1 //
2 // Copyright 2015 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6 
7 // TransformFeedbackGL.h: Defines the class interface for TransformFeedbackGL.
8 
9 #ifndef LIBANGLE_RENDERER_GL_TRANSFORMFEEDBACKGL_H_
10 #define LIBANGLE_RENDERER_GL_TRANSFORMFEEDBACKGL_H_
11 
12 #include "libANGLE/renderer/TransformFeedbackImpl.h"
13 
14 namespace rx
15 {
16 
17 class FunctionsGL;
18 class StateManagerGL;
19 
20 class TransformFeedbackGL : public TransformFeedbackImpl
21 {
22   public:
23     TransformFeedbackGL(const gl::TransformFeedbackState &state,
24                         const FunctionsGL *functions,
25                         StateManagerGL *stateManager);
26     ~TransformFeedbackGL() override;
27 
28     angle::Result begin(const gl::Context *context, gl::PrimitiveMode primitiveMode) override;
29     angle::Result end(const gl::Context *context) override;
30     angle::Result pause(const gl::Context *context) override;
31     angle::Result resume(const gl::Context *context) override;
32 
33     angle::Result bindIndexedBuffer(const gl::Context *context,
34                                     size_t index,
35                                     const gl::OffsetBindingPointer<gl::Buffer> &binding) override;
36 
37     GLuint getTransformFeedbackID() const;
38 
39     void syncActiveState(const gl::Context *context,
40                          bool active,
41                          gl::PrimitiveMode primitiveMode) const;
42     void syncPausedState(bool paused) const;
43 
44   private:
45     const FunctionsGL *mFunctions;
46     StateManagerGL *mStateManager;
47 
48     GLuint mTransformFeedbackID;
49 
50     mutable bool mIsActive;
51     mutable bool mIsPaused;
52     mutable GLuint mActiveProgram;
53 };
54 }  // namespace rx
55 
56 #endif  // LIBANGLE_RENDERER_GL_TRANSFORMFEEDBACKGL_H_
57