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[libpng10] Imported from libpng-1.0.19rc1.tar

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This commit is contained in:
Glenn Randers-Pehrson
2006-06-13 07:58:30 -05:00
parent b6c4193528
commit db576fa76b
114 changed files with 48382 additions and 5642 deletions
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71
pngwrite.c
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@@ -1,9 +1,9 @@
/* pngwrite.c - general routines to write a PNG file
*
* libpng 1.0.18 - December 3, 2004
* Last changed in libpng 1.2.9 April 14, 2006
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* Copyright (c) 1998-2006 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.)
*/
@@ -26,13 +26,15 @@ void PNGAPI
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
@@ -128,13 +130,16 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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)
@@ -183,7 +188,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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
@@ -222,7 +227,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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;
@@ -236,7 +241,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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;
@@ -249,7 +254,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
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;
@@ -290,6 +295,8 @@ void PNGAPI
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");
@@ -323,7 +330,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
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;
@@ -336,7 +343,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
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;
@@ -348,7 +355,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
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 */
@@ -554,6 +561,8 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
}
/* 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)
@@ -604,6 +613,7 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
}
png_write_init_3(&png_ptr, user_png_ver, png_struct_size);
}
#endif /* PNG_1_0_X || PNG_1_2_X */
void PNGAPI
@@ -614,7 +624,12 @@ png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
#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])
@@ -691,6 +706,10 @@ png_write_rows(png_structp png_ptr, png_bytepp row,
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++)
{
@@ -708,6 +727,9 @@ png_write_image(png_structp png_ptr, png_bytepp image)
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,
@@ -731,8 +753,11 @@ png_write_image(png_structp png_ptr, png_bytepp image)
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)
{
@@ -906,6 +931,8 @@ void PNGAPI
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);
}
@@ -916,6 +943,8 @@ png_write_flush(png_structp png_ptr)
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;
@@ -1092,6 +1121,8 @@ void PNGAPI
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))
@@ -1200,6 +1231,8 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
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");
@@ -1312,6 +1345,8 @@ void PNGAPI
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;
}
@@ -1320,6 +1355,8 @@ void PNGAPI
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;
}
@@ -1328,6 +1365,8 @@ void PNGAPI
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;
}
@@ -1335,6 +1374,8 @@ png_set_compression_strategy(png_structp png_ptr, int 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)
@@ -1355,6 +1396,8 @@ void PNGAPI
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;
@@ -1364,6 +1407,8 @@ png_set_compression_method(png_structp png_ptr, int 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;
}
@@ -1373,6 +1418,8 @@ 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\n");
if (png_ptr == NULL)
return;
png_ptr->transformations |= PNG_USER_TRANSFORM;
png_ptr->write_user_transform_fn = write_user_transform_fn;
}
@@ -1384,6 +1431,8 @@ 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)