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[libpng15] Updated commentary about new API

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Glenn Randers-Pehrson
2011-11-10 06:32:19 -06:00
parent e6fb691c49
commit 84b0da9c94
3 changed files with 43 additions and 25 deletions
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10
pngread.c
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@@ -1404,7 +1404,7 @@ png_image_read_header(png_voidp argument)
{
/* gamma is irrelevant because libpng does gamma correction, what
* matters is if the cHRM chunk doesn't match or, in the absence of
* cRHM, if the iCCP profile looks to have different end points.
* cRHM, if the iCCP profile appears to have different end points.
*/
if (info_ptr->valid & PNG_INFO_cHRM)
{
@@ -1792,7 +1792,7 @@ png_image_read_end(png_voidp argument)
else /* compose on row: implemented below. */
{
do_local_compose = 1;
/* This leaves the alpha channel in the output, it has to be
/* This leaves the alpha channel in the output, so it has to be
* removed by the code below. Set the encoding to the 'OPTIMIZE'
* one so the code only has to hack on the pixels that require
* composition.
@@ -1804,7 +1804,7 @@ png_image_read_end(png_voidp argument)
else /* output needs an alpha channel */
{
/* This is tricky because it happens before the swap operation has
* been accomplished however the swap does *not* swap the added
* been accomplished; however, the swap does *not* swap the added
* alpha channel (weird API), so it must be added in the correct
* place.
*/
@@ -1857,7 +1857,7 @@ png_image_read_end(png_voidp argument)
# ifdef PNG_FORMAT_BGR_SUPPORTED
if (change & PNG_FORMAT_FLAG_BGR)
{
/* Check only the output format; PNG is never BGR, don't do this if
/* Check only the output format; PNG is never BGR; don't do this if
* the output is gray, but fix up the 'format' value in that case.
*/
if (format & PNG_FORMAT_FLAG_COLOR)
@@ -1904,7 +1904,7 @@ png_image_read_end(png_voidp argument)
png_error(png_ptr, "png_read_image: unsupported transformation");
}
/* Update the 'info' structure and make sure the result is as required, first
/* Update the 'info' structure and make sure the result is as required; first
* make sure to turn on the interlace handling if it will be required
* (because it can't be turned on *after* the call to png_read_update_info!)
*/