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Copyright 2013 Pixar
Licensed under the Apache License, Version 2.0 (the "Apache License")
with the following modification; you may not use this file except in
compliance with the Apache License and the following modification to it:
Section 6. Trademarks. is deleted and replaced with:
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor
and its affiliates, except as required to comply with Section 4(c) of
the License and to reproduce the content of the NOTICE file.
You may obtain a copy of the Apache License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the Apache License with the above modification is
distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the Apache License for the specific
language governing permissions and limitations under the Apache License.
91 lines
2.8 KiB
C++
91 lines
2.8 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 "Apache License")
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// with the following modification; you may not use this file except in
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// compliance with the Apache License and the following modification to it:
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// Section 6. Trademarks. is deleted and replaced with:
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//
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// 6. Trademarks. This License does not grant permission to use the trade
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// names, trademarks, service marks, or product names of the Licensor
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// and its affiliates, except as required to comply with Section 4(c) of
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// the License and to reproduce the content of the NOTICE file.
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//
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// You may obtain a copy of the Apache 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, software
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// distributed under the Apache License with the above modification is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the Apache License for the specific
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// language governing permissions and limitations under the Apache License.
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//
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#ifndef OSD_CPU_GL_VERTEX_BUFFER_H
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#define OSD_CPU_GL_VERTEX_BUFFER_H
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#include "../version.h"
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#include "../osd/opengl.h"
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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 cpu subvision and OpenGL drawing.
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///
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/// OsdCpuGLVertexBuffer implements OsdCpuVertexBufferInterface and
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/// OsdGLVertexBufferInterface.
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///
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/// The buffer interop between Cpu and GL is handled automatically when a
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/// client calls BindCpuBuffer and BindVBO methods.
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///
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class OsdCpuGLVertexBuffer {
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public:
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/// Creator. Returns NULL if error.
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static OsdCpuGLVertexBuffer * Create(int numElements, int numVertices);
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/// Destructor.
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~OsdCpuGLVertexBuffer();
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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);
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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 cpu memory. GL buffer will be mapped to cpu address
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/// if necessary.
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float * BindCpuBuffer();
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/// Returns the name of GL buffer object. If the buffer is mapped
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/// to cpu address, 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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OsdCpuGLVertexBuffer(int numElements, int numVertices);
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/// Allocates VBO for this buffer. Returns true if success.
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bool allocate();
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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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float *_cpuBuffer;
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bool _dataDirty;
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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_CPU_GL_VERTEX_BUFFER_H
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