gl::Texture renderCairoToTexture( svg::DocRef doc )
{
cairo::SurfaceImage srf;
if( doc->getWidth() && doc->getHeight() )
srf = cairo::SurfaceImage( doc->getWidth(), doc->getHeight(), true );
else
srf = cairo::SurfaceImage( 640, 480, true );
cairo::Context ctx( srf );
ctx.render( *doc );
srf.flush();
return gl::Texture( srf.getSurface() );
}
Surface renderCairo( svg::DocRef doc, const svg::RenderVisitor &visitor )
{
cairo::SurfaceImage srf;
if( doc->getWidth() && doc->getHeight() )
srf = cairo::SurfaceImage( doc->getWidth(), doc->getHeight(), true );
else
srf = cairo::SurfaceImage( 640, 480, true );
cairo::Context ctx( srf );
ctx.setSourceRgb( 1, 1, 1 );
ctx.paint();
ctx.render( *doc, visitor );
srf.flush();
Surface result = srf.getSurface();
return srf.getSurface();
}
void HelloSvgApp::draw() {
gl::clear(Color{0, 0, 0});
gl::clear(GL_STENCIL_BUFFER_BIT);
mNanoVG->beginFrame(getWindowSize(), getWindowContentScale());
mNanoVG->translate(getWindowCenter());
mNanoVG->scale(vec2(0.75f * float(getWindowHeight()) / float(mDoc->getHeight())));
mNanoVG->translate(-mDoc->getBounds().getCenter());
mNanoVG->fontFace("Roboto");
mNanoVG->draw(*mDoc);
mNanoVG->endFrame();
}
void AnimatedRevealApp::update()
{
if( ( ! mDoc ) || mDone )
return;
// we'll stop drawing filled after we've drawn new pixels that are 1% of the size of the image
size_t imageSize, minArea;
if( mDoc->getWidth() && mDoc->getHeight() )
imageSize = mDoc->getWidth() * mDoc->getHeight();
else
imageSize = 640 * 480;
minArea = 1 + imageSize * 0.01f;
Surface frame = renderCairo( mDoc, SlowFillVisitor( mMinRenderElement, minArea, &mMinRenderElement, &mDone ) );
#if defined( RECORD_MOVIE )
mMovie.addFrame( frame );
if( mDone ) {
mMovie.addFrame( frame ); // otherwise we seem to lose the last frame
mMovie.finish();
}
#endif
mTex = gl::Texture::create( frame );
}
void AnimatedRevealApp::load( const fs::path &path )
{
mMinRenderElement = 0;
try {
if( path.extension() == ".svgz" ) // compressed
mDoc = svg::Doc::createFromSvgz( loadFile( path ) );
else
mDoc = svg::Doc::create( loadFile( path ) );
mDone = false;
#if defined( RECORD_MOVIE )
mMovie = qtime::MovieWriter( fs::path( getHomeDirectory() + "AnimatedReveal.mov" ), mDoc->getWidth(), mDoc->getHeight() );
#endif
}
catch( ci::Exception &exc ) {
console() << "failed to load doc, what: " << exc.what() << endl;
}
}