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Imported from pngcrush-1.3.1.tar

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This commit is contained in:
Glenn Randers-Pehrson
1999-12-27 03:10:07 -06:00
parent 7a16d67a4b
commit e7cba14aff
23 changed files with 616 additions and 401 deletions
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82
pngrtran.c
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@@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* libpng 1.0.5j - December 21, 1999
* libpng 1.0.5k - December 27, 1999
* 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
@@ -367,7 +367,7 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
{
int j, next_j;
if (num_new_palette & 1)
if (num_new_palette & 0x01)
{
j = p->left;
next_j = p->right;
@@ -897,8 +897,8 @@ png_init_read_transformations(png_structp png_ptr)
#endif
#if defined(PNG_READ_BACKGROUND_SUPPORTED)
/* No GAMMA transformation */
if (png_ptr->transformations & PNG_BACKGROUND &&
color_type == PNG_COLOR_TYPE_PALETTE)
if ((png_ptr->transformations & PNG_BACKGROUND) &&
(color_type == PNG_COLOR_TYPE_PALETTE))
{
int i;
int istop = (int)png_ptr->num_trans;
@@ -931,7 +931,7 @@ png_init_read_transformations(png_structp png_ptr)
#if defined(PNG_READ_SHIFT_SUPPORTED)
if ((png_ptr->transformations & PNG_SHIFT) &&
color_type == PNG_COLOR_TYPE_PALETTE)
(color_type == PNG_COLOR_TYPE_PALETTE))
{
png_uint_16 i;
png_uint_16 istop = png_ptr->num_palette;
@@ -1009,7 +1009,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
#endif
#if defined(PNG_READ_16_TO_8_SUPPORTED)
if ((png_ptr->transformations & PNG_16_TO_8) && info_ptr->bit_depth == 16)
if ((png_ptr->transformations & PNG_16_TO_8) && (info_ptr->bit_depth == 16))
info_ptr->bit_depth = 8;
#endif
@@ -1026,7 +1026,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
#endif
#if defined(PNG_READ_PACK_SUPPORTED)
if ((png_ptr->transformations & PNG_PACK) && info_ptr->bit_depth < 8)
if ((png_ptr->transformations & PNG_PACK) && (info_ptr->bit_depth < 8))
info_ptr->bit_depth = 8;
#endif
@@ -1057,9 +1057,9 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
#if defined(PNG_READ_FILLER_SUPPORTED)
/* STRIP_ALPHA and FILLER allowed: MASK_ALPHA bit stripped above */
if (png_ptr->transformations & PNG_FILLER &&
(info_ptr->color_type == PNG_COLOR_TYPE_RGB ||
info_ptr->color_type == PNG_COLOR_TYPE_GRAY))
if ((png_ptr->transformations & PNG_FILLER) &&
((info_ptr->color_type == PNG_COLOR_TYPE_RGB) ||
(info_ptr->color_type == PNG_COLOR_TYPE_GRAY)))
info_ptr->channels++;
#endif
@@ -1177,7 +1177,7 @@ From Andreas Dilger e-mail to png-implement, 26 March 1998:
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
/* if gray -> RGB, do so now only if background is non-gray; else do later
* for performance reasons */
if (png_ptr->transformations & PNG_GRAY_TO_RGB &&
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
!(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
@@ -1251,8 +1251,8 @@ From Andreas Dilger e-mail to png-implement, 26 March 1998:
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
/* if gray -> RGB, do so now only if we did not do so above */
if (png_ptr->transformations & PNG_GRAY_TO_RGB &&
png_ptr->mode & PNG_BACKGROUND_IS_GRAY)
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
@@ -1330,10 +1330,10 @@ png_do_unpack(png_row_infop row_info, png_bytep row)
{
png_bytep sp = row + (png_size_t)((row_width - 1) >> 3);
png_bytep dp = row + (png_size_t)row_width - 1;
png_uint_32 shift = 7 - (int)((row_width + 7) & 7);
png_uint_32 shift = 7 - (int)((row_width + 7) & 0x07);
for (i = 0; i < row_width; i++)
{
*dp = (png_byte)((*sp >> shift) & 0x1);
*dp = (png_byte)((*sp >> shift) & 0x01);
if (shift == 7)
{
shift = 0;
@@ -1351,10 +1351,10 @@ png_do_unpack(png_row_infop row_info, png_bytep row)
png_bytep sp = row + (png_size_t)((row_width - 1) >> 2);
png_bytep dp = row + (png_size_t)row_width - 1;
png_uint_32 shift = (int)((3 - ((row_width + 3) & 3)) << 1);
png_uint_32 shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
for (i = 0; i < row_width; i++)
{
*dp = (png_byte)((*sp >> shift) & 0x3);
*dp = (png_byte)((*sp >> shift) & 0x03);
if (shift == 6)
{
shift = 0;
@@ -1371,10 +1371,10 @@ png_do_unpack(png_row_infop row_info, png_bytep row)
{
png_bytep sp = row + (png_size_t)((row_width - 1) >> 1);
png_bytep dp = row + (png_size_t)row_width - 1;
png_uint_32 shift = (int)((1 - ((row_width + 1) & 1)) << 2);
png_uint_32 shift = (int)((1 - ((row_width + 1) & 0x01)) << 2);
for (i = 0; i < row_width; i++)
{
*dp = (png_byte)((*sp >> shift) & 0xf);
*dp = (png_byte)((*sp >> shift) & 0x0f);
if (shift == 4)
{
shift = 0;
@@ -2518,7 +2518,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
shift = 7;
for (i = 0; i < row_width; i++)
{
