fix(SVG): don't use unique_ptr (revery-ui#32)

* SVG: don't use unique_ptr on MakeFromStream

* SVG: add ref & unref functions

* Patches: update SVG patch

* Patches: fix patch

* Patches: create generate patches script

esy/generate_patch_files.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+generate_patch() {
+  base_commit=$1
+  files=$2
+  output=$3
+
+  git diff $base_commit -- $files > $output
+}
+
+# SVG patch
+svg_base_commit="91c98f63fbb6365fba96b4141faa2d135c818dd9"
+svg_files="include/c/sk_svg.h include/c/sk_types.h src/c/sk_svg.cpp src/c/sk_types_priv.h"
+svg_output="./patches/svg-c-bindings.patch"
+generate_patch "$svg_base_commit" "$svg_files" "$svg_output"
+
+# BUILD.gn patch
+build_gn_base_commit="91c98f63fbb6365fba96b4141faa2d135c818dd9"
+build_gn_files="BUILD.gn"
+build_gn_output="./patches/build-svg.patch"
+generate_patch "$build_gn_base_commit" "$build_gn_files" "$build_gn_output"
+
+# Expose SVGDOM patch
+expose_svgdom_base_commit="91c98f63fbb6365fba96b4141faa2d135c818dd9"
+expose_svgdom_files="experimental/svg/model/SkSVGDOM.h"
+expose_svgdom_output="./patches/expose-svgdom.patch"
+generate_patch "$expose_svgdom_base_commit" "$expose_svgdom_files" "$expose_svgdom_output"

patches/svg-c-bindings.patch

@@ -31,7 +31,7 @@ index fa24d1ce0d..4cfeda87ed 100644
  typedef struct sk_3dview_t sk_3dview_t;
 
 diff --git a/src/c/sk_svg.cpp b/src/c/sk_svg.cpp
-index 01799b8799..1a89349784 100644
+index 01799b8799..c31d5d4fc8 100644
 --- a/src/c/sk_svg.cpp
 +++ b/src/c/sk_svg.cpp
 @@ -9,6 +9,11 @@
@@ -46,7 +46,7 @@ index 01799b8799..1a89349784 100644
  #include "sk_svg.h"
 
  #include "sk_types_priv.h"
-@@ -18,3 +23,26 @@
+@@ -18,3 +23,33 @@
  sk_canvas_t* sk_svgcanvas_create(const sk_rect_t* bounds, sk_xmlwriter_t* writer) {
      return ToCanvas(SkSVGCanvas::Make(*AsRect(bounds), AsXMLWriter(writer)).release());
  }
@@ -69,8 +69,15 @@ index 01799b8799..1a89349784 100644
 +}
 +
 +sk_svgdom_t *sk_svgdom_create_from_stream(sk_stream_t *stream) {
-+    std::unique_ptr<SkStream> skstream(AsStream(stream));
-+    return ToSVGDOM(SkSVGDOM::MakeFromStream(*skstream).release());
++    return ToSVGDOM(SkSVGDOM::MakeFromStream(*AsStream(stream)).release());
++}
++
++void sk_svgdom_ref(const sk_svgdom_t *svg) {
++    SkSafeRef(AsSVGDOM(svg));
++}
++
++void sk_svgdom_unref(const sk_svgdom_t *svg) {
++    SkSafeUnref(AsSVGDOM(svg));
 +}
 +#endif
 diff --git a/src/c/sk_types_priv.h b/src/c/sk_types_priv.h

src/c/sk_svg.cpp

@@ -42,7 +42,14 @@ float sk_svgdom_get_container_height(sk_svgdom_t *svgdom) {
 }
 
 sk_svgdom_t *sk_svgdom_create_from_stream(sk_stream_t *stream) {
-    std::unique_ptr<SkStream> skstream(AsStream(stream));
-    return ToSVGDOM(SkSVGDOM::MakeFromStream(*skstream).release());
+    return ToSVGDOM(SkSVGDOM::MakeFromStream(*AsStream(stream)).release());
+}
+
+void sk_svgdom_ref(const sk_svgdom_t *svg) {
+    SkSafeRef(AsSVGDOM(svg));
+}
+
+void sk_svgdom_unref(const sk_svgdom_t *svg) {
+    SkSafeUnref(AsSVGDOM(svg));
 }
 #endif