Code to create Instancing Vertices inside SdfText

std::vector<SdfText::InstanceVertex> SdfText::getGlyphVertices( const SdfText::Font::GlyphMeasures &glyphMeasures, const DrawOptions &options, const std::vector<ColorA8u> &colors )
{
	const auto& textures = mTextureAtlases->mTextures;
	const auto& glyphMap = mTextureAtlases->mGlyphInfo;
	const auto& sdfScale = mTextureAtlases->mSdfScale;
	const auto& sdfPadding = mTextureAtlases->mSdfPadding;
	
	if( textures.empty() ) {
		return std::vector<SdfText::InstanceVertex>();
	}
	
	if( ! colors.empty() ) {
		CI_ASSERT( glyphMeasures.size() == colors.size() );
	}
	
	
	const vec2 fontRenderScale = vec2( mFont.getSize() ) / ( 32.0f * mTextureAtlases->mSdfScale );
	const vec2 fontOriginScale = vec2( mFont.getSize() ) / 32.0f;
	
	vec2 baseline = vec2( 0, 0 );
	
	std::vector<SdfText::InstanceVertex> ret;
	ret.reserve( glyphMeasures.size() );
	
	const float scale = options.getScale();
	for( size_t texIdx = 0; texIdx < textures.size(); ++texIdx ) {
		const gl::TextureRef &curTex = textures[texIdx];
		
		if( options.getPixelSnap() ) {
			baseline = vec2( floor( baseline.x ), floor( baseline.y ) );
		}
		
		for( auto glyphIt = glyphMeasures.begin(); glyphIt != glyphMeasures.end(); ++glyphIt ) {
			auto glyphInfoIt = glyphMap.find( glyphIt->first );
			if(  glyphInfoIt == glyphMap.end() ) {
				CI_LOG_W( "Glyph: " << glyphIt->first << ", not found." );
				continue;
			}
			
			const auto &glyphInfo = glyphInfoIt->second;
			if( glyphInfo.mTextureIndex != texIdx )
				continue;
			
			const auto &originOffset = glyphInfo.mOriginOffset;
			
			Rectf srcTexCoords = curTex->getAreaTexCoords( glyphInfo.mTexCoords );
			
			Rectf destRect = Rectf( glyphInfo.mTexCoords );
			destRect.scale( scale );
			destRect -= destRect.getUpperLeft();
			vec2 offset = vec2( 0, -( destRect.getHeight() ) );
			// Reverse the transformation applied during SDF generation
			float tx = sdfPadding.x;
			float ty = std::fabs( originOffset.y ) + sdfPadding.y;
			offset += scale * sdfScale * vec2( -tx, ty );
			// Use origin scale for horizontal offset
			offset += scale * fontOriginScale * vec2( originOffset.x, 0.0f );
			destRect += offset;
			destRect.scale( fontRenderScale );
			
			destRect += glyphIt->second * scale;
			destRect += baseline;
			
			InstanceVertex vert;
			vert.pos = vec2( destRect.x1, destRect.y1 );
			std::cout << destRect << std::endl;
			vert.size = destRect.getSize();
			vert.texCoords = vec4( srcTexCoords.x1, srcTexCoords.y1, srcTexCoords.x2, srcTexCoords.y2 );
			ret.emplace_back( std::move( vert ) );
		}
	}
	return ret;
}

Code to create vertices

auto sdfSize = sdfText->measureString( current->getText() );
auto glyphPlacement = sdfText->getGlyphPlacements( current->getText(), Rectf( 0, 0, sdfSize.x, 21.969 ) );
auto glyphVerts = sdfText->getGlyphVertices( glyphPlacement );
std::transform( glyphVerts.begin(), glyphVerts.end(), std::back_inserter( vert->vertices ),
[sdfSize]( const gl::SdfText::InstanceVertex &vert ){
	LabelVertices::LabelVertex ret;
	ret.position = vert.pos;
	ret.size = vert.size;
	ret.texCoords = vert.texCoords;
	return ret;
});

gistfile1.txt

auto sdfSize = sdfText->measureString( current->getText() );
	auto glyphPlacement = sdfText->getGlyphPlacements( current->getText(), Rectf( 0, 0, sdfSize.x, sdfSize.y ) );
	auto glyphVerts = sdfText->getGlyphVertices( glyphPlacement );
	for( auto vert : glyphVerts ) {
		vert.pos.x -= sdfSize.x / 2.0f;
		cout << vert.pos << " " << vert.size << " " << vert.texCoords << endl;
	}
	
