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[libpng16] Do not build png_product2() when it is unused.

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Work around more Coverity-scan dead-code warnings.
This commit is contained in:
Glenn Randers-Pehrson
2015-02-07 09:03:30 -06:00
parent 8f0e2729dd
commit 8cd78da8b3
7 changed files with 49 additions and 27 deletions
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14
pngrtran.c
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@@ -3087,10 +3087,11 @@ png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row)
for (i = 0; i < row_width; i++)
{
png_uint_16 red, green, blue, w;
png_byte hi,lo;
red = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2;
green = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2;
blue = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2;
hi=*(sp)++; lo=*(sp)++; red = (png_uint_16)((hi << 8) | (lo));
hi=*(sp)++; lo=*(sp)++; green = (png_uint_16)((hi << 8) | (lo));
hi=*(sp)++; lo=*(sp)++; blue = (png_uint_16)((hi << 8) | (lo));
if (red == green && red == blue)
{
@@ -3138,10 +3139,11 @@ png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row)
for (i = 0; i < row_width; i++)
{
png_uint_16 red, green, blue, gray16;
png_byte hi,lo;
red = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2;
green = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2;
blue = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2;
hi=*(sp)++; lo=*(sp)++; red = (png_uint_16)((hi << 8) | (lo));
hi=*(sp)++; lo=*(sp)++; green = (png_uint_16)((hi << 8) | (lo));
hi=*(sp)++; lo=*(sp)++; blue = (png_uint_16)((hi << 8) | (lo));
if (red != green || red != blue)
rgb_error |= 1;