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
  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
  54 JNIEXPORT jboolean JNICALL
  55 JAWT_GetAWT (JNIEnv* env, JAWT* awt)
  56 {
  57   jint retrieved_version;
  58
  59   retrieved_version = classpath_jawt_get_awt_version ();
  60
  61   if (awt->version > retrieved_version)
  62     return JNI_FALSE;
  63
  64   awt->GetDrawingSurface = _Jv_GetDrawingSurface;
  65   awt->FreeDrawingSurface = _Jv_FreeDrawingSurface;
  66
  67   return JNI_TRUE;
  68 }
  69
  70 /* JAWT_DrawingSurface functions */
  71
  72 static jint
  73 (JNICALL _Jv_Lock) (JAWT_DrawingSurface* surface)
  74 {
  75   /* lock the drawing surface */
  76   return classpath_jawt_lock ();
  77 }
  78
  79 static void
  80 (JNICALL _Jv_Unlock) (JAWT_DrawingSurface* surface)
  81 {
  82   classpath_jawt_unlock ();
  83 }
  84
  85 static JAWT_DrawingSurfaceInfo*
  86 (JNICALL _Jv_GetDrawingSurfaceInfo) (JAWT_DrawingSurface* surface)
  87 {
  88   if (surface == NULL)
  89     return NULL;
  90
  91   return surface->surface_info;
  92 }
  93
  94 static void
  95 (JNICALL _Jv_FreeDrawingSurfaceInfo) (JAWT_DrawingSurfaceInfo* surface_info)
  96 {
  97   JAWT_X11DrawingSurfaceInfo* surface_info_x11;
  98
  99   if (surface_info == NULL)
 100     return;
 101
 102   surface_info_x11 = (JAWT_X11DrawingSurfaceInfo*) surface_info->platformInfo;
 103
 104   surface_info_x11->display = NULL;
 105   surface_info_x11->drawable = 0;
 106
 107   free (surface_info);
 108   surface_info = NULL;
 109 }
 110
 111 /* JAWT functions */
 112
 113 static JAWT_DrawingSurface*
 114 (JNICALL _Jv_GetDrawingSurface) (JNIEnv* env, jobject canvas)
 115 {
 116   JAWT_DrawingSurface* surface;
 117   JAWT_X11DrawingSurfaceInfo* surface_info_x11;
 118
 119   surface = (JAWT_DrawingSurface*) malloc (sizeof (JAWT_DrawingSurface));
 120
 121   if (surface == NULL)
 122     return NULL;
 123
 124   /* initialize function pointers */
 125   surface->GetDrawingSurfaceInfo = _Jv_GetDrawingSurfaceInfo;
 126   surface->FreeDrawingSurfaceInfo = _Jv_FreeDrawingSurfaceInfo;
 127
 128   surface->Lock = _Jv_Lock;
 129   surface->Unlock = _Jv_Unlock;
 130
 131   surface->surface_info = (JAWT_DrawingSurfaceInfo*) malloc (sizeof (JAWT_DrawingSurfaceInfo));
 132
 133   if (surface->surface_info == NULL)
 134     return NULL;
 135
 136   surface->surface_info->platformInfo = malloc (sizeof (JAWT_X11DrawingSurfaceInfo));
 137
 138   if (surface->surface_info->platformInfo == NULL)
 139     return NULL;
 140
 141   surface_info_x11 = (JAWT_X11DrawingSurfaceInfo*) surface->surface_info->platformInfo;
 142
 143   surface_info_x11->display = classpath_jawt_get_default_display (env, canvas);
 144   surface_info_x11->drawable = classpath_jawt_get_drawable (env, canvas);
 145
 146   /* FIXME: also include bounding rectangle of drawing surface */
 147   /* FIXME: also include current clipping region */
 148
 149   return surface;
 150 }
 151
 152 static void
 153 (JNICALL _Jv_FreeDrawingSurface) (JAWT_DrawingSurface* surface)
 154 {
 155   free (surface);
 156 }