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Unified Diff: third_party/libpng/pngwrite.c

Issue 1118002: libpng: update to 1.2.43 (Closed)
Patch Set: Created 10 years, 9 months ago
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Index: third_party/libpng/pngwrite.c
diff --git a/third_party/libpng/pngwrite.c b/third_party/libpng/pngwrite.c
index bd6263c21713b2f861078cd4c363c82a79533630..e411e8165e2fac4390a48d6265d67d4732a6b712 100644
--- a/third_party/libpng/pngwrite.c
+++ b/third_party/libpng/pngwrite.c
@@ -1,15 +1,19 @@
/* pngwrite.c - general routines to write a PNG file
*
- * Last changed in libpng 1.2.37 [June 4, 2009]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2009 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.42 [January 3, 2010]
+ * Copyright (c) 1998-2010 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.)
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
*/
/* Get internal access to png.h */
#define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
#include "png.h"
#ifdef PNG_WRITE_SUPPORTED
@@ -26,23 +30,26 @@ void PNGAPI
png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_write_info_before_PLTE");
+
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))
+ /* Write PNG signature */
+ png_write_sig(png_ptr);
+#ifdef 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");
- png_ptr->mng_features_permitted=0;
+ png_ptr->mng_features_permitted = 0;
}
#endif
/* Write IHDR information. */
png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
info_ptr->filter_type,
-#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
info_ptr->interlace_type);
#else
0);
@@ -50,7 +57,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
/* The rest of these check to see if the valid field has the appropriate
* flag set, and if it does, writes the chunk.
*/
-#if defined(PNG_WRITE_gAMA_SUPPORTED)
+#ifdef PNG_WRITE_gAMA_SUPPORTED
if (info_ptr->valid & PNG_INFO_gAMA)
{
# ifdef PNG_FLOATING_POINT_SUPPORTED
@@ -62,20 +69,20 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
#endif
}
#endif
-#if defined(PNG_WRITE_sRGB_SUPPORTED)
+#ifdef PNG_WRITE_sRGB_SUPPORTED
if (info_ptr->valid & PNG_INFO_sRGB)
png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
#endif
-#if defined(PNG_WRITE_iCCP_SUPPORTED)
+#ifdef PNG_WRITE_iCCP_SUPPORTED
if (info_ptr->valid & PNG_INFO_iCCP)
png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
#endif
-#if defined(PNG_WRITE_sBIT_SUPPORTED)
+#ifdef PNG_WRITE_sBIT_SUPPORTED
if (info_ptr->valid & PNG_INFO_sBIT)
png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
#endif
-#if defined(PNG_WRITE_cHRM_SUPPORTED)
+#ifdef PNG_WRITE_cHRM_SUPPORTED
if (info_ptr->valid & PNG_INFO_cHRM)
{
#ifdef PNG_FLOATING_POINT_SUPPORTED
@@ -95,7 +102,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
#endif
}
#endif
-#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
if (info_ptr->unknown_chunks_num)
{
png_unknown_chunk *up;
@@ -106,7 +113,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
up++)
{
- int keep=png_handle_as_unknown(png_ptr, up->name);
+ int keep = png_handle_as_unknown(png_ptr, up->name);
if (keep != PNG_HANDLE_CHUNK_NEVER &&
up->location && !(up->location & PNG_HAVE_PLTE) &&
!(up->location & PNG_HAVE_IDAT) &&
@@ -144,16 +151,16 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
png_error(png_ptr, "Valid palette required for paletted images");
-#if defined(PNG_WRITE_tRNS_SUPPORTED)
+#ifdef PNG_WRITE_tRNS_SUPPORTED
if (info_ptr->valid & PNG_INFO_tRNS)
{
-#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
+#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
/* Invert the alpha channel (in tRNS) */
if ((png_ptr->transformations & PNG_INVERT_ALPHA) &&
info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
int j;
- for (j=0; j<(int)info_ptr->num_trans; j++)
+ for (j = 0; j<(int)info_ptr->num_trans; j++)
