feat(#15): add benchmark tests

README.md

@@ -56,7 +56,19 @@ 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)
 - [sharp performance tests](https://github.com/lovell/sharp#the-task) 
 
-bimg performance tests coming soon!
+#### bimg performance tests
+
+Tested using Go 1.4 and libvips-7.42.3 in OSX i7 2.7Ghz
+```
+PASS
+BenchmarkResizeLargeJpeg  30    46652408 ns/op
+BenchmarkResizePng        20    57387902 ns/op
+BenchmarkResizeWebP       500    2453220 ns/op
+BenchmarkConvertToJpeg    30    35556414 ns/op
+BenchmarkCrop             30    51768475 ns/op
+BenchmarkExtract          30    50866406 ns/op
+ok 9.424s
+```
 
 ## API
 
@@ -193,6 +205,12 @@ func Resize(buf []byte, o Options) ([]byte, error)
 func Shutdown()
 ```
 
+#### func  Write
+
+```go
+func Write(path string, buf []byte) error
+```
+
 #### type Angle
 
 ```go
@@ -263,13 +281,13 @@ func (i *Image) Convert(t ImageType) ([]byte, error)
 #### func (*Image) Crop
 
 ```go
-func (i *Image) Crop(width int, height int) ([]byte, error)
+func (i *Image) Crop(width, height int) ([]byte, error)
 ```
 
 #### func (*Image) Extract
 
 ```go
-func (i *Image) Extract(top int, left int, width int, height int) ([]byte, error)
+func (i *Image) Extract(top, left, width, height int) ([]byte, error)
 ```
 
 #### func (*Image) Flip
@@ -278,12 +296,6 @@ func (i *Image) Extract(top int, left int, width int, height int) ([]byte, error
 func (i *Image) Flip() ([]byte, error)
 ```
 
-#### func (*Image) Flop
-
-```go
-func (i *Image) Flop() ([]byte, error)
-```
-
 #### func (*Image) Metadata
 
 ```go
@@ -299,7 +311,7 @@ func (i *Image) Process(o Options) ([]byte, error)
 #### func (*Image) Resize
 
 ```go
-func (i *Image) Resize(width int, height int) ([]byte, error)
+func (i *Image) Resize(width, height int) ([]byte, error)
 ```
 
 #### func (*Image) Rotate
@@ -314,6 +326,12 @@ func (i *Image) Rotate(a Angle) ([]byte, error)
 func (i *Image) Size() (ImageSize, error)
 ```
 
+#### func (*Image) Thumbnail
+
+```go
+func (i *Image) Thumbnail(pixels int) ([]byte, error)
+```
+
 #### func (*Image) Type
 
