Workbench: StudioLight HDRI's

The Studio lights are now loaded from disk. The location is
`datafiles/studiolights` they need to be JPG for now. JPG cannot store
HDRI color range but they are clamped inside the Workbench
engine for speed reason. I didn't select JP2K as it might not be
enabled.

Users can add upto 20 HDRI files. This limitation is inside the
RNA_space.c Currently the icons are calculated when you first open the
selection box for the HDRI's. We could add them to a background
rendering later.

I added 2 test files a sky texture rendered in Cycles and an HDRI from
cloud.blender.org.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_icons.h b/source/blender/blenkernel/BKE_icons.h
index 766704b8f9c..e54531bdb0e 100644
--- a/source/blender/blenkernel/BKE_icons.h
+++ b/source/blender/blenkernel/BKE_icons.h
@@ -43,6 +43,7 @@ enum {
 	ICON_DATA_PREVIEW,
 	/** 2D triangles: obj is #Icon_Geom */
 	ICON_DATA_GEOM,
+	ICON_DATA_STUDIOLIGHT,
 };
 
 struct Icon {
@@ -77,6 +78,7 @@ typedef struct Icon Icon;
 struct ImBuf;
 struct PreviewImage;
 struct ID;
+struct StudioLight;
 
 enum eIconSizes;
 
@@ -158,6 +160,8 @@ struct ImBuf *BKE_icon_geom_rasterize(
         const struct Icon_Geom *geom,
         const unsigned int size_x, const unsigned int size_y);
 
+int BKE_icon_ensure_studio_light(struct StudioLight *sl);
+
 #define ICON_RENDER_DEFAULT_HEIGHT 32
 
 #endif /*  __BKE_ICONS_H__ */