info_ptr->trans[j] = (png_byte)(255 - info_ptr->trans[j]);
}
#endif
@@ -161,30 +168,30 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->num_trans, info_ptr->color_type);
}
#endif
-#if defined(PNG_WRITE_bKGD_SUPPORTED)
+#ifdef PNG_WRITE_bKGD_SUPPORTED
if (info_ptr->valid & PNG_INFO_bKGD)
png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type);
#endif
-#if defined(PNG_WRITE_hIST_SUPPORTED)
+#ifdef PNG_WRITE_hIST_SUPPORTED
if (info_ptr->valid & PNG_INFO_hIST)
png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette);
#endif
-#if defined(PNG_WRITE_oFFs_SUPPORTED)
+#ifdef PNG_WRITE_oFFs_SUPPORTED
if (info_ptr->valid & PNG_INFO_oFFs)
png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset,
info_ptr->offset_unit_type);
#endif
-#if defined(PNG_WRITE_pCAL_SUPPORTED)
+#ifdef PNG_WRITE_pCAL_SUPPORTED
if (info_ptr->valid & PNG_INFO_pCAL)
png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0,
info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams,
info_ptr->pcal_units, info_ptr->pcal_params);
#endif
-#if defined(PNG_sCAL_SUPPORTED)
+#ifdef PNG_sCAL_SUPPORTED
if (info_ptr->valid & PNG_INFO_sCAL)
-#if defined(PNG_WRITE_sCAL_SUPPORTED)
-#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO)
+#ifdef PNG_WRITE_sCAL_SUPPORTED
+#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED)
png_write_sCAL(png_ptr, (int)info_ptr->scal_unit,
info_ptr->scal_pixel_width, info_ptr->scal_pixel_height);
#else /* !FLOATING_POINT */
@@ -199,13 +206,13 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
#endif /* WRITE_sCAL */
#endif /* sCAL */
-#if defined(PNG_WRITE_pHYs_SUPPORTED)
+#ifdef PNG_WRITE_pHYs_SUPPORTED
if (info_ptr->valid & PNG_INFO_pHYs)
png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit,
info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type);
#endif /* pHYs */
-#if defined(PNG_WRITE_tIME_SUPPORTED)
+#ifdef PNG_WRITE_tIME_SUPPORTED
if (info_ptr->valid & PNG_INFO_tIME)
{
png_write_tIME(png_ptr, &(info_ptr->mod_time));
@@ -213,13 +220,13 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
}
#endif /* tIME */
-#if defined(PNG_WRITE_sPLT_SUPPORTED)
+#ifdef PNG_WRITE_sPLT_SUPPORTED
if (info_ptr->valid & PNG_INFO_sPLT)
for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
png_write_sPLT(png_ptr, info_ptr->splt_palettes + i);
#endif /* sPLT */
-#if defined(PNG_WRITE_TEXT_SUPPORTED)
+#ifdef PNG_WRITE_TEXT_SUPPORTED
/* Check to see if we need to write text chunks */
for (i = 0; i < info_ptr->num_text; i++)
{
@@ -228,7 +235,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
/* An internationalized chunk? */
if (info_ptr->text[i].compression > 0)
{
-#if defined(PNG_WRITE_iTXt_SUPPORTED)
+#ifdef PNG_WRITE_iTXt_SUPPORTED
/* Write international chunk */
png_write_iTXt(png_ptr,
info_ptr->text[i].compression,
@@ -245,7 +252,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
/* If we want a compressed text chunk */
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt)
{
-#if defined(PNG_WRITE_zTXt_SUPPORTED)
+#ifdef PNG_WRITE_zTXt_SUPPORTED
/* Write compressed chunk */
png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0,
@@ -258,7 +265,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
}
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
{
-#if defined(PNG_WRITE_tEXt_SUPPORTED)
+#ifdef PNG_WRITE_tEXt_SUPPORTED
/* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text,
@@ -273,18 +280,18 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
}
#endif /* tEXt */
-#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
if (info_ptr->unknown_chunks_num)
{
- png_unknown_chunk *up;
+ png_unknown_chunk *up;
- png_debug(5, "writing extra chunks");
+ png_debug(5, "writing extra chunks");
- for (up = info_ptr->unknown_chunks;
- up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
- up++)
- {
- int keep=png_handle_as_unknown(png_ptr, up->name);
+ for (up = info_ptr->unknown_chunks;
