如何使周围位图的发光效果？ [英] How to make glow effect around a bitmap?

问题描述

下面code是什么，我得到了这么远。但是，也有2个问题：

The following code is what I got so far. However, there are 2 issues:

1. 我想内外发光效果，这类似于Photoshop的混合选项。但我只是设法让外发光，如果设置了 BlurMaskFilter.Blur.INNER 或其它值，整个图像被阻挡，而不是仅仅边缘。

1. I want both inner and outer glow effects, which look similar to the Photoshop's blending options. But I only managed to make the outer glow, if I set BlurMaskFilter.Blur.INNER or other value, the whole image is blocked, instead of just edges.

尽管我设置 FF 的Alpha值，光晕颜色还是很暗。

Despite I set "FF" as alpha value, the glow color is still very dark.

Bitmap alpha = origin.extractAlpha();
BlurMaskFilter blurMaskFilter = new BlurMaskFilter(5, BlurMaskFilter.Blur.OUTER);

Paint paint = new Paint();
paint.setMaskFilter(blurMaskFilter);
paint.setColor(0xffffffff);

Canvas canvas = new Canvas(origin);
canvas.drawBitmap(alpha, 0, 0, paint);

return origin;

推荐答案

这里是解决方案：

的http://www.shaikhhamadali.blogspot.ro/2013/06/highlightfocusshadow-image-in-imageview.html

 public Bitmap highlightImage(Bitmap src) {
        // create new bitmap, which will be painted and becomes result image
        Bitmap bmOut = Bitmap.createBitmap(src.getWidth() + 96, src.getHeight() + 96, Bitmap.Config.ARGB_8888);
        // setup canvas for painting
        Canvas canvas = new Canvas(bmOut);
        // setup default color
        canvas.drawColor(0, PorterDuff.Mode.CLEAR);
        // create a blur paint for capturing alpha
        Paint ptBlur = new Paint();
        ptBlur.setMaskFilter(new BlurMaskFilter(15, Blur.NORMAL));
        int[] offsetXY = new int[2];
        // capture alpha into a bitmap
        Bitmap bmAlpha = src.extractAlpha(ptBlur, offsetXY);
        // create a color paint
        Paint ptAlphaColor = new Paint();
        ptAlphaColor.setColor(0xFFFFFFFF);
        // paint color for captured alpha region (bitmap)
        canvas.drawBitmap(bmAlpha, offsetXY[0], offsetXY[1], ptAlphaColor);
        // free memory
        bmAlpha.recycle();

        // paint the image source
        canvas.drawBitmap(src, 0, 0, null);

        // return out final image
        return bmOut;
    }

这将鸽子你的问题更多的图像位图效果访问的博客这些链接：

this will dove your question for more image bitmap effects visit these links on blog:

www.shaikhhamadali.blogspot.com

Highlight/focus/shadow the image in ImageView
Invert the Image in ImageView
Gray Scale the Image in ImageView (Android)
set Gamma of image in ImageView
Saturation Filter Effect on image in ImageView
Hue Filter Effect on image in ImageView
Engraving Effect on image in ImageView
Emboss Effect on image in ImageView
Smooth Effect on image in ImageView
Mean Removal Effect on image in ImageView
Set sharpness of the image in ImageView
Gaussian Blur the image(Bitmap) in ImageView
Convolution Matrix for image processing
Color Boost the image(Bitmap) in ImageView
Set brightness of the image(increase,decrease) in ImageView
B/W Contrast and Color Contrast the image in ImageView 
Reducing color depth of image in ImageView
Sepia-toning Effect (Photography) of image in ImageView
filter color channels/ set color channels of image in ImageView
Change/Replacement/Remove pixel colors in ImageView
Water Mark the Image in ImageView

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