Android JNI Bitmap指定颜色值替换

#include <jni.h>
#include <string>
#include <android/bitmap.h>
#include <cmath>
#include <android/log.h>
//定义TAG之后，我们可以在LogCat通过TAG过滤出NDK打印的日志
#define TAG "BitmapOperationNative"
// 定义info信息
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO,TAG,__VA_ARGS__)void operationBitmap(JNIEnv *env, jobject bitmap, int srcColor, int dstColor) {int result;// 获取源Bitmap相关信息：宽、高等AndroidBitmapInfo sourceInfo;result = AndroidBitmap_getInfo(env, bitmap, &sourceInfo);if (result < 0) {LOGI(" AndroidBitmap_getInfo result=%d ", result);return;}LOGI(" AndroidBitmapInfo format=%d srcColor=%x dstColor=%x", sourceInfo.format, srcColor,dstColor);// 获取源Bitmap像素数据 这里用的是32位的int类型 argb每个8位uint32_t *sourceData;//锁定像素的地址（不锁定的话地址可能会发生改变）result = AndroidBitmap_lockPixels(env, bitmap, (void **) &sourceData);if (result < 0) {LOGI(" AndroidBitmap_lockPixels result=%d ", result);return;}// 遍历各个像素点int color;int red, green, blue, alpha;int width = sourceInfo.width;int height = sourceInfo.height;int w, h;for (h = 0; h < height; h++) {for (w = 0; w < width; w++) {color = sourceData[h * width + w];if (color == srcColor) {sourceData[h * width + w] = dstColor;}}}AndroidBitmap_unlockPixels(env, bitmap);
}extern "C"
JNIEXPORT void JNICALL
Java_com_istep_bitmap_BitmapOperationNative_convertTo(JNIEnv *env, jclass clazz, jobject bitmap,jint src, jint dst) {operationBitmap(env, bitmap, src, dst);
}