Use pre-multiplication in scaler to save one multiply per color component on ARM and Coldfire, at the cost of an extra add/shift in the horizontal scaler to reduce values to a workable range. SH-1 retains the same basic math, as

the use of 16x16->32 hardware multiplication in the earlier scaler stages saves more than removing the 32x32->40 multiply to descale output.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21091 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 1 insertions, 1 deletions

diff --git a/apps/plugins/lib/grey_draw.c b/apps/plugins/lib/grey_draw.c
index 6315ad9b1a..c1e6376cfe 100644
--- a/apps/plugins/lib/grey_draw.c
+++ b/apps/plugins/lib/grey_draw.c
@@ -733,7 +733,7 @@ static void output_row_grey_32(uint32_t row, void * row_in,
     uint32_t *qp = (uint32_t*)row_in;
     uint8_t *dest = (uint8_t*)ctx->bm->data + ctx->bm->width * row;
     for (col = 0; col < ctx->bm->width; col++)
-        *dest++ = SC_MUL((*qp++) + ctx->round,ctx->divisor);
+        *dest++ = SC_OUT(*qp++, ctx);
 }
 
 static unsigned int get_size_grey(struct bitmap *bm)