105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
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/*
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This file is part of NSEssentials.
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Use of this source code is granted via a BSD-style license, which can be found
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in License.txt in the repository root.
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@author Wenzel Jakob
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@author Nico Schertler
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*/
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#pragma once
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#include <nanogui/glutil.h>
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namespace nse {
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namespace gui
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{
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enum GLBufferType
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{
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VertexBuffer,
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IndexBuffer,
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};
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//Represents a generic OpenGL buffer
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class GLBuffer
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{
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public:
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GLBuffer(GLBufferType type);
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~GLBuffer();
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//Binds the buffer to the correct target slot.
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//If the buffer is not generated yet, a new buffer is generated.
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void bind();
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//Calls the according OpenGL function; mostly used for SSBOs
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void bindBufferBase(unsigned int base) const;
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/// Upload data from an Eigen matrix into the buffer
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template <typename Matrix>
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GLBuffer& uploadData(const Matrix &M)
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{
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uint32_t compSize = sizeof(typename Matrix::Scalar);
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GLuint glType = (GLuint)nanogui::detail::type_traits<typename Matrix::Scalar>::type;
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bool integral = (bool)nanogui::detail::type_traits<typename Matrix::Scalar>::integral;
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uploadData((uint32_t)M.size(), (int)M.rows(), compSize,
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glType, integral, (const uint8_t *)M.data());
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return *this;
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}
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template <typename Scalar, int Rows>
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GLBuffer& uploadData(const std::vector<Eigen::Matrix<Scalar, Rows, 1>>& data)
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{
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uint32_t compSize = sizeof(Scalar);
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GLuint glType = (GLuint)nanogui::detail::type_traits<Scalar>::type;
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bool integral = (bool)nanogui::detail::type_traits<Scalar>::integral;
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uploadData((uint32_t)data.size() * Rows, Rows, compSize,
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glType, integral, (const uint8_t *)data.data());
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return *this;
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}
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/// Download the data from the vertex buffer object into an Eigen matrix
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template <typename Matrix>
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void downloadData(Matrix &M)
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{
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uint32_t compSize = sizeof(typename Matrix::Scalar);
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GLuint glType = (GLuint)nanogui::detail::type_traits<typename Matrix::Scalar>::type;
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M.resize(dim, size / dim);
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downloadData(M.size(), M.rows(), compSize, glType, (uint8_t *)M.data());
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}
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//Binds the vertex buffer to the provided attribute of the currently bound GLShader program.
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void bindToAttribute(const std::string& attribute);
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/// Return the size of this buffer in bytes
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size_t bufferSize() const
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{
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return size;
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}
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void uploadData(uint32_t size, const void *data);
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void uploadData(uint32_t size, int dim,
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uint32_t compSize, GLuint glType, bool integral,
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const uint8_t *data);
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void downloadData(uint32_t size, int dim,
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uint32_t compSize, GLuint glType, uint8_t *data);
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protected:
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GLBufferType type;
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GLuint id;
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GLuint glType;
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GLuint dim;
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GLuint compSize;
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GLuint size;
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bool integral;
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};
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}
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}
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