	/* OUTPUT FROM ABOVE
	
	[ -143.330,  -19.594] [   21.969,   21.969] [    0.297,    1.000,    0.315,    0.982]
[ -118.706,  -19.371] [   21.969,   21.969] [    0.761,    1.000,    0.779,    0.982]
[  -96.894,  -15.920] [   21.969,   21.969] [    0.779,    1.000,    0.797,    0.982]
[  -74.360,  -19.371] [   21.969,   21.969] [    0.872,    1.000,    0.890,    0.982]
[  -53.232,  -19.594] [   21.969,   21.969] [    0.705,    1.000,    0.723,    0.982]
[  -44.796,  -19.371] [   21.969,   21.969] [    0.501,    1.000,    0.519,    0.982]
[  -24.390,  -19.594] [   21.969,   21.969] [    0.816,    1.000,    0.834,    0.982]
[  -11.736,  -19.594] [   21.969,   21.969] [    0.000,    1.000,    0.018,    0.982]
[   -1.172,  -19.278] [   21.969,   21.969] [    0.056,    1.000,    0.074,    0.982]
[   26.264,  -19.371] [   21.969,   21.969] [    0.872,    1.000,    0.890,    0.982]
[   47.392,  -19.594] [   21.969,   21.969] [    0.705,    1.000,    0.723,    0.982]
[   55.828,  -19.594] [   21.969,   21.969] [    0.854,    1.000,    0.872,    0.982]
[   67.798,  -19.371] [   21.969,   21.969] [    0.872,    1.000,    0.890,    0.982]
[   88.926,  -19.594] [   21.969,   21.969] [    0.816,    1.000,    0.834,    0.982]
[  101.580,  -19.371] [   21.969,   21.969] [    0.575,    1.000,    0.593,    0.982]
|error  | void ocr::StaticResource::processMapLabelLayout(ocr::Content *, ocr::LabelVertex *, const layout::Component &, ocr::layout::GeneratorName)[334] ROMAN
[ -144.413,  -19.278] [   21.969,   21.969] [    0.353,    1.000,    0.371,    0.982]
[ -119.789,  -15.920] [   21.969,   21.969] [    0.779,    1.000,    0.797,    0.982]
[  -97.255,  -19.371] [   21.969,   21.969] [    0.501,    1.000,    0.519,    0.982]
[  -76.849,  -19.594] [   21.969,   21.969] [    0.742,    1.000,    0.760,    0.982]
[  -55.721,  -19.594] [   21.969,   21.969] [    0.649,    1.000,    0.667,    0.982]
[  -47.285,  -19.371] [   21.969,   21.969] [    0.835,    1.000,    0.853,    0.982]
[  -28.285,  -19.594] [   21.969,   21.969] [    0.631,    1.000,    0.649,    0.982]
[   -7.157,  -19.594] [   21.969,   21.969] [    0.000,    1.000,    0.018,    0.982]
[    3.407,  -19.594] [   21.969,   21.969] [    0.111,    1.000,    0.129,    0.982]
[   25.219,  -19.371] [   21.969,   21.969] [    0.872,    1.000,    0.890,    0.982]
[   46.347,  -19.594] [   21.969,   21.969] [    0.854,    1.000,    0.872,    0.982]
[   58.317,  -19.371] [   21.969,   21.969] [    0.520,    1.000,    0.538,    0.982]
[   80.851,  -19.371] [   21.969,   21.969] [    0.761,    1.000,    0.779,    0.982]
[  102.663,  -19.594] [   21.969,   21.969] [    0.705,    1.000,    0.723,    0.982]

