Cleanup: pass header size to 'is_a' callbacks

No functional changes, prepare for fixing out-of-bounds access
when reading headers.

2 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/imbuf/intern/openexr/openexr_api.cpp b/source/blender/imbuf/intern/openexr/openexr_api.cpp
index 6d4cff4d18d..467454ddb7a 100644
--- a/source/blender/imbuf/intern/openexr/openexr_api.cpp
+++ b/source/blender/imbuf/intern/openexr/openexr_api.cpp
@@ -330,7 +330,7 @@ extern "C" {
  * Test presence of OpenEXR file.
  * \param mem: pointer to loaded OpenEXR bitstream
  */
-int imb_is_a_openexr(const unsigned char *mem)
+bool imb_is_a_openexr(const unsigned char *mem, const size_t UNUSED(size))
 {
   return Imf::isImfMagic((const char *)mem);
 }
@@ -1905,7 +1905,7 @@ struct ImBuf *imb_load_openexr(const unsigned char *mem,
   IMemStream *membuf = nullptr;
   MultiPartInputFile *file = nullptr;
 
-  if (imb_is_a_openexr(mem) == 0) {
+  if (imb_is_a_openexr(mem, size) == 0) {
     return nullptr;
   }
 
diff --git a/source/blender/imbuf/intern/openexr/openexr_api.h b/source/blender/imbuf/intern/openexr/openexr_api.h
index fcbd9b803b8..940715690a7 100644
--- a/source/blender/imbuf/intern/openexr/openexr_api.h
+++ b/source/blender/imbuf/intern/openexr/openexr_api.h
@@ -32,7 +32,7 @@ extern "C" {
 void imb_initopenexr(void);
 void imb_exitopenexr(void);
 
-int imb_is_a_openexr(const unsigned char *mem);
+bool imb_is_a_openexr(const unsigned char *mem, const size_t size);
 
 bool imb_save_openexr(struct ImBuf *ibuf, const char *name, int flags);