TCustomBitmap32 is the central class in the Graphics32 library. It manages a single 32-bit device-independent bitmap (DIB) and provides methods for drawing on it and combining it with other DIBs.
Since TCustomBitmap32 is a descendant of TThreadPersistent, it inherits its locking mechanism and it may be used in multi-threaded applications.
Change notification events (OnChange, OnResize), inherited from TNotifiablePersistent and TCustomMap are generated by most drawing/resizing etc. functions with a few exceptions. Due to performance considerations the following functions are not accompanied with event generation:
If necessary, the OnChange event may be generated explicitly by calling the Changed methods.
Normally, if the bitmap is a part of some container (TImage32, TBitmapLayer, etc.), its change notification events are linked to the container, causing repaint operations. When making several simultaneous changes, it may be beneficial to enclose them in BeginUpdate…EndUpdate block followed by the Changed call to reduce the amount of repaintings of the container.
| Methods | Properties | Events |
|---|---|---|
| In TCustomBitmap32: | ||
| BeginMeasuring | Backend | OnAreaChanged |
| Clear | Bits | OnPixelCombine |
| Create | Clipping | |
| Destroy | ClipRect | |
| Draw | CombineMode | |
| DrawTo | DrawMode | |
| Empty | MasterAlpha | |
| EndMeasuring | MeasuringMode | |
| FillRect | OuterColor | |
| FlipHorz | PenColor | |
| FlipVert | Pixel | |
| FrameRect | PixelPtr | |
| GetStippleColor | Resampler | |
| HorzLine | ResamplerClassName | |
| Line | ScanLine | |
| LineTo | StippleCounter | |
| LoadFromFile | StippleStep | |
| LoadFromStream | StretchFilter | |
| MoveTo | WrapMode | |
| RaiseRectTS | ||
| ResetAlpha | ||
| ResetClipRect | ||
| Roll | ||
| Rotate | ||
| SaveToFile | ||
| SaveToStream | ||
| SetPixel | ||
| SetSize | ||
| SetStipple | ||
| VertLine | ||
| In TCustomMap: | ||
| Delete | Height | OnResize |
| Resized | Width | |
| In TThreadPersistent: | ||
| Lock | LockCount | |
| Unlock | ||
| In TNotifiablePersistent: | ||
| BeginUpdate | UpdateCount | OnChange |
| Changed | ||
| EndUpdate | ||
TCustomMap, TNotifiablePersistent, TThreadPersistent, TImage32, TBitmapLayer
Copyright ©2000-2024 Alex Denisov and the Graphics32 Team - Graphics32 2.0 - Help file built on 18 Feb 2024