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Rev 6733 Rev 6881
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	sig_bit png_color_8 ; significant bits in color channels
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	sig_bit png_color_8 ; significant bits in color channels
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end if
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end if
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;#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
 - 
 
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;defined(PNG_READ_BACKGROUND_SUPPORTED)
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if (PNG_tRNS_SUPPORTED eq 1) | (PNG_READ_EXPAND_SUPPORTED eq 1) | (PNG_READ_BACKGROUND_SUPPORTED eq 1)
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	; The tRNS chunk supplies transparency data for paletted images and
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	; The tRNS chunk supplies transparency data for paletted images and
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	; other image types that don't need a full alpha channel.  There are
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	; other image types that don't need a full alpha channel.  There are
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	; "num_trans" transparency values for a paletted image, stored in the
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	; "num_trans" transparency values for a paletted image, stored in the
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	; same order as the palette colors, starting from index 0.  Values
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	; same order as the palette colors, starting from index 0.  Values
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	; Data is valid if (valid & PNG_INFO_tRNS) is non-zero.
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	; Data is valid if (valid & PNG_INFO_tRNS) is non-zero.
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	trans_alpha dd ? ;bytep ; alpha values for paletted image
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	trans_alpha dd ? ;bytep ; alpha values for paletted image
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	trans_color png_color_16 ;transparent color for non-palette image
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	trans_color png_color_16 ;transparent color for non-palette image
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;end if
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end if
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if (PNG_bKGD_SUPPORTED eq 1) | (PNG_READ_BACKGROUND_SUPPORTED eq 1)
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if (PNG_bKGD_SUPPORTED eq 1) | (PNG_READ_BACKGROUND_SUPPORTED eq 1)
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	; The bKGD chunk gives the suggested image background color if the
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	; The bKGD chunk gives the suggested image background color if the
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	; display program does not have its own background color and the image
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	; display program does not have its own background color and the image