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‎app/.gitignore

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/build

‎app/app.iml

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<?xml version="1.0" encoding="UTF-8"?>
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<module external.linked.project.path="C:\Users\Rose\Desktop\ImageBlurring\app" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" external.system.module.group="ImageBlurring" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
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<component name="FacetManager">
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<facet type="android-gradle" name="Android-Gradle">
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<configuration>
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<option name="GRADLE_PROJECT_PATH" value=":app" />
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</configuration>
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</facet>
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<facet type="android" name="Android">
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<configuration>
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<option name="SELECTED_BUILD_VARIANT" value="debug" />
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<option name="ASSEMBLE_TASK_NAME" value="assembleDebug" />
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<option name="COMPILE_JAVA_TASK_NAME" value="compileDebugJava" />
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<option name="ASSEMBLE_TEST_TASK_NAME" value="assembleDebugTest" />
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<option name="SOURCE_GEN_TASK_NAME" value="generateDebugSources" />
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<option name="ALLOW_USER_CONFIGURATION" value="false" />
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<option name="MANIFEST_FILE_RELATIVE_PATH" value="/src/main/AndroidManifest.xml" />
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<option name="RES_FOLDER_RELATIVE_PATH" value="/src/main/res" />
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<option name="RES_FOLDERS_RELATIVE_PATH" value="file://$MODULE_DIR$/src/main/res" />
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<option name="ASSETS_FOLDER_RELATIVE_PATH" value="/src/main/assets" />
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</configuration>
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</facet>
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</component>
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<component name="NewModuleRootManager" inherit-compiler-output="false">
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<output url="file://$MODULE_DIR$/build/classes/debug" />
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<exclude-output />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/build/source/r/debug" isTestSource="false" generated="true" />
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<sourceFolder url="file://$MODULE_DIR$/build/source/aidl/debug" isTestSource="false" generated="true" />
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<sourceFolder url="file://$MODULE_DIR$/build/source/buildConfig/debug" isTestSource="false" generated="true" />
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<sourceFolder url="file://$MODULE_DIR$/build/source/rs/debug" isTestSource="false" generated="true" />
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<sourceFolder url="file://$MODULE_DIR$/build/res/rs/debug" type="java-resource" />
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<sourceFolder url="file://$MODULE_DIR$/build/source/r/test/debug" isTestSource="true" generated="true" />
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<sourceFolder url="file://$MODULE_DIR$/build/source/aidl/test/debug" isTestSource="true" generated="true" />
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<sourceFolder url="file://$MODULE_DIR$/build/source/buildConfig/test/debug" isTestSource="true" generated="true" />
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<sourceFolder url="file://$MODULE_DIR$/build/source/rs/test/debug" isTestSource="true" generated="true" />
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<sourceFolder url="file://$MODULE_DIR$/build/res/rs/test/debug" type="java-test-resource" />
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<sourceFolder url="file://$MODULE_DIR$/src/debug/res" type="java-resource" />
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<sourceFolder url="file://$MODULE_DIR$/src/debug/resources" type="java-resource" />
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<sourceFolder url="file://$MODULE_DIR$/src/debug/aidl" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/debug/assets" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/debug/java" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/debug/jni" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/debug/rs" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/main/res" type="java-resource" />
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<sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
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<sourceFolder url="file://$MODULE_DIR$/src/main/aidl" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/main/assets" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/main/jni" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/main/rs" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/androidTest/res" type="java-test-resource" />
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<sourceFolder url="file://$MODULE_DIR$/src/androidTest/resources" type="java-test-resource" />
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<sourceFolder url="file://$MODULE_DIR$/src/androidTest/aidl" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/src/androidTest/assets" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/src/androidTest/java" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/src/androidTest/jni" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/src/androidTest/rs" isTestSource="true" />
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<excludeFolder url="file://$MODULE_DIR$/build/apk" />
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<excludeFolder url="file://$MODULE_DIR$/build/assets" />
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<excludeFolder url="file://$MODULE_DIR$/build/bundles" />
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<excludeFolder url="file://$MODULE_DIR$/build/classes" />
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<excludeFolder url="file://$MODULE_DIR$/build/dependency-cache" />
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<excludeFolder url="file://$MODULE_DIR$/build/incremental" />
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<excludeFolder url="file://$MODULE_DIR$/build/libs" />
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<excludeFolder url="file://$MODULE_DIR$/build/manifests" />
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<excludeFolder url="file://$MODULE_DIR$/build/res" />
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<excludeFolder url="file://$MODULE_DIR$/build/symbols" />
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<excludeFolder url="file://$MODULE_DIR$/build/tmp" />
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</content>
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<orderEntry type="jdk" jdkName="Android API 19 Platform" jdkType="Android SDK" />
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<orderEntry type="sourceFolder" forTests="false" />
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<orderEntry type="library" exported="" name="support-v4-19.0.1" level="project" />
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</component>
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</module>
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‎app/build.gradle

