在使用cocos2d-x發(fā)布Android平臺(tái)游戲時(shí)，游戲中可能需要顯示中文字體， 或者想顯示漂亮的自定義字體,這怎么辦呢？
cocos2d-x中字體標(biāo)簽提供了CCLabelAtlas, CCLabelBMFont CCLabelTTF
1.CCLabelAtlas速度快，支持簡(jiǎn)單有限的幾個(gè)字符或數(shù)字集合
2.CCLabelBMFont
我們可以用CCLabelBMFont來(lái)加載字體編輯器生成的.plist文件，但是當(dāng)顯示的文字很多時(shí)，這種做法就有點(diǎn)費(fèi)時(shí)費(fèi)力了
如：我們想顯示游戲中劇情介紹
3.CCLabelTTF
支持選擇一種字體來(lái)顯示文字，但是只支持系統(tǒng)中默認(rèn)字體
CCLabelTTF* pLabel = CCLabelTTF::create("Hello World", "Arial", 24);
問(wèn)題：我們?cè)贏ndroid游戲中想顯示游戲劇情，想用自己指定的一種字體gril.ttf(非系統(tǒng)默認(rèn)字體),怎么辦其實(shí)cocos2d-x已經(jīng)提供了幫我們實(shí)現(xiàn)了
構(gòu)造CCLabelTTF中指定的字體名傳給了
CCTexture2D void CCLabelTTF::updateTexture()
{
CCTexture2D *tex;
if (m_tDimensions.width == 0 || m_tDimensions.height == 0)
{
tex =
new CCTexture2D();
tex->initWithString(m_string.c_str(),
m_pFontName->c_str(), m_fFontSize * CC_CONTENT_SCALE_FACTOR()) ;
}
else {
tex =
new CCTexture2D();
tex->initWithString(m_string.c_str(),
CC_SIZE_POINTS_TO_PIXELS(m_tDimensions),
m_hAlignment,
m_vAlignment,
m_pFontName->c_str(),
m_fFontSize * CC_CONTENT_SCALE_FACTOR());
}
.
}
CCTexture2D又將字體名傳給了CCImage
(PS:這里調(diào)用的是android平臺(tái)下的CCImage類(./platform/android/CCImage.h)
而不是win32平臺(tái)下的CCImage類(./platform/win32/CCImage.h) )
android平臺(tái)下的CCImage
bool CCImage::initWithString(
const char * pText,
int nWidth/* = 0*/,
int nHeight/* = 0*/,
ETextAlign eAlignMask/* = kAlignCenter*/,
const char * pFontName/* = nil*/,
int nSize/* = 0*/)
{
bool bRet = false;
do
{
CC_BREAK_IF(! pText);
BitmapDC &dc = sharedBitmapDC();
CC_BREAK_IF(! dc.getBitmapFromJava(pText, nWidth, nHeight, eAlignMask, pFontName, nSize));
// assign the dc.m_pData to m_pData in order to save time
m_pData = dc.m_pData;
CC_BREAK_IF(! m_pData);
m_nWidth = (short)dc.m_nWidth;
m_nHeight = (short)dc.m_nHeight;
m_bHasAlpha = true;
m_bPreMulti = true;
m_nBitsPerComponent = 8;
bRet = true;
} while (0);
return bRet;
}
然后調(diào)用了android平臺(tái)下的BitmapDC
bool getBitmapFromJava(
const char *text,
int nWidth,
int nHeight, CCImage::ETextAlign eAlignMask,
const char * pFontName,
float fontSize)
{
JniMethodInfo methodInfo;
if (! JniHelper::getStaticMethodInfo(methodInfo, "
org/cocos2dx/lib/Cocos2dxBitmap", "
createTextBitmap",
"(Ljava/lang/String;Ljava/lang/String;IIII)V"))
{
CCLOG("%s %d: error to get methodInfo", __FILE__, __LINE__);
return false;
}
}
這里顯示了調(diào)用JAVA代碼
Cocos2dxBitmap.java下的
createTextBitmap函數(shù)
/*
* @width: the width to draw, it can be 0
* @height: the height to draw, it can be 0
*/
public static void createTextBitmap(String content, String fontName,
int fontSize, int alignment, int width, int height){
content = refactorString(content);
Paint paint = newPaint(fontName, fontSize, alignment);
TextProperty textProperty = computeTextProperty(content, paint, width, height);
int bitmapTotalHeight = (height == 0 ? textProperty.totalHeight:height);
// Draw text to bitmap
Bitmap bitmap = Bitmap.createBitmap(textProperty.maxWidth,
bitmapTotalHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
// Draw string
FontMetricsInt fm = paint.getFontMetricsInt();
int x = 0;
int y = computeY(fm, height, textProperty.totalHeight, alignment);
String[] lines = textProperty.lines;
for (String line : lines){
x = computeX(paint, line, textProperty.maxWidth, alignment);
canvas.drawText(line, x, y, paint);
y += textProperty.heightPerLine;
}
initNativeObject(bitmap);
}
在
newPaint函數(shù)中調(diào)用了字體加載
private static Paint newPaint(String fontName, int fontSize, int alignment){
Paint paint = new Paint();
paint.setColor(Color.WHITE);
paint.setTextSize(fontSize);
paint.setAntiAlias(true);
/*
* Set type face for paint, now it support .ttf file.
*/
if (fontName.endsWith(".ttf")){ //字體需要.ttf結(jié)束
try {
//Typeface typeFace = Typeface.createFromAsset(context.getAssets(), fontName);
Typeface typeFace = Cocos2dxTypefaces.get(context, fontName);
paint.setTypeface(typeFace);
} catch (Exception e){
Log.e("Cocos2dxBitmap",
"error to create ttf type face: " + fontName);
/*
* The file may not find, use system font
*/
paint.setTypeface(Typeface.create(fontName, Typeface.NORMAL));
}
}
else {
paint.setTypeface(Typeface.create(fontName, Typeface.NORMAL));
}
.......
return paint;
}
（PS:Typeface類定義字體和字體內(nèi)在的類型。這個(gè)類被用在畫(huà)筆Paint設(shè)置的時(shí)候，比如用textSize,textSkewX和textScale設(shè)置來(lái)指定text在畫(huà)的時(shí)候如何來(lái)顯示和測(cè)量。
android中用Typeface來(lái)指定字體）
另一點(diǎn)需要注意的是：字體需要.ttf結(jié)束
使用方法：
1.在proj.android\assets文件夾中添加
girl.ttf2.程序中調(diào)用對(duì)應(yīng)的字體就可以了
CCSize size = CCDirector::sharedDirector()->getWinSize();
CCLabelTTF* label = CCLabelTTF::create("少女HelloWorld", "girl.ttf", 24);
label->setPosition(ccp(size.width/2, size.height/2));
addChild(label);
3.如果你需要顯示漢字，則需要將包含有字符串的文件(如.cpp)轉(zhuǎn)換為UTF-8格式編碼，否則會(huì)顯示亂碼
IOS和win32平臺(tái)沒(méi)有測(cè)試，相信的差不多
附上測(cè)試圖片：
哈哈 可以在游戲中打包自己想要的字體啦
posted on 2012-10-15 16:58
風(fēng)輕云淡 閱讀(14764)
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