diff options
Diffstat (limited to 'thirdparty/libpng/pngrtran.c')
| -rw-r--r-- | thirdparty/libpng/pngrtran.c | 50 |
1 files changed, 26 insertions, 24 deletions
diff --git a/thirdparty/libpng/pngrtran.c b/thirdparty/libpng/pngrtran.c index ccc58ce6f1..9a8fad9f4a 100644 --- a/thirdparty/libpng/pngrtran.c +++ b/thirdparty/libpng/pngrtran.c @@ -1,7 +1,7 @@ /* pngrtran.c - transforms the data in a row for PNG readers * - * Copyright (c) 2018 Cosmin Truta + * Copyright (c) 2018-2019 Cosmin Truta * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson * Copyright (c) 1996-1997 Andreas Dilger * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. @@ -1182,20 +1182,20 @@ png_init_palette_transformations(png_structrp png_ptr) png_ptr->palette[png_ptr->background.index].blue; #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED - if ((png_ptr->transformations & PNG_INVERT_ALPHA) != 0) - { - if ((png_ptr->transformations & PNG_EXPAND_tRNS) == 0) - { - /* 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]); - } - } + if ((png_ptr->transformations & PNG_INVERT_ALPHA) != 0) + { + if ((png_ptr->transformations & PNG_EXPAND_tRNS) == 0) + { + /* 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]); + } + } #endif /* READ_INVERT_ALPHA */ } } /* background expand and (therefore) no alpha association. */ @@ -4320,9 +4320,11 @@ png_do_expand_palette(png_structrp png_ptr, png_row_infop row_info, * 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_neon_rgba(png_ptr, row_info, row, + 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++) @@ -4349,8 +4351,10 @@ png_do_expand_palette(png_structrp png_ptr, png_row_infop row_info, dp = row + (size_t)(row_width * 3) - 1; i = 0; #ifdef PNG_ARM_NEON_INTRINSICS_AVAILABLE - i = png_do_expand_palette_neon_rgb(png_ptr, row_info, row, + i = png_do_expand_palette_rgb8_neon(png_ptr, row_info, row, &sp, &dp); +#else + PNG_UNUSED(png_ptr) #endif for (; i < row_width; i++) @@ -4770,19 +4774,17 @@ png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info) #ifdef PNG_ARM_NEON_INTRINSICS_AVAILABLE if ((png_ptr->num_trans > 0) && (png_ptr->bit_depth == 8)) { - /* Allocate space for the decompressed full palette. */ if (png_ptr->riffled_palette == NULL) { - png_ptr->riffled_palette = png_malloc(png_ptr, 256*4); - if (png_ptr->riffled_palette == NULL) - png_error(png_ptr, "NULL row buffer"); - /* Build the RGBA palette. */ - png_riffle_palette_rgba(png_ptr, row_info); + /* 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); + png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans); } else |