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[master] Ported cosmetic changes to pngwrite.c

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from libpng-1.4.0beta87.
This commit is contained in:
Glenn Randers-Pehrson 2009-10-17 18:30:44 -05:00
parent eda90ace80
commit d4e3ef6eae
1 changed files with 184 additions and 159 deletions
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225
pngwrite.c
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@ -1,7 +1,7 @@
/* pngwrite.c - general routines to write a PNG file /* pngwrite.c - general routines to write a PNG file
* *
* Last changed in libpng 1.2.37 [June 4, 2009] * Last changed in libpng 1.2.41 [October 17, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -29,23 +29,25 @@ void PNGAPI
png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
{ {
png_debug(1, "in png_write_info_before_PLTE"); png_debug(1, "in png_write_info_before_PLTE");
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
{ {
png_write_sig(png_ptr); /* Write PNG signature */ /* Write PNG signature */
#if defined(PNG_MNG_FEATURES_SUPPORTED) png_write_sig(png_ptr);
#ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted)) 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_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 #endif
/* Write IHDR information. */ /* Write IHDR information. */
png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height, 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->bit_depth, info_ptr->color_type, info_ptr->compression_type,
info_ptr->filter_type, info_ptr->filter_type,
#if defined(PNG_WRITE_INTERLACING_SUPPORTED) #ifdef PNG_WRITE_INTERLACING_SUPPORTED
info_ptr->interlace_type); info_ptr->interlace_type);
#else #else
0); 0);
@ -53,7 +55,7 @@ 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 /* The rest of these check to see if the valid field has the appropriate
* flag set, and if it does, writes the chunk. * 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) if (info_ptr->valid & PNG_INFO_gAMA)
{ {
# ifdef PNG_FLOATING_POINT_SUPPORTED # ifdef PNG_FLOATING_POINT_SUPPORTED
@ -65,20 +67,20 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
#endif #endif
} }
#endif #endif
#if defined(PNG_WRITE_sRGB_SUPPORTED) #ifdef PNG_WRITE_sRGB_SUPPORTED
if (info_ptr->valid & PNG_INFO_sRGB) if (info_ptr->valid & PNG_INFO_sRGB)
png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent); png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
#endif #endif
#if defined(PNG_WRITE_iCCP_SUPPORTED) #ifdef PNG_WRITE_iCCP_SUPPORTED
if (info_ptr->valid & PNG_INFO_iCCP) if (info_ptr->valid & PNG_INFO_iCCP)
png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE, png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
info_ptr->iccp_profile, (int)info_ptr->iccp_proflen); info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
#endif #endif
#if defined(PNG_WRITE_sBIT_SUPPORTED) #ifdef PNG_WRITE_sBIT_SUPPORTED
if (info_ptr->valid & PNG_INFO_sBIT) if (info_ptr->valid & PNG_INFO_sBIT)
png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type); png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
#endif #endif
#if defined(PNG_WRITE_cHRM_SUPPORTED) #ifdef PNG_WRITE_cHRM_SUPPORTED
if (info_ptr->valid & PNG_INFO_cHRM) if (info_ptr->valid & PNG_INFO_cHRM)
{ {
#ifdef PNG_FLOATING_POINT_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED
@ -98,7 +100,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
#endif #endif
} }
#endif #endif
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
if (info_ptr->unknown_chunks_num) if (info_ptr->unknown_chunks_num)
{ {
png_unknown_chunk *up; png_unknown_chunk *up;
@ -109,7 +111,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
up++) 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 && if (keep != PNG_HANDLE_CHUNK_NEVER &&
up->location && !(up->location & PNG_HAVE_PLTE) && up->location && !(up->location & PNG_HAVE_PLTE) &&
!(up->location & PNG_HAVE_IDAT) && !(up->location & PNG_HAVE_IDAT) &&
@ -147,16 +149,16 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
png_error(png_ptr, "Valid palette required for paletted images"); 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 (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) */ /* Invert the alpha channel (in tRNS) */
