1 files changed, 49 insertions, 0 deletions
diff --git a/source/blender/draw/engines/image/image_usage.hh b/source/blender/draw/engines/image/image_usage.hh
new file mode 100644
index 00000000000..bea5c3853b0
--- /dev/null
+++ b/source/blender/draw/engines/image/image_usage.hh
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2022 Blender Foundation. */
+
+/** \file
+ * \ingroup draw_engine
+ */
+
+#pragma once
+
+/**
+ * ImageUsage contains data of the image and image user to identify changes that require a rebuild
+ * the texture slots.
+ */
+struct ImageUsage {
+  /** Render pass of the image that is used. */
+  short pass = 0;
+  /** Layer of the image that is used.*/
+  short layer = 0;
+  /** View of the image that is used. */
+  short view = 0;
+
+  ColorManagedColorspaceSettings colorspace_settings;
+  /** IMA_ALPHA_* */
+  char alpha_mode;
+  bool last_tile_drawing;
+
+  const void *last_image = nullptr;
+
+  ImageUsage() = default;
+  ImageUsage(const struct Image *image, const struct ImageUser *image_user, bool do_tile_drawing)
+  {
+    pass = image_user ? image_user->pass : 0;
+    layer = image_user ? image_user->layer : 0;
+    view = image_user ? image_user->multi_index : 0;
+    colorspace_settings = image->colorspace_settings;
+    alpha_mode = image->alpha_mode;
+    last_image = static_cast<const void *>(image);
+    last_tile_drawing = do_tile_drawing;
+  }
+
+  bool operator==(const ImageUsage &other) const
+  {
+    return memcmp(this, &other, sizeof(ImageUsage)) == 0;
+  }
+  bool operator!=(const ImageUsage &other) const
+  {
+    return !(*this == other);
+  }
+};