From 77d55905b1ee712d09e0e3ce7d6ddde46bde4cf5 Mon Sep 17 00:00:00 2001
From: Alexandre Julliard <julliard@winehq.org>
Date: Wed, 31 May 2017 11:47:49 +0200
Subject: [PATCH] wineandroid: Register a JNI callback for reporting desktop
 size changes.

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
---
 dlls/wineandroid.drv/android.h | 13 +++++++
 dlls/wineandroid.drv/init.c    | 68 ++++++++++++++++++++++++++++++++++
 dlls/wineandroid.drv/window.c  | 11 ++++++
 3 files changed, 92 insertions(+)

diff --git a/dlls/wineandroid.drv/android.h b/dlls/wineandroid.drv/android.h
index 7c708f3699..ab4a431cc3 100644
--- a/dlls/wineandroid.drv/android.h
+++ b/dlls/wineandroid.drv/android.h
@@ -25,6 +25,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <jni.h>
+#include <android/log.h>
 
 #include "windef.h"
 #include "winbase.h"
@@ -33,6 +34,15 @@
 #include "wine/gdi_driver.h"
 
 
+/**************************************************************************
+ * Android interface
+ */
+
+#define DECL_FUNCPTR(f) extern typeof(f) * p##f DECLSPEC_HIDDEN
+DECL_FUNCPTR( __android_log_print );
+#undef DECL_FUNCPTR
+
+
 /**************************************************************************
  * USER driver
  */
@@ -44,6 +54,9 @@ extern MONITORINFOEXW default_monitor DECLSPEC_HIDDEN;
 
 extern void init_monitors( int width, int height ) DECLSPEC_HIDDEN;
 
+/* JNI entry points */
+extern void desktop_changed( JNIEnv *env, jobject obj, jint width, jint height ) DECLSPEC_HIDDEN;
+
 extern JavaVM *wine_get_java_vm(void);
 extern jobject wine_get_java_object(void);
 
diff --git a/dlls/wineandroid.drv/init.c b/dlls/wineandroid.drv/init.c
index 3a3ce80b5b..406edf911d 100644
--- a/dlls/wineandroid.drv/init.c
+++ b/dlls/wineandroid.drv/init.c
@@ -385,3 +385,71 @@ const struct gdi_dc_funcs * CDECL ANDROID_get_gdi_driver( unsigned int version )
     }
     return &android_drv_funcs;
 }
+
+
+static const JNINativeMethod methods[] =
+{
+    { "wine_desktop_changed", "(II)V", desktop_changed },
+};
+
+#define DECL_FUNCPTR(f) typeof(f) * p##f = NULL
+#define LOAD_FUNCPTR(lib, func) do { \
+    if ((p##func = wine_dlsym( lib, #func, NULL, 0 )) == NULL) \
+        { ERR( "can't find symbol %s\n", #func); return; } \
+    } while(0)
+
+DECL_FUNCPTR( __android_log_print );
+
+static void load_android_libs(void)
+{
+    void *liblog;
+    char error[1024];
+
+    if (!(liblog = wine_dlopen( "liblog.so", RTLD_GLOBAL, error, sizeof(error) )))
+    {
+        ERR( "failed to load liblog.so: %s\n", error );
+        return;
+    }
+    LOAD_FUNCPTR( liblog, __android_log_print );
+}
+
+#undef DECL_FUNCPTR
+#undef LOAD_FUNCPTR
+
+static BOOL process_attach(void)
+{
+    jclass class;
+    jobject object = wine_get_java_object();
+    JNIEnv *jni_env;
+    JavaVM *java_vm;
+
+    if ((java_vm = wine_get_java_vm()))  /* running under Java */
+    {
+#ifdef __i386__
+        WORD old_fs = wine_get_fs();
+#endif
+        load_android_libs();
+        (*java_vm)->AttachCurrentThread( java_vm, &jni_env, 0 );
+        class = (*jni_env)->GetObjectClass( jni_env, object );
+        (*jni_env)->RegisterNatives( jni_env, class, methods, sizeof(methods)/sizeof(methods[0]) );
+        (*jni_env)->DeleteLocalRef( jni_env, class );
+#ifdef __i386__
+        wine_set_fs( old_fs );  /* the Java VM hijacks %fs for its own purposes, restore it */
+#endif
+    }
+    return TRUE;
+}
+
+/***********************************************************************
+ *       dll initialisation routine
+ */
+BOOL WINAPI DllMain( HINSTANCE inst, DWORD reason, LPVOID reserved )
+{
+    switch (reason)
+    {
+    case DLL_PROCESS_ATTACH:
+        DisableThreadLibraryCalls( inst );
+        return process_attach();
+    }
+    return TRUE;
+}
diff --git a/dlls/wineandroid.drv/window.c b/dlls/wineandroid.drv/window.c
index f8744587ed..e7c83b09b0 100644
--- a/dlls/wineandroid.drv/window.c
+++ b/dlls/wineandroid.drv/window.c
@@ -133,6 +133,17 @@ static void release_win_data( struct android_win_data *data )
 }
 
 
+/***********************************************************************
+ *           desktop_changed
+ *
+ * JNI callback, runs in the context of the Java thread.
+ */
+void desktop_changed( JNIEnv *env, jobject obj, jint width, jint height )
+{
+    p__android_log_print( ANDROID_LOG_INFO, "wine", "desktop_changed: %ux%u", width, height );
+}
+
+
 /***********************************************************************
  *           ANDROID_DestroyWindow
  */