if ((png_ptr->transformations & PNG_INVERT_ALPHA) && if ((png_ptr->transformations & PNG_INVERT_ALPHA) &&
info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{ {
int j; 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]); info_ptr->trans[j] = (png_byte)(255 - info_ptr->trans[j]);
} }
#endif #endif
@ -164,29 +166,29 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->num_trans, info_ptr->color_type); info_ptr->num_trans, info_ptr->color_type);
} }
#endif #endif
#if defined(PNG_WRITE_bKGD_SUPPORTED) #ifdef PNG_WRITE_bKGD_SUPPORTED
if (info_ptr->valid & PNG_INFO_bKGD) if (info_ptr->valid & PNG_INFO_bKGD)
png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type); png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type);
#endif #endif
#if defined(PNG_WRITE_hIST_SUPPORTED) #ifdef PNG_WRITE_hIST_SUPPORTED
if (info_ptr->valid & PNG_INFO_hIST) if (info_ptr->valid & PNG_INFO_hIST)
png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette); png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette);
#endif #endif
#if defined(PNG_WRITE_oFFs_SUPPORTED) #ifdef PNG_WRITE_oFFs_SUPPORTED
if (info_ptr->valid & PNG_INFO_oFFs) if (info_ptr->valid & PNG_INFO_oFFs)
png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset, png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset,
info_ptr->offset_unit_type); info_ptr->offset_unit_type);
#endif #endif
#if defined(PNG_WRITE_pCAL_SUPPORTED) #ifdef PNG_WRITE_pCAL_SUPPORTED
if (info_ptr->valid & PNG_INFO_pCAL) if (info_ptr->valid & PNG_INFO_pCAL)
png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0, 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_X1, info_ptr->pcal_type, info_ptr->pcal_nparams,
info_ptr->pcal_units, info_ptr->pcal_params); info_ptr->pcal_units, info_ptr->pcal_params);
#endif #endif
#if defined(PNG_sCAL_SUPPORTED) #ifdef PNG_sCAL_SUPPORTED
if (info_ptr->valid & PNG_INFO_sCAL) if (info_ptr->valid & PNG_INFO_sCAL)
#if defined(PNG_WRITE_sCAL_SUPPORTED) #ifdef PNG_WRITE_sCAL_SUPPORTED
#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO) #if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO)
png_write_sCAL(png_ptr, (int)info_ptr->scal_unit, png_write_sCAL(png_ptr, (int)info_ptr->scal_unit,
info_ptr->scal_pixel_width, info_ptr->scal_pixel_height); info_ptr->scal_pixel_width, info_ptr->scal_pixel_height);
@ -202,13 +204,13 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
#endif /* WRITE_sCAL */ #endif /* WRITE_sCAL */
#endif /* sCAL */ #endif /* sCAL */
#if defined(PNG_WRITE_pHYs_SUPPORTED) #ifdef PNG_WRITE_pHYs_SUPPORTED
if (info_ptr->valid & PNG_INFO_pHYs) if (info_ptr->valid & PNG_INFO_pHYs)
png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit, png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit,
info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type); info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type);
#endif /* pHYs */ #endif /* pHYs */
#if defined(PNG_WRITE_tIME_SUPPORTED) #ifdef PNG_WRITE_tIME_SUPPORTED
if (info_ptr->valid & PNG_INFO_tIME) if (info_ptr->valid & PNG_INFO_tIME)
{ {
png_write_tIME(png_ptr, &(info_ptr->mod_time)); png_write_tIME(png_ptr, &(info_ptr->mod_time));
@ -216,13 +218,13 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
} }
#endif /* tIME */ #endif /* tIME */
#if defined(PNG_WRITE_sPLT_SUPPORTED) #ifdef PNG_WRITE_sPLT_SUPPORTED
if (info_ptr->valid & PNG_INFO_sPLT) if (info_ptr->valid & PNG_INFO_sPLT)
for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
png_write_sPLT(png_ptr, info_ptr->splt_palettes + i); png_write_sPLT(png_ptr, info_ptr->splt_palettes + i);
#endif /* sPLT */ #endif /* sPLT */
#if defined(PNG_WRITE_TEXT_SUPPORTED) #ifdef PNG_WRITE_TEXT_SUPPORTED
/* Check to see if we need to write text chunks */ /* Check to see if we need to write text chunks */
for (i = 0; i < info_ptr->num_text; i++) for (i = 0; i < info_ptr->num_text; i++)
{ {
@ -231,7 +233,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
/* An internationalized chunk? */ /* An internationalized chunk? */
if (info_ptr->text[i].compression > 0) if (info_ptr->text[i].compression > 0)
{ {
#if defined(PNG_WRITE_iTXt_SUPPORTED) #ifdef PNG_WRITE_iTXt_SUPPORTED
/* Write international chunk */ /* Write international chunk */
png_write_iTXt(png_ptr, png_write_iTXt(png_ptr,
