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Imported from libpng-1.0.5.tar

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This commit is contained in:
Glenn Randers-Pehrson
1999-10-14 07:43:10 -05:00
parent ad5dd1f0fb
commit 860ab2b1c0
48 changed files with 6420 additions and 285 deletions
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174
pngvcrd.c
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@@ -2,7 +2,7 @@
*
* For Intel x86 CPU and Microsoft Visual C++ compiler
*
* libpng 1.0.5 - October 5, 1999
* libpng 1.0.5 - October 15, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998, Intel Corporation
* Copyright (c) 1998, 1999 Glenn Randers-Pehrson
@@ -26,7 +26,6 @@ png_read_filter_row_c(png_structp png_ptr, png_row_infop row_info,
static int mmxsupport()
{
int mmx_supported_local = 0;
_asm {
pushfd //Save Eflag to stack
pop eax //Get Eflag from stack into eax
@@ -91,19 +90,19 @@ NOT_SUPPORTED:
void
png_combine_row(png_structp png_ptr, png_bytep row, int mask)
{
#ifndef MMX_BUG_IS_FIXED
#ifdef DISABLE_PNGVCRD_COMBINE
int save_mmx_supported = mmx_supported;
#endif
png_debug(1,"in png_combine_row_asm\n");
#ifndef MMX_BUG_IS_FIXED
#ifdef DISABLE_PNGVCRD_COMBINE
if ((png_ptr->transformations & PNG_INTERLACE) && png_ptr->pass != 6)
mmx_supported = 0;
else
#endif
if (mmx_supported == 2)
mmx_supported = mmxsupport();
if (mmx_supported == 2)
mmx_supported = mmxsupport();
if (mask == 0xff)
{
@@ -948,7 +947,7 @@ end48:
} /* end switch (png_ptr->row_info.pixel_depth) */
} /* end if (non-trivial mask) */
#ifndef MMX_BUG_IS_FIXED
#ifdef DISABLE_PNGVCRD_COMBINE
mmx_supported = save_mmx_supported;
#endif
@@ -961,18 +960,27 @@ void
png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
png_uint_32 transformations)
{
#ifndef MMX_BUG_IS_FIXED
#ifdef DISABLE_PNGVCRD_INTERLACE
int save_mmx_supported = mmx_supported;
#endif
png_debug(1,"in png_do_read_interlace\n");
#ifndef MMX_BUG_IS_FIXED
mmx_supported = 0;
#else
if (mmx_supported == 2)
mmx_supported = mmxsupport();
#ifdef DISABLE_PNGVCRD_INTERLACE
/* In libpng versions 1.0.3a through 1.0.4d,
* a sign error in the post-MMX cleanup code for each pixel_depth resulted
* in bad pixels at the beginning of some rows of some images, and also
* (due to out-of-range memory reads and writes) caused heap corruption
* when compiled with MSVC 6.0. The error was fixed in version 1.0.4e,
* and the code appears to work completely correctly, so it is enabled
* by default.
*/
if (1) /* all passes caused a heap problem in the old code */
mmx_supported = 0;
else
#endif
if (mmx_supported == 2)
mmx_supported = mmxsupport();
if (row != NULL && row_info != NULL)
{
@@ -1155,21 +1163,20 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
default: // This is the place where the routine is modified
{
__int64 const4 = 0x0000000000FFFFFF;
__int64 const5 = 0x000000FFFFFF0000;
// __int64 const5 = 0x000000FFFFFF0000; // unused...
