From 840e7f172ce3b805dc5c3e4889e1166159942dc3 Mon Sep 17 00:00:00 2001
From: Přemysl Eric Janouch <p@janouch.name>
Date: Sun, 9 Jul 2023 09:46:31 +0200
Subject: Colour-manage SVGs

---
 fiv-io.c        | 12 ++++++------
 fiv-io.h        |  4 +++-
 fiv-thumbnail.c |  7 ++++++-
 fiv-view.c      |  3 ++-
 4 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/fiv-io.c b/fiv-io.c
index 6bbb128..83f9c25 100644
--- a/fiv-io.c
+++ b/fiv-io.c
@@ -2310,11 +2310,11 @@ load_resvg_render_internal(FivIoRenderClosureResvg *self,
 }
 
 static FivIoImage *
-load_resvg_render(FivIoRenderClosure *closure, double scale)
+load_resvg_render(
+	FivIoRenderClosure *closure, FivIoProfile target, double scale)
 {
 	FivIoRenderClosureResvg *self = (FivIoRenderClosureResvg *) closure;
-	// TODO(p): Somehow get the target colour management profile.
-	return load_resvg_render_internal(self, scale, NULL, NULL);
+	return load_resvg_render_internal(self, scale, target, NULL);
 }
 
 static const char *
@@ -2434,11 +2434,11 @@ load_librsvg_render_internal(FivIoRenderClosureLibrsvg *self, double scale,
 }
 
 static FivIoImage *
-load_librsvg_render(FivIoRenderClosure *closure, double scale)
+load_librsvg_render(
+	FivIoRenderClosure *closure, FivIoProfile target, double scale)
 {
 	FivIoRenderClosureLibrsvg *self = (FivIoRenderClosureLibrsvg *) closure;
-	// TODO(p): Somehow get the target colour management profile.
-	return load_librsvg_render_internal(self, scale, NULL, NULL);
+	return load_librsvg_render_internal(self, scale, target, NULL);
 }
 
 static FivIoImage *
diff --git a/fiv-io.h b/fiv-io.h
index 224aec0..ea9c6c4 100644
--- a/fiv-io.h
+++ b/fiv-io.h
@@ -56,9 +56,11 @@ enum _FivIoOrientation {
 	FivIoOrientation270       = 8
 };
 
+// TODO(p): Maybe make FivIoProfile a referencable type,
+// then loaders could store it in their closures.
 struct _FivIoRenderClosure {
 	/// The rendering is allowed to fail, returning NULL.
-	FivIoImage *(*render)(FivIoRenderClosure *, double scale);
+	FivIoImage *(*render)(FivIoRenderClosure *, FivIoProfile, double scale);
 	void (*destroy)(FivIoRenderClosure *);
 };
 
diff --git a/fiv-thumbnail.c b/fiv-thumbnail.c
index 267daf7..cc0858c 100644
--- a/fiv-thumbnail.c
+++ b/fiv-thumbnail.c
@@ -139,6 +139,7 @@ render(GFile *target, GBytes *data, gboolean *color_managed, GError **error)
 {
 	FivIoOpenContext ctx = {
 		.uri = g_file_get_uri(target),
+		// Remember to synchronize changes with adjust_thumbnail().
 		.screen_profile = fiv_io_profile_new_sRGB(),
 		.screen_dpi = 96,
 		.first_frame_only = TRUE,
@@ -180,8 +181,12 @@ adjust_thumbnail(FivIoImage *thumbnail, double row_height)
 	// Vector images should not have orientation, this should handle them all.
 	FivIoRenderClosure *closure = thumbnail->render;
 	if (closure && orientation <= FivIoOrientation0) {
+		// Remember to synchronize changes with render().
+		FivIoProfile screen_profile = fiv_io_profile_new_sRGB();
 		// This API doesn't accept non-uniform scaling; prefer a vertical fit.
-		FivIoImage *scaled = closure->render(closure, scale_y);
+		FivIoImage *scaled = closure->render(closure, screen_profile, scale_y);
+		if (screen_profile)
+			fiv_io_profile_free(screen_profile);
 		if (scaled)
 			return scaled;
 	}
diff --git a/fiv-view.c b/fiv-view.c
index bce7a4b..0b15e5e 100644
--- a/fiv-view.c
+++ b/fiv-view.c
@@ -409,7 +409,8 @@ prescale_page(FivView *self)
 
 	// If it fails, the previous frame pointer may become invalid.
 	g_clear_pointer(&self->page_scaled, fiv_io_image_unref);
-	self->frame = self->page_scaled = closure->render(closure, self->scale);
+	self->frame = self->page_scaled = closure->render(closure,
+		self->enable_cms ? self->screen_cms_profile : NULL, self->scale);
 	if (!self->page_scaled)
 		self->frame = self->page;
 }
-- 
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