fix(#33): bad auto rotatino

metadata_test.go

@@ -17,7 +17,6 @@ func TestSize(t *testing.T) {
 		{"test.png", 400, 300},
 		{"test.webp", 550, 368},
 	}
-
 	for _, file := range files {
 		size, err := Size(readFile(file.name))
 		if err != nil {

options.go

@@ -42,10 +42,10 @@ func (i Interpolator) String() string {
 type Angle int
 
 const (
-	D0   Angle = C.VIPS_ANGLE_D0
+	D0   Angle = 0
-	D90  Angle = C.VIPS_ANGLE_D90
+	D90  Angle = 90
-	D180 Angle = C.VIPS_ANGLE_D180
+	D180 Angle = 180
-	D270 Angle = C.VIPS_ANGLE_D270
+	D270 Angle = 270
 )
 
 type Direction int

resize.go

@@ -78,6 +78,18 @@ func Resize(buf []byte, o Options) ([]byte, error) {
 		residual = float64(shrink) / factor
 	}
 
+	// Zoom image if necessary
+	image, err = zoomImage(image, o.Zoom)
+	if err != nil {
+		return nil, err
+	}
+
+	// Rotate / flip image if necessary
+	image, err = rotateAndFlipImage(image, o)
+	if err != nil {
+		return nil, err
+	}
+
 	// Transform image if necessary
 	shouldTransform := o.Width != inWidth || o.Height != inHeight || o.AreaWidth > 0 || o.AreaHeight > 0
 	if shouldTransform {
@@ -106,18 +118,6 @@ func Resize(buf []byte, o Options) ([]byte, error) {
 		}
 	}
 
-	// Zoom image if necessary
-	image, err = zoomImage(image, o.Zoom)
-	if err != nil {
-		return nil, err
-	}
-
-	// Rotate / flip image if necessary
-	image, err = rotateImage(image, o)
-	if err != nil {
-		return nil, err
-	}
-
 	// Add watermark if necessary
 	image, err = watermakImage(image, o.Watermark)
 	if err != nil {
@@ -167,7 +167,7 @@ func extractImage(image *C.struct__VipsImage, o Options) (*C.struct__VipsImage,
 	return image, err
 }
 
-func rotateImage(image *C.struct__VipsImage, o Options) (*C.struct__VipsImage, error) {
+func rotateAndFlipImage(image *C.struct__VipsImage, o Options) (*C.struct__VipsImage, error) {
 	var err error
 	var direction Direction = -1
 
@@ -341,41 +341,35 @@ func calculateRotationAndFlip(image *C.struct__VipsImage, angle Angle) (Angle, b
 	rotate := D0
 	flip := false
 
-	if angle == -1 {
+	if angle > 0 {
-		switch vipsExifOrientation(image) {
+		return rotate, flip
-		case 6:
+	}
-			rotate = D90
+
-			break
+	switch vipsExifOrientation(image) {
-		case 3:
+	case 6:
-			rotate = D180
+		rotate = D90
-			break
+		break
-		case 8:
+	case 3:
-			rotate = D270
+		rotate = D180
-			break
+		break
-		case 2:
+	case 8:
-			flip = true
+		rotate = D270
-			break // flip 1
+		break
-		case 7:
+	case 2:
-			flip = true
+		flip = true
-			rotate = D90
+		break // flip 1
-			break // flip 6
+	case 7:
-		case 4:
+		flip = true
-			flip = true
+		rotate = D90
-			rotate = D180
+		break // flip 6
-			break // flip 3
+	case 4:
-		case 5:
+		flip = true
-			flip = true
+		rotate = D180
-			rotate = D270
+		break // flip 3
-			break // flip 8
+	case 5:
-		}
+		flip = true
-	} else {
+		rotate = D270
-		if angle == 90 {
+		break // flip 8
-			rotate = D90
-		} else if angle == 180 {
-			rotate = D180
-		} else if angle == 270 {
-			rotate = D270
-		}
 	}
 
 	return rotate, flip

vips.go

@@ -3,7 +3,6 @@ package bimg
 /*
 #cgo pkg-config: vips
 #include "vips.h"
-#include "stdlib.h"
 */
 import "C"
 
@@ -97,7 +96,7 @@ func Shutdown() {
 }
 
 // Output to stdout vips collected data. Useful for debugging
-func VipsDebug() {
+func VipsDebugInfo() {
 	C.im__print_all()
 }