Ship WASM builds of libjpeg-turbo and libwebp

Related to #1381
and #1175.

Ships WASM builds og libjpeg and libwebp. This PR doesn't include them
in the PHP build yet, only ships pre-build wasm binaries. It might
require further tweaking before they can be included in the GD build.

packages/php-wasm/compile/Makefile

@@ -32,6 +32,20 @@ libpng16/dist/root/lib/lib/libpng16.a: base-image libz
 	docker cp $$(docker create playground-php-wasm:libpng):/root/install/lib ./libpng16/dist/root/lib
 	docker cp $$(docker create playground-php-wasm:libpng):/root/install/include ./libpng16/dist/root/lib
 
+libjpeg: libjpeg/dist/root/lib/lib/libjpeg.a
+libjpeg/dist/root/lib/lib/libjpeg.a: base-image libz
+	mkdir -p ./libjpeg/dist/root/lib
+	docker build -f ./libjpeg/Dockerfile -t playground-php-wasm:libpng . --progress=plain
+	docker cp $$(docker create playground-php-wasm:libpng):/opt/libjpeg-turbo/lib32 ./libjpeg/dist/root/lib
+	docker cp $$(docker create playground-php-wasm:libpng):/opt/libjpeg-turbo/include ./libjpeg/dist/root/lib
+
+libwebp: libwebp/dist/root/lib/lib/libwebp.a
+libwebp/dist/root/lib/lib/libwebp.a: base-image libz
+	mkdir -p ./libwebp/dist/root/lib
+	docker build -f ./libwebp/Dockerfile -t playground-php-wasm:libpng .
+	docker cp $$(docker create playground-php-wasm:libpng):/root/install/lib ./libwebp/dist/root/lib
+	docker cp $$(docker create playground-php-wasm:libpng):/root/install/include ./libwebp/dist/root/lib
+
 libxml2: libxml2/dist/root/lib/lib/libxml2.a
 libxml2/dist/root/lib/lib/libxml2.a: base-image
 	mkdir -p ./libxml2/dist/root/lib
@@ -95,11 +109,13 @@ libcurl/dist/root/lib/lib/libcurl.a: base-image libz libopenssl
 	docker cp $$(docker create playground-php-wasm:libcurl):/root/curl-7.69.1/lib/.libs ./libcurl/dist/root/lib/lib
 	docker cp $$(docker create playground-php-wasm:libcurl):/root/curl-7.69.1/include/ ./libcurl/dist/root/lib
 
-all: libz libzip libpng16 libxml2 libopenssl libsqlite3 libiconv libncurses libedit bison2.7 oniguruma libcurl
+all: libz libzip libpng16 libjpeg libwebp libxml2 libopenssl libsqlite3 libiconv libncurses libedit bison2.7 oniguruma libcurl
 clean:
 	rm -rf ./libz/dist
 	rm -rf ./libzip/dist
 	rm -rf ./libpng16/dist
+	rm -rf ./libjpeg/dist
+	rm -rf ./libwebp/dist
 	rm -rf ./libxml2/dist
 	rm -rf ./libopenssl/dist
 	rm -rf ./libsqlite3/dist

packages/php-wasm/compile/libjpeg/Dockerfile

@@ -0,0 +1,16 @@
+FROM playground-php-wasm:base
+
+RUN mkdir -p /root/lib/include /root/lib/lib
+COPY ./libz/dist/root/lib/include /root/lib/include
+COPY ./libz/dist/root/lib/lib /root/lib/lib
+
+RUN wget https://github.com/libjpeg-turbo/libjpeg-turbo/releases/download/3.0.3/libjpeg-turbo-3.0.3.tar.gz -O libjpeg.tar.gz
+RUN tar -xzf libjpeg.tar.gz
+WORKDIR /root/libjpeg-turbo-3.0.3
+RUN ls -a
+RUN     source /root/emsdk/emsdk_env.sh && \
+        CPPFLAGS="-I/root/lib/include " \
+        LDFLAGS="-L/root/lib/lib " \
+        emcmake cmake -G"Unix Makefiles" -DCMAKE_PREFIX_PATH=/root/lib
+RUN source /root/emsdk/emsdk_env.sh && EMCC_SKIP="-lc -lz" EMCC_FLAGS="-sSIDE_MODULE" emmake make
+RUN source /root/emsdk/emsdk_env.sh && emmake make install

packages/php-wasm/compile/libjpeg/dist/root/lib/include/jconfig.h

@@ -0,0 +1,60 @@
+/* Version ID for the JPEG library.
+ * Might be useful for tests like "#if JPEG_LIB_VERSION >= 60".
+ */
+#define JPEG_LIB_VERSION  62
+
+/* libjpeg-turbo version */
+#define LIBJPEG_TURBO_VERSION  3.0.3
+
+/* libjpeg-turbo version in integer form */
+#define LIBJPEG_TURBO_VERSION_NUMBER  3000003
+
+/* Support arithmetic encoding when using 8-bit samples */
+#define C_ARITH_CODING_SUPPORTED 1
+
+/* Support arithmetic decoding when using 8-bit samples */
+#define D_ARITH_CODING_SUPPORTED 1
+
+/* Support in-memory source/destination managers */
+#define MEM_SRCDST_SUPPORTED  1
+
+/* Use accelerated SIMD routines when using 8-bit samples */
+/* #undef WITH_SIMD */
+
+/* This version of libjpeg-turbo supports run-time selection of data precision,
+ * so BITS_IN_JSAMPLE is no longer used to specify the data precision at build
+ * time.  However, some downstream software expects the macro to be defined.
+ * Since 12-bit data precision is an opt-in feature that requires explicitly
+ * calling 12-bit-specific libjpeg API functions and using 12-bit-specific data
+ * types, the unmodified portion of the libjpeg API still behaves as if it were
+ * built for 8-bit precision, and JSAMPLE is still literally an 8-bit data
+ * type.  Thus, it is correct to define BITS_IN_JSAMPLE to 8 here.
+ */
+#ifndef BITS_IN_JSAMPLE
+#define BITS_IN_JSAMPLE  8
+#endif
+
+#ifdef _WIN32
+
+#undef RIGHT_SHIFT_IS_UNSIGNED
+
+/* Define "boolean" as unsigned char, not int, per Windows custom */
+#ifndef __RPCNDR_H__            /* don't conflict if rpcndr.h already read */
+typedef unsigned char boolean;
+#endif
+#define HAVE_BOOLEAN            /* prevent jmorecfg.h from redefining it */
+
+/* Define "INT32" as int, not long, per Windows custom */
+#if !(defined(_BASETSD_H_) || defined(_BASETSD_H))   /* don't conflict if basetsd.h already read */
+typedef short INT16;
+typedef signed int INT32;
+#endif
+#define XMD_H                   /* prevent jmorecfg.h from redefining it */
+
+#else
+
+/* Define if your (broken) compiler shifts signed values as if they were
+   unsigned. */
+/* #undef RIGHT_SHIFT_IS_UNSIGNED */
+
+#endif