diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cmd/devdraw/cocoa-screen.m | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/cmd/devdraw/cocoa-screen.m b/src/cmd/devdraw/cocoa-screen.m index c6389e9b..f7718612 100644 --- a/src/cmd/devdraw/cocoa-screen.m +++ b/src/cmd/devdraw/cocoa-screen.m @@ -396,6 +396,14 @@ initimg(void) [win.img setSize: ptsize]; win.topixelscale = size.width / ptsize.width; win.topointscale = 1.0f / win.topixelscale; + + // NOTE: This is not really the display DPI. + // On retina, topixelscale is 2; otherwise it is 1. + // This formula gives us 220 for retina, 110 otherwise. + // That's not quite right but it's close to correct. + // http://en.wikipedia.org/wiki/List_of_displays_by_pixel_density#Apple + displaydpi = win.topixelscale * 110; + return i; } |