+ up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
+ up++)
+ {
+ int keep = png_handle_as_unknown(png_ptr, up->name);
if (keep != PNG_HANDLE_CHUNK_NEVER &&
up->location && (up->location & PNG_HAVE_PLTE) &&
!(up->location & PNG_HAVE_IDAT) &&
@@ -293,7 +300,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
{
png_write_chunk(png_ptr, up->name, up->data, up->size);
}
- }
+ }
}
#endif
}
@@ -307,6 +314,7 @@ void PNGAPI
png_write_end(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_write_end");
+
if (png_ptr == NULL)
return;
if (!(png_ptr->mode & PNG_HAVE_IDAT))
@@ -315,16 +323,16 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
/* See if user wants us to write information chunks */
if (info_ptr != NULL)
{
-#if defined(PNG_WRITE_TEXT_SUPPORTED)
- int i; /* Local index variable */
+#ifdef PNG_WRITE_TEXT_SUPPORTED
+ int i; /* local index variable */
#endif
-#if defined(PNG_WRITE_tIME_SUPPORTED)
+#ifdef PNG_WRITE_tIME_SUPPORTED
/* Check to see if user has supplied a time chunk */
if ((info_ptr->valid & PNG_INFO_tIME) &&
!(png_ptr->mode & PNG_WROTE_tIME))
png_write_tIME(png_ptr, &(info_ptr->mod_time));
#endif
-#if defined(PNG_WRITE_TEXT_SUPPORTED)
+#ifdef PNG_WRITE_TEXT_SUPPORTED
/* Loop through comment chunks */
for (i = 0; i < info_ptr->num_text; i++)
{
@@ -333,23 +341,23 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
/* An internationalized chunk? */
if (info_ptr->text[i].compression > 0)
{
-#if defined(PNG_WRITE_iTXt_SUPPORTED)
- /* Write international chunk */
- png_write_iTXt(png_ptr,
- info_ptr->text[i].compression,
- info_ptr->text[i].key,
- info_ptr->text[i].lang,
- info_ptr->text[i].lang_key,
- info_ptr->text[i].text);
+#ifdef PNG_WRITE_iTXt_SUPPORTED
+ /* Write international chunk */
+ png_write_iTXt(png_ptr,
+ info_ptr->text[i].compression,
+ info_ptr->text[i].key,
+ info_ptr->text[i].lang,
+ info_ptr->text[i].lang_key,
+ info_ptr->text[i].text);
#else
- png_warning(png_ptr, "Unable to write international text");
+ 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;
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
}
else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
{
-#if defined(PNG_WRITE_zTXt_SUPPORTED)
+#ifdef PNG_WRITE_zTXt_SUPPORTED
/* Write compressed chunk */
png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0,
@@ -362,7 +370,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
}
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
{
-#if defined(PNG_WRITE_tEXt_SUPPORTED)
+#ifdef PNG_WRITE_tEXt_SUPPORTED
/* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0);
@@ -375,18 +383,18 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
}
}
#endif
-#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
if (info_ptr->unknown_chunks_num)
{
- png_unknown_chunk *up;
+ png_unknown_chunk *up;
- png_debug(5, "writing extra chunks");
+ png_debug(5, "writing extra chunks");
- for (up = info_ptr->unknown_chunks;
- up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
- up++)
- {
- int keep=png_handle_as_unknown(png_ptr, up->name);
+ for (up = info_ptr->unknown_chunks;
+ up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
+ up++)
+ {
+ int keep = png_handle_as_unknown(png_ptr, up->name);
if (keep != PNG_HANDLE_CHUNK_NEVER &&
up->location && (up->location & PNG_AFTER_IDAT) &&
((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
@@ -394,7 +402,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
{
png_write_chunk(png_ptr, up->name, up->data, up->size);
}
- }
+ }
}
#endif
}
@@ -408,22 +416,22 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
* do not set png_ptr->output_flush_fn to crash. If your application
* experiences a problem, please try building libpng with
* PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED defined, and report the event to
- * png-mng-implement at lists.sf.net . This kludge will be removed
- * from libpng-1.4.0.
