void SMAA::doEdgePass( const ci::gl::FboRef& source )
{
int w = mFboEdgePass->getWidth();
int h = mFboEdgePass->getHeight();
// Enable frame buffer
gl::ScopedFramebuffer fbo( mFboEdgePass );
gl::ScopedTextureBind tex0( source->getColorTexture(), 0 );
gl::ScopedGlslProg shader( mSMAAFirstPass );
mSMAAFirstPass->uniform( "uColorTex", 0 );
mSMAAFirstPass->uniform( "SMAA_RT_METRICS", vec4( 1.0f / w, 1.0f / h, (float)w, (float)h ) );
{
gl::clear();
gl::clearStencil( 0 );
gl::ScopedColor color( Color::white() );
gl::ScopedBlend blend( false );
gl::enableStencilTest();
gl::stencilFunc( GL_ALWAYS, 1, 0xFF ); // replace, ref = 1
gl::stencilOp( GL_KEEP, GL_KEEP, GL_REPLACE );
gl::stencilMask( 0xFF );
gl::drawSolidRect( mFboEdgePass->getBounds() );
gl::disableStencilTest();
}
}
ci::gl::Texture2dRef CameraProgram::getColorTexture(ci::gl::FboRef base, ci::gl::FboRef extra)
{
gl::ScopedFramebuffer fbo(base);
gl::draw(mCaptureTex, Area(ivec2(0), *matrixWindow()), app::getWindowBounds());
ProgramRef e = getEffect();
if (e) {
return e->getColorTexture(base, extra);
}
return base->getColorTexture();
}
void SMAA::apply( const ci::gl::FboRef& destination, const ci::gl::FboRef& source )
{
// Source and destination should have the same size
assert( destination->getWidth() == source->getWidth() );
assert( destination->getHeight() == source->getHeight() );
// Create or resize frame buffers
int w = source->getWidth();
int h = source->getHeight();
gl::Texture2d::Format fmt;
fmt.setMinFilter( GL_LINEAR );
fmt.setMagFilter( GL_LINEAR );
fmt.setWrap( GL_CLAMP_TO_BORDER, GL_CLAMP_TO_BORDER );
if( !mFboEdgePass || mFboEdgePass->getWidth() != w || mFboEdgePass->getHeight() != h ) {
// Note: using only RG channels decreases performance on NVIDIA,
// while RGBA does not decrease performance on Intel and AMD
//fmt.setInternalFormat( GL_RG );
//fmt.setSwizzleMask( GL_RED, GL_GREEN, GL_ZERO, GL_ONE );
mFboEdgePass = gl::Fbo::create( w, h, gl::Fbo::Format().colorTexture( fmt ).disableDepth().stencilBuffer() );
}
if( !mFboBlendPass || mFboBlendPass->getWidth() != w || mFboBlendPass->getHeight() != h ) {
fmt.setInternalFormat( GL_RGBA );
fmt.setSwizzleMask( GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA );
mFboBlendPass = gl::Fbo::create( w, h, gl::Fbo::Format().colorTexture( fmt ).disableDepth() );
}
// Apply first two passes
doEdgePass( source );
doBlendPass();
// Apply SMAA
gl::ScopedFramebuffer fbo( destination );
gl::ScopedTextureBind tex0( source->getColorTexture(), 0 );
gl::ScopedTextureBind tex1( mFboBlendPass->getColorTexture(), 1 );
gl::ScopedGlslProg shader( mSMAAThirdPass );
mSMAAThirdPass->uniform( "uColorTex", 0 );
mSMAAThirdPass->uniform( "uBlendTex", 1 );
mSMAAThirdPass->uniform( "SMAA_RT_METRICS", vec4( 1.0f / w, 1.0f / h, (float)w, (float)h ) );
{
gl::clear();
gl::ScopedColor color( Color::white() );
gl::ScopedBlend blend( false );
gl::drawSolidRect( destination->getBounds() );
}
}
ci::gl::Texture2dRef ImageProgram::getColorTexture(ci::gl::FboRef base, ci::gl::FboRef extra)
{
if(mImage) {
gl::ScopedFramebuffer fbo(base);
gl::clear(Color(mClearShade, mClearShade, mClearShade));
gl::pushViewport();
gl::pushMatrices();
gl::setMatricesWindow(app::getWindow()->getSize());
vec2 offset = (vec2)(app::getWindowSize() - mImage->getSize()) * 0.5f;
auto dst = mImage->getBounds();
dst.offset(offset);
gl::draw(mImage, dst);
gl::popMatrices();
gl::popViewport();
}
auto e = getEffect();
if(e) {
return e->getColorTexture(base, extra);
}
return base->getColorTexture();
}