__int64 const6 = 0x00000000000000FF;
//int mmx_supported = 1;
png_bytep sptr, dp;
png_uint_32 i;
png_size_t pixel_bytes;
int width = row_info->width;
pixel_bytes = (row_info->pixel_depth >> 3);
sptr = row + (row_info->width - 1) * pixel_bytes;
sptr = row + (width - 1) * pixel_bytes;
dp = row + (final_width - 1) * pixel_bytes;
// New code by Nirav Chhatrapati - Intel Corporation
// sign fix by GRR
// NOTE: there is NO MMX code for 48-bit and 64-bit images
if (mmx_supported) // use MMX routine if machine supports it
{
@@ -1336,16 +1343,29 @@ loop1_pass0:
dp -= width_mmx*8;
for (i = width; i; i--)
{
png_byte v[8];
int j;
png_memcpy(v, sptr, pixel_bytes);
/* I simplified this part in version 1.0.4e
* here and in several other instances where
* pixel_bytes == 1 -- GR-P
*
* Original code:
*
* png_byte v[8];
* png_memcpy(v, sptr, pixel_bytes);
* for (j = 0; j < png_pass_inc[pass]; j++)
* {
* png_memcpy(dp, v, pixel_bytes);
* dp -= pixel_bytes;
* }
* sptr -= pixel_bytes;
*
* Replacement code is in the next three lines:
*/
for (j = 0; j < png_pass_inc[pass]; j++)
{
png_memcpy(dp, v, pixel_bytes);
dp -= pixel_bytes;
}
sptr -= pixel_bytes;
*dp-- = *sptr;
sptr--;
}
}
else if ((pass == 2) || (pass == 3))
@@ -1381,16 +1401,13 @@ loop1_pass2:
dp -= width_mmx*4;
for (i = width; i; i--)
{
png_byte v[8];
int j;
png_memcpy(v, sptr, pixel_bytes);
for (j = 0; j < png_pass_inc[pass]; j++)
{
png_memcpy(dp, v, pixel_bytes);
dp -= pixel_bytes;
*dp-- = *sptr;
}
sptr -= pixel_bytes;
sptr --;
}
}
else //if ((pass == 4) || (pass == 5))
@@ -1427,16 +1444,13 @@ loop1_pass4:
dp -= width_mmx*2;
for (i = width; i; i--)
{
png_byte v[8];
int j;
png_memcpy(v, sptr, pixel_bytes);
for (j = 0; j < png_pass_inc[pass]; j++)
{
png_memcpy(dp, v, pixel_bytes);
dp -= pixel_bytes;
*dp-- = *sptr;
}
sptr -= pixel_bytes;
sptr --;
}
}
} /* end of pixel_bytes == 1 */
@@ -1474,8 +1488,8 @@ loop2_pass0:
}
}
sptr -= (width_mmx*2 + 2);
dp -= (width_mmx*16 + 2);
sptr -= (width_mmx*2 - 2); // sign fixed
dp -= (width_mmx*16 - 2); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1486,9 +1500,7 @@ loop2_pass0:
{
dp -= pixel_bytes;
png_memcpy(dp, v, pixel_bytes);
//dp -= pixel_bytes;
}
//sptr -= pixel_bytes;
}
}
@@ -1522,8 +1534,8 @@ loop2_pass2:
}
}
sptr -= (width_mmx*2 + 2);
dp -= (width_mmx*8 + 2);
sptr -= (width_mmx*2 - 2); // sign fixed
dp -= (width_mmx*8 - 2); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1534,9 +1546,7 @@ loop2_pass2:
{
dp -= pixel_bytes;
png_memcpy(dp, v, pixel_bytes);
//dp -= pixel_bytes;
}
//sptr -= pixel_bytes;
}
}
@@ -1565,8 +1575,8 @@ loop2_pass4:
}
}
sptr -= (width_mmx*2 + 2);
dp -= (width_mmx*4 + 2);
sptr -= (width_mmx*2 - 2); // sign fixed
dp -= (width_mmx*4 - 2); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1577,9 +1587,7 @@ loop2_pass4:
{
dp -= pixel_bytes;
png_memcpy(dp, v, pixel_bytes);
//dp -= pixel_bytes;
}
//sptr -= pixel_bytes;
}
}
} /* end of pixel_bytes == 2 */
@@ -1620,8 +1628,8 @@ loop4_pass0:
}
}
sptr -= (width_mmx*4 + 4);
dp -= (width_mmx*32 + 4);
sptr -= (width_mmx*4 - 4); // sign fixed
dp -= (width_mmx*32 - 4); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1632,9 +1640,7 @@ loop4_pass0:
{
dp -= pixel_bytes;
png_memcpy(dp, v, pixel_bytes);
//dp -= pixel_bytes;
}
//sptr -= pixel_bytes;
}
}
@@ -1668,8 +1674,8 @@ loop4_pass2:
}
}
sptr -= (width_mmx*4 + 4);
dp -= (width_mmx*16 + 4);
sptr -= (width_mmx*4 - 4); // sign fixed
dp -= (width_mmx*16 - 4); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1680,9 +1686,7 @@ loop4_pass2:
{
dp -= pixel_bytes;
png_memcpy(dp, v, pixel_bytes);
//dp -= pixel_bytes;
}
//sptr -= pixel_bytes;
}
}
@@ -1714,8 +1718,8 @@ loop4_pass4:
}
}
sptr -= (width_mmx*4 + 4);
dp -= (width_mmx*8 + 4);
