android中位图中蓝色和红色通道的交互更改

我使用以下代码从位图中获取像素数据，然后通过JNI将数组传递给cocos2dx。在cocos2d-x中渲染图像时，红色通道和蓝色通道反转。有没有一种方法可以分别从像素的int值访问红色和蓝色通道，然后相互更改它们

JAVA代码

    int[] pixels = new int[bitmap.getWidth() * bitmap.getHeight()];
    bitmap.getPixels(pixels, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
    int len = bitmap.getWidth() * bitmap.getHeight();
    onFacebookImageNative(pixels, len, bitmap.getWidth(), bitmap.getHeight(), bitsPerComponent);

JNIEXPORT void JNICALL Java_com_xxxx_yyyyo_yyyyo_onFacebookImageNative(JNIEnv* env, jobject,
    jintArray pixels, jint dataLen, jint width, jint height, jint bitsPerComponent)
{
yyyyo *yyyyo = yyyyo::singleton();

jint *jArr = env->GetIntArrayElements(pixels, NULL);
int pixelsInt[dataLen];
for (int i=0; i<dataLen; i++){
    pixelsInt[i] = (int)jArr[i];
}

yyyyo->onFacebookImage(pixelsInt, (int) dataLen,
        CCImage::kFmtRawData, (int) width, (int) height, (int) bitsPerComponent);
}

    int[] pixels = new int[bitmap.getWidth() * bitmap.getHeight()];
    bitmap.getPixels(pixels, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());

    int[] finalArray = new int[bitmap.getWidth() * bitmap.getHeight()];

    for(int i = 0; i < len; i++) {

    int red = Color.red(pixels[i]);
    int green = Color.green(pixels[i]);
    int blue = Color.blue(pixels[i]);
    finalArray[i] = Color.rgb(blue, green, red);//invert sequence here.
    }


    int len = bitmap.getWidth() * bitmap.getHeight();
    onFacebookImageNative(pixels, len, bitmap.getWidth(), bitmap.getHeight(), bitsPerComponent);

JNI代码

    int[] pixels = new int[bitmap.getWidth() * bitmap.getHeight()];
    bitmap.getPixels(pixels, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
    int len = bitmap.getWidth() * bitmap.getHeight();
    onFacebookImageNative(pixels, len, bitmap.getWidth(), bitmap.getHeight(), bitsPerComponent);

JNIEXPORT void JNICALL Java_com_xxxx_yyyyo_yyyyo_onFacebookImageNative(JNIEnv* env, jobject,
    jintArray pixels, jint dataLen, jint width, jint height, jint bitsPerComponent)
{
yyyyo *yyyyo = yyyyo::singleton();

jint *jArr = env->GetIntArrayElements(pixels, NULL);
int pixelsInt[dataLen];
for (int i=0; i<dataLen; i++){
    pixelsInt[i] = (int)jArr[i];
}

yyyyo->onFacebookImage(pixelsInt, (int) dataLen,
        CCImage::kFmtRawData, (int) width, (int) height, (int) bitsPerComponent);
}

    int[] pixels = new int[bitmap.getWidth() * bitmap.getHeight()];
    bitmap.getPixels(pixels, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());

    int[] finalArray = new int[bitmap.getWidth() * bitmap.getHeight()];

    for(int i = 0; i < len; i++) {

    int red = Color.red(pixels[i]);
    int green = Color.green(pixels[i]);
    int blue = Color.blue(pixels[i]);
    finalArray[i] = Color.rgb(blue, green, red);//invert sequence here.
    }


    int len = bitmap.getWidth() * bitmap.getHeight();
    onFacebookImageNative(pixels, len, bitmap.getWidth(), bitmap.getHeight(), bitsPerComponent);

JNIEXPORT void JNICALL Java_com_xxxx_yyyyyo_yyyyo_onfacebookmagenative（JNIEnv*env，jobject，
jint阵列像素、jint数据长度、jint宽度、jint高度、jint比特组件）
{
yyyyo*yyyyo=yyyyo:：singleton（）；
jint*jArr=env->GetIntArrayElements（像素，空）；
int pixelsInt[dataLen]；
对于（int i=0；ionFacebookImage（像素）（int）dataLen，
CCImage:：kFmtRawData，（int）宽度，（int）高度，（int）位组件）；
}

好吧，也许我问这个问题太早了，但没有尽力

JAVA代码

    int[] pixels = new int[bitmap.getWidth() * bitmap.getHeight()];
    bitmap.getPixels(pixels, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
    int len = bitmap.getWidth() * bitmap.getHeight();
    onFacebookImageNative(pixels, len, bitmap.getWidth(), bitmap.getHeight(), bitsPerComponent);

JNIEXPORT void JNICALL Java_com_xxxx_yyyyo_yyyyo_onFacebookImageNative(JNIEnv* env, jobject,
    jintArray pixels, jint dataLen, jint width, jint height, jint bitsPerComponent)
{
yyyyo *yyyyo = yyyyo::singleton();

jint *jArr = env->GetIntArrayElements(pixels, NULL);
int pixelsInt[dataLen];
for (int i=0; i<dataLen; i++){
    pixelsInt[i] = (int)jArr[i];
}

yyyyo->onFacebookImage(pixelsInt, (int) dataLen,
        CCImage::kFmtRawData, (int) width, (int) height, (int) bitsPerComponent);
}

    int[] pixels = new int[bitmap.getWidth() * bitmap.getHeight()];
    bitmap.getPixels(pixels, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());

    int[] finalArray = new int[bitmap.getWidth() * bitmap.getHeight()];

    for(int i = 0; i < len; i++) {

    int red = Color.red(pixels[i]);
    int green = Color.green(pixels[i]);
    int blue = Color.blue(pixels[i]);
    finalArray[i] = Color.rgb(blue, green, red);//invert sequence here.
    }


    int len = bitmap.getWidth() * bitmap.getHeight();
    onFacebookImageNative(pixels, len, bitmap.getWidth(), bitmap.getHeight(), bitsPerComponent);

int[]像素=新的int[bitmap.getWidth（）*bitmap.getHeight（）]；
getPixels（像素，0，bitmap.getWidth（），0，0，bitmap.getWidth（），bitmap.getHeight（））；
int[]finalArray=new int[bitmap.getWidth（）*bitmap.getHeight（）]；
对于（int i=0；i

---

如果有人有一个更好的答案，不需要迭代每个像素，请在这里分享。

虽然有点晚，但我会回答。你可以使用ColorMatrix将所有蓝色转换为红色，反之亦然，然后使用该ColorMatrix将原始图像绘制为空图像。