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[libpng10] Imported from libpng-1.0.13.tar

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This commit is contained in:
Glenn Randers-Pehrson
2002-04-15 09:19:46 -05:00
parent e68f5a361b
commit 80b4f15ae3
104 changed files with 3675 additions and 11492 deletions
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85
pngvcrd.c
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@@ -2,14 +2,14 @@
*
* For Intel x86 CPU and Microsoft Visual C++ compiler
*
* libpng 1.0.12beta1 - May 14, 2001
* libpng version 1.0.13 - April 15, 2002
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2001 Glenn Randers-Pehrson
* Copyright (c) 1998-2002 Glenn Randers-Pehrson
* Copyright (c) 1998, Intel Corporation
*
* Contributed by Nirav Chhatrapati, Intel Corporation, 1998
* Interface to libpng contributed by Gilles Vollant, 1999
* Debugging and cleanup by Greg Roelofs, 2000, 2001
*
*
* In png_do_read_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
@@ -19,6 +19,8 @@
*
* [png_read_filter_row_mmx_avg() bpp == 2 bugfix, GRR 20000916]
*
* [runtime MMX configuration, GRR 20010102]
*
*/
#define PNG_INTERNAL
@@ -37,6 +39,7 @@ png_mmx_support(void)
push ebx //CPUID will trash these
push ecx
push edx
pushfd //Save Eflag to stack
pop eax //Get Eflag from stack into eax
mov ecx, eax //Make another copy of Eflag in ecx
@@ -46,6 +49,8 @@ png_mmx_support(void)
popfd //Restored modified value back to Eflag reg
pushfd //Save Eflag to stack
pop eax //Get Eflag from stack
push ecx // save original Eflag to stack
popfd // restore original Eflag
xor eax, ecx //Compare the new Eflag with the original Eflag
jz NOT_SUPPORTED //If the same, CPUID instruction is not supported,
//skip following instructions and jump to
@@ -110,6 +115,8 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
png_debug(1,"in png_combine_row_asm\n");
if (mmx_supported == 2) {
/* this should have happened in png_init_mmx_flags() already */
png_warning(png_ptr, "asm_flags may not have been initialized");
png_mmx_support();
}
@@ -300,7 +307,8 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
__int64 mask0=0x0102040810204080;
if ( mmx_supported )
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
/* && mmx_supported */ )
{
srcptr = png_ptr->row_buf + 1;
dstptr = row;
@@ -382,8 +390,6 @@ end8:
incr1 = (disp)*pixel_bytes;
for (i = initial_val; i < final_val; i += incr1)
{
if (pixel_bytes > (png_size_t)(final_val-i))
pixel_bytes = (png_size_t)(final_val-i);
png_memcpy(dstptr, srcptr, pixel_bytes);
srcptr += incr1;
dstptr += incr1;
@@ -402,7 +408,8 @@ end8:
__int64 mask1=0x0101020204040808,
mask0=0x1010202040408080;
if ( mmx_supported )
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
/* && mmx_supported */ )
{
srcptr = png_ptr->row_buf + 1;
dstptr = row;
@@ -495,8 +502,6 @@ end16:
incr1 = (disp)*pixel_bytes;
for (i = initial_val; i < final_val; i += incr1)
{
if (pixel_bytes > (png_size_t)(final_val-i))
pixel_bytes = (png_size_t)(final_val-i);
png_memcpy(dstptr, srcptr, pixel_bytes);
srcptr += incr1;
dstptr += incr1;
@@ -524,7 +529,8 @@ end16:
len = (png_ptr->width)&~7;
diff = (png_ptr->width)&7;
if ( mmx_supported )
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
/* && mmx_supported */ )
{
_asm
{
@@ -627,8 +633,6 @@ end24:
incr1 = (disp)*pixel_bytes;
for (i = initial_val; i < final_val; i += incr1)
{
if (pixel_bytes > (png_size_t)(final_val-i))
pixel_bytes = (png_size_t)(final_val-i);
png_memcpy(dstptr, srcptr, pixel_bytes);
srcptr += incr1;
dstptr += incr1;
@@ -657,7 +661,8 @@ end24:
len = (png_ptr->width)&~7;
diff = (png_ptr->width)&7;
if ( mmx_supported )
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
/* && mmx_supported */ )
{
_asm
{
@@ -768,8 +773,6 @@ end32:
incr1 = (disp)*pixel_bytes;
for (i = initial_val; i < final_val; i += incr1)
{
if (pixel_bytes > (png_size_t)(final_val-i))
pixel_bytes = (png_size_t)(final_val-i);
png_memcpy(dstptr, srcptr, pixel_bytes);
srcptr += incr1;
dstptr += incr1;
@@ -793,7 +796,8 @@ end32:
mask1=0x2020202040404040,
mask0=0x4040808080808080;
