Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/documentation/dxptexviewer.rst

@@ -0,0 +1,100 @@
+..  
+     Copyright 2013 Pixar
+  
+     Licensed under the terms set forth in the LICENSE.txt file available at
+     https://opensubdiv.org/license.
+  
+
+dxPtexViewer
+------------
+
+.. contents::
+   :local:
+   :backlinks: none
+
+SYNOPSIS
+========
+
+.. parsed-literal:: 
+   :class: codefhead
+
+   **dxPtexViewer** [**-f**] [**-yup**] [**-u**] [**-a**] [**-l** *isolation level*] [**-c** *animation loops*]
+       [**-e** *environment map*] [**-d** *HDR diffuse map*] [**-s** *HDR specular map*]
+       [**--disp** *displacement scale*]
+       *ptex color file*
+       *ptex displacement file*
+       *ptex occlusion file*
+       *ptex specular file*
+       *objfile(s)*
+
+DESCRIPTION
+===========
+
+``dxPtexViewer`` is a stand-alone application that showcases advanced HDR shading
+with color, displacement, occlusion and specular ptex maps. Multiple controls 
+are available to experiment with the algorithms.
+
+.. image:: images/dxptexviewer.png
+    :width: 400px
+    :align: center
+    :target: images/dxptexviewer.png
+
+
+
+OPTIONS
+=======
+
+See the description of the
+`common comand line options <code_examples.html#common-command-line-options>`__
+for the subset of common options supported here.
+
+**-y**
+  Swap Z-up geometry to Y-UP.
+
+**-e** *environment map*
+  A low dynamic range spherical environment map used as a background. Ideally,
+  a color-normalized version of the HDR light probe.
+
+**-d** *HDR diffuse map*
+  An HDR file containing a diffuse environment map (typically they are low
+  resolution blurry hemispherical convolutions of the environment light probe).
+
+**-s** *environment map*
+  An HDR file containing a specular environment map.
+
+**--disp** *displacement scale*
+  A scalar multiplier for the shader displacement values.
+
+*ptex color file*
+  A ptex file containing RGB channels read as material albedo color.
+  
+*ptex displacement file*
+  A single-channel ptex file (preferrably float precision) containing the 
+  displacement values.
+
+*ptex occlusion file*
+  A single-channel ptex file (preferrably 8 bits precision) containing a 
+  pre-computed ambient occlusion signal.
+
+*ptex specular file*
+  A single-channel ptex file (preferrably 8 bits precision) applied to modulate
+  the specular reflectance of the material
+  
+*objfile(s)*
+  A sequence of obj files used as an animation loop (the topology has to match
+  the data contained in all the ptex files !)
+
+
+KEYBOARD CONTROLS
+=================
+
+   .. code:: c++
+   
+      q      : quit
+      esc    : hide GUI
+      f      : fit frame
+      +/-    : increase / decrese tessellation rate
+
+
+
+.. include:: examples_see_also.rst