Android Paint 进阶之滤镜效果(ColorFilter)

    上一节整理了图层混合模式(Xfermode),这一节主要整理滤镜(ColorFilter)的使用。

分类

    滤镜ColorFilter有三个子类,分别是LightingColorFilter、PorterDuffColorFilter和ColorMatrixColorFilter。

使用

1.LightingColorFilter

    首先看下构造函数LightingColorFilter(@ColorInt int mul, @ColorInt int add),构造函数有两个参数,分别是mul和add,都是十六进制的整型颜色,混合后的颜色规则如下:

           R' = R * mul.R / 0xff + add.R
           G' = G * mul.G / 0xff + add.G
           B' = B * mul.B / 0xff + add.B

    举个栗子,我们保持原图效果不变:

        LightingColorFilter lighting = new LightingColorFilter(0xffffff,0x000000);
        mPaint.setColorFilter(lighting);
        canvas.drawBitmap(mBitmap, 0,0, mPaint);

Android Paint 进阶之滤镜效果(ColorFilter)_第1张图片

再举个栗子,如果我们想要去掉图片中的红色,只需要将第一个参数对应红色的两位设置为0,第二个参数传入0x000000,然后根据红色计算规则混合后的红色值即为0:

        LightingColorFilter lighting = new LightingColorFilter(0x00ffff,0x000000);
        mPaint.setColorFilter(lighting);
        canvas.drawBitmap(mBitmap, 0,0,mPaint);

Android Paint 进阶之滤镜效果(ColorFilter)_第2张图片   

再举最后一个栗子,如果我们想要图片中的绿色更亮,第一个参数传入0xffffff,第二个参数中对应绿色的两位大于0即可:

        LightingColorFilter lighting = new LightingColorFilter(0xffffff,0x00f600);
        mPaint.setColorFilter(lighting);
        canvas.drawBitmap(mBitmap, 0,0, mPaint);

Android Paint 进阶之滤镜效果(ColorFilter)_第3张图片

2.PorterDuffColorFilter

    首先看下构造函数PorterDuffColorFilter(@ColorInt int color, @NonNull PorterDuff.Mode mode),构造函数有两个参数,分别是color和mode,两个参数混合规则类似于图层混合,color是源图层,mode为18种图层混合模式之一,简单的举个栗子:

        PorterDuffColorFilter porterDuffColorFilter = new PorterDuffColorFilter(Color.RED, PorterDuff.Mode.LIGHTEN);
        mPaint.setColorFilter(porterDuffColorFilter);
        canvas.drawBitmap(mBitmap, 0, 0, mPaint);

    第一个参数即源图层,为红色;第二个参数即图层混合模式,为LIGHTEN,图层相交的地方更亮

Android Paint 进阶之滤镜效果(ColorFilter)_第4张图片

3.ColorMatrixColorFilter

    ColorMatrixColorFilter的构造函数有两个,一个是ColorMatrixColorFilter(@NonNull float[] array),另一个是ColorMatrixColorFilter(@NonNull ColorMatrix matrix),下面针对两种用法分别举例。

    先看第一种,传入一个float类型的数组,其中相邻5位代表一种颜色,加上透明度,一共20位,如下面这个例子

float[] colorMatrix = {
               2, 0, 0, 0, 0,   //red
               0, 1, 0, 0, 0,   //green
               0, 0, 1, 0, 0,   //blue
               0, 0, 0, 1, 0    //alpha
       };

使用比较简单,我们实现一个简单的胶片效果:

 float colormatrix_fanse[] = {
                -1.0f, 0.0f, 0.0f, 0.0f, 255.0f,
                0.0f, -1.0f, 0.0f, 0.0f, 255.0f,
                0.0f, 0.0f, -1.0f, 0.0f, 255.0f,
                0.0f, 0.0f, 0.0f, 1.0f, 0.0f
        };
        mColorMatrixColorFilter = new ColorMatrixColorFilter(colormatrix_fanse);
        mPaint.setColorFilter(mColorMatrixColorFilter);
        canvas.drawBitmap(mBitmap, 100, 0, mPaint);

Android Paint 进阶之滤镜效果(ColorFilter)_第5张图片

接下来看第二种构造函数,它可以对亮度、饱和度、色调等进行调节,例子:

