Merge branch 'master' into master

.travis.yml

@@ -4,11 +4,10 @@ dist: trusty
 sudo: false
 
 go:
-  - "1.6"
-  - "1.7"
   - "1.8"
   - "1.9"
   - "1.10"
+  - "1.11"
   - "tip"
 
 env:
@@ -18,6 +17,7 @@ env:
   - LIBVIPS=8.4.6
   - LIBVIPS=8.5.8
   - LIBVIPS=8.6.2
+  - LIBVIPS=8.8.0
   - LIBVIPS=master
 
 matrix:
@@ -89,7 +89,7 @@ before_install:
   - vips --vips-version
 
 install:
-  - go get -u github.com/golang/lint/golint
+  - go get -u golang.org/x/lint/golint
 
 script:
   - diff -u <(echo -n) <(gofmt -s -d ./)

README.md

@@ -6,7 +6,7 @@ bimg was designed to be a small and efficient library supporting a common set of
 
 bimg is able to output images as JPEG, PNG and WEBP formats, including transparent conversion across them.
 
-bimg uses internally libvips, a powerful library written in C for image processing which requires a [low memory footprint](http://www.vips.ecs.soton.ac.uk/index.php?title=Speed_and_Memory_Use)
+bimg uses internally libvips, a powerful library written in C for image processing which requires a [low memory footprint](https://github.com/jcupitt/libvips/wiki/Speed_and_Memory_Use)
 and it's typically 4x faster than using the quickest ImageMagick and GraphicsMagick settings or Go native `image` package, and in some cases it's even 8x faster processing JPEG images.
 
 If you're looking for an HTTP based image processing solution, see [imaginary](https://github.com/h2non/imaginary).
@@ -77,10 +77,10 @@ The [install script](https://github.com/h2non/bimg/blob/master/preinstall.sh) re
 
 ## Performance
 
-libvips is probably the faster open source solution for image processing.
+libvips is probably the fastest open source solution for image processing.
 Here you can see some performance test comparisons for multiple scenarios:
 
-- [libvips speed and memory usage](http://www.vips.ecs.soton.ac.uk/index.php?title=Speed_and_Memory_Use)
+- [libvips speed and memory usage](https://github.com/jcupitt/libvips/wiki/Speed-and-memory-use)
 
 ## Benchmark
 

image.go

@@ -203,7 +203,7 @@ func (i *Image) Metadata() (ImageMetadata, error) {
 }
 
 // Interpretation gets the image interpretation type.
-// See: http://www.vips.ecs.soton.ac.uk/supported/current/doc/html/libvips/VipsImage.html#VipsInterpretation
+// See: https://jcupitt.github.io/libvips/API/current/VipsImage.html#VipsInterpretation
 func (i *Image) Interpretation() (Interpretation, error) {
 	return ImageInterpretation(i.buffer)
 }

metadata.go

@@ -43,7 +43,7 @@ func ColourspaceIsSupported(buf []byte) (bool, error) {
 }
 
 // ImageInterpretation returns the image interpretation type.
-// See: http://www.vips.ecs.soton.ac.uk/supported/current/doc/html/libvips/VipsImage.html#VipsInterpretation
+// See: https://jcupitt.github.io/libvips/API/current/VipsImage.html#VipsInterpretation
 func ImageInterpretation(buf []byte) (Interpretation, error) {
 	return vipsInterpretationBuffer(buf)
 }

options.go

@@ -89,7 +89,7 @@ const (
 )
 
 // Interpretation represents the image interpretation type.
-// See: http://www.vips.ecs.soton.ac.uk/supported/current/doc/html/libvips/VipsImage.html#VipsInterpretation
+// See: https://jcupitt.github.io/libvips/API/current/VipsImage.html#VipsInterpretation
 type Interpretation int
 
 const (
@@ -119,7 +119,7 @@ const (
 
 // Extend represents the image extend mode, used when the edges
 // of an image are extended, you can specify how you want the extension done.
-// See: http://www.vips.ecs.soton.ac.uk/supported/8.4/doc/html/libvips/libvips-conversion.html#VIPS-EXTEND-BACKGROUND:CAPS
+// See: https://jcupitt.github.io/libvips/API/current/libvips-conversion.html#VIPS-EXTEND-BACKGROUND:CAPS
 type Extend int
 
 const (

preinstall.sh

@@ -1,15 +1,15 @@
 #!/bin/bash
 
-vips_version_minimum=8.4.2
-vips_version_latest_major_minor=8.5
-vips_version_latest_patch=1
+vips_version_minimum=8.7.2
+vips_version_latest_major_minor=8.7
+vips_version_latest_patch=2
 vips_version_full="$vips_version_latest_major_minor.$vips_version_latest_patch"
 
 openslide_version_minimum=3.4.0
 openslide_version_latest_major_minor=3.4
 openslide_version_latest_patch=1
 
-tarbal_url="https://github.com/jcupitt/libvips/releases/download/v$vips_version_full/vips-$vips_version_full.tar.gz"
+tarbal_url="https://github.com/libvips/libvips/releases/download/v$vips_version_full/vips-$vips_version_full.tar.gz"
 
