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[libpng16] Avoid conditional directives that break statements in pngrutil.c (Romero

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Malaquias)
This commit is contained in:
Glenn Randers-Pehrson
2017-01-20 14:46:21 -06:00
parent c3f4e5fb1a
commit f604c74a5f
3 changed files with 16 additions and 9 deletions
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15
pngwutil.c
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@@ -675,10 +675,9 @@ png_write_IHDR(png_structrp png_ptr, png_uint_32 width, png_uint_32 height,
int interlace_type)
{
png_byte buf[13]; /* Buffer to store the IHDR info */
int is_invalid_depth;
png_debug(1, "in png_write_IHDR");
int is_invalid_depth;
/* Check that we have valid input data from the application info */
switch (color_type)
@@ -728,18 +727,22 @@ png_write_IHDR(png_structrp png_ptr, png_uint_32 width, png_uint_32 height,
break;
case PNG_COLOR_TYPE_GRAY_ALPHA:
if (bit_depth != 8 && bit_depth != 16)
is_invalid_depth = (bit_depth != 8);
#ifdef PNG_WRITE_16BIT_SUPPORTED
is_invalid_depth = (is_invalid_depth && bit_depth != 16);
#endif
if (is_invalid_depth)
png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");
png_ptr->channels = 2;
break;
case PNG_COLOR_TYPE_RGB_ALPHA:
is_invalid_depth = (bit_depth != 8);
#ifdef PNG_WRITE_16BIT_SUPPORTED
if (bit_depth != 8 && bit_depth != 16)
#else
if (bit_depth != 8)
is_invalid_depth = (is_invalid_depth && bit_depth != 16);
#endif
if (is_invalid_depth)
png_error(png_ptr, "Invalid bit depth for RGBA image");
png_ptr->channels = 4;