La primitive de filtre SVG <feComposite> effectue la combinaison de deux images en entrée, pixel par pixel, en utilisant une des opérations de composition de Porter-Duff: over, in, atop, out, xor, et lighter. Il est également possible d'appliquer une opération de type arithmetic (avec un résultat borné entre [0..1]).
L'opération arithmetic est utile pour combiner le résultat de <feDiffuseLighting> et <feSpecularLighting> avec des textures. Si l'opération arithmetic est choisie, chaque pixel est calculé à l'aide de la formule suivante:
result = k1*i1*i2 + k2*i1 + k3*i2 + k4
où
Contexte d'utilisation
| Catégories | Élément de filtre |
|---|---|
| Contenu autorisé | Tout élément de cette liste, quel qu'en soit l'ordre:<animate>, <set> |
Attributs
Attributs globaux
Attributs spécifiques
Interface DOM
Cet élément implémente l'interface SVGFECompositeElement.
Exemple
SVG
<svg width="330" height="195" viewBox="0 0 1100 650" version="1.1"
xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<title>Example feComposite - Examples of feComposite operations</title>
<desc>Four rows of six pairs of overlapping triangles depicting
the six different feComposite operators under different
opacity values and different clearing of the background.</desc>
<defs>
<desc>Define two sets of six filters for each of the six compositing operators.
The first set wipes out the background image by flooding with opaque white.
The second set does not wipe out the background, with the result
that the background sometimes shines through and is other cases
is blended into itself (i.e., "double-counting").</desc>
<filter id="overFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feFlood flood-color="#ffffff" flood-opacity="1" result="flood"/>
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="over" result="comp"/>
<feMerge> <feMergeNode in="flood"/> <feMergeNode in="comp"/> </feMerge>
</filter>
<filter id="inFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feFlood flood-color="#ffffff" flood-opacity="1" result="flood"/>
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="in" result="comp"/>
<feMerge> <feMergeNode in="flood"/> <feMergeNode in="comp"/> </feMerge>
</filter>
<filter id="outFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feFlood flood-color="#ffffff" flood-opacity="1" result="flood"/>
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="out" result="comp"/>
<feMerge> <feMergeNode in="flood"/> <feMergeNode in="comp"/> </feMerge>
</filter>
<filter id="atopFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feFlood flood-color="#ffffff" flood-opacity="1" result="flood"/>
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="atop" result="comp"/>
<feMerge> <feMergeNode in="flood"/> <feMergeNode in="comp"/> </feMerge>
</filter>
<filter id="xorFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feFlood flood-color="#ffffff" flood-opacity="1" result="flood"/>
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="xor" result="comp"/>
<feMerge> <feMergeNode in="flood"/> <feMergeNode in="comp"/> </feMerge>
</filter>
<filter id="arithmeticFlood" filterUnits="objectBoundingBox"
x="-5%" y="-5%" width="110%" height="110%">
<feFlood flood-color="#ffffff" flood-opacity="1" result="flood"/>
<feComposite in="SourceGraphic" in2="BackgroundImage" result="comp"
operator="arithmetic" k1=".5" k2=".5" k3=".5" k4=".5"/>
<feMerge> <feMergeNode in="flood"/> <feMergeNode in="comp"/> </feMerge>
</filter>
<filter id="overNoFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="over" result="comp"/>
</filter>
<filter id="inNoFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="in" result="comp"/>
</filter>
<filter id="outNoFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="out" result="comp"/>
</filter>
<filter id="atopNoFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="atop" result="comp"/>
</filter>
<filter id="xorNoFlood" filterUnits="objectBoundingBox" x="-5%" y="-5%" width="110%" height="110%">
<feComposite in="SourceGraphic" in2="BackgroundImage" operator="xor" result="comp"/>
</filter>
<filter id="arithmeticNoFlood" filterUnits="objectBoundingBox"
x="-5%" y="-5%" width="110%" height="110%">
<feComposite in="SourceGraphic" in2="BackgroundImage" result="comp"
operator="arithmetic" k1=".5" k2=".5" k3=".5" k4=".5"/>
</filter>
<path id="Blue100" d="M 0 0 L 100 0 L 100 100 z" fill="#00ffff" />
<path id="Red100" d="M 0 0 L 0 100 L 100 0 z" fill="#ff00ff" />
<path id="Blue50" d="M 0 125 L 100 125 L 100 225 z" fill="#00ffff" fill-opacity=".5" />
<path id="Red50" d="M 0 125 L 0 225 L 100 125 z" fill="#ff00ff" fill-opacity=".5" />
