User contributions for Vegard
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9 April 2024
- 09:0309:03, 9 April 2024 diff hist +182 GLSL snippets →Colours: blue ice gradient current
- 09:0209:02, 9 April 2024 diff hist +31 N File:ice gradient.png Blue ice gradient current
20 December 2022
- 21:5521:55, 20 December 2022 diff hist +78 Tone mapping add ref current
19 December 2022
- 16:5216:52, 19 December 2022 diff hist +164 Tone mapping add my formula + reference
8 December 2022
- 13:1813:18, 8 December 2022 diff hist 0 GLSL snippets →Smooth variant: fix again
- 13:1413:14, 8 December 2022 diff hist +55 GLSL snippets →Smooth variant: fix saturation/value
30 November 2022
- 07:3407:34, 30 November 2022 diff hist +55 User:Vegard/Profiles Twitter -> Mastodon current
22 November 2022
- 08:5408:54, 22 November 2022 diff hist +58 SSE routines add link from saidwho12 current
13 November 2022
- 20:1520:15, 13 November 2022 diff hist +68 MediaWiki:Copyright add a link to my mastodon profile current
24 October 2022
- 22:5622:56, 24 October 2022 diff hist +47 GLSL snippets →Smooth variant
7 October 2022
- 14:3714:37, 7 October 2022 diff hist +27 ftrace add category current
- 14:3614:36, 7 October 2022 diff hist +23 mkinitrd add ftrace link current
- 14:1414:14, 7 October 2022 diff hist +39 ftrace fixes
- 14:0914:09, 7 October 2022 diff hist −45 ftrace fix
- 14:0814:08, 7 October 2022 diff hist +440 N ftrace new page
20 January 2022
- 06:5306:53, 20 January 2022 diff hist +84 Frame analysis add God of War current
30 December 2021
- 11:0211:02, 30 December 2021 diff hist +151 GLSL snippets →Ray marching: fix rayDirection()
28 December 2021
- 12:4212:42, 28 December 2021 diff hist +458 N Blur filter new page current
- 10:2110:21, 28 December 2021 diff hist +70 Gamma add link current
26 December 2021
- 14:2714:27, 26 December 2021 diff hist +169 N Tone mapping new page
9 December 2021
- 13:0113:01, 9 December 2021 diff hist +150 N Point-triangle intersection new page current
8 December 2021
- 08:1308:13, 8 December 2021 diff hist +61 Ray-triangle intersection add link current
- 08:1308:13, 8 December 2021 diff hist +810 N Ray-triangle intersection new page
15 June 2021
- 06:5506:55, 15 June 2021 diff hist +135 Nanite add link current
8 June 2021
- 13:3613:36, 8 June 2021 diff hist +657 N Nanite new article
- 05:5705:57, 8 June 2021 diff hist 0 N Category:Floating-point new category current
- 05:5705:57, 8 June 2021 diff hist +290 N Herbie new page current
- 05:5205:52, 8 June 2021 diff hist +28 Float to byte quantisation add category current
19 April 2021
- 11:0111:01, 19 April 2021 diff hist +201 N Bit-twiddling hacks new page current
26 February 2021
- 09:0609:06, 26 February 2021 diff hist +388 N Buffer iteration new page current
20 February 2021
- 15:3615:36, 20 February 2021 diff hist +41 Random number generators categorise current
- 15:3515:35, 20 February 2021 diff hist +362 N Random number generators new page
28 November 2020
- 08:5808:58, 28 November 2020 diff hist +100 Gamma add link
- 07:5807:58, 28 November 2020 diff hist +19 N sRGB create redirect current Tag: New redirect
- 07:5707:57, 28 November 2020 diff hist +75 Gamma add link
29 October 2020
- 17:1717:17, 29 October 2020 diff hist +51 B-tree make it extra clear that I'm not the author current
- 17:1517:15, 29 October 2020 diff hist +88 B-tree make source clearer
- 17:1417:14, 29 October 2020 diff hist +6,584 N B-tree new page
11 October 2020
- 19:2519:25, 11 October 2020 diff hist +111 N Fur shells new page current
8 September 2020
- 21:2321:23, 8 September 2020 diff hist +96 Frame analysis Doom Eternal
1 September 2020
