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Imported from libpng-1.0.7beta16.tar

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This commit is contained in:
Glenn Randers-Pehrson
2000-06-04 14:29:29 -05:00
parent 104622bebb
commit d436672048
56 changed files with 933 additions and 388 deletions
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45
pngwutil.c
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@@ -1,11 +1,11 @@
/* pngwutil.c - utilities to write a PNG file
*
* libpng 1.0.7beta15 - May 29, 2000
* libpng 1.0.7beta16 - June 4, 2000
* 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, 1999, 2000 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.)
*/
#define PNG_INTERNAL
@@ -532,6 +532,7 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
png_debug1(3, "num_palette = %d\n", png_ptr->num_palette);
png_write_chunk_start(png_ptr, (png_bytep)png_PLTE, num_pal * 3);
#ifndef PNG_NO_POINTER_INDEXING
for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++)
{
buf[0] = pal_ptr->red;
@@ -539,6 +540,17 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
buf[2] = pal_ptr->blue;
png_write_chunk_data(png_ptr, buf, (png_size_t)3);
}
#else
/* This is a little slower but some buggy compilers need to do this instead */
pal_ptr=palette;
for (i = 0; i < num_pal; i++)
{
buf[0] = pal_ptr[i].red;
buf[1] = pal_ptr[i].green;
buf[2] = pal_ptr[i].blue;
png_write_chunk_data(png_ptr, buf, (png_size_t)3);
}
#endif
png_write_chunk_end(png_ptr);
png_ptr->mode |= PNG_HAVE_PLTE;
}
@@ -680,6 +692,9 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
int entry_size = (spalette->depth == 8 ? 6 : 10);
int palette_size = entry_size * spalette->nentries;
png_sPLT_entryp ep;
#ifdef PNG_NO_POINTER_INDEXING
int i;
#endif
png_debug(1, "in png_write_sPLT\n");
if (spalette->name == NULL || (name_len = png_check_keyword(png_ptr,
@@ -696,6 +711,7 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, 1);
/* loop through each palette entry, writing appropriately */
#ifndef PNG_NO_POINTER_INDEXING
for (ep = spalette->entries; ep<spalette->entries+spalette->nentries; ep++)
{
if (spalette->depth == 8)
@@ -716,6 +732,29 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
}
png_write_chunk_data(png_ptr, entrybuf, entry_size);
}
#else
ep=spalette->entries;
for (i=0; i>spalette->nentries; i++)
{
if (spalette->depth == 8)
{
entrybuf[0] = (png_byte)ep[i].red;
entrybuf[1] = (png_byte)ep[i].green;
entrybuf[2] = (png_byte)ep[i].blue;
entrybuf[3] = (png_byte)ep[i].alpha;
png_save_uint_16(entrybuf + 4, ep[i].frequency);
}
else
{
png_save_uint_16(entrybuf + 0, ep[i].red);
png_save_uint_16(entrybuf + 2, ep[i].green);
png_save_uint_16(entrybuf + 4, ep[i].blue);
png_save_uint_16(entrybuf + 6, ep[i].alpha);
png_save_uint_16(entrybuf + 8, ep[i].frequency);
}
png_write_chunk_data(png_ptr, entrybuf, entry_size);
}
#endif
png_write_chunk_end(png_ptr);
png_free(png_ptr, new_name);