mozilla/pdf.js — Issue #887: Blending Modes
Author: brendandahl
Created: 2011-12-06 04:41:22+00:00
State: open
Labels: 1-core, 2-spec, 4-blend-mode

#881 Affects quite a few PDF's, looks like it will be easy to implement some of the blending modes that are natively supported. For the ones that aren't natively supported I think its going to be really difficult. Awhile back I remember Andreas mentioning it may be possible to support these using webgl shaders.

Adobe Blend Modes:
Normal
Multiply
Screen
Overlay
Darken
Lighten
ColorDodge
ColorBurn
HardLight
SoftLight
Difference
Exclusion

Hue
Saturation
Color
Luminosity

Natively Supported Modes:
source-over
destination-over
source-in
destination-in
source-out
destination-out
source-atop
destination-atop
lighter
darker
xor
copy