- 13:2113:21, 1 September 2020 diff hist +106 Frame analysis Ghost of Tsushima
24 June 2020
- 19:1019:10, 24 June 2020 diff hist +99 Frame analysis →Games: Red Dead Redemption 2
16 June 2020
- 10:4110:41, 16 June 2020 diff hist +228 N Sphere tesselation new page current
25 May 2020
- 11:2411:24, 25 May 2020 diff hist +57 Self-running source No edit summary current
20 May 2020
- 08:1408:14, 20 May 2020 diff hist +13 Regex syntax fix bug current
- 08:0008:00, 20 May 2020 diff hist +6 Regex syntax No edit summary
- 07:5907:59, 20 May 2020 diff hist +216 Regex syntax less
16 May 2020
- 06:1406:14, 16 May 2020 diff hist +129 N Mesh simplification new page current
13 May 2020
- 09:4509:45, 13 May 2020 diff hist +100 N Buffer-centric IO new page current
2 May 2020
- 21:1921:19, 2 May 2020 diff hist +5 MediaWiki:Copyright update year
- 16:3216:32, 2 May 2020 diff hist −85 vegard.wiki:About/short DRY current
28 April 2020
- 11:3311:33, 28 April 2020 diff hist +43 incbin() →See also: add link current
- 11:3211:32, 28 April 2020 diff hist +166 incbin() add links
- 08:4308:43, 28 April 2020 diff hist +250 Range-based for loop →Usage: add output current
- 08:2108:21, 28 April 2020 diff hist +42 Range-based for loop add ranges
27 April 2020
- 20:2220:22, 27 April 2020 diff hist +99 N Texture compression new page current
22 April 2020
- 18:5418:54, 22 April 2020 diff hist +74 Gamma →See also: add link
21 April 2020
- 12:2112:21, 21 April 2020 diff hist +479 Angular distance add general formula for vectors current
18 April 2020
- 13:5813:58, 18 April 2020 diff hist +164 Regex syntax add references
- 13:5113:51, 18 April 2020 diff hist 0 N Category:Cheat sheets new category current
- 13:5113:51, 18 April 2020 diff hist +26 Regex syntax No edit summary
- 13:5013:50, 18 April 2020 diff hist +26 Pointer syntax add category current
- 13:4313:43, 18 April 2020 diff hist +66 Regex syntax update table
- 13:3913:39, 18 April 2020 diff hist +65 Regex syntax update table
- 13:3113:31, 18 April 2020 diff hist +142 Regex syntax update table
- 13:2613:26, 18 April 2020 diff hist +584 N Regex syntax new page
15 April 2020
- 16:5216:52, 15 April 2020 diff hist +81 File:quantization.png link generator current
- 16:5116:51, 15 April 2020 diff hist +268 N Float to byte quantisation new page
- 16:5016:50, 15 April 2020 diff hist 0 N File:quantization.png No edit summary
- 11:1811:18, 15 April 2020 diff hist +2 Self-running source →C
9 April 2020
- 09:3709:37, 9 April 2020 diff hist +48 N Pixel art upscaling Vegard moved page Pixel art upscaling to Texture magnification antialiasing current Tag: New redirect
- 09:3709:37, 9 April 2020 diff hist 0 m Texture magnification antialiasing Vegard moved page Pixel art upscaling to Texture magnification antialiasing current
- 08:5708:57, 9 April 2020 diff hist +43 Bash snippets add image current
- 08:5508:55, 9 April 2020 diff hist 0 N File:prompt.png No edit summary current
6 April 2020
- 11:5611:56, 6 April 2020 diff hist +86 Frame analysis add Batman: Arkham Knight
5 April 2020
- 22:2622:26, 5 April 2020 diff hist +39 User:Vegard/Profiles add keybase
4 April 2020
- 19:3619:36, 4 April 2020 diff hist +722 Texture magnification antialiasing hardware bilinear filtering
- 19:2619:26, 4 April 2020 diff hist +89 Texture magnification antialiasing →See also
- 10:4210:42, 4 April 2020 diff hist +87 Texture magnification antialiasing →See also
- 10:3710:37, 4 April 2020 diff hist +11 Texture magnification antialiasing No edit summary
- 10:3010:30, 4 April 2020 diff hist +71 Texture magnification antialiasing No edit summary
- 10:2910:29, 4 April 2020 diff hist +129 Texture magnification antialiasing fix nearest neighbour vs. linear
