axmol/cocos/platform/android/CCDevice-android.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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****************************************************************************/

#include "platform/CCPlatformConfig.h"
#if CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID

#include "platform/CCDevice.h"
#include <string.h>
#include <android/log.h>
#include <jni.h>
#include "base/ccTypes.h"
#include "platform/android/jni/JniHelper.h"
#include "platform/CCFileUtils.h"

static const std::string helperClassName = "org/cocos2dx/lib/Cocos2dxHelper";

NS_CC_BEGIN

int Device::getDPI()
{
    static int dpi = -1;
    if (dpi == -1)
    {
        dpi = JniHelper::callStaticIntMethod(helperClassName, "getDPI");
    }
    return dpi;
}

void Device::setAccelerometerEnabled(bool isEnabled)
{
    if (isEnabled)
    {
        JniHelper::callStaticVoidMethod(helperClassName, "enableAccelerometer");
    }
    else
    {
        JniHelper::callStaticVoidMethod(helperClassName, "disableAccelerometer");
    }
}

void Device::setAccelerometerInterval(float interval)
{
    JniHelper::callStaticVoidMethod(helperClassName, "setAccelerometerInterval", interval);
}

class BitmapDC
{
public:

    BitmapDC()
    : _width(0)
    , _height(0)
    , _data(nullptr)
    {
    }

    ~BitmapDC(void)
    {
    }

    bool getBitmapFromJavaShadowStroke( const char *text,
                                        int nWidth,
                                        int nHeight,
                                        Device::TextAlign eAlignMask,
                      const FontDefinition& textDefinition )
    {
           JniMethodInfo methodInfo;
           if (! JniHelper::getStaticMethodInfo(methodInfo, "org/cocos2dx/lib/Cocos2dxBitmap", "createTextBitmapShadowStroke",
               "([BLjava/lang/String;IIIIIIIIZFFFFZIIIIFZI)Z"))
           {
               CCLOG("%s %d: error to get methodInfo", __FILE__, __LINE__);
               return false;
           }

           // Do a full lookup for the font path using FileUtils in case the given font name is a relative path to a font file asset,
           // or the path has been mapped to a different location in the app package:
           std::string fullPathOrFontName = textDefinition._fontName;
           if(FileUtils::getInstance()->isFileExist(fullPathOrFontName)) {
               fullPathOrFontName = FileUtils::getInstance()->fullPathForFilename(textDefinition._fontName);
               // If the path name returned includes the 'assets' dir then that needs to be removed, because the android.content.Context
               // requires this portion of the path to be omitted for assets inside the app package.
               if (fullPathOrFontName.find("assets/") == 0)
               {
                   fullPathOrFontName = fullPathOrFontName.substr(strlen("assets/"));   // Chop out the 'assets/' portion of the path.
               }
           }

           /**create bitmap
            * this method call Cococs2dx.createBitmap()(java code) to create the bitmap, the java code
            * will call Java_org_cocos2dx_lib_Cocos2dxBitmap_nativeInitBitmapDC() to init the width, height
            * and data.
            * use this approach to decrease the jni call number
           */
           int count = strlen(text);
           jbyteArray strArray = methodInfo.env->NewByteArray(count);
           methodInfo.env->SetByteArrayRegion(strArray, 0, count, reinterpret_cast<const jbyte*>(text));
           jstring jstrFont = methodInfo.env->NewStringUTF(fullPathOrFontName.c_str());

           if(!methodInfo.env->CallStaticBooleanMethod(methodInfo.classID, methodInfo.methodID, strArray,
               jstrFont, textDefinition._fontSize, textDefinition._fontFillColor.r, textDefinition._fontFillColor.g, 
               textDefinition._fontFillColor.b, textDefinition._fontAlpha,
               eAlignMask, nWidth, nHeight, 
               textDefinition._shadow._shadowEnabled, textDefinition._shadow._shadowOffset.width, -textDefinition._shadow._shadowOffset.height, 
               textDefinition._shadow._shadowBlur, textDefinition._shadow._shadowOpacity, 
               textDefinition._stroke._strokeEnabled, textDefinition._stroke._strokeColor.r, textDefinition._stroke._strokeColor.g, 
                                                       textDefinition._stroke._strokeColor.b, textDefinition._stroke._strokeAlpha, textDefinition._stroke._strokeSize,
                                                       textDefinition._enableWrap, textDefinition._overflow))
           {
                return false;
           }

           methodInfo.env->DeleteLocalRef(strArray);
           methodInfo.env->DeleteLocalRef(jstrFont);
           methodInfo.env->DeleteLocalRef(methodInfo.classID);

           return true;
    }

public:
    int _width;
    int _height;
    unsigned char *_data;
};

static BitmapDC& sharedBitmapDC()
{
    static BitmapDC s_BmpDC;
    return s_BmpDC;
}

Data Device::getTextureDataForText(const char * text, const FontDefinition& textDefinition, TextAlign align, int &width, int &height, bool& hasPremultipliedAlpha)
{
    Data ret;
    do 
    {
        BitmapDC &dc = sharedBitmapDC();

        if(! dc.getBitmapFromJavaShadowStroke(text, 
            (int)textDefinition._dimensions.width, 
            (int)textDefinition._dimensions.height, 
            align, textDefinition )) { break;};

        width = dc._width;
        height = dc._height;
        ret.fastSet(dc._data,width * height * 4);
        hasPremultipliedAlpha = true;
    } while (0);

    return ret;
}

void Device::setKeepScreenOn(bool value)
{
    JniHelper::callStaticVoidMethod(helperClassName, "setKeepScreenOn", value);
}

void Device::vibrate(float duration)
{
    JniHelper::callStaticVoidMethod(helperClassName, "vibrate", duration);
}

NS_CC_END

#endif // CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID

// this method is called by Cocos2dxBitmap
extern "C"
{
    /**
    * this method is called by java code to init width, height and pixels data
    */
    JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxBitmap_nativeInitBitmapDC(JNIEnv*  env, jobject thiz, int width, int height, jbyteArray pixels)
    {
        int size = width * height * 4;
        cocos2d::BitmapDC& bitmapDC = cocos2d::sharedBitmapDC();
        bitmapDC._width = width;
        bitmapDC._height = height;
        bitmapDC._data = (unsigned char*)malloc(sizeof(unsigned char) * size);
        env->GetByteArrayRegion(pixels, 0, size, (jbyte*)bitmapDC._data);
    }
};