Imported from libpng-1.2.0beta2.tar
diff --git a/pngwutil.c b/pngwutil.c
index 4bbb7ad..da31079 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
- * libpng 1.2.0beta1 - May 6, 2001
+ * libpng 1.2.0beta2 - May 7, 2001
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2001 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -10,6 +10,7 @@
#define PNG_INTERNAL
#include "png.h"
+#ifdef PNG_WRITE_SUPPORTED
/* Place a 32-bit number into a buffer in PNG byte order. We work
* with unsigned numbers for convenience, although one supported
@@ -234,8 +235,8 @@
old_ptr = comp->output_ptr;
comp->output_ptr = (png_charpp)png_malloc(png_ptr,
(png_uint_32)(comp->max_output_ptr * sizeof (png_charpp)));
- png_memcpy(comp->output_ptr, old_ptr,
- old_max * sizeof (png_charp));
+ png_memcpy(comp->output_ptr, old_ptr, old_max
+ * sizeof (png_charp));
png_free(png_ptr, old_ptr);
}
else
@@ -284,7 +285,7 @@
comp->output_ptr = (png_charpp)png_malloc(png_ptr,
(png_uint_32)(comp->max_output_ptr * sizeof (png_charpp)));
png_memcpy(comp->output_ptr, old_ptr,
- old_max * sizeof (png_charp));
+ old_max * sizeof (png_charp));
png_free(png_ptr, old_ptr);
}
else
@@ -434,7 +435,7 @@
#if defined(PNG_MNG_FEATURES_SUPPORTED)
!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
- (color_type == PNG_COLOR_TYPE_RGB ||
+ (color_type == PNG_COLOR_TYPE_RGB ||
color_type == PNG_COLOR_TYPE_RGB_ALPHA) &&
(filter_type == PNG_INTRAPIXEL_DIFFERENCING)) &&
#endif
@@ -538,16 +539,23 @@
!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
#endif
num_pal == 0) || num_pal > 256)
+ {
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- png_error(png_ptr, "Invalid number of colors in palette");
- }
- else
- {
- png_warning(png_ptr, "Invalid number of colors in palette");
- return;
- }
+ png_error(png_ptr, "Invalid number of colors in palette");
+ }
+ else
+ {
+ png_warning(png_ptr, "Invalid number of colors in palette");
+ return;
+ }
+ }
+
+ if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
+ {
+ png_warning(png_ptr,
+ "Ignoring request to write a PLTE chunk in grayscale PNG");
+ return;
}
png_ptr->num_palette = (png_uint_16)num_pal;
@@ -728,7 +736,7 @@
}
/* make sure we include the NULL after the name */
- png_write_chunk_start(png_ptr, (png_bytep) png_sPLT,
+ png_write_chunk_start(png_ptr, (png_bytep)png_sPLT,
(png_uint_32)(name_len + 2 + palette_size));
png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 1);
png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, 1);
@@ -1486,8 +1494,8 @@
png_debug1(3, "sCAL total length = %d\n", total_len);
png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len);
png_write_chunk_data(png_ptr, (png_bytep)&unit, 1);
- png_write_chunk_data(png_ptr, (png_bytep)wbuf, strlen(wbuf)+1);
- png_write_chunk_data(png_ptr, (png_bytep)hbuf, strlen(hbuf));
+ png_write_chunk_data(png_ptr, (png_bytep)wbuf, png_strlen(wbuf)+1);
+ png_write_chunk_data(png_ptr, (png_bytep)hbuf, png_strlen(hbuf));
png_write_chunk_end(png_ptr);
}
@@ -1505,15 +1513,15 @@
png_debug(1, "in png_write_sCAL_s\n");
- strcpy(wbuf,(const char *)width);
- strcpy(hbuf,(const char *)height);
+ png_strcpy(wbuf,(const char *)width);
+ png_strcpy(hbuf,(const char *)height);
total_len = 1 + png_strlen(wbuf)+1 + png_strlen(hbuf);
png_debug1(3, "sCAL total length = %d\n", total_len);
png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len);
png_write_chunk_data(png_ptr, (png_bytep)&unit, 1);
- png_write_chunk_data(png_ptr, (png_bytep)wbuf, strlen(wbuf)+1);
- png_write_chunk_data(png_ptr, (png_bytep)hbuf, strlen(hbuf));
+ png_write_chunk_data(png_ptr, (png_bytep)wbuf, png_strlen(wbuf)+1);
+ png_write_chunk_data(png_ptr, (png_bytep)hbuf, png_strlen(hbuf));
png_write_chunk_end(png_ptr);
}
@@ -2631,3 +2639,4 @@
}
#endif
}
+#endif /* PNG_WRITE_SUPPORTED */