mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
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109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
//
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// Copyright 2013 Pixar
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License
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// and the following modification to it: Section 6 Trademarks.
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// deleted and replaced with:
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//
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// 6. Trademarks. This License does not grant permission to use the
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// trade names, trademarks, service marks, or product names of the
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// Licensor and its affiliates, except as required for reproducing
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// the content of the NOTICE file.
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//
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific
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// language governing permissions and limitations under the
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// License.
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//
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#ifndef OSD_CL_GL_VERTEX_BUFFER_H
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#define OSD_CL_GL_VERTEX_BUFFER_H
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#include "../version.h"
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#include "../osd/opengl.h"
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#if defined(__APPLE__)
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#include <OpenCL/opencl.h>
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#else
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#include <CL/opencl.h>
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#endif
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namespace OpenSubdiv {
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namespace OPENSUBDIV_VERSION {
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///
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/// \brief Concrete vertex buffer class for OpenCL subvision and OpenGL drawing.
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///
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/// OsdCLGLVertexBuffer implements OsdCLVertexBufferInterface and
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/// OsdGLVertexBufferInterface.
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///
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/// The buffer interop between OpenCL and GL is handled automatically when a
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/// client calls BindCLBuffer and BindVBO methods.
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///
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class OsdCLGLVertexBuffer {
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public:
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/// Creator. Returns NULL if error.
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static OsdCLGLVertexBuffer * Create(int numElements,
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int numVertices,
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cl_context clContext);
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/// Destructor.
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~OsdCLGLVertexBuffer();
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/// This method is meant to be used in client code in order to provide coarse
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/// vertices data to Osd.
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void UpdateData(const float *src, int startVertex, int numVertices, cl_command_queue clQueue);
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/// Returns how many elements defined in this vertex buffer.
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int GetNumElements() const;
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/// Returns how many vertices allocated in this vertex buffer.
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int GetNumVertices() const;
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/// Returns the CL memory object. GL buffer will be mapped to CL memory
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/// space if necessary.
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cl_mem BindCLBuffer(cl_command_queue queue);
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/// Returns the GL buffer object. If the buffer is mapped to CL memory
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/// space, it will be unmapped back to GL.
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GLuint BindVBO();
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protected:
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/// Constructor.
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OsdCLGLVertexBuffer(int numElements, int numVertices, cl_context clContext);
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/// Allocates VBO for this buffer and register as a CL resource.
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/// Returns true if success.
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bool allocate(cl_context clContext);
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/// Acqures a resource from GL.
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void map(cl_command_queue queue);
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/// Releases a resource to GL.
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void unmap();
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private:
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int _numElements;
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int _numVertices;
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GLuint _vbo;
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cl_command_queue _clQueue;
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cl_mem _clMemory;
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bool _clMapped;
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};
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} // end namespace OPENSUBDIV_VERSION
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using namespace OPENSUBDIV_VERSION;
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} // end namespace OpenSubdiv
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#endif // OSD_CL_GL_VERTEX_BUFFER_H
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