/* pngwrite.c - general routines to write a PNG file
*
- * libpng 1.2.8 - December 3, 2004
+ * Last changed in libpng 1.2.27 [April 29, 2008]
* For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2004 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*/
png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_write_info_before_PLTE\n");
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
{
png_write_sig(png_ptr); /* write PNG signature */
#if defined(PNG_MNG_FEATURES_SUPPORTED)
if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted))
{
- png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
+ png_warning(png_ptr,"MNG features are not allowed in a PNG datastream");
png_ptr->mng_features_permitted=0;
}
#endif
((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
(png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
{
+ if (up->size == 0)
+ png_warning(png_ptr, "Writing zero-length unknown chunk");
png_write_chunk(png_ptr, up->name, up->data, up->size);
}
}
png_debug(1, "in png_write_info\n");
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
+
png_write_info_before_PLTE(png_ptr, info_ptr);
if (info_ptr->valid & PNG_INFO_PLTE)
png_write_PLTE(png_ptr, info_ptr->palette,
(png_uint_32)info_ptr->num_palette);
else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- png_error(png_ptr, "Valid palette required for paletted images\n");
+ png_error(png_ptr, "Valid palette required for paletted images");
#if defined(PNG_WRITE_tRNS_SUPPORTED)
if (info_ptr->valid & PNG_INFO_tRNS)
info_ptr->scal_s_width, info_ptr->scal_s_height);
#else
png_warning(png_ptr,
- "png_write_sCAL not supported; sCAL chunk not written.\n");
+ "png_write_sCAL not supported; sCAL chunk not written.");
#endif
#endif
#endif
info_ptr->text[i].lang_key,
info_ptr->text[i].text);
#else
- png_warning(png_ptr, "Unable to write international text\n");
+ png_warning(png_ptr, "Unable to write international text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
info_ptr->text[i].text, 0,
info_ptr->text[i].compression);
#else
- png_warning(png_ptr, "Unable to write compressed text\n");
+ png_warning(png_ptr, "Unable to write compressed text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
info_ptr->text[i].text,
0);
#else
- png_warning(png_ptr, "Unable to write uncompressed text\n");
+ png_warning(png_ptr, "Unable to write uncompressed text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
png_write_end(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_write_end\n");
+ if (png_ptr == NULL)
+ return;
if (!(png_ptr->mode & PNG_HAVE_IDAT))
png_error(png_ptr, "No IDATs written into file");
info_ptr->text[i].lang_key,
info_ptr->text[i].text);
#else
- png_warning(png_ptr, "Unable to write international text\n");
+ png_warning(png_ptr, "Unable to write international text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
info_ptr->text[i].text, 0,
info_ptr->text[i].compression);
#else
- png_warning(png_ptr, "Unable to write compressed text\n");
+ png_warning(png_ptr, "Unable to write compressed text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0);
#else
- png_warning(png_ptr, "Unable to write uncompressed text\n");
+ png_warning(png_ptr, "Unable to write uncompressed text");
#endif
/* Mark this chunk as written */
/* write end of PNG file */
png_write_IEND(png_ptr);
-#if 0
-/* This flush, added in libpng-1.0.8, causes some applications to crash
- because they do not set png_ptr->output_flush_fn */
- png_flush(png_ptr);
-#endif
}
#if defined(PNG_WRITE_tIME_SUPPORTED)
if (png_ptr == NULL)
return (NULL);
-#if !defined(PNG_1_0_X)
-#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
- png_init_mmx_flags(png_ptr); /* 1.2.0 addition */
-#endif
-#endif /* PNG_1_0_X */
-
/* added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
#endif /* PNG_USER_MEM_SUPPORTED */
png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
- i=0;
- do
+ if(user_png_ver)
{
- if(user_png_ver[i] != png_libpng_ver[i])
- png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
- } while (png_libpng_ver[i++]);
+ i=0;
+ do
+ {
+ if(user_png_ver[i] != png_libpng_ver[i])
+ png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
+ } while (png_libpng_ver[i++]);
+ }
if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
