Cairo Polyline and Polygon draw functions share a common routine. While
Polygons must have 3 points to allow triangulation, a polyline (like our
text) need only have 2
This resolves a crash when passing an empty polygon and alerts debug
users to possible generation cases when bad polygons are created.
Thanks for Frans Zellman
(https://gitlab.com/kicad/code/kicad/-/merge_requests/365) for
identifying the issue.
The base GAL has the linewidth property already, and its
accessor will only return the base version. This was causing
problems with the Cairo printing GAL, since that setter wasn't
using the base class version. Also, this removes the print-specific
setter, since the actual setting of line width shouldn't be done
there and is instead done where the drawing happens.
Fixes https://gitlab.com/kicad/code/kicad/issues/5089
* Split up the thirdparty code into the thirdparty folder (#3637)
* Create a new kimath static library containing all the math functions
This is part of cleaning the build system for #1906.
Previously, a 600 DPI was used to set device scale (can create minor visible rounding issues).
Using now 4800 DPI to reduce these rounding artifacts.
Fixes: lp:1845229
https://bugs.launchpad.net/kicad/+bug/1845229
It was due to a angle normalization between -360 and 360 degrees.
So, in arcs, if the start angle and end angle diff is n*360 deg,
this normalization gives start angle = end angle.
The fix forces end angle = start angle+360deg in this case.
Fixes: lp:1832096
https://bugs.launchpad.net/kicad/+bug/1832096
This allows a const BITMAP_BASE to expose const image
data. This is currently done with const_casts, which is
"OK", only as long as the source image is not declared
const, in which case it's undefined behaviour.
Also immediately dereference the pointer to a reference
if it's not checked to make the non-null requirements
explicit at the point of access.
Both Cairo and OpenGL had issues (different, though) with circles that are
thicker in line width than they have radius. This corrects the OpenGL
implementation (radius is calculated to the outer edge) as well as Cairo
(line width needs to be clamped to twice the radius)
Fixes: lp:1822765
* https://bugs.launchpad.net/kicad/+bug/1822765
In Symbol editor, axis are always shown. However after switching the backend, axis were no longer drawn.
In Cairo engine, fix a bug preventing axis to be shown.
We shouldn't adjust the pixel size of the grid based on alignment in
GAL. This creates artifacts on the screen at different zoom levels.
The pixel width is fixed by grid size preference
Also clean a left-over debug statement
Fixes: lp:1817377
* https://bugs.launchpad.net/kicad/+bug/1817377
Arc pixel adjustment needs to be limited to +/-1 pixel. But making this
adjustment to nearby points and then using the projection to correct the
center point accumulates errors that are large for angles near 0 and
near 360. This is a compromise that aligns _most_ arcs and provides
stable generation for all angles.
Fixes: lp:1817226
* https://bugs.launchpad.net/kicad/+bug/1817226
Pixel alignment is not required for track outline mode. It creates
differences between segment and radius calculations.
Also add specific width of the outlines
gal: pixel alignment for Cairo.
gal: pixel alignment for OpenGL
Cleanup of pixel alignment patches
gal/opengl: more pixel alignment patches:
- works on Retina displays now
- pixel alignment for circles
- correct 1-pixel strokes
- fixed unfinished 1-pixel line ends
GAL: Restore antialiasing options in Cairo
GAL: Fix arc drawing
Removes DrawArcSegment, which drew arcs whose edge was optionally
stroked (a feature that we did not use). Fixes Cairo arc drawing issue
where arcs were not visible in pcbnew.
gal: further cleanup
gal: removed unused shader parameter
Bitmaps loaded via wx can contain alpha channels. We utilize underlying
routines to correctly map the alpha. This also standardizes the Cairo
alpha calls to ensure correct display in Fallback for partially
transparent highlights
Fixes: lp:1809845
* https://bugs.launchpad.net/kicad/+bug/1809845
Cairo supports antialiasing when rendering but can be slow when set to
sub-pixel mode. This bumps the minimum version of Cairo to 1.12
(available in 14.04 LTS as well as mingw) to support three antialias
settings (fast, good, best) that offer speed/appearance tradeoffs.
This can provide a higher-quality eeschema render as it works on a
per-element basis as opposed to the OpenGL per-screen antialias.
Display GALs had an incorrect world unit value set. Now the world unit
value says how many internal units are in an inch, in accord with the comments
in the GAL header. Bitmap drawing code relied on the information about DPI,
so scaling worked differently for display and print GALs.
Mikolaj Wielgus
Seth Hillbrand
Ian McInerney
jean-pierre charras
Jon Evans
Marcus Comstedt
Seth Hillbrand
Simon Richter
John Beard
Tomasz Włostowski
Maciej Suminski