fix inversed grayscale conditional

bdb9cf4d · thierry · 1b535268 · bdb9cf4d
Commit bdb9cf4d authored Jan 18, 2016 by thierry
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grfmt_png.cpp modules/imgcodecs/src/grfmt_png.cpp +1 -1

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--- a/modules/imgcodecs/src/grfmt_png.cpp
+++ b/modules/imgcodecs/src/grfmt_png.cpp
@@ -266,7 +266,7 @@ bool  PngDecoder::readData( Mat& img )
            if( m_color_type == PNG_COLOR_TYPE_PALETTE )
                png_set_palette_to_rgb( png_ptr );

-            if( (m_color_type & PNG_COLOR_MASK_COLOR) != 0 && m_bit_depth < 8 )
+            if( (m_color_type & PNG_COLOR_MASK_COLOR) == 0 && m_bit_depth < 8 )
 #if (PNG_LIBPNG_VER_MAJOR*10000 + PNG_LIBPNG_VER_MINOR*100 + PNG_LIBPNG_VER_RELEASE >= 10209) || \
    (PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR == 0 && PNG_LIBPNG_VER_RELEASE >= 18)
                png_set_expand_gray_1_2_4_to_8( png_ptr );