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Imported from libpng-0.98.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-01-16 22:06:18 -06:00
parent 2687fcc7b5
commit c4a2ae6cac
26 changed files with 687 additions and 240 deletions
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44
pngwrite.c
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@@ -1,12 +1,12 @@
/* pngwrite.c - general routines to write a PNG file
*
* libpng 0.97
* libpng 0.98
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* January 7, 1998
* January 16, 1998
*/
/* get internal access to png.h */
@@ -43,7 +43,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
#endif
#if defined(PNG_WRITE_sRGB_SUPPORTED)
if (info_ptr->valid & PNG_INFO_sRGB)
png_write_sRGB(png_ptr, info_ptr->srgb_intent);
png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
#endif
#if defined(PNG_WRITE_sBIT_SUPPORTED)
if (info_ptr->valid & PNG_INFO_sBIT)
@@ -62,10 +62,23 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
(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");
#if defined(PNG_WRITE_tRNS_SUPPORTED)
if (info_ptr->valid & PNG_INFO_tRNS)
{
#if defined(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 i;
for (i=0; i<info_ptr->num_trans; i++)
info_ptr->trans[i] = 255 - info_ptr->trans[i];
}
#endif
png_write_tRNS(png_ptr, info_ptr->trans, &(info_ptr->trans_values),
info_ptr->num_trans, info_ptr->color_type);
}
#endif
#if defined(PNG_WRITE_bKGD_SUPPORTED)
if (info_ptr->valid & PNG_INFO_bKGD)
@@ -200,12 +213,12 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
png_write_IEND(png_ptr);
}
#if defined(PNG_TIME_RFC1152_SUPPORTED)
/* Convert the supplied time into an RFC 1152 string suitable for use in
#if defined(PNG_TIME_RFC1123_SUPPORTED)
/* Convert the supplied time into an RFC 1123 string suitable for use in
* a "Creation Time" or other text-based time string.
*/
png_charp
png_convert_to_rfc1152(png_structp png_ptr, png_timep ptime)
png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
{
const char *short_months[12] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
@@ -233,7 +246,7 @@ png_convert_to_rfc1152(png_structp png_ptr, png_timep ptime)
#endif
return png_ptr->time_buffer;
}
#endif /* PNG_TIME_RFC1152_SUPPORTED */
#endif /* PNG_TIME_RFC1123_SUPPORTED */
#if defined(PNG_WRITE_tIME_SUPPORTED)
void
@@ -582,6 +595,19 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
{
#ifdef PNG_WRITE_tEXt_SUPPORTED
png_free(png_ptr, info_ptr->text);
#endif
#if defined(PNG_READ_pCAL_SUPPORTED)
png_free(png_ptr, info_ptr->pcal_purpose);
png_free(png_ptr, info_ptr->pcal_units);
if (info_ptr->pcal_params != NULL)
{
int i;
for (i = 0; i < info_ptr->pcal_nparams; i++)
{
png_free(png_ptr, info_ptr->pcal_params[i]);
}
png_free(png_ptr, info_ptr->pcal_params);
}
#endif
png_destroy_struct((png_voidp)info_ptr);
*info_ptr_ptr = (png_infop)NULL;
@@ -617,9 +643,9 @@ png_write_destroy(png_structp png_ptr)
png_free(png_ptr, png_ptr->up_row);
png_free(png_ptr, png_ptr->avg_row);
png_free(png_ptr, png_ptr->paeth_row);
#if defined(PNG_TIME_RFC1152_SUPPORTED)
#if defined(PNG_TIME_RFC1123_SUPPORTED)
png_free(png_ptr, png_ptr->time_buffer);
#endif /* PNG_TIME_RFC1152_SUPPORTED */
#endif /* PNG_TIME_RFC1123_SUPPORTED */
#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
png_free(png_ptr, png_ptr->prev_filters);
png_free(png_ptr, png_ptr->filter_weights);