patch 8.0.1369: MS-Windows: drawing underline slow, mFallbackDC not updated
Problem: MS-Windows: drawing underline, curl and strike-throw is slow,
mFallbackDC not properly updated.
Solution: Several performance improvements. (Ken Takata, Taro Muraoka,
Yasuhiro Matsumoto, closes #2401)
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 08bc78d..822e37e 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -6122,9 +6122,10 @@
geom pixelGeometry int 0 - 2 (see below)
renmode renderingMode int 0 - 6 (see below)
taamode textAntialiasMode int 0 - 3 (see below)
+ scrlines Scroll Lines int >= 0 (see below)
- See this URL for detail:
- http://msdn.microsoft.com/en-us/library/dd368190.aspx
+ See this URL for detail (except for scrlines):
+ https://msdn.microsoft.com/en-us/library/dd368190.aspx
For geom: structure of a device pixel.
0 - DWRITE_PIXEL_GEOMETRY_FLAT
@@ -6132,7 +6133,7 @@
2 - DWRITE_PIXEL_GEOMETRY_BGR
See this URL for detail:
- http://msdn.microsoft.com/en-us/library/dd368114.aspx
+ https://msdn.microsoft.com/en-us/library/dd368114.aspx
For renmode: method of rendering glyphs.
0 - DWRITE_RENDERING_MODE_DEFAULT
@@ -6144,7 +6145,7 @@
6 - DWRITE_RENDERING_MODE_OUTLINE
See this URL for detail:
- http://msdn.microsoft.com/en-us/library/dd368118.aspx
+ https://msdn.microsoft.com/en-us/library/dd368118.aspx
For taamode: antialiasing mode used for drawing text.
0 - D2D1_TEXT_ANTIALIAS_MODE_DEFAULT
@@ -6153,7 +6154,25 @@
3 - D2D1_TEXT_ANTIALIAS_MODE_ALIASED
See this URL for detail:
- http://msdn.microsoft.com/en-us/library/dd368170.aspx
+ https://msdn.microsoft.com/en-us/library/dd368170.aspx
+
+ For scrlines: threshold for lines to be scrolled.
+ 0 - Always use scrolling. (default)
+ 1 - Use full page redrawing.
+ > 1 - If the lines to be scrolled is grater or equal to the
+ specified value, use redrawing. Otherwise use
+ scrolling.
+
+ If you feel scrolling a page (CTRL-F) is too slow with DirectX
+ renderer, try this "scrlines" option.
+ When set it "1", Vim uses full page redrawing instead of
+ scrolling. Redrawing a page is faster than scrolling a
+ page in some environments.
+ After that, when you feel scrolling lines (CTRL-Y) becomes
+ slow, please try "2" or greater value for this option.
+ It works threshold line number to switch scrolling to
+ redrawing. Scrolling a few lines might be faster than
+ redrawing a page in some environments.
Example: >
set encoding=utf-8
@@ -6162,13 +6181,12 @@
<
If select a raster font (Courier, Terminal or FixedSys which
have ".fon" extension in file name) to 'guifont', it will be
- drawn by GDI as a fallback. This fallback will cause
- significant slow down on drawing.
+ drawn by GDI as a fallback.
NOTE: It is known that some fonts and options combination
causes trouble on drawing glyphs.
- - 'rendmode:5' and 'renmode:6' will not work with some
+ - 'renmode:5' and 'renmode:6' will not work with some
special made fonts (True-Type fonts which includes only
bitmap glyphs).
- 'taamode:3' will not work with some vector fonts.