Add read support for Radiance .hdr files

src/common.cc

@@ -250,6 +250,7 @@ namespace sharp {
       case ImageType::JXL: id = "jxl"; break;
       case ImageType::VIPS: id = "vips"; break;
       case ImageType::RAW: id = "raw"; break;
+      case ImageType::RAD: id = "rad"; break;
       case ImageType::UNKNOWN: id = "unknown"; break;
       case ImageType::MISSING: id = "missing"; break;
     }
@@ -296,7 +297,9 @@ namespace sharp {
     { "VipsForeignLoadJxlBuffer", ImageType::JXL },
     { "VipsForeignLoadVips", ImageType::VIPS },
     { "VipsForeignLoadVipsFile", ImageType::VIPS },
-    { "VipsForeignLoadRaw", ImageType::RAW }
+    { "VipsForeignLoadRaw", ImageType::RAW },
+    { "VipsForeignLoadRadFile", ImageType::RAD },
+    { "VipsForeignLoadRadBuffer", ImageType::RAD }
   };
 
   /*

src/common.h

@@ -151,6 +151,7 @@ namespace sharp {
     JXL,
     VIPS,
     RAW,
+    RAD,
     UNKNOWN,
     MISSING
   };

src/utilities.cc

@@ -119,7 +119,7 @@ Napi::Value format(const Napi::CallbackInfo& info) {
   Napi::Object format = Napi::Object::New(env);
   for (std::string const f : {
     "jpeg", "png", "webp", "tiff", "magick", "openslide", "dz",
-    "ppm", "fits", "gif", "svg", "heif", "pdf", "vips", "jp2k", "jxl"
+    "ppm", "fits", "gif", "svg", "heif", "pdf", "vips", "jp2k", "jxl", "rad"
   }) {
     // Input
     const VipsObjectClass *oc = vips_class_find("VipsOperation", (f + "load").c_str());

test/fixtures/index.js

@@ -138,6 +138,9 @@ module.exports = {
   testPattern: getPath('test-pattern.png'),
 
   inputPngWithTransparent: getPath('d.png'),
+
+  inputHdr: getPath('rogland_moonlit_night_1k.hdr'), // CC0 https://polyhaven.com/a/rogland_moonlit_night
+
   // Path for tests requiring human inspection
   path: getPath,
 

test/unit/hdr.js

@@ -0,0 +1,36 @@
+'use strict';
+
+const fs = require('fs');
+const assert = require('assert');
+
+const sharp = require('../../');
+const fixtures = require('../fixtures');
+
+describe('RAD', function () {
+  it('Load rad from file', function (done) {
+    sharp(fixtures.inputHdr)
+      .jpeg()
+      .toBuffer(function (err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(true, data.length > 0);
+        assert.strictEqual('jpeg', info.format);
+        assert.strictEqual(1024, info.width);
+        assert.strictEqual(512, info.height);
+        done();
+      });
+  });
+
+  it('Load rad from buffer', function (done) {
+    const buffer = fs.readFileSync(fixtures.inputHdr);
+    sharp(buffer)
+      .jpeg()
+      .toBuffer(function (err, data, info) {
+        if (err) throw err;
+        assert.strictEqual(true, data.length > 0);
+        assert.strictEqual('jpeg', info.format);
+        assert.strictEqual(1024, info.width);
+        assert.strictEqual(512, info.height);
+        done();
+      });
+  });
+});