'exception' class

[Alexey-T]

in unitbitmapgeneric.inc we have 3 'exception.create()`. would be better to use uniq class instead of 'exception'. eg in IDE i will be able to set 'Ignore errors of this class' UI option.

and: typo 'Semi-tranparent

[circular17]

Hi Alexey,

I am not sure what would be the change for the exception. Can you show me?

[Alexey-T]

type
  TBgraException = class(Exception);

...
  raise TBgraException.Create('text here');

[circular17]

I see, why not

[circular17]

Hi Alexey,

Reflecting on your suggestion, it seems that for exception, there is a convention to prefix with E. So I presume we could define following exceptions:

• EBGRAError generic exception for everything in BGRABitmap (including bitmaps with other pixel fromats and things not strictly speaking bitmaps)
• EIndexError for errors 'Index out of bounds' in any context

Other exceptions would be descendants:

• EColorspaceError for errors related to colorspaces
• EUniversalBitmapError for errors in ancestors of TBGRACustomBitmap
• EBGRABitmapError for errors specific to TBGRACustomBitmap and its descendants (except TBGLBitmap)
• EGrayscaleBitmapError for errors specific to TGrayscaleBitmap
• ELayeredBitmapError for errors related in BGRALayers and layered image formats
• EUnicodeTextError for errors related to Unicode/UTF8 (BGRATextBidi and BGRAUnicodeText units)
• EMultifileContainerError for errors related to multifile containers (BGRAMultifileType, BGRAMemDirectory units)
• EGeometryError for errors related to paths and other geometric types
• EGradientError for errors about gradients
• ESVGError for errors related to SVG format
• EAvifException for errors related to AVIF format (name is already defined with Exception in it)
• EBGRAGifError for errors related to GIFs (BGRAAnimatedGif and BGRAGifFormat units)
• EBGRAPaletteError for errors with palettes (BGRAPalette unit)
• EBGRAResampleError for errors related to resampling (BGRAResample unit)
• EBGRADotNotError for errors related to .NET (BGRADotNetDeserial unit)

This would be a descendant of EMultifileContainerError:

• EBGRAIconError for errors related to icons/cursors (BGRAIconCursor unit)
• EWinResourceError (BGRAWinResource unit)

This would be a descendant of EBGRABitmapError:

• EBGRAOpenGLError for errors with OpenGL (BGRAOpenGL, BGRAOpenGL3D, BGRAFontGL, BGRASpriteGL, BGRACanvasGL)

This would be a descendant of ELayeredBitmapError:

• EOpenRasterError (BGRAOpenRaster unit)

I am not sure it convers absolutely everything, however this would give some structure to the exceptions.