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Optimize png_do_expand_palette for ARM

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ARM-specific optimization processes 8 or 4 pixels at once.
Improves performance by around 10-22% on a recent ARM Chromebook.
This commit is contained in:
Richard Townsend
2018-01-25 19:03:04 +00:00
committed by Cosmin Truta
parent 2fc5ddff18
commit 7734cda20c
7 changed files with 213 additions and 10 deletions
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4
pngwrite.c
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@@ -948,6 +948,10 @@ png_write_destroy(png_structrp png_ptr)
png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list);
png_free(png_ptr, png_ptr->row_buf);
png_ptr->row_buf = NULL;
#ifdef PNG_READ_EXPANDED_SUPPORTED
png_free(png_ptr, png_ptr->riffled_palette);
png_ptr->riffled_palette = NULL;
#endif
#ifdef PNG_WRITE_FILTER_SUPPORTED
png_free(png_ptr, png_ptr->prev_row);
png_free(png_ptr, png_ptr->try_row);