X-Git-Url: https://git.sesse.net/?p=fjl;a=blobdiff_plain;f=driver.c;h=04e236912ca45d56bc4f1a34f16b3c04185112d9;hp=b12b226c336dcc29ea9993f521fbd8f393ec8f79;hb=9d977ffbb1bc9cfe41d5e074de51bb9d7bed96d7;hpb=e58d7fc6e17349a9a456632f9403a73262a428e5

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);
 					}
 				}
 			}