to know an image is PNG32 or PNG8

[adem666]

is there any way to know an image is png32 or png8 in runtime state ?

because, I need to know which image use how much heap when it s loaded.

I can compute it with image.width x image.height. but, I need to know 32 or 8 bit depth to know exact heap size.

[bhanuchandar.k]

Hi adem666,

Please refer the javax.microedition.lcdui.Graphics APIods toc . First create the image object from the image object get the graphics and try some of these meth to compute color depth getBlueComponent() , getReadComponent() , getGreenComponent() , getGrayScale() methods . May be these methods helps you .

Depth of the image will be calculated like = r*g*b

[grahamhughes]

The original format is irrelevant to the heap requirements. The number of bits per pixel will be chosen by the phone, usually to match it's display hardware (plus some implementation-dependent alpha data).

Graham.