GD with AVIF on Windows

.diff

 ext/gd/config.w32 | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/ext/gd/config.w32 b/ext/gd/config.w32
index 541d5f51e0..8ed0205287 100644
--- a/ext/gd/config.w32
+++ b/ext/gd/config.w32
@@ -2,6 +2,7 @@
 
 ARG_WITH("gd", "Bundled GD support", "yes,shared");
 ARG_WITH("libwebp", "webp support", "yes");
+ARG_WITH("libavif", "avif support", "yes");
 
 if (PHP_GD != "no") {
 	if (
@@ -30,6 +31,14 @@ if (PHP_GD != "no") {
 				WARNING("libwebp not enabled; libraries and headers not found");
 			}
 		}
+		if (PHP_LIBAVIF != "no") {
+			if (CHECK_LIB("avif.lib", "gd", PHP_GD) &&
+				CHECK_HEADER_ADD_INCLUDE("avif.h", "CFLAGS_GD", PHP_GD + ";" + PHP_PHP_BUILD + "\\include\\avif")) {
+				ADD_FLAG("CFLAGS_GD", "/D HAVE_LIBAVIF /D HAVE_GD_AVIF");
+			} else {
+				WARNING("libavif not enabled; libraries and headers not found");
+			}
+		}
 		CHECK_LIB("User32.lib", "gd", PHP_GD);
 		CHECK_LIB("Gdi32.lib", "gd", PHP_GD);
 
@@ -39,7 +48,7 @@ if (PHP_GD != "no") {
 			gdft.c gd_gd2.c gd_gd.c gd_gif_in.c gd_gif_out.c gdhelpers.c gd_io.c gd_io_dp.c \
 			gd_io_file.c gd_io_ss.c gd_jpeg.c gdkanji.c gd_png.c gd_ss.c \
 			gdtables.c gd_topal.c gd_wbmp.c gdxpm.c wbmp.c gd_xbm.c gd_security.c gd_transform.c \
-			gd_filter.c gd_pixelate.c gd_rotate.c gd_color_match.c gd_webp.c \
+			gd_filter.c gd_pixelate.c gd_rotate.c gd_color_match.c gd_webp.c gd_avif.c \
 			gd_crop.c gd_interpolation.c gd_matrix.c gd_bmp.c gd_tga.c", "gd");
 		AC_DEFINE('HAVE_LIBGD', 1, 'GD support');
 		ADD_FLAG("CFLAGS_GD", " \

README

This requires libavif builds from https://github.com/winlibs/libavif/actions/runs/843457552.
The x86 build is broken, but x64 should work.

Based on https://github.com/morsssss/php-src/tree/avif;
the .diff needs to be applied on top.

avif.php

<?php

$im = imagecreatefromjpeg("https://windows.php.net/images/header-logo-win.jpg");
imageavif($im, __DIR__ ."/avif.avif");