if ((png_uint_16)((*sp >> shift) & 0x1)
if ((png_uint_16)((*sp >> shift) & 0x01)
== trans_values->gray)
{
*sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
@@ -2543,7 +2543,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
shift = 6;
for (i = 0; i < row_width; i++)
{
if ((png_uint_16)((*sp >> shift) & 0x3)
if ((png_uint_16)((*sp >> shift) & 0x03)
== trans_values->gray)
{
*sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
@@ -2551,9 +2551,9 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
else
{
png_byte p = (png_byte)((*sp >> shift) & 0x3);
png_byte p = (png_byte)((*sp >> shift) & 0x03);
png_byte g = (png_byte)((gamma_table [p | (p << 2) |
(p << 4) | (p << 6)] >> 6) & 0x3);
(p << 4) | (p << 6)] >> 6) & 0x03);
*sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
*sp |= (png_byte)(g << shift);
}
@@ -2573,7 +2573,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
shift = 6;
for (i = 0; i < row_width; i++)
{
if ((png_uint_16)((*sp >> shift) & 0x3)
if ((png_uint_16)((*sp >> shift) & 0x03)
== trans_values->gray)
{
*sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
@@ -2599,7 +2599,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
shift = 4;
for (i = 0; i < row_width; i++)
{
if ((png_uint_16)((*sp >> shift) & 0xf)
if ((png_uint_16)((*sp >> shift) & 0x0f)
== trans_values->gray)
{
*sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
@@ -2607,9 +2607,9 @@ png_do_background(png_row_infop row_info, png_bytep row,
}
else
{
png_byte p = (png_byte)((*sp >> shift) & 0xf);
png_byte p = (png_byte)((*sp >> shift) & 0x0f);
png_byte g = (png_byte)((gamma_table[p |
(p << 4)] >> 4) & 0xf);
(p << 4)] >> 4) & 0x0f);
*sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
*sp |= (png_byte)(g << shift);
}
@@ -2629,7 +2629,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
shift = 4;
for (i = 0; i < row_width; i++)
{
if ((png_uint_16)((*sp >> shift) & 0xf)
if ((png_uint_16)((*sp >> shift) & 0x0f)
== trans_values->gray)
{
*sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
@@ -3362,10 +3362,10 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
{
sp = row + (png_size_t)((row_width - 1) >> 3);
dp = row + (png_size_t)row_width - 1;
shift = 7 - (int)((row_width + 7) & 7);
shift = 7 - (int)((row_width + 7) & 0x07);
for (i = 0; i < row_width; i++)
{
if ((*sp >> shift) & 0x1)
if ((*sp >> shift) & 0x01)
*dp = 1;
else
*dp = 0;
@@ -3385,10 +3385,10 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
{
sp = row + (png_size_t)((row_width - 1) >> 2);
dp = row + (png_size_t)row_width - 1;
shift = (int)((3 - ((row_width + 3) & 3)) << 1);
shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
for (i = 0; i < row_width; i++)
{
value = (*sp >> shift) & 0x3;
value = (*sp >> shift) & 0x03;
*dp = (png_byte)value;
if (shift == 6)
{
@@ -3406,10 +3406,10 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
{
sp = row + (png_size_t)((row_width - 1) >> 1);
dp = row + (png_size_t)row_width - 1;
shift = (int)((row_width & 1) << 2);
shift = (int)((row_width & 0x01) << 2);
for (i = 0; i < row_width; i++)
{
value = (*sp >> shift) & 0xf;
value = (*sp >> shift) & 0x0f;
*dp = (png_byte)value;
if (shift == 4)
{
@@ -3508,10 +3508,10 @@ png_do_expand(png_row_infop row_info, png_bytep row,
gray = (png_uint_16)(gray*0xff);
sp = row + (png_size_t)((row_width - 1) >> 3);
dp = row + (png_size_t)row_width - 1;
shift = 7 - (int)((row_width + 7) & 7);
shift = 7 - (int)((row_width + 7) & 0x07);
for (i = 0; i < row_width; i++)
{
if ((*sp >> shift) & 0x1)
if ((*sp >> shift) & 0x01)
*dp = 0xff;
else
*dp = 0;
@@ -3532,10 +3532,10 @@ png_do_expand(png_row_infop row_info, png_bytep row,
gray = (png_uint_16)(gray*0x55);
sp = row + (png_size_t)((row_width - 1) >> 2);
dp = row + (png_size_t)row_width - 1;
shift = (int)((3 - ((row_width + 3) & 3)) << 1);
shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
for (i = 0; i < row_width; i++)
{
value = (*sp >> shift) & 0x3;
value = (*sp >> shift) & 0x03;
*dp = (png_byte)(value | (value << 2) | (value << 4) |
(value << 6));
if (shift == 6)
@@ -3555,10 +3555,10 @@ png_do_expand(png_row_infop row_info, png_bytep row,
gray = (png_uint_16)(gray*0x11);
sp = row + (png_size_t)((row_width - 1) >> 1);
dp = row + (png_size_t)row_width - 1;
shift = (int)((1 - ((row_width + 1) & 1)) << 2);
shift = (int)((1 - ((row_width + 1) & 0x01)) << 2);
for (i = 0; i < row_width; i++)
{
value = (*sp >> shift) & 0xf;
value = (*sp >> shift) & 0x0f;
*dp = (png_byte)(value | (value << 4));
if (shift == 4)
{
@@ -3809,7 +3809,7 @@ png_build_gamma_table(png_structp png_ptr)
#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
if (png_ptr->transformations & (PNG_BACKGROUND | PNG_RGB_TO_GRAY))
if (png_ptr->transformations & ((PNG_BACKGROUND) | PNG_RGB_TO_GRAY))
{
g = 1.0 / (png_ptr->gamma);