NGX_HTTP_IMAGE_PNG  443 src/http/modules/ngx_http_image_filter_module.c         return NGX_HTTP_IMAGE_PNG;
NGX_HTTP_IMAGE_PNG  723 src/http/modules/ngx_http_image_filter_module.c     case NGX_HTTP_IMAGE_PNG:
NGX_HTTP_IMAGE_PNG 1041 src/http/modules/ngx_http_image_filter_module.c     case NGX_HTTP_IMAGE_PNG:
NGX_HTTP_IMAGE_PNG 1117 src/http/modules/ngx_http_image_filter_module.c     case NGX_HTTP_IMAGE_PNG: