Imported from libpng-1.0.2a.tar

KNOWNBUG

@@ -7,13 +7,80 @@ Known bugs and suggested enhancements in libpng-1.0.2
    Loops need to be optimized everywhere
 
    Make them count down instead of up -- Kevin Bracey
-   
+
    Optimizing compilers don't need this, and making
    the change would be error prone -- Tom Lane, Glenn R-P
 
    Question whether i-- or --i is better.
 
    STATUS: Under investigation, postponed until after
-   libpng-1.0.2.  About 160 loops turned around
-   in libpng-1.0.2a, for testing.
+   libpng-1.0.2.  About 160 loops will be turned around
+   in libpng-1.0.Nn, for testing.
+
+2. June 15, 1998 -- BUG -- Evan Light
+
+   Under some conditions, 16-bit grayscale images aren't properly
+   expanded to rgb, because png_read_start_row() returns too small a
+   value of max_pixel_depth when png_set_filler() has also been called.
+
+   STATUS: Fixed in libpng-1.0.2a
+
+3. June 16, 1998 -- BUG -- Matt McConnell
+
+   When reading interlaced images with a progressive reader, in some
+   cases (interlaced images less than 3 pixels high) some passes are
+   not skipped that should be.
+
+   STATUS: Fixed in libpng-1.0.2a
+
+4. July 3, 1998 -- ENHANCEMENT -- Glenn R-P
+
+   Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions.
+
+   STATUS: Done in libpng-1.0.2a, awaiting comment on resulting test
+   images.
+
+5. July 4, 1998 -- ENHANCEMENT -- Glenn R-P
+
+   libpng-1.0.2 and earlier transform colors to gamma=1.0 space for
+   merging with background, and then back to the image's gamma.  The
+   bit_depth of the intermediate (gamma=1.0) representation is probably
+   not sufficient.  In the typical gamma=1/2.2 situation, the linear
+   pixels need about 4 more bits than the gamma-encoded ones, to avoid
+   loss of precision.  A similar situation exists with the rgb_to_gray
+   operation.
+
+   STATUS: under development.
+
+6. August 20, 1998 -- BUG -- Kevin Bracey
+
+   When using the filler transformation, the filler isn't written
+   into the leftmost pixel of each row.
+
+   Also, the filler operation isn't being done right when writing
+   files.  Some code that was removed from png_set_filler() in
+   libpng 1.0.1a shouldn't have been removed.
+
+   STATUS: Fixed in libpng-1.0.2a
+
+7. August 23, 1998 -- BUG -- Duncan Simpson
+
+   "static pngcharp tIME_string" should be changed to
+   "static char tIME_string[30]" in pngtest.c
+
+   STATUS: Fixed in libpng-1.0.2a
+
+8. August 24, 1998 -- BUG -- John Cromer
+
+   Order of byte-swap and shift operations seems to be incorrect in
+   png_do_write_transformations()
+
+   STATUS: Under investigation.
+
+9. September 11, 1998 -- ENHANCEMENT -- L. Peter Deutsch
+
+   The PNG_NO_STDIO macro should be split into PNG_NO_STDIO
+   and PNG_NO_CONSOLE_STDIO.
+
+   STATUS: Done in libpng-1.0.2a