alpha

I am creating bitmap, next i am drawing second solid color bitmap on top of it. And now i want to change first bitmap, so solid color that i drawed on it will be transparent. Or simply, i want to remove all pixels of one color from bitmap. I havie tried every colorfilter, and xfermode with no luck, is there any other possibility to remove color other that doing it pixel by pixel? This works for removing a certain color from a bitmap. The main part is the use of AvoidXfermode. It should also work if trying to change one color to another color. I should add that this answers the question title

I have a 3 column matrix; plots are made by points based on column 1 and column 2 values, but colored based on column 2 (6 different groups). I can successfully plot all points, however, the last plot group (group 6) which was assigned the color purple, masks the plots of the other groups. Is there a way to make the plot points more transparent? s <- read.table("/.../parse-output.txt", sep="\t") dim(s) [1] 67124 3 x <- s[,1] y <- s[,2] z <- s[,3] cols <- cut(z, 6, labels = c("pink", "red", "yellow", "blue", "green", "purple")) plot(x, y, main= "Fragment recruitment plot - FR-HIT", ylab =

Is it possible to set a transparency or alpha level on SVG fill colours? I've tried adding two values to the fill tag (changing it from fill="#044B94" to fill="#044B9466"), but this doesn't work. Williham Totland You use an addtional attribute; fill-opacity : This attribute takes a decimal number between 0.0 and 1.0, inclusive; where 0.0 is completely transparent. For example: <rect ... fill="#044B94" fill-opacity="0.4"/> Additionally you have the following: stroke-opacity attribute for the stroke opacity for the entire object As a not yet fully standardized solution (though in alignment with

In my example, I have 3 views: one red view containing two white views. I change the red container view's alpha to 0.3 and this happens (look at the image, the current result). By seeing this, I can only assume (tell me if I'm wrong) that setting a view's alpha will also set all of its subviews' alphas. My question is : is there a way to simply tell the red view to act as a whole so that setting its alpha would give something that looks like the wanted result (in the image)? This is what it looks like without any alpha : Check out the possible UIKit keys for Info.plist, specifically

I have been trying to create a video template which uses alpha channel video overlayed on the mp4 videos and images. This is how I need to create a video http://viewptch.ptchcdn.com/rendered/52b28a9f8d4f980f3a3f99c3_cb44bf2b/52b28a9f8d4f980f3a3f99c3_lrg_main_main.mov For overlaying alpha video on another videos, I have used AVAnimator, I was succeeded for playing a preview using AVFoundation, AVSynchronizedLayer and AVAnimator. When rendering video from composition, frames of alpha channel videos renders very slowly. I need to create a video with alpha channel video on top of another video.