QBitmap

QBitmap is a class in the Qt application framework that represents a monochrome bitmap. It stores 1-bit-per-pixel image data and is commonly used as a mask or for simple raster images in GUI components. The single-bit depth makes QBitmap efficient for shape masks and cursor definitions.

QBitmap is related to QPixmap and QImage in that it holds bitmap data while focusing on binary color information. It can be constructed from a QImage or raw data and can be converted back to a QImage. As a paint device, it supports standard drawing operations via QPainter when used as the target, and it can interact with other Qt image and graphics constructs such as QPixmap and QRegion.

Common uses include shaping widget windows by applying a mask (for example, through widget masking), providing cursor shapes or masks, and serving as a binary bitmap for simple icons or glyphs. A bitmap can be used as a mask to control which parts of a pixmap or widget are visible, enabling transparent-like effects without color channels. QBitmap can also be created from data buffers and subsequently manipulated or combined with other images in painting workflows.

Cross-platform and part of the Qt framework, QBitmap is available on all supported Qt platforms, including desktop and mobile environments. It remains a lightweight option for binary images where color information is unnecessary, and it complements richer image types by providing efficient mask and shape capabilities.