示例#1
0
func generateMosaic(tag string, in image.Image, m *mosaicRecord) {

	// First build a color palette.
	log.Printf("Mosaic[%s] Create Palette...", m.ID)
	p := mosaic.NewImagePalette(paletteSize)
	if err := thumbs.PopulatePalette(tag, p); err != nil {
		log.Printf("Failed to populate palette: %s", err)
		if err := mosaics.SetStatus(m.ID, MosaicStatusFailed); err != nil {
			log.Printf("Failed to set mosaic failed: %s", err)
		}
		return
	}
	log.Printf("Mosaic[%s] Create Palette Done with %d colors, %d images.", m.ID, p.NumColors(), p.NumImages())

	// Update that the mosaic is being worked on.
	if err := mosaics.SetStatus(m.ID, MosaicStatusWorking); err != nil {
		log.Printf("Failed to set working status: %s", err)
		return
	}

	// Generate the mosaic.
	log.Printf("Mosaic[%s] Compose...", m.ID)
	out := mosaic.ComposeSquare(in, Units, UnitSize, p)
	log.Printf("Mosaic[%s] Compose Done.", m.ID)

	// Store the image and update the the mosaic is done.
	if err := mosaics.StoreImage(m.ID, out); err != nil {
		log.Printf("Failed to store mosaic image: %s", err)
		return
	}
	if err := mosaics.SetStatus(m.ID, MosaicStatusCreated); err != nil {
		log.Printf("Failed to set mosaic created: %s", err)
		return
	}
}
示例#2
0
func generateMosaic(src image.Image, tag string, units int, solid bool, inv *mosaic.ImageInventory) (image.Image, error) {
	var p *mosaic.ImagePalette
	if solid {
		p = mosaic.NewSolidPalette(palette.WebSafe)
		log.Printf("Generating %dx%d solid mosaic with %d colors", units, units, p.NumColors())
	} else {
		p = mosaic.NewImagePalette(paletteSize)
		if err := inv.PopulatePalette(p); err != nil {
			return nil, err
		}
		if p.NumColors() == 0 {
			return nil, fmt.Errorf("No images are available")
		}
		log.Printf("Generating %dx%d %s mosaic with %d colors and %d images\n", units, units, tag, p.NumColors(), p.NumImages())
	}
	sq := mosaic.ComposeSquare(src, units, unitSize, p)
	return mosaic.Shrink(sq, outDownsample), nil
}