info_ptr->text[i].compression, info_ptr->text[i].compression,
@ -248,7 +250,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
/* If we want a compressed text chunk */ /* If we want a compressed text chunk */
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt) 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 */ /* Write compressed chunk */
png_write_zTXt(png_ptr, info_ptr->text[i].key, png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0, info_ptr->text[i].text, 0,
@ -261,7 +263,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
} }
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) 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 */ /* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key, png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, info_ptr->text[i].text,
@ -276,7 +278,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
} }
#endif /* tEXt */ #endif /* tEXt */
#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
if (info_ptr->unknown_chunks_num) if (info_ptr->unknown_chunks_num)
{ {
png_unknown_chunk *up; png_unknown_chunk *up;
@ -287,7 +289,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
up++) 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 && if (keep != PNG_HANDLE_CHUNK_NEVER &&
up->location && (up->location & PNG_HAVE_PLTE) && up->location && (up->location & PNG_HAVE_PLTE) &&
!(up->location & PNG_HAVE_IDAT) && !(up->location & PNG_HAVE_IDAT) &&
@ -310,6 +312,7 @@ void PNGAPI
png_write_end(png_structp png_ptr, png_infop info_ptr) png_write_end(png_structp png_ptr, png_infop info_ptr)
{ {
png_debug(1, "in png_write_end"); png_debug(1, "in png_write_end");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
if (!(png_ptr->mode & PNG_HAVE_IDAT)) if (!(png_ptr->mode & PNG_HAVE_IDAT))
@ -318,16 +321,16 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
/* See if user wants us to write information chunks */ /* See if user wants us to write information chunks */
if (info_ptr != NULL) if (info_ptr != NULL)
{ {
#if defined(PNG_WRITE_TEXT_SUPPORTED) #ifdef PNG_WRITE_TEXT_SUPPORTED
int i; /* Local index variable */ int i; /* local index variable */
#endif #endif
#if defined(PNG_WRITE_tIME_SUPPORTED) #ifdef PNG_WRITE_tIME_SUPPORTED
/* Check to see if user has supplied a time chunk */ /* Check to see if user has supplied a time chunk */
if ((info_ptr->valid & PNG_INFO_tIME) && if ((info_ptr->valid & PNG_INFO_tIME) &&
!(png_ptr->mode & PNG_WROTE_tIME)) !(png_ptr->mode & PNG_WROTE_tIME))
png_write_tIME(png_ptr, &(info_ptr->mod_time)); png_write_tIME(png_ptr, &(info_ptr->mod_time));
#endif #endif
#if defined(PNG_WRITE_TEXT_SUPPORTED) #ifdef PNG_WRITE_TEXT_SUPPORTED
/* Loop through comment chunks */ /* Loop through comment chunks */
for (i = 0; i < info_ptr->num_text; i++) for (i = 0; i < info_ptr->num_text; i++)
{ {
@ -336,7 +339,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
/* An internationalized chunk? */ /* An internationalized chunk? */
if (info_ptr->text[i].compression > 0) if (info_ptr->text[i].compression > 0)
{ {
#if defined(PNG_WRITE_iTXt_SUPPORTED) #ifdef PNG_WRITE_iTXt_SUPPORTED
/* Write international chunk */ /* Write international chunk */
png_write_iTXt(png_ptr, png_write_iTXt(png_ptr,
info_ptr->text[i].compression, info_ptr->text[i].compression,
@ -352,7 +355,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
} }
else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt) 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 */ /* Write compressed chunk */
png_write_zTXt(png_ptr, info_ptr->text[i].key, png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0, info_ptr->text[i].text, 0,
@ -365,7 +368,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
} }
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) 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 */ /* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key, png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0); info_ptr->text[i].text, 0);
@ -378,7 +381,7 @@ png_write_end(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) if (info_ptr->unknown_chunks_num)
{ {
png_unknown_chunk *up; png_unknown_chunk *up;
@ -389,7 +392,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
