kc3-lang/angle/src/libANGLE/TransformFeedback.h

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• Author : Geoff Lang
  Date : 2016-07-15 13:01:24
  Hash : 73bd218e
  Message : Support virtualized contexts and transform feedback in Renderer11. Track buffer offets in the transform feedback object and dirty them when a buffer is bound. This fixes problems when a buffer is rebound at the same offset and maintains tracking between context switches. BUG=angleproject:1447 BUG=angleproject:1298 Change-Id: I2f890e3ad5edacab47f624a95a502615c86cc0c8 Reviewed-on: https://chromium-review.googlesource.com/360910 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>

• src/libANGLE/TransformFeedback.h

• //
  // Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #ifndef LIBANGLE_TRANSFORM_FEEDBACK_H_
  #define LIBANGLE_TRANSFORM_FEEDBACK_H_
  
  #include "libANGLE/RefCountObject.h"
  
  #include "common/angleutils.h"
  #include "libANGLE/Debug.h"
  
  #include "angle_gl.h"
  
  namespace rx
  {
  class GLImplFactory;
  class TransformFeedbackImpl;
  }
  
  namespace gl
  {
  class Buffer;
  struct Caps;
  class Program;
  
  class TransformFeedbackState final : public angle::NonCopyable
  {
    public:
      TransformFeedbackState(size_t maxIndexedBuffers);
  
      const BindingPointer<Buffer> &getGenericBuffer() const;
      const OffsetBindingPointer<Buffer> &getIndexedBuffer(size_t idx) const;
      const std::vector<OffsetBindingPointer<Buffer>> &getIndexedBuffers() const;
  
    private:
      friend class TransformFeedback;
  
      std::string mLabel;
  
      bool mActive;
      GLenum mPrimitiveMode;
      bool mPaused;
  
      Program *mProgram;
  
      BindingPointer<Buffer> mGenericBuffer;
      std::vector<OffsetBindingPointer<Buffer>> mIndexedBuffers;
  };
  
  class TransformFeedback final : public RefCountObject, public LabeledObject
  {
    public:
      TransformFeedback(rx::GLImplFactory *implFactory, GLuint id, const Caps &caps);
      virtual ~TransformFeedback();
  
      void setLabel(const std::string &label) override;
      const std::string &getLabel() const override;
  
      void begin(GLenum primitiveMode, Program *program);
      void end();
      void pause();
      void resume();
  
      bool isActive() const;
      bool isPaused() const;
      GLenum getPrimitiveMode() const;
  
      bool hasBoundProgram(GLuint program) const;
  
      void bindGenericBuffer(Buffer *buffer);
      const BindingPointer<Buffer> &getGenericBuffer() const;
  
      void bindIndexedBuffer(size_t index, Buffer *buffer, size_t offset, size_t size);
      const OffsetBindingPointer<Buffer> &getIndexedBuffer(size_t index) const;
      size_t getIndexedBufferCount() const;
  
      void detachBuffer(GLuint bufferName);
  
      rx::TransformFeedbackImpl *getImplementation();
      const rx::TransformFeedbackImpl *getImplementation() const;
  
    private:
      void bindProgram(Program *program);
  
      TransformFeedbackState mState;
      rx::TransformFeedbackImpl* mImplementation;
  };
  
  }
  
  #endif // LIBANGLE_TRANSFORM_FEEDBACK_H_