- fix build with libpng 1.5.10

PR:		168632
Reported by:	Helge Oldach
Obtained from:	gentoo

2 files changed, 66 insertions, 0 deletions

diff --git a/graphics/xfig/files/patch-f_readpng.c b/graphics/xfig/files/patch-f_readpng.c
new file mode 100644
index 000000000000..a2d96737b686
--- /dev/null
+++ b/graphics/xfig/files/patch-f_readpng.c
@@ -0,0 +1,47 @@
+--- f_readpng.c.orig
++++ f_readpng.c
+@@ -73,7 +73,7 @@ read_png(FILE *file, int filetype, F_pic
+     }
+ 
+     /* set long jump recovery here */
+-    if (setjmp(png_ptr->jmpbuf)) {
++    if (setjmp(png_jmpbuf(png_ptr))) {
+ 	/* if we get here there was a problem reading the file */
+ 	png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
+ 	close_picfile(file,filetype);
+@@ -90,15 +90,17 @@ read_png(FILE *file, int filetype, F_pic
+     png_get_IHDR(png_ptr, info_ptr, &w, &h, &bit_depth, &color_type,
+ 	&interlace_type, &compression_type, &filter_type);
+ 
+-    if (info_ptr->valid & PNG_INFO_gAMA)
+-	png_set_gamma(png_ptr, 2.2, info_ptr->gamma);
+-    else
+-	png_set_gamma(png_ptr, 2.2, 0.45);
++    png_fixed_point gamma = 0.45;
++    png_get_gAMA_fixed(png_ptr,info_ptr,&gamma);
++    png_set_gamma(png_ptr, 2.2, gamma);
+ 
+-    if (info_ptr->valid & PNG_INFO_bKGD)
++    if (png_get_valid(png_ptr,info_ptr,PNG_INFO_bKGD)) {
+ 	/* set the background to the one supplied */
+-	png_set_background(png_ptr, &info_ptr->background,
++	png_color_16p background;
++	png_get_bKGD(png_ptr,info_ptr,&background);
++	png_set_background(png_ptr, background,
+ 		PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
++    }
+     else {
+ 	/* blend the canvas background using the alpha channel */
+ 	background.red   = x_bg_color.red >> 8;
+@@ -136,7 +138,11 @@ read_png(FILE *file, int filetype, F_pic
+ 
+ 	if (png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette)) {
+ 	    png_get_hIST(png_ptr, info_ptr, &histogram);
++#if PNG_LIBPNG_VER_MAJOR <= 1 && PNG_LIBPNG_VER_MINOR < 5
+ 	    png_set_dither(png_ptr, palette, num_palette, 256, histogram, 0);
++#else
++	    png_set_quantize(png_ptr, palette, num_palette, 256, histogram, 0);
++#endif
+ 	}
+     }
+     if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
diff --git a/graphics/xfig/files/patch-f_wrpng.c b/graphics/xfig/files/patch-f_wrpng.c
new file mode 100644
index 000000000000..7e516553fd68
--- /dev/null
+++ b/graphics/xfig/files/patch-f_wrpng.c
@@ -0,0 +1,19 @@
+--- f_wrpng.c.orig
++++ f_wrpng.c
+@@ -20,6 +20,7 @@
+ #include "w_msgpanel.h"
+ #include "w_setup.h"
+ #include <png.h>
++#include <zlib.h>
+ 
+ /*
+  * Write PNG file from rgb data
+@@ -59,7 +60,7 @@ write_png(FILE *file, unsigned char *dat
+     }
+ 
+     /* set long jump recovery here */
+-    if (setjmp(png_ptr->jmpbuf)) {
++    if (setjmp(png_jmpbuf(png_ptr))) {
+ 	/* if we get here there was a problem reading the file */
+ 	png_destroy_write_struct(&png_ptr, &info_ptr);
+ 	return False;