Re: [ft-devel] harmonize conic and cubic splines
I am sorry to say that I regard a 3% slowdown as intolerable, especially for my purposes. I haven't noticed any quality problems with the existing code. We can define quality as the inverse of the maximum distance of the generated line segments from the actual curve; that can be adjusted using the existing algorithm, in any case. The aim of code improvement in this area is to improve speed while preserving quality. Graham - Original Message From: Алексей Подтележников apodt...@gmail.com To: freetype-devel freetype-devel@nongnu.org Sent: Monday, 18 October, 2010 4:37:52 Subject: [ft-devel] harmonize conic and cubic splines Werner, This patch harmonizes the algorithms that are used for flattening conic and cubic splines. It changes the conic ones to follow the same (more correct) procedure as cubic ones. The result, I think, is a better code and a slight improvement in quality. You may see about 3% slow-down, but this can be ironed out. Alexei ___ Freetype-devel mailing list Freetype-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] harmonize conic and cubic splines
Graham, Let's work on ironing out the wrinkles and fine tuning ONE_PIXEL fraction, so that the code works best for freetype's purposes as well as yours. It is undeniable that it is so much better to have the same algorithm in both conic and cubic splines long term. Alexei 2010/10/18 GRAHAM ASHER graham.as...@btinternet.com: I am sorry to say that I regard a 3% slowdown as intolerable, especially for my purposes. I haven't noticed any quality problems with the existing code. We can define quality as the inverse of the maximum distance of the generated line segments from the actual curve; that can be adjusted using the existing algorithm, in any case. The aim of code improvement in this area is to improve speed while preserving quality. Graham - Original Message From: Алексей Подтележников apodt...@gmail.com To: freetype-devel freetype-devel@nongnu.org Sent: Monday, 18 October, 2010 4:37:52 Subject: [ft-devel] harmonize conic and cubic splines Werner, This patch harmonizes the algorithms that are used for flattening conic and cubic splines. It changes the conic ones to follow the same (more correct) procedure as cubic ones. The result, I think, is a better code and a slight improvement in quality. You may see about 3% slow-down, but this can be ironed out. Alexei -- Alexei A. Podtelezhnikov, PhD ___ Freetype-devel mailing list Freetype-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] harmonize conic and cubic splines
It is undeniable that it is so much better to have the same algorithm in both conic and cubic splines long term. Is it? I can imagine that two completely different algorithms are best. Cubic and conic curves *are* different beasts... Werner ___ Freetype-devel mailing list Freetype-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] harmonize conic and cubic splines
On Mon, Oct 18, 2010 at 10:47 AM, Werner LEMBERG w...@gnu.org wrote: Is it? I can imagine that two completely different algorithms are best. Cubic and conic curves *are* different beasts... .. but I managed to quite successfully use essentially the same algorithm for both. Regardless of our disagreement, we still need to fix the bug that conic splines use ONE_PIXEL before upscaling, which is wrong. Alexei ___ Freetype-devel mailing list Freetype-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/freetype-devel