 install_libvips_from_source() {
   # Download tarball
@@ -125,8 +125,8 @@ if [ $enable_openslide -eq 1 ] && [ -z $vips_with_openslide ] && [ $openslide_ex
     DISTRO=$(lsb_release -c -s)
     echo "Detected Debian Linux '$DISTRO'"
     case "$DISTRO" in
-      jessie|vivid|wily|xenial)
-        # Debian 8, Ubuntu 15
+      jessie|vivid|wily|xenial|stretch)
+        # Debian 9, Debian 8, Ubuntu 15
         echo "Installing libopenslide via apt-get"
         apt-get install -y libopenslide-dev
         ;;
@@ -156,7 +156,7 @@ if [ $enable_openslide -eq 1 ] && [ -z $vips_with_openslide ] && [ $openslide_ex
         # RHEL/CentOS 7
         echo "Installing libopenslide dependencies via yum"
         yum groupinstall -y "Development Tools"
-        yum install -y tar curl libpng-devel libjpeg-devel libxml2-devel zlib-devel openjpeg-devel libtiff-devel gdk-pixbuf2-devel sqlite-devel cairo-devel glib2-devel
+        yum install -y tar curl libpng-devel libjpeg-devel libxml2-devel zlib-devel openjpeg-devel libtiff-devel gdk-pixbuf2-devel sqlite-devel cairo-devel glib2-devel expat-devel
         install_libopenslide_from_source "--prefix=/usr"
         ;;
       "Red Hat Enterprise Linux release 6."*|"CentOS release 6."*|"Scientific Linux release 6."*)
@@ -215,6 +215,12 @@ if [ -f /etc/debian_version ]; then
       apt-get install -y automake build-essential gobject-introspection gtk-doc-tools libglib2.0-dev libjpeg-dev libpng12-dev libwebp-dev libtiff5-dev libexif-dev libgsf-1-dev liblcms2-dev libxml2-dev swig libmagickcore-dev curl
       install_libvips_from_source
       ;;
+    stretch)
+      # Debian 9
+      echo "Installing libvips dependencies via apt-get"
+      apt-get install -y automake build-essential gobject-introspection gtk-doc-tools libglib2.0-dev libjpeg-dev libpng-dev libwebp-dev libtiff5-dev libexif-dev libgsf-1-dev liblcms2-dev libxml2-dev swig libmagickcore-dev curl
+      install_libvips_from_source
+      ;;
     precise|wheezy|maya)
       # Debian 7, Ubuntu 12.04, Mint 13
       echo "Installing libvips dependencies via apt-get"

resizer.go

@@ -12,6 +12,10 @@ import (
 	"math"
 )
 
+var (
+	ErrExtractAreaParamsRequired = errors.New("extract area width/height params are required")
+)
+
 // resizer is used to transform a given image as byte buffer
 // with the passed options.
 func resizer(buf []byte, o Options) ([]byte, error) {
@@ -274,7 +278,7 @@ func extractOrEmbedImage(image *C.VipsImage, o Options) (*C.VipsImage, error) {
 		break
 	case o.Top != 0 || o.Left != 0 || o.AreaWidth != 0 || o.AreaHeight != 0:
 		if o.AreaWidth == 0 {
-			o.AreaHeight = o.Width
+			o.AreaWidth = o.Width
 		}
 		if o.AreaHeight == 0 {
 			o.AreaHeight = o.Height
@@ -444,7 +448,11 @@ func imageCalculations(o *Options, inWidth, inHeight int) float64 {
 	switch {
 	// Fixed width and height
 	case o.Width > 0 && o.Height > 0:
-		factor = math.Min(xfactor, yfactor)
+		if o.Crop {
+			factor = math.Min(xfactor, yfactor)
+		} else {
+			factor = math.Max(xfactor, yfactor)
+		}
 	// Fixed width, auto height
 	case o.Width > 0:
 		if o.Crop {

resizer_test.go

@@ -364,6 +364,54 @@ func TestExtractCustomAxis(t *testing.T) {
 	Write("testdata/test_extract_custom_axis_out.jpg", newImg)
 }
 
+func TestExtractOrEmbedImage(t *testing.T) {
+	buf, _ := Read("testdata/test.jpg")
+	input, _, err := loadImage(buf)
+	if err != nil {
+		t.Fatalf("Unable to load image %s", err)
+	}
+
+	o := Options{
+		Top:    10,
+		Left:   10,
+		Width:  100,
+		Height: 200,
+
+		// Fields to test
+		AreaHeight: 0,
+		AreaWidth:  0,
+
+		Quality: 100, /* Needs a value to satisfy libvips */
+	}
+
+	result, err := extractOrEmbedImage(input, o)
+	if err != nil {
+		if err == ErrExtractAreaParamsRequired {
+			t.Fatalf("Expecting AreaWidth and AreaHeight to have been defined")
+		}
+
+		t.Fatalf("Unknown error occurred %s", err)
+	}
+
+	image, err := saveImage(result, o)
+	if err != nil {
+		t.Fatalf("Failed saving image %s", err)
+	}
+
+	test, err := Size(image)
+	if err != nil {
+		t.Fatalf("Failed fetching the size %s", err)
+	}
+
+	if test.Height != o.Height {
+		t.Errorf("Extract failed, resulting Height %d doesn't match %d", test.Height, o.Height)
+	}
+
+	if test.Width != o.Width {
+		t.Errorf("Extract failed, resulting Width %d doesn't match %d", test.Width, o.Width)
+	}
+}
+
 func TestConvert(t *testing.T) {
 	width, height := 300, 240
 	formats := [3]ImageType{PNG, WEBP, JPEG}

vips.go

@@ -605,7 +605,7 @@ func vipsReduce(input *C.VipsImage, xshrink float64, yshrink float64) (*C.VipsIm
 func vipsEmbed(input *C.VipsImage, left, top, width, height int, extend Extend, background Color) (*C.VipsImage, error) {
 	var image *C.VipsImage
 
-	// Max extend value, see: http://www.vips.ecs.soton.ac.uk/supported/8.4/doc/html/libvips/libvips-conversion.html#VipsExtend
+	// Max extend value, see: https://jcupitt.github.io/libvips/API/current/libvips-conversion.html#VipsExtend
 	if extend > 5 {
 		extend = ExtendBackground
 	}