void UnmappableBuffer::resizeBuffer(GLsizeiptr size) {
GLuint newBuffer;
size = nextPowerOfTwo(size);
glCreateBuffers(1, &newBuffer);
glNamedBufferData(newBuffer, size, nullptr, mUsage);
glCopyNamedBufferSubData(mId, newBuffer, 0, 0, mSize);
glDeleteBuffers(1, &mId);
mId = newBuffer;
mSize = size;
}
void ofBufferObject::copyTo(ofBufferObject & dstBuffer, int readOffset, int writeOffset, size_t size) const{
#ifdef GLEW_VERSION_4_5
if (GLEW_EXT_direct_state_access) {
glCopyNamedBufferSubData(data->id,dstBuffer.getId(),readOffset,writeOffset,size);
return;
}
#endif
bind(GL_COPY_READ_BUFFER);
dstBuffer.bind(GL_COPY_WRITE_BUFFER);
glCopyBufferSubData(GL_COPY_READ_BUFFER,GL_COPY_WRITE_BUFFER,readOffset,writeOffset,size);
unbind(GL_COPY_READ_BUFFER);
dstBuffer.unbind(GL_COPY_WRITE_BUFFER);
}
Buffer::Buffer(const Buffer & other) noexcept
: gl::Object{other}
{
glCreateBuffers(1, &m_name);
if (other.isValid()) {
GLuint otherSize {other.getByteSize()};
glNamedBufferData(m_name, otherSize, nullptr, GL_STATIC_DRAW);
glCopyNamedBufferSubData(other, m_name, 0, 0, otherSize);
}
}
void BufferImplementation_DirectStateAccessARB::copySubData(const Buffer * buffer, Buffer * other, GLintptr readOffset, GLintptr writeOffset, GLsizeiptr size) const
{
glCopyNamedBufferSubData(buffer->id(), other->id(), readOffset, writeOffset, static_cast<GLsizei>(size));
}