 ColorMatrix cm = new ColorMatrix();
        cm.setScale(1, 2, 1, 1);//亮度调节
        cm.setSaturation(2);//饱和度调节0-无色彩, 1- 默认效果, >1饱和度加强
        cm.setRotate(0, 45);//        色调调节
        mColorMatrixColorFilter = new ColorMatrixColorFilter(cm);
        mPaint.setColorFilter(mColorMatrixColorFilter);
        canvas.drawBitmap(mBitmap, 100, 0, mPaint);

Android Paint 进阶之滤镜效果(ColorFilter)_第6张图片

    附上常见滤镜效果对应的矩阵值:

/**
 * 收集的颜色滤镜
 */
public class ColorFilter {

    /**
     * 为imageView设置颜色滤镜
     *
     * @param imageView
     * @param colormatrix
     */
    public static void imageViewColorFilter(ImageView imageView, float[] colormatrix) {
        setColorMatrixColorFilter(imageView, new ColorMatrixColorFilter(new ColorMatrix(colormatrix)));
    }

    /**
     * 为imageView设置颜色偏向滤镜
     *
     * @param imageView
     * @param color
     */
    public static void imageViewColorFilter(ImageView imageView, int color) {
        ColorMatrix colorMatrix = new ColorMatrix();
        colorMatrix.setScale(Color.alpha(color), Color.red(color), Color.green(color), Color.blue(color));
        setColorMatrixColorFilter(imageView, new ColorMatrixColorFilter(colorMatrix));
    }


    /**
     * 生成对应颜色偏向滤镜的图片,并回收原图
     *
     * @param bitmap
     * @param color
     * @return
     */
    public static Bitmap bitmapColorFilter(Bitmap bitmap, int color) {
        ColorMatrix colorMatrix = new ColorMatrix();
        colorMatrix.setScale(Color.alpha(color), Color.red(color), Color.green(color), Color.blue(color));
        return setColorMatrixColorFilter(bitmap, new ColorMatrixColorFilter(colorMatrix), true);
    }

    /**
     * 生成对应颜色滤镜的图片,并回收原图
     *
     * @param bitmap
     * @param colormatrix
     * @return
     */
    public static Bitmap bitmapColorFilter(Bitmap bitmap, float[] colormatrix) {
        return setColorMatrix(bitmap, colormatrix, true);
    }

    /**
     * 生成对应颜色滤镜的图片
     *
     * @param bitmap
     * @param colormatrix
     * @param isRecycle
     * @return
     */
    public static Bitmap setColorMatrix(Bitmap bitmap, float[] colormatrix, boolean isRecycle) {
        return setColorMatrixColorFilter(bitmap, new ColorMatrixColorFilter(new ColorMatrix(colormatrix)), isRecycle);
    }


    public static void setColorMatrixColorFilter(ImageView imageView, ColorMatrixColorFilter matrixColorFilter) {
        imageView.setColorFilter(matrixColorFilter);
    }

    public static Bitmap setColorMatrixColorFilter(Bitmap bitmap, ColorMatrixColorFilter matrixColorFilter, boolean isRecycle) {
        Bitmap resource = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setColorFilter(matrixColorFilter);
        Canvas canvas = new Canvas(resource);
        canvas.drawBitmap(bitmap, 0, 0, paint);
        return resource;
    }