up++) 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 && if (keep != PNG_HANDLE_CHUNK_NEVER &&
up->location && (up->location & PNG_AFTER_IDAT) && up->location && (up->location & PNG_AFTER_IDAT) &&
((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
@ -420,13 +423,14 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
#endif #endif
} }
#if defined(PNG_WRITE_tIME_SUPPORTED) #ifdef PNG_WRITE_tIME_SUPPORTED
#if !defined(_WIN32_WCE) #ifndef _WIN32_WCE
/* "time.h" functions are not supported on WindowsCE */ /* "time.h" functions are not supported on WindowsCE */
void PNGAPI void PNGAPI
png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime) png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime)
{ {
png_debug(1, "in png_convert_from_struct_tm"); png_debug(1, "in png_convert_from_struct_tm");
ptime->year = (png_uint_16)(1900 + ttime->tm_year); ptime->year = (png_uint_16)(1900 + ttime->tm_year);
ptime->month = (png_byte)(ttime->tm_mon + 1); ptime->month = (png_byte)(ttime->tm_mon + 1);
ptime->day = (png_byte)ttime->tm_mday; ptime->day = (png_byte)ttime->tm_mday;
@ -441,12 +445,14 @@ png_convert_from_time_t(png_timep ptime, time_t ttime)
struct tm *tbuf; struct tm *tbuf;
png_debug(1, "in png_convert_from_time_t"); png_debug(1, "in png_convert_from_time_t");
tbuf = gmtime(&ttime); tbuf = gmtime(&ttime);
png_convert_from_struct_tm(ptime, tbuf); png_convert_from_struct_tm(ptime, tbuf);
} }
#endif #endif
#endif #endif
/* Initialize png_ptr structure, and allocate any memory needed */ /* Initialize png_ptr structure, and allocate any memory needed */
png_structp PNGAPI png_structp PNGAPI
png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr, png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr,
@ -474,7 +480,9 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
#endif #endif
#endif #endif
int i; int i;
png_debug(1, "in png_create_write_struct"); png_debug(1, "in png_create_write_struct");
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
(png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr); (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
@ -486,8 +494,8 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
/* Added at libpng-1.2.6 */ /* Added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED #ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max=PNG_USER_WIDTH_MAX; png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX; png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
#endif #endif
#ifdef PNG_SETJMP_SUPPORTED #ifdef PNG_SETJMP_SUPPORTED
@ -498,8 +506,13 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
#endif #endif
{ {
png_free(png_ptr, png_ptr->zbuf); png_free(png_ptr, png_ptr->zbuf);
png_ptr->zbuf=NULL; png_ptr->zbuf = NULL;
png_destroy_struct(png_ptr); #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); return (NULL);
} }
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
@ -514,7 +527,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
if (user_png_ver) if (user_png_ver)
{ {
i=0; i = 0;
do do
{ {
if (user_png_ver[i] != png_libpng_ver[i]) if (user_png_ver[i] != png_libpng_ver[i])
@ -548,7 +561,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
png_warning(png_ptr, msg); png_warning(png_ptr, msg);
#endif #endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED #ifdef PNG_ERROR_NUMBERS_SUPPORTED
png_ptr->flags=0; png_ptr->flags = 0;
#endif #endif
png_error(png_ptr, png_error(png_ptr,
"Incompatible libpng version in application and library"); "Incompatible libpng version in application and library");
@ -563,15 +576,16 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL, png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
png_flush_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, png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
1, png_doublep_NULL, png_doublep_NULL); 1, png_doublep_NULL, png_doublep_NULL);
#endif #endif
#ifdef PNG_SETJMP_SUPPORTED #ifdef PNG_SETJMP_SUPPORTED
/* Applications that neglect to set up their own setjmp() and then encounter /* Applications that neglect to set up their own setjmp() and then
a png_error() will longjmp here. Since the jmpbuf is then meaningless we * encounter a png_error() will longjmp here. Since the jmpbuf is
abort instead of returning. */ * then meaningless we abort instead of returning.