sptr -= (width_mmx*4 - 4); // sign fixed
dp -= (width_mmx*8 - 4); // sign fixed
for (i = width; i; i--)
{
png_byte v[8];
@@ -1726,9 +1730,7 @@ loop4_pass4:
{
dp -= pixel_bytes;
png_memcpy(dp, v, pixel_bytes);
//dp -= pixel_bytes;
}
//sptr -= pixel_bytes;
}
}
@@ -1736,7 +1738,7 @@ loop4_pass4:
else if (pixel_bytes == 6)
{
for (i = row_info->width; i; i--)
for (i = width; i; i--)
{
png_byte v[8];
int j;
@@ -1752,7 +1754,7 @@ loop4_pass4:
else
{
for (i = row_info->width; i; i--)
for (i = width; i; i--)
{
png_byte v[8];
int j;
@@ -1772,23 +1774,17 @@ loop4_pass4:
{
if (pixel_bytes == 1)
{
for (i = row_info->width; i; i--)
for (i = width; i; i--)
{
png_byte v[8];
int j;
png_memcpy(v, sptr, pixel_bytes);
for (j = 0; j < png_pass_inc[pass]; j++)
{
png_memcpy(dp, v, pixel_bytes);
dp -= pixel_bytes;
}
sptr -= pixel_bytes;
*dp-- = *sptr;
sptr--;
}
}
else if (pixel_bytes == 3)
{
for (i = row_info->width; i; i--)
for (i = width; i; i--)
{
png_byte v[8];
int j;
@@ -1803,7 +1799,7 @@ loop4_pass4:
}
else if (pixel_bytes == 2)
{
for (i = row_info->width; i; i--)
for (i = width; i; i--)
{
png_byte v[8];
int j;
@@ -1818,7 +1814,7 @@ loop4_pass4:
}
else if (pixel_bytes == 4)
{
for (i = row_info->width; i; i--)
for (i = width; i; i--)
{
png_byte v[8];
int j;
@@ -1833,7 +1829,7 @@ loop4_pass4:
}
else if (pixel_bytes == 6)
{
for (i = row_info->width; i; i--)
for (i = width; i; i--)
{
png_byte v[8];
int j;
@@ -1848,7 +1844,7 @@ loop4_pass4:
}
else
{
for (i = row_info->width; i; i--)
for (i = width; i; i--)
{
png_byte v[8];
int j;
@@ -1872,7 +1868,7 @@ loop4_pass4:
(png_uint_32)row_info->pixel_depth + 7) >> 3);
}
#ifndef MMX_BUG_IS_FIXED
#ifdef DISABLE_PNGVCRD_INTERLACE
mmx_supported = save_mmx_supported;
#endif
}
@@ -3647,7 +3643,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
#ifdef PNG_DEBUG
char filnm[6];
#endif
#define UseMMX (1)
#define UseMMX 1
if (mmx_supported == 2)
mmx_supported = mmxsupport();
@@ -3660,7 +3656,11 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
#ifdef PNG_DEBUG
png_debug(1, "in png_read_filter_row\n");
png_debug1(0,"%s, ", (UseMMX?"MMX":"x86"));
#if (UseMMX == 1)
png_debug1(0,"%s, ", "MMX");
#else
png_debug1(0,"%s, ", "x86");
#endif
switch (filter)
{
case 0: sprintf(filnm, "None ");
@@ -3688,12 +3688,14 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
break;
case PNG_FILTER_VALUE_SUB:
{
if ( UseMMX && (row_info->pixel_depth > 8) &&
#if (UseMMX == 1)
if ((row_info->pixel_depth > 8) &&
(row_info->rowbytes >= 128) )
{
png_read_filter_row_mmx_sub(row_info, row);
} //end if UseMMX
}
else
#endif
{
png_uint_32 i;
png_uint_32 istop = row_info->rowbytes;
@@ -3711,12 +3713,14 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
}
case PNG_FILTER_VALUE_UP:
{
if ( UseMMX && (row_info->pixel_depth > 8) &&
#if (UseMMX == 1)
if ((row_info->pixel_depth > 8) &&
(row_info->rowbytes >= 128) )
{
png_read_filter_row_mmx_up(row_info, row, prev_row);
} //end if UseMMX
else
#endif
{
png_bytep rp;
png_bytep pp;
@@ -3731,12 +3735,14 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
}
case PNG_FILTER_VALUE_AVG:
{
if ( UseMMX && (row_info->pixel_depth > 8) &&
#if (UseMMX == 1)
if ((row_info->pixel_depth > 8) &&
(row_info->rowbytes >= 128) )
{
png_read_filter_row_mmx_avg(row_info, row, prev_row);
} //end if UseMMX
else
#endif
{
png_uint_32 i;
png_bytep rp = row;
@@ -3763,12 +3769,14 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
}
case PNG_FILTER_VALUE_PAETH:
{
if ( UseMMX && (row_info->pixel_depth > 8) &&
#if (UseMMX == 1)
if ((row_info->pixel_depth > 8) &&
(row_info->rowbytes >= 128) )
{
png_read_filter_row_mmx_paeth(row_info, row, prev_row);
} //end if UseMMX
else
#endif
{
png_uint_32 i;
png_bytep rp = row;