Paint畫筆(一)

1彩届、Paint-濾鏡

1、LightingColorFilter濾鏡

   /**
         LightingColorFilter(@ColorInt int mul, @ColorInt int add)
         mul和add都是和顏色值格式形同的int值压固，其中mul用來和目標像素相乘腮介，add用來和目標像素相加；
         * R' = R * mul.R / 0xff + add.R
         * G' = G * mul.G / 0xff + add.G
         * B' = B * mul.B / 0xff + add.B
         */
        //紅色去除掉
        LightingColorFilter lighting = new LightingColorFilter(0x00ffff,0x000000);
        mPaint.setColorFilter(lighting);
        canvas.drawBitmap(mBitmap, 0,0, mPaint);

        //原始圖片效果
        LightingColorFilter lighting = new LightingColorFilter(0xffffff,0x000000);
        mPaint.setColorFilter(lighting);
        canvas.drawBitmap(mBitmap, 0,0, mPaint);

        //綠色更亮
        LightingColorFilter lighting = new LightingColorFilter(0xffffff,0x003000);
        mPaint.setColorFilter(lighting);
        canvas.drawBitmap(mBitmap, 0,0, mPaint);

2斗埂、PorterDuffColorFilter濾鏡

        /**
         *  PorterDuffColorFilter(@ColorInt int color, @NonNull PorterDuff.Mode mode)
         *  color符糊，具體的顏色值，例如Color.RED
         *  mode呛凶，指定PorterDuff.Mode的圖層混合模式
         */
        PorterDuffColorFilter porterDuffColorFilter = new PorterDuffColorFilter(Color.RED, PorterDuff.Mode.DARKEN);
        mPaint.setColorFilter(porterDuffColorFilter);
        canvas.drawBitmap(mBitmap, 100, 0, mPaint);

2-1.png

3男娄、ColorMatrixColorFilter濾鏡

        //第一種方式
       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
        };

        ColorMatrixColorFilter mColorMatrixColorFilter = new ColorMatrixColorFilter(colorMatrix);
        mPaint.setColorFilter(mColorMatrixColorFilter);
        canvas.drawBitmap(mBitmap, 100, 0, mPaint);

        //第二種方式
        ColorMatrix cm = new ColorMatrix();
        //亮度調(diào)節(jié)
        cm.setScale(2,1,1,1);
        //飽和度調(diào)節(jié)0-無色彩， 1- 默認效果漾稀， >1飽和度加強
        cm.setSaturation(2);
        //色調(diào)調(diào)節(jié)
        cm.setRotate(0, 45);
        ColorMatrixColorFilter mColorMatrixColorFilter = new ColorMatrixColorFilter(cm);
        mPaint.setColorFilter(mColorMatrixColorFilter);
        canvas.drawBitmap(mBitmap, 100, 0, mPaint);