+ * png-mng-implement at lists.sf.net .
*/
-#if defined(PNG_WRITE_FLUSH_SUPPORTED) && \
- defined(PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED)
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+# ifdef PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED
png_flush(png_ptr);
+# endif
#endif
}
-#if defined(PNG_WRITE_tIME_SUPPORTED)
-#if !defined(_WIN32_WCE)
-/* "time.h" functions are not supported on WindowsCE */
+#ifdef PNG_CONVERT_tIME_SUPPORTED
+/* "tm" structure is not supported on WindowsCE */
void PNGAPI
png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime)
{
png_debug(1, "in png_convert_from_struct_tm");
+
ptime->year = (png_uint_16)(1900 + ttime->tm_year);
ptime->month = (png_byte)(ttime->tm_mon + 1);
ptime->day = (png_byte)ttime->tm_mday;
@@ -438,11 +446,11 @@ png_convert_from_time_t(png_timep ptime, time_t ttime)
struct tm *tbuf;
png_debug(1, "in png_convert_from_time_t");
+
tbuf = gmtime(&ttime);
png_convert_from_struct_tm(ptime, tbuf);
}
#endif
-#endif
/* Initialize png_ptr structure, and allocate any memory needed */
png_structp PNGAPI
@@ -462,16 +470,18 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
{
#endif /* PNG_USER_MEM_SUPPORTED */
#ifdef PNG_SETJMP_SUPPORTED
- volatile
+ volatile
#endif
- png_structp png_ptr;
+ png_structp png_ptr;
#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
jmp_buf jmpbuf;
#endif
#endif
int i;
+
png_debug(1, "in png_create_write_struct");
+
#ifdef PNG_USER_MEM_SUPPORTED
png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
(png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
@@ -483,8 +493,8 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
/* Added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
- png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
- png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
+ png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
+ png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
#endif
#ifdef PNG_SETJMP_SUPPORTED
@@ -495,8 +505,13 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
#endif
{
png_free(png_ptr, png_ptr->zbuf);
- png_ptr->zbuf=NULL;
- png_destroy_struct(png_ptr);
+ png_ptr->zbuf = NULL;
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_destroy_struct_2((png_voidp)png_ptr,
+ (png_free_ptr)free_fn, (png_voidp)mem_ptr);
+#else
+ png_destroy_struct((png_voidp)png_ptr);
+#endif
return (NULL);
}
#ifdef USE_FAR_KEYWORD
@@ -511,12 +526,12 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
if (user_png_ver)
{
- i=0;
- do
- {
- 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)
@@ -530,14 +545,14 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
(user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
(user_png_ver[0] == '0' && user_png_ver[2] < '9'))
{
-#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
+#if defined(PNG_STDIO_SUPPORTED) && !defined(_WIN32_WCE)
char msg[80];
if (user_png_ver)
{
- png_snprintf(msg, 80,
- "Application was compiled with png.h from libpng-%.20s",
- user_png_ver);
- png_warning(png_ptr, msg);
+ png_snprintf(msg, 80,
+ "Application was compiled with png.h from libpng-%.20s",
+ user_png_ver);
+ png_warning(png_ptr, msg);
}
png_snprintf(msg, 80,
"Application is running with png.c from libpng-%.20s",
@@ -545,7 +560,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
png_warning(png_ptr, msg);
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- png_ptr->flags=0;
+ png_ptr->flags = 0;
#endif
png_error(png_ptr,
"Incompatible libpng version in application and library");
@@ -555,20 +570,21 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
/* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)png_ptr->zbuf_size);
+ (png_uint_32)png_ptr->zbuf_size);
png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
png_flush_ptr_NULL);
-#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
1, png_doublep_NULL, png_doublep_NULL);
#endif
#ifdef PNG_SETJMP_SUPPORTED
-/* Applications that neglect to set up their own setjmp() and then encounter
- a png_error() will longjmp here. Since the jmpbuf is then meaningless we
- abort instead of returning. */
+ /* Applications that neglect to set up their own setjmp() and then
+ * encounter a png_error() will longjmp here. Since the jmpbuf is
+ * then meaningless we abort instead of returning.
