commit 76e5fd642ee752739be2327625d77e322a59813f
author Glenn Randers-Pehrson <glennrp at users.sourceforge.net> Thu Dec 28 07:50:05 2000 -0600
committer Glenn Randers-Pehrson <glennrp at users.sourceforge.net> Mon Apr 06 16:05:49 2009 -0500
tree 78d18f6314183e5adadf773ee0939773a38b1ae4
parent f05f8033b80ebebafac9391bae6d6f46b2ffac9c

Imported from libpng-1.0.9beta7.tar

pngset.c

diff --git a/pngset.c b/pngset.c
index a85feec..3c9e265 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * libpng 1.0.9rc1 - December 23, 2000
+ * libpng 1.0.9beta7 - December 28, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -133,12 +133,31 @@
 void PNGAPI
 png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
 {
+   int	i;
+
    png_debug1(1, "in %s storage function\n", "hIST");
    if (png_ptr == NULL || info_ptr == NULL)
       return;
+   if (info_ptr->num_palette == 0)
+       png_warning(png_ptr,
+		   "Palette size 0, hIST allocation skipped.");
 
-   info_ptr->hist = hist;
+#ifdef PNG_FREE_ME_SUPPORTED
+   png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
+#endif
+   png_ptr->hist = (png_uint_16p)png_malloc(png_ptr,
+      (png_uint_32)(info_ptr->num_palette * sizeof (png_uint_16)));
+
+   for (i = 0; i < info_ptr->num_palette; i++)
+       png_ptr->hist[i] = hist[i];
+   info_ptr->hist = png_ptr->hist;
    info_ptr->valid |= PNG_INFO_hIST;
+
+#ifdef PNG_FREE_ME_SUPPORTED
+   info_ptr->free_me |= PNG_FREE_HIST;
+#else
+   png_ptr->flags |= PNG_FLAG_FREE_HIST;
+#endif
 }
 #endif
 
@@ -320,9 +339,26 @@
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
-   info_ptr->palette = palette;
+   /*
+    * It may not actually be necessary to set png_ptr->palette here;
+    * we do it for backward compatibility with the way the png_handle_tRNS
+    * function used to do the allocation.
+    */
+#ifdef PNG_FREE_ME_SUPPORTED
+   png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
+#endif
+   png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)num_palette,
+      sizeof (png_color));
+   memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color));
+   info_ptr->palette = png_ptr->palette;
+   info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
 
-   info_ptr->num_palette = (png_uint_16)num_palette;
+#ifdef PNG_FREE_ME_SUPPORTED
+   info_ptr->free_me |= PNG_FREE_PLTE;
+#else
+   png_ptr->flags |= PNG_FLAG_FREE_PLTE;
+#endif
+
    info_ptr->valid |= PNG_INFO_PLTE;
 }
 
@@ -631,7 +667,23 @@
       return;
 
    if (trans != NULL)
-      info_ptr->trans = trans;
+   {
+       /*
+	* It may not actually be necessary to set png_ptr->trans here;
+	* we do it for backward compatibility with the way the png_handle_tRNS
+	* function used to do the allocation.
+	*/
+#ifdef PNG_FREE_ME_SUPPORTED
+       png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
+#endif
+       png_ptr->trans = info_ptr->trans = png_malloc(png_ptr, num_trans);
+       memcpy(info_ptr->trans, trans, num_trans);
+#ifdef PNG_FREE_ME_SUPPORTED
+       info_ptr->free_me |= PNG_FREE_TRNS;
+#else
+       png_ptr->flags |= PNG_FLAG_FREE_TRNS;
+#endif
+   }
 
    if (trans_values != NULL)
    {