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author | Lars Knoll <lars.knoll@nokia.com> | 2009-03-23 09:34:13 (GMT) |
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committer | Simon Hausmann <simon.hausmann@nokia.com> | 2009-03-23 09:34:13 (GMT) |
commit | 67ad0519fd165acee4a4d2a94fa502e9e4847bd0 (patch) | |
tree | 1dbf50b3dff8d5ca7e9344733968c72704eb15ff /src/opengl/util/composition_mode_lighten.glsl | |
download | Qt-67ad0519fd165acee4a4d2a94fa502e9e4847bd0.zip Qt-67ad0519fd165acee4a4d2a94fa502e9e4847bd0.tar.gz Qt-67ad0519fd165acee4a4d2a94fa502e9e4847bd0.tar.bz2 |
Long live Qt!
Diffstat (limited to 'src/opengl/util/composition_mode_lighten.glsl')
-rw-r--r-- | src/opengl/util/composition_mode_lighten.glsl | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/opengl/util/composition_mode_lighten.glsl b/src/opengl/util/composition_mode_lighten.glsl new file mode 100644 index 0000000..1fbd27a --- /dev/null +++ b/src/opengl/util/composition_mode_lighten.glsl @@ -0,0 +1,9 @@ +// Dca' = max(Sca.Da, Dca.Sa) + Sca.(1 - Da) + Dca.(1 - Sa) +// Da' = Sa + Da - Sa.Da +vec4 composite(vec4 src, vec4 dst) +{ + vec4 result; + result.rgb = max(src.rgb * dst.a, dst.rgb * src.a) + src.rgb * (1 - dst.a) + dst.rgb * (1 - src.a); + result.a = src.a + dst.a - src.a * dst.a; + return result; +} |