{
char msg[80];
if (user_png_ver)
{
- sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+ png_snprintf(msg, 80,
+ "Application was compiled with png.h from libpng-%.20s",
user_png_ver);
png_warning(png_ptr, msg);
}
- sprintf(msg, "Application is running with png.c from libpng-%.20s",
+ png_snprintf(msg, 80,
+ "Application is running with png.c from libpng-%.20s",
png_libpng_ver);
png_warning(png_ptr, msg);
#endif
}
/* Initialize png_ptr structure, and allocate any memory needed */
+#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
+/* Deprecated. */
#undef png_write_init
void PNGAPI
png_write_init(png_structp png_ptr)
png_size_t png_struct_size, png_size_t png_info_size)
{
/* We only come here via pre-1.0.12-compiled applications */
+ if(png_ptr == NULL) return;
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
if(png_sizeof(png_struct) > png_struct_size ||
png_sizeof(png_info) > png_info_size)
png_ptr->warning_fn=NULL;
if (user_png_ver)
{
- sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+ png_snprintf(msg, 80,
+ "Application was compiled with png.h from libpng-%.20s",
user_png_ver);
png_warning(png_ptr, msg);
}
- sprintf(msg, "Application is running with png.c from libpng-%.20s",
+ png_snprintf(msg, 80,
+ "Application is running with png.c from libpng-%.20s",
png_libpng_ver);
png_warning(png_ptr, msg);
}
}
png_write_init_3(&png_ptr, user_png_ver, png_struct_size);
}
+#endif /* PNG_1_0_X || PNG_1_2_X */
void PNGAPI
#ifdef PNG_SETJMP_SUPPORTED
jmp_buf tmp_jmp; /* to save current jump buffer */
#endif
+
int i = 0;
+
+ if (png_ptr == NULL)
+ return;
+
do
{
if (user_png_ver[i] != png_libpng_ver[i])
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
#endif
-#if !defined(PNG_1_0_X)
-#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
- png_init_mmx_flags(png_ptr); /* 1.2.0 addition */
-#endif
-#endif /* PNG_1_0_X */
-
#ifdef PNG_SETJMP_SUPPORTED
/* restore jump buffer */
png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
png_bytepp rp; /* row pointer */
png_debug(1, "in png_write_rows\n");
+
+ if (png_ptr == NULL)
+ return;
+
/* loop through the rows */
for (i = 0, rp = row; i < num_rows; i++, rp++)
{
int pass, num_pass; /* pass variables */
png_bytepp rp; /* points to current row */
+ if (png_ptr == NULL)
+ return;
+
png_debug(1, "in png_write_image\n");
#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
/* intialize interlace handling. If image is not interlaced,
void PNGAPI
png_write_row(png_structp png_ptr, png_bytep row)
{
+ if (png_ptr == NULL)
+ return;
png_debug2(1, "in png_write_row (row %ld, pass %d)\n",
png_ptr->row_number, png_ptr->pass);
+
/* initialize transformations and other stuff if first time */
if (png_ptr->row_number == 0 && png_ptr->pass == 0)
{
png_set_flush(png_structp png_ptr, int nrows)
{
png_debug(1, "in png_set_flush\n");
+ if (png_ptr == NULL)
+ return;
png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
}
int wrote_IDAT;
png_debug(1, "in png_write_flush\n");
+ if (png_ptr == NULL)
+ return;
/* We have already written out all of the data */
if (png_ptr->row_number >= png_ptr->num_rows)
return;
#endif
}
+#ifdef PNG_USER_MEM_SUPPORTED
+ if (png_ptr != NULL)
+ {
+ free_fn = png_ptr->free_fn;
+ mem_ptr = png_ptr->mem_ptr;
+ }
+#endif
+
if (info_ptr_ptr != NULL)
info_ptr = *info_ptr_ptr;
if (info_ptr != NULL)
{
- png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
+ if (png_ptr != NULL)
+ {
+ png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- if (png_ptr->num_chunk_list)
- {
- png_free(png_ptr, png_ptr->chunk_list);
- png_ptr->chunk_list=NULL;
- png_ptr->num_chunk_list=0;
- }
+ if (png_ptr->num_chunk_list)
+ {
+ png_free(png_ptr, png_ptr->chunk_list);
+ png_ptr->chunk_list=NULL;
+ png_ptr->num_chunk_list=0;
+ }
#endif
+ }
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
/* free our memory. png_free checks NULL for us. */
png_free(png_ptr, png_ptr->zbuf);
png_free(png_ptr, png_ptr->row_buf);
+#ifndef PNG_NO_WRITE_FILTERING
png_free(png_ptr, png_ptr->prev_row);
png_free(png_ptr, png_ptr->sub_row);
png_free(png_ptr, png_ptr->up_row);
png_free(png_ptr, png_ptr->avg_row);
png_free(png_ptr, png_ptr->paeth_row);
+#endif
#if defined(PNG_TIME_RFC1123_SUPPORTED)
