113 lines
No EOL
2.4 KiB
C++
113 lines
No EOL
2.4 KiB
C++
/*
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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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#include "gui/GLBuffer.h"
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#include "gui/GLShader.h"
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#include <iostream>
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using namespace nse::gui;
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const GLuint BufferTargets[] =
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{
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GL_ARRAY_BUFFER,
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GL_ELEMENT_ARRAY_BUFFER
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#ifdef HAVE_SSBO
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, GL_SHADER_STORAGE_BUFFER
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#endif
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};
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GLBuffer::GLBuffer(GLBufferType type)
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: id(0), type(type)
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{}
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GLBuffer::~GLBuffer()
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{
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if (id != 0)
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glDeleteBuffers(1, &id);
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}
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void GLBuffer::bind()
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{
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if (id == 0)
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glGenBuffers(1, &id);
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glBindBuffer(BufferTargets[type], id);
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}
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void GLBuffer::bindBufferBase(unsigned int base) const
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{
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glBindBufferBase(BufferTargets[type], base, id);
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}
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void GLBuffer::bindToAttribute(const std::string& attribute)
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{
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assert(type == VertexBuffer);
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GLShader* prog = GLShader::currentProgram();
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auto attribID = prog->attrib(attribute);
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if (attribID >= 0)
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{
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glEnableVertexAttribArray(attribID);
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bind();
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if (integral)
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glVertexAttribIPointer(attribID, dim, glType, 0, 0);
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else
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glVertexAttribPointer(attribID, dim, glType, GL_FALSE, 0, 0);
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}
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else
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std::cout << "Warning: Attribute \"" << attribute << "\" not found in shader \"" << prog->name() << "\"." << std::endl;
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}
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void GLBuffer::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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{
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this->glType = glType;
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this->dim = dim;
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this->compSize = compSize;
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this->size = size;
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this->integral = integral;
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size_t totalSize = (size_t)size * (size_t)compSize;
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bind();
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glBufferData(BufferTargets[type], totalSize, data, GL_DYNAMIC_DRAW);
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}
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void GLBuffer::uploadData(uint32_t size, const void *data)
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{
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this->glType = -1;
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this->dim = -1;
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this->compSize = -1;
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this->size = size;
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this->integral = false;
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bind();
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glBufferData(BufferTargets[type], size, data, GL_DYNAMIC_DRAW);
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}
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void GLBuffer::downloadData(uint32_t size, int /* dim */,
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uint32_t compSize, GLuint /* glType */, uint8_t *data)
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{
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if(id == 0)
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throw std::runtime_error("The specified buffer has no data to download.");
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if (this->size != size || this->compSize != compSize)
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throw std::runtime_error("downloadData: size mismatch!");
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size_t totalSize = (size_t)size * (size_t)compSize;
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bind();
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glGetBufferSubData(BufferTargets[type], 0, totalSize, data);
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} |