1 files changed, 0 insertions, 83 deletions

diff --git a/thirdparty/libpng/pngread.c b/thirdparty/libpng/pngread.c
index fa44d5a8e4..5ab9224038 100644
--- a/thirdparty/libpng/pngread.c
+++ b/thirdparty/libpng/pngread.c
@@ -161,9 +161,6 @@ png_read_info(png_structrp png_ptr, png_inforp info_ptr)
 
       else if (chunk_name == png_IDAT)
       {
-#ifdef PNG_READ_APNG_SUPPORTED
-         png_have_info(png_ptr, info_ptr);
-#endif
          png_ptr->idat_size = length;
          break;
       }
@@ -258,17 +255,6 @@ png_read_info(png_structrp png_ptr, png_inforp info_ptr)
          png_handle_iTXt(png_ptr, info_ptr, length);
 #endif
 
-#ifdef PNG_READ_APNG_SUPPORTED
-      else if (chunk_name == png_acTL)
-         png_handle_acTL(png_ptr, info_ptr, length);
-
-      else if (chunk_name == png_fcTL)
-         png_handle_fcTL(png_ptr, info_ptr, length);
-
-      else if (chunk_name == png_fdAT)
-         png_handle_fdAT(png_ptr, info_ptr, length);
-#endif
-
       else
          png_handle_unknown(png_ptr, info_ptr, length,
              PNG_HANDLE_CHUNK_AS_DEFAULT);
@@ -276,72 +262,6 @@ png_read_info(png_structrp png_ptr, png_inforp info_ptr)
 }
 #endif /* SEQUENTIAL_READ */
 
-#ifdef PNG_READ_APNG_SUPPORTED
-void PNGAPI
-png_read_frame_head(png_structp png_ptr, png_infop info_ptr)
-{
-    png_byte have_chunk_after_DAT; /* after IDAT or after fdAT */
-
-    png_debug(0, "Reading frame head");
-
-    if (!(png_ptr->mode & PNG_HAVE_acTL))
-        png_error(png_ptr, "attempt to png_read_frame_head() but "
-                           "no acTL present");
-
-    /* do nothing for the main IDAT */
-    if (png_ptr->num_frames_read == 0)
-        return;
-
-    png_read_reset(png_ptr);
-    png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
-    png_ptr->mode &= ~PNG_HAVE_fcTL;
-
-    have_chunk_after_DAT = 0;
-    for (;;)
-    {
-        png_uint_32 length = png_read_chunk_header(png_ptr);
-
-        if (png_ptr->chunk_name == png_IDAT)
-        {
-            /* discard trailing IDATs for the first frame */
-            if (have_chunk_after_DAT || png_ptr->num_frames_read > 1)
-                png_error(png_ptr, "png_read_frame_head(): out of place IDAT");
-            png_crc_finish(png_ptr, length);
-        }
-
-        else if (png_ptr->chunk_name == png_fcTL)
-        {
-            png_handle_fcTL(png_ptr, info_ptr, length);
-            have_chunk_after_DAT = 1;
-        }
-
-        else if (png_ptr->chunk_name == png_fdAT)
-        {
-            png_ensure_sequence_number(png_ptr, length);
-
-            /* discard trailing fdATs for frames other than the first */
-            if (!have_chunk_after_DAT && png_ptr->num_frames_read > 1)
-                png_crc_finish(png_ptr, length - 4);
-            else if(png_ptr->mode & PNG_HAVE_fcTL)
-            {
-                png_ptr->idat_size = length - 4;
-                png_ptr->mode |= PNG_HAVE_IDAT;
-
-                break;
-            }
-            else
-                png_error(png_ptr, "png_read_frame_head(): out of place fdAT");
-        }
-        else
-        {
-            png_warning(png_ptr, "Skipped (ignored) a chunk "
-                                 "between APNG chunks");
-            png_crc_finish(png_ptr, length);
-        }
-    }
-}
-#endif /* PNG_READ_APNG_SUPPORTED */
-
 /* Optional call to update the users info_ptr structure */
 void PNGAPI
 png_read_update_info(png_structrp png_ptr, png_inforp info_ptr)
@@ -3532,7 +3452,6 @@ png_image_read_background(png_voidp argument)
 
             for (pass = 0; pass < passes; ++pass)
             {
-               png_bytep row = png_voidcast(png_bytep, display->first_row);
                unsigned int     startx, stepx, stepy;
                png_uint_32      y;
 
@@ -3637,8 +3556,6 @@ png_image_read_background(png_voidp argument)
 
                         inrow += 2; /* gray and alpha channel */
                      }
-
-                     row += display->row_bytes;
                   }
                }
             }