On Sat, 16 Feb 2008 13:34:32 +0100 Marco van de Voort <[EMAIL PROTECTED]> wrote:
>[...] > > > For now I'm only playing ad exploring, and even if I start to get > > > serious, it will be a branch at first. So no panic and running for > > > the door please :-) > > > > > > Does sb know on what fpimage properties lazarus exactly depends? > > > > If you mean TFPCustomImage: Almost every property. The Extra* > > properties are used only by some readers/writers that are used by > > the LCL. So this is an indirect dependency. > > > TLazIntfImage = class(TFPCustomImage) > > > > > Are there hidden assumptions on internal format (mostly being it > > > always 32bpp?) > > > > I didn't even know that fpimage has an internal format. > > Depends on what you see as fpimage. TFPCustomImage is the abstract > ancestor, TFPMemoryImage the one with actual storage. I see. > In this context one should also see my "which properties" question. > If I expand TFPMemoryImage with scanline (because it has storage), I > couldn't use it in the readers or writers, because then they wouldn't > work anymore with tlazintfimage. So more or less you confirmed my > doubts, Lazarus is not using TFPMemoryImage. Correct. TFPMemoryImage knows only one format. The LCL needs a flexible one, that supports at least all memory formats of all widgetsets - which afaik excludes only compressed and floating point memory formats. > So probably the ancestor class should get a scanline property with > some abstract methods, and TLazIntfImage needs to override that too. TLazIntfImage.GetDataLineStart? Mattias _______________________________________________ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
