UI: Speedup preview icon loading from hard drive

Significantly improves loading speed of preview images from disk, e.g. custom
previews loaded using `bpy.utils.previews.ImagePreviewCollection.load()`.

See D14144 for details & comparison videos.

Differential Revision: https://developer.blender.org/D14144

Reviewed by: Bastien Montagne

1 files changed, 5 insertions, 7 deletions

diff --git a/source/blender/editors/include/ED_render.h b/source/blender/editors/include/ED_render.h
index e1b6a935d6d..ee40cc75e1e 100644
--- a/source/blender/editors/include/ED_render.h
+++ b/source/blender/editors/include/ED_render.h
@@ -24,6 +24,7 @@ struct Scene;
 struct ScrArea;
 struct bContext;
 struct bScreen;
+struct PreviewImage;
 struct wmWindow;
 struct wmWindowManager;
 
@@ -87,16 +88,13 @@ void ED_preview_shader_job(const struct bContext *C,
                            ePreviewRenderMethod method);
 void ED_preview_icon_render(const struct bContext *C,
                             struct Scene *scene,
+                            struct PreviewImage *prv_img,
                             struct ID *id,
-                            unsigned int *rect,
-                            int sizex,
-                            int sizey);
+                            enum eIconSizes icon_size);
 void ED_preview_icon_job(const struct bContext *C,
-                         void *owner,
+                         struct PreviewImage *prv_img,
                          struct ID *id,
-                         unsigned int *rect,
-                         int sizex,
-                         int sizey,
+                         enum eIconSizes icon_size,
                          bool delay);
 
 void ED_preview_restart_queue_free(void);