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.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16936 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 9 insertions, 2 deletions

diff --git a/apps/plugins/lib/grey.h b/apps/plugins/lib/grey.h
index 4298ae3ada..3d5e6d16c4 100644
--- a/apps/plugins/lib/grey.h
+++ b/apps/plugins/lib/grey.h
@@ -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) */