橡皮擦/橡胶为Android帆布 [英] Eraser/rubber for Android Canvas

问题描述

任何一个可以告诉我如何消除在canvas..ie做了颜色，我HV一个丰富多彩的图像上已经通过绘制白色遍布帆布制成黑/白帆布现在它似乎是一个< STRONG>勾勒图片只有这同样可以为其它/黑白图像画。现在的问题是，我的应用程序有一个选项只用鼠标（手指）的行程，其原有的颜色填充图像，据我，如果我可以抹去的白色（或任何颜色的原始图像上面做的），那么我就崩达到所需的选项..
   任何帮助...
请给我建议任何其他方式也能实现这一点，如果存在.....

Can any one tell me how to erase the color done on a canvas..i.e., I hv a colorful image on canvas that has been made B/W by drawing white color all over the canvas now it appeared to be a sketched image only which can be painted similarly as other B/W image. Now the question is that My application has one option to fill the image with its original color with stroke of mouse(finger) only, According to me if i can erase the white color(or any of its color done above the original image) then i 'll achieve the required option.. Any help... Please suggest me any other way to achieve this also, if there is.....

谢谢,,,

推荐答案

这将有可能通过创建一个名为掩蔽的照片店铺功能（或阿尔法蒙或图像屏蔽）在Android中使用porterduff和xfermode。

It would be possible by creating a photo-shop functionality named Masking(or alpha masking or image masking) in android using porterduff and xfermode.

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