Hi After testing the new OpenGL renderer on Eeschema I did some comparisons and tried to find ways for improvement. The speed improvement is enormous as expected. Thanks!
The attached screenshot compares Eeschema and Gschem rendering of similar features. It is clear that Gschem grid fits everything on pixel centres and pushes the rounding error to "white space". Everything but grid fit lines is anti-aliased and nothing is scaled after rasterisation. In general MSAA is not good for anti-aliasing of line drawing vector source data. With vectors the AA is part of the rasterisation, not something to do afterwards as the group of pixels that resulted from rasterisation have already lost the meaning what they were about to represent, so the quality is lost. Especially pixel grid fitting is lost on scaling that shows as fuzzy lines in the example. A couple of links regarding anti-aliased lines and arcs just in case they were not found already: https://blog.mapbox.com/drawing-antialiased-lines-with-opengl-8766f34192dc https://github.com/glslify/glsl-circular-arc I also remember the ocassional talk about Qt and by the effort that goes to working around wx bugs and non-features something else could be done on Qt. The OpenGL accelerated QPainter is pretty convincing these days. Instead of deepfakes the wx to Qt porting AI would be more productive... -Vesa
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