 ```go
@@ -325,10 +343,11 @@ func (i *Image) Type() string
 ```go
 type ImageMetadata struct {
   Orientation int
+  Channels    int
   Alpha       bool
   Profile     bool
-  Space       int
   Type        string
+  Space       string
   Size        ImageSize
 }
 ```
@@ -407,6 +426,8 @@ func (i Interpolator) String() string
 type Options struct {
   Height       int
   Width        int
+  AreaHeight   int
+  AreaWidth    int
   Top          int
   Left         int
   Crop         bool
@@ -423,6 +444,7 @@ type Options struct {
 }
 ```
 
+
 ## License
 
 MIT - Tomas Aparicio

metadata.go

@@ -21,6 +21,7 @@ type ImageMetadata struct {
 	Size        ImageSize
 }
 
+// Get the image size by width and height pixels
 func Size(buf []byte) (ImageSize, error) {
 	metadata, err := Metadata(buf)
 	if err != nil {
@@ -33,6 +34,7 @@ func Size(buf []byte) (ImageSize, error) {
 	}, nil
 }
 
+// Extract the image metadata (size, type, alpha channel, profile, EXIF orientation...)
 func Metadata(buf []byte) (ImageMetadata, error) {
 	defer C.vips_thread_shutdown()
 

resize_test.go

@@ -134,7 +134,7 @@ func TestResizePngWithTransparency(t *testing.T) {
 	}
 }
 
-func benchmarkResize(file string, o Options, b *testing.B) {
+func runBenchmarkResize(file string, o Options, b *testing.B) {
 	buf, _ := Read(path.Join("fixtures", file))
 
 	for n := 0; n < b.N; n++ {
@@ -147,7 +147,7 @@ func BenchmarkResizeLargeJpeg(b *testing.B) {
 		Width:  800,
 		Height: 600,
 	}
-	benchmarkResize("test.jpg", options, b)
+	runBenchmarkResize("test.jpg", options, b)
 }
 
 func BenchmarkResizePng(b *testing.B) {
@@ -155,7 +155,7 @@ func BenchmarkResizePng(b *testing.B) {
 		Width:  200,
 		Height: 200,
 	}
-	benchmarkResize("test.png", options, b)
+	runBenchmarkResize("test.png", options, b)
 }
 
 func BenchmarkResizeWebP(b *testing.B) {
@@ -163,5 +163,29 @@ func BenchmarkResizeWebP(b *testing.B) {
 		Width:  200,
 		Height: 200,
 	}
-	benchmarkResize("test.webp", options, b)
+	runBenchmarkResize("test.webp", options, b)
+}
+
+func BenchmarkConvertToJpeg(b *testing.B) {
+	options := Options{Type: JPEG}
+	runBenchmarkResize("test.png", options, b)
+}
+
+func BenchmarkCrop(b *testing.B) {
+	options := Options{
+		Width:  800,
+		Height: 600,
+		Crop:   true,
+	}
+	runBenchmarkResize("test.jpg", options, b)
+}
+
+func BenchmarkExtract(b *testing.B) {
+	options := Options{
+		Top:        100,
+		Left:       50,
+		AreaWidth:  600,
+		AreaHeight: 480,
+	}
+	runBenchmarkResize("test.jpg", options, b)
 }

type.go

@@ -11,14 +11,27 @@ const (
 	MAGICK
 )
 
+// Determines the image type format (jpeg, png, webp or tiff)
 func DetermineImageType(buf []byte) ImageType {
 	return vipsImageType(buf)
 }
 
+// Determines the image type format by name (jpeg, png, webp or tiff)
 func DetermineImageTypeName(buf []byte) string {
 	return getImageTypeName(vipsImageType(buf))
 }
 
+// Check if a given image type is supported
+func IsTypeSupported(t ImageType) bool {
+	return t == JPEG || t == PNG || t == WEBP
+}
+
+// Check if a given image type name is supported
+func IsTypeNameSupported(t string) bool {
+	return t == "jpeg" || t == "jpg" ||
+		t == "png" || t == "webp"
+}
+
 func getImageTypeName(code ImageType) string {
 	imageType := "unknown"
 
@@ -42,12 +55,3 @@ func getImageTypeName(code ImageType) string {
 
 	return imageType
 }
-
-func IsTypeSupported(t ImageType) bool {
-	return t == JPEG || t == PNG || t == WEBP
-}
-
-func IsTypeNameSupported(t string) bool {
-	return t == "jpeg" || t == "jpg" ||
-		t == "png" || t == "webp"
-}

vips.h

@@ -11,12 +11,6 @@ enum types {
 	MAGICK
 };
 
-void
-vips_malloc_cb(VipsObject *object, char *buf)
-{
-	g_free(buf);
-};
-
 int
 vips_affine_interpolator(VipsImage *in, VipsImage **out, double a, double b, double c, double d, VipsInterpolate *interpolator)
 {
@@ -157,10 +151,5 @@ vips_init_image(void *buf, size_t len, int imageType, VipsImage **out) {
 #endif
 	}
 
-	// Listen for "postclose" signal to delete input buffer
-	//if (out != NULL) {
-		//g_signal_connect(out, "postclose", G_CALLBACK(vips_malloc_cb), buf);
-	//}
-
 	return code;
 };