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https://github.com/PixarAnimationStudios/OpenSubdiv
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0beb654f0b
Noticed a few typos when browsing comments. Proceeded with a "manual spell check", reading all comments and tweaking spelling, grammar, punctuation. Didn't bother with Hbr library. Comments only, no functional changes.
98 lines
3.1 KiB
C++
98 lines
3.1 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 OPENSUBDIV3_OSD_CPU_GL_VERTEX_BUFFER_H
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#define OPENSUBDIV3_OSD_CPU_GL_VERTEX_BUFFER_H
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#include "../version.h"
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#include <cstddef>
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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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namespace Osd {
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///
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/// \brief Concrete vertex buffer class for cpu subdivision and OpenGL drawing.
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///
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/// CpuGLVertexBuffer implements CpuVertexBufferInterface and
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/// GLVertexBufferInterface.
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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 CpuGLVertexBuffer {
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public:
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/// Creator. Returns NULL if error.
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static CpuGLVertexBuffer * Create(int numElements, int numVertices,
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void *deviceContext = NULL);
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/// Destructor.
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~CpuGLVertexBuffer();
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/// This method is meant to be used in client code in order to provide
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/// coarse vertices data to Osd.
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void UpdateData(const float *src, int startVertex, int numVertices,
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void *deviceContext = NULL);
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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(void *deviceContext = NULL);
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protected:
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/// Constructor.
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CpuGLVertexBuffer(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 Osd
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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 // OPENSUBDIV3_OSD_CPU_GL_VERTEX_BUFFER_H
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