Cleanup: use IMB_FTYPE_NONE instead of 0 for imbuf format comparison

Image format code checked the file type against an enum except for
zero which is used when the format can't be detected.

Also add doc-strings to some of the image file type callbacks.

1 files changed, 5 insertions, 2 deletions

diff --git a/source/blender/imbuf/IMB_imbuf_types.h b/source/blender/imbuf/IMB_imbuf_types.h
index 98e9c34a4ff..4bb3ea500fa 100644
--- a/source/blender/imbuf/IMB_imbuf_types.h
+++ b/source/blender/imbuf/IMB_imbuf_types.h
@@ -69,7 +69,7 @@ typedef struct DDSData {
  * See T46524. */
 
 /** #ImBuf.ftype flag, main image types. */
-enum eImbTypes {
+enum eImbFileType {
   IMB_FTYPE_PNG = 1,
   IMB_FTYPE_TGA = 2,
   IMB_FTYPE_JPG = 3,
@@ -98,6 +98,9 @@ enum eImbTypes {
 #endif
 };
 
+/* Only for readability. */
+#define IMB_FTYPE_NONE 0
+
 /* ibuf->foptions flag, type specific options.
  * Some formats include compression rations on some bits */
 
@@ -243,7 +246,7 @@ typedef struct ImBuf {
 
   /* file information */
   /** file type we are going to save as */
-  enum eImbTypes ftype;
+  enum eImbFileType ftype;
   /** file format specific flags */
   ImbFormatOptions foptions;
   /** filename associated with this image */