- 10:2710:27, 4 April 2020 diff hist 0 N File:pplanet-nearest.png No edit summary current
- 10:2710:27, 4 April 2020 diff hist 0 File:pplanet-linear.png Vegard uploaded a new version of File:pplanet-linear.png current
- 07:0807:08, 4 April 2020 diff hist −40 Texture magnification antialiasing remove TODOs
- 07:0707:07, 4 April 2020 diff hist +229 Texture magnification antialiasing add illustrations
- 07:0407:04, 4 April 2020 diff hist 0 N File:pplanet-pixelaware.png No edit summary current
- 07:0407:04, 4 April 2020 diff hist 0 N File:pplanet-linear.png No edit summary
- 07:0207:02, 4 April 2020 diff hist +47 Texture magnification antialiasing →Fragment shader: fixes
26 March 2020
- 19:5119:51, 26 March 2020 diff hist +114 N Quadrilateral interpolation new page current
24 March 2020
- 16:0916:09, 24 March 2020 diff hist +41 GLSL snippets →Gamma: fix bug
- 13:2413:24, 24 March 2020 diff hist +37 GLSL snippets →Volumetric light scattering (God rays): attribution
- 12:1812:18, 24 March 2020 diff hist +155 GLSL snippets →HSV: illustrations
- 12:1512:15, 24 March 2020 diff hist 0 N File:hsv2rgb2.png No edit summary current
- 12:1512:15, 24 March 2020 diff hist 0 N File:hsv2rgb.png No edit summary current
- 11:3411:34, 24 March 2020 diff hist +145 GLSL snippets →Volumetric light scattering (God rays)
- 11:2911:29, 24 March 2020 diff hist 0 N File:godrays.png No edit summary current
- 10:0310:03, 24 March 2020 diff hist +1,078 GLSL snippets add godrays
14 March 2020
- 16:5516:55, 14 March 2020 diff hist +451 N Duff's delimiter new page current
13 March 2020
- 09:1709:17, 13 March 2020 diff hist +37 Self-running source add category
- 08:5108:51, 13 March 2020 diff hist +630 N Self-running source new page
10 March 2020
- 09:0209:02, 10 March 2020 diff hist −10 Range-based for loop fix bug
- 09:0009:00, 10 March 2020 diff hist +694 N typecheck() new page current
8 March 2020
- 21:3621:36, 8 March 2020 diff hist +117 Rust safety add link current
- 05:1305:13, 8 March 2020 diff hist +960 N Struct enum new page current
7 March 2020
- 20:4520:45, 7 March 2020 diff hist +86 Texture magnification antialiasing add TODOs
- 20:4320:43, 7 March 2020 diff hist +148 Texture magnification antialiasing add TODO
- 20:3420:34, 7 March 2020 diff hist +3,691 N Texture magnification antialiasing new page
6 March 2020
- 09:5409:54, 6 March 2020 diff hist +304 Endianness make into table current
4 March 2020
- 20:1420:14, 4 March 2020 diff hist +83 Rust safety add link
- 19:0519:05, 4 March 2020 diff hist +176 N Endianness new page
1 March 2020
- 12:0212:02, 1 March 2020 diff hist +43 User:Vegard/Profiles add email address
- 12:0112:01, 1 March 2020 diff hist +121 rdtsc add link current
- 11:5811:58, 1 March 2020 diff hist +56 N Category:C preprocessor snippets add categories current
- 11:5811:58, 1 March 2020 diff hist −611 C preprocessor snippets move to category current Tag: New redirect
- 11:5611:56, 1 March 2020 diff hist +638 N is set() new page current
- 11:5411:54, 1 March 2020 diff hist +37 X macros add category current
- 11:5411:54, 1 March 2020 diff hist +37 is constexpr() add category current
- 11:5411:54, 1 March 2020 diff hist +37 incbin() add category
- 11:5311:53, 1 March 2020 diff hist +37 Range-based for loop add category
29 February 2020
- 19:5619:56, 29 February 2020 diff hist +27 C preprocessor snippets →See also
- 19:5219:52, 29 February 2020 diff hist +199 Range-based for loop clarify
- 17:3517:35, 29 February 2020 diff hist +913 N Range-based for loop new page
- 07:5707:57, 29 February 2020 diff hist +75 X macros →See also: add link
25 February 2020