+ */
#ifdef USE_FAR_KEYWORD
if (setjmp(jmpbuf))
PNG_ABORT();
@@ -598,18 +614,18 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
{
/* 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 defined(PNG_STDIO_SUPPORTED) && !defined(_WIN32_WCE)
if (png_sizeof(png_struct) > png_struct_size ||
png_sizeof(png_info) > png_info_size)
{
char msg[80];
- png_ptr->warning_fn=NULL;
+ png_ptr->warning_fn = NULL;
if (user_png_ver)
{
- png_snprintf(msg, 80,
- "Application was compiled with png.h from libpng-%.20s",
- user_png_ver);
- png_warning(png_ptr, msg);
+ png_snprintf(msg, 80,
+ "Application was compiled with png.h from libpng-%.20s",
+ user_png_ver);
+ png_warning(png_ptr, msg);
}
png_snprintf(msg, 80,
"Application is running with png.c from libpng-%.20s",
@@ -618,23 +634,25 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
}
#endif
if (png_sizeof(png_struct) > png_struct_size)
- {
- png_ptr->error_fn=NULL;
+ {
+ png_ptr->error_fn = NULL;
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- png_ptr->flags=0;
+ png_ptr->flags = 0;
#endif
- png_error(png_ptr,
- "The png struct allocated by the application for writing is too small.");
- }
+ png_error(png_ptr,
+ "The png struct allocated by the application for writing is"
+ " too small.");
+ }
if (png_sizeof(png_info) > png_info_size)
- {
- png_ptr->error_fn=NULL;
+ {
+ png_ptr->error_fn = NULL;
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- png_ptr->flags=0;
+ png_ptr->flags = 0;
#endif
- png_error(png_ptr,
- "The info struct allocated by the application for writing is too small.");
- }
+ png_error(png_ptr,
+ "The info struct allocated by the application for writing is"
+ " too small.");
+ }
png_write_init_3(&png_ptr, user_png_ver, png_struct_size);
}
#endif /* PNG_1_0_X || PNG_1_2_X */
@@ -644,9 +662,9 @@ void PNGAPI
png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_size_t png_struct_size)
{
- png_structp png_ptr=*ptr_ptr;
+ png_structp png_ptr = *ptr_ptr;
#ifdef PNG_SETJMP_SUPPORTED
- jmp_buf tmp_jmp; /* To save current jump buffer */
+ jmp_buf tmp_jmp; /* to save current jump buffer */
#endif
int i = 0;
@@ -656,17 +674,16 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
do
{
- if (user_png_ver[i] != png_libpng_ver[i])
- {
+ if (user_png_ver[i] != png_libpng_ver[i])
+ {
#ifdef PNG_LEGACY_SUPPORTED
- png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
+ png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
#else
- png_ptr->warning_fn=NULL;
- png_warning(png_ptr,
+ png_ptr->warning_fn = NULL;
+ png_warning(png_ptr,
"Application uses deprecated png_write_init() and should be recompiled.");
- break;
#endif
- }
+ }
} while (png_libpng_ver[i++]);
png_debug(1, "in png_write_init_3");
@@ -677,19 +694,19 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
#endif
if (png_sizeof(png_struct) > png_struct_size)
- {
- png_destroy_struct(png_ptr);
- png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
- *ptr_ptr = png_ptr;
- }
+ {
+ png_destroy_struct(png_ptr);
+ png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
+ *ptr_ptr = png_ptr;
+ }
/* Reset all variables to 0 */
png_memset(png_ptr, 0, png_sizeof(png_struct));
/* Added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
- png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
- png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
+ png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
+ png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
#endif
#ifdef PNG_SETJMP_SUPPORTED
@@ -703,9 +720,8 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
/* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)png_ptr->zbuf_size);
-
-#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
