1 //
2 // Copyright 2016 Pixar
3 //
4 // Licensed under the Apache License, Version 2.0 (the "Apache License")
5 // with the following modification; you may not use this file except in
6 // compliance with the Apache License and the following modification to it:
7 // Section 6. Trademarks. is deleted and replaced with:
8 //
9 // 6. Trademarks. This License does not grant permission to use the trade
10 //    names, trademarks, service marks, or product names of the Licensor
11 //    and its affiliates, except as required to comply with Section 4(c) of
12 //    the License and to reproduce the content of the NOTICE file.
13 //
14 // You may obtain a copy of the Apache License at
15 //
16 //     http://www.apache.org/licenses/LICENSE-2.0
17 //
18 // Unless required by applicable law or agreed to in writing, software
19 // distributed under the Apache License with the above modification is
20 // distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
21 // KIND, either express or implied. See the Apache License for the specific
22 // language governing permissions and limitations under the Apache License.
23 //
24 #ifndef PXR_IMAGING_HD_ST_FALLBACK_LIGHTING_SHADER_H
25 #define PXR_IMAGING_HD_ST_FALLBACK_LIGHTING_SHADER_H
26 
27 #include "pxr/pxr.h"
28 #include "pxr/imaging/hdSt/api.h"
29 #include "pxr/imaging/hdSt/lightingShader.h"
30 
31 #include "pxr/base/gf/vec4d.h"
32 
33 #include <memory>
34 
35 PXR_NAMESPACE_OPEN_SCOPE
36 
37 class HioGlslfx;
38 
39 /// \class HdSt_FallbackLightingShader
40 ///
41 /// A shader that provides fallback lighting behavior.
42 ///
43 class HdSt_FallbackLightingShader : public HdStLightingShader
44 {
45 public:
46     HDST_API
47     HdSt_FallbackLightingShader();
48     HDST_API
49     ~HdSt_FallbackLightingShader() override;
50 
51     // HdStShaderCode overrides
52     HDST_API
53     ID ComputeHash() const override;
54     HDST_API
55     std::string GetSource(TfToken const &shaderStageKey) const override;
56     HDST_API
57     void BindResources(int program,
58                        HdSt_ResourceBinder const &binder,
59                        HdRenderPassState const &state) override;
60     HDST_API
61     void UnbindResources(int program,
62                          HdSt_ResourceBinder const &binder,
63                          HdRenderPassState const &state) override;
64     HDST_API
65     void AddBindings(HdBindingRequestVector *customBindings) override;
66 
67     // HdStLightingShader overrides
68     HDST_API
69     void SetCamera(GfMatrix4d const &worldToViewMatrix,
70                    GfMatrix4d const &projectionMatrix) override;
71 
72 private:
73     std::unique_ptr<HioGlslfx> _glslfx;
74 };
75 
76 
77 PXR_NAMESPACE_CLOSE_SCOPE
78 
79 #endif // PXR_IMAGING_HD_ST_FALLBACK_LIGHTING_SHADER_H
80