Android: Extract data for native style on startup

When Ministro is not in use, we need to extract style
information on startup in order for the native Android style
to work.

The code to extract data from the device is contributed from
the Ministro project.

[ChangeLog][Android] Enable using native style also when
Ministro deployment mechanism is not in use.

Task-number: QTBUG-36019
Change-Id: I2afef5219b4e8fbb2f3e387cbc5e570da1f41011
Reviewed-by: BogDan Vatra <bogdan@kde.org>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

2 files changed, 140 insertions, 2 deletions

diff --git a/src/plugins/platforms/android/android.pro b/src/plugins/platforms/android/android.pro
index 243eea071a..32c37ab17a 100644
--- a/src/plugins/platforms/android/android.pro
+++ b/src/plugins/platforms/android/android.pro
@@ -21,7 +21,9 @@ CONFIG += qpa/genericunixfontdatabase
 
 OTHER_FILES += $$PWD/android.json
 
-INCLUDEPATH += $$PWD
+INCLUDEPATH += \
+    $$PWD \
+    $$QT_SOURCE_TREE/src/3rdparty/android
 
 SOURCES += $$PWD/androidplatformplugin.cpp \
            $$PWD/androidjnimain.cpp \
@@ -48,7 +50,8 @@ SOURCES += $$PWD/androidplatformplugin.cpp \
            $$PWD/qandroidplatformrasterwindow.cpp \
            $$PWD/qandroidplatformbackingstore.cpp \
            $$PWD/qandroidplatformopenglcontext.cpp \
-           $$PWD/qandroidplatformforeignwindow.cpp
+           $$PWD/qandroidplatformforeignwindow.cpp \
+           $$PWD/extract.cpp
 
 HEADERS += $$PWD/qandroidplatformintegration.h \
            $$PWD/androidjnimain.h \
diff --git a/src/plugins/platforms/android/extract.cpp b/src/plugins/platforms/android/extract.cpp
new file mode 100644
index 0000000000..82687e61a7
--- /dev/null
+++ b/src/plugins/platforms/android/extract.cpp
@@ -0,0 +1,135 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 BogDan Vatra <bogdan@kde.org>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+
+#include <jni.h>
+#include <android/log.h>
+#include <extract.h>
+#include <alloca.h>
+
+#define LOG_TAG    "extractSyleInfo"
+#define LOGI(...)  __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)
+#define LOGE(...)  __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
+#define LOGF(...)  __android_log_print(ANDROID_LOG_FATAL,LOG_TAG,__VA_ARGS__)
+
+extern "C" JNIEXPORT jintArray JNICALL Java_org_qtproject_qt5_android_ExtractStyle_extractNativeChunkInfo(JNIEnv * env, jobject, Res_png_9patch* chunk)
+{
+        Res_png_9patch::deserialize(chunk);
+        //printChunkInformation(chunk);
+        jintArray result;
+        size_t size = 3+chunk->numXDivs+chunk->numYDivs+chunk->numColors;
+        result = env->NewIntArray(size);
+        if (!result)
+            return 0;
+
+        jint *data = (jint*)malloc(sizeof(jint)*size);
+        size_t pos = 0;
+        data[pos++]=chunk->numXDivs;
+        data[pos++]=chunk->numYDivs;
+        data[pos++]=chunk->numColors;
+        for (int x = 0; x <chunk->numXDivs; x ++)
+            data[pos++]=chunk->xDivs[x];
+        for (int y = 0; y <chunk->numYDivs; y ++)
+            data[pos++]=chunk->yDivs[y];
+        for (int c = 0; c <chunk->numColors; c ++)
+            data[pos++]=chunk->colors[c];
+        env->SetIntArrayRegion(result, 0, size, data);
+        free(data);
+        return result;
+}
+
+extern "C" JNIEXPORT jintArray JNICALL Java_org_qtproject_qt5_android_ExtractStyle_extractChunkInfo(JNIEnv * env, jobject  obj, jbyteArray chunkObj)
+{
+        size_t chunkSize = env->GetArrayLength(chunkObj);
+        void* storage = alloca(chunkSize);
+        env->GetByteArrayRegion(chunkObj, 0, chunkSize,
+                                reinterpret_cast<jbyte*>(storage));
+
+        if (!env->ExceptionCheck())
+            return Java_org_qtproject_qt5_android_ExtractStyle_extractNativeChunkInfo(env, obj, static_cast<Res_png_9patch*>(storage));
+        else
+            env->ExceptionClear();
+        return 0;
+}
+
+// The following part was shamelessly stolen from ResourceTypes.cpp from Android's sources
+/*
+ * Copyright (C) 2005 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+static void deserializeInternal(const void* inData, Res_png_9patch* outData) {
+    char* patch = (char*) inData;
+    if (inData != outData) {
+        memmove(&outData->wasDeserialized, patch, 4);     // copy  wasDeserialized, numXDivs, numYDivs, numColors
+        memmove(&outData->paddingLeft, patch + 12, 4);     // copy  wasDeserialized, numXDivs, numYDivs, numColors
+    }
+    outData->wasDeserialized = true;
+    char* data = (char*)outData;
+    data +=  sizeof(Res_png_9patch);
+    outData->xDivs = (int32_t*) data;
+    data +=  outData->numXDivs * sizeof(int32_t);
+    outData->yDivs = (int32_t*) data;
+    data +=  outData->numYDivs * sizeof(int32_t);
+    outData->colors = (uint32_t*) data;
+}
+
+Res_png_9patch* Res_png_9patch::deserialize(const void* inData)
+{
+    if (sizeof(void*) != sizeof(int32_t)) {
+        LOGE("Cannot deserialize on non 32-bit system\n");
+        return NULL;
+    }
+    deserializeInternal(inData, (Res_png_9patch*) inData);
+    return (Res_png_9patch*) inData;
+}