fix black edge line issue when image is smaller

Author: noogen

README.md

@@ -7,7 +7,7 @@ Nginx module - https://github.com/niiknow/docker-nginx-image-proxy/blob/master/b
 
 Original File - https://github.com/niiknow/docker-nginx-image-proxy/blob/master/build/src/http/modules/ngx_http_image_filter_module.c
 
-Patch creation: `diff -u src/http/modules/ngx_http_image_filter_module.c ngx_http_image_filter_module.c > image_filter.patch`
+Patch creation: `diff -u build/src/http/modules/ngx_http_image_filter_module.c build/ngx_http_image_filter_module.c > build/image_filter.patch`
 
 Patch apply with: `patch src/http/modules/ngx_http_image_filter_module.c image_filter.patch`
 

build/image_filter.patch

@@ -1,5 +1,5 @@
---- src/http/modules/ngx_http_image_filter_module.c	2019-09-24 15:35:32.000000000 -0500
-+++ ngx_http_image_filter_module.c	2019-09-24 15:38:46.000000000 -0500
+--- build/src/http/modules/ngx_http_image_filter_module.c	2019-09-24 15:35:32.000000000 -0500
++++ build/ngx_http_image_filter_module.c	2022-01-11 12:32:00.000000000 -0600
 @@ -10,7 +10,7 @@
  #include <ngx_http.h>
 
@@ -324,7 +324,7 @@
      if (!ctx->force
          && ctx->angle == 0
          && (ngx_uint_t) sx <= ctx->max_width
-@@ -872,6 +1003,63 @@
+@@ -872,6 +1003,65 @@
 
  transparent:
 
@@ -376,6 +376,8 @@
 +            }
 +        }
 +
++        // white background 
++        // gdImageFill(dst, 0, 0, gdImageColorAllocate(dst, 255, 255, 255));
 +        my_resize(src, dst);
 +        // set the new original
 +        gdImageDestroy(src);
@@ -388,7 +390,7 @@
      gdImageColorTransparent(src, -1);
 
      dx = sx;
-@@ -901,7 +1089,23 @@
+@@ -901,7 +1091,23 @@
 
          resize = 0;
 
@@ -413,7 +415,18 @@
              if ((ngx_uint_t) dx > ctx->max_width) {
                  dy = dy * ctx->max_width / dx;
                  dy = dy ? dy : 1;
-@@ -989,7 +1193,9 @@
+@@ -931,7 +1137,9 @@
+             gdImageAlphaBlending(dst, 0);
+         }
+ 
+-        gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy);
++        // gdImageFill(dst, 0, 0, gdImageColorAllocate(dst, 255, 255, 255));
++
++        gdImageCopyResampled(dst, src, 0, 0, 0, 0, ceil(dx), ceil(dy), sx, sy);
+ 
+         if (colors) {
+             gdImageTrueColorToPalette(dst, 1, 256);
+@@ -989,7 +1197,9 @@
          }
      }
 
@@ -424,7 +437,7 @@
 
          src = dst;
 
-@@ -1016,8 +1222,24 @@
+@@ -1016,8 +1226,24 @@
                  return NULL;
              }
 
@@ -451,15 +464,15 @@
 
              ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                             "image crop: %d x %d @ %d x %d",
-@@ -1048,6 +1270,7 @@
+@@ -1048,6 +1274,7 @@
      }
 
      gdImageInterlace(dst, (int) conf->interlace);
 +    ngx_http_image_watermark(r, conf, dst);
 
      out = ngx_http_image_out(r, ctx->type, dst, &size);
 
-@@ -1122,6 +1345,20 @@
+@@ -1122,6 +1349,20 @@
  #endif
          break;
 
@@ -480,7 +493,7 @@
      default:
          failed = "unknown image type";
          break;
-@@ -1171,14 +1408,37 @@
+@@ -1171,14 +1412,37 @@
      u_char                        *out;
      ngx_int_t                      q;
      ngx_http_image_filter_conf_t  *conf;
@@ -520,7 +533,7 @@
          q = ngx_http_image_filter_get_value(r, conf->jqcv, conf->jpeg_quality);
          if (q <= 0) {
              return NULL;
-@@ -1195,13 +1455,11 @@
+@@ -1195,13 +1459,11 @@
 
      case NGX_HTTP_IMAGE_PNG:
          out = gdImagePngPtr(img, size);
@@ -535,7 +548,7 @@
          q = ngx_http_image_filter_get_value(r, conf->wqcv, conf->webp_quality);
          if (q <= 0) {
              return NULL;
-@@ -1214,6 +1472,22 @@
+@@ -1214,6 +1476,22 @@
  #endif
          break;
 
