Bitmap.ImageAlpha property. Returns the image data of the bitmap's transparency softmask. If the bitmap is not transparent, returns Nothing. ImageAlpha / ImageOptim. For the Mac user, ImageOptim is a free desktop tool that I use every day to optimize PNG images – mostly screenshots – before I upload them. These tools are easy to use, you just drag and drop your files, but you have to do one image at a time.
Meter=Image displays either an image defined by a measure value, or any named image. If W and/or H are included in the meter options, the image will be scaled to fit the meter size.
- ImageAlpha greatly reduces file sizes of 24-bit PNG files (including alpha transparency) by applying lossy compression and conversion to a more efficient PNG8+alpha format. Such images are compatible with iOS, all browsers, and even degrade well in IE6. ImageAlpha can achieve better quality than similar function in Adobe Fireworks.
- Hi, I am new to Unity. I have 3 images on my UI that are set at 0.5 alpha. When the player collects a collectable in the game, I would like one of the images to turn to full alpha, then the same for collectable 2 and so on.
Supported image formats are .png, .jpg, .bmp, .gif (no animation supported), .tif, .webP, and .ico.
Note: If no file extension is included, .png is assumed.
Options
All general meter options are valid.
All general image options are valid for ImageName.
MeasureName, MeasureName2, ..., MeasureNameNName(s) of the measure(s) bound to the meter. The value of a measure or measures will define the image file to be used in the meter. The value can define a full path and name of any supported image file, or just the name if the ImagePath option is used or the image file is in the current skin folder.
ImageNameDefault: %1.pngName of an image file. This can be a full path and name of any supported image file, or just the name of the file if the ImagePath option is used or the image file is in the current skin folder.
Note: If a MeasureNameN option is defined, it will override any named file in the ImageName option. Generally, MeasureNameN and ImageName will not be used together in the same meter.
MeasureName returns a file name with no extension, and the default .png is not desired, or when ImageName is being used to define an image based on the combined values of the measures in 
MeasureNameN and uses the %N syntax as follows:Note: When ImageName is hard-coded with an image file name, the image will be loaded and 'cached', to avoid reloading the image from disk on every meter update. If there is an external process that is changing the image file, while leaving the name the same, use DynamicVariables=1 on the meter to force the image to be reloaded from disk on every meter update.
PreserveAspectRatioDefault: 0Controls how W and H scale the image when Tile=0. Valid values are:
0: The image is scaled to exactly fit the bounds specified byWandHwithout regard to aspect ratio.1: The image is scaled to fit within the bounds specified byWand/orHwhile preserving the aspect ratio.2: The image is scaled and cropped to fill the bounds specified byWand/orHwhile preserving the aspect ratio.
Note: If only one of either W or H is defined, then PreserveAspectRatio will default to 1.
ScaleMarginsFormat: Left, Top, Right, BottomMargins of the image to exclude from scaling when Tile=0 and PreserveAspectRatio=0.
Example:ScaleMargins=10, 50, 10, 50
TileDefault: 0If set to 1, the image is tiled (repeated) within the bounds defined by W and H.
Hint: Using the SolidColor option, along with W and H options, an image meter may be used to draw squares, rectangles or lines without needing any ImageName or MeasureName.
However, no manipulations can be done to the resulting square, rectangle or line with any general image options. Only actual images loaded from a file can be manipulated. (e.g. ImageRotate)
Deprecated Features
The following options have been deprecated and should not be used. They are still supported, but may be removed in future versions.
Path
The Path option to define the location of images is replaced by the ImagePath option in general image options.
Example
Mask Image
Note: This MaskImage functionality is better done with the far more powerful and flexible Container option. MaskImage will continue to be supported, but is no longer recommended.
Imagealpha Imageoptim
MaskImageNameDefault: NoneName of an image file to use as a mask for the primary image defined with MeasureName or ImageName. The size and shape of MaskImageName will be used to mask and define the size and shape of the primary image.
MaskImageName can be a full path and name of any supported image file, or just the name of the file if the MaskImagePath option is used, or the image file is in the current skin folder.
If MaskImageName is defined, then W and H define the size of the mask image, and the size of the meter. Whatever is defined as the primary image with ImageName or MeasureName is then masked into the mask image, displaying in any non-transparent areas of MaskImageName using a 'fill' method that sizes and crops the image to fit while preserving the aspect ratio.
If either the primary image or mask image has areas of transparency or partial transparency, those 'alpha channel' values are applied to the final image. When both images have a shared area with full or partial transparency, the 'most transparent' value is applied.
Notes:
MaskImageName cannot be bound to the meter from a measure with MeasureNameN and %1, %2 etc.
If MaskImageName is defined, then ScaleMargins and Tile options cannot be used on the meter.
MaskImagePathDefault: NoneFolder path where an image is located. (e.g. MaskImagePath=#@#Images).
MaskImageFlipDefault: NoneImage Alpha Png
Flips the image. Valid values are None, Horizontal, Vertical or Both.
Imagealpha
MaskImageRotateDefault: 0.0Image Alphabet
Rotates the image by the specified angle in degrees. Negative angles can be used for counter-clockwise rotation.