SVG Render example

[Joel Winarske]

Hi folks,

I'm new to skia, and I understand that the SVG support is experimental.

That aside I've exercised the code to write out an SVG file.

I would now like to do the reverse.  Ideally add it into SkiaSDLExample to start.

Thanks,

Joel

[Florin Malita]

The SVG front-end is already hooked in Skia's viewer app, so you should be able to open some random SVG file with

out/Release/viewer --svgs <svg_dir> -m <svg_file_name>

If you're looking for examples of using the programmatic API, a good place to start is SvgSlide.cpp from said viewer app:

https://github.com/google/skia/blob/master/tools/viewer/SvgSlide.cpp

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[Joel Winarske]

Cool thanks.

I just adapted some code from nanobench, and it's working great.

Pretty slick stuff :)

[李智]

hello,guys, as svg is moved out of experimental dir in skia 91. 

in my case, i want to use skia's svg component to render svg files in android .

1.  generate ninja 

bin/gn gen out/arm64 --args='ndk="pathto/android-ndk-r19c" target_cpu="arm64" is_component_build=true is_debug=false skia_use_lua=false skia_use_zlib=false skia_use_libheif=false skia_enable_pdf=false skia_enable_tools=false skia_use_icu=false skia_enable_svg=true ndk_api=21'

2. compile libsvg.so and libskia.so

ninja -C out/arm64

3.  Codes and CMakeList like following

Code:

....

System.loadLibrary("myLibLinkedWith_svg_and_skia");

....

drawSvg(const void *data, size_t size, SkCanvas* canvas){

   auto data_wrap = SkData::MakeWithCopy(data, size);

  sk_sp<SkSVGDOM> svg_document_;

  if (data_wrap) {

      std::unique_ptr<SkStream> svg_stream = SkMemoryStream::Make(data_wrap);

     svg_document_ = SkSVGDOM::MakeFromStream(*svg_stream);

     svg_document_->render(canvas);

  }

}

CMakeList:

......

add_library(libskia SHARED IMPORTED )

set_target_properties(libskia PROPERTIES IMPORTED_LOCATION "${SKIA_DIR}/android/${ANDROID_ABI}/libskia.so")

add_library(libsvg SHARED IMPORTED)

set_target_properties(libsvg PROPERTIES IMPORTED_LOCATION "${DEMO_CORE_DIR}/third_party/skia/android/${ANDROID_ABI}/libsvg.so")

add_library(libshape SHARED IMPORTED)

set_target_properties(libshape PROPERTIES IMPORTED_LOCATION "${DEMO_CORE_DIR}/third_party/skia/android/${ANDROID_ABI}/libskshaper.so")

add_library( # Sets the name of the library.

   myLibLinkedWith_svg_and_skia

   SHARED

   ${my-source}

)

target_link_libraries( # Specifies the target library.

myLibLinkedWith_svg_and_skia

libskia

libshape

libsvg

...

)

Problem

as show above, my compiled shared_library will compile across.

But when load the library. because libsvg.so depnds on a lot symbols which is not SK_API of skia, these symbols are not exported in libskia.so, so there is a lot error of "dlopen failed: cannot locate symbol...." refercenced by libsvg.so when i try to System.load it.

these symbols includes but not limited to 

src/xml/SkDOM.h

src/utils/SkOSPath.h

src/core/SkStrSearch.h

......

I'm wondering if there is some options for me to config when compile to avoid modify skia sourcecode to add SK_API for the relevant symbols used by libsvg.so in libskia.so?

[Tyler Denniston]

Hello,

I don't think SkSVG (or other Skia modules?) currently builds in shared mode. For SVG specifically https://crbug.com/skia/11801 is tracking.

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