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Jan 15, 2021
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Texture size attributes #241

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68697ec
Merge pull request #51 from immersive-web/main
cabanier Jan 15, 2021
769c0fe
Added support to XRProjectionLayer to return width/height/depth of it…
cabanier Jan 15, 2021
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Added support to XRProjectionLayer to return width/height/depth of it… 
…s internal texture
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@cabanier
cabanier committed Jan 15, 2021
commit 769c0fe153df11a4ba48d464840f5ab0c8c0b129
19 changes: 17 additions & 2 deletions webxrlayers-1.bs
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Expand Up @@ -440,10 +440,25 @@ Projection layers should be refreshed close to the device's native frame rate.

<pre class="idl">
[Exposed=Window] interface XRProjectionLayer : XRCompositionLayer {
readonly attribute unsigned long textureWidth;
readonly attribute unsigned long textureHeight;
readonly attribute unsigned long textureLayers;

readonly attribute boolean ignoreDepthValues;
};
</pre>

The <dfn attribute for="XRProjectionLayer">textureWidth</dfn> attribute returns the width in pixels of
the [=colorTextures=] textures of this layer.

The <dfn attribute for="XRProjectionLayer">textureHeight</dfn> attribute returns the height in pixels of
the [=colorTextures=] textures of this layer.

The <dfn attribute for="XRProjectionLayer">textureLayers</dfn> attribute returns the number of layers of
the [=colorTextures=] textures of this layer if the {{XRProjectionLayer}} was initialized with a
{{XRProjectionLayerInit/textureType}} of {{"texture-array"}}. Otherwise it will return <code>1</code>.


The <dfn attribute for="XRProjectionLayer">ignoreDepthValues</dfn> attribute, if <code>true</code>, indicates that the
[=XR Compositor=] MUST NOT make use of values in the depth buffer attachment when rendering. When the attribute
is <code>false</code> it indicates that the content of the depth buffer attachment will be used by the
Expand Down Expand Up @@ -1110,8 +1125,8 @@ To <dfn>allocate color textures for projection layers</dfn> using an {{XRProject
<dd> Return |array| and abort these steps.
</dl>
1. If the session’s [=view|views=] in the [=list of views=] don't all have the same [=recommended WebGL texture resolution=] excluding the [=secondary view|secondary views=], throw a {{NotSupportedError}} and abort these steps.
1. If |layer|'s {{XRCompositionLayer/layout}} is {{XRLayerLayout/stereo-left-right}}, initialize |array| with 1 [=new=] instance of [=opaque texture}} in the [=relevant realm=] of |context| created as a |textureType| texture using |context| , |textureFormat|, |numViews| multiplied by |width| and |height|.
1. If |layer|'s {{XRCompositionLayer/layout}} is {{XRLayerLayout/stereo-top-bottom}}, initialize |array| with 1 [=new=] instance of [=opaque texture}} in the [=relevant realm=] of |context| created as a |textureType| texture using |context| , |textureFormat|, |width| and |numViews| multiplied by |height|.
1. If |layer|'s {{XRCompositionLayer/layout}} is {{XRLayerLayout/stereo-left-right}}, initialize |array| with 1 [=new=] instance of [=opaque texture=] in the [=relevant realm=] of |context| created as a |textureType| texture using |context| , |textureFormat|, |numViews| multiplied by |width| and |height|.
1. If |layer|'s {{XRCompositionLayer/layout}} is {{XRLayerLayout/stereo-top-bottom}}, initialize |array| with 1 [=new=] instance of [=opaque texture=] in the [=relevant realm=] of |context| created as a |textureType| texture using |context| , |textureFormat|, |width| and |numViews| multiplied by |height|.
1. return |array|.

</div>
Expand Down