Thanks for the help. I was able to make a little progress. >There is another agg unit agg_pixfmt_rgb_packed that seem to have the >565 format that you need. Add it to the uses list and try to replace the >pixfmt_rgba32 calls with pixfmt_rgb565. That will make agg use that format. >The pixfmt_custom_blend_rgba calls may need further hacking too to make things >work, however, Agg2D should use a 16 bit format if you use >pixfmt_rgb565 callse instead of pixfmt_rgba32. You should also set RGBA_Width >=2; in your program to reflect the change.
I did as you suggest here and changed my buffer to be an array of words, and I am able to get a representation of the image to screen by reading elements of the array and using putpixel() to put them on the screen, however the colors are all wrong. I am wondering if this m_pixformat variable that shows up everywhere needs to be set also? The pixfmt_custom_blend_rgba calls may also be the problem with the colors. There are no corresponding custom blend procedures in agg_pixfmt_rgb_packed. >Anyway, this will probably still not make >ptcgraph.putimage(0,0,buf[0],0); No this still does not work, I am able to use a nested loop and putpixel() but that is very slow. I still think something is missing with putimage because I don't see how it knows the shape of the image, maybe I need to actually do a getimage() at some point to set the shape of before putimage will work.. I'll do some experiments with it. James -----Original Message----- From: fpc-pascal [mailto:fpc-pascal-boun...@lists.freepascal.org] On Behalf Of Stefan V. Pantazi Sent: Thursday, June 01, 2017 9:47 AM To: FPC-Pascal users discussions <fpc-pascal@lists.freepascal.org> Subject: Re: [fpc-pascal] Implementing AggPas with PtcGraph Have a look at the agg_2D unit. The agg_2D uses .. agg_pixfmt , agg_pixfmt_rgba , .. Therefore, the rgba format is pretty much baked in. That is to say that the constructor of the main object Agg2D uses the pixfmt_rgba32 to set the pixel format. ... { CONSTRUCT } constructor Agg2D.Construct; begin m_rbuf.Construct; pixfmt_rgba32 (m_pixFormat ,@m_rbuf ); pixfmt_custom_blend_rgba(m_pixFormatComp ,@m_rbuf ,@comp_op_adaptor_rgba ,rgba_order ); pixfmt_rgba32 (m_pixFormatPre ,@m_rbuf ); pixfmt_custom_blend_rgba(m_pixFormatCompPre ,@m_rbuf ,@comp_op_adaptor_rgba ,rgba_order ); ... There is another agg unit agg_pixfmt_rgb_packed that seem to have the 565 format that you need. Add it to the uses list and try to replace the pixfmt_rgba32 calls with pixfmt_rgb565. That will make agg use that format. The pixfmt_custom_blend_rgba calls may need further hacking too to make things work, however, Agg2D should use a 16 bit format if you use pixfmt_rgb565 callse instead of pixfmt_rgba32. You should also set RGBA_Width =2; in your program to reflect the change. Anyway, this will probably still not make ptcgraph.putimage(0,0,buf[0],0); work, but that may be a ptcgraph problem. Hope this helps, Stefan On 05/31/2017 02:57 PM, James Richters wrote: >> And AggPas already has support for that pixel format > > How do I define that as the format I want? I've been looking all through the > example and do not see how this is defined. I've attached a test program, > it's basically Graeme's sample but going to screen instead of a file. I just > don't see where the pixel format is defined. I have it kind of working in a > funny way by just forcing the existing pixels to conform to the required > format. > > -----Original Message----- > From: fpc-pascal [mailto:fpc-pascal-boun...@lists.freepascal.org] On > Behalf Of Graeme Geldenhuys > Sent: Wednesday, May 31, 2017 1:17 PM > To: fpc-pascal@lists.freepascal.org > Subject: Re: [fpc-pascal] Implementing AggPas with PtcGraph > > On 2017-05-31 18:03, Reimar Grabowski wrote: >>> I'm not sure what that's called >> RGB565, maybe? > > And AggPas already has support for that pixel format. > > Regards, > Graeme > > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal > > > > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal > _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
