From 03a29090b57d087b7996dd25e1505537221233f9 Mon Sep 17 00:00:00 2001
From: Yevgeny Makarov <jenkm>
Date: Mon, 3 Feb 2020 17:47:04 +0100
Subject: UI: invert toolbar icon colors for light toolbar button background

Fixes T64177.

Differential Revision: https://developer.blender.org/D6649
---
 source/blender/blenkernel/BKE_icons.h              |  5 +++--
 source/blender/blenkernel/intern/icons.c           |  4 ++--
 source/blender/blenkernel/intern/icons_rasterize.c | 14 ++++++++++++++
 3 files changed, 19 insertions(+), 4 deletions(-)

(limited to 'source/blender/blenkernel')

diff --git a/source/blender/blenkernel/BKE_icons.h b/source/blender/blenkernel/BKE_icons.h
index 417591e03c5..27d7f45e480 100644
--- a/source/blender/blenkernel/BKE_icons.h
+++ b/source/blender/blenkernel/BKE_icons.h
@@ -62,8 +62,8 @@ struct Icon_Geom {
   int icon_id;
   int coords_len;
   int coords_range[2];
-  const unsigned char (*coords)[2];
-  const unsigned char (*colors)[4];
+  unsigned char (*coords)[2];
+  unsigned char (*colors)[4];
   /* when not NULL, the memory of coords and colors is a sub-region of this pointer. */
   const void *mem;
 };
@@ -160,6 +160,7 @@ struct Icon_Geom *BKE_icon_geom_from_file(const char *filename);
 struct ImBuf *BKE_icon_geom_rasterize(const struct Icon_Geom *geom,
                                       const unsigned int size_x,
                                       const unsigned int size_y);
+void BKE_icon_geom_invert_lightness(struct Icon_Geom *geom);
 
 int BKE_icon_ensure_studio_light(struct StudioLight *sl, int id_type);
 
diff --git a/source/blender/blenkernel/intern/icons.c b/source/blender/blenkernel/intern/icons.c
index 7b8a0a8894f..6363a23de6c 100644
--- a/source/blender/blenkernel/intern/icons.c
+++ b/source/blender/blenkernel/intern/icons.c
@@ -842,8 +842,8 @@ struct Icon_Geom *BKE_icon_geom_from_memory(const uchar *data, size_t data_len)
   p += 2;
 
   geom->coords_len = coords_len;
-  geom->coords = (const void *)p;
-  geom->colors = (const void *)(p + (data_len / 3));
+  geom->coords = (void *)p;
+  geom->colors = (void *)(p + (data_len / 3));
   geom->icon_id = 0;
   geom->mem = data;
   return geom;
diff --git a/source/blender/blenkernel/intern/icons_rasterize.c b/source/blender/blenkernel/intern/icons_rasterize.c
index e87180ce732..f731285e029 100644
--- a/source/blender/blenkernel/intern/icons_rasterize.c
+++ b/source/blender/blenkernel/intern/icons_rasterize.c
@@ -139,3 +139,17 @@ ImBuf *BKE_icon_geom_rasterize(const struct Icon_Geom *geom,
   IMB_scaleImBuf(ibuf, size_x, size_y);
   return ibuf;
 }
+
+void BKE_icon_geom_invert_lightness(struct Icon_Geom *geom)
+{
+  const int length = 3 * geom->coords_len;
+
+  for (int i = 0; i < length; i++) {
+    float rgb[3], hsl[3];
+
+    rgb_uchar_to_float(rgb, geom->colors[i]);
+    rgb_to_hsl_v(rgb, hsl);
+    hsl_to_rgb(hsl[0], hsl[1], 1.0f - hsl[2], &rgb[0], &rgb[1], &rgb[2]);
+    rgb_float_to_uchar(geom->colors[i], rgb);
+  }
+}
-- 
cgit v1.2.3