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Resize images with preserve aspect ratio

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This commit is contained in:
Kevin Sawicki 2016-10-05 09:15:06 -07:00
parent 56f9cc683a
commit abffd98e29
4 changed files with 35 additions and 6 deletions
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26
atom/common/api/atom_api_native_image.cc
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@ -284,15 +284,32 @@ gfx::Size NativeImage::GetSize() {
return image_.Size();
}
float NativeImage::GetAspectRatio() {
gfx::Size size = GetSize();
if (size.IsEmpty())
return 1.f;
else
return static_cast<float>(size.width()) / static_cast<float>(size.height());
}
mate::Handle<NativeImage> NativeImage::Resize(
v8::Isolate* isolate, const base::DictionaryValue& options) {
gfx::Size size = GetSize();
int width = size.width();
int height = size.height();
options.GetInteger("width", &width);
options.GetInteger("height", &height);
size.set_width(width);
size.set_height(height);
bool width_set = options.GetInteger("width", &width);
bool height_set = options.GetInteger("height", &height);
size.SetSize(width, height);
if (width_set && !height_set) {
// Scale height to preserve original aspect ratio
size.set_height(width);
size = gfx::ScaleToRoundedSize(size, 1.f, 1.f / GetAspectRatio());
} else if (height_set && !width_set) {
// Scale width to preserve original aspect ratio
size.set_width(height);
size = gfx::ScaleToRoundedSize(size, GetAspectRatio(), 1.f);
}
skia::ImageOperations::ResizeMethod method =
skia::ImageOperations::ResizeMethod::RESIZE_BEST;
@ -420,6 +437,7 @@ void NativeImage::BuildPrototype(
.SetMethod("isTemplateImage", &NativeImage::IsTemplateImage)
.SetMethod("resize", &NativeImage::Resize)
.SetMethod("crop", &NativeImage::Crop)
.SetMethod("getAspectRatio", &NativeImage::GetAspectRatio)
// TODO(kevinsawicki): Remove in 2.0, deprecate before then with warnings
.SetMethod("toPng", &NativeImage::ToPNG)
.SetMethod("toJpeg", &NativeImage::ToJPEG);