WebGLTransformFeedback.h (1925B)
1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 #ifndef WEBGL_TRANSFORM_FEEDBACK_H_ 7 #define WEBGL_TRANSFORM_FEEDBACK_H_ 8 9 #include "WebGLObjectModel.h" 10 #include "WebGLTypes.h" 11 12 namespace mozilla { 13 namespace webgl { 14 struct CachedDrawFetchLimits; 15 } 16 17 class WebGLTransformFeedback final : public WebGLContextBoundObject { 18 friend class ScopedDrawWithTransformFeedback; 19 friend class WebGLContext; 20 friend class WebGL2Context; 21 friend class WebGLProgram; 22 23 MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(WebGLTransformFeedback, override) 24 25 friend const webgl::CachedDrawFetchLimits* ValidateDraw(WebGLContext*, GLenum, 26 uint32_t); 27 28 public: 29 const GLuint mGLName; 30 bool mHasBeenBound = false; 31 32 private: 33 // GLES 3.0.4 p267, Table 6.24 "Transform Feedback State" 34 // It's not yet in the ES3 spec, but the generic TF buffer bind point has been 35 // moved to context state, instead of TFO state. 36 std::vector<IndexedBufferBinding> mIndexedBindings; 37 bool mIsPaused; 38 bool mIsActive; 39 // Not in state tables: 40 RefPtr<WebGLProgram> mActive_Program; 41 MOZ_INIT_OUTSIDE_CTOR GLenum mActive_PrimMode; 42 MOZ_INIT_OUTSIDE_CTOR size_t mActive_VertPosition; 43 MOZ_INIT_OUTSIDE_CTOR size_t mActive_VertCapacity; 44 45 public: 46 WebGLTransformFeedback(WebGLContext* webgl, GLuint tf); 47 48 private: 49 ~WebGLTransformFeedback() override; 50 51 public: 52 bool IsActiveAndNotPaused() const { return mIsActive && !mIsPaused; } 53 54 // GL Funcs 55 void BeginTransformFeedback(GLenum primMode); 56 void EndTransformFeedback(); 57 void PauseTransformFeedback(); 58 void ResumeTransformFeedback(); 59 }; 60 61 } // namespace mozilla 62 63 #endif // WEBGL_TRANSFORM_FEEDBACK_H_