Use the compositing CSS spec at:
https://www.w3.org/TR/compositing-1/#blending
For the implementation.
a840c7f gsk: Add more modes to the blend shader
gsk/resources/glsl/blend.fs.glsl | 52 +++++++++++++++++++++++++++++++++-----
1 file changed, 46 insertions(+), 6 deletions(-)
Upstream: git.gnome.org