png_free(png_ptr, png_ptr->time_buffer);
png_set_filter(png_structp png_ptr, int method, int filters)
{
png_debug(1, "in png_set_filter\n");
+ if (png_ptr == NULL)
+ return;
#if defined(PNG_MNG_FEATURES_SUPPORTED)
if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
(method == PNG_INTRAPIXEL_DIFFERENCING))
{
switch (filters & (PNG_ALL_FILTERS | 0x07))
{
+#ifndef PNG_NO_WRITE_FILTER
case 5:
case 6:
case 7: png_warning(png_ptr, "Unknown row filter for method 0");
- case PNG_FILTER_VALUE_NONE: png_ptr->do_filter=PNG_FILTER_NONE; break;
- case PNG_FILTER_VALUE_SUB: png_ptr->do_filter=PNG_FILTER_SUB; break;
- case PNG_FILTER_VALUE_UP: png_ptr->do_filter=PNG_FILTER_UP; break;
- case PNG_FILTER_VALUE_AVG: png_ptr->do_filter=PNG_FILTER_AVG; break;
- case PNG_FILTER_VALUE_PAETH: png_ptr->do_filter=PNG_FILTER_PAETH;break;
+#endif /* PNG_NO_WRITE_FILTER */
+ case PNG_FILTER_VALUE_NONE:
+ png_ptr->do_filter=PNG_FILTER_NONE; break;
+#ifndef PNG_NO_WRITE_FILTER
+ case PNG_FILTER_VALUE_SUB:
+ png_ptr->do_filter=PNG_FILTER_SUB; break;
+ case PNG_FILTER_VALUE_UP:
+ png_ptr->do_filter=PNG_FILTER_UP; break;
+ case PNG_FILTER_VALUE_AVG:
+ png_ptr->do_filter=PNG_FILTER_AVG; break;
+ case PNG_FILTER_VALUE_PAETH:
+ png_ptr->do_filter=PNG_FILTER_PAETH; break;
default: png_ptr->do_filter = (png_byte)filters; break;
+#else
+ default: png_warning(png_ptr, "Unknown row filter for method 0");
+#endif /* PNG_NO_WRITE_FILTER */
}
/* If we have allocated the row_buf, this means we have already started
*/
if (png_ptr->row_buf != NULL)
{
+#ifndef PNG_NO_WRITE_FILTER
if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
{
png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
}
if (png_ptr->do_filter == PNG_NO_FILTERS)
+#endif /* PNG_NO_WRITE_FILTER */
png_ptr->do_filter = PNG_FILTER_NONE;
}
}
int i;
png_debug(1, "in png_set_filter_heuristics\n");
+ if (png_ptr == NULL)
+ return;
if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST)
{
png_warning(png_ptr, "Unknown filter heuristic method");
png_set_compression_level(png_structp png_ptr, int level)
{
png_debug(1, "in png_set_compression_level\n");
+ if (png_ptr == NULL)
+ return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL;
png_ptr->zlib_level = level;
}
png_set_compression_mem_level(png_structp png_ptr, int mem_level)
{
png_debug(1, "in png_set_compression_mem_level\n");
+ if (png_ptr == NULL)
+ return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL;
png_ptr->zlib_mem_level = mem_level;
}
png_set_compression_strategy(png_structp png_ptr, int strategy)
{
png_debug(1, "in png_set_compression_strategy\n");
+ if (png_ptr == NULL)
+ return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
png_ptr->zlib_strategy = strategy;
}
void PNGAPI
png_set_compression_window_bits(png_structp png_ptr, int window_bits)
{
+ if (png_ptr == NULL)
+ return;
if (window_bits > 15)
png_warning(png_ptr, "Only compression windows <= 32k supported by PNG");
else if (window_bits < 8)
png_set_compression_method(png_structp png_ptr, int method)
{
png_debug(1, "in png_set_compression_method\n");
+ if (png_ptr == NULL)
+ return;
if (method != 8)
png_warning(png_ptr, "Only compression method 8 is supported by PNG");
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD;
void PNGAPI
png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)
{
+ if (png_ptr == NULL)
+ return;
png_ptr->write_row_fn = write_row_fn;
}
write_user_transform_fn)
{
png_debug(1, "in png_set_write_user_transform_fn\n");
+ if (png_ptr == NULL)
+ return;
png_ptr->transformations |= PNG_USER_TRANSFORM;
png_ptr->write_user_transform_fn = write_user_transform_fn;
}
png_write_png(png_structp png_ptr, png_infop info_ptr,
int transforms, voidp params)
{
+ if (png_ptr == NULL || info_ptr == NULL)
+ return;
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
/* invert the alpha channel from opacity to transparency */
if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
/* It is REQUIRED to call this to finish writing the rest of the file */
png_write_end(png_ptr, info_ptr);
- if(transforms == 0 || params == NULL)
- /* quiet compiler warnings */ return;
+ transforms = transforms; /* quiet compiler warnings */
+ params = params;
}
#endif
#endif /* PNG_WRITE_SUPPORTED */
projects / opencv / blobdiff