// Copyright (c) 2014 The Chromium Embedded Framework Authors. All rights

// reserved. Use of this source code is governed by a BSD-style license that

// can be found in the LICENSE file.

#include "jni_util.h"

#include <assert.h>

#include <jawt.h>

#include <jawt_md.h>

unsigned long GetDrawableOfCanvas(jobject canvas, JNIEnv* env) {

JAWT awt;

JAWT_DrawingSurface* ds;

JAWT_DrawingSurfaceInfo* dsi;

JAWT_X11DrawingSurfaceInfo* dsi_x11;

jint lock;

// Get the AWT.

awt.version = JAWT_VERSION_1_4;

JAWT_GetAWT(env, &awt);

// Get the drawing surface.

ds = awt.GetDrawingSurface(env, canvas);

assert(ds != nullptr);

// Lock the drawing surface.

// May fail during shutdown.

lock = ds->Lock(ds);

if (lock & JAWT_LOCK_ERROR) {

return 0;

}

// Get the drawing surface info.

dsi = ds->GetDrawingSurfaceInfo(ds);

if (dsi == nullptr) {

// Unlock the drawing surface

ds->Unlock(ds);

return 0;

}

// Get the platform-specific drawing info.

dsi_x11 = (JAWT_X11DrawingSurfaceInfo*)dsi->platformInfo;

Drawable result = dsi_x11->drawable;

// Free the drawing surface info

ds->FreeDrawingSurfaceInfo(dsi);

// Unlock the drawing surface

ds->Unlock(ds);

// Free the drawing surface

awt.FreeDrawingSurface(ds);

return result;

}