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Add animated GIF support

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Note that this is for GIFs only (and not Webp).

Fixes #5030
This commit is contained in:
Bjørn Erik Pedersen
2022-06-11 18:52:55 +02:00
parent 2e1c81770a
commit cf12fa6161
6 changed files with 104 additions and 26 deletions
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74
resources/image_test.go
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@@ -16,6 +16,7 @@ package resources
import (
"fmt"
"image"
"image/gif"
"io/ioutil"
"math/big"
"math/rand"
@@ -24,6 +25,7 @@ import (
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
"testing"
"time"
@@ -641,7 +643,7 @@ func TestImageOperationsGolden(t *testing.T) {
resized, err := orig.Resize(resizeSpec)
c.Assert(err, qt.IsNil)
rel := resized.RelPermalink()
c.Log("resize", rel)
c.Assert(rel, qt.Not(qt.Equals), "")
}
}
@@ -652,7 +654,15 @@ func TestImageOperationsGolden(t *testing.T) {
resized, err := orig.Resize(resizeSpec)
c.Assert(err, qt.IsNil)
rel := resized.RelPermalink()
c.Log("resize", rel)
c.Assert(rel, qt.Not(qt.Equals), "")
}
// Animated GIF
orig = fetchImageForSpec(spec, c, "giphy.gif")
for _, resizeSpec := range []string{"200x", "512x"} {
resized, err := orig.Resize(resizeSpec)
c.Assert(err, qt.IsNil)
rel := resized.RelPermalink()
c.Assert(rel, qt.Not(qt.Equals), "")
}
@@ -663,7 +673,6 @@ func TestImageOperationsGolden(t *testing.T) {
resized, err := orig.Resize(resizeSpec)
c.Assert(err, qt.IsNil)
rel := resized.RelPermalink()
c.Log("resize", rel)
c.Assert(rel, qt.Not(qt.Equals), "")
}
@@ -671,7 +680,6 @@ func TestImageOperationsGolden(t *testing.T) {
resized, err := orig.Fill(fillSpec)
c.Assert(err, qt.IsNil)
rel := resized.RelPermalink()
c.Log("fill", rel)
c.Assert(rel, qt.Not(qt.Equals), "")
}
@@ -679,7 +687,6 @@ func TestImageOperationsGolden(t *testing.T) {
resized, err := orig.Fit(fitSpec)
c.Assert(err, qt.IsNil)
rel := resized.RelPermalink()
c.Log("fit", rel)
c.Assert(rel, qt.Not(qt.Equals), "")
}
@@ -713,14 +720,12 @@ func TestImageOperationsGolden(t *testing.T) {
resized, err := resized.Filter(filter)
c.Assert(err, qt.IsNil)
rel := resized.RelPermalink()
c.Logf("filter: %v %s", filter, rel)
c.Assert(rel, qt.Not(qt.Equals), "")
}
resized, err = resized.Filter(filters[0:4])
c.Assert(err, qt.IsNil)
rel := resized.RelPermalink()
c.Log("filter all", rel)
c.Assert(rel, qt.Not(qt.Equals), "")
}
@@ -753,24 +758,47 @@ func assetGoldenDirs(c *qt.C, dir1, dir2 string) {
f2, err := os.Open(filepath.Join(dir2, fi2.Name()))
c.Assert(err, qt.IsNil)
img1, _, err := image.Decode(f1)
c.Assert(err, qt.IsNil)
img2, _, err := image.Decode(f2)
c.Assert(err, qt.IsNil)
decodeAll := func(f *os.File) []image.Image {
var images []image.Image
nrgba1 := image.NewNRGBA(img1.Bounds())
gift.New().Draw(nrgba1, img1)
nrgba2 := image.NewNRGBA(img2.Bounds())
gift.New().Draw(nrgba2, img2)
if strings.HasSuffix(f.Name(), ".gif") {
gif, err := gif.DecodeAll(f)
c.Assert(err, qt.IsNil)
images = make([]image.Image, len(gif.Image))
for i, img := range gif.Image {
images[i] = img
}
} else {
img, _, err := image.Decode(f)
c.Assert(err, qt.IsNil)
images = append(images, img)
}
return images
}
if !goldenEqual(nrgba1, nrgba2) {
switch fi1.Name() {
case "gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_73c19c5f80881858a85aa23cd0ca400d.png",
"gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_ae631e5252bb5d7b92bc766ad1a89069.png",
"gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_d1bbfa2629bffb90118cacce3fcfb924.png":
c.Log("expectedly differs from golden due to dithering:", fi1.Name())
default:
c.Errorf("resulting image differs from golden: %s", fi1.Name())
imgs1 := decodeAll(f1)
imgs2 := decodeAll(f2)
c.Assert(len(imgs1), qt.Equals, len(imgs2))
LOOP:
for i, img1 := range imgs1 {
img2 := imgs2[i]
nrgba1 := image.NewNRGBA(img1.Bounds())
gift.New().Draw(nrgba1, img1)
nrgba2 := image.NewNRGBA(img2.Bounds())
gift.New().Draw(nrgba2, img2)
if !goldenEqual(nrgba1, nrgba2) {
switch fi1.Name() {
case "gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_73c19c5f80881858a85aa23cd0ca400d.png",
"gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_ae631e5252bb5d7b92bc766ad1a89069.png",
"gohugoio8_hu7f72c00afdf7634587afaa5eff2a25b2_73538_d1bbfa2629bffb90118cacce3fcfb924.png",
"giphy_hu3eafc418e52414ace6236bf1d31f82e1_52213_200x0_resize_box.gif":
c.Log("expectedly differs from golden due to dithering:", fi1.Name())
default:
c.Errorf("resulting image differs from golden: %s", fi1.Name())
break LOOP
}
}
}