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src/share/native/sun/awt/libpng/pngrtran.c
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rev 13661 : 8217676: Upgrade libpng to 1.6.37
Reviewed-by: prr, jdv, kcr
@@ -27,14 +27,14 @@
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file and, per its terms, should not be removed:
*
- * Last changed in libpng 1.6.35 [July 15, 2018]
+ * Copyright (c) 2018-2019 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
+ * Copyright (c) 1996-1997 Andreas Dilger
+ * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*
@@ -44,10 +44,21 @@
* in pngtrans.c.
*/
#include "pngpriv.h"
+#ifdef PNG_ARM_NEON_IMPLEMENTATION
+# if PNG_ARM_NEON_IMPLEMENTATION == 1
+# define PNG_ARM_NEON_INTRINSICS_AVAILABLE
+# if defined(_MSC_VER) && defined(_M_ARM64)
+# include <arm64_neon.h>
+# else
+# include <arm_neon.h>
+# endif
+# endif
+#endif
+
#ifdef PNG_READ_SUPPORTED
/* Set the action on getting a CRC error for an ancillary or critical chunk. */
void PNGAPI
png_set_crc_action(png_structrp png_ptr, int crit_action, int ancil_action)
@@ -1206,13 +1217,13 @@
/* Invert the alpha channel (in tRNS) unless the pixels are
* going to be expanded, in which case leave it for later
*/
int i, istop = png_ptr->num_trans;
- for (i=0; i<istop; i++)
- png_ptr->trans_alpha[i] = (png_byte)(255 -
- png_ptr->trans_alpha[i]);
+ for (i = 0; i < istop; i++)
+ png_ptr->trans_alpha[i] =
+ (png_byte)(255 - png_ptr->trans_alpha[i]);
}
}
#endif /* READ_INVERT_ALPHA */
}
} /* background expand and (therefore) no alpha association. */
@@ -3012,25 +3023,23 @@
* calculated to make the sum 32768. This will result in different rounding
* to that used above.
*/
static int
png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row)
-
{
int rgb_error = 0;
png_debug(1, "in png_do_rgb_to_gray");
if ((row_info->color_type & PNG_COLOR_MASK_PALETTE) == 0 &&
(row_info->color_type & PNG_COLOR_MASK_COLOR) != 0)
{
- PNG_CONST png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
- PNG_CONST png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff;
- PNG_CONST png_uint_32 bc = 32768 - rc - gc;
- PNG_CONST png_uint_32 row_width = row_info->width;
- PNG_CONST int have_alpha =
- (row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0;
+ png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
+ png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff;
+ png_uint_32 bc = 32768 - rc - gc;
+ png_uint_32 row_width = row_info->width;
+ int have_alpha = (row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0;
if (row_info->bit_depth == 8)
{
#ifdef PNG_READ_GAMMA_SUPPORTED
/* Notice that gamma to/from 1 are not necessarily inverses (if
@@ -4169,16 +4178,15 @@
if ((row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0)
{
if (row_info->bit_depth == 8)
{
- PNG_CONST png_bytep table = png_ptr->gamma_from_1;
+ png_bytep table = png_ptr->gamma_from_1;
if (table != NULL)
{
- PNG_CONST int step =
- (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 4 : 2;
+ int step = (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 4 : 2;
/* The alpha channel is the last component: */
row += step - 1;
for (; row_width > 0; --row_width, row += step)
@@ -4188,17 +4196,16 @@
}
}
else if (row_info->bit_depth == 16)
{
- PNG_CONST png_uint_16pp table = png_ptr->gamma_16_from_1;
- PNG_CONST int gamma_shift = png_ptr->gamma_shift;
+ png_uint_16pp table = png_ptr->gamma_16_from_1;
+ int gamma_shift = png_ptr->gamma_shift;
if (table != NULL)
{
- PNG_CONST int step =
- (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 8 : 4;
+ int step = (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 8 : 4;
/* The alpha channel is the last component: */
row += step - 2;
for (; row_width > 0; --row_width, row += step)
@@ -4225,12 +4232,13 @@
#ifdef PNG_READ_EXPAND_SUPPORTED
/* Expands a palette row to an RGB or RGBA row depending
* upon whether you supply trans and num_trans.
*/
static void
-png_do_expand_palette(png_row_infop row_info, png_bytep row,
- png_const_colorp palette, png_const_bytep trans_alpha, int num_trans)
+png_do_expand_palette(png_structrp png_ptr, png_row_infop row_info,
+ png_bytep row, png_const_colorp palette, png_const_bytep trans_alpha,
+ int num_trans)
{
int shift, value;
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width=row_info->width;
@@ -4330,18 +4338,31 @@
if (num_trans > 0)
{
sp = row + (size_t)row_width - 1;
dp = row + ((size_t)row_width << 2) - 1;
- for (i = 0; i < row_width; i++)
+ i = 0;
+#ifdef PNG_ARM_NEON_INTRINSICS_AVAILABLE
+ if (png_ptr->riffled_palette != NULL)
+ {
+ /* The RGBA optimization works with png_ptr->bit_depth == 8
+ * but sometimes row_info->bit_depth has been changed to 8.
+ * In these cases, the palette hasn't been riffled.
+ */
+ i = png_do_expand_palette_rgba8_neon(png_ptr, row_info, row,
+ &sp, &dp);
+ }
+#else
+ PNG_UNUSED(png_ptr)
+#endif
+
+ for (; i < row_width; i++)
{
if ((int)(*sp) >= num_trans)
*dp-- = 0xff;
-
else
*dp-- = trans_alpha[*sp];
-
*dp-- = palette[*sp].blue;
*dp-- = palette[*sp].green;
*dp-- = palette[*sp].red;
sp--;
}
@@ -4354,12 +4375,19 @@
else
{
sp = row + (size_t)row_width - 1;
dp = row + (size_t)(row_width * 3) - 1;
+ i = 0;
+#ifdef PNG_ARM_NEON_INTRINSICS_AVAILABLE
+ i = png_do_expand_palette_rgb8_neon(png_ptr, row_info, row,
+ &sp, &dp);
+#else
+ PNG_UNUSED(png_ptr)
+#endif
- for (i = 0; i < row_width; i++)
+ for (; i < row_width; i++)
{
*dp-- = palette[*sp].blue;
*dp-- = palette[*sp].green;
*dp-- = palette[*sp].red;
sp--;
@@ -4769,11 +4797,23 @@
#ifdef PNG_READ_EXPAND_SUPPORTED
if ((png_ptr->transformations & PNG_EXPAND) != 0)
{
if (row_info->color_type == PNG_COLOR_TYPE_PALETTE)
{
- png_do_expand_palette(row_info, png_ptr->row_buf + 1,
+#ifdef PNG_ARM_NEON_INTRINSICS_AVAILABLE
+ if ((png_ptr->num_trans > 0) && (png_ptr->bit_depth == 8))
+ {
+ if (png_ptr->riffled_palette == NULL)
+ {
+ /* Initialize the accelerated palette expansion. */
+ png_ptr->riffled_palette =
+ (png_bytep)png_malloc(png_ptr, 256 * 4);
+ png_riffle_palette_neon(png_ptr);
+ }
+ }
+#endif
+ png_do_expand_palette(png_ptr, row_info, png_ptr->row_buf + 1,
png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans);
}
else
{
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