John Beard 6f78bb6960 Add configuration of Hi-DPI canvas scaling in OpenGL ... First, add automatic detection of toolkit DPI scaling options. For now, this is, in order, * Check the GDK_SCALE option under GTK+ (users can set this to force the scaling) * Check the value from WX's GetContentScalingFactor(). This will start to work correctly from WX 3.1 and GTK+ 3.10. Then, add a user-settable override in the main prefs panel, next to the icon scaling. This is independent of the icon scaling options. DPI handling is performed in a standalone class, so they can be shared between the prefs UI and the OpenGL backend easily. Also means Cairo could use the same interface in future. Also adjust the OpenGL grid drawing code to use the computed scale factor, which avoids over-thick grids in scaled environments (the user can manually thicken the grid if wanted). Fixes: lp:1797308 * https://bugs.launchpad.net/kicad/+bug/1797308 Cherry-pick of: 567bdd9b9 (master)		2019-03-25 15:16:18 +00:00
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cairo	Print on Linux: use 600 DPI instead of the default 72 DPI (noticeable in Pcbnew)	2019-03-17 20:52:42 +01:00
opengl	Add configuration of Hi-DPI canvas scaling in OpenGL	2019-03-25 15:16:18 +00:00
color4d.cpp	colors: Add HSL conversion and tune colors	2019-02-11 22:08:41 -08:00
gal_display_options.cpp	Add configuration of Hi-DPI canvas scaling in OpenGL	2019-03-25 15:16:18 +00:00
graphics_abstraction_layer.cpp	grid: Set grid to use integer pixels	2019-02-23 19:27:45 -08:00
hidpi_gl_canvas.cpp	Add configuration of Hi-DPI canvas scaling in OpenGL	2019-03-25 15:16:18 +00:00
stroke_font.cpp	More performance enhancements.	2018-08-06 13:49:27 +01:00