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| -rw-r--r-- | bin/Makefile | 2 | ||||
| -rw-r--r-- | bin/man3/png.3 | 90 |
2 files changed, 91 insertions, 1 deletions
diff --git a/bin/Makefile b/bin/Makefile index c2bd7a09..c35e1c8f 100644 --- a/bin/Makefile +++ b/bin/Makefile @@ -135,7 +135,7 @@ $(HTMLS): html.sh style.sed hi scheme ttpre sh html.sh $< man1/$(<:.sh=.1) > $@ .h.html: - sh html.sh $< > $@ + sh html.sh $< man3/$(<:.h=.3) > $@ index.html: Makefile bin.7 sh html.sh Makefile bin.7 \ diff --git a/bin/man3/png.3 b/bin/man3/png.3 new file mode 100644 index 00000000..accffbd7 --- /dev/null +++ b/bin/man3/png.3 @@ -0,0 +1,90 @@ +.Dd July 25, 2019 +.Dt PNG 3 +.Os +. +.Sh NAME +.Nm png +.Nd basic PNG output +. +.Sh SYNOPSIS +.In png.h +. +.Ft void +.Fo pngHead +.Fa "FILE *file" +.Fa "uint32_t width" +.Fa "uint32_t height" +.Fa "uint8_t depth" +.Fa "uint8_t color" +.Fc +. +.Ft void +.Fn pngPalette "FILE *file" "const uint8_t *pal" "uint32_t len" +. +.Ft void +.Fn pngData "FILE *file" "const uint8_t *data" "uint32_t len" +. +.Ft void +.Fn pngTail "FILE *file" +. +.Sh DESCRIPTION +The +.Fn pngHead +function +writes the +.Sy IHDR +chunk to +.Fa file . +The +.Fa color +parameter can be one of +.Dv PNGGrayscale , +.Dv PNGTruecolor +optionally +.Em or Ns 'ed +with +.Dv PNGAlpha , +or +.Dv PNGIndexed . +. +.Pp +The +.Fn pngPalette +function +writes the +.Sy PLTE +chunk to +.Fa file . +. +.Pp +The +.Fn pngData +function +writes the +.Sy IDAT +chunk to +.Fa file +without compression. +The constants +.Dv PNGNone , +.Dv PNGSub , +.Dv PNGUp , +.Dv PNGAverage , +.Dv PNGPaeth +are defined +for use in PNG data. +. +.Pp +The +.Fn pngTail +function +writes the +.Sy IEND +chunk to +.Fa file . +. +.Sh ERRORS +Any errors from writing to +.Fa file +are handled by calling +.Xr err 3 . |