*/

gistfile2.txt

[ -143.330,   -8.438] [   21.969,   21.969] [    0.297,    1.000,    0.315,    0.982]
[ -118.706,   -8.215] [   21.969,   21.969] [    0.761,    1.000,    0.779,    0.982]
[  -96.894,   -4.764] [   21.969,   21.969] [    0.779,    1.000,    0.797,    0.982]
[  -74.360,   -8.215] [   21.969,   21.969] [    0.872,    1.000,    0.890,    0.982]
[  -53.232,   -8.438] [   21.969,   21.969] [    0.705,    1.000,    0.723,    0.982]
[  -44.796,   -8.215] [   21.969,   21.969] [    0.501,    1.000,    0.519,    0.982]
[  -24.390,   -8.438] [   21.969,   21.969] [    0.816,    1.000,    0.834,    0.982]
[  -11.736,   -8.438] [   21.969,   21.969] [    0.000,    1.000,    0.018,    0.982]
[   -1.172,   -8.122] [   21.969,   21.969] [    0.056,    1.000,    0.074,    0.982]
[   26.264,   -8.215] [   21.969,   21.969] [    0.872,    1.000,    0.890,    0.982]
[   47.392,   -8.438] [   21.969,   21.969] [    0.705,    1.000,    0.723,    0.982]
[   55.828,   -8.438] [   21.969,   21.969] [    0.854,    1.000,    0.872,    0.982]
[   67.798,   -8.215] [   21.969,   21.969] [    0.872,    1.000,    0.890,    0.982]
[   88.926,   -8.438] [   21.969,   21.969] [    0.816,    1.000,    0.834,    0.982]
[  101.580,   -8.215] [   21.969,   21.969] [    0.575,    1.000,    0.593,    0.982]

gistfile3.txt

// This comes from getGlyphPlacements
[    0.000,    0.000]
[   12.960,    0.000]
[   24.440,    0.000]
[   36.300,    0.000]
[   47.420,    0.000]
[   51.860,    0.000]
[   62.600,    0.000]
[   69.260,    0.000]
[   74.820,    0.000]
[   89.260,    0.000]
[  100.380,    0.000]
[  104.820,    0.000]
[  111.120,    0.000]
[  122.240,    0.000]
[  128.900,    0.000]
// This is the destination rect.
(8.75, 89.6875)-(20.3125, 101.25)
(21.71, 89.8047)-(33.2725, 101.367)
(33.19, 91.6211)-(44.7525, 103.184)
(45.05, 89.8047)-(56.6125, 101.367)
(56.17, 89.6875)-(67.7325, 101.25)
(60.61, 89.8047)-(72.1725, 101.367)
(71.35, 89.6875)-(82.9125, 101.25)
(78.0099, 89.6875)-(89.5724, 101.25)
(83.5699, 89.8535)-(95.1324, 101.416)
(98.0099, 89.8047)-(109.572, 101.367)
(109.13, 89.6875)-(120.692, 101.25)
(113.57, 89.6875)-(125.132, 101.25)
(119.87, 89.8047)-(131.432, 101.367)
(130.99, 89.6875)-(142.552, 101.25)
(137.65, 89.8047)-(149.212, 101.367)

Steps to Create Sdf

// just a note, BoldFont and Sdf are what is producing the Large labels, and RomanFont and Sdf are 
// being used to create the texture that seems to be having the opacity problem described in the email.
mBoldFont.reset( new gl::SdfText::Font( loadAssetOrResource( "fonts/HelveticaNeueLTPro-75Bold.ttf" ), 28 ) );
auto format = gl::SdfText::Format().textureWidth( 1024 ).textureHeight( 1024 );
mBoldSdf = gl::SdfText::create( *mBoldFont, format, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz " );
mRomanFont.reset( new gl::SdfText::Font( loadAssetOrResource( "fonts/HelveticaNeueLTPro55Roman.ttf" ), 20 ) );
mRomanSdf = gl::SdfText::create( *mRomanFont, format, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz " );