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[Ajat/Albert] move s3 and cloudfront package into aws package and ref…
…actor storage.baseUrl to storage.baseURL
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| # Image Processor for Darkroom | ||
|
|
||
| #### About | ||
| This module holds the logic to process images. It is used by the Darkroom [Application Server](https://***REMOVED***/darkroom/core). | ||
| You may implement the `Processor` interface to gain custom functionality while still keeping other Darkroom functionality. | ||
|
|
||
| #### Interface | ||
| ```go | ||
| type Processor interface { | ||
| Crop(input []byte, width, height int, point CropPoint) ([]byte, error) | ||
| Resize(input []byte, width, height int) ([]byte, error) | ||
| Watermark(base []byte, overlay []byte, opacity uint8) ([]byte, error) | ||
| GrayScale(input []byte) ([]byte, error) | ||
| } | ||
| ``` | ||
| Any `struct` implementing the above interface can be used with Darkroom. | ||
|
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| #### Example | ||
|
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| ```go | ||
| bp := NewBildProcessor() | ||
| img, _ := ioutil.ReadFile("test.png") | ||
| output, err := bp.Resize(img, 500, 500) | ||
| _, _ := ioutil.WriteFile("output.png", output, 0644) | ||
| ``` |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| package processor | ||
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| type CropPoint int | ||
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| const ( | ||
| CropTopLeft CropPoint = 1 | ||
| CropTop CropPoint = 2 | ||
| CropTopRight CropPoint = 3 | ||
| CropLeft CropPoint = 4 | ||
| CropCenter CropPoint = 5 | ||
| CropRight CropPoint = 6 | ||
| CropBottomLeft CropPoint = 7 | ||
| CropBottom CropPoint = 8 | ||
| CropBottomRight CropPoint = 9 | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| package processor | ||
|
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| // Processor interface for performing operations on image | ||
| type Processor interface { | ||
| Crop(input []byte, width, height int, point CropPoint) ([]byte, error) | ||
| Resize(input []byte, width, height int) ([]byte, error) | ||
| Watermark(base []byte, overlay []byte, opacity uint8) ([]byte, error) | ||
| GrayScale(input []byte) ([]byte, error) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| package native | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "github.com/anthonynsimon/bild/clone" | ||
| "github.com/anthonynsimon/bild/effect" | ||
| "github.com/anthonynsimon/bild/transform" | ||
| "image" | ||
| "image/color" | ||
| "image/draw" | ||
| "image/jpeg" | ||
| "image/png" | ||
| "***REMOVED***/darkroom/core/pkg/processor" | ||
| ) | ||
|
|
||
| const ( | ||
| pngType = "png" | ||
| jpgType = "jpeg" | ||
| ) | ||
|
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| // BildProcessor uses bild library to process images using native Golang image.Image interface | ||
| type BildProcessor struct { | ||
| } | ||
|
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| func (bp *BildProcessor) Crop(input []byte, width, height int, point processor.CropPoint) ([]byte, error) { | ||
| img, f, err := image.Decode(bytes.NewReader(input)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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||
| w, h := getResizeWidthAndHeightForCrop(width, height, img.Bounds().Dx(), img.Bounds().Dy()) | ||
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| img = transform.Resize(img, w, h, transform.Linear) | ||
| x0, y0 := getStartingPointForCrop(w, h, width, height, point) | ||
| rect := image.Rect(x0, y0, width+x0, height+y0) | ||
| img = (clone.AsRGBA(img)).SubImage(rect) | ||
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| return bp.encode(img, f) | ||
| } | ||
|
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| func (bp *BildProcessor) Resize(input []byte, width, height int) ([]byte, error) { | ||
| img, f, err := image.Decode(bytes.NewReader(input)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| initW := img.Bounds().Dx() | ||
| initH := img.Bounds().Dy() | ||
|
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| w, h := getResizeWidthAndHeight(width, height, initW, initH) | ||
| if w != initW || h != initH { | ||
| img = transform.Resize(img, w, h, transform.Linear) | ||
| } | ||
|
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| return bp.encode(img, f) | ||
| } | ||
|
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| func (bp *BildProcessor) Watermark(base []byte, overlay []byte, opacity uint8) ([]byte, error) { | ||
| baseImg, f, err := image.Decode(bytes.NewReader(base)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| overlayImg, _, err := image.Decode(bytes.NewReader(overlay)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| ratio := float64(overlayImg.Bounds().Dy()) / float64(overlayImg.Bounds().Dx()) | ||
| dWidth := float64(baseImg.Bounds().Dx()) / 2.0 | ||
|
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| // Resizing overlay image according to base image | ||
| overlayImg = transform.Resize(overlayImg, int(dWidth), int(dWidth*ratio), transform.Linear) | ||
|
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| // Anchor point for overlaying | ||
| x := (baseImg.Bounds().Dx() - overlayImg.Bounds().Dx()) / 2 | ||
| y := (baseImg.Bounds().Dy() - overlayImg.Bounds().Dy()) / 2 | ||
| offset := image.Pt(int(x), int(y)) | ||
|
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| // Mask image (that is just a solid light gray image) | ||
| mask := image.NewUniform(color.Alpha{A: opacity}) | ||
|
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| // Performing overlay | ||
| draw.DrawMask(baseImg.(draw.Image), overlayImg.Bounds().Add(offset), overlayImg, image.ZP, mask, image.ZP, draw.Over) | ||
|
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| return bp.encode(baseImg, f) | ||
| } | ||
|
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| func (bp *BildProcessor) GrayScale(input []byte) ([]byte, error) { | ||
| img, f, err := image.Decode(bytes.NewReader(input)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| img = effect.Grayscale(img) | ||
| return bp.encode(img, f) | ||
| } | ||
|
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| func (bp *BildProcessor) encode(img image.Image, format string) ([]byte, error) { | ||
| if format == pngType && isOpaque(img) { | ||
| format = jpgType | ||
| } | ||
| buff := &bytes.Buffer{} | ||
| var err error | ||
| if format == pngType { | ||
| enc := png.Encoder{CompressionLevel: png.BestCompression} | ||
| err = enc.Encode(buff, img) | ||
| } else { | ||
| err = jpeg.Encode(buff, img, nil) | ||
| } | ||
| return buff.Bytes(), err | ||
| } | ||
|
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||
| func NewBildProcessor() *BildProcessor { | ||
| return &BildProcessor{} | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package native | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/suite" | ||
| "image" | ||
| "io/ioutil" | ||
| "***REMOVED***/darkroom/core/pkg/processor" | ||
| "testing" | ||
| ) | ||
|
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| type BildProcessorSuite struct { | ||
| suite.Suite | ||
| srcData []byte | ||
| watermarkData []byte | ||
| badData []byte | ||
| processor processor.Processor | ||
| } | ||
|
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| func (s *BildProcessorSuite) SetupSuite() { | ||
| s.processor = NewBildProcessor() | ||
| s.srcData, _ = ioutil.ReadFile("test.png") | ||
| s.watermarkData, _ = ioutil.ReadFile("overlay.png") | ||
| s.badData = []byte("badImage.ext") | ||
| } | ||
|
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| func TestNewBildProcessor(t *testing.T) { | ||
| suite.Run(t, new(BildProcessorSuite)) | ||
| } | ||
|
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| func (s *BildProcessorSuite) TestBildProcessor_Resize() { | ||
| output, err := s.processor.Resize(s.srcData, 500, 500) | ||
|
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| assert.NotNil(s.T(), output) | ||
| assert.Nil(s.T(), err) | ||
|
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| img, _, _ := image.Decode(bytes.NewReader(output)) | ||
| assert.Equal(s.T(), 500, img.Bounds().Dx()) | ||
| assert.Equal(s.T(), 375, img.Bounds().Dy()) | ||
| } | ||
|
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| func (s *BildProcessorSuite) TestBildProcessor_Crop() { | ||
| output, err := s.processor.Crop(s.srcData, 500, 500, processor.CropCenter) | ||
|
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| assert.NotNil(s.T(), output) | ||
| assert.Nil(s.T(), err) | ||
|
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| img, _, _ := image.Decode(bytes.NewReader(output)) | ||
| assert.Equal(s.T(), 500, img.Bounds().Dx()) | ||
| assert.Equal(s.T(), 500, img.Bounds().Dy()) | ||
| } | ||
|
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| func (s *BildProcessorSuite) TestBildProcessor_Grayscale() { | ||
| output, err := s.processor.GrayScale(s.srcData) | ||
|
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| assert.NotNil(s.T(), output) | ||
| assert.Nil(s.T(), err) | ||
| assert.NotEqual(s.T(), s.srcData, output) | ||
| } | ||
|
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| func (s *BildProcessorSuite) TestBildProcessor_Watermark() { | ||
| output, err := s.processor.Watermark(s.srcData, s.watermarkData, 200) | ||
|
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| assert.NotNil(s.T(), output) | ||
| assert.Nil(s.T(), err) | ||
|
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| assert.NotEqual(s.T(), s.srcData, output) | ||
| } | ||
|
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| func (s *BildProcessorSuite) TestBildProcessorWithBadInput() { | ||
| output, err := s.processor.Crop(s.badData, 0, 0, processor.CropCenter) | ||
| assert.NotNil(s.T(), err) | ||
| assert.Nil(s.T(), output) | ||
|
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| output, err = s.processor.Resize(s.badData, 0, 0) | ||
| assert.NotNil(s.T(), err) | ||
| assert.Nil(s.T(), output) | ||
|
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| output, err = s.processor.GrayScale(s.badData) | ||
| assert.NotNil(s.T(), err) | ||
| assert.Nil(s.T(), output) | ||
|
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| output, err = s.processor.Watermark(s.badData, s.watermarkData, 255) | ||
| assert.NotNil(s.T(), err) | ||
| assert.Nil(s.T(), output) | ||
|
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| output, err = s.processor.Watermark(s.srcData, s.badData, 255) | ||
| assert.NotNil(s.T(), err) | ||
| assert.Nil(s.T(), output) | ||
| } |
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