CMdaImageFileToBitmapUtility::ConvertL() and masked bitmap images

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Article Metadata

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Compatibility

Platform(s): S60 1st Edition
S60 2nd Edition

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Article

Created: User:Technical writer 2 (06 Aug 2003)

Last edited: lpvalente (15 Jun 2013)

Overview

CMdaImageFileToBitmapUtility::ConvertL() and masked bitmap images.

Description

When using CMdaImageFileToBitmapUtility to convert a .gif image with a mask to bitmap (CFbsBitmap), I get an empty bitmap for both the image and the mask. What is wrong?

Solution

Mask bitmaps should always be 2-color (monochrome) bitmaps. While some APIs accept mask bitmaps with a higher color depth, they may not work correctly. Also, monochrome mask bitmaps reserve less memory. The same applies, for example, to CWindowGc::BitBltMasked().