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Imported from libpng-1.0.5c.tar

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This commit is contained in:
Glenn Randers-Pehrson
1999-11-27 10:22:33 -06:00
parent 6d8f3b080a
commit 5379b24536
46 changed files with 720 additions and 178 deletions
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10
pngrtran.c
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@@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* libpng 1.0.5a - October 23, 1999
* libpng 1.0.5c - November 27, 1999
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
@@ -92,13 +92,13 @@ png_set_background(png_structp png_ptr,
/* Note: if need_expand is set and color_type is either RGB or RGB_ALPHA
* (in which case need_expand is superfluous anyway), the background color
* might actually be gray yet not be flagged as such. This is not a problem
* for the current code, which uses PNG_FLAG_BACKGROUND_IS_GRAY only to
* for the current code, which uses PNG_BACKGROUND_IS_GRAY only to
* decide when to do the png_do_gray_to_rgb() transformation.
*/
if ((need_expand && !(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) ||
(!need_expand && background_color->red == background_color->green &&
background_color->red == background_color->blue))
png_ptr->flags |= PNG_FLAG_BACKGROUND_IS_GRAY;
png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
}
#endif
@@ -1171,7 +1171,7 @@ From Andreas Dilger e-mail to png-implement, 26 March 1998:
/* if gray -> RGB, do so now only if background is non-gray; else do later
* for performance reasons */
if (png_ptr->transformations & PNG_GRAY_TO_RGB &&
!(png_ptr->flags & PNG_FLAG_BACKGROUND_IS_GRAY))
!(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
@@ -1245,7 +1245,7 @@ From Andreas Dilger e-mail to png-implement, 26 March 1998:
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
/* if gray -> RGB, do so now only if we did not do so above */
if (png_ptr->transformations & PNG_GRAY_TO_RGB &&
png_ptr->flags & PNG_FLAG_BACKGROUND_IS_GRAY)
png_ptr->mode & PNG_BACKGROUND_IS_GRAY)
png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif