alpha

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Canvas code not working in IE9 - probably alpha or globalCompositeOperation issue

I have a javascript routine which is designed to flickering sun rays.The routine creates \'numRays\' rays, then begins to overwrite the rays using globalCompositeOperation = \'copy\' and drawing a tra[详细]

2023-03-10 03:06 分类：问答
How to make a original image alpha gradient?

I am using coverflow and I want to make the image\'s shadow in the coverflow gradiently alpha. For example, the alpha at the top of the image would be 0.5, and at the bottom of image it would be开发者[详细]

2023-03-09 17:55 分类：问答
Java: extract Alpha Channel from BufferedImage

I would like 开发者_开发技巧to extract the Alpha Channel from a bufferedimage and paint it in a separate image using greyscale. (like it is displayed in photoshop)Not tested but contains the main poin[详细]

2023-03-09 12:30 分类：问答
Transparency in Java.Robot.createScreenCapture

Pretty much all I want to know is if there is any way that you can get alpha/transparency when taking a screenshot using java.开发者_StackOverflow中文版robot.createScreenCapture()?No, not as far as I[详细]

2023-03-09 01:59 分类：问答
The method setAlpha(int) is undefined for the type View

so i am trying to programmatically change the alpha value of a view based on the position of a seekbar. this is what i originally had: view.setAlpha(x); with that i get this error The method setAlpha([详细]

2023-03-08 11:01 分类：问答
Color mask on a png file

I would like to propose a simple way for a user to change to color of a png file (for example showing a color palette and show a live preview of the result).[详细]

2023-03-07 19:15 分类：问答
Is it possible storing drawn graphics into temp bitmap for later alpha composition on HTML5 canvas?

I\'m making some kind of UI layers with HTML5 canvas. All layers can开发者_C百科 be nested and can have alpha. Nested layers should be drawn with correct alpha composition. To do this, some kind of te[详细]

2023-03-07 10:33 分类：问答
How to read the original alpha channel from PNG in J2ME?

I\'m writing a simple J2ME game that uses PNG images with 8-bit alpha channel. Problem: not all hardware supports full alpha transparency rendering. However, since my game is pretty static in nature ([详细]

2023-03-04 18:45 分类：问答
Play video with alpha channel in iOS?

Is it possible to play a video with alpha channel in you iPhone app? I\'m thinking UIView with a subview (the movie view) and play a movie with alpha channel in that v开发者_如何学Pythoniew..[详细]

2023-03-03 16:24 分类：问答
How to implement alpha gradient on a image?

I want to implement alpha gradient on an image. From 0.5 alfa on top of the image to 0.0 on bottom. Any a开发者_JS百科dvice, tutorial, link is welcome.You can use CGImageCreateWithMask to apply a mask[详细]

2023-03-03 15:04 分类：问答