* surface;
 123   JAWT_X11DrawingSurfaceInfo* surface_info_x11;
 124
 125   surface = (JAWT_DrawingSurface*) malloc (sizeof (JAWT_DrawingSurface));
 126
 127   if (surface == NULL)
 128     return NULL;
 129
 130   /* initialize function pointers */
 131   surface->GetDrawingSurfaceInfo = _Jv_GetDrawingSurfaceInfo;
 132   surface->FreeDrawingSurfaceInfo = _Jv_FreeDrawingSurfaceInfo;
 133
 134   surface->Lock = _Jv_Lock;
 135   surface->Unlock = _Jv_Unlock;
 136
 137   surface->surface_info = (JAWT_DrawingSurfaceInfo*) malloc (sizeof (JAWT_DrawingSurfaceInfo));
 138
 139   surface->lock = classpath_jawt_create_lock ();
 140
 141   if (surface->surface_info == NULL)
 142     return NULL;
 143
 144   surface->surface_info->platformInfo = malloc (sizeof (JAWT_X11DrawingSurfaceInfo));
 145
 146   if (surface->surface_info->platformInfo == NULL)
 147     return NULL;
 148
 149   surface_info_x11 = (JAWT_X11DrawingSurfaceInfo*) surface->surface_info->platformInfo;
 150
 151   surface_info_x11->display = classpath_jawt_get_default_display (env, canvas);
 152   surface_info_x11->drawable = classpath_jawt_get_drawable (env, canvas);
 153   surface_info_x11->visualID = classpath_jawt_get_visualID (env, canvas);
 154
 155   /* FIXME: also include bounding rectangle of drawing surface */
 156   /* FIXME: also include current clipping region */
 157
 158   return surface;
 159 }
 160
 161 static void
 162 (JNICALL _Jv_FreeDrawingSurface) (JAWT_DrawingSurface* surface)
 163 {
 164   classpath_jawt_destroy_lock (surface->lock);
 165   free (surface);
 166 }
 167
 168 static void
 169 (JNICALL _Jv_AWTLock) (JNIEnv* env)
 170 {
 171   classpath_jawt_lock ();
 172 }
 173
 174 static void
 175 (JNICALL _Jv_AWTUnlock) (JNIEnv* env)
 176 {
 177   classpath_jawt_unlock ();
 178 }
 179