Fix Python test

Author: Yiyun Wang

docs/api/python/frozen/pyopencolorio_gpushaderdesc.rst

@@ -477,6 +477,8 @@
    .. py:property:: Texture3D.interpolation
       :module: PyOpenColorIO.GpuShaderDesc
 
+   .. py:property:: Texture3D.channel
+      :module: PyOpenColorIO.GpuShaderDesc
 
    .. py:property:: Texture3D.samplerName
       :module: PyOpenColorIO.GpuShaderDesc

src/bindings/python/PyGpuShaderDesc.cpp

@@ -38,6 +38,7 @@ struct Texture3D
     std::string m_textureName;
     std::string m_samplerName;
     unsigned m_edgelen;
+    GpuShaderDesc::TextureType m_channel;
     Interpolation m_interpolation;
     GpuShaderDescRcPtr m_shaderDesc;
     int m_index;
@@ -331,6 +332,7 @@ void bindPyGpuShaderDesc(py::module & m)
         .def_readonly("textureName", &Texture3D::m_textureName)
         .def_readonly("samplerName", &Texture3D::m_samplerName)
         .def_readonly("edgeLen", &Texture3D::m_edgelen)
+        .def_readonly("channel", &Texture3D::m_channel)
         .def_readonly("interpolation", &Texture3D::m_interpolation)
         .def("getValues", [](Texture3D & self)
             {
@@ -362,7 +364,7 @@ void bindPyGpuShaderDesc(py::module & m)
                 Interpolation interpolation;
                 it.m_obj->get3DTexture(i, textureName, samplerName, edgelen, channel, interpolation);
 
-                return { textureName, samplerName, edgelen, interpolation, it.m_obj, i };
+                return { textureName, samplerName, edgelen, channel, interpolation, it.m_obj, i };
             })
         .def("__iter__", [](Texture3DIterator & it) -> Texture3DIterator & 
             { 
@@ -379,7 +381,7 @@ void bindPyGpuShaderDesc(py::module & m)
                 Interpolation interpolation;
                 it.m_obj->get3DTexture(i, textureName, samplerName, edgelen, channel, interpolation);
 
-                return { textureName, samplerName, edgelen, interpolation, it.m_obj, i };
+                return { textureName, samplerName, edgelen, channel, interpolation, it.m_obj, i };
             });
 }
 

tests/python/GpuShaderDescTest.py

@@ -184,11 +184,11 @@ def test_texture_3d(self):
         buf = np.linspace(0, 1, num=8*3).astype(np.float32)
         bufTest1 = buf[3]
         desc.add3DTexture('tex', 'sampler', 2,
-                          OCIO.INTERP_DEFAULT, buf)
+                          OCIO.GpuShaderDesc.TEXTURE_RGB_CHANNEL, OCIO.INTERP_DEFAULT, buf)
         buf = np.linspace(0, 1, num=27*3).astype(np.float32)
         bufTest2 = buf[42]
         desc.add3DTexture('tex2', 'sampler2', 3,
-                          OCIO.INTERP_DEFAULT, buf)
+                          OCIO.GpuShaderDesc.TEXTURE_RGB_CHANNEL, OCIO.INTERP_DEFAULT, buf)
 
         textures = desc.get3DTextures()
         self.assertEqual(len(textures), 2)
@@ -197,6 +197,7 @@ def test_texture_3d(self):
         self.assertEqual(t1.samplerName, 'sampler')
         self.assertEqual(t1.edgeLen, 2)
         self.assertEqual(t1.interpolation, OCIO.INTERP_DEFAULT)
+        self.assertEqual(t1.channel, OCIO.GpuShaderDesc.TEXTURE_RGB_CHANNEL)
         v1 = t1.getValues()
         self.assertEqual(len(v1), 3*8)
         self.assertEqual(v1[3], bufTest1)
@@ -205,6 +206,7 @@ def test_texture_3d(self):
         self.assertEqual(t2.samplerName, 'sampler2')
         self.assertEqual(t2.edgeLen, 3)
         self.assertEqual(t2.interpolation, OCIO.INTERP_DEFAULT)
+        self.assertEqual(t2.channel, OCIO.GpuShaderDesc.TEXTURE_RGB_CHANNEL)
         v2 = t2.getValues()
         self.assertEqual(len(v2), 3*27)
         self.assertEqual(v2[42], bufTest2)