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Imported from libpng-1.0.1a.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-04-21 15:03:57 -05:00
parent f9f2fe0ce7
commit 896239be20
35 changed files with 1412 additions and 769 deletions
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81
pngwtran.c
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@@ -1,12 +1,12 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
* libpng 1.0.1
* libpng 1.0.1a
* 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
* March 15, 1998
* April 21, 1998
*/
#define PNG_INTERNAL
@@ -96,13 +96,15 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
{
png_bytep sp, dp;
int mask, v;
png_uint_32 i;
png_uint_32 i, istop;
sp = row;
dp = row;
mask = 0x80;
v = 0;
for (i = 0; i < row_info->width; i++)
istop = row_info->width;
for (i = 0; i < istop; i++)
{
if (*sp != 0)
v |= mask;
@@ -125,13 +127,14 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
{
png_bytep sp, dp;
int shift, v;
png_uint_32 i;
png_uint_32 i, istop;
sp = row;
dp = row;
shift = 6;
v = 0;
for (i = 0; i < row_info->width; i++)
istop = row_info->width;
for (i = 0; i < istop; i++)
{
png_byte value;
@@ -156,13 +159,14 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
{
png_bytep sp, dp;
int shift, v;
png_uint_32 i;
png_uint_32 i, istop;
sp = row;
dp = row;
shift = 4;
v = 0;
for (i = 0; i < row_info->width; i++)
istop = row_info->width;
for (i = 0; i < istop; i++)
{
png_byte value;
@@ -246,7 +250,7 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
if (row_info->bit_depth < 8)
{
png_bytep bp;
png_uint_32 i;
png_uint_32 i, istop;
png_byte mask;
if (bit_depth->gray == 1 && row_info->bit_depth == 2)
@@ -256,7 +260,8 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
else
mask = 0xff;
for (bp = row, i = 0; i < row_info->rowbytes; i++, bp++)
istop = row_info->rowbytes;
for (bp = row, i = 0; i < istop; i++, bp++)
{
png_uint_16 v;
int j;
@@ -275,9 +280,10 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
else if (row_info->bit_depth == 8)
{
png_bytep bp;
png_uint_32 i;
png_uint_32 i, istop;
for (bp = row, i = 0; i < row_info->width; i++)
istop = row_info->width;
for (bp = row, i = 0; i < istop; i++)
{
png_uint_32 c;
@@ -301,9 +307,10 @@ png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
else
{
png_bytep bp;
png_uint_32 i;
png_uint_32 i, istop;
for (bp = row, i = 0; i < row_info->width * row_info->channels; i++)
istop = row_info->width;
for (bp = row, i = 0; i < istop; i++)
{
png_uint_32 c;
@@ -345,12 +352,12 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
if (row_info->bit_depth == 8)
{
png_bytep sp, dp;
png_byte save;
png_uint_32 i;
png_uint_32 i, istop;
for (i = 0, sp = dp = row; i < row_info->width; i++)
istop = row_info->width;
for (i = 0, sp = dp = row; i < istop; i++)
{
save = *(sp++);
png_byte save = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
@@ -361,11 +368,12 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
else
{
png_bytep sp, dp;
png_byte save[2];
png_uint_32 i;
png_uint_32 i, istop;
for (i = 0, sp = dp = row; i < row_info->width; i++)
istop = row_info->width;
for (i = 0, sp = dp = row; i < istop; i++)
{
png_byte save[2];
save[0] = *(sp++);
save[1] = *(sp++);
*(dp++) = *(sp++);
@@ -385,12 +393,12 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
if (row_info->bit_depth == 8)
{
png_bytep sp, dp;
png_byte save;
png_uint_32 i;
for (i = 0, sp = dp = row; i < row_info->width; i++)
istop = row_info->width;
for (i = 0, sp = dp = row; i < istop; i++)
{
save = *(sp++);
png_byte save = *(sp++);
*(dp++) = *(sp++);
*(dp++) = save;
}
@@ -399,11 +407,12 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
else
{
png_bytep sp, dp;
png_byte save[2];
png_uint_32 i;
for (i = 0, sp = dp = row; i < row_info->width; i++)
istop = row_info->width;
for (i = 0, sp = dp = row; i < istop; i++)
{
png_byte save[2];
save[0] = *(sp++);
save[1] = *(sp++);
*(dp++) = *(sp++);
@@ -432,9 +441,10 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
if (row_info->bit_depth == 8)
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 i, istop;
for (i = 0, sp = dp = row; i < row_info->width; i++)
istop = row_info->width;
for (i = 0, sp = dp = row; i < istop; i++)
{
*(dp++) = *(sp++);
*(dp++) = *(sp++);
@@ -446,9 +456,10 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
else
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 i, istop;
for (i = 0, sp = dp = row; i < row_info->width; i++)
istop = row_info->width;
for (i = 0, sp = dp = row; i < istop; i++)
{
*(dp++) = *(sp++);
*(dp++) = *(sp++);
@@ -467,9 +478,10 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
if (row_info->bit_depth == 8)
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 i, istop;
for (i = 0, sp = dp = row; i < row_info->width; i++)
istop = row_info->width;
for (i = 0, sp = dp = row; i < istop; i++)
{
*(dp++) = *(sp++);
*(dp++) = 255 - *(sp++);
@@ -479,9 +491,10 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
else
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 i, istop;
for (i = 0, sp = dp = row; i < row_info->width; i++)
istop = row_info->width;
for (i = 0, sp = dp = row; i < istop; i++)
{
*(dp++) = *(sp++);
*(dp++) = *(sp++);