mirror of https://github.com/axmolengine/axmol.git
63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
#include "BufferGL.h"
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#include <cassert>
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#include "base/ccMacros.h"
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CC_BACKEND_BEGIN
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BufferGL::BufferGL(unsigned int size, BufferType type, BufferUsage usage)
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: Buffer(size, type, usage)
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{
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glGenBuffers(1, &_buffer);
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}
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BufferGL::~BufferGL()
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{
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if (_buffer)
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glDeleteBuffers(1, &_buffer);
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}
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void BufferGL::updateData(void* data, unsigned int size)
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{
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assert(size && size <= _size);
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if (_buffer)
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{
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if (BufferType::VERTEX == _type)
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{
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glBindBuffer(GL_ARRAY_BUFFER, _buffer);
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glBufferData(GL_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
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}
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else
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{
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _buffer);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
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}
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CHECK_GL_ERROR_DEBUG();
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_bufferAllocated = size;
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}
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}
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void BufferGL::updateSubData(void* data, unsigned int offset, unsigned int size)
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{
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CCASSERT(_bufferAllocated != 0, "updateData should be invoke before updateSubData");
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CCASSERT(offset + size <= _bufferAllocated, "buffer size overflow");
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if (_buffer)
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{
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CHECK_GL_ERROR_DEBUG();
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if (BufferType::VERTEX == _type)
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{
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glBindBuffer(GL_ARRAY_BUFFER, _buffer);
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glBufferSubData(GL_ARRAY_BUFFER, offset, size, data);
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}
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else
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{
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _buffer);
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glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, offset, size, data);
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}
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CHECK_GL_ERROR_DEBUG();
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}
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}
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CC_BACKEND_END
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