UDIM: Add support for packing inside .blend files

This completes support for tiled texture packing on the Blender / Cycles
side of things.

Most of these changes fall into one of three categories:
- Updating Image handling code to pack/unpack tiled and multi-view images
- Updating Cycles to handle tiled textures through BlenderImageLoader
- Updating OSL to properly handle textures with multiple slots

Differential Revision: https://developer.blender.org/D14395

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_image_types.h b/source/blender/makesdna/DNA_image_types.h
index 4e66e2446f0..80f592bb66d 100644
--- a/source/blender/makesdna/DNA_image_types.h
+++ b/source/blender/makesdna/DNA_image_types.h
@@ -64,6 +64,11 @@ typedef struct ImageView {
 typedef struct ImagePackedFile {
   struct ImagePackedFile *next, *prev;
   struct PackedFile *packedfile;
+
+  /* Which view and tile this ImagePackedFile represents. Normal images will use 0 and 1001
+   * respectively when creating their ImagePackedFile. Must be provided for each packed image. */
+  int view;
+  int tile_number;
   /** 1024 = FILE_MAX. */
   char filepath[1024];
 } ImagePackedFile;