- 23:2923:29, 25 February 2020 diff hist +79 Rust safety add link
- 23:2923:29, 25 February 2020 diff hist +88 Rust safety add link
- 23:2823:28, 25 February 2020 diff hist +99 Rust safety add link
- 23:2723:27, 25 February 2020 diff hist +66 Rust safety add link
- 18:1918:19, 25 February 2020 diff hist +235 Pseudoangles add new code variant current
- 15:0215:02, 25 February 2020 diff hist +38 N Equalisation Vegard moved page Equalisation to Digital frequency filter current Tag: New redirect
- 15:0215:02, 25 February 2020 diff hist 0 m Digital frequency filter Vegard moved page Equalisation to Digital frequency filter current
- 14:5314:53, 25 February 2020 diff hist +27 Z buffer make stub, add TODO current
- 14:5214:52, 25 February 2020 diff hist +10 UML make stub current
- 14:5214:52, 25 February 2020 diff hist +10 Triplanar mapping make stub current
- 14:5114:51, 25 February 2020 diff hist +30 Transformation matrix →See also: add link current
- 14:5114:51, 25 February 2020 diff hist +10 The Witness make stub current
- 14:5014:50, 25 February 2020 diff hist +28 Homogeneous coordinates add category current
- 14:4914:49, 25 February 2020 diff hist +37 N vec4 Vegard moved page vec4 to Homogeneous coordinates current Tag: New redirect
- 14:4914:49, 25 February 2020 diff hist 0 m Homogeneous coordinates Vegard moved page vec4 to Homogeneous coordinates
- 14:4814:48, 25 February 2020 diff hist +10 Homogeneous coordinates No edit summary
- 14:4814:48, 25 February 2020 diff hist +37 OpenGL snippets add link current
- 14:4714:47, 25 February 2020 diff hist +29 N OpenGL Vegard moved page OpenGL to OpenGL snippets current Tag: New redirect
- 14:4714:47, 25 February 2020 diff hist 0 m OpenGL snippets Vegard moved page OpenGL to OpenGL snippets
- 14:4614:46, 25 February 2020 diff hist +18 Jon Blow emacs colorscheme use wikitable current
- 14:4414:44, 25 February 2020 diff hist +10 BPF make stub current
- 14:4314:43, 25 February 2020 diff hist +10 Rust safety make stub
- 14:4014:40, 25 February 2020 diff hist +10 Rotor make stub current
- 14:3614:36, 25 February 2020 diff hist 0 m Category:Stubs Vegard moved page Category:Stub to Category:Stubs without leaving a redirect: categories should be plural current
- 14:3614:36, 25 February 2020 diff hist +1 Template:Stub make category plural current
- 14:3414:34, 25 February 2020 diff hist +71 N Category:Stubs add description
- 14:3414:34, 25 February 2020 diff hist +10 Enharmonic spelling make stub current
- 14:3314:33, 25 February 2020 diff hist +1 Template:Stub fix typo
- 14:3214:32, 25 February 2020 diff hist +178 N Template:Stub new template
- 14:2714:27, 25 February 2020 diff hist +72 C preprocessor snippets add links
- 12:3712:37, 25 February 2020 diff hist +228 Pseudoangles add illustrations
- 12:3312:33, 25 February 2020 diff hist 0 N File:pseudoangles.png No edit summary current
- 12:3212:32, 25 February 2020 diff hist 0 N File:atan.png No edit summary current
- 11:5311:53, 25 February 2020 diff hist +9 The Witness add TODO
- 11:3011:30, 25 February 2020 diff hist +9 Water shaders add TOC current
- 11:2911:29, 25 February 2020 diff hist +30 Water shaders fix images
- 11:2711:27, 25 February 2020 diff hist +218 Digital frequency filter add thumbnail
- 11:2111:21, 25 February 2020 diff hist +203 N File:filter2.png Using a FIR low-pass filter with a Hann window on a 440 Hz + 110 Hz signal (top) at a frequency of 220 Hz yields a decomposition into two signals (bottom two) roughly the right frequencies. current
- 11:1711:17, 25 February 2020 diff hist −5 Digital frequency filter No edit summary
24 February 2020
