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authorMichael Drake <michael.drake@codethink.co.uk>2020-07-06 16:09:36 +0100
committerMichael Drake <michael.drake@codethink.co.uk>2020-07-06 16:09:36 +0100
commit8442a27c2bb8df48029ceea6e64c4930106a57fc (patch)
tree1c8829cbd31e254550cf4661f7adcbb16c9113b5 /test
parenta937d161f6787ecc1c1bef9bad6039925ff13d72 (diff)
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Disposal Method: Handle Restore to previous with saved image.
Previously we decoded a previous frame over the current frame data to handle resoration. However, the previous frame depended on its own previous frame state for correct decode. Now we just make a copy of the previous frame data and copy it back to handle the GIF_FRAME_RESTORE case. See: https://github.com/libvips/libvips/issues/1084#issuecomment-653497200
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