--- On Thu, 4/21/11, Marco van de Voort <mar...@stack.nl> wrote: > From: Marco van de Voort <mar...@stack.nl> > Subject: Re: [fpc-pascal] FPImage and GetDataLineStart > To: "FPC-Pascal users discussions" <fpc-pascal@lists.freepascal.org> > Date: Thursday, April 21, 2011, 6:41 AM > In our previous episode, Sven Barth > said: > > Am 20.04.2011 22:20, schrieb Leonardo M. Ram?: > > > Hi, I need to write a function that replaces > TLazIntfImage by using fpImage, and I can't find an > alternative to GetDataLineStart. How can I replace it?. > > > > Maybe I get your intention wrong, but TLazIntfImage is > already using > > fpImage and it derives from a TFPCustomImage itself. > > True, but TFPCustomImage is abstact wrt memory layout and > doens't provide > row level access, only pixel level access. > > Only TFPMemoryImage adds the memory access, but IIRC only > 64-bit pixels. > (16-bit RGBA) > > While these abstractions make it easy to make fp/fcl-image > somewhat > complete, they are also very memory hungry and slow. > > IIRC I accelerated loading/saving simple 8-bit BMP images > 20 to 50 times in > my work code. >
Do you care to share some insights about what you did to accelerate it? Leonardo M. Ramé http://leonardorame.blogspot.com _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
