Purpose

Sets the alpha transparency value for a given image surface

Protoype

void CImageMngr::SetAlpha (string str_img_id, int i_alpha)

Parameters

Description

Each image surface has its own alpha transparency level. The range of values for transparency are from 255 (opaque) to 0 (transparent). The mid-value of 128 is an optomized value as well.

Use

CImageMngr image;

// set image half transparent
image.SetAlpha("my_image", 128);