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apply plugin: 'android'
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android {
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compileSdkVersion 19
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buildToolsVersion "19.0.0"
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defaultConfig {
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minSdkVersion 16
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targetSdkVersion 19
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versionCode 1
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versionName "1.0"
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}
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buildTypes {
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release {
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runProguard false
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proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
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}
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}
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}
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dependencies {
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compile fileTree(dir: 'libs', include: ['*.jar'])
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compile "com.android.support:support-v4:19.0.+"
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}
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‎app/jni/Android.mk

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LOCAL_PATH := $(call my-dir)
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include $(CLEAR_VARS)
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LOCAL_MODULE := JNI_ImageBlur
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LOCAL_SRC_FILES := com_accumulation_imageblurring_app_jni_ImageBlur.cpp
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LOCAL_LDLIBS := -llog -ljnigraphics
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include $(BUILD_SHARED_LIBRARY)

‎app/jni/Application.mk

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# The ARMv7 is significanly faster due to the use of the hardware FPU
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APP_ABI := armeabi armeabi-v7a
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APP_PLATFORM := android-19

‎app/jni/ImageBlur.cpp

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/*************************************************
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Copyright: Copyright QIUJUER 2013.
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Author: Qiujuer
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Date: 2014-04-18
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Description:实现图片模糊处理
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**************************************************/
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#include<malloc.h>
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#define ABS(a) ((a)<(0)?(-a):(a))
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#define MIN(a,b) ((a)<(b)?(a):(b))
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/*************************************************
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Function: StackBlur(堆栈模糊)
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Description: 使用堆栈方式进行图片像素模糊处理
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Calls: malloc
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Table Accessed: NULL
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Table Updated: NULL
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Input: 像素点集合，图片宽，图片高，模糊半径
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Output: 返回模糊后的像素点集合
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Return: 返回模糊后的像素点集合
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Others: NULL
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*************************************************/
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static int* StackBlur(int* pix, int w, int h, int radius) {
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int wm = w - 1;
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int hm = h - 1;
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int wh = w * h;
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int div = radius + radius + 1;
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int *r = (int *)malloc(wh * sizeof(int));
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int *g = (int *)malloc(wh * sizeof(int));
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int *b = (int *)malloc(wh * sizeof(int));
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int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
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int *vmin = (int *)malloc(MAX(w,h) * sizeof(int));
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int divsum = (div + 1) >> 1;
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divsum *= divsum;
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int *dv = (int *)malloc(256 * divsum * sizeof(int));
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for (i = 0; i < 256 * divsum; i++) {
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dv[i] = (i / divsum);
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}
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yw = yi = 0;
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int(*stack)[3] = (int(*)[3])malloc(div * 3 * sizeof(int));
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int stackpointer;
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int stackstart;
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int *sir;
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int rbs;
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int r1 = radius + 1;
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int routsum, goutsum, boutsum;
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int rinsum, ginsum, binsum;
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for (y = 0; y < h; y++) {
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rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
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for (i = -radius; i <= radius; i++) {
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p = pix[yi + (MIN(wm, MAX(i, 0)))];
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sir = stack[i + radius];
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sir[0] = (p & 0xff0000) >> 16;
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sir[1] = (p & 0x00ff00) >> 8;
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sir[2] = (p & 0x0000ff);
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rbs = r1 - ABS(i);
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rsum += sir[0] * rbs;
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gsum += sir[1] * rbs;
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bsum += sir[2] * rbs;
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if (i > 0) {
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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}
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else {
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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}
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}
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stackpointer = radius;
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for (x = 0; x < w; x++) {
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r[yi] = dv[rsum];
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g[yi] = dv[gsum];
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b[yi] = dv[bsum];
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rsum -= routsum;
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gsum -= goutsum;
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bsum -= boutsum;
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stackstart = stackpointer - radius + div;
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sir = stack[stackstart % div];
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routsum -= sir[0];
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goutsum -= sir[1];
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boutsum -= sir[2];
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if (y == 0) {
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vmin[x] = MIN(x + radius + 1, wm);
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}
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p = pix[yw + vmin[x]];
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sir[0] = (p & 0xff0000) >> 16;
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sir[1] = (p & 0x00ff00) >> 8;
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sir[2] = (p & 0x0000ff);
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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rsum += rinsum;
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gsum += ginsum;
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bsum += binsum;
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stackpointer = (stackpointer + 1) % div;
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sir = stack[(stackpointer) % div];
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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rinsum -= sir[0];
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ginsum -= sir[1];
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binsum -= sir[2];
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yi++;
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}
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yw += w;
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}
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for (x = 0; x < w; x++) {
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rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
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yp = -radius * w;
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for (i = -radius; i <= radius; i++) {
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yi = MAX(0, yp) + x;
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sir = stack[i + radius];
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sir[0] = r[yi];
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sir[1] = g[yi];
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sir[2] = b[yi];
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rbs = r1 - ABS(i);
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rsum += r[yi] * rbs;
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gsum += g[yi] * rbs;
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bsum += b[yi] * rbs;
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if (i > 0) {
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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}
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else {
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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}
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if (i < hm) {
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yp += w;
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}
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}
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yi = x;
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stackpointer = radius;
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for (y = 0; y < h; y++) {
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// Preserve alpha channel: ( 0xff000000 & pix[yi] )
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pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];
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rsum -= routsum;
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gsum -= goutsum;
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bsum -= boutsum;
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stackstart = stackpointer - radius + div;
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sir = stack[stackstart % div];
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routsum -= sir[0];
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goutsum -= sir[1];
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boutsum -= sir[2];
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if (x == 0) {
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vmin[y] = MIN(y + r1, hm) * w;
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}
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p = x + vmin[y];
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sir[0] = r[p];
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sir[1] = g[p];
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sir[2] = b[p];
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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rsum += rinsum;
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gsum += ginsum;
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bsum += binsum;
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stackpointer = (stackpointer + 1) % div;
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sir = stack[stackpointer];
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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rinsum -= sir[0];
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ginsum -= sir[1];
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binsum -= sir[2];
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yi += w;
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}
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}
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free(r);
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free(g);
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free(b);
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free(vmin);
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free(dv);
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free(stack);
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return(pix);
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}