@@ -558,7 +571,7 @@
      default:
          failed = "unknown image type";
          break;
-@@ -1263,7 +1537,27 @@
+@@ -1263,7 +1541,27 @@
 
      n = ngx_atoi(value->data, value->len);
 
@@ -587,7 +600,7 @@
          return (ngx_uint_t) n;
      }
 
-@@ -1299,9 +1593,13 @@
+@@ -1299,9 +1597,13 @@
      conf->jpeg_quality = NGX_CONF_UNSET_UINT;
      conf->webp_quality = NGX_CONF_UNSET_UINT;
      conf->sharpen = NGX_CONF_UNSET_UINT;
@@ -601,7 +614,7 @@
 
      return conf;
  }
-@@ -1364,6 +1662,37 @@
+@@ -1364,6 +1666,37 @@
      ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
                                1 * 1024 * 1024);
 
@@ -639,7 +652,7 @@
      return NGX_CONF_OK;
  }
 
-@@ -1662,6 +1991,66 @@
+@@ -1662,6 +1995,66 @@
  }
 
 
@@ -706,7 +719,7 @@
  static ngx_int_t
  ngx_http_image_filter_init(ngx_conf_t *cf)
  {
-@@ -1673,3 +2062,109 @@
+@@ -1673,3 +2066,113 @@
 
      return NGX_OK;
  }
@@ -785,6 +798,10 @@
 +        offset = (int)((requestedLength - calculatedLength) / 2);
 +    }
 +
++    if (offset < 0) {
++      offset = 0;
++    }
++
 +    return (offset);
 +}
 +
@@ -797,10 +814,10 @@
 +    int destinationY = destination->sy;
 +
 +    if (destinationRatio > originalRatio) {
-+        destinationX = floor(destination->sy * originalRatio);
++        destinationX = ceil(destination->sy * originalRatio);
 +    }
 +    else {
-+        destinationY = floor(destination->sx / originalRatio);
++        destinationY = ceil(destination->sx / originalRatio);
 +    }
 +
 +    gdImageCopyResampled(

build/ngx_http_image_filter_module.c

@@ -1051,6 +1051,8 @@ ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
             }
         }
 
+        // white background 
+        // gdImageFill(dst, 0, 0, gdImageColorAllocate(dst, 255, 255, 255));
         my_resize(src, dst);
         // set the new original
         gdImageDestroy(src);
@@ -1135,7 +1137,9 @@ ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
             gdImageAlphaBlending(dst, 0);
         }
 
-        gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy);
+        // gdImageFill(dst, 0, 0, gdImageColorAllocate(dst, 255, 255, 255));
+
+        gdImageCopyResampled(dst, src, 0, 0, 0, 0, ceil(dx), ceil(dy), sx, sy);
 
         if (colors) {
             gdImageTrueColorToPalette(dst, 1, 256);
@@ -2137,6 +2141,10 @@ static int my_offset(int calculatedLength, int requestedLength) {
         offset = (int)((requestedLength - calculatedLength) / 2);
     }
 
+    if (offset < 0) {
+      offset = 0;
+    }
+
     return (offset);
 }
 
@@ -2149,10 +2157,10 @@ static void my_resize (gdImagePtr original, gdImagePtr destination) {
     int destinationY = destination->sy;
 
     if (destinationRatio > originalRatio) {
-        destinationX = floor(destination->sy * originalRatio);
+        destinationX = ceil(destination->sy * originalRatio);
     }
     else {
-        destinationY = floor(destination->sx / originalRatio);
+        destinationY = ceil(destination->sx / originalRatio);
     }
 
     gdImageCopyResampled(

files/root/bin/my-startup.sh

@@ -26,5 +26,10 @@ fi
 echo "*** Running cron"
 cron 
 
+# now=$(date +"%T")
+# echo "Current time : $now"
+
+ls -la /root/bin
+
 echo "*** Running nginx"
 exec /usr/sbin/nginx -g "daemon off;"