From: sgunderson@bigfoot.com <>
Date: Sun, 31 May 2009 19:18:50 +0000 (+0200)
Subject: Do some manual strength reduction.
X-Git-Url: https://git.sesse.net/?p=fjl;a=commitdiff_plain;h=9d977ffbb1bc9cfe41d5e074de51bb9d7bed96d7;ds=inline

Do some manual strength reduction.
---

diff --git a/driver.c b/driver.c
index b12b226..04e2369 100644
--- a/driver.c
+++ b/driver.c
@@ -194,13 +194,11 @@ void read_scan(struct byte_source* source, struct jpeg_image* image, huffman_tab
 					uint8_t pixdata[DCTSIZE2];	
 					idct_choice(coeff, image->idct_data[image->qtable[cn]], pixdata);
 
-					for (unsigned y = 0; y < DCTSIZE; ++y) {
-						unsigned real_x = (mcu_x * image->hsample[cn] + local_xb) * DCTSIZE;
-						unsigned real_y = (mcu_y * image->vsample[cn] + local_yb) * DCTSIZE + y;
-					
-						memcpy(image->pixel_data[cn] + real_y * stride + real_x,
-						       pixdata + y * DCTSIZE,
-						       DCTSIZE);
+					unsigned real_x = (mcu_x * image->hsample[cn] + local_xb) * DCTSIZE;
+					unsigned real_y = (mcu_y * image->vsample[cn] + local_yb) * DCTSIZE;
+					uint8_t* dest_pixdata = image->pixel_data[cn] + real_y * stride + real_x;
+					for (unsigned y = 0; y < DCTSIZE; ++y, dest_pixdata += stride) {
+						memcpy(dest_pixdata, pixdata + y * DCTSIZE, DCTSIZE);
 					}
 				}
 			}