fix: NativeImage.getScaleFactors returns correct scales (#25903)

shell/common/api/electron_api_native_image.cc

@@ -267,7 +267,11 @@ gfx::Size NativeImage::GetSize(const base::Optional<float> scale_factor) {
 
 std::vector<float> NativeImage::GetScaleFactors() {
   gfx::ImageSkia image_skia = image_.AsImageSkia();
-  return image_skia.GetSupportedScales();
+  std::vector<float> scale_factors;
+  for (const auto& rep : image_skia.image_reps()) {
+    scale_factors.push_back(rep.scale());
+  }
+  return scale_factors;
 }
 
 float NativeImage::GetAspectRatio(const base::Optional<float> scale_factor) {
@@ -386,18 +390,20 @@ gin::Handle<NativeImage> NativeImage::Create(v8::Isolate* isolate,
 gin::Handle<NativeImage> NativeImage::CreateFromPNG(v8::Isolate* isolate,
                                                     const char* buffer,
                                                     size_t length) {
-  gfx::Image image = gfx::Image::CreateFrom1xPNGBytes(
-      reinterpret_cast<const unsigned char*>(buffer), length);
-  return Create(isolate, image);
+  gfx::ImageSkia image_skia;
+  electron::util::AddImageSkiaRepFromPNG(
+      &image_skia, reinterpret_cast<const unsigned char*>(buffer), length, 1.0);
+  return Create(isolate, gfx::Image(image_skia));
 }
 
 // static
 gin::Handle<NativeImage> NativeImage::CreateFromJPEG(v8::Isolate* isolate,
                                                      const char* buffer,
                                                      size_t length) {
-  gfx::Image image = gfx::ImageFrom1xJPEGEncodedData(
-      reinterpret_cast<const unsigned char*>(buffer), length);
-  return Create(isolate, image);
+  gfx::ImageSkia image_skia;
+  electron::util::AddImageSkiaRepFromJPEG(
+      &image_skia, reinterpret_cast<const unsigned char*>(buffer), length, 1.0);
+  return Create(isolate, gfx::Image(image_skia));
 }
 
 // static

spec-main/api-remote-spec.ts

@@ -107,7 +107,7 @@ describe('typeUtils serialization/deserialization', () => {
     expect(nonEmpty.isEmpty()).to.be.false();
     expect(nonEmpty.getAspectRatio()).to.equal(1);
     expect(nonEmpty.toDataURL()).to.not.be.empty();
-    expect(nonEmpty.toDataURL({ scaleFactor: 1.0 })).to.equal(dataURL);
+    expect(nonEmpty.toBitmap({ scaleFactor: 1.0 })).to.deep.equal(image.toBitmap({ scaleFactor: 1.0 }));
     expect(nonEmpty.getSize()).to.deep.equal({ width: 2, height: 2 });
     expect(nonEmpty.getBitmap()).to.not.be.empty();
     expect(nonEmpty.toPNG()).to.not.be.empty();
@@ -132,14 +132,12 @@ describe('typeUtils serialization/deserialization', () => {
     expect(nonEmpty.getBitmap({ scaleFactor: 1.0 })).to.not.be.empty();
     expect(nonEmpty.getBitmap({ scaleFactor: 2.0 })).to.not.be.empty();
     expect(nonEmpty.toBitmap()).to.not.be.empty();
-    expect(nonEmpty.toBitmap({ scaleFactor: 1.0 })).to.not.be.empty();
-    expect(nonEmpty.toBitmap({ scaleFactor: 2.0 })).to.not.be.empty();
+    expect(nonEmpty.toBitmap({ scaleFactor: 1.0 })).to.deep.equal(image.toBitmap({ scaleFactor: 1.0 }));
+    expect(nonEmpty.toBitmap({ scaleFactor: 2.0 })).to.deep.equal(image.toBitmap({ scaleFactor: 2.0 }));
     expect(nonEmpty.toPNG()).to.not.be.empty();
     expect(nonEmpty.toPNG({ scaleFactor: 1.0 })).to.not.be.empty();
     expect(nonEmpty.toPNG({ scaleFactor: 2.0 })).to.not.be.empty();
     expect(nonEmpty.toDataURL()).to.not.be.empty();
-    expect(nonEmpty.toDataURL({ scaleFactor: 1.0 })).to.equal(dataURL1);
-    expect(nonEmpty.toDataURL({ scaleFactor: 2.0 })).to.equal(dataURL2);
   });
 
   it('serializes and deserializes an Array', () => {

spec/api-native-image-spec.js

@@ -539,23 +539,32 @@ describe('nativeImage module', () => {
         buffer: nativeImage.createFromPath(imageDataOne.path).toPNG()
       });
 
+      expect(image.getScaleFactors()).to.deep.equal([1]);
+
       const imageDataTwo = getImage({ width: 2, height: 2 });
       image.addRepresentation({
         scaleFactor: 2.0,
         buffer: nativeImage.createFromPath(imageDataTwo.path).toPNG()
       });
 
+      expect(image.getScaleFactors()).to.deep.equal([1, 2]);
+
       const imageDataThree = getImage({ width: 3, height: 3 });
       image.addRepresentation({
         scaleFactor: 3.0,
         buffer: nativeImage.createFromPath(imageDataThree.path).toPNG()
       });
 
+      expect(image.getScaleFactors()).to.deep.equal([1, 2, 3]);
+
       image.addRepresentation({
         scaleFactor: 4.0,
         buffer: 'invalid'
       });
 
+      // this one failed, so it shouldn't show up in the scale factors
+      expect(image.getScaleFactors()).to.deep.equal([1, 2, 3]);
+
       expect(image.isEmpty()).to.be.false();
       expect(image.getSize()).to.deep.equal({ width: 1, height: 1 });