- 14:0114:01, 24 February 2020 diff hist +546 N Triplanar mapping new page
- 13:5213:52, 24 February 2020 diff hist +48 N Category:TODO create category current
- 13:5113:51, 24 February 2020 diff hist +118 Normals add link current
- 13:5013:50, 24 February 2020 diff hist +1 Template:TODO fix bug current
- 13:5013:50, 24 February 2020 diff hist +5 Template:TODO fix style
- 13:4513:45, 24 February 2020 diff hist −3 Template:TODO attempt to fix bug
- 13:4413:44, 24 February 2020 diff hist +45 Template:TODO add category
- 13:3513:35, 24 February 2020 diff hist −6 Template:TODO attempt to fix bug
- 13:3513:35, 24 February 2020 diff hist +3 Template:TODO fix bug
- 13:2113:21, 24 February 2020 diff hist +127 N Template:TODO new template
- 11:5811:58, 24 February 2020 diff hist +89 Frame analysis →Games: Far Cry 5
- 10:1610:16, 24 February 2020 diff hist +139 Water shaders add pictures
- 10:1510:15, 24 February 2020 diff hist +40 N File:Super Mario Sunshine water.png Super Mario Sunshine water current
- 10:1110:11, 24 February 2020 diff hist +26 N File:shadertoy-wtV3W1.png Pond ripples current
- 10:0910:09, 24 February 2020 diff hist +30 N File:shadertoy-ltfGD7.png Wind Waker Ocean current
- 10:0810:08, 24 February 2020 diff hist +71 Water shaders No edit summary
22 February 2020
- 07:2807:28, 22 February 2020 diff hist +179 N Water shaders new page
18 February 2020
- 14:2314:23, 18 February 2020 diff hist 0 Frame analysis →The Witcher 3: update link
17 February 2020
- 15:5115:51, 17 February 2020 diff hist +137 Barycentric coordinates add link current
16 February 2020
- 22:2922:29, 16 February 2020 diff hist +23 N vegard.wiki:Copyrights new page current
- 22:2622:26, 16 February 2020 diff hist −1 Main Page No edit summary current
- 22:2622:26, 16 February 2020 diff hist +11 Main Page remove TOC
- 21:5821:58, 16 February 2020 diff hist +53 Digital frequency filter add link
- 21:5421:54, 16 February 2020 diff hist +1,713 N Digital frequency filter new page
- 08:1608:16, 16 February 2020 diff hist +249 Frame analysis added gears 5 + plague tale
- 08:1208:12, 16 February 2020 diff hist +94 Frame analysis added anki 3d
- 08:0608:06, 16 February 2020 diff hist +293 Frame analysis added total war
- 08:0308:03, 16 February 2020 diff hist +221 Frame analysis added battlefield 3 + 4
- 07:5107:51, 16 February 2020 diff hist +93 Frame analysis added killzone 2
- 07:4207:42, 16 February 2020 diff hist +100 Frame analysis added league of legends
- 07:1807:18, 16 February 2020 diff hist +103 Frame analysis add bioshock infinite
- 07:1207:12, 16 February 2020 diff hist +1,584 N Frame analysis new page
14 February 2020
- 18:3218:32, 14 February 2020 diff hist 0 Thunk →Definition: fix ridiculous typo current
- 07:3407:34, 14 February 2020 diff hist +80 Definitions →C/C++ current
- 07:2307:23, 14 February 2020 diff hist +487 Definitions →C/C++: clarify
- 07:1307:13, 14 February 2020 diff hist +1,046 N Definitions new page
10 February 2020
- 10:3410:34, 10 February 2020 diff hist +35 Global variables clarify current
- 10:3110:31, 10 February 2020 diff hist +39 Pointer syntax clarify names
- 10:2910:29, 10 February 2020 diff hist −1 Pointer syntax →Pointer to member function
- 10:2910:29, 10 February 2020 diff hist −1 Pointer syntax →Pointer to function
- 10:2910:29, 10 February 2020 diff hist +163 Global variables add note
- 10:2010:20, 10 February 2020 diff hist +177 User:Vegard add sub-pages current
- 09:5209:52, 10 February 2020 diff hist +1,687 N Global variables new page
6 February 2020
- 21:1521:15, 6 February 2020 diff hist +6,152 N User:Vegard/Projects new page current
- 14:3414:34, 6 February 2020 diff hist 0 N File:sc2013 proceedings Nossum SHA1.pdf No edit summary current
