{"action":"created","issue":{"url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp/issues/16","repository_url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp","labels_url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp/issues/16/labels{/name}","comments_url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp/issues/16/comments","events_url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp/issues/16/events","html_url":"https://github.com/JimBobSquarePants/ImageSharp/issues/16","id":186120563,"number":16,"title":"Blend modes","user":{"login":"JimBobSquarePants","id":385879,"avatar_url":"https://avatars.githubusercontent.com/u/385879?v=3","gravatar_id":"","url":"https://api.github.com/users/JimBobSquarePants","html_url":"https://github.com/JimBobSquarePants","followers_url":"https://api.github.com/users/JimBobSquarePants/followers","following_url":"https://api.github.com/users/JimBobSquarePants/following{/other_user}","gists_url":"https://api.github.com/users/JimBobSquarePants/gists{/gist_id}","starred_url":"https://api.github.com/users/JimBobSquarePants/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/JimBobSquarePants/subscriptions","organizations_url":"https://api.github.com/users/JimBobSquarePants/orgs","repos_url":"https://api.github.com/users/JimBobSquarePants/repos","events_url":"https://api.github.com/users/JimBobSquarePants/events{/privacy}","received_events_url":"https://api.github.com/users/JimBobSquarePants/received_events","type":"User","site_admin":false},"labels":[{"id":470481756,"url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp/labels/enhancement","name":"enhancement","color":"84b6eb","default":true},{"id":471590333,"url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp/labels/hacktoberfest","name":"hacktoberfest","color":"ededed","default":false},{"id":470481757,"url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp/labels/help%20wanted","name":"help wanted","color":"128A0C","default":true}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":16,"created_at":"2016-10-30T06:49:51Z","updated_at":"2016-10-30T07:04:32Z","closed_at":null,"body":"It would be great to have the ability to blend colors based on the W3c specification.\r\n\r\nhttp://www.w3.org/TR/compositing-1/#blending\r\n\r\nAdditional blend modes can be added as static methods on ColorSpacialTransforms in ColorSpacialTransforms.cs\r\n\r\nBlend Modes:\r\n- [ ] Separable blend modes\r\n  - [ ] normal blend mode\r\n  - [x] multiply blend mode\r\n  - [ ] screen blend mode\r\n  - [ ] overlay blend mode\r\n  - [ ] darken blend mode (committed awaiting review)\r\n  - [ ] lighten blend mode (committed awaiting review)\r\n  - [ ] color-dodge blend mode\r\n  - [ ] color-burn blend mode\r\n  - [ ] hard-light blend mode\r\n  - [ ] soft-light blend mode\r\n  - [ ] difference blend mode\r\n  - [ ] exclusion blend mode\r\n- [ ] Non-separable blend modes\r\n  - [ ] hue blend mode\r\n  - [ ] saturation blend mode\r\n  - [ ] color blend mode\r\n  - [ ] luminosity blend mode\r\n"},"comment":{"url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp/issues/comments/257135786","html_url":"https://github.com/JimBobSquarePants/ImageSharp/issues/16#issuecomment-257135786","issue_url":"https://api.github.com/repos/JimBobSquarePants/ImageSharp/issues/16","id":257135786,"user":{"login":"JimBobSquarePants","id":385879,"avatar_url":"https://avatars.githubusercontent.com/u/385879?v=3","gravatar_id":"","url":"https://api.github.com/users/JimBobSquarePants","html_url":"https://github.com/JimBobSquarePants","followers_url":"https://api.github.com/users/JimBobSquarePants/followers","following_url":"https://api.github.com/users/JimBobSquarePants/following{/other_user}","gists_url":"https://api.github.com/users/JimBobSquarePants/gists{/gist_id}","starred_url":"https://api.github.com/users/JimBobSquarePants/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/JimBobSquarePants/subscriptions","organizations_url":"https://api.github.com/users/JimBobSquarePants/orgs","repos_url":"https://api.github.com/users/JimBobSquarePants/repos","events_url":"https://api.github.com/users/JimBobSquarePants/events{/privacy}","received_events_url":"https://api.github.com/users/JimBobSquarePants/received_events","type":"User","site_admin":false},"created_at":"2016-10-30T07:04:32Z","updated_at":"2016-10-30T07:04:32Z","body":"_From @CVertex  16th August 2016_\r\n\r\nHey dudes,\r\n\r\nYears and years ago (when I was in uni) I wrote a multiply/add/exclude blend modes for a project. I remember being using some bitwise tricks for doing fast multiply to save on ops.\r\n\r\nI did some googling yesterday and found better techniques employed in https://github.com/teichgraf/WriteableBitmapEx/blob/master/Source/WriteableBitmapEx/WriteableBitmapBlitExtensions.cs\r\n\r\nMaybe worth using for inspiration? (when u start optimizing of course)\r\n\r\nCheers"}}
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