*/
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
if (setjmp(jmpbuf)) if (setjmp(jmpbuf))
PNG_ABORT(); PNG_ABORT();
@ -606,7 +620,7 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
png_sizeof(png_info) > png_info_size) png_sizeof(png_info) > png_info_size)
{ {
char msg[80]; char msg[80];
png_ptr->warning_fn=NULL; png_ptr->warning_fn = NULL;
if (user_png_ver) if (user_png_ver)
{ {
png_snprintf(msg, 80, png_snprintf(msg, 80,
@ -622,18 +636,18 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
#endif #endif
if (png_sizeof(png_struct) > png_struct_size) if (png_sizeof(png_struct) > png_struct_size)
{ {
png_ptr->error_fn=NULL; png_ptr->error_fn = NULL;
#ifdef PNG_ERROR_NUMBERS_SUPPORTED #ifdef PNG_ERROR_NUMBERS_SUPPORTED
png_ptr->flags=0; png_ptr->flags = 0;
#endif #endif
png_error(png_ptr, png_error(png_ptr,
"The png struct allocated by the application for writing is too small."); "The png struct allocated by the application for writing is too small.");
} }
if (png_sizeof(png_info) > png_info_size) if (png_sizeof(png_info) > png_info_size)
{ {
png_ptr->error_fn=NULL; png_ptr->error_fn = NULL;
#ifdef PNG_ERROR_NUMBERS_SUPPORTED #ifdef PNG_ERROR_NUMBERS_SUPPORTED
png_ptr->flags=0; png_ptr->flags = 0;
#endif #endif
png_error(png_ptr, png_error(png_ptr,
"The info struct allocated by the application for writing is too small."); "The info struct allocated by the application for writing is too small.");
@ -647,9 +661,9 @@ void PNGAPI
png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver, png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_size_t png_struct_size) png_size_t png_struct_size)
{ {
png_structp png_ptr=*ptr_ptr; png_structp png_ptr = *ptr_ptr;
#ifdef PNG_SETJMP_SUPPORTED #ifdef PNG_SETJMP_SUPPORTED
jmp_buf tmp_jmp; /* To save current jump buffer */ jmp_buf tmp_jmp; /* to save current jump buffer */
#endif #endif
int i = 0; int i = 0;
@ -664,10 +678,9 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
#ifdef PNG_LEGACY_SUPPORTED #ifdef PNG_LEGACY_SUPPORTED
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
#else #else
png_ptr->warning_fn=NULL; png_ptr->warning_fn = NULL;
png_warning(png_ptr, png_warning(png_ptr,
"Application uses deprecated png_write_init() and should be recompiled."); "Application uses deprecated png_write_init() and should be recompiled.");
break;
#endif #endif
} }
} while (png_libpng_ver[i++]); } while (png_libpng_ver[i++]);
@ -691,8 +704,8 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
/* Added at libpng-1.2.6 */ /* Added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED #ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max=PNG_USER_WIDTH_MAX; png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX; png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
#endif #endif
#ifdef PNG_SETJMP_SUPPORTED #ifdef PNG_SETJMP_SUPPORTED
@ -707,8 +720,7 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_ptr->zbuf_size = PNG_ZBUF_SIZE; png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size); (png_uint_32)png_ptr->zbuf_size);
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT, png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
1, png_doublep_NULL, png_doublep_NULL); 1, png_doublep_NULL, png_doublep_NULL);
#endif #endif
@ -723,8 +735,8 @@ void PNGAPI
png_write_rows(png_structp png_ptr, png_bytepp row, png_write_rows(png_structp png_ptr, png_bytepp row,
png_uint_32 num_rows) png_uint_32 num_rows)
{ {
png_uint_32 i; /* Row counter */ png_uint_32 i; /* row counter */
png_bytepp rp; /* Row pointer */ png_bytepp rp; /* row pointer */
png_debug(1, "in png_write_rows"); png_debug(1, "in png_write_rows");
@ -744,15 +756,16 @@ png_write_rows(png_structp png_ptr, png_bytepp row,
void PNGAPI void PNGAPI
png_write_image(png_structp png_ptr, png_bytepp image) png_write_image(png_structp png_ptr, png_bytepp image)
{ {
png_uint_32 i; /* Row index */ png_uint_32 i; /* row index */
int pass, num_pass; /* Pass variables */ int pass, num_pass; /* pass variables */
png_bytepp rp; /* Points to current row */ png_bytepp rp; /* points to current row */
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
png_debug(1, "in png_write_image"); 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, /* Initialize interlace handling. If image is not interlaced,
