axmol/cocos2dx/platform/android/CCXBitmapDC.cpp

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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****************************************************************************/
#include <cstring>
#include "CCXBitmapDC.h"
#include "CCXApplication_android.h"
#include "CCDirector.h"
#include "platform/platform.h"

#include <android/log.h>
#include <android/bitmap.h>
#include <string.h>
#include <jni.h>

namespace cocos2d {

	CCXBitmapDC::CCXBitmapDC()
	{
		m_nWidth = 0;
		m_nHeight = 0;
		data = NULL;
	}
	
	CCXBitmapDC::CCXBitmapDC(const char *text, CGSize dimensions, UITextAlignment alignment, const char *fontName, float fontSize)
	{
		m_nWidth = 0;
		m_nHeight = 0;
		data = NULL;
		
		getBitmapFromJava(text, fontSize);
	}
	
	CCXBitmapDC::~CCXBitmapDC()
	{
		if (data)
		{
			delete[] data;
		}
	}
	
	int CCXBitmapDC::getWidth()
    {
    	return m_nWidth;
    }
    
    int CCXBitmapDC::getHeight()
    {
    	return m_nHeight;
    }
    
    unsigned char* CCXBitmapDC::getData()
    {
    	return data;
    }
	
	void CCXBitmapDC::getBitmapFromJava(const char *text, float fontSize)
	{
		JNIEnv *env;
		if (gJavaVM->GetEnv((void**)&env, JNI_VERSION_1_4) <0 )
		{
			if (gJavaVM->AttachCurrentThread(&env, NULL) < 0)
			{
				return;
			}
		}
		
		//__android_log_write(ANDROID_LOG_DEBUG, "cocos2d::CCXBitmapDC", "get env");
		
		jclass mClass = env->FindClass("org/cocos2dx/lib/Cocos2dxJNI");
		if (! mClass)
		{
			__android_log_write(ANDROID_LOG_DEBUG, "cocos2d::CCXBitmapDC", "can not find org.cocos2dx.Cocos2dJNI");
			return;
		}
		
		jmethodID mid = env->GetStaticMethodID(mClass, "createTextBitmap", "(Ljava/lang/String;I)Landroid/graphics/Bitmap;");
	    if (! mid)
	    {
	    	__android_log_write(ANDROID_LOG_DEBUG, "cocos2d::CCXBitmapDC", "can not find method createTextBitmap");
	    	return;
	    }
	    
	    jobject bitmap = env->CallStaticObjectMethod(mClass, mid, env->NewStringUTF(text), (int)fontSize);
	    
	    AndroidBitmapInfo  info;
	    if (AndroidBitmap_getInfo(env, bitmap, &info) < 0) 
	    {
            __android_log_write(ANDROID_LOG_DEBUG, "cocos2d::CCXBitmapDC", "failed to get bitmapinfo");
            return;
        }
                
        void *pixels;
        if (AndroidBitmap_lockPixels(env, bitmap, &pixels) < 0) 
        {
            __android_log_write(ANDROID_LOG_DEBUG, "cocos2d::CCXBitmapDC", "AndroidBitmap_lockPixels() failed !");
        }
        
        // get data
        data = new unsigned char[info.width * info.height * 4];
        if (! data)
        {
        	AndroidBitmap_unlockPixels(env, bitmap);
        	__android_log_write(ANDROID_LOG_DEBUG, "cocos2d::CCXBitmapDC", "failed to allocate memory");
        	return;
        }
        
        memcpy(data, pixels, info.width * info.height * 4);
        AndroidBitmap_unlockPixels(env, bitmap);
        
        // swap data
        unsigned int *tempPtr = (unsigned int*)data;
        unsigned int tempdata = 0;
        for (int i = 0; i < info.height; ++i)
        {
        	for (int j = 0; j < info.width; ++j)
        	{
        		tempdata = *tempPtr;
        		*tempPtr++ = swapAlpha(tempdata);
        	}
        }
        
        m_nWidth = info.width;
        m_nHeight =info.height;
        
        //__android_log_print(ANDROID_LOG_DEBUG, "cocos2d::CCXBitmapDC", "width: %d, height:%d", m_nWidth, m_nHeight);
	}
	
	unsigned int CCXBitmapDC::swapAlpha(unsigned int value)
	{
		return ((value << 8 & 0xffffff00) | (value >> 24 & 0x000000ff));
	}
}