Table of Contents
 
ChangeAlpha
 

Purpose

Changes the alpha transparency value for a given image surface relative to its current value
 

Protoype

void CImageMngr::ChangeAlpha (string str_img_id, int i_alpha_change)
 

Parameters

img_id the ID of the image object to change
alpha_change the change in alpha transparency value
 

Description

This function changes the value of a given image surface's alpha value by a given amount. If a surface has an alpha value of 45, passing in a change of 15 will set an alpha value of 60.
 

Use

CImageMngr image;
// increase the alpha by 25
image.ChangeAlpha("my_image", 25);
 
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