8 Commits

Author	SHA1	Message	Date
Nigel Tao	013424077b	go.image/riff: new package. ... Also update package webp to use package riff. LGTM=r R=r CC=golang-codereviews, pascal.massimino https://golang.org/cl/162850043	2014-10-23 08:59:14 +11:00
Nigel Tao	ef5e0288ce	go.image/webp: implement lossy-with-alpha. ... This fixes all three lossy_alpha*.webp conformance tests. The test data was generated by cwebp/dwebp version 0.4.1: cwebp yellow_rose.png -o yellow_rose.lossy-with-alpha.webp dwebp yellow_rose.lossy-with-alpha.webp -pgm -o tmp.pgm convert tmp.pgm yellow_rose.lossy-with-alpha.webp.nycbcra.png LGTM=pascal.massimino, r R=r, pascal.massimino CC=golang-codereviews https://golang.org/cl/154350043	2014-10-20 10:46:12 +11:00
Nigel Tao	d354b8dda9	go.image/webp/nycbcra: new package. ... LGTM=r R=r CC=golang-codereviews https://golang.org/cl/147500043	2014-10-08 14:30:35 +11:00
Nigel Tao	07fcf9c2fe	vp8: skip filtering for all-zero-DC macroblock residuals. ... This makes the Go code match the libwebp C code's output on blue-purple-pink-large.*-filter.lossy.webp Also make the various WEBP benchmarks all decode a similar image, the image at http://blog.golang.org/gophercon/image01.jpg, to make it more meaningful to e.g. compare the simple filter's numbers with the normal filter's numbers. Also fix a "go vet" warning in webp/decode.go. The test data was generated by: wget http://blog.golang.org/gophercon/image01.jpg -O blue-purple-pink-large.jpeg convert blue-purple-pink-large.jpeg blue-purple-pink-large.png cwebp -lossless blue-purple-pink-large.png -o blue-purple-pink-large.lossless.webp cwebp -q 80 -f 0 blue-purple-pink-large.png -o blue-purple-pink-large.no-filter.lossy.webp cwebp -q 80 -strong blue-purple-pink-large.png -o blue-purple-pink-large.normal-filter.lossy.webp cwebp -q 80 -nostrong blue-purple-pink-large.png -o blue-purple-pink-large.simple-filter.lossy.webp dwebp -pgm blue-purple-pink-large.no-filter.lossy.webp -o tmp.pgm && convert tmp.pgm blue-purple-pink-large.no-filter.lossy.webp.ycbcr.png && rm tmp.pgm dwebp -pgm blue-purple-pink-large.normal-filter.lossy.webp -o tmp.pgm && convert tmp.pgm blue-purple-pink-large.normal-filter.lossy.webp.ycbcr.png && rm tmp.pgm dwebp -pgm blue-purple-pink-large.simple-filter.lossy.webp -o tmp.pgm && convert tmp.pgm blue-purple-pink-large.simple-filter.lossy.webp.ycbcr.png && rm tmp.pgm LGTM=r R=r CC=golang-codereviews https://golang.org/cl/106230044	2014-06-30 10:36:25 +10:00
Nigel Tao	0424e74a0e	go.image/vp8: implement the normal filter. ... The testdata was generated via: cwebp foo.png -o foo.lossy.webp dwebp -pgm foo.lossy.webp -o tmp.pgm convert tmp.pgm foo.lossy.webp.ycbcr.png rm tmp.pgm TBR=r R=r CC=golang-codereviews https://golang.org/cl/107330043	2014-06-26 13:29:30 +10:00
Nigel Tao	94ba43c478	go.image/vp8l: new package. ... The blue-purple-pink image comes from http://blog.golang.org/gophercon The tux and yellow_rose images come from https://developers.google.com/speed/webp/gallery2 and according to that page, those images are in the public domain. The gopher-doc images are http://golang.org/doc/gopher/doc.png after quantizing its palette to 2/4/16/256 colors. LGTM=r R=r CC=golang-codereviews https://golang.org/cl/109010043	2014-06-17 21:51:57 +10:00
Nigel Tao	72be9c51b1	go.image/vp8: implement the loop filter. ... The testdata files were created by: cwebp video-001.png -o video-001.webp dwebp -pgm video-001.webp -o tmp.pgm convert tmp.pgm video-001.webp.ycbcr.png rm tmp.pgm LGTM=r R=r CC=chaishushan, golang-codereviews https://golang.org/cl/91700044	2014-05-27 10:52:02 +10:00
Nigel Tao	f93749e6f2	go.image/vp8, go.image/webp: new packages, copied from ... code.google.com/p/vp8-go This is a straight copy, followed by import path updates. LGTM=r R=r, mirtchovski, oleku.konko CC=golang-codereviews https://golang.org/cl/79320043	2014-03-25 13:29:48 +11:00