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[libpng15] Optimized png_combine_row() when rows are aligned This gains a

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small percentage for 16-bit and 32-bit pixels in the typical case where the
output row buffers are appropriately aligned. The optimization was not
previously possible because the png_struct buffer was always misaligned.
This commit is contained in:
John Bowler
2011-10-07 18:36:37 -05:00
committed by Glenn Randers-Pehrson
parent ac8375d000
commit 8be28e3eb6
3 changed files with 24 additions and 11 deletions
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@@ -64,6 +64,10 @@ Version 1.5.6beta05 [October 7, 2011]
a bug in the code that attempted to align it; the code needs to subtract
one from the pointer to take account of the filter byte prepended to
each row.
Optimized png_combine_row() when rows are aligned This gains a small
percentage for 16-bit and 32-bit pixels in the typical case where the
output row buffers are appropriately aligned. The optimization was not
previously possible because the png_struct buffer was always misaligned.
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