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iAudio M3: Optimised LCD driver, with more/better assembly code. Speedup is ~80% when boosted, ~15% when unboosted. Also implemented grey phase blitting. * Adapted the greyscale library, and the plugins using it. * Fixed a bug in greyscale scroll down for vertically packed pixels.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16809 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2008-03-25 23:21:36 +00:00
parent 6ceaf321f3
commit 40919d7db2
20 changed files with 744 additions and 315 deletions
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11
apps/plugins/lib/grey_scroll.c
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@ -191,7 +191,8 @@ void grey_ub_scroll_up(int count)
_grey_info.fg_brightness :
_grey_info.bg_brightness];
#if LCD_PIXELFORMAT == VERTICAL_PACKING
#if (LCD_PIXELFORMAT == VERTICAL_PACKING) \
|| (LCD_PIXELFORMAT == VERTICAL_INTERLEAVED)
if (count & _GREY_BMASK)
{
/* Scrolling by fractional blocks - move pixel wise. */
@ -262,7 +263,8 @@ void grey_ub_scroll_down(int count)
_grey_info.fg_brightness :
_grey_info.bg_brightness];
#if LCD_PIXELFORMAT == VERTICAL_PACKING
#if (LCD_PIXELFORMAT == VERTICAL_PACKING) \
|| (LCD_PIXELFORMAT == VERTICAL_INTERLEAVED)
if (count & _GREY_BMASK)
{
/* Scrolling by fractional blocks - move pixel wise. */
@ -302,6 +304,9 @@ void grey_ub_scroll_down(int count)
}
while (dst < line_end);
}
/* Top pixel in a block has the highest address, but dst must point
* to the lowest address in that block for the subsequent fill. */
dst -= _GREY_BMASK;
}
else
#endif
@ -311,7 +316,7 @@ void grey_ub_scroll_down(int count)
dst -= blen;
_grey_info.rb->memmove(dst, start, blen);
}
_grey_info.rb->memset(start, blank, dst - start);
_grey_info.rb->memset(start, blank, dst - start);
/* Fill remainder at once. */
#ifdef SIMULATOR
_grey_info.rb->sim_lcd_ex_update_rect(_grey_info.x, _grey_info.y,