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Greyscale library: * Implement linearisation curve flipping for 1st/2nd Gen iPods (LCD is inverted when backlight is on, so the curve is also inverted). This needs a slight extension of is_backlight_on() functionality in the core. * Thorough recalibration of all reachable greyscale targets, and #ifdef cleanup. * Reduce on-target gamma a bit, because the displayable contrast range of a monochrome/greyscale isn't that high.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16936 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2008-04-02 22:16:14 +00:00
parent cdae493f96
commit 5c87a98b97
9 changed files with 313 additions and 229 deletions
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11
apps/plugins/lib/grey.h
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@ -120,9 +120,16 @@ void grey_ub_scroll_down(int count);
/*** Internal stuff ***/
/* standard gamma (s23p8) */
#ifdef SIMULATOR /* Standard PC gamma */
#define _GREY_GAMMA ((200<<8)/100)
#else /* Target LCDs have a smaller contrast range */
#define _GREY_GAMMA ((180<<8)/100)
#endif
/* flag definitions */
#define _GREY_RUNNING 0x0001 /* greyscale overlay is running */
#define _GREY_DEFERRED_UPDATE 0x0002 /* lcd_update() requested */
#define _GREY_RUNNING 0x8000 /* greyscale overlay is running */
#define _GREY_DEFERRED_UPDATE 0x4000 /* lcd_update() requested */
/* fast unsigned multiplication (16x16bit->32bit or 32x32bit->32bit,
* whichever is faster for the architecture) */