+ (png_uint_32)png_ptr->zbuf_size);
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
1, png_doublep_NULL, png_doublep_NULL);
#endif
@@ -720,8 +736,8 @@ void PNGAPI
png_write_rows(png_structp png_ptr, png_bytepp row,
png_uint_32 num_rows)
{
- png_uint_32 i; /* Row counter */
- png_bytepp rp; /* Row pointer */
+ png_uint_32 i; /* row counter */
+ png_bytepp rp; /* row pointer */
png_debug(1, "in png_write_rows");
@@ -741,15 +757,16 @@ png_write_rows(png_structp png_ptr, png_bytepp row,
void PNGAPI
png_write_image(png_structp png_ptr, png_bytepp image)
{
- png_uint_32 i; /* Row index */
- int pass, num_pass; /* Pass variables */
- png_bytepp rp; /* Points to current row */
+ png_uint_32 i; /* row index */
+ 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");
-#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
+
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Initialize interlace handling. If image is not interlaced,
* this will set pass to 1
*/
@@ -774,6 +791,7 @@ 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)",
png_ptr->row_number, png_ptr->pass);
@@ -788,15 +806,19 @@ png_write_row(png_structp png_ptr, png_bytep row)
/* Check for transforms that have been set but were defined out */
#if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED)
if (png_ptr->transformations & PNG_INVERT_MONO)
- png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined.");
+ png_warning(png_ptr,
+ "PNG_WRITE_INVERT_SUPPORTED is not defined.");
#endif
#if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED)
if (png_ptr->transformations & PNG_FILLER)
- png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined.");
+ png_warning(png_ptr,
+ "PNG_WRITE_FILLER_SUPPORTED is not defined.");
#endif
-#if !defined(PNG_WRITE_PACKSWAP_SUPPORTED) && defined(PNG_READ_PACKSWAP_SUPPORTED)
+#if !defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \
+ defined(PNG_READ_PACKSWAP_SUPPORTED)
if (png_ptr->transformations & PNG_PACKSWAP)
- png_warning(png_ptr, "PNG_WRITE_PACKSWAP_SUPPORTED is not defined.");
+ png_warning(png_ptr,
+ "PNG_WRITE_PACKSWAP_SUPPORTED is not defined.");
#endif
#if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED)
if (png_ptr->transformations & PNG_PACK)
@@ -818,7 +840,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
png_write_start_row(png_ptr);
}
-#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* If interlaced and not interested in row, return */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{
@@ -899,7 +921,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
png_memcpy_check(png_ptr, png_ptr->row_buf + 1, row,
png_ptr->row_info.rowbytes);
-#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Handle interlacing */
if (png_ptr->interlaced && png_ptr->pass < 6 &&
(png_ptr->transformations & PNG_INTERLACE))
@@ -919,7 +941,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
if (png_ptr->transformations)
png_do_write_transformations(png_ptr);
-#if defined(PNG_MNG_FEATURES_SUPPORTED)
+#ifdef PNG_MNG_FEATURES_SUPPORTED
/* Write filter_method 64 (intrapixel differencing) only if
* 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
* 2. Libpng did not write a PNG signature (this filter_method is only
@@ -944,12 +966,13 @@ png_write_row(png_structp png_ptr, png_bytep row)
(*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
}
-#if defined(PNG_WRITE_FLUSH_SUPPORTED)
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
/* Set the automatic flush interval or 0 to turn flushing off */
void PNGAPI
png_set_flush(png_structp png_ptr, int nrows)
{
png_debug(1, "in png_set_flush");
+
if (png_ptr == NULL)
return;
png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
