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[devel] Removed premultiplied alpha feature.

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It will be replaced in the future with a function that accounts for gamma.
This commit is contained in:
Glenn Randers-Pehrson
2009-11-27 00:24:42 -06:00
parent 4cfdb3c095
commit 5876b850b2
11 changed files with 29 additions and 211 deletions
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19
pngread.c
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@@ -1,7 +1,7 @@
/* pngread.c - read a PNG file
*
* Last changed in libpng 1.4.0 [November 26, 2009]
* Last changed in libpng 1.4.0 [November 27, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -426,23 +426,6 @@ png_read_update_info(png_structp png_ptr, png_infop info_ptr)
png_warning(png_ptr,
"Ignoring extra png_read_update_info() call; row buffer not reallocated");
#ifdef PNG_READ_PREMULTIPLY_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_PREMULTIPLY_ALPHA)
{
/* TO DO:
* Check for linear colorspace and if not, issue a warning.
* If gAMA is present with gamma == 1.0, it's linear.
* If iCCP is present, assume user knows what they are doing
* and it's linear.
* If gAMA is present with gamma != 1.0, it's not linear.
* If no gAMA or iCCP, assume not linear.
* If not linear do:
* png_warning(png_ptr,
* "Premultiply should only be used with gamma == 1.0");
*/
}
#endif
png_read_transform_info(png_ptr, info_ptr);
}