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Pixel-accurate (vertical) list scrolling for touchscreen targets.

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Looks much smoother now as you don't scroll by whole lines anymore.
Add some functions lcd driver to enable the line based scrolling engine to draw the lines with a pixel-based y-offset.
This should also allow for a sensible kinetic scrolling mechanism (still a todo).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28214 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-10-06 12:46:42 +00:00
parent 53a936ab83
commit d9d0b4dd20
6 changed files with 139 additions and 44 deletions
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firmware/export/scroll_engine.h
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@ -56,6 +56,7 @@ struct scrollinfo
int y; /* Position of the line on the screen (char co-ordinates) */
int offset;
int startx;
int y_offset; /* y offset of the line, used for pixel-accurate list scrolling */
#ifdef HAVE_LCD_BITMAP
int width; /* length of line in pixels */
int style; /* line style */