1 files changed, 8 insertions, 151 deletions

diff --git a/thirdparty/libpng/pngset.c b/thirdparty/libpng/pngset.c
index a281db58ae..8c372cf415 100644
--- a/thirdparty/libpng/pngset.c
+++ b/thirdparty/libpng/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Copyright (c) 2018 Cosmin Truta
+ * Copyright (c) 2018-2022 Cosmin Truta
  * Copyright (c) 1998-2018 Glenn Randers-Pehrson
  * Copyright (c) 1996-1997 Andreas Dilger
  * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
@@ -288,11 +288,6 @@ png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr,
    info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
 
    info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
-
-#ifdef PNG_APNG_SUPPORTED
-   /* for non-animated png. this may be overwritten from an acTL chunk later */
-   info_ptr->num_frames = 1;
-#endif
 }
 
 #ifdef PNG_oFFs_SUPPORTED
@@ -1024,6 +1019,9 @@ png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
           info_ptr->trans_alpha = png_voidcast(png_bytep,
               png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH));
           memcpy(info_ptr->trans_alpha, trans_alpha, (size_t)num_trans);
+
+          info_ptr->valid |= PNG_INFO_tRNS;
+          info_ptr->free_me |= PNG_FREE_TRNS;
        }
        png_ptr->trans_alpha = info_ptr->trans_alpha;
    }
@@ -1163,147 +1161,6 @@ png_set_sPLT(png_const_structrp png_ptr,
 }
 #endif /* sPLT */
 
