alpha

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Android: image doesn't keep it's original color with use of canvas.drawBitmap

I\'m developing an android app and I\'m facing a weird issue. I\'m doing some image processing on a SurfaceView. I\'m drawing the processed image using a canvas and the following method:[详细]

2023-02-05 19:55 分类：问答
Color alpha-channel in DataGridView

How do I color a cell in a datagridview with the alpha-channel? 开发者_开发百科 RGB works ok, but when specifying the alpha I get distorted numbers instead. I make this color change in the cellPaintin[详细]

2023-02-05 12:22 分类：问答
ImageIO ignores PNG alpha channel

It seems that PNG loaded with ImageIO.read ignore the alpha channel. (I tried with JRE 6 update 20) Bug ?[详细]

2023-02-03 05:24 分类：问答
VB .NET picture GetPixel & SetPixel: Include alpha?

I am trying to use GetPixel and SetPixel to copy the contents of one picture to another (I know there are other methods to do so, but there are reasons I want to try this ;D)[详细]

2023-02-02 11:07 分类：问答
How do I change the alpha channel of a color in a color picker dialog?

I\'ve made a Color Picker in C#, but s开发者_如何学Goomeone asked me to make an Alpha property. So far it works great, except for the part of the Alpha property itself.[详细]

2023-02-01 20:15 分类：问答
Rendering particles as GL_TRIANGLE_FANs with transparency in OpenGL

I want to render particles with hexagons that fade out to the outside. I\'ve used a TRIANGLE_FAN for each particle.开发者_高级运维 However, the transparency doesn\'t look very nice.[详细]

2023-01-31 08:06 分类：问答
Pixel per Pixel image, transparent turned into black

I read a couple of thing about this, but I can\'t figure how to put it in my code. Here it is : function go($im开发者_如何学Pythonage) {[详细]

2023-01-31 01:42 分类：问答
IOS: setting 'dimmer' view's alpha to greater than 0.0 disables touch events(?)

I have an app in which I am trying to allow the user to dim the display by gestures.I have a UIView which contains a number of other views and buttons, and over that I place a UIView whose background[详细]

2023-01-28 23:11 分类：问答
C# Alpha Blended form with Alpha Blended Controls

Alpha blended forms a开发者_如何学Gore no problem (for example http://www.codeproject.com/KB/graphics/alphaBG.aspx) but alpha blended controls like pictureboxes with 32bit images don\'t work...[详细]

2023-01-28 07:44 分类：问答
iPhone UIBarButtonItem alpha of button image

I\'ve added a button to a lower toolbar like this: UIImage *locationImage = [UIImage imageNamed:@\"193-location-arrow.png\"];[详细]

2023-01-28 00:21 分类：问答