4 February 2020
- 19:1819:18, 4 February 2020 diff hist +74 Rust safety No edit summary
- 19:1719:17, 4 February 2020 diff hist +450 N Rust safety new page
1 February 2020
- 09:1909:19, 1 February 2020 diff hist +127 N Rotor new page
31 January 2020
- 08:4708:47, 31 January 2020 diff hist 0 Thunk →Definition
- 07:4507:45, 31 January 2020 diff hist +2,224 N Thunk new page
29 January 2020
- 08:3608:36, 29 January 2020 diff hist +1 rustc fuzzing fix typo current
- 08:3108:31, 29 January 2020 diff hist +117 Pointer syntax function pointer
- 07:4207:42, 29 January 2020 diff hist +539 N Pointer syntax new page
28 January 2020
- 10:0310:03, 28 January 2020 diff hist +300 vegard.wiki:About/short No edit summary
- 10:0010:00, 28 January 2020 diff hist +368 Geometry snippets shortest distance from point to line current
- 09:3709:37, 28 January 2020 diff hist +785 N Geometry snippets new page
- 09:2409:24, 28 January 2020 diff hist +7 Normals →dFdx/dFdy
- 09:2409:24, 28 January 2020 diff hist +185 Normals →dFdx/dFdy
26 January 2020
- 22:2622:26, 26 January 2020 diff hist 0 N Category:Linear algebra new category current
- 22:2522:25, 26 January 2020 diff hist 0 N Category:Music theory new category current
- 22:2522:25, 26 January 2020 diff hist +144 N Enharmonic spelling new page
- 09:3909:39, 26 January 2020 diff hist +91 N Z buffer new page
25 January 2020
- 19:2719:27, 25 January 2020 diff hist +389 N Normals new page
22 January 2020
- 20:4620:46, 22 January 2020 diff hist +353 N Alpha to coverage new page current
- 18:0718:07, 22 January 2020 diff hist +153 Transformation matrix add link
18 January 2020
- 19:3119:31, 18 January 2020 diff hist +275 N The Witness new page
17 January 2020
- 09:0009:00, 17 January 2020 diff hist +1,116 N Transformation matrix new page
13 January 2020
- 11:4111:41, 13 January 2020 diff hist +686 N is constexpr() new page
3 January 2020
- 12:2912:29, 3 January 2020 diff hist +311 N Homogeneous coordinates new page
31 December 2019
- 21:3521:35, 31 December 2019 diff hist +211 Barycentric coordinates No edit summary
30 December 2019
- 22:4922:49, 30 December 2019 diff hist +6 OpenGL snippets →C++/libpng
- 21:5121:51, 30 December 2019 diff hist +1,901 OpenGL snippets C++/libpng
29 December 2019
- 13:4313:43, 29 December 2019 diff hist +119 Barycentric coordinates use glm
- 13:3613:36, 29 December 2019 diff hist +242 Barycentric coordinates No edit summary
- 13:3413:34, 29 December 2019 diff hist +685 N Barycentric coordinates new page
26 December 2019
- 07:2707:27, 26 December 2019 diff hist +312 N Angular distance new page
23 December 2019
- 21:0021:00, 23 December 2019 diff hist +131 inotify No edit summary current
- 20:5620:56, 23 December 2019 diff hist +395 N inotify new page
22 December 2019
- 10:1410:14, 22 December 2019 diff hist +558 N C preprocessor snippets new page
19 December 2019
- 11:2411:24, 19 December 2019 diff hist +59 vegard.wiki:About add logo/font info current
- 11:2411:24, 19 December 2019 diff hist +6 Main Page →About
- 11:2311:23, 19 December 2019 diff hist +73 N vegard.wiki:About/short new page
- 11:1811:18, 19 December 2019 diff hist −37 MediaWiki:Common.css No edit summary current
- 11:1711:17, 19 December 2019 diff hist +2 MediaWiki:Common.css No edit summary
- 11:1611:16, 19 December 2019 diff hist +85 N MediaWiki:Common.css Created page with "→CSS placed here will be applied to all skins: * { font-face: courier new; }"
- 10:3110:31, 19 December 2019 diff hist +169 Premultiplied alpha →Solution: gamma correction current
- 10:2710:27, 19 December 2019 diff hist +186 Gamma add alpha premultiplication