-#ifdef PNG_APNG_SUPPORTED
-png_uint_32 PNGAPI
-png_set_acTL(png_structp png_ptr, png_infop info_ptr,
-    png_uint_32 num_frames, png_uint_32 num_plays)
-{
-    png_debug1(1, "in %s storage function", "acTL");
-
-    if (png_ptr == NULL || info_ptr == NULL)
-    {
-        png_warning(png_ptr,
-                    "Call to png_set_acTL() with NULL png_ptr "
-                    "or info_ptr ignored");
-        return (0);
-    }
-    if (num_frames == 0)
-    {
-        png_warning(png_ptr,
-                    "Ignoring attempt to set acTL with num_frames zero");
-        return (0);
-    }
-    if (num_frames > PNG_UINT_31_MAX)
-    {
-        png_warning(png_ptr,
-                    "Ignoring attempt to set acTL with num_frames > 2^31-1");
-        return (0);
-    }
-    if (num_plays > PNG_UINT_31_MAX)
-    {
-        png_warning(png_ptr,
-                    "Ignoring attempt to set acTL with num_plays "
-                    "> 2^31-1");
-        return (0);
-    }
-
-    info_ptr->num_frames = num_frames;
-    info_ptr->num_plays = num_plays;
-
-    info_ptr->valid |= PNG_INFO_acTL;
-
-    return (1);
-}
-
-/* delay_num and delay_den can hold any 16-bit values including zero */
-png_uint_32 PNGAPI
-png_set_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
-    png_uint_32 width, png_uint_32 height,
-    png_uint_32 x_offset, png_uint_32 y_offset,
-    png_uint_16 delay_num, png_uint_16 delay_den,
-    png_byte dispose_op, png_byte blend_op)
-{
-    png_debug1(1, "in %s storage function", "fcTL");
-
-    if (png_ptr == NULL || info_ptr == NULL)
-    {
-        png_warning(png_ptr,
-                    "Call to png_set_fcTL() with NULL png_ptr or info_ptr "
-                    "ignored");
-        return (0);
-    }
-
-    png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset,
-                             delay_num, delay_den, dispose_op, blend_op);
-
-    if (blend_op == PNG_BLEND_OP_OVER)
-    {
-        if (!(png_ptr->color_type & PNG_COLOR_MASK_ALPHA) &&
-            !(png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
-        {
-          png_warning(png_ptr, "PNG_BLEND_OP_OVER is meaningless "
-                               "and wasteful for opaque images, ignored");
-          blend_op = PNG_BLEND_OP_SOURCE;
-        }
-    }
-
-    info_ptr->next_frame_width = width;
-    info_ptr->next_frame_height = height;
-    info_ptr->next_frame_x_offset = x_offset;
-    info_ptr->next_frame_y_offset = y_offset;
-    info_ptr->next_frame_delay_num = delay_num;
-    info_ptr->next_frame_delay_den = delay_den;
-    info_ptr->next_frame_dispose_op = dispose_op;
-    info_ptr->next_frame_blend_op = blend_op;
-
-    info_ptr->valid |= PNG_INFO_fcTL;
-
-    return (1);
-}
-
-void /* PRIVATE */
-png_ensure_fcTL_is_valid(png_structp png_ptr,
-    png_uint_32 width, png_uint_32 height,
-    png_uint_32 x_offset, png_uint_32 y_offset,
-    png_uint_16 delay_num, png_uint_16 delay_den,
-    png_byte dispose_op, png_byte blend_op)
-{
-    if (width == 0 || width > PNG_UINT_31_MAX)
-        png_error(png_ptr, "invalid width in fcTL (> 2^31-1)");
-    if (height == 0 || height > PNG_UINT_31_MAX)
-        png_error(png_ptr, "invalid height in fcTL (> 2^31-1)");
-    if (x_offset > PNG_UINT_31_MAX)
-        png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)");
-    if (y_offset > PNG_UINT_31_MAX)
-        png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)");
-    if (width + x_offset > png_ptr->first_frame_width ||
-        height + y_offset > png_ptr->first_frame_height)
-        png_error(png_ptr, "dimensions of a frame are greater than"
-                           "the ones in IHDR");
-
-    if (dispose_op != PNG_DISPOSE_OP_NONE &&
-        dispose_op != PNG_DISPOSE_OP_BACKGROUND &&
-        dispose_op != PNG_DISPOSE_OP_PREVIOUS)
-        png_error(png_ptr, "invalid dispose_op in fcTL");
-
-    if (blend_op != PNG_BLEND_OP_SOURCE &&
-        blend_op != PNG_BLEND_OP_OVER)
-        png_error(png_ptr, "invalid blend_op in fcTL");
-
-    PNG_UNUSED(delay_num)
-    PNG_UNUSED(delay_den)
-}
-
-png_uint_32 PNGAPI
-png_set_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr,
-                              png_byte is_hidden)
-{
-    png_debug(1, "in png_first_frame_is_hidden()");
-
-    if (png_ptr == NULL)
-        return 0;
-
-    if (is_hidden)
-        png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
-    else
-        png_ptr->apng_flags &= ~PNG_FIRST_FRAME_HIDDEN;
-
-    PNG_UNUSED(info_ptr)
-
-    return 1;
-}
-#endif /* PNG_APNG_SUPPORTED */
-
 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
 static png_byte
 check_location(png_const_structrp png_ptr, int location)
@@ -1472,7 +1329,7 @@ png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr,
 
 #ifdef PNG_MNG_FEATURES_SUPPORTED
 png_uint_32 PNGAPI
-png_permit_mng_features (png_structrp png_ptr, png_uint_32 mng_features)
+png_permit_mng_features(png_structrp png_ptr, png_uint_32 mng_features)
 {
    png_debug(1, "in png_permit_mng_features");
 
@@ -1779,7 +1636,7 @@ png_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask)
 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
 /* This function was added to libpng 1.2.6 */
 void PNGAPI
-png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max,
+png_set_user_limits(png_structrp png_ptr, png_uint_32 user_width_max,
     png_uint_32 user_height_max)
 {
    /* Images with dimensions larger than these limits will be
@@ -1795,7 +1652,7 @@ png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max,
 
 /* This function was added to libpng 1.4.0 */
 void PNGAPI
-png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
+png_set_chunk_cache_max(png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
 {
    if (png_ptr != NULL)
       png_ptr->user_chunk_cache_max = user_chunk_cache_max;
@@ -1803,7 +1660,7 @@ png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
 
 /* This function was added to libpng 1.4.1 */
 void PNGAPI
-png_set_chunk_malloc_max (png_structrp png_ptr,
+png_set_chunk_malloc_max(png_structrp png_ptr,
     png_alloc_size_t user_chunk_malloc_max)
 {
    if (png_ptr != NULL)