@@ -962,6 +985,7 @@ png_write_flush(png_structp png_ptr)
int wrote_IDAT;
png_debug(1, "in png_write_flush");
+
if (png_ptr == NULL)
return;
/* We have already written out all of the data */
@@ -1022,6 +1046,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
#endif
png_debug(1, "in png_destroy_write_struct");
+
if (png_ptr_ptr != NULL)
{
png_ptr = *png_ptr_ptr;
@@ -1048,11 +1073,11 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
{
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
if (png_ptr->num_chunk_list)
{
png_free(png_ptr, png_ptr->chunk_list);
- png_ptr->chunk_list=NULL;
+ png_ptr->chunk_list = NULL;
png_ptr->num_chunk_list = 0;
}
#endif
@@ -1096,13 +1121,14 @@ png_write_destroy(png_structp png_ptr)
#endif
png_debug(1, "in png_write_destroy");
+
/* Free any memory zlib uses */
deflateEnd(&png_ptr->zstream);
/* 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_FILTER
+#ifdef PNG_WRITE_FILTER_SUPPORTED
png_free(png_ptr, png_ptr->prev_row);
png_free(png_ptr, png_ptr->sub_row);
png_free(png_ptr, png_ptr->up_row);
@@ -1110,11 +1136,11 @@ png_write_destroy(png_structp png_ptr)
png_free(png_ptr, png_ptr->paeth_row);
#endif
-#if defined(PNG_TIME_RFC1123_SUPPORTED)
+#ifdef PNG_TIME_RFC1123_SUPPORTED
png_free(png_ptr, png_ptr->time_buffer);
#endif
-#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
png_free(png_ptr, png_ptr->prev_filters);
png_free(png_ptr, png_ptr->filter_weights);
png_free(png_ptr, png_ptr->inv_filter_weights);
@@ -1153,9 +1179,10 @@ void PNGAPI
png_set_filter(png_structp png_ptr, int method, int filters)
{
png_debug(1, "in png_set_filter");
+
if (png_ptr == NULL)
return;
-#if defined(PNG_MNG_FEATURES_SUPPORTED)
+#ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
(method == PNG_INTRAPIXEL_DIFFERENCING))
method = PNG_FILTER_TYPE_BASE;
@@ -1164,26 +1191,26 @@ png_set_filter(png_structp png_ptr, int method, int filters)
{
switch (filters & (PNG_ALL_FILTERS | 0x07))
{
-#ifndef PNG_NO_WRITE_FILTER
+#ifdef PNG_WRITE_FILTER_SUPPORTED
case 5:
case 6:
case 7: png_warning(png_ptr, "Unknown row filter for method 0");
-#endif /* PNG_NO_WRITE_FILTER */
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
case PNG_FILTER_VALUE_NONE:
- png_ptr->do_filter=PNG_FILTER_NONE; break;
-#ifndef PNG_NO_WRITE_FILTER
+ png_ptr->do_filter = PNG_FILTER_NONE; break;
+#ifdef PNG_WRITE_FILTER_SUPPORTED
case PNG_FILTER_VALUE_SUB:
- png_ptr->do_filter=PNG_FILTER_SUB; break;
+ png_ptr->do_filter = PNG_FILTER_SUB; break;
case PNG_FILTER_VALUE_UP:
- png_ptr->do_filter=PNG_FILTER_UP; break;
+ png_ptr->do_filter = PNG_FILTER_UP; break;
case PNG_FILTER_VALUE_AVG:
- png_ptr->do_filter=PNG_FILTER_AVG; break;
+ png_ptr->do_filter = PNG_FILTER_AVG; break;
case PNG_FILTER_VALUE_PAETH:
- png_ptr->do_filter=PNG_FILTER_PAETH; break;
+ 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 */
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
}
/* If we have allocated the row_buf, this means we have already started
@@ -1197,7 +1224,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
*/
if (png_ptr->row_buf != NULL)
{
-#ifndef PNG_NO_WRITE_FILTER
+#ifdef PNG_WRITE_FILTER_SUPPORTED
if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
{
png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
@@ -1252,7 +1279,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
}
if (png_ptr->do_filter == PNG_NO_FILTERS)
-#endif /* PNG_NO_WRITE_FILTER */
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
png_ptr->do_filter = PNG_FILTER_NONE;
}
}
@@ -1267,7 +1294,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
* filtered data going to zlib more consistent, hopefully resulting in
* better compression.
