From d883bb6fee66df895ebc7bf80ed6a4eb352ca1b9 Mon Sep 17 00:00:00 2001
From: Evan Oberholster <eroberholster@gmail.com>
Date: Sun, 4 Nov 2018 22:04:19 +0200
Subject: [PATCH] Update Transform ICC Profiles with Input Profile

Support for input profile when there is none embbeded in image.
---
 options.go |  1 +
 resizer.go |  1 +
 vips.go    | 35 ++++++++++++++++++++++++++++++++++-
 vips.h     |  9 ++++++++-
 4 files changed, 44 insertions(+), 2 deletions(-)

diff --git a/options.go b/options.go
index 17a1cb4..270a11c 100644
--- a/options.go
+++ b/options.go
@@ -223,4 +223,5 @@ type Options struct {
 	Sharpen        Sharpen
 	Threshold      float64
 	OutputICC      string
+	InputICC 	   string
 }
diff --git a/resizer.go b/resizer.go
index 98a95ae..b84b4d0 100644
--- a/resizer.go
+++ b/resizer.go
@@ -161,6 +161,7 @@ func saveImage(image *C.VipsImage, o Options) ([]byte, error) {
 		Interlace:      o.Interlace,
 		NoProfile:      o.NoProfile,
 		Interpretation: o.Interpretation,
+		InputICC:		o.InputICC,
 		OutputICC:      o.OutputICC,
 		StripMetadata:  o.StripMetadata,
 		Lossless:       o.Lossless,
diff --git a/vips.go b/vips.go
index fb17901..b9884d3 100644
--- a/vips.go
+++ b/vips.go
@@ -52,6 +52,7 @@ type vipsSaveOptions struct {
 	NoProfile      bool
 	StripMetadata  bool
 	Lossless       bool
+	InputICC 	   string // Absolute path to the input ICC profile
 	OutputICC      string // Absolute path to the output ICC profile
 	Interpretation Interpretation
 }
@@ -233,7 +234,7 @@ func vipsRotate(image *C.VipsImage, angle Angle) (*C.VipsImage, error) {
 	var out *C.VipsImage
 	defer C.g_object_unref(C.gpointer(image))
 
-	err := C.vips_rotate(image, &out, C.int(angle))
+	err := C.vips_rotate_bridge(image, &out, C.int(angle))
 	if err != 0 {
 		return nil, catchVipsError()
 	}
@@ -241,6 +242,23 @@ func vipsRotate(image *C.VipsImage, angle Angle) (*C.VipsImage, error) {
 	return out, nil
 }
 
+func vipsTransformICC(image *C.VipsImage, inputICC string, outputICC string) (*C.VipsImage, error) {
+	var out *C.VipsImage
+	defer C.g_object_unref(C.gpointer(image))
+
+	outputIccPath := C.CString(outputICC)
+	defer C.free(unsafe.Pointer(outputIccPath))
+	inputIccPath := C.CString(inputICC)
+	defer C.free(unsafe.Pointer(inputIccPath))
+	err := C.vips_icc_transform_with_default_bridge(image, &out, outputIccPath, inputIccPath)
+	//err := C.vips_icc_transform_bridge2(image, &outImage, outputIccPath, inputIccPath)
+	if int(err) != 0 {
+		return nil, catchVipsError()
+	}
+
+	return out, nil
+}
+
 func vipsFlip(image *C.VipsImage, direction Direction) (*C.VipsImage, error) {
 	var out *C.VipsImage
 	defer C.g_object_unref(C.gpointer(image))
@@ -381,6 +399,21 @@ func vipsPreSave(image *C.VipsImage, o *vipsSaveOptions) (*C.VipsImage, error) {
 		image = outImage
 	}
 
+	if o.OutputICC != "" && o.InputICC != "" {
+		outputIccPath := C.CString(o.OutputICC)
+		defer C.free(unsafe.Pointer(outputIccPath))
+
+		inputIccPath := C.CString(o.InputICC)
+		defer C.free(unsafe.Pointer(inputIccPath))
+
+		err := C.vips_icc_transform_with_default_bridge(image, &outImage, outputIccPath, inputIccPath)
+		if int(err) != 0 {
+			return nil, catchVipsError()
+		}
+		C.g_object_unref(C.gpointer(image))
+		return outImage, nil
+	}
+
 	if o.OutputICC != "" && vipsHasProfile(image) {
 		outputIccPath := C.CString(o.OutputICC)
 		defer C.free(unsafe.Pointer(outputIccPath))
diff --git a/vips.h b/vips.h
index 29a2e63..65e4331 100644
--- a/vips.h
+++ b/vips.h
@@ -177,7 +177,7 @@ vips_type_find_save_bridge(int t) {
 }
 
 int
-vips_rotate(VipsImage *in, VipsImage **out, int angle) {
+vips_rotate_bridge(VipsImage *in, VipsImage **out, int angle) {
 	int rotate = VIPS_ANGLE_D0;
 
 	angle %= 360;
@@ -274,6 +274,13 @@ vips_icc_transform_bridge (VipsImage *in, VipsImage **out, const char *output_ic
 	return vips_icc_transform(in, out, output_icc_profile, "embedded", TRUE, NULL);
 }
 
+
+int
+vips_icc_transform_with_default_bridge (VipsImage *in, VipsImage **out, const char *output_icc_profile, const char *input_icc_profile) {
+	// `output_icc_profile` represents the absolute path to the output ICC profile file
+	return vips_icc_transform(in, out, output_icc_profile, "input_profile", input_icc_profile, "embedded", FALSE, NULL);
+}
+
 int
 vips_jpegsave_bridge(VipsImage *in, void **buf, size_t *len, int strip, int quality, int interlace) {
 	return vips_jpegsave_buffer(in, buf, len,