From cc5f350ab9c825884424faaacc2fa3c403615220 Mon Sep 17 00:00:00 2001 From: Ryan Harrison Date: Wed, 5 Sep 2018 18:37:28 +0000 Subject: Update libpng from 1.6.22 -> 1.6.34 Updates third_party/libpng16 to Chromium's third_party/libpng @ a0e5c6a798a45a0dca175e2774ae0edc6aafc696 and applies PDFium specific patches. Originally landed as https://pdfium-review.googlesource.com/41910, but reverted. Bug=chromium:880322 Change-Id: Ib8249cb156135d028c02f67f9559bdd8695c04f5 Reviewed-on: https://pdfium-review.googlesource.com/42030 Reviewed-by: Lei Zhang Commit-Queue: Ryan Harrison --- third_party/libpng16/arm/filter_neon.S | 6 +- third_party/libpng16/arm/palette_neon_intrinsics.c | 137 +++++++++++++++++++++ 2 files changed, 140 insertions(+), 3 deletions(-) create mode 100644 third_party/libpng16/arm/palette_neon_intrinsics.c (limited to 'third_party/libpng16/arm') diff --git a/third_party/libpng16/arm/filter_neon.S b/third_party/libpng16/arm/filter_neon.S index 3b061d6bbf..000764cd21 100644 --- a/third_party/libpng16/arm/filter_neon.S +++ b/third_party/libpng16/arm/filter_neon.S @@ -1,9 +1,9 @@ /* filter_neon.S - NEON optimised filter functions * - * Copyright (c) 2014 Glenn Randers-Pehrson + * Copyright (c) 2014,2017 Glenn Randers-Pehrson * Written by Mans Rullgard, 2011. - * Last changed in libpng 1.6.16 [December 22, 2014] + * Last changed in libpng 1.6.31 [July 27, 2017] * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer @@ -16,7 +16,7 @@ #define PNG_VERSION_INFO_ONLY #include "../pngpriv.h" -#if defined(__linux__) && defined(__ELF__) +#if (defined(__linux__) || defined(__FreeBSD__)) && defined(__ELF__) .section .note.GNU-stack,"",%progbits /* mark stack as non-executable */ #endif diff --git a/third_party/libpng16/arm/palette_neon_intrinsics.c b/third_party/libpng16/arm/palette_neon_intrinsics.c new file mode 100644 index 0000000000..703b9ff250 --- /dev/null +++ b/third_party/libpng16/arm/palette_neon_intrinsics.c @@ -0,0 +1,137 @@ +/* palette_neon_intrinsics.c - NEON optimised palette expansion functions + * + * Copyright (c) 2017 The Chromium Authors. All rights reserved. + * Written by Richard Townsend , February 2017. + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#include "../pngpriv.h" + +#if PNG_ARM_NEON_IMPLEMENTATION == 1 + +#include + +/* Build an RGBA palette from the RGB and separate alpha palettes. */ +void +png_riffle_palette_rgba(png_structrp png_ptr, png_row_infop row_info) +{ + png_const_colorp palette = png_ptr->palette; + png_bytep riffled_palette = png_ptr->riffled_palette; + png_const_bytep trans_alpha = png_ptr->trans_alpha; + int num_trans = png_ptr->num_trans; + + if (row_info->bit_depth != 8) { + png_error(png_ptr, "bit_depth must be 8 for png_riffle_palette_rgba"); + return; + } + + /* Initially black, opaque. */ + uint8x16x4_t w = {{ + vdupq_n_u8(0x00), + vdupq_n_u8(0x00), + vdupq_n_u8(0x00), + vdupq_n_u8(0xff), + }}; + + int i; + /* First, riffle the RGB colours into a RGBA palette, the A value is + * set to opaque for now. */ + for (i = 0; i < (1 << row_info->bit_depth); i += 16) { + uint8x16x3_t v = vld3q_u8((png_const_bytep)(palette + i)); + w.val[0] = v.val[0]; + w.val[1] = v.val[1]; + w.val[2] = v.val[2]; + vst4q_u8(riffled_palette + (i << 2), w); + } + + /* Fix up the missing transparency values. */ + for (i = 0; i < num_trans; i++) { + riffled_palette[(i << 2) + 3] = trans_alpha[i]; + } +} + + +/* Expands a palettized row into RGBA. */ +int +png_do_expand_palette_neon_rgba(png_structrp png_ptr, png_row_infop row_info, + png_const_bytep row, const png_bytepp ssp, const png_bytepp ddp) +{ + + png_uint_32 row_width = row_info->width; + const png_uint_32 *riffled_palette = (const png_uint_32*)png_ptr->riffled_palette; + const png_int_32 pixels_per_chunk = 4; + + if (row_width < pixels_per_chunk) { + return 0; + } + + /* This function originally gets the last byte of the output row. + The NEON part writes forward from a given position, so we have + to seek this back by 4 pixels x 4 bytes. */ + *ddp = *ddp - ((pixels_per_chunk * sizeof(png_uint_32)) - 1); + + int i; + for (i = 0; i < row_width; i += pixels_per_chunk) { + uint32x4_t cur; + png_bytep sp = *ssp - i, dp = *ddp - (i << 2); + cur = vld1q_dup_u32 (riffled_palette + *(sp - 3)); + cur = vld1q_lane_u32(riffled_palette + *(sp - 2), cur, 1); + cur = vld1q_lane_u32(riffled_palette + *(sp - 1), cur, 2); + cur = vld1q_lane_u32(riffled_palette + *(sp - 0), cur, 3); + vst1q_u32((void *)dp, cur); + } + if (i != row_width) { + i -= pixels_per_chunk; /* Remove the amount that wasn't processed. */ + } + + /* Decrement output pointers. */ + *ssp = *ssp - i; + *ddp = *ddp - (i << 2); + return i; +} + +/* Expands a palettized row into RGB format. */ +int +png_do_expand_palette_neon_rgb(png_structrp png_ptr, png_row_infop row_info, + png_const_bytep row, const png_bytepp ssp, const png_bytepp ddp) +{ + png_uint_32 row_width = row_info->width; + png_const_bytep palette = (png_const_bytep)png_ptr->palette; + const png_uint_32 pixels_per_chunk = 8; + + if (row_width <= pixels_per_chunk) { + return 0; + } + + /* Seeking this back by 8 pixels x 3 bytes. */ + *ddp = *ddp - ((pixels_per_chunk * sizeof(png_color)) - 1); + + int i; + for (i = 0; i < row_width; i += pixels_per_chunk) { + uint8x8x3_t cur; + png_bytep sp = *ssp - i, dp = *ddp - ((i << 1) + i); + cur = vld3_dup_u8(palette + sizeof(png_color) * (*(sp - 7))); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 6)), cur, 1); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 5)), cur, 2); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 4)), cur, 3); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 3)), cur, 4); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 2)), cur, 5); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 1)), cur, 6); + cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 0)), cur, 7); + vst3_u8((void *)dp, cur); + } + + if (i != row_width) { + i -= pixels_per_chunk; /* Remove the amount that wasn't processed. */ + } + + /* Decrement output pointers. */ + *ssp = *ssp - i; + *ddp = *ddp - ((i << 1) + i); + return i; +} + +#endif /* PNG_ARM_NEON_IMPLEMENTATION */ -- cgit v1.2.3