‎app/jni/com_accumulation_imageblurring_app_jni_ImageBlur.cpp

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#include <com_accumulation_imageblurring_app_jni_ImageBlur.h>
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#include <ImageBlur.cpp>
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#include <android/log.h>
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#include <android/bitmap.h>
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JNIEXPORT jintArray JNICALL Java_com_accumulation_imageblurring_app_jni_ImageBlur_blurIntArray
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(JNIEnv *env, jobject obj, jintArray arrIn, jint w, jint h, jint r)
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{
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jint *pix;
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pix = env->GetIntArrayElements(arrIn, NULL);
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if (pix == NULL)
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return NULL;
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//Start
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pix = StackBlur(pix, w, h, r);
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//End
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int size = w * h;
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jintArray result = env->NewIntArray(size);
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env->SetIntArrayRegion(result, 0, size, pix);
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env->ReleaseIntArrayElements(arrIn, pix, 0);
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return result;
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}
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JNIEXPORT void JNICALL Java_com_accumulation_imageblurring_app_jni_ImageBlur_blurBitMap
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(JNIEnv *env, jobject obj, jobject bitmapIn, jint r)
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{
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AndroidBitmapInfo infoIn;
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void* pixelsIn;
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int ret;
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// Get image info
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if ((ret = AndroidBitmap_getInfo(env, bitmapIn, &infoIn)) < 0)
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return;
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// Check image
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if (infoIn.format != ANDROID_BITMAP_FORMAT_RGBA_8888)
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return;
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// Lock all images
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if ((ret = AndroidBitmap_lockPixels(env, bitmapIn, &pixelsIn)) < 0) {
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//AndroidBitmap_lockPixels failed!
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}
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//height width
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int h = infoIn.height;
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int w = infoIn.width;
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//Start
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pixelsIn = StackBlur((int*)pixelsIn, w, h, r);
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//End
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// Unlocks everything
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AndroidBitmap_unlockPixels(env, bitmapIn);
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}

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