* this will set pass to 1 * this will set pass to 1
*/ */
@ -777,6 +790,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
{ {
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
png_debug2(1, "in png_write_row (row %ld, pass %d)", png_debug2(1, "in png_write_row (row %ld, pass %d)",
png_ptr->row_number, png_ptr->pass); png_ptr->row_number, png_ptr->pass);
@ -821,7 +835,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
png_write_start_row(png_ptr); 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 interlaced and not interested in row, return */
if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
{ {
@ -902,7 +916,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
png_memcpy_check(png_ptr, png_ptr->row_buf + 1, row, png_memcpy_check(png_ptr, png_ptr->row_buf + 1, row,
png_ptr->row_info.rowbytes); png_ptr->row_info.rowbytes);
#if defined(PNG_WRITE_INTERLACING_SUPPORTED) #ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Handle interlacing */ /* Handle interlacing */
if (png_ptr->interlaced && png_ptr->pass < 6 && if (png_ptr->interlaced && png_ptr->pass < 6 &&
(png_ptr->transformations & PNG_INTERLACE)) (png_ptr->transformations & PNG_INTERLACE))
@ -922,7 +936,7 @@ png_write_row(png_structp png_ptr, png_bytep row)
if (png_ptr->transformations) if (png_ptr->transformations)
png_do_write_transformations(png_ptr); 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 /* Write filter_method 64 (intrapixel differencing) only if
* 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
* 2. Libpng did not write a PNG signature (this filter_method is only * 2. Libpng did not write a PNG signature (this filter_method is only
@ -947,12 +961,13 @@ png_write_row(png_structp png_ptr, png_bytep row)
(*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); (*(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 */ /* Set the automatic flush interval or 0 to turn flushing off */
void PNGAPI void PNGAPI
png_set_flush(png_structp png_ptr, int nrows) png_set_flush(png_structp png_ptr, int nrows)
{ {
png_debug(1, "in png_set_flush"); png_debug(1, "in png_set_flush");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
png_ptr->flush_dist = (nrows < 0 ? 0 : nrows); png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
@ -965,6 +980,7 @@ png_write_flush(png_structp png_ptr)
int wrote_IDAT; int wrote_IDAT;
png_debug(1, "in png_write_flush"); png_debug(1, "in png_write_flush");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
/* We have already written out all of the data */ /* We have already written out all of the data */
@ -1025,6 +1041,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
#endif #endif
png_debug(1, "in png_destroy_write_struct"); png_debug(1, "in png_destroy_write_struct");
if (png_ptr_ptr != NULL) if (png_ptr_ptr != NULL)
{ {
png_ptr = *png_ptr_ptr; png_ptr = *png_ptr_ptr;
@ -1051,11 +1068,11 @@ 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); png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
if (png_ptr->num_chunk_list) if (png_ptr->num_chunk_list)
{ {
png_free(png_ptr, png_ptr->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; png_ptr->num_chunk_list = 0;
} }
#endif #endif
@ -1099,6 +1116,7 @@ png_write_destroy(png_structp png_ptr)
#endif #endif
png_debug(1, "in png_write_destroy"); png_debug(1, "in png_write_destroy");
/* Free any memory zlib uses */ /* Free any memory zlib uses */
deflateEnd(&png_ptr->zstream); deflateEnd(&png_ptr->zstream);
@ -1113,11 +1131,11 @@ png_write_destroy(png_structp png_ptr)
png_free(png_ptr, png_ptr->paeth_row); png_free(png_ptr, png_ptr->paeth_row);
#endif #endif
#if defined(PNG_TIME_RFC1123_SUPPORTED) #ifdef PNG_TIME_RFC1123_SUPPORTED
png_free(png_ptr, png_ptr->time_buffer); png_free(png_ptr, png_ptr->time_buffer);
#endif #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->prev_filters);
png_free(png_ptr, png_ptr->filter_weights); png_free(png_ptr, png_ptr->filter_weights);
png_free(png_ptr, png_ptr->inv_filter_weights); png_free(png_ptr, png_ptr->inv_filter_weights);
@ -1156,9 +1174,10 @@ void PNGAPI
png_set_filter(png_structp png_ptr, int method, int filters) png_set_filter(png_structp png_ptr, int method, int filters)
{ {
