# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1335034941 0
# Node ID 084137d883ecf0f85404ff4ef081c95ce6830633
# Parent  f1a7633b20a4219a4cda9d5e36bfae624c49d9a9
Image filter: compare aspect ratio more accurately during crop.

Previously used fixed-point calculation caused wrong code path selection
in some cases, resulting in incorrect image size.

See here for report:
http://mailman.nginx.org/pipermail/nginx-devel/2012-April/002123.html

diff -r f1a7633b20a4 -r 084137d883ec src/http/modules/ngx_http_image_filter_module.c
--- a/src/http/modules/ngx_http_image_filter_module.c	Thu Apr 19 15:48:03 2012 +0000
+++ b/src/http/modules/ngx_http_image_filter_module.c	Sat Apr 21 19:02:21 2012 +0000
@@ -817,9 +817,7 @@
 
         resize = 0;
 
-        if ((ngx_uint_t) (dx * 100 / dy)
-            < ctx->max_width * 100 / ctx->max_height)
-        {
+        if ((double) dx / dy < (double) ctx->max_width / ctx->max_height) {
             if ((ngx_uint_t) dx > ctx->max_width) {
                 dy = dy * ctx->max_width / dx;
                 dy = dy ? dy : 1;