I found JPG does not support transparency, the alpha value is always 255. I am wondering only png supports transparency? Answer png-32 supports different levels of transparency. Each pixel can have an opacity between 0 and 255, with 0 as completely transparent. png-24 supports setting one color as fully transparent. Everything else will be opaque. … Read more
convert input.png -extent 100×100 -gravity center -background white output.png If the input is 50×50 the surrounding background is white. Can I somehow set this to transparent without declaring any color within input as transparent? Answer Use this instead: convert \ input.png \ -background none \ -gravity center \ -extent 100×100 \ output.png Note well: The … Read more
I’m looking for the smallest (in terms of filesize) transparent 1 pixel image. Currently I have a gif of 49 bytes which seems to be the most popular. But I remember many years ago having one which was less than 40 bytes. Could have been 32 bytes. Can anyone do better? Graphics format is no … Read more
I am using a linear layout and frame layout. In the linear layout I keep an image as background and in the frame layout I keep an imageView. In that imageView I give an image. Now I want to make the second image (that is in the imageView) transparent. How can I do this? Answer … Read more
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 5 years ago. Improve this question I have an image that has alpha channel transparency. I want to recreate the same background color with RGBA … Read more
This question already has an answer here: Change Background opacity without changing content opacity (1 answer) Closed 6 years ago. I have a window with the following appearance: What I would like, however, is if the Button controls (the gray ones with text in the middle) in the Window‘s main Grid had an opacity of … Read more
I have the following gradient: <?xml version=”1.0″ encoding=”utf-8″?> <shape xmlns:android=”http://schemas.android.com/apk/res/android”> <gradient android:startColor=”#ECECEC” android:centerColor=”#F6F6F4″ android:endColor=”#F8F8F6″ android:angle=”90″ android:dither=”true” /> </shape> I want this to be transparent because in my ListView I am setting this as my ListSelector: <ListView android:layout_width=”fill_parent” android:layout_height=”fill_parent” xmlns:android=”http://schemas.android.com/apk/res/android” android:id=”@+id/ARListView” android:background=”@drawable/transparent_background” android:cacheColorHint=”#00000000″ android:drawSelectorOnTop=”true” android:listSelector=”@drawable/stocks_selected_gradient”> </ListView> Answer Just use an 8-digit color value, e.g. #FFF8F8F6, where … Read more
Is it possible to cut out a hollow circle using only CSS? This we can all do: But can we do this? The circle must be hollow and transparent. Thus the problem is not solved by putting a solid color circle over a div. Answer You can achieve a transparent cut out circle with 2 … Read more
I need to merge two images (BufferedImage) in Java. It wouldn’t be a problem if there was no transparency. The base image already has some transparency. I want to keep this as it is and apply a “mask” to it, the second image. This second image has no opaque pixels, in fact it’s almost completely … Read more
Rendering contexts usually have a solid color on the background (black or whatever, see the image below): I’m wondering if it’s possible to setup a window, with no decorations AND with the transparent background, while allowing me to render OpenGL stuff on it. This would give the illusion that the triangle is floating on the … Read more