png_debug(1, "in png_set_filter"); png_debug(1, "in png_set_filter");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
#if defined(PNG_MNG_FEATURES_SUPPORTED) #ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
(method == PNG_INTRAPIXEL_DIFFERENCING)) (method == PNG_INTRAPIXEL_DIFFERENCING))
method = PNG_FILTER_TYPE_BASE; method = PNG_FILTER_TYPE_BASE;
@ -1171,22 +1190,22 @@ png_set_filter(png_structp png_ptr, int method, int filters)
case 5: case 5:
case 6: case 6:
case 7: png_warning(png_ptr, "Unknown row filter for method 0"); 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: case PNG_FILTER_VALUE_NONE:
png_ptr->do_filter=PNG_FILTER_NONE; break; png_ptr->do_filter = PNG_FILTER_NONE; break;
#ifndef PNG_NO_WRITE_FILTER #ifndef PNG_NO_WRITE_FILTER
case PNG_FILTER_VALUE_SUB: 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: 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: 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: 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; default: png_ptr->do_filter = (png_byte)filters; break;
#else #else
default: png_warning(png_ptr, "Unknown row filter for method 0"); 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 /* If we have allocated the row_buf, this means we have already started
@ -1255,7 +1274,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
} }
if (png_ptr->do_filter == PNG_NO_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; png_ptr->do_filter = PNG_FILTER_NONE;
} }
} }
@ -1270,7 +1289,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
* filtered data going to zlib more consistent, hopefully resulting in * filtered data going to zlib more consistent, hopefully resulting in
* better compression. * better compression.
*/ */
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* GRR 970116 */ #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */
void PNGAPI void PNGAPI
png_set_filter_heuristics(png_structp png_ptr, int heuristic_method, png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
int num_weights, png_doublep filter_weights, int num_weights, png_doublep filter_weights,
@ -1279,6 +1298,7 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
int i; int i;
png_debug(1, "in png_set_filter_heuristics"); png_debug(1, "in png_set_filter_heuristics");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST) if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST)
@ -1393,6 +1413,7 @@ void PNGAPI
png_set_compression_level(png_structp png_ptr, int level) png_set_compression_level(png_structp png_ptr, int level)
{ {
png_debug(1, "in png_set_compression_level"); png_debug(1, "in png_set_compression_level");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL; png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL;
@ -1403,6 +1424,7 @@ void PNGAPI
png_set_compression_mem_level(png_structp png_ptr, int mem_level) png_set_compression_mem_level(png_structp png_ptr, int mem_level)
{ {
png_debug(1, "in png_set_compression_mem_level"); png_debug(1, "in png_set_compression_mem_level");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL; png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL;
@ -1413,6 +1435,7 @@ void PNGAPI
png_set_compression_strategy(png_structp png_ptr, int strategy) png_set_compression_strategy(png_structp png_ptr, int strategy)
{ {
png_debug(1, "in png_set_compression_strategy"); png_debug(1, "in png_set_compression_strategy");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY; png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
@ -1433,7 +1456,7 @@ png_set_compression_window_bits(png_structp png_ptr, int window_bits)
if (window_bits == 8) if (window_bits == 8)
{ {
png_warning(png_ptr, "Compression window is being reset to 512"); png_warning(png_ptr, "Compression window is being reset to 512");
window_bits=9; window_bits = 9;
} }
#endif #endif
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS; png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS;
@ -1444,6 +1467,7 @@ void PNGAPI
png_set_compression_method(png_structp png_ptr, int method) png_set_compression_method(png_structp png_ptr, int method)
{ {
png_debug(1, "in png_set_compression_method"); png_debug(1, "in png_set_compression_method");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
if (method != 8) if (method != 8)