*/
-#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* GRR 970116 */
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */
void PNGAPI
png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
int num_weights, png_doublep filter_weights,
@@ -1276,6 +1303,7 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
int i;
png_debug(1, "in png_set_filter_heuristics");
+
if (png_ptr == NULL)
return;
if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST)
@@ -1390,6 +1418,7 @@ void PNGAPI
png_set_compression_level(png_structp png_ptr, int level)
{
png_debug(1, "in png_set_compression_level");
+
if (png_ptr == NULL)
return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL;
@@ -1400,6 +1429,7 @@ void PNGAPI
png_set_compression_mem_level(png_structp png_ptr, int mem_level)
{
png_debug(1, "in png_set_compression_mem_level");
+
if (png_ptr == NULL)
return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL;
@@ -1410,6 +1440,7 @@ void PNGAPI
png_set_compression_strategy(png_structp png_ptr, int strategy)
{
png_debug(1, "in png_set_compression_strategy");
+
if (png_ptr == NULL)
return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
@@ -1430,7 +1461,7 @@ png_set_compression_window_bits(png_structp png_ptr, int window_bits)
if (window_bits == 8)
{
png_warning(png_ptr, "Compression window is being reset to 512");
- window_bits=9;
+ window_bits = 9;
}
#endif
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS;
@@ -1441,6 +1472,7 @@ void PNGAPI
png_set_compression_method(png_structp png_ptr, int method)
{
png_debug(1, "in png_set_compression_method");
+
if (png_ptr == NULL)
return;
if (method != 8)
@@ -1457,12 +1489,13 @@ png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)
png_ptr->write_row_fn = write_row_fn;
}
-#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
void PNGAPI
png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
write_user_transform_fn)
{
png_debug(1, "in png_set_write_user_transform_fn");
+
if (png_ptr == NULL)
return;
png_ptr->transformations |= PNG_USER_TRANSFORM;
@@ -1471,31 +1504,26 @@ png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
#endif
-#if defined(PNG_INFO_IMAGE_SUPPORTED)
+#ifdef PNG_INFO_IMAGE_SUPPORTED
void PNGAPI
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)
- png_set_invert_alpha(png_ptr);
-#endif
/* Write the file header information. */
png_write_info(png_ptr, info_ptr);
/* ------ these transformations don't touch the info structure ------- */
-#if defined(PNG_WRITE_INVERT_SUPPORTED)
+#ifdef PNG_WRITE_INVERT_SUPPORTED
/* Invert monochrome pixels */
if (transforms & PNG_TRANSFORM_INVERT_MONO)
png_set_invert_mono(png_ptr);
#endif
-#if defined(PNG_WRITE_SHIFT_SUPPORTED)
+#ifdef PNG_WRITE_SHIFT_SUPPORTED
/* Shift the pixels up to a legal bit depth and fill in
* as appropriate to correctly scale the image.
*/
@@ -1504,19 +1532,19 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
png_set_shift(png_ptr, &info_ptr->sig_bit);
#endif
-#if defined(PNG_WRITE_PACK_SUPPORTED)
+#ifdef PNG_WRITE_PACK_SUPPORTED
/* Pack pixels into bytes */
if (transforms & PNG_TRANSFORM_PACKING)
png_set_packing(png_ptr);
#endif
-#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
+#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
/* Swap location of alpha bytes from ARGB to RGBA */
if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
png_set_swap_alpha(png_ptr);
#endif
-#if defined(PNG_WRITE_FILLER_SUPPORTED)
+#ifdef PNG_WRITE_FILLER_SUPPORTED
/* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */
if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
@@ -1524,24 +1552,30 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
#endif
-#if defined(PNG_WRITE_BGR_SUPPORTED)
+#ifdef PNG_WRITE_BGR_SUPPORTED
/* Flip BGR pixels to RGB */
if (transforms & PNG_TRANSFORM_BGR)
png_set_bgr(png_ptr);
#endif
-#if defined(PNG_WRITE_SWAP_SUPPORTED)
+#ifdef PNG_WRITE_SWAP_SUPPORTED
/* Swap bytes of 16-bit files to most significant byte first */
if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
png_set_swap(png_ptr);
#endif
-#if defined(PNG_WRITE_PACKSWAP_SUPPORTED)
+#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
/* Swap bits of 1, 2, 4 bit packed pixel formats */
if (transforms & PNG_TRANSFORM_PACKSWAP)
png_set_packswap(png_ptr);
#endif
+#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
+ /* Invert the alpha channel from opacity to transparency */
+ if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
+ png_set_invert_alpha(png_ptr);
+#endif
+
/* ----------------------- end of transformations ------------------- */
/* Write the bits */
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