Speed up mono bitmap drawing on horizontally packed greyscale targets (greyscale iPods). Average speedup is 80% on PP5002, and 55% on PP502x. * Simplify mono bitmap drawing in the 16 bit driver and the greylib a bit, also giving a slight speedup (3% on PP502x, 1.5% on coldfire).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21163 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 1 insertions, 2 deletions

diff --git a/apps/plugins/lib/grey_draw.c b/apps/plugins/lib/grey_draw.c
index c1e6376cfe..3b81694426 100644
--- a/apps/plugins/lib/grey_draw.c
+++ b/apps/plugins/lib/grey_draw.c
@@ -447,6 +447,7 @@ void grey_mono_bitmap_part(const unsigned char *src, int src_x, int src_y,
     src_end = src + width;
     dwidth  = _grey_info.width;
     dst     = &_grey_info.buffer[_GREY_MULUQ(dwidth, y) + x];
+    dst_end = dst + _GREY_MULUQ(dwidth, height);
 
     if (drmode & DRMODE_INVERSEVID)
     {
@@ -461,8 +462,6 @@ void grey_mono_bitmap_part(const unsigned char *src, int src_x, int src_y,
         unsigned data = (*src_col ^ dmask) >> src_y;
         int fg, bg;
 
-        dst_end = dst_col + _GREY_MULUQ(dwidth, height);
-        
 #define UPDATE_SRC  do {                  \
             data >>= 1;                   \
             if (data == 0x001) {          \