@ -1460,12 +1484,13 @@ png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)
png_ptr->write_row_fn = write_row_fn; png_ptr->write_row_fn = write_row_fn;
} }
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
void PNGAPI void PNGAPI
png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
write_user_transform_fn) write_user_transform_fn)
{ {
png_debug(1, "in png_set_write_user_transform_fn"); png_debug(1, "in png_set_write_user_transform_fn");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
png_ptr->transformations |= PNG_USER_TRANSFORM; png_ptr->transformations |= PNG_USER_TRANSFORM;
@ -1474,14 +1499,14 @@ png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
#endif #endif
#if defined(PNG_INFO_IMAGE_SUPPORTED) #ifdef PNG_INFO_IMAGE_SUPPORTED
void PNGAPI void PNGAPI
png_write_png(png_structp png_ptr, png_infop info_ptr, png_write_png(png_structp png_ptr, png_infop info_ptr,
int transforms, voidp params) int transforms, voidp params)
{ {
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
/* Invert the alpha channel from opacity to transparency */ /* Invert the alpha channel from opacity to transparency */
if (transforms & PNG_TRANSFORM_INVERT_ALPHA) if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
png_set_invert_alpha(png_ptr); png_set_invert_alpha(png_ptr);
@ -1492,13 +1517,13 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
/* ------ these transformations don't touch the info structure ------- */ /* ------ these transformations don't touch the info structure ------- */
#if defined(PNG_WRITE_INVERT_SUPPORTED) #ifdef PNG_WRITE_INVERT_SUPPORTED
/* Invert monochrome pixels */ /* Invert monochrome pixels */
if (transforms & PNG_TRANSFORM_INVERT_MONO) if (transforms & PNG_TRANSFORM_INVERT_MONO)
png_set_invert_mono(png_ptr); png_set_invert_mono(png_ptr);
#endif #endif
#if defined(PNG_WRITE_SHIFT_SUPPORTED) #ifdef PNG_WRITE_SHIFT_SUPPORTED
/* Shift the pixels up to a legal bit depth and fill in /* Shift the pixels up to a legal bit depth and fill in
* as appropriate to correctly scale the image. * as appropriate to correctly scale the image.
*/ */
@ -1507,19 +1532,19 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
png_set_shift(png_ptr, &info_ptr->sig_bit); png_set_shift(png_ptr, &info_ptr->sig_bit);
#endif #endif
#if defined(PNG_WRITE_PACK_SUPPORTED) #ifdef PNG_WRITE_PACK_SUPPORTED
/* Pack pixels into bytes */ /* Pack pixels into bytes */
if (transforms & PNG_TRANSFORM_PACKING) if (transforms & PNG_TRANSFORM_PACKING)
png_set_packing(png_ptr); png_set_packing(png_ptr);
#endif #endif
#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
/* Swap location of alpha bytes from ARGB to RGBA */ /* Swap location of alpha bytes from ARGB to RGBA */
if (transforms & PNG_TRANSFORM_SWAP_ALPHA) if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
png_set_swap_alpha(png_ptr); png_set_swap_alpha(png_ptr);
#endif #endif
#if defined(PNG_WRITE_FILLER_SUPPORTED) #ifdef PNG_WRITE_FILLER_SUPPORTED
/* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */ /* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */
if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER) if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
png_set_filler(png_ptr, 0, PNG_FILLER_AFTER); png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
@ -1527,19 +1552,19 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
#endif #endif
#if defined(PNG_WRITE_BGR_SUPPORTED) #ifdef PNG_WRITE_BGR_SUPPORTED
/* Flip BGR pixels to RGB */ /* Flip BGR pixels to RGB */
if (transforms & PNG_TRANSFORM_BGR) if (transforms & PNG_TRANSFORM_BGR)
png_set_bgr(png_ptr); png_set_bgr(png_ptr);
#endif #endif
#if defined(PNG_WRITE_SWAP_SUPPORTED) #ifdef PNG_WRITE_SWAP_SUPPORTED
/* Swap bytes of 16-bit files to most significant byte first */ /* Swap bytes of 16-bit files to most significant byte first */
if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
png_set_swap(png_ptr); png_set_swap(png_ptr);
#endif #endif
#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) #ifdef PNG_WRITE_PACKSWAP_SUPPORTED
/* Swap bits of 1, 2, 4 bit packed pixel formats */ /* Swap bits of 1, 2, 4 bit packed pixel formats */
if (transforms & PNG_TRANSFORM_PACKSWAP) if (transforms & PNG_TRANSFORM_PACKSWAP)
png_set_packswap(png_ptr); png_set_packswap(png_ptr);