[GRASS5] [bug #2811] (grass) display/drivers/PNG/description.html default GRASS_PNG_COMPRESSION

[Markus Neteler via RT]

Here related details:

cd grass57/display/drivers/PNG/
grep GRASS_PNG_COMPRESSION *
description.html:  <LI><B>GRASS_PNG_COMPRESSION=[0|1|9]</B><BR>
write.c:        str = getenv("GRASS_PNG_COMPRESSION");

grep PNG_COMPRESSION_TYPE_DEFAULT *
write.c:                PNG_COMPRESSION_TYPE_DEFAULT,

grep PNG_COMPRESSION_TYPE_DEFAULT /usr/include/png.h
#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE

grep PNG_COMPRESSION_TYPE_BASE /usr/include/png.h
   png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */
#define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */
#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE

... still no idea what to add to the HTML page.

Markus

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