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Image filter: compare aspect ratio more accurately during crop.

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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
This commit is contained in:
Maxim Dounin 2012-04-21 19:02:21 +00:00
parent e8fe3ce098
commit 8b89c882ce
1 changed files with 1 additions and 3 deletions
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4
src/http/modules/ngx_http_image_filter_module.c
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@ -817,9 +817,7 @@ transparent:
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;