Merge pull request #132 from stlk/feature/keep-rotation

Maintant orientation specified in EXIF data

img.js

@@ -388,6 +388,14 @@ class Image {
     let results = [];
     let outputFormats = Image.getFormatsArray(this.options.formats, metadata.format || this.options.overrideInputFormat);
 
+    // Orientation 5 to 8 means dimensions are fliped
+    if (metadata.orientation >= 5) {
+      let height = metadata.height;
+      let width = metadata.width;
+      metadata.width = height;
+      metadata.height = width;
+    }
+
     for(let outputFormat of outputFormats) {
       if(!outputFormat || outputFormat === "auto") {
         throw new Error("When using statsSync or statsByDimensionsSync, `formats: [null | auto]` to use the native image format is not supported.");
@@ -458,7 +466,10 @@ class Image {
           if(metadata.format !== "svg" || !this.options.svgAllowUpscale) {
             resizeOptions.withoutEnlargement = true;
           }
+          sharpInstance.rotate();
           sharpInstance.resize(resizeOptions);
+        } else if (stat.width === metadata.width && metadata.format !== "svg") {
+          sharpInstance.rotate();
         }
 
         if(!this.options.dryRun) {

test/test.js

@@ -240,6 +240,18 @@ test("Use exact same width as original", async t => {
   t.is(stats.jpeg[0].width, 1280);
 });
 
+test("Maintains orientation", async t => {
+  let stats = await eleventyImage("./test/orientation.jpg", {
+    widths: [151],
+    formats: ["jpeg"],
+    outputDir: "./test/img/"
+  });
+
+  t.is(stats.jpeg.length, 1);
+  t.is(stats.jpeg[0].width, 76);
+  t.is(stats.jpeg[0].height, 151);
+});
+
 test("Try to use a width larger than original (statsSync)", t => {
   let stats = eleventyImage.statsSync("./test/bio-2017.jpg", {
     widths: [1500],