if ( mmx_supported )
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
/* && mmx_supported */ )
{
srcptr = png_ptr->row_buf + 1;
dstptr = row;
@@ -927,8 +931,6 @@ end48:
incr1 = (disp)*pixel_bytes;
for (i = initial_val; i < final_val; i += incr1)
{
if (pixel_bytes > (png_size_t)(final_val-i))
pixel_bytes = (png_size_t)(final_val-i);
png_memcpy(dstptr, srcptr, pixel_bytes);
srcptr += incr1;
dstptr += incr1;
@@ -957,8 +959,6 @@ end48:
incr1 = (disp)*pixel_bytes;
for (i = initial_val; i < final_val; i += incr1)
{
if (pixel_bytes > (png_size_t)(final_val-i))
pixel_bytes = (png_size_t)(final_val-i);
png_memcpy(dp, sptr, pixel_bytes);
sptr += incr1;
dp += incr1;
@@ -987,6 +987,8 @@ png_do_read_interlace(png_structp png_ptr)
png_debug(1,"in png_do_read_interlace\n");
if (mmx_supported == 2) {
/* this should have happened in png_init_mmx_flags() already */
png_warning(png_ptr, "asm_flags may not have been initialized");
png_mmx_support();
}
@@ -1187,7 +1189,8 @@ png_do_read_interlace(png_structp png_ptr)
// NOTE: there is NO MMX code for 48-bit and 64-bit images
// use MMX routine if machine supports it
if ( mmx_supported )
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)
/* && mmx_supported */ )
{
if (pixel_bytes == 3)
{
@@ -1777,7 +1780,7 @@ loop4_pass4:
} /* end of mmx_supported */
else /* MMX not supported: use modified C code - takes advantage
* of inlining of png_memcpy for a constant */
* of inlining of memcpy for a constant */
{
if (pixel_bytes == 1)
{
@@ -3649,6 +3652,8 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
#endif
if (mmx_supported == 2) {
/* this should have happened in png_init_mmx_flags() already */
png_warning(png_ptr, "asm_flags may not have been initialized");
png_mmx_support();
}
@@ -3658,13 +3663,17 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
{
case 0: sprintf(filnm, "none");
break;
case 1: sprintf(filnm, "sub-%s", "MMX");
case 1: sprintf(filnm, "sub-%s",
(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" : "x86");
break;
case 2: sprintf(filnm, "up-%s", "MMX");
case 2: sprintf(filnm, "up-%s",
(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" : "x86");
break;
case 3: sprintf(filnm, "avg-%s", "MMX");
case 3: sprintf(filnm, "avg-%s",
(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" : "x86");
break;
case 4: sprintf(filnm, "Paeth-%s", "MMX");
case 4: sprintf(filnm, "Paeth-%s",
(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":"x86");
break;
default: sprintf(filnm, "unknw");
break;
@@ -3682,9 +3691,9 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
case PNG_FILTER_VALUE_SUB:
{
if (
(row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
(row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) &&
(row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
(row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
{
png_read_filter_row_mmx_sub(row_info, row);
}
@@ -3707,9 +3716,9 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
case PNG_FILTER_VALUE_UP:
{
if (
(row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
(row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) &&
(row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
(row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
{
png_read_filter_row_mmx_up(row_info, row, prev_row);
}
@@ -3731,9 +3740,9 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
case PNG_FILTER_VALUE_AVG:
{
if (
(row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
(row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) &&
(row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
(row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
{
png_read_filter_row_mmx_avg(row_info, row, prev_row);
}
@@ -3765,9 +3774,9 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
case PNG_FILTER_VALUE_PAETH:
{
if (
(row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
(row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) &&
(row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
(row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
{
png_read_filter_row_mmx_paeth(row_info, row, prev_row);
}