The alpha value of pixels can be set in transparent bitmaps only (i.e., bitmaps created with the value true passed to the transparent parameter of the BitmapData constructor) : BitmapData « Graphics « Flash / Flex / ActionScript

Flash / Flex / ActionScript
1. Animation
2. Array
3. Class
4. Data Type
5. Development
6. Function
7. Graphics
8. Language
9. Network
10. Regular Expressions
11. Statement
12. String
13. TextField
14. XML
Java
Java Tutorial
Java Source Code / Java Documentation
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Flash / Flex / ActionScript » Graphics » BitmapData 
The alpha value of pixels can be set in transparent bitmaps only (i.e., bitmaps created with the value true passed to the transparent parameter of the BitmapData constructor)
 

package{
  import flash.display.*;
  
  public class Main extends Sprite{
    public function Main(){

        var imgData:BitmapData = new BitmapData(2020, true, 0x330000FF);
        trace(imgData.getPixel32(00));  // Displays: 855638271
                                  // (Alpha is 0x33)

    }
  }
}

        
Related examples in the same category
1. Creating a BitmapData Object
2. Displaying BitmapData Images
3. Creating a New Bitmap Image from ImageData
4. Creating a Flood Fill
5. Create animation by setting the bitmap pixel
6. Dissolve
7. File BitmapData with Rectangle
8. Get pixel data from BitmapData
9. getPixel32() Versus getPixel( )
10. Retrieve a pixel with Alpha set to 255, from a transparent image
11. Retrieving the Color of a Region of Pixels
12. Modifying a BitmapData
13. Assign a pixel value using a number that specifies an Alpha channel of CC
14. Using BitmapData.lock( ) to improve performance
15. Assigning the Color of a Region of Pixels
16. How draw( ) handles Alpha channel values
17. Applying Color Transformations
18. Detecting Areas by Color
19. Adding Noise
20. Adding Perlin Noise
21. Updates the octaves parameter
22. The randomSeed parameter is responsible for the randomness of the noise
23. The following code makes a BitmapData object with Perlin noise, and then uses that object as a bitmap fill. Because the stitch parameter is false, the edges are visible as it tiles.
24. PerlinNoise animation
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.