    // 黑白
    public static final float colormatrix_heibai[] = {
            0.8f, 1.6f, 0.2f, 0, -163.9f,
            0.8f, 1.6f, 0.2f, 0, -163.9f,
            0.8f, 1.6f, 0.2f, 0, -163.9f,
            0, 0, 0, 1.0f, 0};
    // 怀旧
    public static final float colormatrix_huajiu[] = {
            0.2f, 0.5f, 0.1f, 0, 40.8f,
            0.2f, 0.5f, 0.1f, 0, 40.8f,
            0.2f, 0.5f, 0.1f, 0, 40.8f,
            0, 0, 0, 1, 0};
    // 哥特
    public static final float colormatrix_gete[] = {
            1.9f, -0.3f, -0.2f, 0, -87.0f,
            -0.2f, 1.7f, -0.1f, 0, -87.0f,
            -0.1f, -0.6f, 2.0f, 0, -87.0f,
            0, 0, 0, 1.0f, 0};
    // 淡雅
    public static final float colormatrix_danya[] = {
            0.6f, 0.3f, 0.1f, 0, 73.3f,
            0.2f, 0.7f, 0.1f, 0, 73.3f,
            0.2f, 0.3f, 0.4f, 0, 73.3f,
            0, 0, 0, 1.0f, 0};
    // 蓝调
    public static final float colormatrix_landiao[] = {
            2.1f, -1.4f, 0.6f, 0.0f, -71.0f,
            -0.3f, 2.0f, -0.3f, 0.0f, -71.0f,
            -1.1f, -0.2f, 2.6f, 0.0f, -71.0f,
            0.0f, 0.0f, 0.0f, 1.0f, 0.0f};
    // 光晕
    public static final float colormatrix_guangyun[] = {
            0.9f, 0, 0, 0, 64.9f,
            0, 0.9f, 0, 0, 64.9f,
            0, 0, 0.9f, 0, 64.9f,
            0, 0, 0, 1.0f, 0};
    // 梦幻
    public static final float colormatrix_menghuan[] = {
            0.8f, 0.3f, 0.1f, 0.0f, 46.5f,
            0.1f, 0.9f, 0.0f, 0.0f, 46.5f,
            0.1f, 0.3f, 0.7f, 0.0f, 46.5f,
            0.0f, 0.0f, 0.0f, 1.0f, 0.0f};
    // 酒红
    public static final float colormatrix_jiuhong[] = {
            1.2f, 0.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.9f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.0f, 0.8f, 0.0f, 0.0f,
            0, 0, 0, 1.0f, 0};
    // 胶片
    public static final float colormatrix_fanse[] = {
            -1.0f, 0.0f, 0.0f, 0.0f, 255.0f,
            0.0f, -1.0f, 0.0f, 0.0f, 255.0f,
            0.0f, 0.0f, -1.0f, 0.0f, 255.0f,
            0.0f, 0.0f, 0.0f, 1.0f, 0.0f};
    // 湖光掠影
    public static final float colormatrix_huguang[] = {
            0.8f, 0.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.0f, 0.9f, 0.0f, 0.0f,
            0, 0, 0, 1.0f, 0};
    // 褐片
    public static final float colormatrix_hepian[] = {
            1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.8f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.0f, 0.8f, 0.0f, 0.0f,
            0, 0, 0, 1.0f, 0};
    // 复古
    public static final float colormatrix_fugu[] = {
            0.9f, 0.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.8f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.0f, 0.5f, 0.0f, 0.0f,
            0, 0, 0, 1.0f, 0};
    // 泛黄
    public static final float colormatrix_huan_huang[] = {
            1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.0f, 0.5f, 0.0f, 0.0f,
            0, 0, 0, 1.0f, 0};
    // 传统
    public static final float colormatrix_chuan_tong[] = {
            1.0f, 0.0f, 0.0f, 0, -10f,
            0.0f, 1.0f, 0.0f, 0, -10f,
            0.0f, 0.0f, 1.0f, 0, -10f,
            0, 0, 0, 1, 0};
    // 胶片2
    public static final float colormatrix_jiao_pian[] = {
            0.71f, 0.2f, 0.0f, 0.0f, 60.0f,
            0.0f, 0.94f, 0.0f, 0.0f, 60.0f,
            0.0f, 0.0f, 0.62f, 0.0f, 60.0f,
            0, 0, 0, 1.0f, 0};

    // 锐色
    public static final float colormatrix_ruise[] = {
            4.8f, -1.0f, -0.1f, 0, -388.4f,
            -0.5f, 4.4f, -0.1f, 0, -388.4f,
            -0.5f, -1.0f, 5.2f, 0, -388.4f,
            0, 0, 0, 1.0f, 0};
    // 清宁
    public static final float colormatrix_qingning[] = {
            0.9f, 0, 0, 0, 0,
            0, 1.1f, 0, 0, 0,
            0, 0, 0.9f, 0, 0,
            0, 0, 0, 1.0f, 0};
    // 浪漫
    public static final float colormatrix_langman[] = {
            0.9f, 0, 0, 0, 63.0f,
            0, 0.9f, 0, 0, 63.0f,
            0, 0, 0.9f, 0, 63.0f,
            0, 0, 0, 1.0f, 0};
    // 夜色
    public static final float colormatrix_yese[] = {
            1.0f, 0.0f, 0.0f, 0.0f, -66.6f,
            0.0f, 1.1f, 0.0f, 0.0f, -66.6f,
            0.0f, 0.0f, 1.0f, 0.0f, -66.6f,
            0.0f, 0.0f, 0.0f, 1.0f, 0.0f};


}

 

Demo:https://github.com/987570437/PaintDemo

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