From c98314bc4d1ec5a1e1df3a43128ad382de3091e7 Mon Sep 17 00:00:00 2001
From: Victor Kareh <vkareh@redhat.com>
Date: Mon, 8 Jul 2019 17:14:12 -0400
Subject: Allow color correcting images with alpha channel

This is mostly useful for PNG images for now but could also help
with TIFF files in the future. LittleCMS will still ignore the
alpha channel, so this should be harmless.

https://bugzilla.gnome.org/show_bug.cgi?id=725357

upstream commit:
https://gitlab.gnome.org/GNOME/eog/commit/80b536bc
---
 src/eom-image.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/src/eom-image.c b/src/eom-image.c
index 8e52832..b4bf960 100644
--- a/src/eom-image.c
+++ b/src/eom-image.c
@@ -667,18 +667,17 @@ eom_image_apply_display_profile (EomImage *img, cmsHPROFILE screen)
 		return;
 	}
 
-	/* TODO: find the right way to colorcorrect RGBA images */
-	if (gdk_pixbuf_get_has_alpha (priv->image)) {
-		eom_debug_message (DEBUG_LCMS, "Colorcorrecting RGBA images is unsupported.");
-		return;
-	}
+	cmsUInt32Number color_type = TYPE_RGB_8;
+
+	if (gdk_pixbuf_get_has_alpha (priv->image))
+		color_type = TYPE_RGBA_8;
 
 	transform = cmsCreateTransform (priv->profile,
-				        TYPE_RGB_8,
-				        screen,
-				        TYPE_RGB_8,
-				        INTENT_PERCEPTUAL,
-				        0);
+	                                color_type,
+	                                screen,
+	                                color_type,
+	                                INTENT_PERCEPTUAL,
+	                                0);
 
 	if (G_LIKELY (transform != NULL)) {
 		rows = gdk_pixbuf_get_height (priv->image);
-- 
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