<g id="TwoBlueTriangles">
<use xlink:href="#Blue100"/>
<use xlink:href="#Blue50"/>
</g>
<g id="BlueTriangles">
<use transform="translate(275,25)" xlink:href="#TwoBlueTriangles"/>
<use transform="translate(400,25)" xlink:href="#TwoBlueTriangles"/>
<use transform="translate(525,25)" xlink:href="#TwoBlueTriangles"/>
<use transform="translate(650,25)" xlink:href="#TwoBlueTriangles"/>
<use transform="translate(775,25)" xlink:href="#TwoBlueTriangles"/>
<use transform="translate(900,25)" xlink:href="#TwoBlueTriangles"/>
</g>
</defs>
<rect fill="none" stroke="blue" x="1" y="1" width="1098" height="648"/>
<g font-family="Verdana" font-size="40" shape-rendering="crispEdges">
<desc>Render the examples using the filters that draw on top of
an opaque white surface, thus obliterating the background.</desc>
<g enable-background="new">
<text x="15" y="75">opacity 1.0</text>
<text x="15" y="115" font-size="27">(with feFlood)</text>
<text x="15" y="200">opacity 0.5</text>
<text x="15" y="240" font-size="27">(with feFlood)</text>
<use xlink:href="#BlueTriangles"/>
<g transform="translate(275,25)">
<use xlink:href="#Red100" filter="url(#overFlood)" />
<use xlink:href="#Red50" filter="url(#overFlood)" />
<text x="5" y="275">over</text>
</g>
<g transform="translate(400,25)">
<use xlink:href="#Red100" filter="url(#inFlood)" />
<use xlink:href="#Red50" filter="url(#inFlood)" />
<text x="35" y="275">in</text>
</g>
<g transform="translate(525,25)">
<use xlink:href="#Red100" filter="url(#outFlood)" />
<use xlink:href="#Red50" filter="url(#outFlood)" />
<text x="15" y="275">out</text>
</g>
<g transform="translate(650,25)">
<use xlink:href="#Red100" filter="url(#atopFlood)" />
<use xlink:href="#Red50" filter="url(#atopFlood)" />
<text x="10" y="275">atop</text>
</g>
<g transform="translate(775,25)">
<use xlink:href="#Red100" filter="url(#xorFlood)" />
<use xlink:href="#Red50" filter="url(#xorFlood)" />
<text x="15" y="275">xor</text>
</g>
<g transform="translate(900,25)">
<use xlink:href="#Red100" filter="url(#arithmeticFlood)" />
<use xlink:href="#Red50" filter="url(#arithmeticFlood)" />
<text x="-25" y="275">arithmetic</text>
</g>
</g>
<g transform="translate(0,325)" enable-background="new">
<desc>Render the examples using the filters that do not obliterate
the background, thus sometimes causing the background to continue
to appear in some cases, and in other cases the background
image blends into itself ("double-counting").</desc>
<text x="15" y="75">opacity 1.0</text>
<text x="15" y="115" font-size="27">(without feFlood)</text>
<text x="15" y="200">opacity 0.5</text>
<text x="15" y="240" font-size="27">(without feFlood)</text>
<use xlink:href="#BlueTriangles"/>
<g transform="translate(275,25)">
<use xlink:href="#Red100" filter="url(#overNoFlood)" />
<use xlink:href="#Red50" filter="url(#overNoFlood)" />
<text x="5" y="275">over</text>
</g>
<g transform="translate(400,25)">
<use xlink:href="#Red100" filter="url(#inNoFlood)" />
<use xlink:href="#Red50" filter="url(#inNoFlood)" />
<text x="35" y="275">in</text>
</g>
<g transform="translate(525,25)">
<use xlink:href="#Red100" filter="url(#outNoFlood)" />
<use xlink:href="#Red50" filter="url(#outNoFlood)" />
<text x="15" y="275">out</text>
</g>
<g transform="translate(650,25)">
<use xlink:href="#Red100" filter="url(#atopNoFlood)" />
<use xlink:href="#Red50" filter="url(#atopNoFlood)" />
<text x="10" y="275">atop</text>
</g>
<g transform="translate(775,25)">
<use xlink:href="#Red100" filter="url(#xorNoFlood)" />
<use xlink:href="#Red50" filter="url(#xorNoFlood)" />
<text x="15" y="275">xor</text>
</g>
<g transform="translate(900,25)">
<use xlink:href="#Red100" filter="url(#arithmeticNoFlood)" />
<use xlink:href="#Red50" filter="url(#arithmeticNoFlood)" />
<text x="-25" y="275">arithmetic</text>
</g>
</g>
</g>
</svg>
Résultat
Cette image affine le résultat désiré.
Spécifications
| Spécification | Statut | Commentaire |
|---|---|---|
| Filter Effects Module Level 1 La définition de '<feComposite>' dans cette spécification. |
Version de travail | Ajoute la valeur lighter pour l'attribut operator. |
| Scalable Vector Graphics (SVG) 1.1 (Second Edition) La définition de '<feComposite>' dans cette spécification. |
Recommendation | Définition initiale |
Compatibilité des navigateurs
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Le tableau de compatibilité de cette page a été généré à partir de données structurées. Si vous souhaitez contribuer à ces données, n'hésitez pas à envoyer une pull request sur https://github.com/mdn/browser-compat-data.